const NULL 0 end
const false 0 end
const true 1 end

fn div with int int returns int then divmod drop done
fn mod with int int returns int then divmod swap drop done


fn dup2 with any any returns any any any any then over over done
fn drop2 with any any returns void then drop drop done

const sizeof(u64) 8 end
const sizeof(u32) 4 end
const sizeof(u16) 2 end
const sizeof(u8)  1 end