63 lines
1.6 KiB
ArmAsm
63 lines
1.6 KiB
ArmAsm
/* AMD64 __mpn_rshift --
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Copyright (C) 2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "sysdep.h"
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#include "asm-syntax.h"
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.text
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ENTRY (__mpn_rshift)
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movq (%rsi), %mm7
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movd %ecx, %mm1
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movl $64, %eax
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subl %ecx, %eax
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movd %eax, %mm0
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movq %mm7, %mm3
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psllq %mm0, %mm7
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movd %mm7, %rax
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leaq (%rsi,%rdx,8), %rsi
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leaq (%rdi,%rdx,8), %rdi
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negq %rdx
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addq $2, %rdx
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jg L(endo)
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.p2align 2
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L(loop):
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movq -8(%rsi,%rdx,8), %mm6
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movq %mm6, %mm2
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psllq %mm0, %mm6
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psrlq %mm1, %mm3
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por %mm6, %mm3
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movq %mm3, -16(%rdi,%rdx,8)
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je L(ende)
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movq (%rsi,%rdx,8), %mm7
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movq %mm7, %mm3
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psllq %mm0, %mm7
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psrlq %mm1, %mm2
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por %mm7, %mm2
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movq %mm2, -8(%rdi,%rdx,8)
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addq $2, %rdx
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jle L(loop)
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L(endo):
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movq %mm3, %mm2
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L(ende):
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psrlq %mm1, %mm2
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movq %mm2, -8(%rdi)
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emms
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ret
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END (__mpn_rshift)
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