#

# ConvertAsm.py: Automatically generated from CopyMem.asm

#

#------------------------------------------------------------------------------

#

# Copyright (c) 2006 - 2009, 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:

#

# CopyMem.S

#

# Abstract:

#

# CopyMem function

#

# Notes:

#

#------------------------------------------------------------------------------

#------------------------------------------------------------------------------

# VOID *

# EFIAPI

# InternalMemCopyMem (

# IN VOID *Destination,

# IN VOID *Source,

# IN UINTN Count

# )

#------------------------------------------------------------------------------

ASM_GLOBAL ASM_PFX(InternalMemCopyMem)

ASM_PFX(InternalMemCopyMem):

pushq %rsi

pushq %rdi

movq %rdx, %rsi # rsi <- Source

movq %rcx, %rdi # rdi <- Destination

leaq -1(%rsi, %r8,), %r9 # r9 <- End of Source

cmpq %rdi, %rsi

movq %rdi, %rax # rax <- Destination as return value

jae _InternalMemCopyMem_al_0000

cmpq %rdi, %r9

jae _atSym_CopyBackward # Copy backward if overlapped

_InternalMemCopyMem_al_0000:

movq %r8, %rcx

andq $7, %r8

shrq $3, %rcx

rep movsq # Copy as many Qwords as possible

jmp _atSym_CopyBytes

_atSym_CopyBackward:

movq %r9, %rsi # rsi <- End of Source

leaq -1(%rdi, %r8), %rdi # rdi <- End of Destination

std # set direction flag

_atSym_CopyBytes:

movq %r8, %rcx

rep movsb # Copy bytes backward

cld

popq %rdi

popq %rsi

ret