type umtx_time struct {
	_timeout timespec
	_flags   uint32
	_clockid uint32
}

type keventt struct {
	ident  uint64
	filter int16
	flags  uint16
	fflags uint32
	data   int64
	udata  *byte
	ext    [4]uint64
}

type bintime struct {
	sec  int64
	frac uint64
}

type vdsoTimehands struct {
	algo         uint32
	gen          uint32
	scale        uint64
	offset_count uint32

	Mode   uint32 // permissions
	Atime  uint32 // last read time
	Mtime  uint32 // last write time
	Length int64  // file length
	Name   string // last element of path
	Uid    string // owner name
	Gid    string // group name
	Muid   string // last modifier name
}

var nullDir = Dir{
	Type: ^uint16(0),
	Dev:  ^uint32(0),
	Qid: Qid{
		Path: ^uint64(0),
		Vers: ^uint32(0),
		Type: ^uint8(0),
	},
	Mode:   ^uint32(0),

	// the working directory has changed without using os.Chdir.
	n := uint32(pathLength) + 1
	var buf []uint16
	for {
		buf = make([]uint16, n+uint32(len(prefix)))
		n, err = syscall.GetFullPathName(&p[0], n, &buf[len(prefix)], nil)
		if err != nil {
			return path
		}
		if n <= uint32(len(buf)-len(prefix)) {
			buf = buf[:n+uint32(len(prefix))]
			break
		}
	}
	if isUNC {
		// Remove leading \\.

	mc_onstack       uint32
	mc_gs            uint32
	mc_fs            uint32
	mc_es            uint32
	mc_ds            uint32
	mc_edi           uint32
	mc_esi           uint32
	mc_ebp           uint32
	mc_isp           uint32
	mc_ebx           uint32
	mc_edx           uint32
	mc_ecx           uint32
	mc_eax           uint32
	mc_trapno        uint32
	mc_err           uint32
	mc_eip           uint32

	gp_ra      uint64
	gp_sp      uint64
	gp_gp      uint64
	gp_tp      uint64
	gp_t       [7]uint64
	gp_s       [12]uint64
	gp_a       [8]uint64
	gp_sepc    uint64
	gp_sstatus uint64
}

type fpregs struct {
	fp_x     [64]uint64 // actually __uint64_t fp_x[32][2]
	fp_fcsr  uint64
	fp_flags int32
	pad      int32
}

type mcontext struct {
	mc_gpregs gpregs
	mc_fpregs fpregs

	for i := 0; i < n; i += 4 {
		x := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32
		b = b[5:]
		f[i] = fieldElement(decompress(uint16(x>>0&0b11_1111_1111), 10))
		f[i+1] = fieldElement(decompress(uint16(x>>10&0b11_1111_1111), 10))
		f[i+2] = fieldElement(decompress(uint16(x>>20&0b11_1111_1111), 10))
		f[i+3] = fieldElement(decompress(uint16(x>>30&0b11_1111_1111), 10))
	}
	return f
}

	ip               string
	hnsID            string
	healthCheckHnsID string
}

type loadBalancerInfo struct {
	hnsID string
}

type loadBalancerIdentifier struct {
	protocol      uint16
	internalPort  uint16
	externalPort  uint16
	vip           string
	endpointsHash [20]byte
}

type loadBalancerFlags struct {
	isILB           bool
	isDSR           bool
	isVipExternalIP bool
	localRoutedVIP  bool

	gen          uint32
	scale        uint64
	offset_count uint32
	counter_mask uint32
	offset       bintime
	boottime     bintime
	physical     uint32
	res          [7]uint32
}

type vdsoTimekeep struct {
	ver       uint32
	enabled   uint32
	current   uint32
	pad_cgo_0 [4]byte
}

const (
	_VDSO_TK_VER_CURR = 0x1

	vdsoTimehandsSize = 0x58
	vdsoTimekeepSize  = 0x10

		return 1
	}
	return 0
}

func UintGeqZero(a uint8, b uint16, c uint32, d uint64) int {
	// amd64: -`(TESTB|TESTW|TESTL|TESTQ|JCS|JCC)`
	// arm64: -`(CMPW|CMP|BLO|BHS)`
	if a >= 0 || b >= 0 || c >= 0 || d >= 0 {
		return 1
	}
	return 0
}

func UintGtZero(a uint8, b uint16, c uint32, d uint64) int {
	// arm64: `(CBN?ZW)`, `(CBN?Z[^W])`, -`(CMPW|CMP|BLS|BHI)`

(Mod16u (Const16 [c]) (Const16 [d])) && d != 0 => (Const16 [int16(uint16(c) % uint16(d))])
(Mod32u (Const32 [c]) (Const32 [d])) && d != 0 => (Const32 [int32(uint32(c) % uint32(d))])
(Mod64u (Const64 [c]) (Const64 [d])) && d != 0 => (Const64 [int64(uint64(c) % uint64(d))])

(Lsh64x64  (Const64 [c]) (Const64 [d])) => (Const64 [c << uint64(d)])