CPU: Restore use of the single-specification helper macro EMITTER_DECL (#495)

in emitter function definitions

src/ngraph/runtime/cpu/cpu_emitter.hpp

@@ -25,8 +25,9 @@
 #include "ngraph/runtime/cpu/cpu_tensor_view_wrapper.hpp"
 
 #define EMITTER_DECL(E)                                                                            \
-    E(codegen::CodeWriter& writer,                                                                 \
-      const ngraph::Node* n,                                                                       \
+    E(ngraph::runtime::cpu::CPU_ExternalFunction* external_function,                               \
+      codegen::CodeWriter& writer,                                                                 \
+      const ngraph::Node* node,                                                                    \
       const std::vector<ngraph::runtime::cpu::TensorViewWrapper>& args,                            \
       const std::vector<ngraph::runtime::cpu::TensorViewWrapper>& out)
 

src/ngraph/runtime/cpu/cpu_external_function.cpp

@@ -677,7 +677,7 @@ using namespace ngraph::runtime;
             }
             if (func_name.empty())
             {
-                handler->second(writer, node.get(), in, out);
+                handler->second(this, writer, node.get(), in, out);
             }
             else
             {
@@ -952,7 +952,7 @@ string runtime::cpu::CPU_ExternalFunction::emit_op_as_function(const Node& node,
     writer << "\n)\n";
     writer << "{\n";
     writer.indent++;
-    handler->second(writer, &node, in, out);
+    handler->second(this, writer, &node, in, out);
     writer.indent--;
     writer << "}\n";
 

src/ngraph/runtime/cpu/cpu_external_function.hpp

@@ -43,7 +43,8 @@ namespace ngraph
             class CPU_Emitter;
             class CPU_CallFrame;
 
-            using OpFunction = std::function<void(codegen::CodeWriter&,
+            using OpFunction = std::function<void(CPU_ExternalFunction* external_function,
+                                                  codegen::CodeWriter&,
                                                   const ngraph::Node*,
                                                   const std::vector<TensorViewWrapper>& inputs,
                                                   const std::vector<TensorViewWrapper>& outputs)>;