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Functions
HighBitSet32.c File Reference
#include "BaseLibInternals.h"

Go to the source code of this file.

Functions

INTN EFIAPI HighBitSet32 (IN UINT32 Operand)
 

Detailed Description

Math worker functions.

Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file HighBitSet32.c.

Function Documentation

◆ HighBitSet32()

INTN EFIAPI HighBitSet32 ( IN UINT32  Operand)

Returns the bit position of the highest bit set in a 32-bit value. Equivalent to log2(x).

This function computes the bit position of the highest bit set in the 32-bit value specified by Operand. If Operand is zero, then -1 is returned. Otherwise, a value between 0 and 31 is returned.

Parameters
OperandThe 32-bit operand to evaluate.
Return values
0..31Position of the highest bit set in Operand if found.
-1Operand is zero.

Definition at line 27 of file HighBitSet32.c.