284fb5c811
- Fixed memmove when going backward: the copy started one byte
after the end of the region to copy
- memset: - removed unused register
- fixed arguments size and character arguments were
actually reversed
- Added memmove() to ARM32 GCC
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16328 6f19259b-4bc3-4df7-8a09-765794883524
54 lines
1.3 KiB
NASM
Executable File
54 lines
1.3 KiB
NASM
Executable File
//------------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2011-2014, ARM Limited. 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.
|
|
//
|
|
//------------------------------------------------------------------------------
|
|
|
|
|
|
EXPORT __aeabi_memmove
|
|
|
|
AREA Memmove, CODE, READONLY
|
|
|
|
;
|
|
;VOID
|
|
;EFIAPI
|
|
;__aeabi_memmove (
|
|
; IN VOID *Destination,
|
|
; IN CONST VOID *Source,
|
|
; IN UINT32 Size
|
|
; );
|
|
;
|
|
__aeabi_memmove
|
|
CMP r2, #0
|
|
BXEQ lr
|
|
CMP r0, r1
|
|
BXEQ lr
|
|
BHI memmove_backward
|
|
|
|
memmove_forward
|
|
LDRB r3, [r1], #1
|
|
STRB r3, [r0], #1
|
|
SUBS r2, r2, #1
|
|
BNE memmove_forward
|
|
BX lr
|
|
|
|
memmove_backward
|
|
add r0, r2
|
|
add r1, r2
|
|
memmove_backward_loop
|
|
LDRB r3, [r1, #-1]!
|
|
STRB r3, [r0, #-1]!
|
|
SUBS r2, r2, #1
|
|
BNE memmove_backward_loop
|
|
BX lr
|
|
|
|
END
|