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-rw-r--r--apps/pack.subx6020
1 files changed, 0 insertions, 6020 deletions
diff --git a/apps/pack.subx b/apps/pack.subx
deleted file mode 100644
index 39848f25..00000000
--- a/apps/pack.subx
+++ /dev/null
@@ -1,6020 +0,0 @@
-# Read a text file of SubX instructions from stdin, and convert it into a list
-# of whitespace-separated ascii hex bytes on stdout. Label definitions and
-# uses are left untouched.
-#
-# To run:
-#   $ ./bootstrap translate init.linux [01]*.subx apps/subx-params.subx apps/pack.subx  -o apps/pack
-#   $ echo '05/add-to-eax 0x20/imm32'  |./bootstrap run apps/pack
-# Expected output:
-#   05 20 00 00 00  # 05/add-to-eax 0x20/imm32
-# The original instruction gets included as a comment at the end of each
-# converted line.
-#
-# There's zero error-checking. For now we assume the input program is valid.
-# We'll continue to rely on the C++ version for error messages.
-
-== code
-#   instruction                     effective address                                                   register    displacement    immediate
-# . op          subop               mod             rm32          base        index         scale       r32
-# . 1-3 bytes   3 bits              2 bits          3 bits        3 bits      3 bits        2 bits      2 bits      0/1/2/4 bytes   0/1/2/4 bytes
-
-Entry:  # run tests if necessary, convert stdin if not
-    # . prologue
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-
-    # initialize heap
-    # . Heap = new-segment(Heap-size)
-    # . . push args
-    68/push  Heap/imm32
-    ff          6/subop/push        0/mod/indirect  5/rm32/.disp32            .             .           .           Heap-size/disp32                  # push *Heap-size
-    # . . call
-    e8/call  new-segment/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-
-    # - if argc > 1 and argv[1] == "test", then return run_tests()
-    # if (argc <= 1) goto interactive
-    81          7/subop/compare     1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0/disp8         1/imm32           # compare *ebp
-    7e/jump-if-<=  $subx-pack-main:interactive/disp8
-    # if (!kernel-string-equal?(argv[1], "test")) goto interactive
-    # . eax = kernel-string-equal?(argv[1], "test")
-    # . . push args
-    68/push  "test"/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  kernel-string-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto interactive
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $subx-pack-main:interactive/disp8
-    # run-tests()
-    e8/call  run-tests/disp32
-    # syscall(exit, *Num-test-failures)
-    8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/ebx   Num-test-failures/disp32          # copy *Num-test-failures to ebx
-    eb/jump  $subx-pack-main:end/disp8
-$subx-pack-main:interactive:
-    # - otherwise convert stdin
-    # subx-pack(Stdin, Stdout)
-    # . . push args
-    68/push  Stdout/imm32
-    68/push  Stdin/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x8/imm32         # add to esp
-    # syscall(exit, 0)
-    bb/copy-to-ebx  0/imm32
-$subx-pack-main:end:
-    e8/call  syscall_exit/disp32
-
-# - big picture
-# We'll operate on each line/instruction in isolation. That way we only need to
-# allocate memory for converting a single instruction.
-#
-# To pack an entire file, convert every segment in it
-# To convert a code segment, convert every instruction (line) until the next segment header
-# To convert a non-data segment, convert every word until the next segment header
-#
-# primary state: line
-#   stream of 512 bytes; abort if it ever overflows
-
-# conceptual hierarchy within a line:
-#   line = words separated by ' ', maybe followed by comment starting with '#'
-#   word = datum until '/', then 0 or more metadata separated by '/'
-#
-# we won't bother saving the internal structure of lines; reparsing should be cheap using three primitives:
-#   next-token(stream, delim char) -> slice (start, end pointers)
-#   next-token-from-slice(start, end, delim char) -> slice
-#   slice-equal?(slice, string)
-
-subx-pack:  # in: (addr buffered-file), out: (addr buffered-file)
-    # pseudocode:
-    #   var line: (stream byte 512)
-    #   var in-code? = false
-    #   while true
-    #     clear-stream(line)
-    #     read-line-buffered(in, line)
-    #     if (line->write == 0) break             # end of file
-    #     var word-slice = next-word(line)
-    #     if slice-empty?(word-slice)             # whitespace
-    #       write-stream-data(out, line)
-    #     else if (slice-equal?(word-slice, "=="))
-    #       word-slice = next-word(line)
-    #       in-code? = slice-equal?(word-slice, "code")
-    #       write-stream-data(out, line)
-    #     else if (in-code?)
-    #       rewind-stream(line)
-    #       convert-instruction(line, out)
-    #     else
-    #       rewind-stream(line)
-    #       convert-data(line, out)
-    #   flush(out)
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    # var line/ecx: (stream byte 512)
-    81          5/subop/subtract    3/mod/direct    4/rm32/esp    .           .             .           .           .               0x200/imm32       # subtract from esp
-    68/push  0x200/imm32/length
-    68/push  0/imm32/read
-    68/push  0/imm32/write
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # var word-slice/edx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    2/rm32/edx    .           .             .           4/r32/esp   .               .                 # copy esp to edx
-    # var in-code?/ebx: boolean = false
-    31/xor                          3/mod/direct    3/rm32/ebx    .           .             .           3/r32/ebx   .               .                 # clear ebx
-$subx-pack:loop:
-    # clear-stream(line)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # read-line-buffered(in, line)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  read-line-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$subx-pack:check0:
-    # if (line->write == 0) break
-    81          7/subop/compare     0/mod/indirect  1/rm32/ecx    .           .             .           .           .               0/imm32           # compare *ecx
-    0f 84/jump-if-=  $subx-pack:break/disp32
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, line)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # next-word(line, word-slice)
-    # . . push args
-    52/push-edx
-    51/push-ecx
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$subx-pack:check1:
-    # if (slice-empty?(word-slice)) write-stream-data(out, line)
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    52/push-edx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) write-stream-data(out, line)
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $subx-pack:pass-through/disp32
-$subx-pack:check2:
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     52/push-edx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # if (!slice-equal?(word-slice, "==")) goto next check
-    # . eax = slice-equal?(word-slice, "==")
-    # . . push args
-    68/push  "=="/imm32
-    52/push-edx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto check3
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $subx-pack:check3/disp32
-    # word-slice = next-word(line)
-    # . . push args
-    52/push-edx
-    51/push-ecx
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump segment name {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     52/push-edx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # in-code? = slice-equal?(word-slice, "code")
-    # . . push args
-    68/push  "code"/imm32
-    52/push-edx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . . in-code? = eax
-    89/copy                         3/mod/direct    3/rm32/ebx    .           .             .           0/r32/eax   .               .                 # copy eax to ebx
-    # write-stream-data(out, line)
-    eb/jump  $subx-pack:pass-through/disp8
-$subx-pack:check3:
-    # else rewind-stream(line)
-    # . rewind-stream(line)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # if (in-code? != false) convert-instruction(line, out)
-    81          7/subop/compare     3/mod/direct    3/rm32/ebx    .           .             .           .           .               0/imm32/false     # compare ebx
-    74/jump-if-=  $subx-pack:data/disp8
-$subx-pack:code:
-    # . convert-instruction(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    51/push-ecx
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . loop
-    e9/jump  $subx-pack:loop/disp32
-$subx-pack:data:
-    # else convert-data(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    51/push-ecx
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . loop
-    e9/jump  $subx-pack:loop/disp32
-$subx-pack:pass-through:
-    # write-stream-data(out, line)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-stream-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . loop
-    e9/jump  $subx-pack:loop/disp32
-$subx-pack:break:
-    # flush(out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-$subx-pack:end:
-    # . reclaim locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x214/imm32       # add to esp
-    # . restore registers
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-subx-pack-passes-empty-lines-through:
-    # if a line is empty, pass it along unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-input-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-input-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # write nothing to input
-    # subx-pack(_test-input-buffered-file, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-buffered-file/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-passes-empty-lines-through"/imm32
-    68/push  ""/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-subx-pack-passes-lines-with-just-whitespace-through:
