Function log2

samples/common/half.h:3150–3153

Binary logorithm. \param arg function argument \return logarithm of \a arg to base 2 template typename enable ::type log2(T arg) { return functions::log2(arg); }

/// \return logarithm of \a arg to base 2
//		template<typename T> typename enable<expr,T>::type log2(T arg) { return functions::log2(arg); }
inline expr log2(half arg)
{
    return functions::log2(arg);
}
inline expr log2(expr arg)
{
    return functions::log2(arg);