emulate_ldw
ret = emulate_ldw(regs, R3(regs->iir), 0);
ret = emulate_ldw(regs, FR3(regs->iir), 1);
ret = emulate_ldw(regs, R2(regs->iir), 1);
ret = emulate_ldw(regs, R2(regs->iir), 0);
ret = emulate_ldw(regs, R2(regs->iir),0);