Function _gr_poly_evaluate_vec_fast_precomp 

pub unsafe extern "C" fn _gr_poly_evaluate_vec_fast_precomp(
    vs: gr_ptr,
    poly: gr_srcptr,
    plen: slong,
    tree: *const gr_ptr,
    len: slong,
    ctx: *mut gr_ctx_struct,
) -> c_int