[mirror_edk2.git] / MdePkg / Library / BaseSynchronizationLib / X64 / InterlockedCompareExchange64.S

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006 - 2009, Intel Corporation\r
# All rights reserved. This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
# Module Name:\r
#\r
#   InterlockedCompareExchange64.S\r
#\r
# Abstract:\r
#\r
#   InterlockedCompareExchange64 function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
\r
#------------------------------------------------------------------------------\r
# UINT64\r
# EFIAPI\r
# InterlockedCompareExchange64 (\r
#   IN      UINT64                    *Value,\r
#   IN      UINT64                    CompareValue,\r
#   IN      UINT64                    ExchangeValue\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_GLOBAL ASM_PFX(InternalSyncCompareExchange64)\r
ASM_PFX(InternalSyncCompareExchange64):\r
    mov     %rdx, %rax\r
    lock/cmpxchg %r8,(%rcx)\r
    ret\r
Commit	Line	Data
720d3c5f	1	#------------------------------------------------------------------------------\r
720d3c5f	2	#\r
0da835f9	3	# Copyright (c) 2006 - 2009, Intel Corporation\r
720d3c5f	4	# All rights reserved. This program and the accompanying materials\r
	5	# are licensed and made available under the terms and conditions of the BSD License\r
	6	# which accompanies this distribution. The full text of the license may be found at\r
	7	# http://opensource.org/licenses/bsd-license.php\r
	8	#\r
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	11	#\r
	12	# Module Name:\r
	13	#\r
	14	# InterlockedCompareExchange64.S\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# InterlockedCompareExchange64 function\r
	19	#\r
	20	# Notes:\r
	21	#\r
	22	#------------------------------------------------------------------------------\r
	23	\r
	24	\r
	25	#------------------------------------------------------------------------------\r
	26	# UINT64\r
	27	# EFIAPI\r
	28	# InterlockedCompareExchange64 (\r
	29	# IN UINT64 *Value,\r
	30	# IN UINT64 CompareValue,\r
	31	# IN UINT64 ExchangeValue\r
	32	# );\r
	33	#------------------------------------------------------------------------------\r
d5172f91	34	ASM_GLOBAL ASM_PFX(InternalSyncCompareExchange64)\r
720d3c5f	35	ASM_PFX(InternalSyncCompareExchange64):\r
720d3c5f	36	mov %rdx, %rax\r
64674889	37	lock/cmpxchg %r8,(%rcx)\r
720d3c5f	38	ret\r