mm_b1_format
struct mm_b1_format mm_b1_format;
if ((long)regs->regs[reg16to32map[insn.mm_b1_format.rs]] == 0)
(insn.mm_b1_format.simmediate << 1);
if ((long)regs->regs[reg16to32map[insn.mm_b1_format.rs]] != 0)
(insn.mm_b1_format.simmediate << 1);