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 UINT64
  16 EFIAPI
  17 InternalMathDivRemU64x32 (
  18   IN      UINT64                    Dividend,
  19   IN      UINT32                    Divisor,
  20   OUT     UINT32                    *Remainder
  21   )
  22 {
  23   _asm {
  24     mov     ecx, Divisor
  25     mov     eax, dword ptr [Dividend + 4]
  26     xor     edx, edx
  27     div     ecx
  28     push    eax
  29     mov     eax, dword ptr [Dividend + 0]
  30     div     ecx
  31     mov     ecx, Remainder
  32     jecxz   RemainderNull                      // abandon remainder if Remainder == NULL
  33     mov     [ecx], edx
  34 RemainderNull:
  35     pop     edx
  36   }
  37 }
  38