1 1.1 mrg /* Unsigned 32 bit modulo optimized for Epiphany. 2 1.1.1.11 mrg Copyright (C) 2009-2024 Free Software Foundation, Inc. 3 1.1 mrg Contributed by Embecosm on behalf of Adapteva, Inc. 4 1.1 mrg 5 1.1 mrg This file is part of GCC. 6 1.1 mrg 7 1.1 mrg This file is free software; you can redistribute it and/or modify it 8 1.1 mrg under the terms of the GNU General Public License as published by the 9 1.1 mrg Free Software Foundation; either version 3, or (at your option) any 10 1.1 mrg later version. 11 1.1 mrg 12 1.1 mrg This file is distributed in the hope that it will be useful, but 13 1.1 mrg WITHOUT ANY WARRANTY; without even the implied warranty of 14 1.1 mrg MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 1.1 mrg General Public License for more details. 16 1.1 mrg 17 1.1 mrg Under Section 7 of GPL version 3, you are granted additional 18 1.1 mrg permissions described in the GCC Runtime Library Exception, version 19 1.1 mrg 3.1, as published by the Free Software Foundation. 20 1.1 mrg 21 1.1 mrg You should have received a copy of the GNU General Public License and 22 1.1 mrg a copy of the GCC Runtime Library Exception along with this program; 23 1.1 mrg see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 1.1 mrg <http://www.gnu.org/licenses/>. */ 25 1.1 mrg 26 1.1 mrg #include "epiphany-asm.h" 27 1.1 mrg 28 1.1 mrg FSTAB (__umodsi3,T_UINT) 29 1.1 mrg .global SYM(__umodsi3) 30 1.1 mrg .balign 4 31 1.1 mrg HIDDEN_FUNC(__umodsi3) 32 1.1 mrg SYM(__umodsi3): 33 1.1 mrg mov r2,5 34 1.1 mrg lsl r2,r2,29 ; 0xa0000000 35 1.1 mrg orr r3,r2,r0 36 1.1 mrg lsr r15,r0,16 37 1.1 mrg movt r15,0xa800 38 1.1 mrg movne r3,r15 39 1.1 mrg lsr r16,r2,2 ; 0x28000000 40 1.1 mrg and r15,r3,r16 41 1.1 mrg fadd r12,r3,r15 42 1.1 mrg orr r3,r2,r1 43 1.1 mrg lsr r2,r1,16 44 1.1 mrg movt r2,0xa800 45 1.1 mrg movne r3,r2 46 1.1 mrg and r2,r16,r3 47 1.1 mrg fadd r3,r3,r2 48 1.1 mrg sub r2,r0,r1 49 1.1 mrg bltu .Lret_a 50 1.1 mrg lsr r12,r12,23 51 1.1 mrg mov r2,%low(.L0step) 52 1.1 mrg movt r2,%high(.L0step) 53 1.1 mrg lsr r3,r3,23 54 1.1 mrg sub r3,r12,r3 ; calculate bit number difference. 55 1.1 mrg lsl r3,r3,3 56 1.1 mrg sub r2,r2,r3 57 1.1 mrg jr r2 58 1.1 mrg /* lsl_l r2,r1,n` sub r2,r0,r2` movgteu r0,r2 */ 59 1.1 mrg #define STEP(n) .long 0x0006441f | (n) << 5` sub r2,r0,r2` movgteu r0,r2 60 1.1 mrg .balign 8,,2 61 1.1 mrg STEP(31)` STEP(30)` STEP(29)` STEP(28)` 62 1.1 mrg STEP(27)` STEP(26)` STEP(25)` STEP(24)` 63 1.1 mrg STEP(23)` STEP(22)` STEP(21)` STEP(20)` 64 1.1 mrg STEP(19)` STEP(18)` STEP(17)` STEP(16)` 65 1.1 mrg STEP(15)` STEP(14)` STEP(13)` STEP(12)` 66 1.1 mrg STEP(11)` STEP(10)` STEP(9)` STEP(8)` 67 1.1 mrg STEP(7)` STEP(6)` STEP(5)` STEP(4)` STEP(3)` STEP(2)` STEP(1) 68 1.1 mrg .L0step:STEP(0) 69 1.1 mrg .Lret_a:rts 70 1.1 mrg ENDFUNC(__umodsi3) 71
Indexes created Sat Feb 28 05:31:39 UTC 2026