MdePkg/Library/BaseLib/Ia32/DivS64x64Remainder.c

   1 /** @file
   2   Integer division worker functions for Ia32.
   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   Module Name:  DivS64x64Remainder.c
  14
  15 **/
  16
  17 #include "../BaseLibInternals.h"
  18
  19 /**
  20   Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
  21   generates a  64-bit signed result and a optional 64-bit signed remainder.
  22
  23   This function divides the 64-bit unsigned value Dividend by the 64-bit
  24   unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
  25   is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
  26   This function returns the 64-bit unsigned quotient.
  27
  28   @param  Dividend  A 64-bit signed value.
  29   @param  Divisor   A 64-bit signed value.
  30   @param  Remainder A pointer to a 64-bit signed value. This parameter is
  31                     optional and may be NULL.
  32
  33   @return Dividend / Divisor
  34
  35 **/
  36 INT64
  37 InternalMathDivRemS64x64 (
  38   IN      INT64                     Dividend,
  39   IN      INT64                     Divisor,
  40   OUT     INT64                     *Remainder  OPTIONAL
  41   )
  42 {
  43   INT64                             Quot;
  44
  45   Quot = InternalMathDivRemU64x64 (
  46            Dividend >= 0 ? Dividend : -Dividend,
  47            Divisor >= 0 ? Divisor : -Divisor,
  48            (UINT64 *) Remainder
  49            );
  50   if (Remainder != NULL && Dividend < 0) {
  51     *Remainder = -*Remainder;
  52   }
  53   return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
  54 }