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e1f414b6 | 1 | /** @file\r |
2 | Calculate the quotient of a 64-bit integer by a 32-bit integer\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2007, 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 | **/\r | |
14 | \r | |
15 | //\r | |
16 | // Include common header file for this module.\r | |
17 | //\r | |
f734a10a | 18 | \r |
e1f414b6 | 19 | \r |
42eedea9 | 20 | /**\r |
21 | Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r | |
22 | generates a 64-bit unsigned result.\r | |
23 | \r | |
24 | This function divides the 64-bit unsigned value Dividend by the 32-bit\r | |
25 | unsigned value Divisor and generates a 64-bit unsigned quotient. This\r | |
26 | function returns the 64-bit unsigned quotient.\r | |
27 | \r | |
28 | @param Dividend A 64-bit unsigned value.\r | |
29 | @param Divisor A 32-bit unsigned value.\r | |
30 | \r | |
31 | @return Dividend / Divisor\r | |
32 | \r | |
33 | **/\r | |
e1f414b6 | 34 | UINT64\r |
35 | EFIAPI\r | |
36 | InternalMathDivU64x32 (\r | |
37 | IN UINT64 Dividend,\r | |
38 | IN UINT32 Divisor\r | |
39 | )\r | |
40 | {\r | |
41 | _asm {\r | |
42 | mov eax, dword ptr [Dividend + 4]\r | |
43 | mov ecx, Divisor\r | |
44 | xor edx, edx\r | |
45 | div ecx\r | |
46 | push eax ; save quotient on stack\r | |
47 | mov eax, dword ptr [Dividend]\r | |
48 | div ecx\r | |
49 | pop edx ; restore high-order dword of the quotient\r | |
50 | }\r | |
51 | }\r | |
52 | \r |