MdePkg/Library/BaseLib/Ia32/DivU64x32Remainder.c

   1 /** @file
   2   Set error flag for all division functions
   3
   4   Copyright (c) 2006, 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 #if _MSC_EXTENSIONS
  16
  17 UINT64
  18 EFIAPI
  19 InternalMathDivRemU64x32 (
  20   IN      UINT64                    Dividend,
  21   IN      UINT32                    Divisor,
  22   OUT     UINT32                    *Remainder
  23   )
  24 {
  25   _asm {
  26     mov     ecx, Divisor
  27     mov     eax, dword ptr [Dividend + 4]
  28     xor     edx, edx
  29     div     ecx
  30     push    eax
  31     mov     eax, dword ptr [Dividend + 0]
  32     div     ecx
  33     mov     ecx, Remainder
  34     jecxz   RemainderNull                      // abandon remainder if Remainder == NULL
  35     mov     [ecx], edx
  36 RemainderNull:
  37     pop     edx
  38   }
  39 }
  40
  41 #endif