atomic_cas_32.S revision 1.3
1/*	$NetBSD: atomic_cas_32.S,v 1.3 2019/04/17 07:35:38 mrg 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)
34	mv	t0, a0
351:	lr.w	a0, 0(t0)
36	bne	a1, a0, 2f
37	sc.w	t1, a2, 0(t0)
38	bnez	t1, 1b
392:
40	ret
41END(_atomic_cas_32)
42
43ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
44ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
45STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
46
47ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
48STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
49ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
50STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
51
52#ifndef _LP64
53ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
54STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
55ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
56STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
57ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
58STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
59ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
60STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)
61#endif
62CRT_ALIAS(__sync_val_compare_and_swap_4,_atomic_cas_32)
63
64ENTRY_NP(_atomic_bool_cas_32)
65	mv	t0, a0
66	li	a0, 0
671:	lr.w	t1, 0(t0)
68	bne	a1, t1, 2f
69	sc.w	t1, a2, 0(t0)
70	bnez	t1, 1b
71	li	a0, 1
722:
73	ret
74END(_atomic_bool_cas_32)
75
76ATOMIC_OP_ALIAS(atomic_bool_cas_32,_atomic_bool_cas_32)
77CRT_ALIAS(__bool_val_compare_and_swap_4,_atomic_bool_cas_32)
78