b := r.BytesAt(off, 4)
	return binary.LittleEndian.Uint32(b)
}

func (r *Reader) int32At(off uint32) int32 {
	return int32(r.uint32At(off))
}

func (r *Reader) uint16At(off uint32) uint16 {
	b := r.BytesAt(off, 2)
	return binary.LittleEndian.Uint16(b)
}

func (r *Reader) uint8At(off uint32) uint8 {
	b := r.BytesAt(off, 1)
	return b[0]
}

//sys	RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey
//sys	RegQueryInfoKey(key Handle, class *uint16, classLen *uint32, reserved *uint32, subkeysLen *uint32, maxSubkeyLen *uint32, maxClassLen *uint32, valuesLen *uint32, maxValueNameLen *uint32, maxValueLen *uint32, saLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegQueryInfoKeyW

	r0, _, _ := Syscall12(procRegQueryInfoKeyW.Addr(), 12, uintptr(key), uintptr(unsafe.Pointer(class)), uintptr(unsafe.Pointer(classLen)), uintptr(unsafe.Pointer(reserved)), uintptr(unsafe.Pointer(subkeysLen)), uintptr(unsafe.Pointer(maxSubkeyLen)), uintptr(unsafe.Pointer(maxClassLen)), uintptr(unsafe.Pointer(valuesLen)), uintptr(unsafe.Poi...

	_            [6]uint32
	Status       uint32
	Status_flags uint32
	User_count   uint32
	_            [13]uint32
}

type DmIoctl struct {
	Version      [3]uint32
	Data_size    uint32
	Data_start   uint32
	Target_count uint32
	Open_count   int32
	Flags        uint32
	Event_nr     uint32
	_            uint32
	Dev          uint64
	Name         [128]byte
	Uuid         [129]byte

//go:noescape
func And8(ptr *uint8, val uint8)

//go:noescape
func And(ptr *uint32, val uint32)

//go:noescape
func Or8(ptr *uint8, val uint8)

//go:noescape
func Or(ptr *uint32, val uint32)

//go:noescape
func And32(ptr *uint32, val uint32) uint32

//go:noescape
func Or32(ptr *uint32, val uint32) uint32

//go:noescape
func And64(ptr *uint64, val uint64) uint64

//go:noescape

	frac uint64
}

type vdsoTimehands struct {
	algo         uint32
	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

	return new
}

//go:nosplit
//go:noinline
func Xchg(ptr *uint32, new uint32) uint32 {
	old := *ptr
	*ptr = new
	return old
}

//go:nosplit
//go:noinline
func Xchg64(ptr *uint64, new uint64) uint64 {
	old := *ptr
	*ptr = new
	return old
}

//go:nosplit
//go:noinline
func Xchgint32(ptr *int32, new int32) int32 {
	old := *ptr
	*ptr = new
	return old
}

	C, M, Y, K uint8
}

func (c CMYK) RGBA() (uint32, uint32, uint32, uint32) {
	// This code is a copy of the CMYKToRGB function above, except that it
	// 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
}

}

// Atomic add and return new value.
//
//go:nosplit
func Xadd(val *uint32, delta int32) uint32 {
	for {
		oval := *val
		nval := oval + uint32(delta)
		if Cas(val, oval, nval) {
			return nval
		}
	}
}

//go:noescape
func Xadduintptr(ptr *uintptr, delta uintptr) uintptr

//go:nosplit
func Xchg(addr *uint32, v uint32) uint32 {
	for {
		old := *addr
		if Cas(addr, old, v) {
			return old
		}

	return a - b>>3
}

//go:noinline
func rsbshiftRL_ssa(a, b uint32) uint32 {
	return a>>3 - b
}

//go:noinline
func andshiftRL_ssa(a, b uint32) uint32 {
	return a & (b >> 3)
}

//go:noinline
func orshiftRL_ssa(a, b uint32) uint32 {
	return a | b>>3
}

//go:noinline
func xorshiftRL_ssa(a, b uint32) uint32 {
	return a ^ b>>3
}

//go:noinline