MdePkg/Library/BaseMemoryLibSse2/Ia32/CompareMem.S File Reference


Detailed Description

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, 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 contain the same copy of this file:
#
# BaseMemoryLibRepStr
# BaseMemoryLibMmx
# BaseMemoryLibSse2
# BaseMemoryLibOptDxe
# BaseMemoryLibOptPei
#
#------------------------------------------------------------------------------

ASM_GLOBAL ASM_PFX(InternalMemCompareMem)

#------------------------------------------------------------------------------
# INTN
# EFIAPI
# InternalMemCompareMem (
# IN CONST VOID *DestinationBuffer,
# IN CONST VOID *SourceBuffer,
# IN UINTN Length
# );
#------------------------------------------------------------------------------
ASM_PFX(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


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