diff options
Diffstat (limited to 'sysdeps/x86_64/sub_n.S')
| -rw-r--r-- | sysdeps/x86_64/sub_n.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/x86_64/sub_n.S b/sysdeps/x86_64/sub_n.S new file mode 100644 index 0000000000..48e1a2e0f4 --- /dev/null +++ b/sysdeps/x86_64/sub_n.S @@ -0,0 +1,42 @@ +/* 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; 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_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) |