diff options
Diffstat (limited to 'sysdeps/i386/i686/strcmp.S')
| -rw-r--r-- | sysdeps/i386/i686/strcmp.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/strcmp.S b/sysdeps/i386/i686/strcmp.S new file mode 100644 index 0000000000..8ffc5b0bb5 --- /dev/null +++ b/sysdeps/i386/i686/strcmp.S @@ -0,0 +1,48 @@ +/* Highly optimized version for ix86, x>=6. + Copyright (C) 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C 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" + +/* + INPUT PARAMETERS: + s1 (sp + 4) + s2 (sp + 8) +*/ + + + .text +ENTRY (strcmp) + movl 4(%esp), %ecx + movl 8(%esp), %edx +1: movb (%ecx), %al + incl %ecx + cmpb (%edx), %al + jne 2f + incl %edx + testb %al, %al + jnz 1b + xorl %eax, %eax + jmp 3f +2: movl $1, %eax + ja 3f + negl %eax +3: ret +END (strcmp) |