1/* 2 * CDDL HEADER START 3 * 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. 7 * 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. 12 * 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] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 .file "atomic.s" 27 28#define _ASM 29#include <sys/asm_linkage.h> 30 31 ENTRY(atomic_add_64_nv) 32 mov %rsi, %rax // %rax = delta addend 33 lock 34 xaddq %rsi, (%rdi) // %rsi = old value, (%rdi) = sum 35 addq %rsi, %rax // new value = original value + delta 36 ret 37 SET_SIZE(atomic_add_64_nv) 38 39 ENTRY(atomic_or_8_nv) 40 movb (%rdi), %al // %al = old value 411: 42 movb %sil, %cl 43 orb %al, %cl // %cl = new value 44 lock 45 cmpxchgb %cl, (%rdi) // try to stick it in 46 jne 1b 47 movzbl %cl, %eax // return new value 48 ret 49 SET_SIZE(atomic_or_8_nv) 50 51 ENTRY(atomic_cas_32) 52 movl %esi, %eax 53 lock 54 cmpxchgl %edx, (%rdi) 55 ret 56 SET_SIZE(atomic_cas_32) 57 58 ENTRY(atomic_cas_64) 59 movq %rsi, %rax 60 lock 61 cmpxchgq %rdx, (%rdi) 62 ret 63 SET_SIZE(atomic_cas_64) 64 65 ENTRY(membar_producer) 66 sfence 67 ret 68 SET_SIZE(membar_producer) 69