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author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
commit | e64ac02c24b43659048622714afdc92fedf561fa (patch) | |
tree | 37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/mips/mips64/rshift.S | |
parent | a20c2b3c87aebc7d4b090c622d36480263b80042 (diff) | |
download | glibc-e64ac02c24b43659048622714afdc92fedf561fa.tar.gz |
Move all files into ports/ subdirectory in preparation for merge with glibcglibc-2.16-ports-before-merge
Diffstat (limited to 'ports/sysdeps/mips/mips64/rshift.S')
-rw-r--r-- | ports/sysdeps/mips/mips64/rshift.S | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/ports/sysdeps/mips/mips64/rshift.S b/ports/sysdeps/mips/mips64/rshift.S new file mode 100644 index 0000000000..3cb040859d --- /dev/null +++ b/ports/sysdeps/mips/mips64/rshift.S @@ -0,0 +1,101 @@ +/* MIPS3 __mpn_rshift -- + * + * Copyright (C) 1995, 2000, 2002, 2003 Free Software Foundation, Inc. + * + * This file is part of the GNU MP Library. + * + * The GNU MP Library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at your + * option) any later version. + * + * The GNU MP Library 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 Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with the GNU MP Library. If not, see + * <http://www.gnu.org/licenses/>. + */ + +#include <sysdep.h> +#include <sys/asm.h> + +/* INPUT PARAMETERS + * res_ptr $4 + * src_ptr $5 + * size $6 + * cnt $7 + */ + +#ifdef __PIC__ + .option pic2 +#endif + .text + .align 2 + .globl __mpn_rshift + .ent __mpn_rshift +__mpn_rshift: +#ifdef __PIC__ + SETUP_GP /* ??? unused */ +#endif + .set noreorder + .set nomacro + + ld $10,0($5) # load first limb + dsubu $13,$0,$7 + daddiu $6,$6,-1 + and $9,$6,4-1 # number of limbs in first loop + beq $9,$0,L(L0) # if multiple of 4 limbs, skip first loop + dsll $2,$10,$13 # compute function result + + dsubu $6,$6,$9 + +L(Loop0): ld $3,8($5) + daddiu $4,$4,8 + daddiu $5,$5,8 + daddiu $9,$9,-1 + dsrl $11,$10,$7 + dsll $12,$3,$13 + move $10,$3 + or $8,$11,$12 + bne $9,$0,L(Loop0) + sd $8,-8($4) + +L(L0): beq $6,$0,L(Lend) + nop + +L(Loop): ld $3,8($5) + daddiu $4,$4,32 + daddiu $6,$6,-4 + dsrl $11,$10,$7 + dsll $12,$3,$13 + + ld $10,16($5) + dsrl $14,$3,$7 + or $8,$11,$12 + sd $8,-32($4) + dsll $9,$10,$13 + + ld $3,24($5) + dsrl $11,$10,$7 + or $8,$14,$9 + sd $8,-24($4) + dsll $12,$3,$13 + + ld $10,32($5) + dsrl $14,$3,$7 + or $8,$11,$12 + sd $8,-16($4) + dsll $9,$10,$13 + + daddiu $5,$5,32 + or $8,$14,$9 + bgtz $6,L(Loop) + sd $8,-8($4) + +L(Lend): dsrl $8,$10,$7 + j $31 + sd $8,0($4) + .end __mpn_rshift |