| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame^] | 1 | /* Highly optimized version for x86-64. |
| 2 | Copyright (C) 1999, 2000, 2002, 2003, 2005 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Based on i686 version contributed by Ulrich Drepper |
| 5 | <drepper@cygnus.com>, 1999. |
| 6 | |
| 7 | The GNU C Library is free software; you can redistribute it and/or |
| 8 | modify it under the terms of the GNU Lesser General Public |
| 9 | License as published by the Free Software Foundation; either |
| 10 | version 2.1 of the License, or (at your option) any later version. |
| 11 | |
| 12 | The GNU C Library is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | Lesser General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU Lesser General Public |
| 18 | License along with the GNU C Library; if not, write to the Free |
| 19 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 20 | 02111-1307 USA. */ |
| 21 | |
| 22 | #include "_glibc_inc.h" |
| 23 | |
| 24 | .text |
| 25 | ENTRY (BP_SYM (strcmp)) |
| 26 | L(oop): movb (%rdi), %al |
| 27 | cmpb (%rsi), %al |
| 28 | jne L(neq) |
| 29 | incq %rdi |
| 30 | incq %rsi |
| 31 | testb %al, %al |
| 32 | jnz L(oop) |
| 33 | |
| 34 | xorl %eax, %eax |
| 35 | ret |
| 36 | |
| 37 | L(neq): movl $1, %eax |
| 38 | movl $-1, %ecx |
| 39 | cmovbl %ecx, %eax |
| 40 | ret |
| 41 | END (BP_SYM (strcmp)) |
| 42 | |
| 43 | libc_hidden_def(strcmp) |
| 44 | #ifndef __UCLIBC_HAS_LOCALE__ |
| 45 | strong_alias(strcmp,strcoll) |
| 46 | libc_hidden_def(strcoll) |
| 47 | #endif |