R16/LOAD  reg_mask-16, RP, dt_flags, d_size
          reg_mask-16, RP, dt_flags, d_size, d_sign-1
          reg_mask-16, RP, dt_flags, d_size, d_sign-1, p_p_inc_dec-3
          reg_mask-16, RP, dt_flags, d_size, d_sign-1, p_p_inc_dec-3, relative-1
          reg_mask-16, RP, dt_flags, d_size, d_sign-1, p_p_inc_dec-3, relative-1, R1 or p_immediate
          reg_mask-16, RP, dt_flags, d_size, d_sign-1, p_p_inc_dec-3, relative-1, R1 or p_immediate, R2 or shift_immediate



