| /* Unsigned 32 bit modulo optimized for Epiphany. |
| Copyright (C) 2009-2022 Free Software Foundation, Inc. |
| Contributed by Embecosm on behalf of Adapteva, Inc. |
| |
| This file is part of GCC. |
| |
| This file is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by the |
| Free Software Foundation; either version 3, or (at your option) any |
| later version. |
| |
| This file is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "epiphany-asm.h" |
| |
| FSTAB (__umodsi3,T_UINT) |
| .global SYM(__umodsi3) |
| .balign 4 |
| HIDDEN_FUNC(__umodsi3) |
| SYM(__umodsi3): |
| mov r2,5 |
| lsl r2,r2,29 ; 0xa0000000 |
| orr r3,r2,r0 |
| lsr r15,r0,16 |
| movt r15,0xa800 |
| movne r3,r15 |
| lsr r16,r2,2 ; 0x28000000 |
| and r15,r3,r16 |
| fadd r12,r3,r15 |
| orr r3,r2,r1 |
| lsr r2,r1,16 |
| movt r2,0xa800 |
| movne r3,r2 |
| and r2,r16,r3 |
| fadd r3,r3,r2 |
| sub r2,r0,r1 |
| bltu .Lret_a |
| lsr r12,r12,23 |
| mov r2,%low(.L0step) |
| movt r2,%high(.L0step) |
| lsr r3,r3,23 |
| sub r3,r12,r3 ; calculate bit number difference. |
| lsl r3,r3,3 |
| sub r2,r2,r3 |
| jr r2 |
| /* lsl_l r2,r1,n` sub r2,r0,r2` movgteu r0,r2 */ |
| #define STEP(n) .long 0x0006441f | (n) << 5` sub r2,r0,r2` movgteu r0,r2 |
| .balign 8,,2 |
| STEP(31)` STEP(30)` STEP(29)` STEP(28)` |
| STEP(27)` STEP(26)` STEP(25)` STEP(24)` |
| STEP(23)` STEP(22)` STEP(21)` STEP(20)` |
| STEP(19)` STEP(18)` STEP(17)` STEP(16)` |
| STEP(15)` STEP(14)` STEP(13)` STEP(12)` |
| STEP(11)` STEP(10)` STEP(9)` STEP(8)` |
| STEP(7)` STEP(6)` STEP(5)` STEP(4)` STEP(3)` STEP(2)` STEP(1) |
| .L0step:STEP(0) |
| .Lret_a:rts |
| ENDFUNC(__umodsi3) |