MOVD	(R3)(R7.SXTX<<3), R8            // 68f867f8
	MOVWU	(R5)(R4.UXTW), R10              // aa4864b8
	MOVBU	(R3)(R9.UXTW), R8               // 68486938
	MOVBU	(R5)(R8), R10                   // aa686838
	MOVHU	(R2)(R7.SXTW<<1), R11           // 4bd86778
	MOVHU	(R1)(R2<<1), R5                 // 25786278
	MOVB	(R9)(R3.UXTW), R6               // 2649a338
	MOVB	(R10)(R6), R15                  // 4f69a638

			}
			a.Reg = arm64.REG_UXTB + Rnum
		case "UXTH":
			if a.Type == obj.TYPE_MEM {
				return errors.New("invalid shift for the register offset addressing mode")
			}
			a.Reg = arm64.REG_UXTH + Rnum
		case "UXTW":
			// effective address of memory is a base register value and an offset register value.
			if a.Type == obj.TYPE_MEM {
				a.Index = arm64.REG_UXTW + Rnum
			} else {
				a.Reg = arm64.REG_UXTW + Rnum
			}

	MOVD.P	R3, 344(R2)                                      // ERROR "offset out of range [-256,255]"
	MOVD	(R3)(R7.SXTX<<2), R8                             // ERROR "invalid index shift amount"
	MOVWU	(R5)(R4.UXTW<<3), R10                            // ERROR "invalid index shift amount"
	MOVWU	(R5)(R4<<1), R10                                 // ERROR "invalid index shift amount"

	num := int16(0)
	isAmount := true // Amount is zero by default
	ext := ""
	if p.peek() == lex.LSH {
		// (Rn)(Rm<<2), the shifted offset register.
		ext = "LSL"
	} else {
		// (Rn)(Rm.UXTW<1), the extended offset register.
		// Rm.UXTW<<3, the extended register.
		p.get('.')
		tok := p.next()
		ext = tok.String()
	}
	if p.peek() == lex.LSH {
		// parses left shift amount applied after extension: <<Amount