-    # if a line is empty, pass it along unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-input-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-input-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "    ")
-    # . . push args
-    68/push  "    "/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # subx-pack(_test-input-buffered-file, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-buffered-file/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "    ", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-passes-with-just-whitespace-through"/imm32
-    68/push  "    "/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-subx-pack-passes-segment-headers-through:
-    # if a line starts with '==', pass it along unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-input-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-input-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "== abcd 0x1")
-    # . . push args
-    68/push  "== abcd 0x1"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # subx-pack(_test-input-buffered-file, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-buffered-file/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "== abcd 0x1", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-passes-segment-headers-through"/imm32
-    68/push  "== abcd 0x1"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-subx-pack-in-data-segment:
-    # correctly process lines in the data segment
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-input-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-input-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    #   == code 0x1
-    #   == data 0x2
-    #   3 4/imm32
-    # . write(_test-input-stream, "== code 0x1")
-    # . . push args
-    68/push  "== code 0x1\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "== data 0x2\n")
-    # . . push args
-    68/push  "== data 0x2\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "3 4/imm32\n")
-    # . . push args
-    68/push  "3 4/imm32\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # subx-pack(_test-input-buffered-file, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-buffered-file/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-#?     # debug print {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "== code 0x1", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-in-data-segment/0"/imm32
-    68/push  "== code 0x1"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "== data 0x2", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-in-data-segment/1"/imm32
-    68/push  "== data 0x2"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "03 04 00 00 00 ", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-in-data-segment/2"/imm32
-    68/push  "03 04 00 00 00 "/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-subx-pack-code-and-data-segments:
-    # correctly process lines in both code and data segments
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-input-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-input-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    #   == code 0x1
-    #   e8/call 20/disp32
-    #   68/push 0x20/imm8
-    #   == data 0x2
-    #   3 4/imm32
-    # . write(_test-input-stream, "== code 0x1\n")
-    # . . push args
-    68/push  "== code 0x1\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "e8/call 20/disp32\n")
-    # . . push args
-    68/push  "e8/call 20/disp32\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "68/push 0x20/imm8\n")
-    # . . push args
-    68/push  "68/push 0x20/imm8\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "== data 0x2\n")
-    # . . push args
-    68/push  "== data 0x2\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . write(_test-input-stream, "3 4/imm32\n")
-    # . . push args
-    68/push  "3 4/imm32\n"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # subx-pack(_test-input-buffered-file, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-buffered-file/imm32
-    # . . call
-    e8/call  subx-pack/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    #   == code 0x1
-    #   e8 20 00 00 00  # e8/call 20/disp32
-    #   68 20  # 68/push 0x20/imm8
-    #   == data 0x2
-    #   03 04 00 00 00
-#?     # debug print {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "== code 0x1", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-code-and-data-segments/0"/imm32
-    68/push  "== code 0x1"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "e8 20 00 00 00  # e8/call 20/disp32", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-code-and-data-segments/1"/imm32
-    68/push  "e8 20 00 00 00  # e8/call 20/disp32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "68 20  # 68/push 0x20/imm8", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-code-and-data-segments/2"/imm32
-    68/push  "68 20  # 68/push 0x20/imm8"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "== data 0x2", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-code-and-data-segments/3"/imm32
-    68/push  "== data 0x2"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . check-next-stream-line-equal(_test-output-stream, "03 04 00 00 00 ", msg)
-    # . . push args
-    68/push  "F - test-subx-pack-code-and-data-segments/4"/imm32
-    68/push  "03 04 00 00 00 "/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-next-stream-line-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-convert-data:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   var word-slice: slice
-    #   while true
-    #     word-slice = next-word(line)
-    #     if slice-empty?(word-slice)                 # end of file (maybe including trailing whitespace)
-    #       break  # skip emitting some whitespace
-    #     if slice-starts-with?(word-slice, "#")      # comment
-    #       write-slice-buffered(out, word-slice)
-    #       return
-    #     if slice-ends-with?(word-slice, ":")        # label
-    #       write-stream-data(out, line)
-    #       return
-    #     if has-metadata?(word-slice, "imm32")
-    #       emit(out, word-slice, 4)
-    #     # disp32 is not permitted in data segments, and anything else is only a byte long
-    #     else
-    #       emit(out, word-slice, 1)
-    #   write-buffered(out, "\n")
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # write-stream(2/stderr, line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$convert-data:loop:
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$convert-data:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) break
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $convert-data:break/disp32
-$convert-data:check-for-comment:
-    # if (slice-starts-with?(word-slice, "#"))
-    # . var start/edx: (addr byte) = word-slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . if (c != '#') goto next check
-    3d/compare-eax-and  0x23/imm32/hash
-    75/jump-if-!=  $convert-data:check-for-label/disp8
-$convert-data:comment:
-    # write-slice-buffered(out, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-slice-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # return
-    0f 85/jump-if-!=  $convert-data:end/disp32
-$convert-data:check-for-label:
-    # if (slice-ends-with?(word-slice, ":"))
-    # . var end/edx: (addr byte) = word-slice->end
-    8b/copy                         1/mod/*+disp8   1/rm32/ecx    .           .             .           2/r32/edx   4/disp8         .                 # copy *(ecx+4) to edx
-    # . var c/eax: byte = *(end-1)
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    1/mod/*+disp8   2/rm32/edx    .           .             .           0/r32/AL    -1/disp8        .                 # copy byte at *ecx to AL
-    # . if (c != ':') goto next check
-    3d/compare-eax-and  0x3a/imm32/colon
-    75/jump-if-!=  $convert-data:check-for-imm32/disp8
-$convert-data:label:
-    # write-stream-data(out, line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-stream-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # return
-    75/jump-if-!=  $convert-data:end/disp8
-$convert-data:check-for-imm32:
-    # if (has-metadata?(word-slice, "imm32"))
-    # . eax = has-metadata?(ecx, "imm32")
-    # . . push args
-    68/push  "imm32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) process as a single byte
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $convert-data:single-byte/disp8
-$convert-data:imm32:
-    # emit(out, word-slice, 4)
-    # . . push args
-    68/push  4/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    e9/jump  $convert-data:loop/disp32
-$convert-data:single-byte:
-    # emit(out, word-slice, 1)
-    # . . push args
-    68/push  1/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    e9/jump  $convert-data:loop/disp32
-$convert-data:break:
-    # write-buffered(out, "\n")
-    # . . push args
-    68/push  Newline/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$convert-data:end:
-    # . reclaim locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-passes-comments-through:
-    # if a line starts with '#', pass it along unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "# abcd")
-    # . . push args
-    68/push  "# abcd"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "# abcd", msg)
-    # . . push args
-    68/push  "F - test-convert-data-passes-comments-through"/imm32
-    68/push  "# abcd"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-passes-labels-through:
-    # if the first word ends with ':', pass along the entire line unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "ab: # cd")
-    # . . push args
-    68/push  "ab: # cd"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "ab: # cd", msg)
-    # . . push args
-    68/push  "F - test-convert-data-passes-labels-through"/imm32
-    68/push  "ab: # cd"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-passes-names-through:
-    # If a word is a valid name, just emit it unchanged.
