about summary refs log tree commit diff stats
path: root/baremetal/123slice.subx
diff options
context:
space:
mode:
Diffstat (limited to 'baremetal/123slice.subx')
-rw-r--r--baremetal/123slice.subx1069
1 files changed, 0 insertions, 1069 deletions
diff --git a/baremetal/123slice.subx b/baremetal/123slice.subx
deleted file mode 100644
index 01c29290..00000000
--- a/baremetal/123slice.subx
+++ /dev/null
@@ -1,1069 +0,0 @@
-# new data structure: a slice is an open interval of addresses [start, end)
-# that includes 'start' but not 'end'
-
-== 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
-
-slice-empty?:  # s: (addr slice) -> result/eax: boolean
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    51/push-ecx
-    # ecx = s
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           1/r32/ecx   8/disp8         .                 # copy *(ebp+8) to ecx
-    # if (s->start >= s->end) return true
-    # . eax = s->start
-    8b/copy                         0/mod/indirect  1/rm32/ecx    .           .             .           0/r32/eax   .               .                 # copy *ecx to eax
-    # . if (eax >= s->end) return true
-    3b/compare                      1/mod/*+disp8   1/rm32/ecx    .           .             .           0/r32/eax   4/disp8         .                 # compare eax with *(ecx+4)
-    b8/copy-to-eax  1/imm32/true
-    73/jump-if-addr>=  $slice-empty?:end/disp8
-    b8/copy-to-eax  0/imm32/false
-$slice-empty?:end:
-    # . restore registers
-    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
-
-test-slice-empty-true:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # var slice/ecx: slice = {34, 34}
-    68/push  34/imm32/end
-    68/push  34/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # slice-empty?(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
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-empty-true"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-empty-false:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # var slice/ecx: slice = {32, 34}
-    68/push  34/imm32/end
-    68/push  32/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # slice-empty?(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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-empty-false"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-empty-if-start-greater-than-end:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # var slice/ecx: slice = {34, 32}
-    68/push  32/imm32/end
-    68/push  34/imm32/start
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # slice-empty?(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
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-empty-if-start-greater-than-end"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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
-
-slice-equal?:  # s: (addr slice), p: (addr array byte) -> result/eax: boolean
-    # pseudocode:
-    #   if (p == 0) return (s == 0)
-    #   currs = s->start
-    #   maxs = s->end
-    #   if (maxs - currs != p->size) return false
-    #   currp = p->data
-    #   while currs < maxs
-    #     if (*currs != *currp) return false
-    #     ++currs
-    #     ++currp
-    #   return true
-    #
-    # registers:
-    #   currs: edx
-    #   maxs: esi
-    #   currp: ebx
-    #   *currs: eax
-    #   *currp: ecx
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    56/push-esi
-    # esi = s
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           6/r32/esi   8/disp8         .                 # copy *(ebp+8) to esi
-    # var currs/edx: (addr byte) = s->start
-    8b/copy                         0/mod/indirect  6/rm32/esi    .           .             .           2/r32/edx   .               .                 # copy *esi to edx
-    # var maxs/esi: (addr byte) = s->end
-    8b/copy                         1/mod/*+disp8   6/rm32/esi    .           .             .           6/r32/esi   4/disp8         .                 # copy *(esi+4) to esi
-    # var ssize/eax: int = maxs - currs
-    89/copy                         3/mod/direct    0/rm32/eax    .           .             .           6/r32/esi   .               .                 # copy esi to eax
-    29/subtract                     3/mod/direct    0/rm32/eax    .           .             .           2/r32/edx   .               .                 # subtract edx from eax
-    # ebx = p
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           3/r32/ebx   0xc/disp8       .                 # copy *(ebp+12) to ebx
-    # if (p != 0) goto next check
-    81          7/subop/compare     3/mod/direct    3/rm32/ebx    .           .             .           .           .               0/imm32           # compare ebx
-    75/jump-if-!=  $slice-equal?:nonnull-string/disp8
-$slice-equal?:null-string:
-    # return s->start == s->end
-    3d/compare-eax-and  0/imm32
-    74/jump-if-=  $slice-equal?:true/disp8
-    eb/jump  $slice-equal?:false/disp8
-$slice-equal?:nonnull-string:
-    # if (ssize != p->size) return false
-    39/compare                      0/mod/indirect  3/rm32/ebx    .           .             .           0/r32/eax   .               .                 # compare *ebx and eax
-    75/jump-if-!=  $slice-equal?:false/disp8
