projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 6923133b | 1 | /* Highly optimized version for ix86, x>=6. |
| d4697bc9 | 2 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
| 6923133b UD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 6923133b UD |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| 6923133b | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 6923133b UD |
19 | |
| 20 | #include <sysdep.h> | |
| 21 | #include "asm-syntax.h" | |
| 22 | ||
| 2366713d | 23 | #define PARMS 4 /* no space for saved regs */ |
| 3f02f778 | 24 | #define STR1 PARMS |
| 2366713d | 25 | #define STR2 STR1+4 |
| 6923133b UD |
26 | |
| 27 | .text | |
| 2366713d | 28 | ENTRY (strcmp) |
| 3f02f778 GM |
29 | |
| 30 | movl STR1(%esp), %ecx | |
| 31 | movl STR2(%esp), %edx | |
| 32 | ||
| 33 | L(oop): movb (%ecx), %al | |
| 6923133b | 34 | cmpb (%edx), %al |
| 3f02f778 | 35 | jne L(neq) |
| 2fc08826 | 36 | incl %ecx |
| 6923133b UD |
37 | incl %edx |
| 38 | testb %al, %al | |
| 3f02f778 GM |
39 | jnz L(oop) |
| 40 | ||
| 6923133b | 41 | xorl %eax, %eax |
| 2fc08826 GM |
42 | /* when strings are equal, pointers rest one beyond |
| 43 | the end of the NUL terminators. */ | |
| bc15410e | 44 | ret |
| 3f02f778 | 45 | |
| dbda6079 UD |
46 | L(neq): movl $1, %eax |
| 47 | movl $-1, %ecx | |
| 48 | cmovbl %ecx, %eax | |
| 3f02f778 | 49 | |
| 3f02f778 | 50 | ret |
| 2366713d | 51 | END (strcmp) |
| 85dd1003 | 52 | libc_hidden_builtin_def (strcmp) |