-    # Later phases will deal with it.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "abcd/imm32")
-    # . . push args
-    68/push  "abcd/imm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "abcd/imm32 \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-passes-names-through"/imm32
-    68/push  "abcd/imm32 \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-handles-imm32:
-    # If a word has the /imm32 metadata, emit it in 4 bytes.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "30/imm32")
-    # . . push args
-    68/push  "30/imm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that 4 bytes were written
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "30 00 00 00 \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-handles-imm32"/imm32
-    68/push  "30 00 00 00 \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-handles-single-byte:
-    # Any metadata but /imm32 will emit a single byte.
-    # Data segments can't have /disp32, and SubX doesn't support 16-bit operands.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "30/imm16")
-    # . . push args
-    68/push  "30/imm16"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that a single byte was written (imm16 is not a valid operand type)
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "30 \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-handles-single-byte"/imm32
-    68/push  "30 \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-multiple-bytes:
-    # Multiple single-byte words in input stream get processed one by one.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "1 2")
-    # . . push args
-    68/push  "1 2"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "01 02 \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-multiple-bytes"/imm32
-    68/push  "01 02 \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-byte-then-name:
-    # Single-byte word followed by valid name get processed one by one.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "30 abcd/o")
-    # . . push args
-    68/push  "30 abcd/o"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "30 abcd/o \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-byte-then-name"/imm32
-    68/push  "30 abcd/o \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-multiple-words:
-    # Multiple words in input stream get processed one by one.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "30 abcd/o 42e1/imm32")
-    # . . push args
-    68/push  "30 abcd/o 42e1/imm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "30 abcd/o 42 e1 00 00 \n", msg)
-    # . . push args
-    68/push  "F - test-convert-data-multiple-words"/imm32
-    68/push  "30 abcd/o e1 42 00 00 \n"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-data-trailing-comment:
-    # Trailing comments in data segment get appropriately ignored.
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "30/imm32 # comment")
-    # . . push args
-    68/push  "30/imm32 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-data(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "30 00 00 00 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-data-trailing-comment"/imm32
-    68/push  "30 00 00 00 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-# pack an instruction, following the C++ version
-#
-# zero error handling at the moment (continuing to rely on the C++ version for that):
-#   missing fields are always 0-filled
-#   bytes never mentioned are silently dropped; if you don't provide /mod, /rm32 or /r32 you don't get a 0 ModR/M byte. You get *no* ModR/M byte.
-#   may pick up any of duplicate operands in an instruction
-#   silently drop extraneous operands
-#   unceremoniously abort on non-numeric operands except disp or imm
-#   opcodes must be lowercase and zero padded
-#   opcodes with misleading operand metadata may get duplicated as operands as well. don't rely on this.
-convert-instruction:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   # some early exits
-    #   var word-slice = next-word(line)
-    #   if slice-empty?(word-slice)
-    #     write-stream-data(out, line)
-    #     return
-    #   if slice-starts-with?(word-slice, "#")
-    #     write-stream-data(out, line)
-    #     return
-    #   if slice-ends-with?(word-slice, ":")
-    #     write-stream-data(out, line)
-    #     return
-    #   # really convert
-    #   emit-opcodes(line, out)
-    #   emit-modrm(line, out)
-    #   emit-sib(line, out)
-    #   emit-disp(line, out)
-    #   emit-imm(line, out)
-    #   emit-line-in-comment(line, out)
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$convert-instruction:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) pass through
-    3d/compare-eax-and  0/imm32/false
-    75/jump-if-!=  $convert-instruction:pass-through/disp8
-$convert-instruction:check1:
-    # if (slice-starts-with?(word-slice, "#")) write-stream-data(out, line)
-    # . var start/edx: (addr byte) = word-slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . if (c == '#') pass through
-    3d/compare-eax-and  0x23/imm32/hash
-    74/jump-if-=  $convert-instruction:pass-through/disp8
-$convert-instruction:check2:
-    # if (slice-ends-with?(word-slice, ":")) write-stream-data(out, line)
-    # . var end/edx: (addr byte) = word-slice->end
-    8b/copy                         1/mod/*+disp8   1/rm32/ecx    .           .             .           2/r32/edx   4/disp8         .                 # copy *(ecx+4) to edx
-    # . var c/eax: byte = *(end-1)
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    1/mod/*+disp8   2/rm32/edx    .           .             .           0/r32/AL    -1/disp8        .                 # copy byte at *ecx to AL
-    # . if (c == ':') pass through
-    3d/compare-eax-and  0x3a/imm32/colon
-    75/jump-if-!=  $convert-instruction:really-convert/disp8
-$convert-instruction:pass-through:
-    # write-stream-data(out, line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-stream-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # return
-    eb/jump  $convert-instruction:end/disp8
-$convert-instruction:really-convert:
-    # emit-opcodes(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-opcodes/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # emit-modrm(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-modrm/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # emit-sib(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-sib/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # emit-disp(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-disp/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # emit-imm(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-imm/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # emit-line-in-comment(line, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  emit-line-in-comment/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$convert-instruction:end:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-opcodes:  # line: (addr stream byte), out: (addr buffered-file)
-    # opcodes occupy 1-3 bytes:
-    #   xx
-    #   0f xx
-    #   f2 xx
-    #   f3 xx
-    #   f2 0f xx
-    #   f3 0f xx
-    #
-    # pseudocode:
-    #   rewind-stream(line)
-    #
-    #   var op1 = next-word(line)
-    #   if (slice-empty?(op1) || slice-starts-with?(op1, "#")) return
-    #   op1 = next-token-from-slice(op1->start, op1->end, "/")
-    #   write-slice-buffered(out, op1)
-    #   if !slice-equal?(op1, "0f") && !slice-equal?(op1, "f2") && !slice-equal?(op1, "f3")
-    #     return
-    #
-    #   var op2 = next-word(line)
-    #   if (slice-empty?(op2) || slice-starts-with?(op2, "#")) return
-    #   op2 = next-token-from-slice(op2->start, op2->end, "/")
-    #   write-slice-buffered(out, op2)
-    #   if slice-equal?(op1, "0f")
-    #     return
-    #   if !slice-equal?(op2, "0f")
-    #     return
-    #
-    #   var op3 = next-word(line)
-    #   if (slice-empty?(op3) || slice-starts-with?(op3, "#")) return
-    #   op3 = next-token-from-slice(op3->start, op3->end, "/")
-    #   write-slice-buffered(out, op3)
