mirror of https://github.com/acidanthera/audk.git
68 lines
2.2 KiB
ArmAsm
68 lines
2.2 KiB
ArmAsm
#
|
|
# ConvertAsm.py: Automatically generated from CopyMem.asm
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
#
|
|
# 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:
|
|
#
|
|
# CopyMem.S
|
|
#
|
|
# Abstract:
|
|
#
|
|
# CopyMem function
|
|
#
|
|
# Notes:
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# VOID *
|
|
# EFIAPI
|
|
# InternalMemCopyMem (
|
|
# IN VOID *Destination,
|
|
# IN VOID *Source,
|
|
# IN UINTN Count
|
|
# )
|
|
#------------------------------------------------------------------------------
|
|
.intel_syntax noprefix
|
|
.globl ASM_PFX(InternalMemCopyMem)
|
|
ASM_PFX(InternalMemCopyMem):
|
|
push rsi
|
|
push rdi
|
|
mov rsi, rdx # rsi <- Source
|
|
mov rdi, rcx # rdi <- Destination
|
|
lea r9, [rsi + r8 - 1] # r9 <- End of Source
|
|
cmp rsi, rdi
|
|
mov rax, rdi # rax <- Destination as return value
|
|
jae _InternalMemCopyMem_al_0000
|
|
cmp r9, rdi
|
|
jae _atSym_CopyBackward # Copy backward if overlapped
|
|
_InternalMemCopyMem_al_0000:
|
|
mov rcx, r8
|
|
and r8, 7
|
|
shr rcx, 3
|
|
rep movsq # Copy as many Qwords as possible
|
|
jmp _atSym_CopyBytes
|
|
_atSym_CopyBackward:
|
|
mov rsi, r9 # rsi <- End of Source
|
|
lea rdi, [rdi + r8 - 1] # esi <- End of Destination
|
|
std # set direction flag
|
|
_atSym_CopyBytes:
|
|
mov rcx, r8
|
|
rep movsb # Copy bytes backward
|
|
cld
|
|
pop rdi
|
|
pop rsi
|
|
ret
|
|
|