1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29#;*************************************************************************** 30#;* Boolean OSCompareAndSwap(SInt32 oldValue, SInt32 newValue, SInt32 *ptr) * 31#;*************************************************************************** 32 33 .globl _OSCompareAndSwap 34_OSCompareAndSwap: #;oldValue, newValue, ptr 35#if DEBUG 36 test $3, %rdx 37 jz 1f 38 ud2 391: 40#endif 41 movl %edi, %eax 42 lock 43 cmpxchgl %esi, (%rdx) #; CAS (eax is an implicit operand) 44 sete %al #; did CAS succeed? (TZ=1) 45 movzbq %al, %rax #; clear out the high bytes 46 ret 47 48#;***************************************************************************** 49#;* Boolean OSCompareAndSwap64(SInt64 oldValue, SInt64 newValue, SInt64 *ptr) * 50#;***************************************************************************** 51 52 .globl _OSCompareAndSwap64 53 .globl _OSCompareAndSwapPtr 54 55_OSCompareAndSwap64: 56_OSCompareAndSwapPtr: #;oldValue, newValue, ptr 57#if DEBUG 58 test $7, %rdx 59 jz 1f 60 ud2 611: 62#endif 63 movq %rdi, %rax 64 lock 65 cmpxchgq %rsi, (%rdx) #; CAS (rax is an implicit operand) 66 sete %al #; did CAS succeed? (TZ=1) 67 movzbq %al, %rax #; clear out the high bytes 68 ret 69 70#;******************************************************* 71#;* SInt64 OSAddAtomic64(SInt64 theAmount, SInt64 *ptr) * 72#;******************************************************* 73 74 .globl _OSAddAtomicLong 75 .globl _OSAddAtomic64 76_OSAddAtomic64: 77_OSAddAtomicLong: 78#if DEBUG 79 test $7, %rsi 80 jz 1f 81 ud2 821: 83#endif 84 lock 85 xaddq %rdi, (%rsi) #; Atomic exchange and add 86 movq %rdi, %rax; 87 ret 88 89 90#;******************************************************* 91#; SInt32 OSAddAtomic(SInt32 delta, SInt32 *address) 92#;******************************************************* 93 94 .globl _OSAddAtomic 95_OSAddAtomic: 96#if DEBUG 97 test $3, %rsi 98 jz 1f 99 ud2 1001: 101#endif 102 lock 103 xaddl %edi, (%rsi) #; Atomic exchange and add 104 movl %edi, %eax; 105 ret 106