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    # var op1/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # var op2/edx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    2/rm32/edx    .           .             .           4/r32/esp   .               .                 # copy esp to edx
-    # rewind-stream(line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-$emit-opcodes:op1:
-    # next-word(line, op1)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # if (slice-empty?(op1)) return
-    # . eax = slice-empty?(op1)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) return
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-opcodes:end/disp32
-    # if (slice-starts-with?(op1, "#")) return
-    # . var start/ebx: (addr byte) = op1->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           3/r32/ebx   .               .                 # copy *ecx to ebx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  3/rm32/ebx    .           .             .           0/r32/AL    .               .                 # copy byte at *ebx to AL
-    # . if (c == '#') return
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-opcodes:end/disp32
-    # op1 = next-token-from-slice(op1->start, op1->end, '/')
-    # . . push args
-    51/push-ecx
-    68/push  0x2f/imm32/slash
-    ff          6/subop/push        1/mod/*+disp8   1/rm32/ecx    .           .             .           .           4/disp8         .                 # push *(ecx+4)
-    ff          6/subop/push        0/mod/indirect  1/rm32/ecx    .           .             .           .           .               .                 # push *ecx
-    # . . call
-    e8/call  next-token-from-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # write-slice-buffered(out, op1)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-slice-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # write-buffered(out, " ")
-    # . . push args
-    68/push  Space/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # if (slice-equal?(op1, "0f")) goto op2
-    # . eax = slice-equal?(op1, "0f")
-    # . . push args
-    68/push  "0f"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax != false) goto op2
-    3d/compare-eax-and  0/imm32/false
-    75/jump-if-!=  $emit-opcodes:op2/disp8
-    # if (slice-equal?(op1, "f2")) goto op2
-    # . eax = slice-equal?(op1, "f2")
-    # . . push args
-    68/push  "f2"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax != false) goto op2
-    3d/compare-eax-and  0/imm32/false
-    75/jump-if-!=  $emit-opcodes:op2/disp8
-    # if (slice-equal?(op1, "f3")) goto op2
-    # . eax = slice-equal?(op1, "f3")
-    # . . push args
-    68/push  "f3"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax != false) goto op2
-    3d/compare-eax-and  0/imm32/false
-    75/jump-if-!=  $emit-opcodes:op2/disp8
-    # otherwise return
-    e9/jump  $emit-opcodes:end/disp32
-$emit-opcodes:op2:
-    # next-word(line, op2)
-    # . . push args
-    52/push-edx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # if (slice-empty?(op2)) return
-    # . eax = slice-empty?(op2)
-    # . . push args
-    52/push-edx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) return
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-opcodes:end/disp32
-    # if (slice-starts-with?(op2, "#")) return
-    # . var start/ebx: (addr byte) = op2->start
-    8b/copy                         0/mod/indirect  2/rm32/edx    .           .             .           3/r32/ebx   .               .                 # copy *edx to ebx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  3/rm32/ebx    .           .             .           0/r32/AL    .               .                 # copy byte at *ebx to AL
-    # . if (c == '#') return
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-opcodes:end/disp32
-    # op2 = next-token-from-slice(op2->start, op2->end, '/')
-    # . . push args
-    52/push-edx
-    68/push  0x2f/imm32/slash
-    ff          6/subop/push        1/mod/*+disp8   2/rm32/edx    .           .             .           .           4/disp8         .                 # push *(edx+4)
-    ff          6/subop/push        0/mod/indirect  2/rm32/edx    .           .             .           .           .               .                 # push *edx
-    # . . call
-    e8/call  next-token-from-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # write-slice-buffered(out, op2)
-    # . . push args
-    52/push-edx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-slice-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # write-buffered(out, " ")
-    # . . push args
-    68/push  Space/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # if (slice-equal?(op1, "0f")) return
-    # . eax = slice-equal?(op1, "0f")
-    # . . push args
-    68/push  "0f"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax != false) return
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-opcodes:end/disp32
-    # if (!slice-equal?(op2, "0f")) return
-    # . eax = slice-equal?(op2, "0f")
-    # . . push args
-    68/push  "0f"/imm32
-    52/push-edx
-    # . . call
-    e8/call  slice-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) return
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $emit-opcodes:end/disp32
-$emit-opcodes:op3:
-    # next-word(line, op3)  # reuse op2/edx
-    # . . push args
-    52/push-edx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # if (slice-empty?(op3)) return
-    # . eax = slice-empty?(op3)
-    # . . push args
-    52/push-edx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) return
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-opcodes:end/disp32
-    # if (slice-starts-with?(op3, "#")) return
-    # . var start/ebx: (addr byte) = op2->start
-    8b/copy                         0/mod/indirect  2/rm32/edx    .           .             .           3/r32/ebx   .               .                 # copy *edx to ebx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  3/rm32/ebx    .           .             .           0/r32/AL    .               .                 # copy byte at *ebx to AL
-    # . if (c == '#') return
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-opcodes:end/disp32
-    # op3 = next-token-from-slice(op3->start, op3->end, '/')
-    # . . push args
-    52/push-edx
-    68/push  0x2f/imm32/slash
-    ff          6/subop/push        1/mod/*+disp8   2/rm32/edx    .           .             .           .           4/disp8         .                 # push *(edx+4)
-    ff          6/subop/push        0/mod/indirect  2/rm32/edx    .           .             .           .           .               .                 # push *edx
-    # . . call
-    e8/call  next-token-from-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # write-slice-buffered(out, op3)
-    # . . push args
-    52/push-edx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-slice-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # write-buffered(out, " ")
-    # . . push args
-    68/push  Space/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$emit-opcodes:end:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # . restore registers
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-modrm:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   rewind-stream(line)
-    #   var has-modrm? = false, mod = 0, rm32 = 0, r32 = 0
-    #   var word-slice: slice
-    #   while true
-    #     word-slice = next-word(line)
-    #     if (slice-empty?(word-slice)) break
-    #     if (slice-starts-with?(word-slice, "#")) break
-    #     if (has-metadata?(word-slice, "mod"))
-    #       mod = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-modrm? = true
-    #     else if has-metadata?(word-slice, "rm32") or has-metadata?(word-slice, "xm32")
-    #       rm32 = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-modrm? = true
-    #     else if has-metadata?(word-slice, "r32") or has-metadata?(word-slice, "x32") or has-metadata?(word-slice, "subop")
-    #       r32 = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-modrm? = true
-    #   if has-modrm?
