ArmPkg/Library/CompilerIntrinsicsLib/Arm/llsr.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_llsr
  17
  18     AREA    Math, CODE, READONLY
  19
  20 ;
  21 ;VOID
  22 ;EFIAPI
  23 ;__aeabi_llsr (
  24 ; IN  VOID    *Destination,
  25 ; IN  VOID    *Source,
  26 ; IN  UINT32  Size
  27 ; );
  28 ;
  29 __aeabi_llsr
  30     SUBS     r3,r2,#0x20
  31     BPL      {pc} + 0x18  ; 0x1c
  32     RSB      r3,r2,#0x20
  33     LSR      r0,r0,r2
  34     ORR      r0,r0,r1,LSL r3
  35     LSR      r1,r1,r2
  36     BX       lr
  37     LSR      r0,r1,r3
  38     MOV      r1,#0
  39     BX       lr
  40
  41     END
  42
  43
  44