c/numeric/math/fmax

@1-3@ Returns the larger of two floating point arguments, treating NaNs as missing data (between a NaN and a numeric value, the numeric value is chosen). @4@ Type-generic macro: If any argument has type, is called. Otherwise, if any argument has integer type or has type, is called. Otherwise, is called.

Return value
If successful, returns the larger of two floating point values. The value returned is exact and does not depend on any rounding modes.

Error handling
This function is not subject to any of the error conditions specified in.

If the implementation supports IEEE floating-point arithmetic (IEC 60559),
 * If one of the two arguments is NaN, the value of the other argument is returned.
 * Only if both arguments are NaN is NaN returned.