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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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