Function avr_libc::hypot

pub unsafe extern "C" fn hypot(__x: f64, __y: f64) -> f64

The hypot() function returns sqrt(__x*__x + __y*__y). This is the length of the hypotenuse of a right triangle with sides of length \a __x and \a __y, or the distance of the point (\a __x, \a __y) from the origin. Using this function instead of the direct formula is wise, since the error is much smaller. No underflow with small \a __x and \a __y. No overflow if result is in range.