ArmPkg/Library/CompilerIntrinsicsLib/Arm/memcpy.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008-2009 Apple Inc. All rights reserved.
   4 //
   5 // All rights reserved. This program and the accompanying materials
   6 // are licensed and made available under the terms and conditions of the BSD License
   7 // which accompanies this distribution.  The full text of the license may be found at
   8 // http://opensource.org/licenses/bsd-license.php
   9 //
  10 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 //
  13 //------------------------------------------------------------------------------
  14
  15
  16     EXPORT  __aeabi_memcpy
  17
  18     AREA    Memcpy, CODE, READONLY
  19
  20 ;
  21 ;VOID
  22 ;EFIAPI
  23 ;__aeabi_memcpy (
  24 ; IN  VOID    *Destination,
  25 ; IN  VOID    *Source,
  26 ; IN  UINT32  Size
  27 ; );
  28 ;
  29 __aeabi_memcpy
  30     CMP     r2, #0
  31     BXEQ    r14
  32 loop
  33     LDRB    r3, [r1], #1
  34     STRB    r3, [r0], #1
  35     SUBS    r2, r2, #1
  36     BXEQ    r14
  37     B       loop
  38
  39     END
  40