return "DNSRoundRobin"
	case Passthrough:
		return "Passthrough"
	default:
		return fmt.Sprintf("%d", int(resolution))
	}
}

const (
	// LocalityLabel indicates the region/zone/subzone of an instance. It is used to override the native
	// registry's value.
	//
	// Note: because k8s labels does not support `/`, so we use `.` instead in k8s.
	LocalityLabel = pm.LocalityLabel
)

const (

			},
			wantAZ: map[*corev1.Pod]string{
				pod1: "/zone1/",
				pod2: "/zone2/",
			},
		},
		{
			name: "should return correct az if node has only subzone label",
			pods: []*corev1.Pod{pod1, pod2},
			nodes: []*corev1.Node{
				generateNode("node1", map[string]string{label.TopologySubzone.Name: "subzone1"}),

func (u uint128) or(m uint128) uint128 {
	return uint128{u.hi | m.hi, u.lo | m.lo}
}

// not returns the bitwise NOT of u.
func (u uint128) not() uint128 {
	return uint128{^u.hi, ^u.lo}
}

// subOne returns u - 1.
func (u uint128) subOne() uint128 {
	lo, borrow := bits.Sub64(u.lo, 1, 0)
	return uint128{u.hi - borrow, lo}
}

// addOne returns u + 1.
func (u uint128) addOne() uint128 {
	lo, carry := bits.Add64(u.lo, 1, 0)

		{uint128{1, 1}, sub1, uint128{1, 0}},
	}
	for _, tt := range tests {
		var got uint128
		switch tt.op {
		case add1:
			got = tt.in.addOne()
		case sub1:
			got = tt.in.subOne()
		default:
			panic("bogus op")
		}
		if got != tt.want {
			t.Errorf("%v add %d = %v; want %v", tt.in, tt.op, got, tt.want)
		}
	}
}

func TestBitsSetFrom(t *testing.T) {
	tests := []struct {

		"appendDecimal",
		"appendHex",
		"uint128.addOne",
		"uint128.and",
		"uint128.bitsClearedFrom",
		"uint128.bitsSetFrom",
		"uint128.isZero",
		"uint128.not",
		"uint128.or",
		"uint128.subOne",
		"uint128.xor",
	}
	switch runtime.GOARCH {
	case "amd64", "arm64":
		// These don't inline on 32-bit.
		wantInlinable = append(wantInlinable,
			"Addr.AsSlice",
			"Addr.Next",
			"Addr.Prev",
		)

func (ip Addr) Prev() Addr {
	if ip.Is4() {
		if uint32(ip.addr.lo) == 0 {
			return Addr{}
		}
	} else if ip.addr.isZero() {
		return Addr{}
	}
	ip.addr = ip.addr.subOne()
	return ip
}

// String returns the string form of the IP address ip.
// It returns one of 5 forms:
//
//   - "invalid IP", if ip is the zero [Addr]
//   - IPv4 dotted decimal ("192.0.2.1")