Port a couple of files to gnu assembly.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2001 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
bbahnsen
2006-11-23 00:22:20 +00:00
parent 45a6b8074a
commit 02ad42aed8
2 changed files with 124 additions and 0 deletions

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#------------------------------------------------------------------------------
#
# 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
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# INTN
# EFIAPI
# InternalMemCompareMem (
# IN CONST VOID *DestinationBuffer,
# IN CONST VOID *SourceBuffer,
# IN UINTN Length
# );
#------------------------------------------------------------------------------
.global _InternalMemCompareMem;
_InternalMemCompareMem:
push %rsi
push %rdi
mov %rcx, %rsi
mov %rdx, %rdi
mov %r8, %rcx
repe cmpsb
movzbq -1(%rsi), %rax
movzbq -1(%rdi), %rdx
sub %rdx, %rax
pop %rdi
pop %rsi
ret