1#------------------------------------------------------------------------------ 2# 3# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 4# 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 contain the same copy of this file: 23# 24# BaseMemoryLibRepStr 25# BaseMemoryLibMmx 26# BaseMemoryLibSse2 27# BaseMemoryLibOptDxe 28# BaseMemoryLibOptPei 29# 30#------------------------------------------------------------------------------ 31 32ASM_GLOBAL ASM_PFX(InternalMemCompareMem) 33 34#------------------------------------------------------------------------------ 35# INTN 36# EFIAPI 37# InternalMemCompareMem ( 38# IN CONST VOID *DestinationBuffer, 39# IN CONST VOID *SourceBuffer, 40# IN UINTN Length 41# ); 42#------------------------------------------------------------------------------ 43ASM_PFX(InternalMemCompareMem): 44 push %esi 45 push %edi 46 movl 12(%esp), %esi 47 movl 16(%esp), %edi 48 movl 20(%esp), %ecx 49 repe cmpsb 50 movzbl -1(%esi), %eax 51 movzbl -1(%edi), %edx 52 subl %edx, %eax 53 pop %edi 54 pop %esi 55 ret 56