projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a6730a00 | 1 | /* Kcmpd.s 1.4 90/12/04 */ |
| 6f4b515e | 2 | |
| 9d1834ba | 3 | #include "../tahoe/SYS.h" |
| 6f4b515e | 4 | |
| 2b252132 SL |
5 | /* |
| 6 | * cmpd(hi1, lo1, hi2, lo2) | |
| 7 | * register hi1, hi2; | |
| 8 | * register unsigned lo1, lo2; | |
| 9 | *{ | |
| 10 | * if(hi1 < 0) { | |
| 11 | * hi1 ^= 0x80000000; | |
| 12 | * if(lo1) { | |
| 13 | * lo1 = -lo1; | |
| 14 | * hi1 = ~hi1; | |
| 15 | * } else | |
| 16 | * hi1 = -hi1; | |
| 17 | * } | |
| 18 | * if(hi2 < 0) { | |
| 19 | * hi2 ^= 0x80000000; | |
| 20 | * if(lo2) { | |
| 21 | * lo2 = -lo2; | |
| 22 | * hi2 = ~hi2; | |
| 23 | * } else | |
| 24 | * hi2 = -hi2; | |
| 25 | * } | |
| 26 | * if(hi1 != hi2) | |
| 27 | * return(hi1>hi2 ? 1 : -1); | |
| 28 | * if(lo1 != lo2) | |
| 29 | * return(lo1>lo2 ? 1 : -1); | |
| 30 | * return(0); | |
| 31 | *} | |
| 32 | */ | |
| 33 | .text | |
| 34 | ENTRY(Kcmpd, 0) | |
| 35 | movl 8(fp),r3 | |
| 36 | movl 12(fp),r4 | |
| 37 | movl 16(fp),r2 | |
| 38 | movl 4(fp),r5 | |
| 39 | jgeq 1f | |
| 40 | xorl2 $0x80000000,r5 | |
| 41 | tstl r3 | |
| 42 | jeql 2f | |
| 43 | mnegl r3,r3 | |
| 44 | mcoml r5,r5 | |
| 45 | jbr 1f | |
| 46 | 2: | |
| 47 | mnegl r5,r5 | |
| 48 | 1: | |
| 49 | tstl r4 | |
| 50 | jgeq 1f | |
| 51 | xorl2 $0x80000000,r4 | |
| 52 | tstl r2 | |
| 53 | jeql 2f | |
| 54 | mnegl r2,r2 | |
| 55 | mcoml r4,r4 | |
| 56 | jbr 1f | |
| 57 | 2: | |
| 58 | mnegl r4,r4 | |
| 59 | 1: | |
| 60 | cmpl r5,r4 | |
| 61 | jeql 1f | |
| 62 | jleq 2f | |
| 63 | movl $1,r0 | |
| 64 | ret | |
| 65 | 2: | |
| 66 | mnegl $1,r0 | |
| 67 | ret | |
| 68 | 1: | |
| 69 | cmpl r3,r2 | |
| 70 | jeql 1f | |
| 71 | jlequ 2f | |
| 72 | movl $1,r0 | |
| 73 | ret | |
| 74 | 2: | |
| 75 | mnegl $1,r0 | |
| 76 | ret | |
| 77 | 1: | |
| 78 | clrl r0 | |
| 79 | ret |