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# Generate code for a new function called 'run-tests' which calls in sequence
# all functions starting with 'test-'.
#
# To build:
# $ ./subx translate init.linux 0*.subx apps/subx-params.subx apps/tests.subx -o apps/tests
== 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
# initialize-trace-stream(256KB)
# . . push args
68/push 0x40000/imm32/256KB
# . . call
e8/call initialize-trace-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# - if argc > 1 and argv[1] == "test", then return run_tests()
# if (argc <= 1) goto run-main
81 7/subop/compare 1/mod/*+disp8 5/rm32/ebp . . . . 0/disp8 1/imm32 # compare *ebp
7e/jump-if-<= $subx-tests-main:interactive/disp8
# if (!kernel-string-equal?(argv[1], "test")) goto run-main
# . 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 run-main
3d/compare-eax-and 0/imm32/false
74/jump-if-= $subx-tests-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-tests-main:end/disp8
$subx-tests-main:interactive:
# - otherwise convert stdin
# subx-gen-run-tests(Stdin, Stdout)
# . . push args
68/push Stdout/imm32
68/push Stdin/imm32
# . . call
e8/call subx-gen-run-tests/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# syscall(exit, 0)
bb/copy-to-ebx 0/imm32
$subx-tests-main:end:
b8/copy-to-eax 1/imm32/exit
cd/syscall 0x80/imm8
subx-gen-run-tests: # in: (addr buffered-file), out: (addr buffered-file)
# pseudocode
# boolean tests-found = false
# var line: (stream byte 512)
# var new-code-segment: (handle stream byte) = new-stream(Segment-size, 1)
# write(new-code-segment, "\n== code\n")
# write(new-code-segment, "run-tests:\n")
# 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 is-label?(word-slice)
# if slice-starts-with?(word-slice, "test-")
# tests-found = true
# write(new-code-segment, " e8/call ")
# write-slice(new-code-segment, word-slice)
# write(new-code-segment, "/disp32\n")
# rewind-stream(line)
# write-stream-data(out, line)
# if tests-found
# write(new-code-segment, " c3/return\n")
# write-stream-data(out, new-code-segment)
# 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
57/push-edi
# 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
# tests-found?/ebx = false
31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx
# new-code-segment/edi = new-stream(Heap, Segment-size, 1)
# . eax = new-stream(Heap, Segment-size, 1)
# . . push args
68/push 1/imm32
ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Segment-size/disp32 # push *Segment-size
68/push Heap/imm32
# . . call
e8/call new-stream/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
# . edi = eax
89/copy 3/mod/direct 7/rm32/edi . . . 0/r32/eax . . # copy eax to edi
# write(new-code-segment, "\n== code\n")
# . . push args
68/push "\n== code\n"/imm32
57/push-edi
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# write(new-code-segment, "run-tests:\n")
# . . push args
68/push "run-tests:\n"/imm32
57/push-edi
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
$subx-gen-run-tests: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-gen-run-tests: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-gen-run-tests:break/disp32
# 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-gen-run-tests:check-for-label:
# if (!is-label?(word-slice)) continue
# . eax = is-label?(word-slice)
# . . push args
52/push-edx
# . . call
e8/call is-label?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
# . if (eax == false) continue
3d/compare-eax-and 0/imm32/false
74/jump-if-= $subx-gen-run-tests:continue/disp8
$subx-gen-run-tests:check-label-prefix:
# strip trailing ':' from word-slice
ff 1/subop/decrement 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # decrement *(edx+4)
# if !slice-starts-with?(word-slice, "test-") continue
# . . push args
68/push "test-"/imm32
52/push-edx
# . . call
e8/call slice-starts-with?/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# . if (eax == false) break
3d/compare-eax-and 0/imm32/false
74/jump-if-= $subx-gen-run-tests:continue/disp8
$subx-gen-run-tests:call-test-function:
# tests-found? = true
bb/copy-to-ebx 1/imm32/true
# write(new-code-segment, " e8/call ")
# . . push args
68/push " e8/call "/imm32
57/push-edi
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# write-slice(new-code-segment, word-slice)
# . . push args
52/push-edx
57/push-edi
# . . call
e8/call write-slice/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# write(new-code-segment, "/disp32\n")
# . . push args
68/push "/disp32\n"/imm32
57/push-edi
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
$subx-gen-run-tests:continue:
# 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
# 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-gen-run-tests:loop/disp32
$subx-gen-run-tests:break:
# if (!tests-found?) goto end
81 7/subop/compare 3/mod/direct 3/rm32/ebx . . . . . 0/imm32/false # compare ebx
74/jump-if-= $subx-gen-run-tests:end/disp8
# write(new-code-segment, " c3/return\n")
# . . push args
68/push " c3/return\n"/imm32
57/push-edi
# . . call
e8/call write/disp32
# . . discard args
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# write-stream-data(out, new-code-segment)
# . . push args
57/push-edi
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
$subx-gen-run-tests:end:
# 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
# . reclaim locals
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x214/imm32 # add to esp
# . restore registers
5f/pop-to-edi
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
# . . vim:nowrap:textwidth=0
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