MdePkg/Library/BaseLib/GetPowerOfTwo32.c


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/** @file
  Math worker functions.

  Copyright (c) 2006 - 2008, 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 32-bit value. Equivalent to
  1 << log2(x).

  This function computes the value of the highest bit set in the 32-bit value
  specified by Operand. If Operand is zero, then zero is returned.

  @param  Operand The 32-bit operand to evaluate.

  @return 1 << HighBitSet32(Operand)
  @retval 0 Operand is zero.

**/
UINT32
EFIAPI
GetPowerOfTwo32 (
  IN      UINT32  Operand
  )
{
  if (0 == Operand) {
    return 0;
  }

  return 1ul << HighBitSet32 (Operand);
}