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0f34d426ac
The UP macro is never defined. Also define LOCK_PREFIX unconditionally, to the same string. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
39 lines
1.1 KiB
ArmAsm
39 lines
1.1 KiB
ArmAsm
/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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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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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <errno.h>
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ENTRY (pthread_spin_trylock)
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movl 4(%esp), %edx
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movl $1, %eax
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xorl %ecx, %ecx
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lock
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cmpxchgl %ecx, (%edx)
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movl $EBUSY, %eax
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#ifdef HAVE_CMOV
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cmovel %ecx, %eax
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#else
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jne 0f
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movl %ecx, %eax
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0:
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#endif
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ret
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END (pthread_spin_trylock)
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