source:
trunk/minix/lib/i86/em/em_sbi.s@
10
| Last change on this file since 10 was 9, checked in by , 14 years ago | |
|---|---|
| File size: 372 bytes | |
| Line | |
|---|---|
| 1 | .define .sbi |
| 2 | .text |
| 3 | |
| 4 | ! #bytes in cx , top of stack in ax |
| 5 | .sbi: |
| 6 | pop bx ! return subress |
| 7 | cmp cx,#2 |
| 8 | jne 1f |
| 9 | pop cx |
| 10 | sub ax,cx |
| 11 | neg ax |
| 12 | jmp (bx) |
| 13 | 1: |
| 14 | cmp cx,#4 |
| 15 | jne 9f |
| 16 | pop dx |
| 17 | pop cx |
| 18 | sub cx,ax |
| 19 | mov ax,cx |
| 20 | pop cx |
| 21 | sbb cx,dx |
| 22 | push cx |
| 23 | jmp (bx) |
| 24 | 9: |
| 25 | .extern .trpilin |
| 26 | push bx |
| 27 | jmp .trpilin |
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