mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-18 15:27:48 +01:00
39 lines
780 B
C
39 lines
780 B
C
/** @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));
|
|
}
|