projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 8d9254fc | 1 | /* Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 1df34d4d MR |
2 | This file is part of GCC. |
| 3 | Contributed by Maciej W. Rozycki <macro@linux-mips.org>. | |
| 4 | ||
| 5 | This file is free software; you can redistribute it and/or modify it | |
| 6 | under the terms of the GNU General Public License as published by the | |
| 7 | Free Software Foundation; either version 3, or (at your option) any | |
| 8 | later version. | |
| 9 | ||
| 10 | This file is distributed in the hope that it will be useful, but | |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | General Public License for more details. | |
| 14 | ||
| 15 | Under Section 7 of GPL version 3, you are granted additional | |
| 16 | permissions described in the GCC Runtime Library Exception, version | |
| 17 | 3.1, as published by the Free Software Foundation. | |
| 18 | ||
| 19 | You should have received a copy of the GNU General Public License and | |
| 20 | a copy of the GCC Runtime Library Exception along with this program; | |
| 21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 22 | <http://www.gnu.org/licenses/>. */ | |
| 23 | ||
| 24 | #ifdef L_udivsi3 | |
| 25 | .text | |
| 26 | .globl __udivsi3 | |
| 27 | .type __udivsi3, @function | |
| 28 | __udivsi3: | |
| 29 | .word 0 | |
| 30 | movl 8(%ap), %r1 | |
| 31 | blss 0f /* Check bit #31 of divisor. */ | |
| 32 | movl 4(%ap), %r2 | |
| 33 | blss 1f /* Check bit #31 of dividend. */ | |
| 34 | ||
| 35 | /* Both zero, do a standard division. */ | |
| 36 | ||
| 37 | divl3 %r1, %r2, %r0 | |
| 38 | ret | |
| 39 | ||
| 40 | /* MSB of divisor set, only 1 or 0 may result. */ | |
| 41 | 0: | |
| 42 | decl %r1 | |
| 43 | clrl %r0 | |
| 44 | cmpl %r1, 4(%ap) | |
| 45 | adwc $0, %r0 | |
| 46 | ret | |
| 47 | ||
| 48 | /* MSB of dividend set, do an extended division. */ | |
| 49 | 1: | |
| 50 | clrl %r3 | |
| 51 | ediv %r1, %r2, %r0, %r3 | |
| 52 | ret | |
| 53 | .size __udivsi3, . - __udivsi3 | |
| 54 | .previous | |
| 55 | #endif | |
| 56 | ||
| 57 | #ifdef L_umodsi3 | |
| 58 | .text | |
| 59 | .globl __umodsi3 | |
| 60 | .type __umodsi3, @function | |
| 61 | __umodsi3: | |
| 62 | .word 0 | |
| 63 | movl 8(%ap), %r1 | |
| 64 | blss 0f /* Check bit #31 of divisor. */ | |
| 65 | movl 4(%ap), %r2 | |
| 66 | blss 1f /* Check bit #31 of dividend. */ | |
| 67 | ||
| 68 | /* Both zero, do a standard division. */ | |
| 69 | ||
| 70 | divl3 %r1, %r2, %r0 | |
| 71 | mull2 %r0, %r1 | |
| 72 | subl3 %r1, %r2, %r0 | |
| 73 | ret | |
| 74 | ||
| 75 | /* MSB of divisor set, subtract the divisor at most once. */ | |
| 76 | 0: | |
| 77 | movl 4(%ap), %r2 | |
| 78 | clrl %r0 | |
| 79 | cmpl %r2, %r1 | |
| 80 | sbwc $0, %r0 | |
| 81 | bicl2 %r0, %r1 | |
| 82 | subl3 %r1, %r2, %r0 | |
| 83 | ret | |
| 84 | ||
| 85 | /* MSB of dividend set, do an extended division. */ | |
| 86 | 1: | |
| 87 | clrl %r3 | |
| 88 | ediv %r1, %r2, %r3, %r0 | |
| 89 | ret | |
| 90 | .size __umodsi3, . - __umodsi3 | |
| 91 | .previous | |
| 92 | #endif |