IVGCVSW-3974 Add serialization support for LOG_SOFTMAX

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I0777abc672dd7d5c9fadaed27b0e776ac591d2c7
diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index 0e8c894..11f833c 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -467,7 +467,22 @@
                                              const armnn::LogSoftmaxDescriptor& logSoftmaxDescriptor,
                                              const char* name)
 {
-    throw armnn::UnimplementedException("SerializerVisitor::VisitLogSoftmaxLayer() is not implemented");
+    // Create FlatBuffer BaseLayer
+    auto flatBufferLogSoftmaxBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_LogSoftmax);
+
+    // Create the FlatBuffer LogSoftmaxDescriptor
+    auto flatBufferLogSoftmaxDesc =
+        serializer::CreateLogSoftmaxDescriptor(m_flatBufferBuilder,
+                                               logSoftmaxDescriptor.m_Beta,
+                                               logSoftmaxDescriptor.m_Axis);
+
+    // Create the FlatBuffer LogSoftmaxLayer
+    auto flatBufferLogSoftmaxLayer =
+        serializer::CreateLogSoftmaxLayer(m_flatBufferBuilder,
+                                          flatBufferLogSoftmaxBaseLayer,
+                                          flatBufferLogSoftmaxDesc);
+
+    CreateAnyLayer(flatBufferLogSoftmaxLayer.o, serializer::Layer::Layer_LogSoftmaxLayer);
 }
 
 void SerializerVisitor::VisitLstmLayer(const armnn::IConnectableLayer* layer,