-    # var currp/ebx: (addr byte) = p->data
-    81          0/subop/add         3/mod/direct    3/rm32/ebx    .           .             .           .           .               4/imm32           # add to ebx
-    # var c1/eax: byte = 0
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    # var c2/ecx: byte = 0
-    31/xor                          3/mod/direct    1/rm32/ecx    .           .             .           1/r32/ecx   .               .                 # clear ecx
-$slice-equal?:loop:
-    # if (currs >= maxs) return true
-    39/compare                      3/mod/direct    2/rm32/edx    .           .             .           6/r32/esi   .               .                 # compare edx with esi
-    73/jump-if-addr>=  $slice-equal?:true/disp8
-    # c1 = *currp
-    8a/copy-byte                    0/mod/indirect  3/rm32/ebx    .           .             .           0/r32/AL    .               .                 # copy byte at *ebx to AL
-    # c2 = *currs
-    8a/copy-byte                    0/mod/indirect  2/rm32/edx    .           .             .           1/r32/CL    .               .                 # copy byte at *edx to CL
-    # if (c1 != c2) return false
-    39/compare                      3/mod/direct    0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # compare eax and ecx
-    75/jump-if-!=  $slice-equal?:false/disp8
-    # ++currp
-    43/increment-ebx
-    # ++currs
-    42/increment-edx
-    eb/jump $slice-equal?:loop/disp8
-$slice-equal?:false:
-    b8/copy-to-eax  0/imm32
-    eb/jump  $slice-equal?:end/disp8
-$slice-equal?:true:
-    b8/copy-to-eax  1/imm32
-$slice-equal?:end:
-    # . restore registers
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    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
-
-test-slice-equal:
-    # - slice-equal?(slice("Abc"), "Abc") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/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
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-equal"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-false:
-    # - slice-equal?(slice("bcd"), "Abc") == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "bcd"
-    b8/copy-to-eax  "bcd"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-false"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-too-long:
-    # - slice-equal?(slice("Abcd"), "Abc") == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abcd"
-    b8/copy-to-eax  "Abcd"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-too-long"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-too-short:
-    # - slice-equal?(slice("A"), "Abc") == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "A"
-    b8/copy-to-eax  "A"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-too-short"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-empty:
-    # - slice-equal?(slice(""), "Abc") == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # 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
-    # eax = slice-equal?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-empty"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-with-empty:
-    # - slice-equal?(slice("Ab"), "") == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Ab"
-    b8/copy-to-eax  "Ab"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, "")
-    # . . push args
-    68/push  ""/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-with-empty"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-empty-with-empty:
-    # - slice-equal?(slice(""), "") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # 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
-    # eax = slice-equal?(ecx, "")
-    # . . push args
-    68/push  ""/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
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-empty-with-empty"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-equal-with-null:
-    # - slice-equal?(slice("Ab"), null) == 0
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Ab"
-    b8/copy-to-eax  "Ab"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-equal?(ecx, 0)
-    # . . push args
-    68/push  0/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
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-equal-with-null"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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
-
-slice-starts-with?:  # s: (addr slice), head: (addr array byte) -> result/eax: boolean
-    # pseudocode
-    #   hsize = head->size
-    #   if (hsize > s->end - s->start) return false
-    #   i = 0
-    #   currs = s->start
-    #   currp = head->data
-    #   while i < hsize
-    #     if (*currs != *currh) return false
-    #     ++i
-    #     ++currs
-    #     ++currh
-    #   return true
-    #
-    # registers:
-    #   currs: esi
-    #   currh: edi
-    #   *currs: eax
-    #   *currh: ebx
-    #   i: ecx
-    #   hsize: edx
-    #
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # . save registers
-    51/push-ecx
-    52/push-edx
-    53/push-ebx
-    56/push-esi
-    57/push-edi
-    # esi = s
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           6/r32/esi   8/disp8         .                 # copy *(ebp+8) to esi
