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authorJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
commite64ac02c24b43659048622714afdc92fedf561fa (patch)
tree37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/mips/mips64/rshift.S
parenta20c2b3c87aebc7d4b090c622d36480263b80042 (diff)
downloadglibc-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.S101
1 files changed, 101 insertions, 0 deletions
diff --git a/ports/sysdeps/mips/mips64/rshift.S b/ports/sysdeps/mips/mips64/rshift.S
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+/* 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