[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / InterlockedCompareExchange32.S

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006 - 2008, 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
#   InterlockedCompareExchange32.S\r
#\r
# Abstract:\r
#\r
#   InternalSyncCompareExchange32 function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
.globl ASM_PFX(InternalSyncCompareExchange32)\r
\r
#------------------------------------------------------------------------------\r
# UINT32\r
# EFIAPI\r
# InternalSyncCompareExchange32 (\r
#   IN      UINT32                    *Value,\r
#   IN      UINT32                    CompareValue,\r
#   IN      UINT32                    ExchangeValue\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_PFX(InternalSyncCompareExchange32):\r
    movl    4(%esp), %ecx\r
    movl    8(%esp), %eax\r
    movl    12(%esp), %edx\r
    lock\r
    cmpxchgl    %edx, (%ecx)\r
    ret\r
Commit	Line	Data
e1f414b6	1	#------------------------------------------------------------------------------\r
e1f414b6	2	#\r
1f86b07d	3	# Copyright (c) 2006 - 2008, Intel Corporation\r
e1f414b6	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
1f86b07d	14	# InterlockedCompareExchange32.S\r
e1f414b6	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# InternalSyncCompareExchange32 function\r
	19	#\r
	20	# Notes:\r
	21	#\r
	22	#------------------------------------------------------------------------------\r
	23	\r
	24	.globl ASM_PFX(InternalSyncCompareExchange32)\r
	25	\r
	26	#------------------------------------------------------------------------------\r
	27	# UINT32\r
	28	# EFIAPI\r
	29	# InternalSyncCompareExchange32 (\r
	30	# IN UINT32 *Value,\r
	31	# IN UINT32 CompareValue,\r
	32	# IN UINT32 ExchangeValue\r
	33	# );\r
	34	#------------------------------------------------------------------------------\r
	35	ASM_PFX(InternalSyncCompareExchange32):\r
	36	movl 4(%esp), %ecx\r
	37	movl 8(%esp), %eax\r
	38	movl 12(%esp), %edx\r
	39	lock\r
	40	cmpxchgl %edx, (%ecx)\r
	41	ret\r