projects / unix-history / blame
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| 7c27088c KB |
1 | /*- |
| 2 | * Copyright (c) 1985 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Computer Consoles Inc. | |
| 7 | * | |
| c0567266 KB |
8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| af359dea C |
35 | * |
| 36 | * @(#)Kcmpd.s 7.1 (Berkeley) 12/6/90 | |
| 7c27088c | 37 | */ |
| 6f4b515e | 38 | |
| 9d1834ba | 39 | #include "../tahoe/SYS.h" |
| 6f4b515e | 40 | |
| 2b252132 SL |
41 | /* |
| 42 | * cmpd(hi1, lo1, hi2, lo2) | |
| 43 | * register hi1, hi2; | |
| 44 | * register unsigned lo1, lo2; | |
| 45 | *{ | |
| 46 | * if(hi1 < 0) { | |
| 47 | * hi1 ^= 0x80000000; | |
| 48 | * if(lo1) { | |
| 49 | * lo1 = -lo1; | |
| 50 | * hi1 = ~hi1; | |
| 51 | * } else | |
| 52 | * hi1 = -hi1; | |
| 53 | * } | |
| 54 | * if(hi2 < 0) { | |
| 55 | * hi2 ^= 0x80000000; | |
| 56 | * if(lo2) { | |
| 57 | * lo2 = -lo2; | |
| 58 | * hi2 = ~hi2; | |
| 59 | * } else | |
| 60 | * hi2 = -hi2; | |
| 61 | * } | |
| 62 | * if(hi1 != hi2) | |
| 63 | * return(hi1>hi2 ? 1 : -1); | |
| 64 | * if(lo1 != lo2) | |
| 65 | * return(lo1>lo2 ? 1 : -1); | |
| 66 | * return(0); | |
| 67 | *} | |
| 68 | */ | |
| 69 | .text | |
| 70 | ENTRY(Kcmpd, 0) | |
| 71 | movl 8(fp),r3 | |
| 72 | movl 12(fp),r4 | |
| 73 | movl 16(fp),r2 | |
| 74 | movl 4(fp),r5 | |
| 75 | jgeq 1f | |
| 76 | xorl2 $0x80000000,r5 | |
| 77 | tstl r3 | |
| 78 | jeql 2f | |
| 79 | mnegl r3,r3 | |
| 80 | mcoml r5,r5 | |
| 81 | jbr 1f | |
| 82 | 2: | |
| 83 | mnegl r5,r5 | |
| 84 | 1: | |
| 85 | tstl r4 | |
| 86 | jgeq 1f | |
| 87 | xorl2 $0x80000000,r4 | |
| 88 | tstl r2 | |
| 89 | jeql 2f | |
| 90 | mnegl r2,r2 | |
| 91 | mcoml r4,r4 | |
| 92 | jbr 1f | |
| 93 | 2: | |
| 94 | mnegl r4,r4 | |
| 95 | 1: | |
| 96 | cmpl r5,r4 | |
| 97 | jeql 1f | |
| 98 | jleq 2f | |
| 99 | movl $1,r0 | |
| 100 | ret | |
| 101 | 2: | |
| 102 | mnegl $1,r0 | |
| 103 | ret | |
| 104 | 1: | |
| 105 | cmpl r3,r2 | |
| 106 | jeql 1f | |
| 107 | jlequ 2f | |
| 108 | movl $1,r0 | |
| 109 | ret | |
| 110 | 2: | |
| 111 | mnegl $1,r0 | |
| 112 | ret | |
| 113 | 1: | |
| 114 | clrl r0 | |
| 115 | ret |