// Uint64 returns a pseudo-random 64-bit value as a uint64.
func (r *Rand) Uint64() uint64 {
	if r.s64 != nil {
		return r.s64.Uint64()
	}
	return uint64(r.Int63())>>31 | uint64(r.Int63())<<32
}

// Int31 returns a non-negative pseudo-random 31-bit integer as an int32.
func (r *Rand) Int31() int32 { return int32(r.Int63() >> 32) }

// Int returns a non-negative pseudo-random int.
func (r *Rand) Int() int {

	return sb.setUintXX(arch, r, v, int64(arch.PtrSize))
}

func (sb *SymbolBuilder) SetUintptr(arch *sys.Arch, r int64, v uintptr) int64 {
	return sb.setUintXX(arch, r, uint64(v), int64(arch.PtrSize))
}

func (sb *SymbolBuilder) SetAddrPlus(arch *sys.Arch, off int64, tgt Sym, add int64) int64 {
	if sb.Type() == 0 {
		sb.SetType(sym.SDATA)
	}
	if off+int64(arch.PtrSize) > sb.size {

}

func BenchmarkInt64N1e8(b *testing.B) {
	r := testRand()
	var t int64
	arg := keep(int64(1e8))
	for n := b.N; n > 0; n-- {
		t += r.Int64N(arg)
	}
	Sink = uint64(t)
}

func BenchmarkInt64N1e9(b *testing.B) {
	r := testRand()
	var t int64
	arg := keep(int64(1e9))
	for n := b.N; n > 0; n-- {
		t += r.Int64N(arg)
	}
	Sink = uint64(t)
}

func sdivisibleOK64(c int64) bool { return sdivisibleOK(64, c) }

type sdivisibleData struct {
	k   int64  // trailingZeros(c)
	m   uint64 // m * (c>>k) mod 2^n == 1 multiplicative inverse of odd portion modulo 2^n
	a   uint64 // ⎣(2^(n-1) - 1)/ (c>>k)⎦ & -(1<<k) additive constant
	max uint64 // ⎣(2 a) / (1<<k)⎦ max value to for divisibility
}

func sdivisible(n uint, c int64) sdivisibleData {
	d := uint64(c)

	constraint types.Type
}

type iimporter struct {
	exportVersion int64
	ipath         string
	version       int

	stringData  []byte
	stringCache map[uint64]string
	pkgCache    map[uint64]*types.Package

	declData    []byte
	pkgIndex    map[*types.Package]map[string]uint64
	typCache    map[uint64]types.Type
	tparamIndex map[ident]*types.TypeParam

	fake          fakeFileSet

		}
		out.Write64(uint64(sectoff))
		out.Write64(uint64(hiRel) | uint64(elfsym)<<32)
		out.Write64(uint64(r.Xadd))
		out.Write64(uint64(sectoff + 4))
		out.Write64(uint64(loRel) | uint64(hi20ElfSym)<<32)
		out.Write64(uint64(0))

	case objabi.R_RISCV_TLS_LE:
		out.Write64(uint64(sectoff))
		out.Write64(uint64(elf.R_RISCV_TPREL_HI20) | uint64(elfsym)<<32)
		out.Write64(uint64(r.Xadd))

			if err := binary.Read(sr, binary.BigEndian, shdr); err != nil {
				return nil, err
			}
			s.Name = cstring(shdr.Sname[:])
			s.VirtualAddress = uint64(shdr.Svaddr)
			s.Size = uint64(shdr.Ssize)
			scnptr = uint64(shdr.Sscnptr)
			s.Type = shdr.Sflags
			s.Relptr = uint64(shdr.Srelptr)
			s.Nreloc = uint32(shdr.Snreloc)
		case U64_TOCMAGIC:
			shdr := new(SectionHeader64)

	Read_bytes                uint64
	Write_bytes               uint64
	Cancelled_write_bytes     uint64
	Nvcsw                     uint64
	Nivcsw                    uint64
	Ac_utimescaled            uint64
	Ac_stimescaled            uint64
	Cpu_scaled_run_real_total uint64
	Freepages_count           uint64
	Freepages_delay_total     uint64
	Thrashing_count           uint64
	Thrashing_delay_total     uint64

	func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Start) },         // optional uint64 memory_offset = 2
	func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Limit) },         // optional uint64 memory_limit = 3
	func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Offset) },        // optional uint64 file_offset = 4

}

// Int64 returns v's value as an int64. It panics
// if v is not a signed integer.
func (v Value) Int64() int64 {
	if g, w := v.Kind(), KindInt64; g != w {
		panic(fmt.Sprintf("Value kind is %s, not %s", g, w))
	}
	return int64(v.num)
}

// Uint64 returns v's value as a uint64. It panics
// if v is not an unsigned integer.
func (v Value) Uint64() uint64 {