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| author | Kartik Agaram <vc@akkartik.com> | 2019-04-06 00:08:32 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-04-06 00:08:32 -0700 |
| commit | 577281f64b5e6b7e2ef4a78fb6bc44274caedcb0 (patch) | |
| tree | 8cbd86c4192bcf9e0c967fed43630e4d4822c754 /subx/072slice.subx | |
| parent | 615a7e957535dabeac826674859e33a01ed2bab4 (diff) | |
| download | mu-577281f64b5e6b7e2ef4a78fb6bc44274caedcb0.tar.gz | |
5060
Diffstat (limited to 'subx/072slice.subx')
| -rw-r--r-- | subx/072slice.subx | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/subx/072slice.subx b/subx/072slice.subx index 8e151ecf..a795e608 100644 --- a/subx/072slice.subx +++ b/subx/072slice.subx @@ -97,6 +97,7 @@ test-slice-empty-false: slice-equal?: # s : (address slice), p : (address string) -> EAX : boolean # pseudocode: + # if (p == 0) return (s == 0) # currs = s->start # maxs = s->end # if (maxs - currs != p->length) return false @@ -128,11 +129,20 @@ slice-equal?: # s : (address slice), p : (address string) -> EAX : boolean 8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX # maxs/ESI = s->end 8b/copy 1/mod/*+disp8 6/rm32/ESI . . . 6/r32/ESI 4/disp8 . # copy *(ESI+4) to ESI - # EBX = p - 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 3/r32/EBX 0xc/disp8 . # copy *(EBP+12) to EBX # EAX = 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-not-equal $slice-equal?:nonnull-string/disp8 +$slice-equal?:null-string: + # return s->start == s->end + 3d/compare-EAX-and 0/imm32 + 74/jump-if-equal $slice-equal?:true/disp8 + eb/jump $slice-equal?:false/disp8 +$slice-equal?:nonnull-string: # if (EAX != p->length) return false 39/compare 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # compare *EBX and EAX 75/jump-if-not-equal $slice-equal?:false/disp8 @@ -390,6 +400,37 @@ test-slice-equal-empty-with-empty: 5d/pop-to-EBP c3/return +test-slice-equal-with-null: + # - slice-equal?(slice("Ab"), null) == 0 + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # var slice/ECX + 68/push _test-slice-data-2/imm32/end + 68/push _test-slice-data-0/imm32/start + 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 + # . epilog + 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 : (address slice), head : (address string) -> EAX : boolean # pseudocode # lenh = head->length @@ -800,6 +841,10 @@ slice-to-string: # ad : (address allocation-descriptor), in : (address slice) - 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 = in 8b/copy 1/mod/*+disp8 5/rm32/EBP . . . 6/r32/ESI 0xc/disp8 . # copy *(EBP+12) to ESI # curr/EDX = in->start @@ -843,8 +888,11 @@ slice-to-string: # ad : (address allocation-descriptor), in : (address slice) - # restore out (assumes _append-4 can't error) 58/pop-to-EAX $slice-to-string:end: - # . reclaim locals # . restore registers + 5e/pop-to-ESI + 5b/pop-to-EBX + 5a/pop-to-EDX + 59/pop-to-ECX # . epilog 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP 5d/pop-to-EBP |