MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.c

   1 /** @file
   2   Set error flag for all division functions
   3
   4   Copyright (c) 2006 - 2007, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 //
  16 // Include common header file for this module.
  17 //
  18 #include "CommonHeader.h"
  19
  20 UINT64
  21 EFIAPI
  22 InternalMathDivRemU64x32 (
  23   IN      UINT64                    Dividend,
  24   IN      UINT32                    Divisor,
  25   OUT     UINT32                    *Remainder
  26   )
  27 {
  28   _asm {
  29     mov     ecx, Divisor
  30     mov     eax, dword ptr [Dividend + 4]
  31     xor     edx, edx
  32     div     ecx
  33     push    eax
  34     mov     eax, dword ptr [Dividend + 0]
  35     div     ecx
  36     mov     ecx, Remainder
  37     jecxz   RemainderNull                      // abandon remainder if Remainder == NULL
  38     mov     [ecx], edx
  39 RemainderNull:
  40     pop     edx
  41   }
  42 }
  43