1 #------------------------------------------------------------------------------
3 # CopyMem() worker for ARM
5 # This file started out as C code that did 64 bit moves if the buffer was
6 # 32-bit aligned, else it does a byte copy. It also does a byte copy for
7 # any trailing bytes. Update using VSTM/SLDM to do 128 byte copies.
9 # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
10 # This program and the accompanying materials
11 # are licensed and made available under the terms and conditions of the BSD License
12 # which accompanies this distribution. The full text of the license may be found at
13 # http://opensource.org/licenses/bsd-license.php
15 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
16 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 #------------------------------------------------------------------------------
21 Copy Length bytes from Source to Destination. Overlap is OK.
25 @param Destination Target of copy
26 @param Source Place to copy from
27 @param Length Number of bytes to copy
35 OUT VOID *DestinationBuffer,
36 IN CONST VOID *SourceBuffer,
42 GCC_ASM_EXPORT(InternalMemCopyMem)
44 ASM_PFX(InternalMemCopyMem):
45 stmfd sp!, {r4, r9, lr}
102 sub ip, ip, #128 // 32
112 ldmfd sp!, {r4, r9, pc}