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author | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
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committer | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
commit | 15f34685e7a9b5caf761af2ebf6afa20438d440b (patch) | |
tree | dc04ce3cdf040f198743c15b64557824de174680 /libc/sysdeps/x86_64/strcmp.S | |
parent | 1e848e0e775a36f6359161f5deb890942ef42ff3 (diff) | |
download | eglibc2-15f34685e7a9b5caf761af2ebf6afa20438d440b.tar.gz |
Import glibc-mainline for 2006-08-16
git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d
Diffstat (limited to 'libc/sysdeps/x86_64/strcmp.S')
-rw-r--r-- | libc/sysdeps/x86_64/strcmp.S | 45 |
1 files changed, 45 insertions, 0 deletions
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 + <drepper@cygnus.com>, 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 <sysdep.h> +#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) |