IVGCVSW-3073 Refactor reference DepthwiseConvolution2d workloads

Change-Id: I3cf8d9dbc4f8c95e0e2311505dd7e9f9069f1ab5
Signed-off-by: Ruomei Yan <ruomei.yan@arm.com>
diff --git a/src/backends/reference/workloads/RefDepthwiseConvolution2dWorkload.hpp b/src/backends/reference/workloads/RefDepthwiseConvolution2dWorkload.hpp
new file mode 100644
index 0000000..6d7037f
--- /dev/null
+++ b/src/backends/reference/workloads/RefDepthwiseConvolution2dWorkload.hpp
@@ -0,0 +1,39 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#include <backendsCommon/Workload.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+#include "Decoders.hpp"
+#include "Encoders.hpp"
+
+#include <armnn/TypesUtils.hpp>
+
+namespace armnn
+{
+
+class RefDepthwiseConvolution2dWorkload : public BaseWorkload<DepthwiseConvolution2dQueueDescriptor> {
+public:
+    explicit RefDepthwiseConvolution2dWorkload(const DepthwiseConvolution2dQueueDescriptor &descriptor,
+                                               const WorkloadInfo &info);
+
+    void PostAllocationConfigure() override;
+
+    virtual void Execute() const override;
+
+private:
+
+    std::unique_ptr <ScopedCpuTensorHandle> m_Weight;
+    std::unique_ptr <ScopedCpuTensorHandle> m_Bias;
+
+    std::unique_ptr <Decoder<float>> m_InputDecoder;
+    std::unique_ptr <Encoder<float>> m_OutputEncoder;
+    std::unique_ptr <Decoder<float>> m_FilterDecoder;
+    std::unique_ptr <Decoder<float>> m_BiasDecoder;
+
+    TensorShape m_InputShape;
+    TensorShape m_OutputShape;
+    TensorShape m_FilterShape;
+};
+
+} //namespace armnn