Function fpclassify

include/half_float/half.hpp:4357–4364

Classify floating-point value. See also:** Documentation for [std::fpclassify](https://en.cppreference.com/w/cpp/numeric/math/fpclassify). \param arg number to classify \retval FP_ZERO for positive and negative zero \retval FP_SUBNORMAL for subnormal numbers \retval FP_INFINITY for positive and negative infinity \retval FP_NAN for NaNs \retval FP_NORMAL for all other (normal) values

	/// \retval FP_NAN for NaNs
	/// \retval FP_NORMAL for all other (normal) values
	inline HALF_CONSTEXPR int fpclassify(half arg)
	{
		return	!(arg.data_&0x7FFF) ? FP_ZERO :
				((arg.data_&0x7FFF)<0x400) ? FP_SUBNORMAL :
				((arg.data_&0x7FFF)<0x7C00) ? FP_NORMAL :
				((arg.data_&0x7FFF)==0x7C00) ? FP_INFINITE :
				FP_NAN;
	}

	/// Check if finite number.
	/// **See also:** Documentation for [std::isfinite](https://en.cppreference.com/w/cpp/numeric/math/isfinite).