1/** @file
2  Integer division worker functions for Ia32.
3
4  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
5  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**/
14
15#include "BaseLibInternals.h"
16
17/**
18  Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and
19  generates a  64-bit signed result and a optional 64-bit signed remainder.
20
21  This function divides the 64-bit signed value Dividend by the 64-bit
22  signed value Divisor and generates a 64-bit signed quotient. If Remainder
23  is not NULL, then the 64-bit signed remainder is returned in Remainder.
24  This function returns the 64-bit signed quotient.
25
26  @param  Dividend  A 64-bit signed value.
27  @param  Divisor   A 64-bit signed value.
28  @param  Remainder A pointer to a 64-bit signed value. This parameter is
29                    optional and may be NULL.
30
31  @return Dividend / Divisor
32
33**/
34INT64
35EFIAPI
36InternalMathDivRemS64x64 (
37  IN      INT64                     Dividend,
38  IN      INT64                     Divisor,
39  OUT     INT64                     *Remainder  OPTIONAL
40  )
41{
42  INT64                             Quot;
43
44  Quot = InternalMathDivRemU64x64 (
45           (UINT64) (Dividend >= 0 ? Dividend : -Dividend),
46           (UINT64) (Divisor >= 0 ? Divisor : -Divisor),
47           (UINT64 *) Remainder
48           );
49  if (Remainder != NULL && Dividend < 0) {
50    *Remainder = -*Remainder;
51  }
52  return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;
53}
54