emulate_ldd
ret = emulate_ldd(regs, R3(regs->iir), 0);
ret = emulate_ldd(regs, R3(regs->iir), 1);
ret = emulate_ldd(regs,R2(regs->iir),1);
ret = emulate_ldd(regs, R2(regs->iir),0);