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/* Copyright (C) 2012 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/>. */
#include <bits/xtensa-config.h>
#include <sysdep.h>
.text
ENTRY (pthread_spin_lock)
#if XCHAL_HAVE_EXCLUSIVE
memw
1: l32ex a3, a2
bnez a3, 1b
movi a3, 1
s32ex a3, a2
getex a3
beqz a3, 1b
memw
#elif XCHAL_HAVE_S32C1I
movi a3, 0
wsr a3, scompare1
movi a3, 1
1: s32c1i a3, a2, 0
bnez a3, 1b
#else
#error No hardware atomic operations
#endif
movi a2, 0
abi_ret
END (pthread_spin_lock)
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