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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/libgcc/config/epiphany/modsi3.S | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/libgcc/config/epiphany/modsi3.S')
-rw-r--r-- | gcc-4.9/libgcc/config/epiphany/modsi3.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/epiphany/modsi3.S b/gcc-4.9/libgcc/config/epiphany/modsi3.S new file mode 100644 index 000000000..68b1a2f75 --- /dev/null +++ b/gcc-4.9/libgcc/config/epiphany/modsi3.S @@ -0,0 +1,77 @@ +/* Signed 32 bit modulo optimized for Epiphany. + Copyright (C) 2009-2014 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 (__modsi3,T_INT) + .global SYM(__modsi3) + .balign 4 + HIDDEN_FUNC(__modsi3) +SYM(__modsi3): + asr r17,r0,31 ; save sign + mov r2,0 + sub r3,r2,r0 + movgt r0,r3 + sub r3,r2,r1 + movgt r1,r3 + movt r2,0xa000 ; 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:eor r0,r0,r17 ; restore sign + sub r0,r0,r17 + rts + ENDFUNC(__modsi3) |