Macro fasteval::f64_ne

macro_rules! f64_ne {
    ($l:ident, $r:literal) => { ... };
    ($l:ident, $r:ident) => { ... };
    ($l:expr, $r:literal) => { ... };
    ($l:expr, $r:expr) => { ... };
}

Uses EPSILON to determine inequality of two f64s.

This is exactly the same as saying !f64_eq(x,y) but it is slightly more efficient.