Macro rank_lessthan 

macro_rules! rank_lessthan {
    ($name:ident, $feature:literal, $lanes:literal,
         $load:ident, $store:ident, $set:ident, $gather:ident,
         $add:ident, $sub:ident, $and:ident, $andnot:ident, $or:ident,
         $left:ident, $right:ident, $gt:ident, $popcount:ident) => { ... };
}