source:
trunk/minix/lib/i86/em/em_dup.s@
9
| Last change on this file since 9 was 9, checked in by , 13 years ago | |
|---|---|
| File size: 177 bytes | |
| Line | |
|---|---|
| 1 | .define .dup |
| 2 | |
| 3 | ! #bytes in cx |
| 4 | .text |
| 5 | .dup: |
| 6 | pop bx ! return address |
| 7 | mov ax,si |
| 8 | mov dx,di |
| 9 | mov si,sp |
| 10 | sub sp,cx |
| 11 | mov di,sp |
| 12 | sar cx,#1 |
| 13 | rep |
| 14 | mov |
| 15 | mov si,ax |
| 16 | mov di,dx |
| 17 | jmp (bx) |
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