2008-11-03 10:25:10 +01:00
|
|
|
#
|
|
|
|
|
# ConvertAsm.py: Automatically generated from CopyMem.asm
|
|
|
|
|
#
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
#
|
2008-12-29 15:07:07 +01:00
|
|
|
# Copyright (c) 2006 - 2008, Intel Corporation
|
2008-11-03 10:25:10 +01:00
|
|
|
# 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 L0
|
|
|
|
|
cmp r9, rdi
|
|
|
|
|
jae L_CopyBackward # Copy backward if overlapped
|
|
|
|
|
L0:
|
|
|
|
|
mov rcx, r8
|
|
|
|
|
and r8, 7
|
|
|
|
|
shr rcx, 3 # rcx <- # of Qwords to copy
|
|
|
|
|
jz L_CopyBytes
|
|
|
|
|
movd r10, mm0 # (Save mm0 in r10)
|
|
|
|
|
L1:
|
|
|
|
|
movq mm0, [rsi]
|
|
|
|
|
movntq [rdi], mm0
|
|
|
|
|
add rsi, 8
|
|
|
|
|
add rdi, 8
|
|
|
|
|
loop L1
|
|
|
|
|
mfence
|
|
|
|
|
movd mm0, r10 # (Restore mm0)
|
|
|
|
|
jmp L_CopyBytes
|
|
|
|
|
L_CopyBackward:
|
|
|
|
|
mov rsi, r9 # rsi <- End of Source
|
|
|
|
|
lea rdi, [rdi + r8 - 1] # rdi <- End of Destination
|
|
|
|
|
std # set direction flag
|
|
|
|
|
L_CopyBytes:
|
|
|
|
|
mov rcx, r8
|
|
|
|
|
rep movsb # Copy bytes backward
|
|
|
|
|
cld
|
|
|
|
|
pop rdi
|
|
|
|
|
pop rsi
|
|
|
|
|
ret
|
