4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
30 #include <sys/asm_linkage.h>
32 ENTRY(atomic_add_64_nv)
42 SET_SIZE(atomic_add_64_nv)
45 movb (%rdi), %al // %al = old value
48 orb %al, %cl // %cl = new value
50 cmpxchgb %cl, (%rdi) // try to stick it in
52 movzbl %cl, %eax // return new value
54 SET_SIZE(atomic_or_8_nv)
61 SET_SIZE(atomic_cas_64)
63 ENTRY(membar_producer)
66 SET_SIZE(membar_producer)