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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/mips/rshift.S
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/mips/rshift.S')
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diff --git a/sysdeps/mips/rshift.S b/sysdeps/mips/rshift.S
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+/* MIPS2 __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; see the file COPYING.LIB. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include <sysdep.h>
+
+/* INPUT PARAMETERS
+ res_ptr $4
+ src_ptr $5
+ size $6
+ cnt $7
+*/
+#ifdef __PIC__
+ .option pic2
+#endif
+ENTRY (__mpn_rshift)
+ .set noreorder
+#ifdef __PIC__
+ .cpload t9
+#endif
+ .set nomacro
+
+ lw $10,0($5) /* load first limb */
+ subu $13,$0,$7
+ addiu $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*/
+ sll $2,$10,$13 /* compute function result */
+
+ subu $6,$6,$9
+
+L(Loop0): lw $3,4($5)
+ addiu $4,$4,4
+ addiu $5,$5,4
+ addiu $9,$9,-1
+ srl $11,$10,$7
+ sll $12,$3,$13
+ move $10,$3
+ or $8,$11,$12
+ bne $9,$0,L(Loop0)
+ sw $8,-4($4)
+
+L(L0): beq $6,$0,L(Lend)
+ nop
+
+L(Loop): lw $3,4($5)
+ addiu $4,$4,16
+ addiu $6,$6,-4
+ srl $11,$10,$7
+ sll $12,$3,$13
+
+ lw $10,8($5)
+ srl $14,$3,$7
+ or $8,$11,$12
+ sw $8,-16($4)
+ sll $9,$10,$13
+
+ lw $3,12($5)
+ srl $11,$10,$7
+ or $8,$14,$9
+ sw $8,-12($4)
+ sll $12,$3,$13
+
+ lw $10,16($5)
+ srl $14,$3,$7
+ or $8,$11,$12
+ sw $8,-8($4)
+ sll $9,$10,$13
+
+ addiu $5,$5,16
+ or $8,$14,$9
+ bgtz $6,L(Loop)
+ sw $8,-4($4)
+
+L(Lend): srl $8,$10,$7
+ j $31
+ sw $8,0($4)
+ END (__mpn_rshift)