diff options
Diffstat (limited to 'subx/apps/subx-common.subx')
| -rw-r--r-- | subx/apps/subx-common.subx | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/subx/apps/subx-common.subx b/subx/apps/subx-common.subx index 1dac1c31..8088733f 100644 --- a/subx/apps/subx-common.subx +++ b/subx/apps/subx-common.subx @@ -1322,6 +1322,81 @@ $test-compute-width:no-metadata: 5d/pop-to-EBP c3/return +is-label?: # word : (address slice) -> EAX : boolean + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + # ECX = word + 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 1/r32/ECX 8/disp8 . # copy *(EBP+8) to ECX + # ECX = word->end + 8b/copy 1/mod/*+disp8 1/rm32/ECX . . . 1/r32/ECX 4/disp8 . # copy *(ECX+4) to ECX + # *(word->end - 1) == ':' + # . EAX = 0 + 31/xor 3/mod/direct 0/rm32/EAX . . . 0/r32/EAX . . # clear EAX + # . EAX = *((char *) word->end - 1) + 8a/copy-byte 1/mod/*+disp8 1/rm32/ECX . . . 0/r32/AL -1/disp8 . # copy byte at *(ECX-1) to AL + # . (word->end - 1)/EAX == ':' + 3d/compare-EAX-and 3A/imm32/colon + b8/copy-to-EAX 1/imm32/true + 74/jump-if-equal $is-label?:end/disp8 + b8/copy-to-EAX 0/imm32/false +$is-label?:end: + # . restore registers + 59/pop-to-ECX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-is-label?: + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP +$test-is-label?:true: + # var slice/ECX = slice("AAA:") + 68/push _test-label-slice-end1/imm32 + 68/push _test-label-slice-start/imm32 + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # is-label?(slice/ECX) + 51/push-ECX + e8/call is-label?/disp32 + # . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-is-label?:true"/imm32 + 68/push 1/imm32 + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP +$test-is-label?:false: + # var slice/ECX = slice("AAA") + 68/push _test-label-slice-end2/imm32 + 68/push _test-label-slice-start/imm32 + 89/copy 3/mod/direct 1/rm32/ECX . . . 4/r32/ESP . . # copy ESP to ECX + # is-label?(slice/ECX) + 51/push-ECX + e8/call is-label?/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-is-label?: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 + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + == data _test-input-stream: @@ -1408,4 +1483,12 @@ _test-data-segment: 64/d 61/a 74/t 61/a _test-data-segment-end: +_test-label-slice-start: + 41/A + 41/A + 41/A +_test-label-slice-end2: + 3A/: +_test-label-slice-end1: + # . . vim:nowrap:textwidth=0 |