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d4697bc9 | 1 | /* Copyright (C) 2012-2014 Free Software Foundation, Inc. |
76a50749 | 2 | This file is part of the GNU C Library. |
76a50749 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
76a50749 | 17 | |
b93d565a | 18 | #include <lowlevellock.h> |
ff8a695b | 19 | |
b93d565a PP |
20 | .globl pthread_spin_lock |
21 | .type pthread_spin_lock,@function | |
22 | .align 16 | |
23 | pthread_spin_lock: | |
24 | 1: LOCK | |
25 | decl 0(%rdi) | |
26 | jne 2f | |
27 | xor %eax, %eax | |
28 | ret | |
29 | ||
30 | .align 16 | |
31 | 2: rep | |
32 | nop | |
33 | cmpl $0, 0(%rdi) | |
34 | jg 1b | |
35 | jmp 2b | |
36 | .size pthread_spin_lock,.-pthread_spin_lock |