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1 | /** @file\r | |
2 | Math worker functions.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include "BaseLibInternals.h"\r | |
10 | \r | |
11 | /**\r | |
12 | Returns the value of the highest bit set in a 32-bit value. Equivalent to\r | |
13 | 1 << log2(x).\r | |
14 | \r | |
15 | This function computes the value of the highest bit set in the 32-bit value\r | |
16 | specified by Operand. If Operand is zero, then zero is returned.\r | |
17 | \r | |
18 | @param Operand The 32-bit operand to evaluate.\r | |
19 | \r | |
20 | @return 1 << HighBitSet32(Operand)\r | |
21 | @retval 0 Operand is zero.\r | |
22 | \r | |
23 | **/\r | |
24 | UINT32\r | |
25 | EFIAPI\r | |
26 | GetPowerOfTwo32 (\r | |
27 | IN UINT32 Operand\r | |
28 | )\r | |
29 | {\r | |
30 | if (0 == Operand) {\r | |
31 | return 0;\r | |
32 | }\r | |
33 | \r | |
34 | return 1ul << HighBitSet32 (Operand);\r | |
35 | }\r |