EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ia32/DivS64x64Remainder.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation
   4 All rights reserved. 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
  13 Module Name:
  14
  15   DivS64x64Remainder.c
  16
  17 Abstract:
  18
  19   Integer division worker functions for Ia32.
  20
  21 --*/
  22
  23 #include "..\BaseLibInternal.h"
  24
  25 /**
  26   Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
  27   generates a  64-bit signed result and a optional 64-bit signed remainder.
  28
  29   This function divides the 64-bit unsigned value Dividend by the 64-bit
  30   unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
  31   is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
  32   This function returns the 64-bit unsigned quotient.
  33
  34   @param  Dividend  A 64-bit signed value.
  35   @param  Divisor   A 64-bit signed value.
  36   @param  Remainder A pointer to a 64-bit signed value. This parameter is
  37                     optional and may be NULL.
  38
  39   @return Dividend / Divisor
  40
  41 **/
  42 INT64
  43 InternalMathDivRemS64x64 (
  44   IN      INT64                     Dividend,
  45   IN      INT64                     Divisor,
  46   OUT     INT64                     *Remainder  OPTIONAL
  47   )
  48 {
  49   INT64                             Quot;
  50
  51   Quot = InternalMathDivRemU64x64 (
  52            Dividend >= 0 ? Dividend : -Dividend,
  53            Divisor >= 0 ? Divisor : -Divisor,
  54            (UINT64 *) Remainder
  55            );
  56   if (Remainder != NULL && Dividend < 0) {
  57     *Remainder = -*Remainder;
  58   }
  59   return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
  60 }