/* AMD64 __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
sum in a third limb vector.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation
option) any later version.
The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY
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
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_sub_n)
leaq (%rsi,%rcx,8), %rsi
leaq (%rdi,%rcx,8), %rdi
leaq (%rdx,%rcx,8), %rdx
negq %rcx
xorl %eax, %eax # clear cy
.p2align 2
L(loop):
movq (%rsi,%rcx,8), %rax
movq (%rdx,%rcx,8), %r10
sbbq %r10, %rax
movq %rax, (%rdi,%rcx,8)
incq %rcx
jne L(loop)
movq %rcx, %rax # zero %rax
adcq %rax, %rax
ret
END (__mpn_sub_n)
