1/*	$NetBSD: atomic_cas_up.S,v 1.2 2014/01/29 13:06:36 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/ras.h>
30#include "atomic_op_asm.h"
31
32	.text
33
34ENTRY(_atomic_cas_up)
35	.hidden	_C_LABEL(_atomic_cas_up)
36RAS_START_ASM_HIDDEN(_atomic_cas)
37	ld	[%o0], %o3			! get old value
38	cmp	%o1, %o3			! old == new?
39	beq,a	1f				! yes, do the store
40	 st	%o2, [%o0]			! (in the delay slot)
41RAS_END_ASM_HIDDEN(_atomic_cas)
421:
43	retl
44	 mov	%o3, %o0			! return old value
45
46ENTRY(_atomic_cas_16_up)
47	.hidden	_C_LABEL(_atomic_cas_16_up)
48RAS_START_ASM_HIDDEN(_atomic_cas_16)
49	lduh	[%o0], %o3			! get old value
50	cmp	%o1, %o3			! old == new?
51	beq,a	1f				! yes, do the store
52	 sth	%o2, [%o0]			! (in the delay slot)
53RAS_END_ASM_HIDDEN(_atomic_cas_16)
541:
55	retl
56	 mov	%o3, %o0			! return old value
57
58ENTRY(_atomic_cas_8_up)
59	.hidden	_C_LABEL(_atomic_cas_8_up)
60RAS_START_ASM_HIDDEN(_atomic_cas_8)
61	ldub	[%o0], %o3			! get old value
62	cmp	%o1, %o3			! old == new?
63	beq,a	1f				! yes, do the store
64	 stb	%o2, [%o0]			! (in the delay slot)
65RAS_END_ASM_HIDDEN(_atomic_cas_8)
661:
67	retl
68	 mov	%o3, %o0			! return old value
69
70