return c
	}
	r, g, b, a := c.RGBA()
	if a == 0xffff {
		return NRGBA64{uint16(r), uint16(g), uint16(b), 0xffff}
	}
	if a == 0 {
		return NRGBA64{0, 0, 0, 0}
	}
	// Since Color.RGBA returns an alpha-premultiplied color, we should have r <= a && g <= a && b <= a.
	r = (r * 0xffff) / a
	g = (g * 0xffff) / a
	b = (b * 0xffff) / a
	return NRGBA64{uint16(r), uint16(g), uint16(b), uint16(a)}
}

	SIGSYS    = C.SIGSYS

	FPE_INTDIV = C.FPE_INTDIV & 0xFFFF
	FPE_INTOVF = C.FPE_INTOVF & 0xFFFF
	FPE_FLTDIV = C.FPE_FLTDIV & 0xFFFF
	FPE_FLTOVF = C.FPE_FLTOVF & 0xFFFF
	FPE_FLTUND = C.FPE_FLTUND & 0xFFFF
	FPE_FLTRES = C.FPE_FLTRES & 0xFFFF
	FPE_FLTINV = C.FPE_FLTINV & 0xFFFF
	FPE_FLTSUB = C.FPE_FLTSUB & 0xFFFF

	BUS_ADRALN = C.BUS_ADRALN & 0xFFFF
	BUS_ADRERR = C.BUS_ADRERR & 0xFFFF
	BUS_OBJERR = C.BUS_OBJERR & 0xFFFF

	// returns values in the range [0, 0xffff] instead of [0, 0xff].

	w := 0xffff - uint32(c.K)*0x101
	r := (0xffff - uint32(c.C)*0x101) * w / 0xffff
	g := (0xffff - uint32(c.M)*0x101) * w / 0xffff
	b := (0xffff - uint32(c.Y)*0x101) * w / 0xffff
	return r, g, b, 0xffff
}

// CMYKModel is the [Model] for CMYK colors.
var CMYKModel Model = ModelFunc(cmykModel)

func cmykModel(c Color) Color {
	if _, ok := c.(CMYK); ok {

}

var encodeTests = []encodeTest{
	{[]rune{1, 2, 3, 4}, []uint16{1, 2, 3, 4}},
	{[]rune{0xffff, 0x10000, 0x10001, 0x12345, 0x10ffff},
		[]uint16{0xffff, 0xd800, 0xdc00, 0xd800, 0xdc01, 0xd808, 0xdf45, 0xdbff, 0xdfff}},
	{[]rune{'a', 'b', 0xd7ff, 0xd800, 0xdfff, 0xe000, 0x110000, -1},
		[]uint16{'a', 'b', 0xd7ff, 0xfffd, 0xfffd, 0xe000, 0xfffd, 0xfffd}},
}

func TestEncode(t *testing.T) {
	for _, tt := range encodeTests {

    val flags = buf.readShort().toInt() and 0xffff
    require(flags shr 15 != 0) { "not a response" }

    val responseCode = flags and 0xf

    if (responseCode == NXDOMAIN) {
      throw UnknownHostException("$hostname: NXDOMAIN")
    } else if (responseCode == SERVFAIL) {
      throw UnknownHostException("$hostname: SERVFAIL")
    }

    val questionCount = buf.readShort().toInt() and 0xffff

package unix

// Major returns the major component of a Linux device number.
func Major(dev uint64) uint32 {
	return uint32((dev >> 16) & 0xffff)
}

// Minor returns the minor component of a Linux device number.
func Minor(dev uint64) uint32 {
	return uint32(dev & 0xffff)
}

// Mkdev returns a Linux device number generated from the given major and minor
// components.
func Mkdev(major, minor uint32) uint64 {

big_loop:
	MOVOU	(SI), X0
	MOVOU	(DI), X1
	PCMPEQB X0, X1
	PMOVMSKB X1, AX
	XORQ	$0xffff, AX
	JNE	diff16

	MOVOU	16(SI), X0
	MOVOU	16(DI), X1
	PCMPEQB X0, X1
	PMOVMSKB X1, AX
	XORQ	$0xffff, AX
	JNE	diff32

	MOVOU	32(SI), X0
	MOVOU	32(DI), X1
	PCMPEQB X0, X1
	PMOVMSKB X1, AX
	XORQ	$0xffff, AX
	JNE	diff48

	MOVOU	48(SI), X0
	MOVOU	48(DI), X1
	PCMPEQB X0, X1

}

func mov_movn_32_movewide_cond(instr uint32) bool {
	return !(is_zero((instr>>5)&0xffff) && (instr>>21)&0x3 != 0x0) && !is_ones_n16((instr>>5)&0xffff)
}

func mov_movn_64_movewide_cond(instr uint32) bool {
	return !(is_zero((instr>>5)&0xffff) && (instr>>21)&0x3 != 0x0)
}

func mov_add_32_addsub_imm_cond(instr uint32) bool {
	return instr&0x1f == 0x1f || (instr>>5)&0x1f == 0x1f
}

		println("bad f16", got)
	}
	if got := f8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1); got != 0xff {
		println("bad f8", got)
	}
	if got := g32(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff); got != -1 {
		println("bad g32", got)
	}
	if got := g16(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffff); got != -1 {
		println("bad g16", got)
	}

	unlock(&mtx)
	return 0
}

const disarmed = 0xFFFF

func netpollarm(pd *pollDesc, mode int) {
	lock(&mtx)

	var s subscription

	s.userdata = userdata(uintptr(unsafe.Pointer(pd)))

	fdReadwrite := s.u.subscriptionFdReadwrite()
	fdReadwrite.fd = int32(pd.fd)

	ridx := int(pd.user >> 16)
	widx := int(pd.user & 0xFFFF)