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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 HT |
4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
5 | This program and the accompanying materials\r | |
e1f414b6 | 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 | |
e4a34497 | 8 | http://opensource.org/licenses/bsd-license.php.\r |
e1f414b6 | 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 | |
1efcc4ae | 15 | \r |
f734a10a | 16 | \r |
e1f414b6 | 17 | \r |
42eedea9 | 18 | /**\r |
19 | Multiples a 64-bit unsigned integer by a 32-bit unsigned integer\r | |
20 | and generates a 64-bit unsigned result.\r | |
21 | \r | |
22 | This function multiples the 64-bit unsigned value Multiplicand by the 32-bit\r | |
23 | unsigned value Multiplier and generates a 64-bit unsigned result. This 64-\r | |
24 | bit unsigned result is returned.\r | |
25 | \r | |
26 | @param Multiplicand A 64-bit unsigned value.\r | |
27 | @param Multiplier A 32-bit unsigned value.\r | |
28 | \r | |
29 | @return Multiplicand * Multiplier\r | |
30 | \r | |
31 | **/\r | |
e1f414b6 | 32 | UINT64\r |
33 | EFIAPI\r | |
34 | InternalMathMultU64x32 (\r | |
35 | IN UINT64 Multiplicand,\r | |
36 | IN UINT32 Multiplier\r | |
37 | )\r | |
38 | {\r | |
39 | _asm {\r | |
40 | mov ecx, Multiplier\r | |
41 | mov eax, ecx\r | |
42 | imul ecx, dword ptr [Multiplicand + 4] // overflow not detectable\r | |
43 | mul dword ptr [Multiplicand + 0]\r | |
44 | add edx, ecx\r | |
45 | }\r | |
46 | }\r | |
47 | \r |