func handle_ImmediateShiftedRegister(x uint32, max uint8, is_w, has_ror bool) Arg {
	var rsa RegExtshiftAmount
	if is_w {
		rsa.reg = W0 + Reg((x>>16)&(1<<5-1))
	} else {
		rsa.reg = X0 + Reg((x>>16)&(1<<5-1))
	}
	switch (x >> 22) & 0x3 {
	case 0:
		rsa.extShift = lsl
	case 1:
		rsa.extShift = lsr
	case 2:
		rsa.extShift = asr
	case 3:
		if has_ror {
			rsa.extShift = ror
		} else {