_O_CLOEXEC   = 0x80000
	_SA_RESTORER = 0
)

type ptregs struct {
	gpr       [32]uint64
	nip       uint64
	msr       uint64
	orig_gpr3 uint64
	ctr       uint64
	link      uint64
	xer       uint64
	ccr       uint64
	softe     uint64
	trap      uint64
	dar       uint64
	dsisr     uint64
	result    uint64
}

type vreg struct {
	u [4]uint32
}

type stackt struct {

// A Uint64 is an atomic uint64. The zero value is zero.
type Uint64 struct {
	_ noCopy
	_ align64
	v uint64
}

// Load atomically loads and returns the value stored in x.
func (x *Uint64) Load() uint64 { return LoadUint64(&x.v) }

// Store atomically stores val into x.
func (x *Uint64) Store(val uint64) { StoreUint64(&x.v, val) }

func testBNEZ(a int64) (r bool)

func testGoBGE(a, b int64) bool  { return a >= b }
func testGoBGEU(a, b int64) bool { return uint64(a) >= uint64(b) }
func testGoBGT(a, b int64) bool  { return a > b }
func testGoBGTU(a, b int64) bool { return uint64(a) > uint64(b) }
func testGoBLE(a, b int64) bool  { return a <= b }
func testGoBLEU(a, b int64) bool { return uint64(a) <= uint64(b) }
func testGoBLT(a, b int64) bool  { return a < b }

	tf_stack uintptr
}

type sigcontext struct {
	sc_cookie uint64
	sc_mask   int32
	sc_reg    [32]uint64
	sc_lr     uint64
	sc_cr     uint64
	sc_xer    uint64
	sc_ctr    uint64
	sc_pc     uint64
	sc_ps     uint64
	sc_vrsave uint64
	pad_cgo_0 [8]byte
	sc_vsx    [64][16]uint8
	sc_fpscr  uint64
	sc_vscr   uint64
}

type siginfo struct {
	si_signo  int32
	si_code   int32

	si_code   int32
	si_pid    int32
	si_uid    uint32
	si_status int32
	si_addr   uint64
	si_value  [8]byte
	_reason   [40]byte
}

type gpregs struct {
	gp_x    [30]uint64
	gp_lr   uint64
	gp_sp   uint64
	gp_elr  uint64
	gp_spsr uint32
	gp_pad  int32
}

type fpregs struct {
	fp_q     [64]uint64 // actually [32]uint128
	fp_sr    uint32
	fp_cr    uint32
	fp_flags int32

	}

	if cuEntry, cuEntryOK := cu.Val(AttrEntrypc).(uint64); cuEntryOK {
		return cu, cuEntry, nil
	} else if cuLow, cuLowOK := cu.Val(AttrLowpc).(uint64); cuLowOK {
		return cu, cuLow, nil
	}

	return cu, 0, nil
}

func (d *Data) dwarf2Ranges(u *unit, base uint64, ranges int64, ret [][2]uint64) ([][2]uint64, error) {
	if ranges < 0 || ranges > int64(len(d.ranges)) {

	ss_size  uintptr
	ss_flags int32
}

type sigcontext struct {
	sc_regs      [32]uint64
	sc_fpregs    [32]uint64
	sc_mdhi      uint64
	sc_hi1       uint64
	sc_hi2       uint64
	sc_hi3       uint64
	sc_mdlo      uint64
	sc_lo1       uint64
	sc_lo2       uint64
	sc_lo3       uint64
	sc_pc        uint64
	sc_fpc_csr   uint32
	sc_used_math uint32
	sc_dsp       uint32
	sc_reserved  uint32
}

		} else {
			yhi = -yhi
		}
	}

	*y = uint64(yhi)<<32 | uint64(ylo)
}
func uint64div(n, d uint64) uint64 {
	// Check for 32 bit operands
	if uint32(n>>32) == 0 && uint32(d>>32) == 0 {
		if uint32(d) == 0 {
			panicdivide()
		}
		return uint64(uint32(n) / uint32(d))
	}
	q, _ := dodiv(n, d)
	return q
}

func uint64mod(n, d uint64) uint64 {
	// Check for 32 bit operands

	a := make([]uint64, N/64)
	for i := 0; i < b.N; i++ {
		for j := uint64(0); j < N; j++ {
			a[j/64] &^= 1 << (j % 64)
		}
	}
}

func BenchmarkBitToggle(b *testing.B) {
	const N = 64 * 8
	a := make([]uint64, N/64)
	for i := 0; i < b.N; i++ {
		for j := uint64(0); j < N; j++ {
			a[j/64] ^= 1 << (j % 64)
		}
	}
}

func BenchmarkBitSetConst(b *testing.B) {
	const N = 64
	a := make([]uint64, N)

		f          interface{}
	}{
		{64, true, 64, true, func(n int64, s uint64) int64 { return n << s }},
		{64, true, 64, false, func(n int64, s uint64) int64 { return n >> s }},
		{64, false, 64, false, func(n uint64, s uint64) uint64 { return n >> s }},
		{64, true, 32, true, func(n int64, s uint32) int64 { return n << s }},
		{64, true, 32, false, func(n int64, s uint32) int64 { return n >> s }},