[mirror_edk2.git] / MdePkg / Library / BaseLib / ia32 / InterlockedCompareExchange32.s

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006, 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.Asm\r
#\r
# Abstract:\r
#\r
#   InterlockedCompareExchange32 function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
\r
\r
     \r
\r
#------------------------------------------------------------------------------\r
# VOID *\r
# EFIAPI\r
# InterlockedCompareExchangePointer (\r
#   IN      VOID                      **Value,\r
#   IN      VOID                      *CompareValue,\r
#   IN      VOID                      *ExchangeValue\r
#   );\r
#------------------------------------------------------------------------------\r
.global _InterlockedCompareExchangePointer\r
_InterlockedCompareExchangePointer: \r
    #\r
    # InterlockedCompareExchangePointer() shares the same code as\r
    # InterlockedCompareExchange32() on IA32 and thus no code inside this\r
    # function\r
    #\r
\r
\r
#------------------------------------------------------------------------------\r
# UINT32\r
# EFIAPI\r
# InterlockedCompareExchange32 (\r
#   IN      UINT32                    *Value,\r
#   IN      UINT32                    CompareValue,\r
#   IN      UINT32                    ExchangeValue\r
#   );\r
#------------------------------------------------------------------------------\r
.global _InterlockedCompareExchange32\r
_InterlockedCompareExchange32: \r
    movl    4(%esp),%ecx\r
    movl    8(%esp),%eax\r
    movl    12(%esp),%edx\r
    lock    cmpxchgl %edx,(%ecx)\r
    ret\r
\r
\r
\r
Commit	Line	Data
878ddf1f	1	#------------------------------------------------------------------------------\r
	2	#\r
	3	# Copyright (c) 2006, Intel Corporation\r
	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	# InterlockedCompareExchange32.Asm\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# InterlockedCompareExchange32 function\r
	19	#\r
	20	# Notes:\r
	21	#\r
	22	#------------------------------------------------------------------------------\r
	23	\r
	24	\r
	25	\r
	26	\r
	27	\r
	28	#------------------------------------------------------------------------------\r
	29	# VOID *\r
	30	# EFIAPI\r
	31	# InterlockedCompareExchangePointer (\r
	32	# IN VOID **Value,\r
	33	# IN VOID *CompareValue,\r
	34	# IN VOID *ExchangeValue\r
	35	# );\r
	36	#------------------------------------------------------------------------------\r
	37	.global _InterlockedCompareExchangePointer\r
	38	_InterlockedCompareExchangePointer: \r
	39	#\r
	40	# InterlockedCompareExchangePointer() shares the same code as\r
	41	# InterlockedCompareExchange32() on IA32 and thus no code inside this\r
	42	# function\r
	43	#\r
	44	\r
	45	\r
	46	#------------------------------------------------------------------------------\r
	47	# UINT32\r
	48	# EFIAPI\r
	49	# InterlockedCompareExchange32 (\r
	50	# IN UINT32 *Value,\r
	51	# IN UINT32 CompareValue,\r
	52	# IN UINT32 ExchangeValue\r
	53	# );\r
	54	#------------------------------------------------------------------------------\r
	55	.global _InterlockedCompareExchange32\r
	56	_InterlockedCompareExchange32: \r
	57	movl 4(%esp),%ecx\r
	58	movl 8(%esp),%eax\r
	59	movl 12(%esp),%edx\r
	60	lock cmpxchgl %edx,(%ecx)\r
	61	ret\r
	62	\r
	63	\r
	64	\r