MOVW	R8, (R2)(R3.UXTW<<2)            // 485823b8
	MOVW	R7, (R3)(R4.SXTW)               // 67c824b8
	MOVB	R4, (R2)(R6.SXTX)               // 44e82638
	MOVB	R8, (R3)(R9.UXTW)               // 68482938
	MOVB	R10, (R5)(R8)                   // aa682838
	MOVB	R10, (R5)(R8*1)                 // aa682838
	MOVH	R11, (R2)(R7.SXTW<<1)           // 4bd82778
	MOVH	R5, (R1)(R2<<1)                 // 25782278

			}
			a.Reg = arm64.REG_SXTB + Rnum
		case "SXTH":
			if a.Type == obj.TYPE_MEM {
				return errors.New("invalid shift for the register offset addressing mode")
			}
			a.Reg = arm64.REG_SXTH + Rnum
		case "SXTW":
			if a.Type == obj.TYPE_MEM {
				a.Index = arm64.REG_SXTW + Rnum
			} else {
				a.Reg = arm64.REG_SXTW + Rnum
			}
		case "SXTX":
			if a.Type == obj.TYPE_MEM {
				a.Index = arm64.REG_SXTX + Rnum

	MOVWU	(R5)(R4.UXTW<<3), R10                            // ERROR "invalid index shift amount"
	MOVWU	(R5)(R4<<1), R10                                 // ERROR "invalid index shift amount"
	MOVB	(R5)(R4.SXTW<<5), R10                            // ERROR "invalid index shift amount"
	MOVH	R5, (R6)(R2<<3)                                  // ERROR "invalid index shift amount"