audk/MdePkg/Library/BaseLib/Ia32/MultU64x32.c

/** @file
  Calculate the product of a 64-bit integer and a 32-bit integer

  Copyright (c) 2006 - 2007, Intel Corporation<BR>
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

//
// Include common header file for this module.
//


UINT64
EFIAPI
InternalMathMultU64x32 (
  IN      UINT64                    Multiplicand,
  IN      UINT32                    Multiplier
  )
{
  _asm {
    mov     ecx, Multiplier
    mov     eax, ecx
    imul    ecx, dword ptr [Multiplicand + 4]  // overflow not detectable
    mul     dword ptr [Multiplicand + 0]
    add     edx, ecx
  }
}