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/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. */ .file "atomic.s" #define _ASM #include <sys/asm_linkage.h> ENTRY(atomic_add_64_nv) mov %rsi, %rax // %rax = delta addend lock xaddq %rsi, (%rdi) // %rsi = old value, (%rdi) = sum addq %rsi, %rax // new value = original value + delta ret SET_SIZE(atomic_add_64_nv) ENTRY(atomic_or_8_nv) movb (%rdi), %al // %al = old value 1: movb %sil, %cl orb %al, %cl // %cl = new value lock cmpxchgb %cl, (%rdi) // try to stick it in jne 1b movzbl %cl, %eax // return new value ret SET_SIZE(atomic_or_8_nv) ENTRY(atomic_cas_32) movl %esi, %eax lock cmpxchgl %edx, (%rdi) ret SET_SIZE(atomic_cas_32) ENTRY(atomic_cas_64) movq %rsi, %rax lock cmpxchgq %rdx, (%rdi) ret SET_SIZE(atomic_cas_64) ENTRY(membar_producer) sfence ret SET_SIZE(membar_producer)