projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 6b92951c KT |
1 | .globl pow, _pow |
| 2 | .globl log, exp | |
| 3 | ||
| 4 | _pow: | |
| 5 | mov r5,-(sp) | |
| 6 | mov sp,r5 | |
| 7 | movf 4(r5),fr0 | |
| 8 | movf 12.(r5),fr1 | |
| 9 | jsr pc,pow | |
| 10 | mov (sp)+,r5 | |
| 11 | rts pc | |
| 12 | ||
| 13 | pow: | |
| 14 | ||
| 15 | / 0^0\b~ is 0 | |
| 16 | ||
| 17 | tstf fr0 | |
| 18 | cfcc | |
| 19 | bne 1f | |
| 20 | tstf fr1 | |
| 21 | cfcc | |
| 22 | beq bad | |
| 23 | rts pc | |
| 24 | 1: | |
| 25 | ||
| 26 | / -^i is +^i fixed sign | |
| 27 | ||
| 28 | bpl 1f | |
| 29 | movf fr1,-(sp) | |
| 30 | modf $one,fr1 | |
| 31 | cfcc | |
| 32 | bne bad1 | |
| 33 | movf (sp)+,fr1 | |
| 34 | absf fr0 | |
| 35 | jsr pc,1f | |
| 36 | bes bad | |
| 37 | movf fr1,-(sp) | |
| 38 | modf $half,fr1 | |
| 39 | cfcc | |
| 40 | beq 2f | |
| 41 | negf fr0 | |
| 42 | 2: | |
| 43 | movf (sp)+,fr1 | |
| 44 | rts pc | |
| 45 | 1: | |
| 46 | jsr pc,log | |
| 47 | bes 1f | |
| 48 | mulf fr1,fr0 | |
| 49 | jsr pc,exp | |
| 50 | 1: | |
| 51 | rts pc | |
| 52 | ||
| 53 | bad1: | |
| 54 | movf (sp)+,fr1 | |
| 55 | bad: | |
| 56 | sec | |
| 57 | rts pc | |
| 58 | ||
| 59 | one = 40200 | |
| 60 | half = 40000 |