ArmPkg/Library/CompilerIntrinsicsLib/Arm/uread.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 //
   5 // 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
  17
  18     INCLUDE AsmMacroExport.inc
  19
  20 ;
  21 ;UINT32
  22 ;EFIAPI
  23 ;__aeabi_uread4 (
  24 ;  IN VOID   *Pointer
  25 ;  );
  26 ;
  27  RVCT_ASM_EXPORT __aeabi_uread4
  28     ldrb    r1, [r0]
  29     ldrb    r2, [r0, #1]
  30     ldrb    r3, [r0, #2]
  31     ldrb    r0, [r0, #3]
  32     orr     r1, r1, r2, lsl #8
  33     orr     r1, r1, r3, lsl #16
  34     orr     r0, r1, r0, lsl #24
  35     bx      lr
  36
  37 ;
  38 ;UINT64
  39 ;EFIAPI
  40 ;__aeabi_uread8 (
  41 ;  IN VOID   *Pointer
  42 ;  );
  43 ;
  44  RVCT_ASM_EXPORT __aeabi_uread8
  45     mov     r3, r0
  46
  47     ldrb    r1, [r3]
  48     ldrb    r2, [r3, #1]
  49     orr     r1, r1, r2, lsl #8
  50     ldrb    r2, [r3, #2]
  51     orr     r1, r1, r2, lsl #16
  52     ldrb    r0, [r3, #3]
  53     orr     r0, r1, r0, lsl #24
  54
  55     ldrb    r1, [r3, #4]
  56     ldrb    r2, [r3, #5]
  57     orr     r1, r1, r2, lsl #8
  58     ldrb    r2, [r3, #6]
  59     orr     r1, r1, r2, lsl #16
  60     ldrb    r2, [r3, #7]
  61     orr     r1, r1, r2, lsl #24
  62
  63     bx      lr
  64     END