EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/MultU64x32.asm

   1 ; Copyright (c) 2004, Intel Corporation
   2 ; All rights reserved. This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   MultU64x32.asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   Calculate the product of a 64-bit integer and a 32-bit integer
  17 ;
  18 ;------------------------------------------------------------------------------
  19
  20     .386
  21     .model  flat,C
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ; UINT64
  26 ; EFIAPI
  27 ; InternalMathMultU64x32 (
  28 ;   IN      UINT64                    Multiplicand,
  29 ;   IN      UINT32                    Multiplier
  30 ;   );
  31 ;------------------------------------------------------------------------------
  32 InternalMathMultU64x32  PROC
  33     mov     ecx, [esp + 12]
  34     mov     eax, ecx
  35     imul    ecx, [esp + 8]              ; overflow not detectable
  36     mul     dword ptr [esp + 4]
  37     add     edx, ecx
  38     ret
  39 InternalMathMultU64x32  ENDP
  40
  41     END