MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / DivU64x32.c

/** @file\r
  Calculate the quotient of a 64-bit integer by a 32-bit integer\r
\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
\r
\r
/**\r
  Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r
  generates a 64-bit unsigned result.\r
\r
  This function divides the 64-bit unsigned value Dividend by the 32-bit\r
  unsigned value Divisor and generates a 64-bit unsigned quotient. This\r
  function returns the 64-bit unsigned quotient.\r
\r
  @param  Dividend  A 64-bit unsigned value.\r
  @param  Divisor   A 32-bit unsigned value.\r
\r
  @return Dividend / Divisor\r
\r
**/\r
UINT64\r
EFIAPI\r
InternalMathDivU64x32 (\r
  IN      UINT64                    Dividend,\r
  IN      UINT32                    Divisor\r
  )\r
{\r
  _asm {\r
    mov     eax, dword ptr [Dividend + 4]\r
    mov     ecx, Divisor\r
    xor     edx, edx\r
    div     ecx\r
    push    eax                     ; save quotient on stack\r
    mov     eax, dword ptr [Dividend]\r
    div     ecx\r
    pop     edx                     ; restore high-order dword of the quotient\r
  }\r
}\r
\r