[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibRepStr / Ia32 / CompareMem.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
#   CompareMem.Asm\r
#\r
# Abstract:\r
#\r
#   CompareMem function\r
#\r
# Notes:\r
#\r
#   The following BaseMemoryLib instances contain the same copy of this file:\r
#\r
#       BaseMemoryLibRepStr\r
#       BaseMemoryLibMmx\r
#       BaseMemoryLibSse2\r
#       BaseMemoryLibOptDxe\r
#       BaseMemoryLibOptPei\r
#\r
#------------------------------------------------------------------------------\r
\r
.globl _InternalMemCompareMem\r
\r
#------------------------------------------------------------------------------\r
# INTN\r
# EFIAPI\r
# InternalMemCompareMem (\r
#   IN      CONST VOID                *DestinationBuffer,\r
#   IN      CONST VOID                *SourceBuffer,\r
#   IN      UINTN                     Length\r
#   );\r
#------------------------------------------------------------------------------\r
_InternalMemCompareMem:\r
    push    %esi\r
    push    %edi\r
    movl    12(%esp), %esi\r
    movl    16(%esp), %edi\r
    movl    20(%esp), %ecx\r
    repe    cmpsb\r
    movzbl  -1(%esi), %eax\r
    movzbl  -1(%edi), %edx\r
    subl    %edx, %eax\r
    pop     %edi\r
    pop     %esi\r
    ret\r
Commit	Line	Data
b1ff428c	1	#------------------------------------------------------------------------------\r
b1ff428c	2	#\r
373ade0e	3	# Copyright (c) 2006 - 2008, Intel Corporation\r
b1ff428c	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	# CompareMem.Asm\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# CompareMem function\r
	19	#\r
	20	# Notes:\r
	21	#\r
	22	# The following BaseMemoryLib instances contain the same copy of this file:\r
	23	#\r
	24	# BaseMemoryLibRepStr\r
	25	# BaseMemoryLibMmx\r
	26	# BaseMemoryLibSse2\r
	27	# BaseMemoryLibOptDxe\r
	28	# BaseMemoryLibOptPei\r
	29	#\r
	30	#------------------------------------------------------------------------------\r
	31	\r
	32	.globl _InternalMemCompareMem\r
	33	\r
	34	#------------------------------------------------------------------------------\r
	35	# INTN\r
	36	# EFIAPI\r
	37	# InternalMemCompareMem (\r
	38	# IN CONST VOID *DestinationBuffer,\r
	39	# IN CONST VOID *SourceBuffer,\r
	40	# IN UINTN Length\r
	41	# );\r
	42	#------------------------------------------------------------------------------\r
	43	_InternalMemCompareMem:\r
	44	push %esi\r
	45	push %edi\r
	46	movl 12(%esp), %esi\r
	47	movl 16(%esp), %edi\r
	48	movl 20(%esp), %ecx\r
	49	repe cmpsb\r
	50	movzbl -1(%esi), %eax\r
	51	movzbl -1(%edi), %edx\r
	52	subl %edx, %eax\r
	53	pop %edi\r
	54	pop %esi\r
	55	ret\r