[TF FE] Support complex tensors for Reciprocal operations (openvinoto…

…olkit#23355)

### Details:
- *Extended loader Reciprocal by propagating ComplexTypeMark from input
to output and to represent output complex type tensor as a
floating-point type tensor with an auxiliary dimension that concatenates
real and imaginary parts of complex tensor.*
- *Performed reciprocal for complex numbers.*
- *Wrapped the complex result with ComplexTypeMark and returned the
result*

### Tickets:
 - openvinotoolkit#23234

---------

Co-authored-by: Roman Kazantsev <roman.kazantsev@intel.com>

src/frontends/tensorflow_common/src/op/reciprocal.cpp

@@ -3,6 +3,12 @@
 //
 
 #include "common_op_table.hpp"
+#include "helper_ops/complex_type_mark.hpp"
+#include "openvino/op/add.hpp"
+#include "openvino/op/concat.hpp"
+#include "openvino/op/divide.hpp"
+#include "openvino/op/gather.hpp"
+#include "openvino/op/negative.hpp"
 #include "openvino/op/power.hpp"
 #include "utils.hpp"
 
@@ -16,8 +22,34 @@ namespace op {
 
 OutputVector translate_reciprocal_op(const NodeContext& node) {
     // computes element-wise 1/x, where x - input
-    default_op_checks(node, 1, {"Reciprocal"});
+    default_op_checks(node, 1, {"Reciprocal"}, true);
     auto x = node.get_input(0);
+    auto complex_type_mark_x = as_type_ptr<ComplexTypeMark>(x.get_node_shared_ptr());
+    if (complex_type_mark_x) {
+        x = complex_type_mark_x->input_value(0);
+        auto minus_one = make_shared<v0::Constant>(element::i32, Shape{1}, -1);
+        auto two = create_same_type_const_scalar<int32_t>(x, 2);
+        auto gather_index_real = make_shared<v0::Constant>(element::i32, Shape{1}, 0);
+        auto gather_index_imag = make_shared<v0::Constant>(element::i32, Shape{1}, 1);
+        auto x_real = make_shared<v8::Gather>(x, gather_index_real, minus_one)->output(0);
+        auto x_imag = make_shared<v8::Gather>(x, gather_index_imag, minus_one)->output(0);
+
+        // compute (a^2+b^2)
+        auto real_squared_norm = make_shared<v1::Power>(x_real, two);
+        auto img_squared_norm = make_shared<v1::Power>(x_imag, two);
+        auto squared_norm = make_shared<v1::Add>(real_squared_norm, img_squared_norm);
+
+        // compute 1/(a+bi) = (a-bi)/(a^2+b^2)
+        auto complex_reciprocal = make_shared<v1::Divide>(
+            make_shared<v0::Concat>(OutputVector{x_real, make_shared<ov::op::v0::Negative>(x_imag)}, -1),
+            squared_norm);
+        auto complex_result =
+            make_shared<ComplexTypeMark>(complex_reciprocal, complex_type_mark_x->get_complex_part_type());
+        set_node_name(node.get_name(), complex_reciprocal);
+        return {complex_result};
+    }
+
+    // For real numbers, computes element-wise 1/x, where x - input
     auto minus_one_const = create_same_type_const_scalar<int32_t>(x, -1);
     auto reciprocal = make_shared<v1::Power>(x, minus_one_const);
     set_node_name(node.get_name(), reciprocal);

tests/layer_tests/tensorflow_tests/test_tf_Reciprocal.py

@@ -41,3 +41,46 @@ def test_reciprocal_basic(self, params, ie_device, precision, ir_version, temp_d
         self._test(*self.create_reciprocal_net(**params),
                    ie_device, precision, ir_version, temp_dir=temp_dir,
                    use_legacy_frontend=use_legacy_frontend)
+
+class TestComplexReciprocal(CommonTFLayerTest):
+    def _prepare_input(self, inputs_info):
+        rng = np.random.default_rng()
+        assert 'param_real_1:0' in inputs_info
+        assert 'param_imag_1:0' in inputs_info
+        param_real_shape_1 = inputs_info['param_real_1:0']
+        param_imag_shape_1 = inputs_info['param_imag_1:0']
+        inputs_data = {}
+        inputs_data['param_real_1:0'] = 4 * rng.random(param_real_shape_1).astype(np.float32) - 2
+        inputs_data['param_imag_1:0'] = 4 * rng.random(param_imag_shape_1).astype(np.float32) - 2
+
+        return inputs_data
+
+    def create_complex_reciprocal_net(self, x_shape,x_type):
+        tf.compat.v1.reset_default_graph()
+        # Create the graph and model
+        with tf.compat.v1.Session() as sess:
+            param_real1 = tf.compat.v1.placeholder(np.float32, x_shape, 'param_real_1')
+            param_imag1 = tf.compat.v1.placeholder(np.float32, x_shape, 'param_imag_1')
+            complex_x = tf.raw_ops.Complex(real=param_real1, imag=param_imag1)
+            reciprocal = tf.raw_ops.Reciprocal(x=complex_x)
+            real = tf.raw_ops.Real(input=reciprocal)
+            img = tf.raw_ops.Imag(input=reciprocal)
+            tf.compat.v1.global_variables_initializer()
+            tf_net = sess.graph_def
+
+        return tf_net, None
+
+    test_data_basic = [
+        dict(x_shape=[], x_type=np.float32),
+        dict(x_shape=[2, 3], x_type=np.float32),
+        dict(x_shape=[4, 1, 3], x_type=np.float32),
+    ]    
+
+    @pytest.mark.parametrize("params", test_data_basic)
+    @pytest.mark.precommit_tf_fe
+    @pytest.mark.nightly
+    def test_complex_reciprocal(self, params, ie_device, precision, ir_version, temp_dir,
+                                use_legacy_frontend):
+        self._test(*self.create_complex_reciprocal_net(**params),
+                   ie_device, precision, ir_version, temp_dir=temp_dir,
+                   use_legacy_frontend=use_legacy_frontend)