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| author | Kartik Agaram <vc@akkartik.com> | 2019-07-27 16:01:55 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-07-27 17:47:59 -0700 |
| commit | 6e1eeeebfb453fa7c871869c19375ce60fbd7413 (patch) | |
| tree | 539c4a3fdf1756ae79770d5c4aaf6366f1d1525e /051test.subx | |
| parent | 8846a7f85cc04b77b2fe8a67b6d317723437b00c (diff) | |
| download | mu-6e1eeeebfb453fa7c871869c19375ce60fbd7413.tar.gz | |
5485 - promote SubX to top-level
Diffstat (limited to '051test.subx')
| -rw-r--r-- | 051test.subx | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/051test.subx b/051test.subx new file mode 100644 index 00000000..6f8cda7a --- /dev/null +++ b/051test.subx @@ -0,0 +1,93 @@ +# Rudimentary test harness + +== 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: # manual test + # check-ints-equal(34, 34) + # . . push args + 68/push "error in check-ints-equal"/imm32 + 68/push 34/imm32 + 68/push 34/imm32 + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # syscall(exit, 0) + bb/copy-to-EBX 0/imm32 + b8/copy-to-EAX 1/imm32/exit + cd/syscall 0x80/imm8 + +# print msg to stderr if a != b, otherwise print "." +check-ints-equal: # (a : int, b : int, msg : (address array byte)) -> <void> + # . prolog + 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 + 53/push-EBX + # load first 2 args into EAX and EBX + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 0/r32/EAX 8/disp8 . # copy *(EBP+8) to EAX + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 0xc/disp8 . # copy *(EBP+12) to EBX + # if (EAX == EBX) success + 39/compare 3/mod/direct 0/rm32/EAX . . . 3/r32/EBX . . # compare EAX and EBX + 75/jump-if-unequal $check-ints-equal:else/disp8 + # . _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 + # . return + eb/jump $check-ints-equal:end/disp8 + # otherwise print error message +$check-ints-equal:else: + # . _write(2/stderr, msg) + # . . push args + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 0x10/disp8 . # copy *(EBP+16) to ECX + 51/push-ECX + 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, Newline) + # . . push args + 68/push Newline/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 + # increment Num-test-failures + ff 0/subop/increment 0/mod/indirect 5/rm32/.disp32 . . . Num-test-failures/disp32 # increment *Num-test-failures +$check-ints-equal:end: + # . restore registers + 5b/pop-to-EBX + 59/pop-to-ECX + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +== data + +# length-prefixed string containing just a single newline +# convenient to have when printing messages and so on +Newline: + # size + 1/imm32 + # data + 0a/newline + +# every test failure increments this counter +Num-test-failures: + 0/imm32 + +# . . vim:nowrap:textwidth=0 |