IF_RIb
[IF_RIb] = fmt_ri_b,
INSTR(0x5, "bras", IF_RIb, F_390 | F_Z),
INSTR(0x6, "brct", IF_RIb, F_390 | F_Z),
INSTR(0x7, "brctg", IF_RIb, F_Z),