-    # var lens/ecx: int = s->end - s->start
-    8b/copy                         1/mod/*+disp8   6/rm32/esi    .           .             .           1/r32/ecx   4/disp8         .                 # copy *(esi+4) to ecx
-    2b/subtract                     0/mod/indirect  6/rm32/esi    .           .             .           1/r32/ecx   .               .                 # subtract *esi from ecx
-    # edi = head
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           7/r32/edi   0xc/disp8       .                 # copy *(ebp+12) to edi
-    # var hsize/edx: int = head->size
-    8b/copy                         0/mod/indirect  7/rm32/edi    .           .             .           2/r32/edx   .               .                 # copy *edi to edx
-    # if (hsize > lens) return false
-    39/compare                      3/mod/direct    2/rm32/edx    .           .             .           1/r32/ecx   .               .                 # compare edx with ecx
-    7f/jump-if->  $slice-starts-with?:false/disp8
-    # var currs/esi: (addr byte) = s->start
-    8b/subtract                     0/mod/indirect  6/rm32/esi    .           .             .           6/r32/esi   .               .                 # copy *esi to esi
-    # var currh/edi: (addr byte) = head->data
-    81          0/subop/add         3/mod/direct    7/rm32/edi    .           .             .           .           .               4/imm32           # add to edi
-    # var i/ecx: int = 0
-    31/xor                          3/mod/direct    1/rm32/ecx    .           .             .           1/r32/ecx   .               .                 # clear ecx
-    # var c1/eax: byte = 0
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    # var c2/ebx: byte = 0
-    31/xor                          3/mod/direct    3/rm32/ebx    .           .             .           3/r32/ebx   .               .                 # clear ebx
-$slice-starts-with?:loop:
-    # if (i >= hsize) return true
-    39/compare                      3/mod/direct    1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # compare ecx with edx
-    7d/jump-if->=  $slice-starts-with?:true/disp8
-    # c1 = *currs
-    8a/copy-byte                    0/mod/indirect  6/rm32/esi    .           .             .           0/r32/AL    .               .                 # copy byte at *esi to AL
-    # c2 = *currh
-    8a/copy-byte                    0/mod/indirect  7/rm32/edi    .           .             .           3/r32/BL    .               .                 # copy byte at *edi to BL
-    # if (c1 != c2) return false
-    39/compare                      3/mod/direct    0/rm32/eax    .           .             .           3/r32/ebx   .               .                 # compare eax and ebx
-    75/jump-if-!=  $slice-starts-with?:false/disp8
-    # ++i
-    41/increment-ecx
-    # ++currs
-    46/increment-esi
-    # ++currh
-    47/increment-edi
-    eb/jump $slice-starts-with?:loop/disp8
-$slice-starts-with?:true:
-    b8/copy-to-eax  1/imm32
-    eb/jump  $slice-starts-with?:end/disp8
-$slice-starts-with?:false:
-    b8/copy-to-eax  0/imm32
-$slice-starts-with?:end:
-    # . restore registers
-    5f/pop-to-edi
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    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
-
-test-slice-starts-with-single-character:
-    # - slice-starts-with?(slice("Abc"), "A") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "A")
-    # . . push args
-    68/push  "A"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-single-character"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-starts-with-empty-string:
-    # - slice-starts-with?(slice("Abc"), "") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "")
-    # . . push args
-    68/push  ""/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-empty-string"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-starts-with-multiple-characters:
-    # - slice-starts-with?(slice("Abc"), "Ab") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "Ab")
-    # . . push args
-    68/push  "Ab"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-multiple-characters"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-starts-with-entire-string:
-    # - slice-starts-with?(slice("Abc"), "Abc") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "Abc")
-    # . . push args
-    68/push  "Abc"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-entire-string"/imm32
-    68/push  1/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-starts-with-fails:
-    # - slice-starts-with?(slice("Abc"), "Abd") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "Abd")
-    # . . push args
-    68/push  "Abd"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-fails"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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-slice-starts-with-fails-2:
-    # - slice-starts-with?(slice("Abc"), "Ac") == 1
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # eax = slice-starts-with?(ecx, "Ac")
-    # . . push args
-    68/push  "Ac"/imm32
-    51/push-ecx
-    # . . call
-    e8/call  slice-starts-with?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 0, msg)
-    # . . push args
-    68/push  "F - test-slice-starts-with-fails-2"/imm32
