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/* 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 <lowlevellock.h>
#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)
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