Return the fine-grained classification of a floating-point number.
Return the fine-grained classification for the specified floating point number. For positive numbers and quiet NaNs, the classifyFine function returns the same integer value as classify. For negative numbers, classifyFine returns an integer value equal to value returned by classify bit-wise OR'ed with k_NEGATIVE. For signaling NaNs, classifyFine returns k_SNAN, which has the integer value of k_NAN | k_SIGNALING.