From 15f34685e7a9b5caf761af2ebf6afa20438d440b Mon Sep 17 00:00:00 2001 From: gcc Date: Thu, 17 Aug 2006 01:18:26 +0000 Subject: Import glibc-mainline for 2006-08-16 git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d --- libc/sysdeps/x86_64/strcmp.S | 45 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 libc/sysdeps/x86_64/strcmp.S (limited to 'libc/sysdeps/x86_64/strcmp.S') diff --git a/libc/sysdeps/x86_64/strcmp.S b/libc/sysdeps/x86_64/strcmp.S new file mode 100644 index 000000000..119b88e40 --- /dev/null +++ b/libc/sysdeps/x86_64/strcmp.S @@ -0,0 +1,45 @@ +/* Highly optimized version for x86-64. + Copyright (C) 1999, 2000, 2002, 2003, 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Based on i686 version contributed by Ulrich Drepper + , 1999. + + The GNU C 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 C 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 C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include "asm-syntax.h" +#include "bp-sym.h" +#include "bp-asm.h" + + .text +ENTRY (BP_SYM (strcmp)) +L(oop): movb (%rdi), %al + cmpb (%rsi), %al + jne L(neq) + incq %rdi + incq %rsi + testb %al, %al + jnz L(oop) + + xorl %eax, %eax + ret + +L(neq): movl $1, %eax + movl $-1, %ecx + cmovbl %ecx, %eax + ret +END (BP_SYM (strcmp)) +libc_hidden_builtin_def (strcmp) -- cgit v1.2.1