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 //
  18 // Include common header file for this module.
  19 //
  20
  21
  22 #include "../BaseLibInternals.h"
  23
  24 /**
  25   Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
  26   generates a  64-bit signed result and a optional 64-bit signed remainder.
  27
  28   This function divides the 64-bit unsigned value Dividend by the 64-bit
  29   unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
  30   is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
  31   This function returns the 64-bit unsigned quotient.
  32
  33   @param  Dividend  A 64-bit signed value.
  34   @param  Divisor   A 64-bit signed value.
  35   @param  Remainder A pointer to a 64-bit signed value. This parameter is
  36                     optional and may be NULL.
  37
  38   @return Dividend / Divisor
  39
  40 **/
  41 INT64
  42 InternalMathDivRemS64x64 (
  43   IN      INT64                     Dividend,
  44   IN      INT64                     Divisor,
  45   OUT     INT64                     *Remainder  OPTIONAL
  46   )
  47 {
  48   INT64                             Quot;
  49
  50   Quot = InternalMathDivRemU64x64 (
  51            Dividend >= 0 ? Dividend : -Dividend,
  52            Divisor >= 0 ? Divisor : -Divisor,
  53            (UINT64 *) Remainder
  54            );
  55   if (Remainder != NULL && Dividend < 0) {
  56     *Remainder = -*Remainder;
  57   }
  58   return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
  59 }