a.Reg += ((arng_type & loong64.EXT_TYPE_MASK) << loong64.EXT_TYPE_SHIFT)
		a.Reg += ((simd_type & loong64.EXT_SIMDTYPE_MASK) << loong64.EXT_SIMDTYPE_SHIFT)
	}

	return nil
}

func loong64RegisterNumber(name string, n int16) (int16, bool) {
	switch name {
	case "F":
		if 0 <= n && n <= 31 {
			return loong64.REG_F0 + n, true
		}
	case "FCSR":
		if 0 <= n && n <= 31 {

	instructions["JAL"] = loong64.AJAL

	return &Arch{
		LinkArch:       linkArch,
		Instructions:   instructions,
		Register:       register,
		RegisterPrefix: registerPrefix,
		RegisterNumber: loong64RegisterNumber,
		IsJump:         jumpLoong64,
	}
}

func archRISCV64(shared bool) *Arch {
	register := make(map[string]int16)

	// Standard register names.
	for i := riscv.REG_X0; i <= riscv.REG_X31; i++ {