diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/epiphany/umodsi3-float.S')
| -rw-r--r-- | gcc-4.9/libgcc/config/epiphany/umodsi3-float.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/epiphany/umodsi3-float.S b/gcc-4.9/libgcc/config/epiphany/umodsi3-float.S new file mode 100644 index 000000000..029ce2c5e --- /dev/null +++ b/gcc-4.9/libgcc/config/epiphany/umodsi3-float.S @@ -0,0 +1,63 @@ +/* Unsigned 32 bit division 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" + +/* Because we handle a divident with bit 31 set with truncating integer + arithmetic, there is no rounding-related overflow. */ + FSTAB (__umodsi3,T_UINT) + .global SYM(__umodsi3) + .balign 4 + HIDDEN_FUNC(__umodsi3) +SYM(__umodsi3): + float r2,r0 + mov TMP1,%low(0xb0800000) ; ??? this would be faster with small data + float TMP2,r1 + movt TMP1,%high(0xb0800000) + asr TMP0,r0,8 + sub TMP0,TMP0,TMP1 + mov TMP1,%low(.L0step) + movgteu r2,TMP0 + sub r2,r2,TMP2 + blteu .L0step + asr r2,r2,23 + movt TMP1,%high(.L0step) + lsl TMP2,r2,3 + lsl r2,r1,r2` sub r2,r0,r2` movgteu r0,r2 ; STEP(r2) + sub r2,TMP1,TMP2 + jr r2 +#define STEP(n) lsl.l r2,r1,n` 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_r0: + rts + ENDFUNC(__umodsi3) |