1/*	$NetBSD: atomic_cas.S,v 1.8 2014/03/07 07:17:54 matt 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__RCSID("$NetBSD: atomic_cas.S,v 1.8 2014/03/07 07:17:54 matt Exp $")
35
36	.text
37ENTRY(_atomic_cas_32)
38	mr	%r10,%r3
391:	lwarx	%r3,0,%r10
40	cmpw	%r3,%r4
41	bnelr-
42	stwcx.	%r5,0,%r10
43	beqlr+
44	b	1b
45END(_atomic_cas_32)
46
47ATOMIC_OP_ALIAS(atomic_cas_32,_atomic_cas_32)
48ATOMIC_OP_ALIAS(atomic_cas_32_ni,_atomic_cas_32)
49STRONG_ALIAS(_atomic_cas_32_ni,_atomic_cas_32)
50
51ATOMIC_OP_ALIAS(atomic_cas_uint,_atomic_cas_32)
52ATOMIC_OP_ALIAS(atomic_cas_uint_ni,_atomic_cas_32)
53
54STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
55STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32)
56
57#if defined(_LP64)
58ENTRY(_atomic_cas_64)
59	mr	%r10,%r3
601:	ldarx	%r3,0,%r10
61	cmpd	%r3,%r4
62	bnelr-
63	stdcx.	%r5,0,%r10
64	beqlr+
65	b	1b
66END(_atomic_cas_64)
67
68ATOMIC_OP_ALIAS(atomic_cas_64,_atomic_cas_64)
69ATOMIC_OP_ALIAS(atomic_cas_64_ni,_atomic_cas_64)
70STRONG_ALIAS(_atomic_cas_64_ni,_atomic_cas_64)
71
72ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_64)
73ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_64)
74
75ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_64)
76ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_64)
77
78STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
79STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64)
80
81STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
82STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64)
83#else
84ATOMIC_OP_ALIAS(atomic_cas_ulong,_atomic_cas_32)
85ATOMIC_OP_ALIAS(atomic_cas_ulong_ni,_atomic_cas_32)
86
87ATOMIC_OP_ALIAS(atomic_cas_ptr,_atomic_cas_32)
88ATOMIC_OP_ALIAS(atomic_cas_ptr_ni,_atomic_cas_32)
89
90STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
91STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32)
92
93STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
94STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32)
95#endif
96