[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / X64 / InterlockedCompareExchange64.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
#   InterlockedCompareExchange64.S
#
# Abstract:
#
#   InterlockedCompareExchange64 function
#
# Notes:
#
#------------------------------------------------------------------------------

#include <EdkIIGlueBase.h>
#------------------------------------------------------------------------------
# UINT64
# EFIAPI
# InterlockedCompareExchange64 (
#   IN      UINT64                    *Value,
#   IN      UINT64                    CompareValue,
#   IN      UINT64                    ExchangeValue
#   );
#------------------------------------------------------------------------------
.globl ASM_PFX(InternalSyncCompareExchange64)
ASM_PFX(InternalSyncCompareExchange64):
    mov     %rsi, %rax
    lock    cmpxchg %rdx,(%rdi)
    ret
Commit	Line	Data
e8de4680 A	1	#------------------------------------------------------------------------------
e8de4680 A	2	#
2c7e5c2f HT	3	# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
2c7e5c2f HT	4	# This program and the accompanying materials
e8de4680 A	5	# are licensed and made available under the terms and conditions of the BSD License
	6	# which accompanies this distribution. The full text of the license may be found at
	7	# http://opensource.org/licenses/bsd-license.php
	8	#
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	11	#
	12	# Module Name:
	13	#
	14	# InterlockedCompareExchange64.S
	15	#
	16	# Abstract:
	17	#
	18	# InterlockedCompareExchange64 function
	19	#
	20	# Notes:
	21	#
	22	#------------------------------------------------------------------------------
	23
	24	#include <EdkIIGlueBase.h>
	25	#------------------------------------------------------------------------------
	26	# UINT64
	27	# EFIAPI
	28	# InterlockedCompareExchange64 (
	29	# IN UINT64 *Value,
	30	# IN UINT64 CompareValue,
	31	# IN UINT64 ExchangeValue
	32	# );
	33	#------------------------------------------------------------------------------
	34	.globl ASM_PFX(InternalSyncCompareExchange64)
	35	ASM_PFX(InternalSyncCompareExchange64):
	36	mov %rsi, %rax
	37	lock cmpxchg %rdx,(%rdi)
	38	ret