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c787f0ec3e
These are already provided by the generic include/atomic.h. Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* Low-level functions for atomic operations. Mips version.
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Copyright (C) 2005-2025 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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<https://www.gnu.org/licenses/>. */
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#ifndef _MIPS_ATOMIC_MACHINE_H
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#define _MIPS_ATOMIC_MACHINE_H 1
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#include <sgidefs.h>
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#if _MIPS_SIM == _ABIO32 && __mips < 2
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#define MIPS_PUSH_MIPS2 ".set mips2\n\t"
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#else
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#define MIPS_PUSH_MIPS2
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#endif
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#if _MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIN32
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#define __HAVE_64B_ATOMICS 0
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#else
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#define __HAVE_64B_ATOMICS 1
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#endif
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/* See the comments in <sys/asm.h> about the use of the sync instruction. */
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#ifndef MIPS_SYNC
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# define MIPS_SYNC sync
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#endif
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#define MIPS_SYNC_STR_2(X) #X
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#define MIPS_SYNC_STR_1(X) MIPS_SYNC_STR_2(X)
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#define MIPS_SYNC_STR MIPS_SYNC_STR_1(MIPS_SYNC)
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/* MIPS is an LL/SC machine. However, XLP has a direct atomic exchange
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instruction which will be used by __atomic_exchange_n. */
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#ifdef _MIPS_ARCH_XLP
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# define ATOMIC_EXCHANGE_USES_CAS 0
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#else
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# define ATOMIC_EXCHANGE_USES_CAS 1
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#endif
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#ifdef __mips16
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# define atomic_full_barrier() __sync_synchronize ()
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#else /* !__mips16 */
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# define atomic_full_barrier() \
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__asm__ __volatile__ (".set push\n\t" \
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MIPS_PUSH_MIPS2 \
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MIPS_SYNC_STR "\n\t" \
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".set pop" : : : "memory")
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#endif /* !__mips16 */
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#endif /* atomic-machine.h */
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