Function avr_libc::isinf

pub unsafe extern "C" fn isinf(__x: f64) -> i16

The function isinf() returns 1 if the argument \a __x is positive infinity, -1 if \a __x is negative infinity, and 0 otherwise.

\note The GCC 4.3 can replace this function with inline code that returns the 1 value for both infinities (gcc bug #35509).