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1 | /** @file\r | |
2 | Set error flag for all division functions\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
5 | 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 | Divides a 64-bit unsigned integer by a 32-bit unsigned integer and\r | |
17 | generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.\r | |
18 | \r | |
19 | This function divides the 64-bit unsigned value Dividend by the 32-bit\r | |
20 | unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder\r | |
21 | is not NULL, then the 32-bit unsigned remainder is returned in Remainder.\r | |
22 | This function returns the 64-bit unsigned quotient.\r | |
23 | \r | |
24 | @param Dividend A 64-bit unsigned value.\r | |
25 | @param Divisor A 32-bit unsigned value.\r | |
26 | @param Remainder A pointer to a 32-bit unsigned value. This parameter is\r | |
27 | optional and may be NULL.\r | |
28 | \r | |
29 | @return Dividend / Divisor\r | |
30 | \r | |
31 | **/\r | |
32 | UINT64\r | |
33 | EFIAPI\r | |
34 | InternalMathDivRemU64x32 (\r | |
35 | IN UINT64 Dividend,\r | |
36 | IN UINT32 Divisor,\r | |
37 | OUT UINT32 *Remainder\r | |
38 | )\r | |
39 | {\r | |
40 | _asm {\r | |
41 | mov ecx, Divisor\r | |
42 | mov eax, dword ptr [Dividend + 4]\r | |
43 | xor edx, edx\r | |
44 | div ecx\r | |
45 | push eax\r | |
46 | mov eax, dword ptr [Dividend + 0]\r | |
47 | div ecx\r | |
48 | mov ecx, Remainder\r | |
49 | jecxz RemainderNull // abandon remainder if Remainder == NULL\r | |
50 | mov [ecx], edx\r | |
51 | RemainderNull:\r | |
52 | pop edx\r | |
53 | }\r | |
54 | }\r | |
55 | \r |