diff options
| author | Kartik Agaram <vc@akkartik.com> | 2019-03-20 17:08:43 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-03-20 17:33:42 -0700 |
| commit | 4068f0ca5b3a380790794a986897815d8b6a45a8 (patch) | |
| tree | 3549ac214d5f2dfe6321ec4bc81f45b8d79b925d /subx/054string-equal.subx | |
| parent | 5c21976b5837484264b26557013e3b9264b4ee89 (diff) | |
| download | mu-4068f0ca5b3a380790794a986897815d8b6a45a8.tar.gz | |
5011
New convention: compare 'with' for asymmetric comparisons (greater or lesser than), and compare 'and' for symmetric comparisons. Worth making this distinction even though the opcodes are identical; when we compare 'with', the order of operands is significant.
Diffstat (limited to 'subx/054string-equal.subx')
| -rw-r--r-- | subx/054string-equal.subx | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/subx/054string-equal.subx b/subx/054string-equal.subx index e2df6019..d85ec33d 100644 --- a/subx/054string-equal.subx +++ b/subx/054string-equal.subx @@ -52,7 +52,7 @@ string-equal?: # s : (address string), benchmark : (address string) -> EAX : bo 8b/copy 0/mod/indirect 6/rm32/ESI . . . 2/r32/EDX . . # copy *ESI to EDX $string-equal?:lengths: # if (lens != benchmark->length) return false - 39/compare 0/mod/indirect 7/rm32/EDI . . . 2/r32/EDX . . # compare *EDI with EDX + 39/compare 0/mod/indirect 7/rm32/EDI . . . 2/r32/EDX . . # compare *EDI and EDX 75/jump-if-not-equal $string-equal?:false/disp8 # currs/ESI = s->data 81 0/subop/add 3/mod/direct 6/rm32/ESI . . . . . 4/imm32 # add to ESI @@ -71,7 +71,7 @@ $string-equal?:loop: # c2 = *currb 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 with EBX + 39/compare 3/mod/direct 0/rm32/EAX . . . 3/r32/EBX . . # compare EAX and EBX 75/jump-if-not-equal $string-equal?:false/disp8 # ++i 41/inc-ECX |