ArmPkg/Library/CompilerIntrinsicsLib/Arm/uwrite.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_uwrite4
  17
  18     AREA  Uwrite4, CODE, READONLY
  19
  20 ;
  21 ;UINT32
  22 ;EFIAPI
  23 ;__aeabi_uwrite4 (
  24 ;  IN UINT32 Data,
  25 ;  IN VOID   *Pointer
  26 ;  );
  27 ;
  28 ;
  29 __aeabi_uwrite4
  30     mov     r2, r0, lsr #8
  31     strb    r0, [r1]
  32     strb    r2, [r1, #1]
  33     mov     r2, r0, lsr #16
  34     strb    r2, [r1, #2]
  35     mov     r2, r0, lsr #24
  36     strb    r2, [r1, #3]
  37     bx      lr
  38
  39     END
  40