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

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

			// the CR bit.
			prog.Reg = a[1].Reg
			if a[1].Type != obj.TYPE_REG {
				// The CR bit is represented as a constant 0-31. Convert it to a Reg.
				c := p.getConstant(prog, op, &a[1])
				reg, success := ppc64.ConstantToCRbit(c)
				if !success {
					p.errorf("invalid CR bit register number %d", c)
				}
				prog.Reg = reg
			}
			break
		}

	// Expect (SB), (FP), (PC), or (SP)
	p.get('(')
	reg := p.get(scanner.Ident).String()
	p.get(')')
	p.setPseudoRegister(a, reg, isStatic, prefix)
}

// setPseudoRegister sets the NAME field of addr for a pseudo-register reference such as (SB).
func (p *Parser) setPseudoRegister(addr *obj.Addr, reg string, isStatic bool, prefix rune) {
	if addr.Reg != 0 {
		p.errorf("internal error: reg %s already set in pseudo", reg)
	}
	switch reg {

}

// ARM64RegisterShift constructs an ARM64 register with shift operation.
func ARM64RegisterShift(reg, op, count int16) (int64, error) {
	// the base register of shift operations must be general register.
	if reg > arm64.REG_R31 || reg < arm64.REG_R0 {
		return 0, errors.New("invalid register for shift operation")
	}
	return int64(reg&31)<<16 | int64(op)<<22 | int64(uint16(count)), nil
}

  /**
   * Returns the high-level media type, such as "text", "image", "audio", "video", or "application".
   */
  @get:JvmName("type") val type: String,
  /**
   * Returns a specific media subtype, such as "plain" or "png", "mpeg", "mp4" or "xml".
   */
  @get:JvmName("subtype") val subtype: String,
  /** Alternating parameter names with their values, like `["charset", "utf-8"]`. */
  private val parameterNamesAndValues: Array<String>,
) {
  /**

				"audio/l24",
				"audio/l8",
				"audio/lpc",
				"audio/midi",
				"audio/mobile-xmf",
				"audio/mp4",
				"audio/mp4a-latm",
				"audio/mpa",
				"audio/mpa-robust",
				"audio/mpeg",
				"audio/mpeg4-generic",
				"audio/ogg",
				"audio/vorbis",
				"audio/x-oggflac",
				"audio/x-oggpcm",
				"audio/opus",
				"audio/speex",
				"audio/parityfec",
				"audio/pcma",

labels.facet_filetype_rar=RAR Archive
labels.facet_filetype_3gp=3gp Video
labels.facet_filetype_3g2=3g2 Video
labels.facet_filetype_avi=AVI Video
labels.facet_filetype_flv=FLV Video
labels.facet_filetype_mpeg=MPEG Video
labels.facet_filetype_mp4=MP4 Video
labels.facet_filetype_ogv=OGV Video
labels.facet_filetype_qt=QuickTime Video
labels.facet_filetype_m4v=M4V Video
labels.facet_filetype_ogg=OGG Audio

labels.facet_filetype_tar=TAR存檔
labels.facet_filetype_rar=RAR存檔
labels.facet_filetype_3gp=3gp視訊
labels.facet_filetype_3g2=3g2視訊
labels.facet_filetype_avi=AVI視訊
labels.facet_filetype_flv=FLV視訊
labels.facet_filetype_mpeg=MPEG視訊
labels.facet_filetype_mp4=MP4視訊
labels.facet_filetype_ogv=OGV視訊
labels.facet_filetype_qt=QuickTime視訊
labels.facet_filetype_m4v=M4V視訊
labels.facet_filetype_ogg=OGG音訊
labels.facet_filetype_wav=WAV音訊

	for i := arm64.REG_PN0; i <= arm64.REG_PN15; i++ {
		register[obj.Rconv(i)] = int16(i)
	}

	// System registers.
	for i := 0; i < len(arm64.SystemReg); i++ {
		register[arm64.SystemReg[i].Name] = arm64.SystemReg[i].Reg
	}

	register["LR"] = arm64.REGLINK

	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP
	register["PC"] = RPC
	register["SP"] = RSP
	// Avoid unintentionally clobbering g using R28.

	LSR $12, R1, R20                           // 34fc4cd3
	MADDW R13, R23, R3, R10                    // 6a5c0d1b
	MADD R5, R23, R10, R4                      // 445d059b
	MNEGW R0, R9, R21                          // 35fd001b
	MNEG R14, R27, R23                         // 77ff0e9b
	MOVD  R2, R7                               // e70302aa
	MOVW $-24, R20                             // f4028012
	MOVD $-51096, ZR                           // fff29892