github.com/inconshreveable/go-update,v0.0.0-20160112193335-8152e7eb6ccf,h1:WfD7VjIE6z8dIvMsI4/s+1qr5EL+zoIGev1BQj1eoJ8=,adf856fb49e7c5059b2edb42a31daf4a536dc698fe0728835b018150a884b678
github.com/inconshreveable/log15,v0.0.0-20180818164646-67afb5ed74ec,h1:CGkYB1Q7DSsH/ku+to+foV4agt2F2miquaLUgF6L178=,31875747bcd198c39714d38747ac77e585620f2f37d1b1e1a03b164af6762995

	return int64(ntz64(^x))
}

// logX returns logarithm of n base 2.
// n must be a positive power of 2 (isPowerOfTwoX returns true).
func log8(n int8) int64 {
	return int64(bits.Len8(uint8(n))) - 1
}
func log16(n int16) int64 {
	return int64(bits.Len16(uint16(n))) - 1
}
func log32(n int32) int64 {
	return int64(bits.Len32(uint32(n))) - 1
}
func log64(n int64) int64 {
	return int64(bits.Len64(uint64(n))) - 1
}

                                PatternRewriter &rewriter) const override {
    if (sub_op.getFusedActivationFunction() != "NONE") {
      return failure();
    }
    auto log_op = dyn_cast_or_null<TFL::LogOp>(sub_op.getRhs().getDefiningOp());
    if (!log_op || !log_op->hasOneUse()) {
      return failure();
    }
    auto sum_op = dyn_cast_or_null<TFL::SumOp>(log_op.getX().getDefiningOp());

	// result: (Rsh16Ux64 n (Const64 <typ.UInt64> [log16(c)]))
	for {
		n := v_0
		if v_1.Op != OpConst16 {
			break
		}
		c := auxIntToInt16(v_1.AuxInt)
		if !(isNonNegative(n) && isPowerOfTwo16(c)) {
			break
		}
		v.reset(OpRsh16Ux64)
		v0 := b.NewValue0(v.Pos, OpConst64, typ.UInt64)
		v0.AuxInt = int64ToAuxInt(log16(c))
		v.AddArg2(n, v0)
		return true
	}

pkg math, func Jn(int, float64) float64
pkg math, func Ldexp(float64, int) float64
pkg math, func Lgamma(float64) (float64, int)
pkg math, func Log(float64) float64
pkg math, func Log10(float64) float64
pkg math, func Log1p(float64) float64
pkg math, func Log2(float64) float64
pkg math, func Logb(float64) float64
pkg math, func Max(float64, float64) float64
pkg math, func Min(float64, float64) float64

			o1 = c.opxrrr(p, p.As, rt, r, obj.REG_NONE, true)
			o1 |= c.encRegShiftOrExt(p, &p.From, p.From.Reg) /* includes reg, op, etc */
		} else {
			o1 = c.opxrrr(p, p.As, rt, r, rf, false)
		}

	case 28: /* logop $vcon, [R], R (64 bit literal) */
		if p.Reg == REGTMP {
			c.ctxt.Diag("cannot use REGTMP as source: %v\n", p)
		}
		o := uint32(0)
		num := uint8(0)
		cls := int(p.From.Class)
		if isANDWop(p.As) {

function lesserPower(x,opt_base){const base=opt_base||10;return Math.pow(base,Math.floor(logOrLog10(x,base)));}