state.encodeUint(0)
		}`,
	},
	{
		"complex64",
		"Complex64",
		"0+0i",
		`rpart := floatBits(float64(real(x)))
		ipart := floatBits(float64(imag(x)))
		state.encodeUint(rpart)
		state.encodeUint(ipart)`,
	},
	{
		"complex128",
		"Complex128",
		"0+0i",
		`rpart := floatBits(real(x))
		ipart := floatBits(imag(x))
		state.encodeUint(rpart)
		state.encodeUint(ipart)`,
	},
	{
		"float32",

	if !ok {
		// It is kind complex64 but not type complex64. TODO: We can handle this unsafely.
		return false
	}
	for _, x := range slice {
		if x != 0+0i || state.sendZero {
			rpart := floatBits(float64(real(x)))
			ipart := floatBits(float64(imag(x)))
			state.encodeUint(rpart)
			state.encodeUint(ipart)
		}
	}
	return true
}

func encComplex128Array(state *encoderState, v reflect.Value) bool {

// swizzling.
func floatBits(f float64) uint64 {
	u := math.Float64bits(f)
	return bits.ReverseBytes64(u)
}

// encFloat encodes the floating point value (float32 float64) referenced by v.
func encFloat(i *encInstr, state *encoderState, v reflect.Value) {
	f := v.Float()
	if f != 0 || state.sendZero {
		bits := floatBits(f)
		state.update(i)
		state.encodeUint(bits)
	}
}

		return
	}

	ok = true
	return
}

// decimal power of ten to binary power of two.
var powtab = []int{1, 3, 6, 9, 13, 16, 19, 23, 26}

func (d *decimal) floatBits(flt *floatInfo) (b uint64, overflow bool) {
	var exp int
	var mant uint64

	// Zero is always a special case.
	if d.nd == 0 {
		mant = 0
		exp = flt.bias
		goto out
	}

		// decimal floats
		{FloatLit, "0.", "0.", ""},
		{FloatLit, "123.", "123.", ""},
		{FloatLit, "0123.", "0123.", ""},

		{FloatLit, ".0", ".0", ""},
		{FloatLit, ".123", ".123", ""},
		{FloatLit, ".0123", ".0123", ""},

		{FloatLit, "0.0", "0.0", ""},
		{FloatLit, "123.123", "123.123", ""},
		{FloatLit, "0123.0123", "0123.0123", ""},

		{FloatLit, "0e0", "0e0", ""},

func makeFromLiteral(lit string, kind syntax.LitKind) constant.Value {
	return constant.MakeFromLiteral(lit, kind2tok[kind], 0)
}

var kind2tok = [...]token.Token{
	syntax.IntLit:    token.INT,
	syntax.FloatLit:  token.FLOAT,
	syntax.ImagLit:   token.IMAG,
	syntax.RuneLit:   token.CHAR,
	syntax.StringLit: token.STRING,

// TODO(gri) With the 'i' (imaginary) suffix now permitted on integer
// and floating-point numbers, having a single ImagLit does
// not represent the literal kind well anymore. Remove it?
const (
	IntLit LitKind = iota
	FloatLit
	ImagLit
	RuneLit
	StringLit
)

type Operator uint

//go:generate stringer -type Operator -linecomment tokens.go

const (
	_ Operator = iota

	// Def is the : in :=

				ok = false
			}
		}
		s.nextch()
		kind = FloatLit
		if s.ch == '+' || s.ch == '-' {
			s.nextch()
		}
		digsep = s.digits(10, nil) | digsep&2 // don't lose sep bit
		if digsep&1 == 0 && ok {
			s.errorf("exponent has no digits")
			ok = false
		}
	} else if prefix == 'x' && kind == FloatLit && ok {
		s.errorf("hexadecimal mantissa requires a 'p' exponent")
		ok = false
	}

// setConst sets x to the untyped constant for literal lit.
func (x *operand) setConst(k syntax.LitKind, lit string) {
	var kind BasicKind
	switch k {
	case syntax.IntLit:
		kind = UntypedInt
	case syntax.FloatLit:
		kind = UntypedFloat
	case syntax.ImagLit:
		kind = UntypedComplex
	case syntax.RuneLit:
		kind = UntypedRune
	case syntax.StringLit:
		kind = UntypedString
	default:
		panic("unreachable")
	}

	// 386:"MOVL\t[$]-252645135","IMULL",-"IDIVL"
	// arm64:`SMULH`,-`DIV`
	// arm:`MOVW`,`MUL`,-`.*udiv`
	b := n2 / 17 // signed

	return a, b
}

func FloatDivs(a []float32) float32 {
	// amd64:`DIVSS\s8\([A-Z]+\),\sX[0-9]+`
	// 386/sse2:`DIVSS\s8\([A-Z]+\),\sX[0-9]+`
	return a[1] / a[2]
}

func Pow2Mods(n1 uint, n2 int) (uint, int) {
	// 386:"ANDL\t[$]31",-"DIVL"