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
			}
		case "UXTX":

	if err != nil {
		p.errorf("bad size for DATA argument: %q", szop)
	}
	op = op[:n-2]
	nameAddr := p.address(op)
	if !p.validSymbol("DATA", &nameAddr, true) {
		return
	}
	name := symbolName(&nameAddr)

	// Operand 1 is an immediate constant or address.
	valueAddr := p.address(operands[1])
	switch valueAddr.Type {
	case obj.TYPE_CONST, obj.TYPE_FCONST, obj.TYPE_SCONST, obj.TYPE_ADDR:
		// OK

	JMP	4(X5)					// 67804200

	// CALL and JMP to symbol are encoded as JAL (using LR or ZERO
	// respectively), with a R_RISCV_JAL relocation. The linker resolves
	// the real address and updates the immediate, using a trampoline in
	// the case where the address is not directly reachable.
	CALL	asmtest(SB)				// ef000000
	JMP	asmtest(SB)				// 6f000000

	// Branch pseudo-instructions
	BEQZ	X5, 2(PC)				// 63840200

pkg syscall (freebsd-386-cgo), type ICMPv6Filter struct
pkg syscall (freebsd-386-cgo), type ICMPv6Filter struct, Filt [8]uint32
pkg syscall (freebsd-386-cgo), type IPMreqn struct
pkg syscall (freebsd-386-cgo), type IPMreqn struct, Address [4]uint8
pkg syscall (freebsd-386-cgo), type IPMreqn struct, Ifindex int32
pkg syscall (freebsd-386-cgo), type IPMreqn struct, Multiaddr [4]uint8
pkg syscall (freebsd-386-cgo), type IPv6MTUInfo struct