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/* 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)
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