ArmPkg/Library/CompilerIntrinsicsLib/Arm/ldivmod.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_ldivmod
  17     EXTERN  __aeabi_uldivmod
  18
  19     AREA    Math, CODE, READONLY
  20
  21 ;
  22 ;UINT32
  23 ;EFIAPI
  24 ;__aeabi_uidivmode (
  25 ;  IN UINT32  Dividen
  26 ;  IN UINT32  Divisor
  27 ;  );
  28 ;
  29
  30 __aeabi_ldivmod
  31     PUSH     {r4,lr}
  32     ASRS     r4,r1,#1
  33     EOR      r4,r4,r3,LSR #1
  34     BPL      {pc} + 0xc  ; 0x18
  35     RSBS     r0,r0,#0
  36     RSC      r1,r1,#0
  37     TST      r3,r3
  38     BPL      {pc} + 0xc  ; 0x28
  39     RSBS     r2,r2,#0
  40     RSC      r3,r3,#0
  41     BL       __aeabi_uldivmod  ;
  42     TST      r4,#0x40000000
  43     BEQ      {pc} + 0xc  ; 0x3c
  44     RSBS     r0,r0,#0
  45     RSC      r1,r1,#0
  46     TST      r4,#0x80000000
  47     BEQ      {pc} + 0xc  ; 0x4c
  48     RSBS     r2,r2,#0
  49     RSC      r3,r3,#0
  50     POP      {r4,pc}
  51
  52     END
  53
  54