source:
trunk/minix/lib/i386/em/em_xor.s@
9
| Last change on this file since 9 was 9, checked in by , 15 years ago | |
|---|---|
| File size: 239 bytes | |
| Line | |
|---|---|
| 1 | .sect .text; .sect .rom; .sect .data; .sect .bss |
| 2 | .sect .text |
| 3 | .define .xor |
| 4 | |
| 5 | ! #bytes in ecx |
| 6 | .xor: |
| 7 | pop ebx ! return address |
| 8 | mov edx,edi |
| 9 | mov edi,esp |
| 10 | add edi,ecx |
| 11 | sar ecx,2 |
| 12 | 1: |
| 13 | pop eax |
| 14 | xor eax,(edi) |
| 15 | stos |
| 16 | loop 1b |
| 17 | mov edi,edx |
| 18 | jmp ebx |
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