Macro horner_fma

macro_rules! horner_fma {
    ($x:expr; [$($coeffs:expr),+ $(,)?]) => { ... };
    ($x:expr; $a:expr $(,)?) => { ... };
    ($x:expr; $a:expr, $($rest:expr),+ $(,)?) => { ... };
    (let $x:expr; $($t:tt)*) => { ... };
}

Evaluate a polynomial with Horner’s method.

Same as horner!, but uses “fused multiply-add” instructions.

The coefficients and the point of evaluation must be of a type which implements num_traits::MulAdd.