[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibRepStr / Ia32 / CompareMem.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006, Intel Corporation
# All rights reserved. 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:
#
#   CompareMem.Asm
#
# Abstract:
#
#   CompareMem function
#
# Notes:
#
#   The following BaseMemoryLib instances share the same version of this file:
#
#       BaseMemoryLibRepStr
#       BaseMemoryLibMmx
#       BaseMemoryLibSse2
#
#------------------------------------------------------------------------------

.global _InternalMemCompareMem

#------------------------------------------------------------------------------
# INTN
# EFIAPI
# InternalMemCompareMem (
#   IN      CONST VOID                *DestinationBuffer,
#   IN      CONST VOID                *SourceBuffer,
#   IN      UINTN                     Length
#   );
#------------------------------------------------------------------------------
_InternalMemCompareMem:
    push    %esi
    push    %edi
    movl    12(%esp), %esi
    movl    16(%esp), %edi
    movl    20(%esp), %ecx
    repe    cmpsb
    movzbl  -1(%esi), %eax
    movzbl  -1(%edi), %edx
    subl    %edx, %eax
    pop     %edi
    pop     %esi
    ret
Commit	Line	Data
b6bd81d4	1	#------------------------------------------------------------------------------
	2	#
	3	# Copyright (c) 2006, Intel Corporation
	4	# All rights reserved. This program and the accompanying materials
	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	# CompareMem.Asm
	15	#
	16	# Abstract:
	17	#
	18	# CompareMem function
	19	#
	20	# Notes:
	21	#
	22	# The following BaseMemoryLib instances share the same version of this file:
	23	#
	24	# BaseMemoryLibRepStr
	25	# BaseMemoryLibMmx
	26	# BaseMemoryLibSse2
	27	#
	28	#------------------------------------------------------------------------------
	29
37867477	30	.global _InternalMemCompareMem
eb227e96	31
	32	#------------------------------------------------------------------------------
	33	# INTN
	34	# EFIAPI
	35	# InternalMemCompareMem (
	36	# IN CONST VOID *DestinationBuffer,
	37	# IN CONST VOID *SourceBuffer,
	38	# IN UINTN Length
	39	# );
	40	#------------------------------------------------------------------------------
37867477	41	_InternalMemCompareMem:
b6bd81d4	42	push %esi
b6bd81d4	43	push %edi
eb227e96	44	movl 12(%esp), %esi
	45	movl 16(%esp), %edi
	46	movl 20(%esp), %ecx
b6bd81d4	47	repe cmpsb
	48	movzbl -1(%esi), %eax
	49	movzbl -1(%edi), %edx
eb227e96	50	subl %edx, %eax
b6bd81d4	51	pop %edi
	52	pop %esi
	53	ret