| /** @file | |
| Math worker functions. | |
| Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include "BaseLibInternals.h" | |
| /** | |
| Returns the value of the highest bit set in a 64-bit value. Equivalent to | |
| 1 << log2(x). | |
| This function computes the value of the highest bit set in the 64-bit value | |
| specified by Operand. If Operand is zero, then zero is returned. | |
| @param Operand The 64-bit operand to evaluate. | |
| @return 1 << HighBitSet64(Operand) | |
| @retval 0 Operand is zero. | |
| **/ | |
| UINT64 | |
| EFIAPI | |
| GetPowerOfTwo64 ( | |
| IN UINT64 Operand | |
| ) | |
| { | |
| if (Operand == 0) { | |
| return 0; | |
| } | |
| return LShiftU64 (1, (UINTN)HighBitSet64 (Operand)); | |
| } |