audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memcpy.asm

42 lines
1.0 KiB
NASM

//------------------------------------------------------------------------------
//
// Copyright (c) 2008 - 2009, Apple Inc. 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.
//
//------------------------------------------------------------------------------
EXPORT __aeabi_memcpy
AREA Memcpy, CODE, READONLY
;
;VOID
;EFIAPI
;__aeabi_memcpy (
; IN VOID *Destination,
; IN VOID *Source,
; IN UINT32 Size
; );
;
__aeabi_memcpy
cmp r2, #0
bxeq lr
push {lr}
mov lr, r0
L5
ldrb r3, [r1], #1
strb r3, [lr], #1
subs r2, r2, #1
bne L5
pop {pc}
END