/** @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)); | |
} |