Macro def_kernel_bb_pf1 

macro_rules! def_kernel_bb_pf1 {
    (
        $t_ap:ty, $t_bp:ty, $t_c:ty, $t_s:ty,
        $no_partial:tt,
        $RS:tt,
        $MR:tt, $NR:tt, $pf1_0:tt, $pf_step:tt
    ) => { ... };
}