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37 lines
1.0 KiB
ArmAsm
37 lines
1.0 KiB
ArmAsm
/* Copyright (C) 2012-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <lowlevellock.h>
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.globl pthread_spin_lock
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.type pthread_spin_lock,@function
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.align 16
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pthread_spin_lock:
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1: LOCK
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decl 0(%rdi)
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jne 2f
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xor %eax, %eax
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ret
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.align 16
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2: rep
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nop
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cmpl $0, 0(%rdi)
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jg 1b
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jmp 2b
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.size pthread_spin_lock,.-pthread_spin_lock
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