ArmPkg/Library/CompilerIntrinsicsLib/Arm/mullu.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        __ARM_ll_mullu
  17   EXPORT        __aeabi_lmul
  18
  19   AREA  Math, CODE, READONLY
  20
  21 ;
  22 ;INT64
  23 ;EFIAPI
  24 ;__aeabi_lmul (
  25 ;  IN INT64   Multiplicand
  26 ;  IN INT32   Multiplier
  27 ;  );
  28 ;
  29 __ARM_ll_mullu
  30   mov     r3, #0
  31 // Make upper part of INT64 Multiplier 0 and use __aeabi_lmul
  32
  33 ;
  34 ;INT64
  35 ;EFIAPI
  36 ;__aeabi_lmul (
  37 ;  IN INT64   Multiplicand
  38 ;  IN INT64   Multiplier
  39 ;  );
  40 ;
  41 __aeabi_lmul
  42   stmdb   sp!, {lr}
  43   mov     lr, r0
  44   umull   r0, ip, r2, lr
  45   mla     r1, r2, r1, ip
  46   mla     r1, r3, lr, r1
  47   ldmia   sp!, {pc}
  48
  49   END