ArmPkg/Library/CompilerIntrinsicsLib/Arm/uread.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 //
   5 // SPDX-License-Identifier: BSD-2-Clause-Patent
   6 //
   7 //------------------------------------------------------------------------------
   8
   9
  10
  11
  12     INCLUDE AsmMacroExport.inc
  13
  14 ;
  15 ;UINT32
  16 ;EFIAPI
  17 ;__aeabi_uread4 (
  18 ;  IN VOID   *Pointer
  19 ;  );
  20 ;
  21  RVCT_ASM_EXPORT __aeabi_uread4
  22     ldrb    r1, [r0]
  23     ldrb    r2, [r0, #1]
  24     ldrb    r3, [r0, #2]
  25     ldrb    r0, [r0, #3]
  26     orr     r1, r1, r2, lsl #8
  27     orr     r1, r1, r3, lsl #16
  28     orr     r0, r1, r0, lsl #24
  29     bx      lr
  30
  31 ;
  32 ;UINT64
  33 ;EFIAPI
  34 ;__aeabi_uread8 (
  35 ;  IN VOID   *Pointer
  36 ;  );
  37 ;
  38  RVCT_ASM_EXPORT __aeabi_uread8
  39     mov     r3, r0
  40
  41     ldrb    r1, [r3]
  42     ldrb    r2, [r3, #1]
  43     orr     r1, r1, r2, lsl #8
  44     ldrb    r2, [r3, #2]
  45     orr     r1, r1, r2, lsl #16
  46     ldrb    r0, [r3, #3]
  47     orr     r0, r1, r0, lsl #24
  48
  49     ldrb    r1, [r3, #4]
  50     ldrb    r2, [r3, #5]
  51     orr     r1, r1, r2, lsl #8
  52     ldrb    r2, [r3, #6]
  53     orr     r1, r1, r2, lsl #16
  54     ldrb    r2, [r3, #7]
  55     orr     r1, r1, r2, lsl #24
  56
  57     bx      lr
  58     END