EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/DivU64x32Remainder.asm

   1 ; Copyright (c) 2004, Intel Corporation
   2 ; All rights reserved. This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   DivError.asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   Set error flag for all division functions
  17 ;
  18 ;------------------------------------------------------------------------------
  19
  20     .386
  21     .model  flat,C
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ; UINT64
  26 ; EFIAPI
  27 ; InternalMathDivRemU64x32 (
  28 ;   IN      UINT64                    Dividend,
  29 ;   IN      UINT32                    Divisor,
  30 ;   OUT     UINT32                    *Remainder
  31 ;   );
  32 ;------------------------------------------------------------------------------
  33 InternalMathDivRemU64x32    PROC
  34     mov     ecx, [esp + 12]         ; ecx <- divisor
  35     mov     eax, [esp + 8]          ; eax <- dividend[32..63]
  36     xor     edx, edx
  37     div     ecx                     ; eax <- quotient[32..63], edx <- remainder
  38     push    eax
  39     mov     eax, [esp + 8]          ; eax <- dividend[0..31]
  40     div     ecx                     ; eax <- quotient[0..31]
  41     mov     ecx, [esp + 20]         ; ecx <- Remainder
  42     jecxz   @F                      ; abandon remainder if Remainder == NULL
  43     mov     [ecx], edx
  44 @@:
  45     pop     edx                     ; edx <- quotient[32..63]
  46     ret
  47 InternalMathDivRemU64x32    ENDP
  48
  49     END