ArmPkg/Library/CompilerIntrinsicsLib/Arm/ashrdi3.S

   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 #include <AsmMacroIoLib.h>
  16
  17 ASM_FUNC(__ashrdi3)
  18   cmp  r2, #31
  19   bls  L2
  20   cmp  r2, #63
  21   subls  r2, r2, #32
  22   mov  ip, r1, asr #31
  23   movls  r2, r1, asr r2
  24   movhi  r2, ip
  25   mov  r0, r2
  26   mov  r1, ip
  27   bx  lr
  28 L2:
  29   cmp  r2, #0
  30   rsbne  r3, r2, #32
  31   movne  r3, r1, asl r3
  32   movne  r1, r1, asr r2
  33   orrne  r0, r3, r0, lsr r2
  34   bx  lr