ArmPkg/Library/CompilerIntrinsicsLib/Arm/llsr.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     INCLUDE AsmMacroExport.inc
  18
  19 ;
  20 ;VOID
  21 ;EFIAPI
  22 ;__aeabi_llsr (
  23 ; IN  VOID    *Destination,
  24 ; IN  VOID    *Source,
  25 ; IN  UINT32  Size
  26 ; );
  27 ;
  28  RVCT_ASM_EXPORT __aeabi_llsr
  29     SUBS     r3,r2,#0x20
  30     BPL      {pc} + 0x18  ; 0x1c
  31     RSB      r3,r2,#0x20
  32     LSR      r0,r0,r2
  33     ORR      r0,r0,r1,LSL r3
  34     LSR      r1,r1,r2
  35     BX       lr
  36     LSR      r0,r1,r3
  37     MOV      r1,#0
  38     BX       lr
  39
  40     END
  41
  42
  43