atomic_cas_32.S revision 1.1 
1/*	$NetBSD: atomic_cas_32.S,v 1.1 2014/09/19 17:36:24 matt Exp $	*/
2/*-
3 * Copyright (c) 2014 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Matt Thomas <matt@3am-software.com>
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "atomic_op_asm.h"
32
33ENTRY_NP(_atomic_cas_32)
341:	lr.w	v0, 0(a0)
35	bne	a1, v0, 2f
36	sc.w	v1, a2, 0(a0)
37	bnez	v1, 1b
382:
39	ret
40END(_atomic_cas_32)
41
42ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
43ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
44STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
45#ifndef _LP64
46ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
47STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
48ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
49STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
50ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
51STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
52ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
53STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)
54#endif
55CRT_ALIAS(__sync_val_compare_and_swap_4,_atomic_cas_32)
56
57ENTRY_NP(_atomic_bool_cas_32)
58	li	v0, 0
591:	lr.w	v1, 0(a0)
60	bne	a1, v1, 2f
61	sc.w	v1, a2, 0(a0)
62	bnez	v1, 1b
63	li	v0, 1
642:
65	ret
66END(_atomic_bool_cas_32)
67
68ATOMIC_OP_ALIAS(atomic_bool_cas_32,_atomic_bool_cas_32)
69CRT_ALIAS(__bool_val_compare_and_swap_4,_atomic_bool_cas_32)
70