-    68/push  0/imm32
-    50/push-eax
-    # . . call
-    e8/call  check-ints-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
-
-# write a slice to a stream
-# abort if the stream doesn't have enough space
-write-slice:  # out: (addr stream byte), s: (addr slice)
-    # . 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
-    # esi = s
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           6/r32/esi   0xc/disp8       .                 # copy *(ebp+12) to esi
-    # var curr/ecx: (addr byte) = s->start
-    8b/copy                         0/mod/indirect  6/rm32/esi    .           .             .           1/r32/ecx   .               .                 # copy *esi to ecx
-    # var max/esi: (addr byte) = s->end
-    8b/copy                         1/mod/*+disp8   6/rm32/esi    .           .             .           6/r32/esi   4/disp8         .                 # copy *(esi+4) to esi
-    # edi = out
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .                         7/r32/edi   8/disp8         .                 # copy *(ebp+8) to edi
-    # edx = out->size
-    8b/copy                         1/mod/*+disp8   7/rm32/edi    .           .             .           2/r32/edx   8/disp8         .                 # copy *(edi+8) to edx
-    # ebx = out->write
-    8b/copy                         0/mod/indirect  7/rm32/edi    .           .             .           3/r32/ebx   .               .                 # copy *edi to ebx
-$write-slice:loop:
-    # if (curr >= max) break
-    39/compare                      3/mod/direct    1/rm32/ecx    .           .             .           6/r32/esi   .               .                 # compare ecx with esi
-    73/jump-if-addr>=  $write-slice:loop-end/disp8
-    # if (out->write >= out->size) abort
-    39/compare                      3/mod/direct    3/rm32/ebx    .           .             .           2/r32/edx   .               .                 # compare ebx with edx
-    7d/jump-if->=  $write-slice:abort/disp8
-    # out->data[out->write] = *in
-    # . AL = *in
-    31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
-    8a/copy-byte                    0/mod/indirect  1/rm32/ecx    .           .             .           0/r32/AL    .               .                 # copy byte at *ecx to AL
-    # . out->data[out->write] = AL
-    88/copy-byte                    1/mod/*+disp8   4/rm32/sib    7/base/edi  3/index/ebx   .           0/r32/AL    0xc/disp8       .                 # copy AL to *(edi+ebx+12)
-    # ++out->write
-    43/increment-ebx
-    # ++in
-    41/increment-ecx
-    eb/jump  $write-slice:loop/disp8
-$write-slice:loop-end:
-    # persist out->write
-    89/copy                         0/mod/indirect  7/rm32/edi    .           .             .           3/r32/ebx   .               .                 # copy ebx to *edi
-$write-slice:end:
-    # . restore registers
-    5f/pop-to-edi
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-$write-slice:abort:
-    (draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0 "write-slice: out of space" 3 0)  # 3=cyan
-    {
-      eb/jump loop/disp8
-    }
-    # never gets here
-
-test-write-slice:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # setup
-    # . clear-stream(_test-stream)
-    # . . push args
-    68/push  _test-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
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # write-slice(_test-stream, slice)
-    # . . push args
-    51/push-ecx
-    68/push  _test-stream/imm32
-    # . . call
-    e8/call  write-slice/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-stream-equal(_test-stream, "Abc", msg)
-    # . . push args
-    68/push  "F - test-write-slice"/imm32
-    68/push  "Abc"/imm32
-    68/push  _test-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
-
-# copy a slice into a new (dynamically allocated) string
-slice-to-string:  # ad: (addr allocation-descriptor), in: (addr slice), out: (addr handle array byte)
-    # . 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
-    # esi = in
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           6/r32/esi   0xc/disp8       .                 # copy *(ebp+12) to esi
-    # var curr/edx: (addr byte) = in->start
-    8b/copy                         0/mod/indirect  6/rm32/esi    .           .             .           2/r32/edx   .               .                 # copy *esi to edx
-    # var max/ebx: (addr byte) = in->end
-    8b/copy                         1/mod/*+disp8   6/rm32/esi    .           .             .           3/r32/ebx   4/disp8         .                 # copy *(esi+4) to ebx
-    # var size/ecx: int = max - curr + 4  # total size of output string (including the initial 'size' field)
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           3/r32/ebx   .               .                 # copy ebx to ecx
-    29/subtract                     3/mod/direct    1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # subtract edx from ecx
-    81          0/subop/add         3/mod/direct    1/rm32/ecx    .           .             .           .           .               4/imm32           # add to ecx
-    # allocate(ad, size, out)
-    # . . push args
