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 **/
34 INT64
35 EFIAPI
InternalMathDivRemS64x64(IN INT64 Dividend,IN INT64 Divisor,OUT INT64 * Remainder OPTIONAL)36 InternalMathDivRemS64x64 (
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