func Loong64RegisterExtension(a *obj.Addr, ext string, reg, num int16, isAmount, isIndex bool) error {
	var ok bool
	var arng_type int16
	var simd_type int16

	switch {
	case reg >= loong64.REG_V0 && reg <= loong64.REG_V31:
		simd_type = loong64.LSX
	case reg >= loong64.REG_X0 && reg <= loong64.REG_X31:
		simd_type = loong64.LASX
	default:

		}
	case "A":
		if 0 <= n && n <= 8 {
			return ppc64.REG_A0 + n, true
		}
	case "VS":
		if 0 <= n && n <= 63 {
			return ppc64.REG_VS0 + n, true
		}
	case "V":
		if 0 <= n && n <= 31 {
			return ppc64.REG_V0 + n, true
		}
	case "F":
		if 0 <= n && n <= 31 {
			return ppc64.REG_F0 + n, true
		}
	case "R":
		if 0 <= n && n <= 31 {
			return ppc64.REG_R0 + n, true
		}
	case "SPR":
		if 0 <= n && n <= 1024 {

		}
	case "F":
		if 0 <= n && n <= 15 {
			return s390x.REG_F0 + n, true
		}
	case "R":
		if 0 <= n && n <= 15 {
			return s390x.REG_R0 + n, true
		}
	case "V":
		if 0 <= n && n <= 31 {
			return s390x.REG_V0 + n, true
		}
	}
	return 0, false