0a6a1f1d05
This brings our tree to NetBSD 7.0, as found on -current on the 10-10-2015. This updates: - LLVM to 3.6.1 - GCC to GCC 5.1 - Replace minix/commands/zdump with usr.bin/zdump - external/bsd/libelf has moved to /external/bsd/elftoolchain/ - Import ctwm - Drop sprintf from libminc Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* $NetBSD: atomic_and_32_cas.c,v 1.10 2014/06/23 21:53:45 joerg Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "atomic_op_namespace.h"
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#include <sys/atomic.h>
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uint32_t fetch_and_and_4(volatile uint32_t *, uint32_t, ...)
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#if defined(_LIBC) || defined(_HARDKERNEL)
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asm("__sync_fetch_and_and_4"); /* C runtime internal */
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#else
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;
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#endif
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uint32_t
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fetch_and_and_4(volatile uint32_t *addr, uint32_t val, ...)
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{
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uint32_t old, new;
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do {
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old = *addr;
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new = old & val;
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} while (atomic_cas_32(addr, old, new) != old);
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return old;
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}
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void
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atomic_and_32(volatile uint32_t *addr, uint32_t val)
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{
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(void) fetch_and_and_4(addr, val);
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}
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__strong_alias(__atomic_fetch_and_4,__sync_fetch_and_and_4)
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#undef atomic_and_32
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atomic_op_alias(atomic_and_32,_atomic_and_32)
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#undef atomic_and_uint
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atomic_op_alias(atomic_and_uint,_atomic_and_32)
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__strong_alias(_atomic_and_uint,_atomic_and_32)
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#if !defined(_LP64)
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#undef atomic_and_ulong
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atomic_op_alias(atomic_and_ulong,_atomic_and_32)
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__strong_alias(_atomic_and_ulong,_atomic_and_32)
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#endif /* _LP64 */
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