-    #     var modrm = mod & 0b11
-    #     modrm <<= 3
-    #     modrm |= r32 & 0b111
-    #     modrm <<= 3
-    #     modrm |= rm32 & 0b111
-    #     emit-hex(out, modrm, 1)
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    56/push-esi
-    57/push-edi
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # var has-modrm?/edx: boolean = false
-    31/xor                          3/mod/direct    2/rm32/edx    .           .             .           2/r32/edx   .               .                 # clear edx
-    # var mod/ebx: byte = 0
-    31/xor                          3/mod/direct    3/rm32/ebx    .           .             .           3/r32/ebx   .               .                 # clear ebx
-    # var rm32/esi: byte = 0
-    31/xor                          3/mod/direct    6/rm32/esi    .           .             .           6/r32/esi   .               .                 # clear esi
-    # var r32/edi: byte = 0
-    31/xor                          3/mod/direct    7/rm32/edi    .           .             .           7/r32/edi   .               .                 # clear edi
-    # rewind-stream(line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . rewind-stream(line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     # . . call
-#?     e8/call  rewind-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # }}}
-$emit-modrm:loop:
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-modrm:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) pass through
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-modrm:break/disp32
-$emit-modrm:check1:
-    # if (slice-starts-with?(word-slice, "#")) break
-    # . spill edx
-    52/push-edx
-    # . var start/edx: (addr byte) = word-slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . restore edx
-    5a/pop-to-edx
-    # . if (c == '#') pass through
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-modrm:break/disp32
-$emit-modrm:check-for-mod:
-    # if (has-metadata?(word-slice, "mod"))
-    # . eax = has-metadata?(ecx, "mod")
-    # . . push args
-    68/push  "mod"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-modrm:check-for-rm32/disp8
-$emit-modrm:mod:
-    # mod = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . mod = eax
-    89/copy                         3/mod/direct    3/rm32/ebx    .           .             .           0/r32/eax   .               .                 # copy eax to ebx
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:check-for-rm32:
-    # if (has-metadata?(word-slice, "rm32"))
-    # . eax = has-metadata?(ecx, "rm32")
-    # . . push args
-    68/push  "rm32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-modrm:check-for-xm32/disp8
-$emit-modrm:rm32:
-    # rm32 = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . rm32 = eax
-    89/copy                         3/mod/direct    6/rm32/esi    .           .             .           0/r32/eax   .               .                 # copy eax to esi
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:check-for-xm32:
-    # if (has-metadata?(word-slice, "xm32"))
-    # . eax = has-metadata?(ecx, "xm32")
-    # . . push args
-    68/push  "xm32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-modrm:check-for-r32/disp8
-$emit-modrm:xm32:
-    # rm32 = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . rm32 = eax
-    89/copy                         3/mod/direct    6/rm32/esi    .           .             .           0/r32/eax   .               .                 # copy eax to esi
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:check-for-r32:
-    # if (has-metadata?(word-slice, "r32"))
-    # . eax = has-metadata?(ecx, "r32")
-    # . . push args
-    68/push  "r32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-modrm:check-for-x32/disp8
-$emit-modrm:r32:
-    # r32 = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . r32 = eax
-    89/copy                         3/mod/direct    7/rm32/edi    .           .             .           0/r32/eax   .               .                 # copy eax to edi
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:check-for-x32:
-    # if (has-metadata?(word-slice, "x32"))
-    # . eax = has-metadata?(ecx, "x32")
-    # . . push args
-    68/push  "x32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-modrm:check-for-subop/disp8
-$emit-modrm:x32:
-    # r32 = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . r32 = eax
-    89/copy                         3/mod/direct    7/rm32/edi    .           .             .           0/r32/eax   .               .                 # copy eax to edi
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:check-for-subop:
-    # if (has-metadata?(word-slice, "subop"))
-    # . eax = has-metadata?(ecx, "subop")
-    # . . push args
-    68/push  "subop"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) loop
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $emit-modrm:loop/disp32
-$emit-modrm:subop:
-    # r32 = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . r32 = eax
-    89/copy                         3/mod/direct    7/rm32/edi    .           .             .           0/r32/eax   .               .                 # copy eax to edi
-    # has-modrm? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-modrm:loop/disp32
-$emit-modrm:break:
-    # if (!has-modrm?) return
-    81          7/subop/compare     3/mod/direct    2/rm32/edx    .           .             .           .           .               0/imm32/false     # compare edx
-    74/jump-if-=  $emit-modrm:end/disp8
-$emit-modrm:calculate:
-    # var modrm/ebx: byte = mod & 0b11
-    81          4/subop/and         3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm32/0b11      # bitwise and of ebx
-    # modrm <<= 3
-    c1/shift    4/subop/left        3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm8            # shift ebx left by 3 bits
-    # modrm |= r32 & 0b111
-    81          4/subop/and         3/mod/direct    7/rm32/edi    .           .             .           .           .               7/imm32/0b111     # bitwise and of edi
-    09/or                           3/mod/direct    3/rm32/ebx    .           .             .           7/r32/edi   .               .                 # ebx = bitwise OR with edi
-    # modrm <<= 3
-    c1/shift    4/subop/left        3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm8            # shift ebx left by 3 bits
-    # modrm |= rm32 & 0b111
-    81          4/subop/and         3/mod/direct    6/rm32/esi    .           .             .           .           .               7/imm32/0b111     # bitwise and of esi
-    09/or                           3/mod/direct    3/rm32/ebx    .           .             .           6/r32/esi   .               .                 # ebx = bitwise OR with esi
-$emit-modrm:emit:
-    # emit-hex(out, modrm, 1)
-    # . . push args
-    68/push  1/imm32
-    53/push-ebx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit-hex/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-$emit-modrm:end:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5f/pop-to-edi
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-sib:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   var has-sib? = false, base = 0, index = 0, scale = 0
-    #   var word-slice: slice
-    #   while true
-    #     word-slice = next-word(line)
-    #     if (slice-empty?(word-slice)) break
-    #     if (slice-starts-with?(word-slice, "#")) break
-    #     if (has-metadata?(word-slice, "base")
-    #       base = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-sib? = true
-    #     else if (has-metadata?(word-slice, "index")
-    #       index = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-sib? = true
-    #     else if (has-metadata?(word-slice, "scale")
-    #       scale = parse-hex-int-from-slice(next-token-from-slice(word-slice, "/"))
-    #       has-sib? = true
-    #   if has-sib?
-    #     var sib = scale & 0b11
-    #     sib <<= 3
-    #     sib |= index & 0b111
-    #     sib <<= 3
-    #     sib |= base & 0b111
-    #     emit-hex(out, sib, 1)
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    56/push-esi
-    57/push-edi
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # var has-sib?/edx: boolean = false
-    31/xor                          3/mod/direct    2/rm32/edx    .           .             .           2/r32/edx   .               .                 # clear edx
-    # var scale/ebx: byte = 0
-    31/xor                          3/mod/direct    3/rm32/ebx    .           .             .           3/r32/ebx   .               .                 # clear ebx
-    # var base/esi: byte = 0
-    31/xor                          3/mod/direct    6/rm32/esi    .           .             .           6/r32/esi   .               .                 # clear esi
-    # var index/edi: byte = 0
-    31/xor                          3/mod/direct    7/rm32/edi    .           .             .           7/r32/edi   .               .                 # clear edi
-    # rewind-stream(line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-$emit-sib:loop:
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-sib:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) pass through
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-sib:break/disp32
-$emit-sib:check1:
-    # if (slice-starts-with?(word-slice, "#")) break
-    # . spill edx
-    52/push-edx
-    # . var start/edx: (addr byte) = word-slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . restore edx
-    5a/pop-to-edx
-    # . if (c == '#') pass through
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-sib:break/disp32
-$emit-sib:check-for-scale:
