| /* Copyright (C) 2012-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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> |
| |
| ENTRY(pthread_spin_lock) |
| 1: LOCK |
| decl 0(%rdi) |
| jne 2f |
| xor %eax, %eax |
| ret |
| |
| .align 16 |
| 2: rep |
| nop |
| cmpl $0, 0(%rdi) |
| jg 1b |
| jmp 2b |
| END(pthread_spin_lock) |
