1 /* $NetBSD: atomic_and_32_nv_cas.c,v 1.7 2014/02/22 17:08:30 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "atomic_op_namespace.h"
33
34 #include <sys/atomic.h>
35
36 uint32_t
atomic_and_32_nv(volatile uint32_t * addr,uint32_t val)37 atomic_and_32_nv(volatile uint32_t *addr, uint32_t val)
38 {
39 uint32_t old, new;
40
41 do {
42 old = *addr;
43 new = old & val;
44 } while (atomic_cas_32(addr, old, new) != old);
45
46 return (new);
47 }
48
49 #undef atomic_and_32_nv
50 atomic_op_alias(atomic_and_32_nv,_atomic_and_32_nv)
51 crt_alias(__sync_and_and_fetch_4,_atomic_and_32_nv)
52
53 #undef atomic_and_uint_nv
54 atomic_op_alias(atomic_and_uint_nv,_atomic_and_32_nv)
55 __strong_alias(_atomic_and_uint_nv,_atomic_and_32_nv)
56 #if !defined(_LP64)
57 #undef atomic_and_ulong_nv
58 atomic_op_alias(atomic_and_ulong_nv,_atomic_and_32_nv)
59 __strong_alias(_atomic_and_ulong_nv,_atomic_and_32_nv)
60 #endif /* _LP64 */
61