-    # if (has-metadata?(word-slice, "scale"))
-    # . eax = has-metadata?(ecx, "scale")
-    # . . push args
-    68/push  "scale"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-sib:check-for-base/disp8
-$emit-sib:scale:
-    # scale = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . scale = eax
-    89/copy                         3/mod/direct    3/rm32/ebx    .           .             .           0/r32/eax   .               .                 # copy eax to ebx
-    # has-sib? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-sib:loop/disp32
-$emit-sib:check-for-base:
-    # if (has-metadata?(word-slice, "base"))
-    # . eax = has-metadata?(ecx, "base")
-    # . . push args
-    68/push  "base"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-sib:check-for-index/disp8
-$emit-sib:base:
-    # base = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . base = eax
-    89/copy                         3/mod/direct    6/rm32/esi    .           .             .           0/r32/eax   .               .                 # copy eax to esi
-    # has-sib? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-sib:loop/disp32
-$emit-sib:check-for-index:
-    # if (has-metadata?(word-slice, "index"))
-    # . eax = has-metadata?(ecx, "index")
-    # . . push args
-    68/push  "index"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) loop
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $emit-sib:loop/disp32
-$emit-sib:index:
-    # index = parse-hex-int-from-slice(next-token-from-slice(word-slice->start, word-slice->end, '/'))
-    # . eax = parse-datum-of-word(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-datum-of-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . index = eax
-    89/copy                         3/mod/direct    7/rm32/edi    .           .             .           0/r32/eax   .               .                 # copy eax to edi
-    # has-sib? = true
-    ba/copy-to-edx  1/imm32/true
-    # continue
-    e9/jump  $emit-sib:loop/disp32
-$emit-sib:break:
-    # if (!has-sib?) return
-    81          7/subop/compare     3/mod/direct    2/rm32/edx    .           .             .           .           .               0/imm32/false     # compare edx
-    74/jump-if-=  $emit-sib:end/disp8
-$emit-sib:calculate:
-    # var sib/ebx: byte = scale & 0b11
-    81          4/subop/and         3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm32/0b11      # bitwise and of ebx
-    # sib <<= 2
-    c1/shift    4/subop/left        3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm8            # shift ebx left by 3 bits
-    # sib |= index & 0b111
-    81          4/subop/and         3/mod/direct    7/rm32/edi    .           .             .           .           .               7/imm32/0b111     # bitwise and of edi
-    09/or                           3/mod/direct    3/rm32/ebx    .           .             .           7/r32/edi   .               .                 # ebx = bitwise OR with edi
-    # sib <<= 3
-    c1/shift    4/subop/left        3/mod/direct    3/rm32/ebx    .           .             .           .           .               3/imm8            # shift ebx left by 3 bits
-    # sib |= base & 0b111
-    81          4/subop/and         3/mod/direct    6/rm32/esi    .           .             .           .           .               7/imm32/0b111     # bitwise and of esi
-    09/or                           3/mod/direct    3/rm32/ebx    .           .             .           6/r32/esi   .               .                 # ebx = bitwise OR with esi
-$emit-sib:emit:
-    # emit-hex(out, sib, 1)
-    # . . push args
-    68/push  1/imm32
-    53/push-ebx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit-hex/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-$emit-sib:end:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5f/pop-to-edi
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-disp:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   rewind-stream(line)
-    #   var word-slice: slice
-    #   while true
-    #     word-slice = next-word(line)
-    #     if (slice-empty?(word-slice)) break
-    #     if (slice-starts-with?(word-slice, "#")) break
-    #     if has-metadata?(word-slice, "disp32")
-    #       emit(out, word-slice, 4)
-    #       break
-    #     if has-metadata?(word-slice, "disp16")
-    #       emit(out, word-slice, 2)
-    #       break
-    #     if has-metadata?(word-slice, "disp8")
-    #       emit(out, word-slice, 1)
-    #       break
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # rewind-stream(line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-disp:loop:
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-disp:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) pass through
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-disp:break/disp32
-$emit-disp:check1:
-    # if (slice-starts-with?(word-slice, "#")) break
-    # . var start/edx: (addr byte) = word-slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . if (c == '#') break
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-disp:break/disp32
-$emit-disp:check-for-disp32:
-    # if (has-metadata?(word-slice, "disp32"))
-    # . eax = has-metadata?(ecx, "disp32")
-    # . . push args
-    68/push  "disp32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-disp:check-for-disp16/disp8
-$emit-disp:disp32:
-    # emit(out, word-slice, 4)
-    # . . push args
-    68/push  4/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-    e9/jump  $emit-disp:break/disp32
-$emit-disp:check-for-disp16:
-    # else if (has-metadata?(word-slice, "disp16"))
-    # . eax = has-metadata?(ecx, "disp16")
-    # . . push args
-    68/push  "disp16"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-disp:check-for-disp8/disp8
-$emit-disp:disp16:
-    # emit(out, word-slice, 2)
-    # . . push args
-    68/push  2/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-    e9/jump  $emit-disp:break/disp32
-$emit-disp:check-for-disp8:
-    # if (has-metadata?(word-slice, "disp8"))
-    # . eax = has-metadata?(ecx, "disp8")
-    # . . push args
-    68/push  "disp8"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) loop
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $emit-disp:loop/disp32
-$emit-disp:disp8:
-    # emit(out, word-slice, 1)
-    # . . push args
-    68/push  1/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-$emit-disp:break:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-imm:  # line: (addr stream byte), out: (addr buffered-file)
-    # pseudocode:
-    #   rewind-stream(line)
-    #   var word-slice: slice
-    #   while true
-    #     word-slice = next-word(line)
-    #     if (slice-empty?(word-slice)) break
-    #     if (slice-starts-with?(word-slice, "#")) break
-    #     if has-metadata?(word-slice, "imm32")
-    #       emit(out, word-slice, 4)
-    #       break
-    #     if has-metadata?(word-slice, "imm16")
-    #       emit(out, word-slice, 2)
-    #       break
-    #     if has-metadata?(word-slice, "imm8")
-    #       emit(out, word-slice, 1)
-    #       break
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    50/push-eax
-    51/push-ecx
-    52/push-edx
-    # var word-slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # rewind-stream(line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  rewind-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump line {{{
-#?     # . write(2/stderr, "LL: ")
-#?     # . . push args
-#?     68/push  "LL: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, line)
-#?     # . . push args
-#?     ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-imm:loop:
-    # next-word(line, word-slice)
-    # . . push args
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  next-word/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # dump word-slice {{{
-#?     # . write(2/stderr, "AA: ")
-#?     # . . push args
-#?     68/push  "AA: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . clear-stream($Stderr->buffer)
-#?     # . . push args
-#?     68/push  $Stderr->buffer/imm32
-#?     # . . call
-#?     e8/call  clear-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write-slice-buffered(Stderr, word-slice)
-#?     # . . push args
-#?     51/push-ecx
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  write-slice-buffered/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . flush(Stderr)
-#?     # . . push args
-#?     68/push  Stderr/imm32
-#?     # . . call
-#?     e8/call  flush/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-$emit-imm:check0:
-    # if (slice-empty?(word-slice)) break
-    # . eax = slice-empty?(word-slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  slice-empty?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . if (eax != false) pass through
-    3d/compare-eax-and  0/imm32/false
-    0f 85/jump-if-!=  $emit-imm:break/disp32
-$emit-imm:check1:
-    # if (slice-starts-with?(word-slice, "#")) break
-    # . var start/edx: (addr byte) = slice->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # copy *ecx to edx
-    # . var c/eax: byte = *start
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           0/r32/AL    .               .                 # copy byte at *edx to AL
-    # . if (c == '#') break
-    3d/compare-eax-and  0x23/imm32/hash
-    0f 84/jump-if-=  $emit-imm:break/disp32
-$emit-imm:check-for-imm32:
-    # if (has-metadata?(word-slice, "imm32"))
-    # . eax = has-metadata?(ecx, "imm32")
-    # . . push args
-    68/push  "imm32"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-imm:check-for-imm16/disp8
-$emit-imm:imm32:
-    # emit(out, word-slice, 4)
-    # . . push args
