IF_RRS
INSTR(0xe4, "cgrb", IF_RRS, F_Z),
INSTR(0xe5, "clgrb", IF_RRS, F_Z),
INSTR(0xf6, "crb", IF_RRS, F_Z),
INSTR(0xf7, "clrb", IF_RRS, F_Z),
[IF_RRS] = fmt_rrs,