MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / MultU64x32.c

/** @file\r
  Calculate the product of a 64-bit integer and a 32-bit integer\r
\r
  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
\r
\r
/**\r
  Multiples a 64-bit unsigned integer by a 32-bit unsigned integer\r
  and generates a 64-bit unsigned result.\r
\r
  This function multiples the 64-bit unsigned value Multiplicand by the 32-bit\r
  unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r
  bit unsigned result is returned.\r
\r
  @param  Multiplicand  A 64-bit unsigned value.\r
  @param  Multiplier    A 32-bit unsigned value.\r
\r
  @return Multiplicand * Multiplier\r
\r
**/\r
UINT64\r
EFIAPI\r
InternalMathMultU64x32 (\r
  IN      UINT64                    Multiplicand,\r
  IN      UINT32                    Multiplier\r
  )\r
{\r
  _asm {\r
    mov     ecx, Multiplier\r
    mov     eax, ecx\r
    imul    ecx, dword ptr [Multiplicand + 4]  // overflow not detectable\r
    mul     dword ptr [Multiplicand + 0]\r
    add     edx, ecx\r
  }\r
}\r
\r