IVGCVSW-3975 Add reference workload for LOG_SOFTMAX

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: I10bb7133e0e2d6d7199abdf39562b1226bbbd3e7
diff --git a/src/backends/backendsCommon/test/layerTests/LogSoftmaxTestImpl.hpp b/src/backends/backendsCommon/test/layerTests/LogSoftmaxTestImpl.hpp
new file mode 100644
index 0000000..18a14cc
--- /dev/null
+++ b/src/backends/backendsCommon/test/layerTests/LogSoftmaxTestImpl.hpp
@@ -0,0 +1,33 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "LayerTestResult.hpp"
+
+#include <ResolveType.hpp>
+
+#include <backendsCommon/IBackendInternal.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+template<armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
+LayerTestResult<T, 4> LogSoftmaxTest1(
+    armnn::IWorkloadFactory& workloadFactory,
+    const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager);
+
+template<armnn::DataType ArmnnType, typename T = armnn::ResolveType<ArmnnType>>
+LayerTestResult<T, 4> LogSoftmaxTest2(
+    armnn::IWorkloadFactory& workloadFactory,
+    const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager);
+
+template<armnn::DataType ArmnnType,typename T = armnn::ResolveType<ArmnnType>>
+LayerTestResult<T, 4> LogSoftmaxTest3(
+    armnn::IWorkloadFactory& workloadFactory,
+   const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager);
+
+template<armnn::DataType ArmnnType,typename T = armnn::ResolveType<ArmnnType>>
+LayerTestResult<T, 4> LogSoftmaxTest4(
+    armnn::IWorkloadFactory& workloadFactory,
+   const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager);