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#------------------------------------------------------------------------------
#
# Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
# 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:
#
# EfiCopyMemRep1.S
#
# Abstract:
#
# CopyMem function
#
# Notes:
#
#------------------------------------------------------------------------------
#include <EfiBind.h>
.code:
.globl ASM_PFX(EfiCommonLibCopyMem)
#------------------------------------------------------------------------------
# VOID
# EfiCommonLibCopyMem (
# OUT VOID *Destination,
# IN VOID *Source,
# IN UINTN Count
# );
#------------------------------------------------------------------------------
ASM_PFX(EfiCommonLibCopyMem):
push %rsi
push %rdi
cmp %rcx,%rdx
je CopyMemDone
cmp $0x0,%r8
je CopyMemDone
mov %rdx,%rsi
mov %rcx,%rdi
lea -1(%r8,%rsi,1),%r9
cmp %rdi,%rsi
jae CopyBytes
cmp %rdi,%r9
jb CopyBytes
mov %r9,%rsi
lea -1(%r8,%rdi,1),%rdi
std
CopyBytes:
mov %r8,%rcx
rep movsb %ds:(%rsi),%es:(%rdi)
cld
CopyMemDone:
pop %rdi
pop %rsi
retq
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