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/* Copyright (C) 2005 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; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#define _ERRNO_H 1
#include <bits/errno.h>
#include <bits/xtensa-config.h>
#include <sysdep.h>
.text
ENTRY (pthread_spin_trylock)
#if XCHAL_HAVE_EXCLUSIVE
memw
l32ex a3, a2
bnez a3, 1f
movi a3, 1
s32ex a3, a2
getex a3
addi a3, a3, -1
memw
1:
#elif XCHAL_HAVE_S32C1I
movi a3, 0
wsr a3, scompare1
movi a3, 1
s32c1i a3, a2, 0
#else
#error No hardware atomic operations
#endif
movi a2, EBUSY
moveqz a2, a3, a3
abi_ret
END (pthread_spin_trylock)
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