MdePkg/Library/BaseLib/Ia32/DivU64x32.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;   DivU64x32.nasm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;   Calculate the quotient of a 64-bit integer by a 32-bit integer
  13 ;
  14 ;------------------------------------------------------------------------------
  15
  16     SECTION .text
  17
  18 ;------------------------------------------------------------------------------
  19 ; UINT64
  20 ; EFIAPI
  21 ; InternalMathDivU64x32 (
  22 ;   IN      UINT64                    Dividend,
  23 ;   IN      UINT32                    Divisor
  24 ;   );
  25 ;------------------------------------------------------------------------------
  26 global ASM_PFX(InternalMathDivU64x32)
  27 ASM_PFX(InternalMathDivU64x32):
  28     mov     eax, [esp + 8]
  29     mov     ecx, [esp + 12]
  30     xor     edx, edx
  31     div     ecx
  32     push    eax                     ; save quotient on stack
  33     mov     eax, [esp + 8]
  34     div     ecx
  35     pop     edx                     ; restore high-order dword of the quotient
  36     ret
  37