CPU: Implement op::Sign

src/ngraph/runtime/cpu/emitter.cpp

@@ -1310,3 +1310,19 @@ void Emitter::EMITTER_DECL(EmitReduce)
         throw ngraph_error("Reduce: only vectors and matrices are currently supported");
     }
 }
+
+void Emitter::EMITTER_DECL(EmitSign)
+{
+    const element::Type& et =
+        (dynamic_pointer_cast<const TensorViewType>(n->get_arguments().at(0)->get_value_type()))
+        ->get_element_type();
+
+    TU += "    {\n"
+          "        auto arg0 = call_frame->get_tensor_view_data<" + element_type_names[TI(et)] + ">(" + to_string(inputs[0].get_index()) + ");\n"
+          "        auto out  = call_frame->get_tensor_view_data<" + element_type_names[TI(et)] + ">(" + to_string(outputs[0].get_index()) + ");\n"
+          "        EigenArray1d<" + element_type_names[TI(et)] + ">(out, "
+                   EIGEN_VECTOR_FORMAT(outputs[0].get_layout<DenseTensorViewLayout>()->get_size()) ") =\n"
+          "        EigenArray1d<" + element_type_names[TI(et)] + ">(arg0, "
+                   EIGEN_VECTOR_FORMAT(inputs[0].get_layout<DenseTensorViewLayout>()->get_size()) ").sign();\n"
+          "    }\n";
+}

src/ngraph/runtime/cpu/emitter.hpp

@@ -80,6 +80,7 @@ namespace ngraph
                 void EMITTER_DECL(EmitReshape);
                 void EMITTER_DECL(EmitFunctionCall);
                 void EMITTER_DECL(EmitReduce);
+                void EMITTER_DECL(EmitSign);
             };
         }
     }

src/ngraph/runtime/cpu/external_function.cpp

@@ -50,6 +50,7 @@
 #include "ngraph/ops/reduce.hpp"
 #include "ngraph/ops/reshape.hpp"
 #include "ngraph/ops/select.hpp"
+#include "ngraph/ops/sign.hpp"
 #include "ngraph/ops/subtract.hpp"
 #include "ngraph/ops/tuple.hpp"
 #include "ngraph/pass/assign_layout.hpp"
@@ -113,6 +114,7 @@ static const OpMap dispatcher{
     {TI(ngraph::op::Reshape), &Emitter::EmitReshape},
     {TI(ngraph::op::FunctionCall), &Emitter::EmitFunctionCall},
     {TI(ngraph::op::Reduce), &Emitter::EmitReduce},
+    {TI(ngraph::op::Sign), &Emitter::EmitSign},
 };
 
 #undef TI