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           0x10/disp8      .                 # push *(ebp+16)
-    51/push-ecx
-    ff          6/subop/push        1/mod/*+disp8   5/rm32/ebp    .           .             .           .           8/disp8         .                 # push *(ebp+8)
-    # . . call
-    e8/call  allocate/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # eax = out->payload
-    8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           0/r32/eax   0x10/disp8      .                 # copy *(ebp+16) to eax
-    8b/copy                         1/mod/*+disp8   0/rm32/eax    .           .             .           0/r32/eax   4/disp8         .                 # copy *(eax+4) to eax
-    # skip payload->allocid
-    05/add-to-eax  4/imm32
-    # if (eax == 0) abort
-    3d/compare-eax-and  0/imm32
-    74/jump-if-=  $slice-to-string:abort/disp8
-    # out->size = size-4
-    89/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy ecx to *eax
-    81          5/subop/subtract    0/mod/indirect  0/rm32/eax    .           .             .           .           .               4/imm32           # subtract 4 from *eax
-    # save out
-    50/push-eax
-$slice-to-string:initialize:
-    # eax = _append-4(eax+4, eax+size, curr, max)  # clobbering ecx
-    # . . push args
-    53/push-ebx
-    52/push-edx
-    # . . push eax+size (clobbering ecx)
-    01/add                          3/mod/direct    1/rm32/ecx    .           .             .           0/r32/eax   .               .                 # add eax to ecx
-    51/push-ecx
-    # . . push eax+4 (clobbering eax)
-    81          0/subop/add         3/mod/direct    0/rm32/eax    .           .             .           .           .               4/imm32           # add to eax
-    50/push-eax
-    # . . call
-    e8/call  _append-4/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x10/imm32        # add to esp
-    # restore out (assumes _append-4 can't error)
-    58/pop-to-eax
-$slice-to-string:end:
-    # . restore registers
-    5e/pop-to-esi
-    5b/pop-to-ebx
-    5a/pop-to-edx
-    59/pop-to-ecx
-    58/pop-to-eax
-    # . epilogue
-    89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
-    5d/pop-to-ebp
-    c3/return
-
-$slice-to-string:abort:
-    (draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0 "slice-to-string: out of space\n" 3 0)  # 3=cyan
-    {
-      eb/jump loop/disp8
-    }
-    # never gets here
-
-test-slice-to-string:
-    # . prologue
-    55/push-ebp
-    89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
-    # var ad/edx: allocation-descriptor containing 16 bytes
-    # . var end/ecx: (addr byte)
-    89/<- %ecx 4/r32/esp
-    81 5/subop/subtract %esp 0x10/imm32
-    # . var start/edx: (addr byte) = end - 0x10
-    89/<- %edx 4/r32/esp
-    # . ad = {start, end}
-    51/push-ecx
-    52/push-edx
-    89/copy                         3/mod/direct    2/rm32/edx    .           .             .           4/r32/esp   .               .                 # copy esp to edx
-    # (eax..ecx) = "Abc"
-    b8/copy-to-eax  "Abc"/imm32
-    8b/copy                         0/mod/indirect  0/rm32/eax    .           .             .           1/r32/ecx   .               .                 # copy *eax to ecx
-    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/eax  1/index/ecx   .           1/r32/ecx   4/disp8         .                 # copy eax+ecx+4 to ecx
-    05/add-to-eax  4/imm32
-    # var slice/ecx: slice = {eax, ecx}
-    51/push-ecx
-    50/push-eax
-    89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
-    # var h/ebx: (handle array byte)
-    68/push  0/imm32
-    68/push  0/imm32
-    89/copy                         3/mod/direct    3/rm32/ebx    .           .             .           4/r32/esp   .               .                 # copy esp to ebx
-    # slice-to-string(ad, slice, h)
-    # . . push args
-    53/push-ebx
-    51/push-ecx
-    52/push-edx
-    # . . call
-    e8/call  slice-to-string/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # eax = h->payload
-    8b/copy                         1/mod/*+disp8   3/rm32/ebx    .           .             .           0/r32/eax   4/disp8         .                 # copy *(ebx+4) to eax
-    # skip payload->allocid
-    05/add-to-eax  4/imm32
-#?     # dump eax {{{
-#?     # . 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
-#?     # . write(2/stderr, eax)
-#?     # . . push args
-#?     50/push-eax
-#?     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(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
-#?     # }}}
-    # eax = string-equal?(eax, "Abc")
-    # . . push args
-    68/push  "Abc"/imm32
-    50/push-eax
-    # . . call
-    e8/call  string-equal?/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
-    # check-ints-equal(eax, 1, msg)
-    # . . push args
-    68/push  "F - test-slice-to-string"/imm32
-    68/push  1/imm32/true
-    50/push-eax
-    # . . call
-    e8/call  check-ints-equal/disp32
-    # . . discard args
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
-    # . reclaim locals
-    81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0x18/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
-
-# . . vim:nowrap:textwidth=0