1/*	$NetBSD: atomic_cas.S,v 1.5 2008/05/25 15:56:11 chs Exp $	*/
2
3/*-
4 * Copyright (c) 2007, 2008 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_asm.h"
33
34	.text
35
36LEAF(_atomic_cas_32, 3)
371:	mov	a2, t2
38	ldl_l	v0, 0(a0)
39	cmpeq	v0, a1, t1
40	beq	t1, 2f
41	stl_c	t2, 0(a0)
42	beq	t2, 3f
432:	RET
443:	br	1b
45	END(_atomic_cas_32)
46
47ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
48ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
49STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
50
51ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
52STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
53ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
54STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
55
56LEAF(_atomic_cas_64, 3)
571:	mov	a2, t2
58	ldq_l	v0, 0(a0)
59	cmpeq	v0, a1, t1
60	beq	t1, 2f
61	stq_c	t2, 0(a0)
62	beq	t2, 3f
632:	RET
643:	br	1b
65	END(_atomic_cas_64)
66
67ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
68ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
69STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
70ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
71STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
72
73ATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
74STRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
75ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
76STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
77ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
78STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
79