8. Move an optionally-shifted 16-bit immediate value to a register.

The instructions are MOVK(W), MOVZ(W) and MOVN(W), the assembly syntax is "op $(uimm16<<shift), <Rd>". The <uimm16>
is the 16-bit unsigned immediate, in the range 0 to 65535; For the 32-bit variant, the <shift> is 0 or 16, for the
64-bit variant, the <shift> is 0, 16, 32 or 48.

			rt = REGZERO
		}
		if r == obj.REG_NONE {
			r = rt
		}
		o1 |= (uint32(rf&31) << 16) | (uint32(r&31) << 5) | uint32(rt&31)

	case 2: /* add/sub $(uimm12|uimm24)[,R],R; cmp $(uimm12|uimm24),R */
		if p.To.Reg == REG_RSP && isADDSop(p.As) {
			c.ctxt.Diag("illegal destination register: %v\n", p)
		}
		o1 = c.opirr(p, p.As)

		rt, r := p.To.Reg, p.Reg

//sys	CloseServiceHandle(handle Handle) (err error) = advapi32.CloseServiceHandle

	Lastchange  Timeval
}

type IfaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	_       uint16
	Metric  int32
}

type IfmaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	_       uint16
}

type IfAnnounceMsghdr struct {
	Msglen  uint16

}

type IfaMsghdr struct {
	Msglen    uint16
	Version   uint8
	Type      uint8
	Index     uint16
	Flags     int32
	Addrs     int32
	Addrflags int32
	Metric    int32
}

type IfmaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Index   uint16
	Flags   int32
	Addrs   int32
}

type IfAnnounceMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8

type stackt struct {
	ss_sp    *byte
	ss_flags int32
	ss_size  uintptr
}

type sigcontext struct {
	gs            uint16
	__gsh         uint16
	fs            uint16
	__fsh         uint16
	es            uint16
	__esh         uint16
	ds            uint16
	__dsh         uint16
	edi           uint32
	esi           uint32
	ebp           uint32
	esp           uint32
	ebx           uint32

}

type IfaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Hdrlen  uint16
	Index   uint16
	Tableid uint16
	Pad1    uint8
	Pad2    uint8
	Addrs   int32
	Flags   int32
	Metric  int32
}

type IfAnnounceMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Hdrlen  uint16
	Index   uint16
	What    uint16
	Name    [16]int8
}

//sys	regEnumValue(key syscall.Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegEnumValueW
//sys	regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) = advapi32.RegDeleteValueW
//sys   regLoadMUIString(key syscall.Handle, name *uint16, buf *uint16, buflen uint32, buflenCopied *uint32, flags uint32, dir *uint16) (regerrno error) = advapi32.RegLoadMUIStringW

)

type usigset struct {
	__val [16]uint64
}

type fpxreg struct {
	significand [4]uint16
	exponent    uint16
	padding     [3]uint16
}

type xmmreg struct {
	element [4]uint32
}

type fpstate struct {
	cwd       uint16
	swd       uint16
	ftw       uint16
	fop       uint16
	rip       uint64
	rdp       uint64
	mxcsr     uint32
	mxcr_mask uint32
	_st       [8]fpxreg

	Lastchange  Timeval
}

type IfaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	_       uint16
	Metric  int32
}

type IfmaMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Addrs   int32
	Flags   int32
	Index   uint16
	_       uint16
}

type IfAnnounceMsghdr struct {
	Msglen  uint16