ArmPkg/Library/CompilerIntrinsicsLib/Arm/uwrite.S

   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 #include <AsmMacroIoLib.h>
  10
  11 #
  12 #UINT32
  13 #EFIAPI
  14 #__aeabi_uwrite4 (
  15 #  IN UINT32 Data,
  16 #  IN VOID   *Pointer
  17 #  );
  18 #
  19 ASM_FUNC(__aeabi_uwrite4)
  20     mov     r2, r0, lsr #8
  21     strb    r0, [r1]
  22     strb    r2, [r1, #1]
  23     mov     r2, r0, lsr #16
  24     strb    r2, [r1, #2]
  25     mov     r2, r0, lsr #24
  26     strb    r2, [r1, #3]
  27     bx      lr
  28
  29 #
  30 #UINT64
  31 #EFIAPI
  32 #__aeabi_uwrite8 (
  33 #  IN UINT64 Data,
  34 #  IN VOID   *Pointer
  35 #  );
  36 #
  37 ASM_FUNC(__aeabi_uwrite8)
  38     mov     r3, r0, lsr #8
  39     strb    r0, [r2]
  40     strb    r3, [r2, #1]
  41     mov     r3, r0, lsr #16
  42     strb    r3, [r2, #2]
  43     mov     r3, r0, lsr #24
  44     strb    r3, [r2, #3]
  45
  46     mov     r3, r1, lsr #8
  47     strb    r1, [r2, #4]
  48     strb    r3, [r2, #5]
  49     mov     r3, r1, lsr #16
  50     strb    r3, [r2, #6]
  51     mov     r3, r1, lsr #24
  52     strb    r3, [r2, #7]
  53     bx      lr