atomic_cas.S revision 1.3 
1/*	$NetBSD: atomic_cas.S,v 1.3 2008/02/10 13:40:31 ad 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include "atomic_op_asm.h"
40
41	.text
42
43LEAF_NOPROFILE(_atomic_cas_32, 3)
441:	mov	a2, t2
45	ldl_l	v0, 0(a0)
46	cmpeq	v0, a1, t1
47	beq	t1, 2f
48	stl_c	t2, 0(a0)
49	beq	t2, 3f
502:	RET
513:	br	1b
52	END(_atomic_cas_32)
53
54ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
55ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
56STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
57
58ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
59STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
60ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
61STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
62
63LEAF_NOPROFILE(_atomic_cas_64, 3)
641:	mov	a2, t2
65	ldq_l	v0, 0(a0)
66	cmpeq	v0, a1, t1
67	beq	t1, 2f
68	stq_c	t2, 0(a0)
69	beq	t2, 3f
702:	RET
713:	br	1b
72	END(_atomic_cas_64)
73
74ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
75ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
76STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
77ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
78STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
79
80ATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
81STRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
82ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
83STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
84ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
85STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
86