ArmPkg/Library/CompilerIntrinsicsLib/Arm/mullu.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 //
   5 // SPDX-License-Identifier: BSD-2-Clause-Patent
   6 //
   7 //------------------------------------------------------------------------------
   8
   9
  10   EXPORT  __ARM_ll_mullu
  11   EXPORT  __aeabi_lmul
  12
  13   AREA  Math, CODE, READONLY
  14
  15 ;
  16 ;INT64
  17 ;EFIAPI
  18 ;__aeabi_lmul (
  19 ;  IN INT64   Multiplicand
  20 ;  IN INT32   Multiplier
  21 ;  );
  22 ;
  23 __ARM_ll_mullu
  24   mov     r3, #0
  25 // Make upper part of INT64 Multiplier 0 and use __aeabi_lmul
  26
  27 ;
  28 ;INT64
  29 ;EFIAPI
  30 ;__aeabi_lmul (
  31 ;  IN INT64   Multiplicand
  32 ;  IN INT64   Multiplier
  33 ;  );
  34 ;
  35 __aeabi_lmul
  36   stmdb   sp!, {lr}
  37   mov     lr, r0
  38   umull   r0, ip, r2, lr
  39   mla     r1, r2, r1, ip
  40   mla     r1, r3, lr, r1
  41   ldmia   sp!, {pc}
  42
  43   END