]>
Commit | Line | Data |
---|---|---|
e1f414b6 | 1 | /** @file\r |
2 | Calculate the product of a 64-bit integer and another 64-bit integer\r | |
3 | \r | |
e4a34497 | 4 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
e1f414b6 | 6 | \r |
7 | **/\r | |
8 | \r | |
1efcc4ae | 9 | \r |
f734a10a | 10 | \r |
e1f414b6 | 11 | \r |
42eedea9 | 12 | /**\r |
e4a34497 | 13 | Multiplies a 64-bit unsigned integer by a 64-bit unsigned integer\r |
42eedea9 | 14 | and generates a 64-bit unsigned result.\r |
15 | \r | |
e4a34497 | 16 | This function multiplies the 64-bit unsigned value Multiplicand by the 64-bit\r |
42eedea9 | 17 | unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r |
18 | bit unsigned result is returned.\r | |
19 | \r | |
20 | @param Multiplicand A 64-bit unsigned value.\r | |
21 | @param Multiplier A 64-bit unsigned value.\r | |
22 | \r | |
23 | @return Multiplicand * Multiplier\r | |
24 | \r | |
25 | **/\r | |
e1f414b6 | 26 | UINT64\r |
27 | EFIAPI\r | |
28 | InternalMathMultU64x64 (\r | |
29 | IN UINT64 Multiplicand,\r | |
30 | IN UINT64 Multiplier\r | |
31 | )\r | |
32 | {\r | |
33 | _asm {\r | |
34 | mov ebx, dword ptr [Multiplicand + 0]\r | |
35 | mov edx, dword ptr [Multiplier + 0]\r | |
36 | mov ecx, ebx\r | |
37 | mov eax, edx\r | |
38 | imul ebx, dword ptr [Multiplier + 4]\r | |
39 | imul edx, dword ptr [Multiplicand + 4]\r | |
40 | add ebx, edx\r | |
41 | mul ecx\r | |
42 | add edx, ebx\r | |
43 | }\r | |
44 | }\r | |
45 | \r |