1/*	$NetBSD: atomic_cas_68000.S,v 1.6 2014/01/29 10:20:11 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 <sys/ras.h>
33#include "atomic_op_asm.h"
34
35	.text
36
37ENTRY(_atomic_cas_up)
38	.hidden	_C_LABEL(_atomic_cas_up)
39
40	movl	4(%sp), %a0		/* Fetch ptr */
41
42RAS_START_ASM_HIDDEN(_atomic_cas)
43	movl	(%a0), %d0		/* d0 = *ptr */
44	cmpl	8(%sp), %d0		/* Same as old? */
45	jne	1f			/* Nope */
46	movl	12(%sp), (%a0)		/* *ptr = new */
47RAS_END_ASM_HIDDEN(_atomic_cas)
481:	rts
49END(_atomic_cas_up)
50
51ENTRY(_atomic_cas_16_up)
52	.hidden	_C_LABEL(_atomic_cas_16_up)
53
54	movl	4(%sp), %a0		/* Fetch ptr */
55
56RAS_START_ASM_HIDDEN(_atomic_cas_16)
57	movw	(%a0), %d0		/* d0 = *ptr */
58	cmpw	8(%sp), %d0		/* Same as old? */
59	jne	1f			/* Nope */
60	movw	12(%sp), (%a0)		/* *ptr = new */
61RAS_END_ASM_HIDDEN(_atomic_cas_16)
621:	rts
63END(_atomic_cas_16_up)
64
65
66ENTRY(_atomic_cas_8_up)
67	.hidden	_C_LABEL(_atomic_cas_8_up)
68
69	movl	4(%sp), %a0		/* Fetch ptr */
70
71RAS_START_ASM_HIDDEN(_atomic_cas_8)
72	movb	(%a0), %d0		/* d0 = *ptr */
73	cmpb	8(%sp), %d0		/* Same as old? */
74	jne	1f			/* Nope */
75	movb	12(%sp), (%a0)		/* *ptr = new */
76RAS_END_ASM_HIDDEN(_atomic_cas_8)
771:	rts
78END(_atomic_cas_8_up)
79