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e1f414b6 | 1 | /** @file\r |
2 | Math worker functions.\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 | |
e1f414b6 | 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 | |
9aa049d9 | 13 | 1 << log2(x).\r |
e1f414b6 | 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 | |
2f88bd3a | 27 | IN UINT32 Operand\r |
e1f414b6 | 28 | )\r |
29 | {\r | |
38bbd3d9 | 30 | if (0 == Operand) {\r |
e1f414b6 | 31 | return 0;\r |
32 | }\r | |
33 | \r | |
34 | return 1ul << HighBitSet32 (Operand);\r | |
35 | }\r |