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[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / DivS64x64Remainder.c
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e1f414b6 1/** @file\r
2 Integer division worker functions for Ia32.\r
3\r
4 Copyright (c) 2006, Intel Corporation<BR>\r
5 All rights reserved. This program and the accompanying materials\r
6 are licensed and made available under the terms and conditions of the BSD License\r
7 which accompanies this distribution. The full text of the license may be found at\r
8 http://opensource.org/licenses/bsd-license.php\r
9\r
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
13 Module Name: DivS64x64Remainder.c\r
14\r
15**/\r
16\r
17//\r
18// Include common header file for this module.\r
19//\r
f734a10a 20\r
e1f414b6 21\r
22#include "../BaseLibInternals.h"\r
23\r
24/**\r
25 Worker function that Divides a 64-bit signed integer by a 64-bit signed integer and\r
26 generates a 64-bit signed result and a optional 64-bit signed remainder.\r
27\r
28 This function divides the 64-bit unsigned value Dividend by the 64-bit\r
29 unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r
30 is not NULL, then the 64-bit unsigned remainder is returned in Remainder.\r
31 This function returns the 64-bit unsigned quotient.\r
32\r
33 @param Dividend A 64-bit signed value.\r
34 @param Divisor A 64-bit signed value.\r
35 @param Remainder A pointer to a 64-bit signed value. This parameter is\r
36 optional and may be NULL.\r
37\r
38 @return Dividend / Divisor\r
39\r
40**/\r
41INT64\r
42InternalMathDivRemS64x64 (\r
43 IN INT64 Dividend,\r
44 IN INT64 Divisor,\r
45 OUT INT64 *Remainder OPTIONAL\r
46 )\r
47{\r
48 INT64 Quot;\r
49\r
50 Quot = InternalMathDivRemU64x64 (\r
51 Dividend >= 0 ? Dividend : -Dividend,\r
52 Divisor >= 0 ? Divisor : -Divisor,\r
53 (UINT64 *) Remainder\r
54 );\r
55 if (Remainder != NULL && Dividend < 0) {\r
56 *Remainder = -*Remainder;\r
57 }\r
58 return (Dividend ^ Divisor) >= 0 ? Quot : -Quot;\r
59}\r