-    68/push  4/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-    e9/jump  $emit-imm:break/disp32
-$emit-imm:check-for-imm16:
-    # if (has-metadata?(word-slice, "imm16"))
-    # . eax = has-metadata?(ecx, "imm16")
-    # . . push args
-    68/push  "imm16"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) goto next check
-    3d/compare-eax-and  0/imm32/false
-    74/jump-if-=  $emit-imm:check-for-imm8/disp8
-$emit-imm:imm16:
-    # emit(out, word-slice, 2)
-    # . . push args
-    68/push  2/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-    e9/jump  $emit-imm:break/disp32
-$emit-imm:check-for-imm8:
-    # if (has-metadata?(word-slice, "imm8"))
-    # . eax = has-metadata?(ecx, "imm8")
-    # . . push args
-    68/push  "imm8"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  has-metadata?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . if (eax == false) loop
-    3d/compare-eax-and  0/imm32/false
-    0f 84/jump-if-=  $emit-imm:loop/disp32
-$emit-imm:imm8:
-    # emit(out, word-slice, 1)
-    # . . push args
-    68/push  1/imm32
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  emit/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # break
-$emit-imm:break:
-    # . restore locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-emit-line-in-comment:  # line: (addr stream byte), out: (addr buffered-file)
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # write-buffered(out, " # ")
-    # . . push args
-    68/push  " # "/imm32
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-buffered/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # write-stream-data(out, line)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0xc/disp8       .                 # push *(ebp+12)
-    # . . call
-    e8/call  write-stream-data/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-$emit-line-in-comment:end:
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-passes-comments-through:
-    # if a line starts with '#', pass it along unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "# abcd")
-    # . . push args
-    68/push  "# abcd"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "# abcd", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-passes-comments-through"/imm32
-    68/push  "# abcd"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-passes-labels-through:
-    # if the first word ends with ':', pass along the entire line unchanged
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "ab: # cd")
-    # . . push args
-    68/push  "ab: # cd"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check that the line just passed through
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . check-stream-equal(_test-output-stream, "ab: # cd", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-passes-labels-through"/imm32
-    68/push  "ab: # cd"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-single-opcode:
-    # if the instruction consists of a single opcode, strip its metadata and pass it along
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "ab/cd # comment")
-    # . . push args
-    68/push  "ab/cd # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "ab  # ab/cd # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-single-opcode"/imm32
-    68/push  "ab  # ab/cd # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-0f-opcode:
-    # if the instruction starts with 0f opcode, include a second opcode
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "0f/m1 ab/m2 # comment")
-    # . . push args
-    68/push  "0f/m1 ab/m2 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "0f ab  # 0f/m1 ab/m2 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-0f-opcode"/imm32
-    68/push  "0f ab  # 0f/m1 ab/m2 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-f2-opcode:
-    # if the instruction starts with f2 opcode, include a second opcode
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f2/m1 ab/m2 # comment")
-    # . . push args
-    68/push  "f2/m1 ab/m2 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f2 ab  # f2/m1 ab/m2 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-f2-opcode"/imm32
-    68/push  "f2 ab  # f2/m1 ab/m2 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-f3-opcode:
-    # if the instruction starts with f3 opcode, include a second opcode
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f3/m1 ab/m2 # comment")
-    # . . push args
-    68/push  "f3/m1 ab/m2 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f3 ab  # f3/m1 ab/m2 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-f3-opcode"/imm32
-    68/push  "f3 ab  # f3/m1 ab/m2 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-f2-0f-opcode:
-    # if the instruction starts with f2 0f opcode, include a second opcode
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f2/m1 0f/m2 ab/m3 # comment")
-    # . . push args
-    68/push  "f2/m1 0f/m2 ab/m3 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f2 0f ab  # f2/m1 0f/m2 ab/m3 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-f2-0f-opcode"/imm32
-    68/push  "f2 0f ab  # f2/m1 0f/m2 ab/m3 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-f3-0f-opcode:
-    # if the instruction starts with f3 0f opcode, include a second opcode
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f3/m1 0f/m2 ab/m3 # comment")
-    # . . push args
-    68/push  "f3/m1 0f/m2 ab/m3 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f3 0f ab  # f3/m1 0f/m2 ab/m3 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-f3-0f-opcode"/imm32
-    68/push  "f3 0f ab  # f3/m1 0f/m2 ab/m3 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-unused-opcodes:
-    # if the instruction doesn't start with f2, f3 or 0f, don't include other opcodes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "ab/m1 cd/m2 # comment")
-    # . . push args
-    68/push  "ab/m1 cd/m2 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "ab  # f3/m1 0f/m2 ab/m3 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-unused-opcodes"/imm32
-    68/push  "ab  # ab/m1 cd/m2 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-unused-second-opcodes:
-    # if the second opcode isn't 0f, don't include further opcodes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f2/m1 ab/m2 cd/m3 # comment")
-    # . . push args
-    68/push  "f2/m1 ab/m2 cd/m3 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f2 ab  # f2/m1 ab/m2 cd/m3 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-unused-second-opcodes"/imm32
-    68/push  "f2 ab  # f2/m1 ab/m2 cd/m3 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-unused-second-opcodes-2:
-    # if the second opcode isn't 0f, don't include further opcodes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "f3/m1 ab/m2 cd/m3 # comment")
-    # . . push args
-    68/push  "f3/m1 ab/m2 cd/m3 # comment"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "f3 ab  # f3/m1 ab/m2 cd/m3 # comment", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-unused-second-opcodes"/imm32
-    68/push  "f3 ab  # f3/m1 ab/m2 cd/m3 # comment"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte:
-    # pack mod, rm32 and r32 operands into ModR/M byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 0/rm32 1/r32")
-    # . . push args
-    68/push  "8b/copy 0/mod 0/rm32 1/r32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 08  # 8b/copy 0/mod 0/rm32 1/r32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-modrm-byte"/imm32
-    68/push  "8b 08  # 8b/copy 0/mod 0/rm32 1/r32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte-with-non-zero-mod:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "01/add 3/mod/direct 3/rm32/ebx 1/r32/ecx")
-    # . . push args
-    68/push  "01/add 3/mod/direct 3/rm32/ebx 1/r32/ecx"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "out: ")
-#?     # . . push args
-#?     68/push  "out: "/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # check output
-    # . check-stream-equal(_test-output-stream, "# abcd", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-foo"/imm32
-    68/push  "01 cb  # 01/add 3/mod/direct 3/rm32/ebx 1/r32/ecx"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte-from-subop:
-    # pack mod, rm32 and subop operands into ModR/M byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "ff 6/subop/push 0/mod 0/rm32")
-    # . . push args
-    68/push  "ff 6/subop/push 0/mod 0/rm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "ff 30  # ff 6/subop/push 0/mod 0/rm32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-modrm-byte-from-subop"/imm32
-    68/push  "ff 30  # ff 6/subop/push 0/mod 0/rm32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte-with-missing-mod:
-    # pack rm32 and r32 operands into ModR/M byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/rm32 1/r32")
-    # . . push args
-    68/push  "8b/copy 0/rm32 1/r32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 08  # 8b/copy 0/rm32 1/r32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-modrm-byte-with-missing-mod"/imm32
-    68/push  "8b 08  # 8b/copy 0/rm32 1/r32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte-with-missing-rm32:
-    # pack mod and r32 operands into ModR/M byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 1/r32")
-    # . . push args
-    68/push  "8b/copy 0/mod 1/r32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 08  # 8b/copy 0/mod 1/r32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-modrm-byte-with-missing-rm32"/imm32
-    68/push  "8b 08  # 8b/copy 0/mod 1/r32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-modrm-byte-with-missing-r32:
-    # pack mod and rm32 operands into ModR/M byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 0/rm32")
