43 lines
1.4 KiB
ArmAsm
43 lines
1.4 KiB
ArmAsm
/* AMD64 __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
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sum in a third limb vector.
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Copyright (C) 2004 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_sub_n)
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leaq (%rsi,%rcx,8), %rsi
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leaq (%rdi,%rcx,8), %rdi
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leaq (%rdx,%rcx,8), %rdx
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negq %rcx
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xorl %eax, %eax # clear cy
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.p2align 2
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L(loop):
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movq (%rsi,%rcx,8), %rax
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movq (%rdx,%rcx,8), %r10
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sbbq %r10, %rax
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movq %rax, (%rdi,%rcx,8)
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incq %rcx
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jne L(loop)
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movq %rcx, %rax # zero %rax
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adcq %rax, %rax
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ret
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END (__mpn_sub_n)
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