_HW_NCPUONLINE = 25
)

func sysctlInt(mib []uint32) (int32, bool) {
	var out int32
	nout := unsafe.Sizeof(out)
	ret := sysctl(&mib[0], uint32(len(mib)), (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
	if ret < 0 {
		return 0, false
	}
	return out, true
}

func sysctlUint64(mib []uint32) (uint64, bool) {
	var out uint64
	nout := unsafe.Sizeof(out)

// A Uint32 is an atomic uint32. The zero value is zero.
type Uint32 struct {
	_ noCopy
	v uint32
}

// Load atomically loads and returns the value stored in x.
func (x *Uint32) Load() uint32 { return LoadUint32(&x.v) }

// Store atomically stores val into x.
func (x *Uint32) Store(val uint32) { StoreUint32(&x.v, val) }

		dev := uint64(sys.Rdev) // May be int32 or uint32
		switch runtime.GOOS {
		case "aix":
			var major, minor uint32
			major = uint32((dev & 0x3fffffff00000000) >> 32)
			minor = uint32((dev & 0x00000000ffffffff) >> 0)
			h.Devmajor, h.Devminor = int64(major), int64(minor)
		case "linux":
			// Copied from golang.org/x/sys/unix/dev_linux.go.
			major := uint32((dev & 0x00000000000fff00) >> 8)

type Regs386 struct {
	AX    uint32
	BX    uint32
	CX    uint32
	DX    uint32
	DI    uint32
	SI    uint32
	BP    uint32
	SP    uint32
	SS    uint32
	FLAGS uint32
	IP    uint32
	CS    uint32
	DS    uint32
	ES    uint32
	FS    uint32
	GS    uint32
}

// RegsAMD64 is the Mach-O AMD64 register structure.
type RegsAMD64 struct {
	AX    uint64
	BX    uint64

	}
	{
		var in int32 = (1 << 30) + 1
		var p int32
		got := loadHitStore32(in, &p)
		want := int64(in * in)
		if got != want {
			t.Errorf("testLoadHitStore (int32) failed. want = %d, got = %d", want, got)
		}
	}
	{
		var in uint32 = (1 << 30) + 1
		var p uint32
		got := loadHitStoreU32(in, &p)
		want := uint64(in * in)
		if got != want {

	floatsave         floatingsavearea
	seggs             uint32
	segfs             uint32
	seges             uint32
	segds             uint32
	edi               uint32
	esi               uint32
	ebx               uint32
	edx               uint32
	ecx               uint32
	eax               uint32
	ebp               uint32
	eip               uint32
	segcs             uint32
	eflags            uint32

	SizeOfCode                  uint32
	SizeOfInitializedData       uint32
	SizeOfUninitializedData     uint32
	AddressOfEntryPoint         uint32
	BaseOfCode                  uint32
	BaseOfData                  uint32
	ImageBase                   uint32
	SectionAlignment            uint32
	FileAlignment               uint32
	MajorOperatingSystemVersion uint16
	MinorOperatingSystemVersion uint16

// https://lemire.me/blog/2016/06/30/fast-random-shuffling
func (r *pcgRand) uint32n(n uint32) uint32 {
	v := r.uint32()
	prod := uint64(v) * uint64(n)
	low := uint32(prod)
	if low < n {
		thresh := uint32(-int32(n)) % n
		for low < thresh {
			v = r.uint32()
			prod = uint64(v) * uint64(n)
			low = uint32(prod)
		}
	}
	return uint32(prod >> 32)
}

// exp2 generates n with probability 1/2^(n+1).

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: int32(nsec)}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: int32(usec)}
}

func SetKevent(k *Kevent_t, fd, mode, flags int) {
	k.Ident = uint32(fd)
	k.Filter = uint32(mode)
	k.Flags = uint32(flags)
}

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint32(length)
}

func (msghdr *Msghdr) SetControllen(length int) {

}

type context struct {
	contextflags uint32
	r0           uint32
	r1           uint32
	r2           uint32
	r3           uint32
	r4           uint32
	r5           uint32
	r6           uint32
	r7           uint32
	r8           uint32
	r9           uint32
	r10          uint32
	r11          uint32
	r12          uint32

	spr  uint32
	lrr  uint32
	pc   uint32
	cpsr uint32

	fpscr   uint32