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// $Id$ -*-c++-*-
//***************************************************************************
// File:
// MathExtras.h
//
// Purpose:
//
// History:
// 8/25/01 - Vikram Adve - Created
//**************************************************************************/
#ifndef LLVM_SUPPORT_MATH_EXTRAS_H
#define LLVM_SUPPORT_MATH_EXTRAS_H
#include <Support/DataTypes.h>
inline unsigned
log2(uint64_t C)
{
unsigned getPow;
for (getPow = 0; C > 1; getPow++)
C = C >> 1;
return getPow;
}
inline bool
IsPowerOf2(int64_t C, unsigned& getPow)
{
if (C < 0)
C = -C;
bool isPowerOf2 = C > 0 && (C == (C & ~(C - 1)));
if (isPowerOf2)
getPow = log2(C);
return isPowerOf2;
}
#endif /*LLVM_SUPPORT_MATH_EXTRAS_H*/
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