R8/LOAD  reg_bank, reg_mask-2x8, RP
         reg_bank, reg_mask-2x8, RP, d_sign-1
         reg_bank, reg_mask-2x8, RP, d_sign-1, d_extend_bits-1
         reg_bank, reg_mask-2x8, RP, d_sign-1, d_extend_bits-1, p_p_inc_dec-3
         reg_bank, reg_mask-2x8, RP, d_sign-1, d_extend_bits-1, p_p_inc_dec-3, relative-1
         reg_bank, reg_mask-2x8, RP, d_sign-1, d_extend_bits-1, p_p_inc_dec-3, relative-1, R2 or p_immediate
         reg_bank, reg_mask-2x8, RP, d_sign-1, d_extend_bits-1, p_p_inc_dec-3, relative-1, R2 or p_immediate, R3 or shift_immediate


