}

func TestAtanh(t *testing.T) {
	for i := 0; i < len(vf); i++ {
		a := vf[i] / 10
		if f := Atanh(a); !veryclose(atanh[i], f) {
			t.Errorf("Atanh(%g) = %g, want %g", a, f, atanh[i])
		}
	}
	for i := 0; i < len(vfatanhSC); i++ {
		if f := Atanh(vfatanhSC[i]); !alike(atanhSC[i], f) {
			t.Errorf("Atanh(%g) = %g, want %g", vfatanhSC[i], f, atanhSC[i])
		}
	}
}

func TestAtan2(t *testing.T) {

  ops::Switch switch_b(root.WithOpName("switch_b"), value, cond_b);

  Output tanh_a0 = ops::Tanh(root.WithOpName("tan_a0"), switch_a.output_true);
  Output tanh_a1 = ops::Tanh(root.WithOpName("tan_a1"), tanh_a0);

  Output tanh_b0 = ops::Tanh(root.WithOpName("tan_b0"), switch_b.output_true);
  Output tanh_b1 = ops::Tanh(root.WithOpName("tan_b1"), tanh_b0);

  Output add = ops::Add(root.WithOpName("add"), tanh_a1, tanh_b1);

      %cst_2, %cst_2, %cst_2,
      %cst_7, %cst_7, %cst_7, %cst_7,
      %cst_2, %cst_2,
      %recurrent_stats, %cell_stats,
      %cst_2, %cst_2, %cst_2, %cst_2) {cell_clip = 1.000000e+01 : f32, fused_activation_function = "TANH", proj_clip = 0.000000e+00 : f32, time_major = false}
    : ( tensor<1x28x28xf32>,
        tensor<20x28xf32>, tensor<20x28xf32>, tensor<20x28xf32>, tensor<20x28xf32>,

REGISTER_GRADIENT_OP("Acosh", AcoshGrad);

Status AtanhGrad(const Scope& scope, const Operation& op,
                 const std::vector<Output>& grad_inputs,
                 std::vector<Output>* grad_outputs) {
  // y = atanh(x)
  // dy/dx = 1 / (1 - x^2)
  auto one = Cast(scope, Const(scope, 1.0), op.input(0).type());
  auto dydx = Reciprocal(scope, Sub(scope, one, Square(scope, op.input(0))));
  // grad(x) = grad(y) * conj(dy/dx)

        $filter_width, $filter_height, ActFnAttr),
    [(HasOneUse $pool_out)]>;
}

// TODO(hinsu): Also fuse ops corresponding to SIGN_BIT fused
// activation functions.
// Currently we're not fusing tanh, sigmoid, hard_swish and other activations
// those cannot be simply translated into clamping.
foreach actFnPair = [[TFL_ReluOp, TFL_AF_Relu],
                     [TFL_Relu6Op, TFL_AF_Relu6],

            "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",
            "Square", "Tan", "Tanh", "Real", "Imag", "Erf", "Erfc", "Erfinv",