MdePkg/Library/BaseLib/Ia32/DivU64x32.nasm

   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.nasm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   Calculate the quotient of a 64-bit integer by a 32-bit integer
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     SECTION .text
  23
  24 ;------------------------------------------------------------------------------
  25 ; UINT64
  26 ; EFIAPI
  27 ; InternalMathDivU64x32 (
  28 ;   IN      UINT64                    Dividend,
  29 ;   IN      UINT32                    Divisor
  30 ;   );
  31 ;------------------------------------------------------------------------------
  32 global ASM_PFX(InternalMathDivU64x32)
  33 ASM_PFX(InternalMathDivU64x32):
  34     mov     eax, [esp + 8]
  35     mov     ecx, [esp + 12]
  36     xor     edx, edx
  37     div     ecx
  38     push    eax                     ; save quotient on stack
  39     mov     eax, [esp + 8]
  40     div     ecx
  41     pop     edx                     ; restore high-order dword of the quotient
  42     ret
  43