source:
trunk/minix/lib/i86/em/em_cmu4.s@
10
| Last change on this file since 10 was 9, checked in by , 15 years ago | |
|---|---|
| File size: 285 bytes | |
| Rev | Line | |
|---|---|---|
| [9] | 1 | .define .cmu4 |
| 2 | ||
| 3 | .text | |
| 4 | .cmu4: | |
| 5 | pop bx ! return address | |
| 6 | pop cx | |
| 7 | pop dx | |
| 8 | pop ax | |
| 9 | push si | |
| 10 | mov si,sp | |
| 11 | xchg bx,2(si) | |
| 12 | pop si | |
| 13 | cmp bx,dx | |
| 14 | ja 1f | |
| 15 | jb 2f | |
| 16 | cmp ax,cx | |
| 17 | ja 1f | |
| 18 | je 3f | |
| 19 | 2: | |
| 20 | mov ax,#-1 | |
| 21 | ret | |
| 22 | 3: | |
| 23 | xor ax,ax | |
| 24 | ret | |
| 25 | 1: | |
| 26 | mov ax,#1 | |
| 27 | ret |
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