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authorUlrich Drepper <drepper@redhat.com>2009-04-14 22:26:05 +0000
committerUlrich Drepper <drepper@redhat.com>2009-04-14 22:26:05 +0000
commit893a5fd440f6ae2643bfb661e4d37f4195b7fabb (patch)
tree9abea79e0925435c1044176e088458394b44be0a /sysdeps/x86_64/rshift.S
parent7fd23f1f3b20b02be6fc1ab225282e828b077867 (diff)
downloadglibc-893a5fd440f6ae2643bfb661e4d37f4195b7fabb.tar.gz
Optimizations from GMP.
* sysdeps/x86_64/add_n.S: New file. * sysdeps/x86_64/addmul_1.S: New file. * sysdeps/x86_64/lshift.S: New file. * sysdeps/x86_64/mul_1.S: New file. * sysdeps/x86_64/rshift.S: New file. * sysdeps/x86_64/sub_n.S: New file. * sysdeps/x86_64/submul_1.S: New file.
Diffstat (limited to 'sysdeps/x86_64/rshift.S')
-rw-r--r--sysdeps/x86_64/rshift.S62
1 files changed, 62 insertions, 0 deletions
diff --git a/sysdeps/x86_64/rshift.S b/sysdeps/x86_64/rshift.S
new file mode 100644
index 0000000000..ee0c8aa15c
--- /dev/null
+++ b/sysdeps/x86_64/rshift.S
@@ -0,0 +1,62 @@
+/* AMD64 __mpn_rshift --
+ Copyright (C) 2004, 2006 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"
+#include "asm-syntax.h"
+
+ .text
+ENTRY (__mpn_rshift)
+ movq (%rsi), %mm7
+ movd %ecx, %mm1
+ movl $64, %eax
+ subl %ecx, %eax
+ movd %eax, %mm0
+ movq %mm7, %mm3
+ psllq %mm0, %mm7
+ movd %mm7, %rax
+ leaq (%rsi,%rdx,8), %rsi
+ leaq (%rdi,%rdx,8), %rdi
+ negq %rdx
+ addq $2, %rdx
+ jg L(endo)
+ .p2align 2
+L(loop):
+ movq -8(%rsi,%rdx,8), %mm6
+ movq %mm6, %mm2
+ psllq %mm0, %mm6
+ psrlq %mm1, %mm3
+ por %mm6, %mm3
+ movq %mm3, -16(%rdi,%rdx,8)
+ je L(ende)
+ movq (%rsi,%rdx,8), %mm7
+ movq %mm7, %mm3
+ psllq %mm0, %mm7
+ psrlq %mm1, %mm2
+ por %mm7, %mm2
+ movq %mm2, -8(%rdi,%rdx,8)
+ addq $2, %rdx
+ jle L(loop)
+L(endo):
+ movq %mm3, %mm2
+L(ende):
+ psrlq %mm1, %mm2
+ movq %mm2, -8(%rdi)
+ emms
+ ret
+END (__mpn_rshift)