func veryclose(a, b float64) bool  { return tolerance(a, b, 4e-16) }
func soclose(a, b, e float64) bool { return tolerance(a, b, e) }
func alike(a, b float64) bool {
	switch {
	case IsNaN(a) && IsNaN(b):
		return true
	case a == b:
		return Signbit(a) == Signbit(b)
	}
	return false
}

func TestNaN(t *testing.T) {
	f64 := NaN()
	if f64 == f64 {

	// Compute the raw output value.
	prop := c.kp * (setpoint - input)
	rawOutput := prop + c.errIntegral

	// Clamp rawOutput into output.
	output := rawOutput
	if isInf(output) || isNaN(output) {
		// The input had a large enough magnitude that either it was already
		// overflowed, or some operation with it overflowed.
		// Set a flag and reset. That's the safest thing to do.
		c.reset()

// of the mantissa. It will panic if the truncation results in lost information.
func truncate64Fto32F(f float64) float32 {
	if !isExactFloat32(f) {
		panic("truncate64Fto32F: truncation is not exact")
	}
	if !math.IsNaN(f) {
		return float32(f)
	}
	// NaN bit patterns aren't necessarily preserved across conversion
	// instructions so we need to do the conversion manually.
	b := math.Float64bits(f)

	return den == 0 || diff/den < 1e-10
}

func uint64max(a, b uint64) uint64 {
	if b > a {
		return b
	}
	return a
}

func float64NaNTo0(x float64) float64 {
	if math.IsNaN(x) {
		return 0
	}
	return x
}

func qsComplete(qsc fq.QueueSetCompleter, concurrencyLimit int) fq.QueueSet {
	concurrencyDenominator := concurrencyLimit
	if concurrencyDenominator <= 0 {

					defer func() {
						if p := recover(); p != nil {
							_ = p.(ErrNaN) // re-panic if not ErrNaN
							errnan = true
						}
					}()
					f(got, xx, yy)
				}()
				if math.IsNaN(z) {
					if !errnan {
						t.Errorf("%5g %s %5g = %5s; want ErrNaN panic", x, op, y, got)
					}
					continue
				}
				if errnan {

          {"PW",
           {"ComplexAbs", "Angle", "Conj", "Abs", "Acos", "Acosh", "Asin",
            "Atan", "Atanh", "Ceil", "Cos", "Cosh", "Sin", "Exp", "Expm1",
            "Floor", "IsFinite", "IsInf", "IsNan", "Inv", "Reciprocal", "Log",
            "Log1p", "Invert", "LogicalNot", "Ndtri", "Neg", "Rint", "Round",
            "Rsqrt", "Sigmoid", "Sign", "Sinh", "Softplus", "Softsign", "Sqrt",

(FMOVDstore [off] {sym} ptr (MTVSRD x) mem) => (MOVDstore [off] {sym} ptr x mem)
(MOVDstore [off] {sym} ptr (MFVSRD x) mem) => (FMOVDstore [off] {sym} ptr x mem)

(MTVSRD (MOVDconst [c])) && !math.IsNaN(math.Float64frombits(uint64(c))) => (FMOVDconst [math.Float64frombits(uint64(c))])
(MFVSRD (FMOVDconst [c])) => (MOVDconst [int64(math.Float64bits(c))])

func.func @is_nan(%arg0: tensor<3x4xf32>) -> tensor<3x4xi1> {
  // CHECK: %[[RESULT:.*]] = "tf.NotEqual"(%arg0, %arg0) <{incompatible_shape_error = true}> : (tensor<3x4xf32>, tensor<3x4xf32>) -> tensor<3x4xi1>
  %0 = "tf.IsNan"(%arg0) : (tensor<3x4xf32>) -> tensor<3x4xi1>
  // CHECK: return %[[RESULT]]
  func.return %0 : tensor<3x4xi1>
}

// CHECK-LABEL: func @fill
// CHECK-SAME: (%[[ARG0:.*]]: tensor<*xi64>, %[[ARG1:.*]]: tensor<*xf32>)