MdePkg/Library/BaseLib/Ia32/DivU64x32.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 ; This program and the accompanying materials
   5 ; are licensed and made available under the terms and conditions of the BSD License
   6 ; which accompanies this distribution.  The full text of the license may be found at
   7 ; http://opensource.org/licenses/bsd-license.php.
   8 ;
   9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ; Module Name:
  13 ;
  14 ;   DivU64x32.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   Calculate the quotient of a 64-bit integer by a 32-bit integer
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .386
  23     .model  flat,C
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ; UINT64
  28 ; EFIAPI
  29 ; InternalMathDivU64x32 (
  30 ;   IN      UINT64                    Dividend,
  31 ;   IN      UINT32                    Divisor
  32 ;   );
  33 ;------------------------------------------------------------------------------
  34 InternalMathDivU64x32   PROC
  35     mov     eax, [esp + 8]
  36     mov     ecx, [esp + 12]
  37     xor     edx, edx
  38     div     ecx
  39     push    eax                     ; save quotient on stack
  40     mov     eax, [esp + 8]
  41     div     ecx
  42     pop     edx                     ; restore high-order dword of the quotient
  43     ret
  44 InternalMathDivU64x32   ENDP
  45
  46     END