-    # . . push args
-    68/push  "8b/copy 0/mod 0/rm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 00  # 8b/copy 0/mod 0/rm32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-modrm-byte-with-missing-r32"/imm32
-    68/push  "8b 00  # 8b/copy 0/mod 0/rm32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-sib-byte:
-    # pack base, index and scale operands into SIB byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 4/rm32 1/r32 0/base 1/index 0/scale")
-    # . . push args
-    68/push  "8b/copy 0/mod 4/rm32 1/r32 0/base 1/index 0/scale"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 08  # 8b/copy 0/mod 4/rm32 1/r32 0/base 1/index 0/scale", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-sib-byte"/imm32
-    68/push  "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 0/base 1/index 0/scale"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-scale:
-    # pack base, index and scale operands into SIB byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 4/rm32 1/scale")
-    # . . push args
-    68/push  "8b/copy 0/mod 4/rm32 1/scale"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 04 40  # 8b/copy 0/mod 4/rm32 1/scale", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-scale"/imm32
-    68/push  "8b 04 40  # 8b/copy 0/mod 4/rm32 1/scale"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-sib-byte-with-missing-base:
-    # pack index and scale operands into SIB byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 4/rm32 1/r32 1/index 0/scale")
-    # . . push args
-    68/push  "8b/copy 0/mod 4/rm32 1/r32 1/index 0/scale"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 1/index 0/scale", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-sib-byte-with-missing-base"/imm32
-    68/push  "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 1/index 0/scale"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-sib-byte-with-missing-index:
-    # pack base and scale operands into SIB byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 4/rm32 1/r32 0/base 0/scale")
-    # . . push args
-    68/push  "8b/copy 0/mod 4/rm32 1/r32 0/base 0/scale"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 0/base 0/scale", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-sib-byte-with-missing-index"/imm32
-    68/push  "8b 0c 00  # 8b/copy 0/mod 4/rm32 1/r32 0/base 0/scale"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-emits-sib-byte-with-missing-scale:
-    # pack base and index operands into SIB byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "8b/copy 0/mod 4/rm32 1/r32 0/base 1/index")
-    # . . push args
-    68/push  "8b/copy 0/mod 4/rm32 1/r32 0/base 1/index"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 0/base 1/index", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-emits-sib-byte-with-missing-scale"/imm32
-    68/push  "8b 0c 08  # 8b/copy 0/mod 4/rm32 1/r32 0/base 1/index"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-disp32-operand:
-    # expand /disp32 operand into 4 bytes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "e8/call 20/disp32")
-    # . . push args
-    68/push  "e8/call 20/disp32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "e8 20 00 00 00  # e8/call 20/disp32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-disp32-operand"/imm32
-    68/push  "e8 20 00 00 00  # e8/call 20/disp32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-disp16-operand:
-    # expand /disp16 operand into 2 bytes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "e8/call 20/disp16")
-    # . . push args
-    68/push  "e8/call 20/disp16"/imm32  # not a valid instruction
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "e8 20 00  # e8/call 20/disp16", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-disp16-operand"/imm32
-    68/push  "e8 20 00  # e8/call 20/disp16"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-disp8-operand:
-    # expand /disp8 operand into 1 byte
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "eb/jump 20/disp8")
-    # . . push args
-    68/push  "eb/jump 20/disp8"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "eb 20  # eb/jump 20/disp8", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-disp8-operand"/imm32
-    68/push  "eb 20  # eb/jump 20/disp8"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-disp8-name:
-    # pass /disp8 name directly through
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "eb/jump xyz/disp8")
-    # . . push args
-    68/push  "eb/jump xyz/disp8"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "eb xyz/disp8  # eb/jump xyz/disp8", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-disp8-name"/imm32
-    68/push  "eb xyz/disp8  # eb/jump xyz/disp8"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-imm32-operand:
-    # expand /imm32 operand into 4 bytes
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "68/push 0x20/imm32")
-    # . . push args
-    68/push  "68/push 0x20/imm32"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "68 20 00 00 00  # 68/push 0x20/imm32", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-imm32-operand"/imm32
-    68/push  "68 20 00 00 00  # 68/push 0x20/imm32"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-imm16-operand:
-    # expand /imm16 operand into 2 bytes
-    # we don't have one of these at the moment, so this expands to an invalid instruction
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "68/push 0x20/imm16")
-    # . . push args
-    68/push  "68/push 0x20/imm16"/imm32  # not a valid instruction
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "68 20 00  # 68/push 0x20/imm16", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-imm16-operand"/imm32
-    68/push  "68 20 00  # 68/push 0x20/imm16"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-test-convert-instruction-handles-imm8-operand:
-    # expand /imm8 operand into 1 byte
-    # we don't have one of these at the moment, so this expands to an invalid instruction
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-input-stream)
-    # . . push args
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream(_test-output-stream)
-    # . . push args
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # . clear-stream($_test-output-buffered-file->buffer)
-    # . . push args
-    68/push  $_test-output-buffered-file->buffer/imm32
-    # . . call
-    e8/call  clear-stream/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-    # initialize input
-    # . write(_test-input-stream, "68/push 0x20/imm8")
-    # . . push args
-    68/push  "68/push 0x20/imm8"/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  write/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # convert-instruction(_test-input-stream, _test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    68/push  _test-input-stream/imm32
-    # . . call
-    e8/call  convert-instruction/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check output
-    # . flush(_test-output-buffered-file)
-    # . . push args
-    68/push  _test-output-buffered-file/imm32
-    # . . call
-    e8/call  flush/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-#?     # dump output {{{
-#?     # . write(2/stderr, "^")
-#?     # . . push args
-#?     68/push  "^"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write-stream(2/stderr, _test-output-stream)
-#?     # . . push args
-#?     68/push  _test-output-stream/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write-stream/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # . write(2/stderr, "$\n")
-#?     # . . push args
-#?     68/push  "$\n"/imm32
-#?     68/push  2/imm32/stderr
-#?     # . . call
-#?     e8/call  write/disp32
-#?     # . . discard args
-#?     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-#?     # }}}
-    # . check-stream-equal(_test-output-stream, "68 20  # 68/push 0x20/imm8", msg)
-    # . . push args
-    68/push  "F - test-convert-instruction-handles-imm8-operand"/imm32
-    68/push  "68 20  # 68/push 0x20/imm8"/imm32
-    68/push  _test-output-stream/imm32
-    # . . call
-    e8/call  check-stream-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-# shortcut for parse-hex-int-from-slice(next-token-from-slice(word->start, word->end, '/'))
-parse-datum-of-word:  # word: (addr slice) -> value/eax: int
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    51/push-ecx
-    56/push-esi
-    # esi = word
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           6/r32/esi   8/disp8         .                 # copy *(ebp+8) to esi
-    # var slice/ecx: slice
-    68/push  0/imm32/end
-    68/push  0/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # slice = next-token-from-slice(word->start, word->end, '/')
-    # . . push args
-    51/push-ecx
-    68/push  0x2f/imm32/slash
-    ff          6/subop/push        1/mod/*+disp8   6/rm32/esi    .           .             .           .           4/disp8         .                 # push *(esi+4)
-    ff          6/subop/push        0/mod/indirect  6/rm32/esi    .           .             .           .           .               .                 # push *esi
-    # . . call
-    e8/call  next-token-from-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # return parse-hex-int-from-slice(slice)
-    # . . push args
-    51/push-ecx
-    # . . call
-    e8/call  parse-hex-int-from-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
-$parse-datum-of-word:end:
-    # . reclaim locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # . restore registers
-    5e/pop-to-esi
-    59/pop-to-ecx
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-# . . vim:nowrap:textwidth=0