| /* Highly optimized version for ix86, x>=6. |
| Copyright (C) 1999-2014 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 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include "asm-syntax.h" |
| |
| #define PARMS 4 /* no space for saved regs */ |
| #define STR1 PARMS |
| #define STR2 STR1+4 |
| |
| .text |
| ENTRY (strcmp) |
| |
| movl STR1(%esp), %ecx |
| movl STR2(%esp), %edx |
| |
| L(oop): movb (%ecx), %al |
| cmpb (%edx), %al |
| jne L(neq) |
| incl %ecx |
| incl %edx |
| testb %al, %al |
| jnz L(oop) |
| |
| xorl %eax, %eax |
| /* when strings are equal, pointers rest one beyond |
| the end of the NUL terminators. */ |
| ret |
| |
| L(neq): movl $1, %eax |
| movl $-1, %ecx |
| cmovbl %ecx, %eax |
| |
| ret |
| END (strcmp) |
| libc_hidden_builtin_def (strcmp) |
