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Commit	Line	Data
	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
	39	1:
	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
	61	1:
	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
	82	1:
	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
	100	1:
	101	#endif
	102	lock
	103	xaddl %edi, (%rsi) #; Atomic exchange and add
	104	movl %edi, %eax;
	105	ret