ArmPkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.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     EXTERN  __aeabi_uldivmod
  17
  18     INCLUDE AsmMacroExport.inc
  19
  20 ;
  21 ;UINT32
  22 ;EFIAPI
  23 ;__aeabi_uidivmode (
  24 ;  IN UINT32  Dividen
  25 ;  IN UINT32  Divisor
  26 ;  );
  27 ;
  28
  29  RVCT_ASM_EXPORT __aeabi_ldivmod
  30     PUSH     {r4,lr}
  31     ASRS     r4,r1,#1
  32     EOR      r4,r4,r3,LSR #1
  33     BPL      L_Test1
  34     RSBS     r0,r0,#0
  35     RSC      r1,r1,#0
  36 L_Test1
  37     TST      r3,r3
  38     BPL      L_Test2
  39     RSBS     r2,r2,#0
  40     RSC      r3,r3,#0
  41 L_Test2
  42     BL       __aeabi_uldivmod  ;
  43     TST      r4,#0x40000000
  44     BEQ      L_Test3
  45     RSBS     r0,r0,#0
  46     RSC      r1,r1,#0
  47 L_Test3
  48     TST      r4,#0x80000000
  49     BEQ      L_Exit
  50     RSBS     r2,r2,#0
  51     RSC      r3,r3,#0
  52 L_Exit
  53     POP      {r4,pc}
  54
  55     END
  56
  57