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 (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
29 #include <sys/asm_linkage.h>
31 ENTRY(atomic_add_64_nv)
32 mov %rsi, %rax // %rax = delta addend
34 xaddq %rsi, (%rdi) // %rsi = old value, (%rdi) = sum
35 addq %rsi, %rax // new value = original value + delta
37 SET_SIZE(atomic_add_64_nv)
40 movb (%rdi), %al // %al = old value
43 orb %al, %cl // %cl = new value
45 cmpxchgb %cl, (%rdi) // try to stick it in
47 movzbl %cl, %eax // return new value
49 SET_SIZE(atomic_or_8_nv)
56 SET_SIZE(atomic_cas_32)
63 SET_SIZE(atomic_cas_64)
65 ENTRY(membar_producer)
68 SET_SIZE(membar_producer)