func bucketShift(b uint8) uintptr {
	// Masking the shift amount allows overflow checks to be elided.
	return uintptr(1) << (b & (goarch.PtrSize*8 - 1))
}

// bucketMask returns 1<<b - 1, optimized for code generation.
func bucketMask(b uint8) uintptr {
	return bucketShift(b) - 1
}

// tophash calculates the tophash value for hash.
func tophash(hash uintptr) uint8 {
	top := uint8(hash >> (goarch.PtrSize*8 - 8))

	typeEncryptedExtensions uint8 = 8
	typeCertificate         uint8 = 11
	typeServerKeyExchange   uint8 = 12
	typeCertificateRequest  uint8 = 13
	typeServerHelloDone     uint8 = 14
	typeCertificateVerify   uint8 = 15
	typeClientKeyExchange   uint8 = 16
	typeFinished            uint8 = 20
	typeCertificateStatus   uint8 = 22
	typeKeyUpdate           uint8 = 24
	typeMessageHash         uint8 = 254 // synthetic message
)

(BRC {c} (CMPconst   x [y]) yes no) && y == int32( int8(y)) => (CGIJ  {c&^s390x.Unordered} x [ int8(y)] yes no)
(BRC {c} (CMPWconst  x [y]) yes no) && y == int32( int8(y)) => (CIJ   {c&^s390x.Unordered} x [ int8(y)] yes no)
(BRC {c} (CMPUconst  x [y]) yes no) && y == int32(uint8(y)) => (CLGIJ {c&^s390x.Unordered} x [uint8(y)] yes no)
(BRC {c} (CMPWUconst x [y]) yes no) && y == int32(uint8(y)) => (CLIJ  {c&^s390x.Unordered} x [uint8(y)] yes no)

			SupportedPoints:   []uint8{pointFormatUncompressed},
			SignatureSchemes:  []SignatureScheme{ECDSAWithP256AndSHA256},
			SupportedVersions: []uint16{VersionTLS12},
		}, ""},
		{ecdsaCert, &ClientHelloInfo{
			CipherSuites:      []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
			SupportedCurves:   []CurveID{CurveP256},
			SupportedPoints:   []uint8{pointFormatUncompressed},

type gcBits struct {
	_ sys.NotInHeap
	x uint8
}

// bytep returns a pointer to the n'th byte of b.
func (b *gcBits) bytep(n uintptr) *uint8 {
	return addb(&b.x, n)
}

// bitp returns a pointer to the byte containing bit n and a mask for
// selecting that bit from *bytep.
func (b *gcBits) bitp(n uintptr) (bytep *uint8, mask uint8) {
	return b.bytep(n / 8), 1 << (n % 8)
}

		flags |= xlFlagUsesDataDir
	}
	if j.Type == ObjectType && j.ObjectV2.InlineData() {
		flags |= xlFlagInlineData
	}
	var ecM, ecN uint8
	if j.Type == ObjectType && j.ObjectV2 != nil {
		ecM, ecN = uint8(j.ObjectV2.ErasureM), uint8(j.ObjectV2.ErasureN)
	}
	return xlMetaV2VersionHeader{
		VersionID: j.getVersionID(),
		ModTime:   j.getModTime().UnixNano(),
		Signature: j.getSignature(),

	if size <= 0 {
		return -1, EINVAL
	}
	return EpollCreate1(0)
}

//sys	FanotifyInit(flags uint, event_f_flags uint) (fd int, err error)
//sys	fanotifyMark(fd int, flags uint, mask uint64, dirFd int, pathname *byte) (err error)

func FanotifyMark(fd int, flags uint, mask uint64, dirFd int, pathname string) (err error) {
	if pathname == "" {
		return fanotifyMark(fd, flags, mask, dirFd, nil)
	}

		//   ...
		//   v77 = StoreReg <unsafe.Pointer> v67 : ctx+8[unsafe.Pointer]
		//   v78 = StoreReg <unsafe.Pointer> v68 : ctx[unsafe.Pointer]
		//   v79 = Arg <*uint8> {args} : args[*uint8] (args[*uint8])
		//   v80 = Arg <int> {args} [8] : args+8[int] (args+8[int])
		//   ...
		//   v1 = InitMem <mem>
		//
		// We can stop scanning the initial portion of the block when

// the address of the object in the heap.
// We maintain one set of mark bits for allocation and one for
// marking purposes.
type markBits struct {
	bytep *uint8
	mask  uint8
	index uintptr
}

//go:nosplit
func (s *mspan) allocBitsForIndex(allocBitIndex uintptr) markBits {
	bytep, mask := s.allocBits.bitp(allocBitIndex)
	return markBits{bytep, mask, allocBitIndex}

func (sd *SECURITY_DESCRIPTOR) RMControl() (control uint8, err error) {
	err = getSecurityDescriptorRMControl(sd, &control)
	return
}

// SetRMControl sets the security descriptor resource manager control bits.
func (sd *SECURITY_DESCRIPTOR) SetRMControl(rmControl uint8) {
	setSecurityDescriptorRMControl(sd, &rmControl)
}