projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| feeeff5c | 1 | /* Unsigned 32 bit division optimized for Epiphany. |
| 8d9254fc | 2 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| feeeff5c JR |
3 | Contributed by Embecosm on behalf of Adapteva, Inc. |
| 4 | ||
| 5 | This file is part of GCC. | |
| 6 | ||
| 7 | This file is free software; you can redistribute it and/or modify it | |
| 8 | under the terms of the GNU General Public License as published by the | |
| 9 | Free Software Foundation; either version 3, or (at your option) any | |
| 10 | later version. | |
| 11 | ||
| 12 | This file is distributed in the hope that it will be useful, but | |
| 13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | General Public License for more details. | |
| 16 | ||
| 17 | Under Section 7 of GPL version 3, you are granted additional | |
| 18 | permissions described in the GCC Runtime Library Exception, version | |
| 19 | 3.1, as published by the Free Software Foundation. | |
| 20 | ||
| 21 | You should have received a copy of the GNU General Public License and | |
| 22 | a copy of the GCC Runtime Library Exception along with this program; | |
| 23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 | <http://www.gnu.org/licenses/>. */ | |
| 25 | ||
| 26 | #include "epiphany-asm.h" | |
| 27 | ||
| 28 | FSTAB (__modsi3,T_UINT) | |
| 29 | .global SYM(__modsi3) | |
| 30 | .balign 4 | |
| 31 | HIDDEN_FUNC(__modsi3) | |
| 32 | SYM(__modsi3): | |
| 33 | asr TMP3,r0,31 ; save sign | |
| 34 | float TMP0,r0 | |
| 35 | float TMP1,r1 | |
| 36 | mov r2,0 | |
| 37 | sub TMP4,r2,r0 | |
| 38 | beq .Lret_r0 | |
| 39 | movgt r0,TMP4 | |
| 40 | sub TMP2,r2,r1 | |
| 41 | movlte TMP2,r1 | |
| 42 | sub r2,TMP0,TMP1 | |
| 43 | lsl r2,r2,1 | |
| 44 | blte .L0step | |
| 45 | asr TMP4,r2,24 | |
| 46 | lsl r2,TMP4,3 | |
| 47 | mov TMP4,%low(.L0step) | |
| 48 | movt TMP4,%high(.L0step) | |
| 49 | sub r2,TMP4,r2 | |
| 50 | jr r2 | |
| 51 | #define STEP(n) lsl.l r2,TMP2,n` sub r2,r0,r2` movgteu r0,r2 | |
| 52 | .balign 8,,2 | |
| 53 | STEP(31)` STEP(30)` STEP(29)` STEP(28)` | |
| 54 | STEP(27)` STEP(26)` STEP(25)` STEP(24)` | |
| 55 | STEP(23)` STEP(22)` STEP(21)` STEP(20)` | |
| 56 | STEP(19)` STEP(18)` STEP(17)` STEP(16)` | |
| 57 | STEP(15)` STEP(14)` STEP(13)` STEP(12)` | |
| 58 | STEP(11)` STEP(10)` STEP(9)` STEP(8)` | |
| 59 | STEP(7)` STEP(6)` STEP(5)` STEP(4)` STEP(3)` STEP(2)` STEP(1) | |
| 60 | .L0step:STEP(0) | |
| 61 | eor r0,r0,TMP3 ; restore sign | |
| 62 | sub r0,r0,TMP3 | |
| 63 | .Lret_r0: | |
| 64 | rts | |
| 65 | ENDFUNC(__modsi3) |