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e1f414b6 | 1 | /** @file\r |
2 | Calculate the product of a 64-bit integer and a 32-bit integer\r | |
3 | \r | |
bb817c56 | 4 | Copyright (c) 2006 - 2008, 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 |
13 | Multiples a 64-bit unsigned integer by a 32-bit unsigned integer\r | |
14 | and generates a 64-bit unsigned result.\r | |
15 | \r | |
16 | This function multiples the 64-bit unsigned value Multiplicand by the 32-bit\r | |
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 32-bit unsigned value.\r | |
22 | \r | |
23 | @return Multiplicand * Multiplier\r | |
24 | \r | |
25 | **/\r | |
e1f414b6 | 26 | UINT64\r |
27 | EFIAPI\r | |
28 | InternalMathMultU64x32 (\r | |
29 | IN UINT64 Multiplicand,\r | |
30 | IN UINT32 Multiplier\r | |
31 | )\r | |
32 | {\r | |
33 | _asm {\r | |
34 | mov ecx, Multiplier\r | |
35 | mov eax, ecx\r | |
36 | imul ecx, dword ptr [Multiplicand + 4] // overflow not detectable\r | |
37 | mul dword ptr [Multiplicand + 0]\r | |
38 | add edx, ecx\r | |
39 | }\r | |
40 | }\r | |
41 | \r |