IVGCVSW-5410 Add front-end support for CAST
IVGCVSW-5415 Add TfLiteParser support for CAST

 * Added front end support for CAST, including support in the
Reference workload, Serialization, Deserializtion, Unit tests, and
TfLiteParser.

Signed-off-by: mathad01 <matthew.haddon@arm.com>
Change-Id: Iaf670ca5912a21ed6bc84f7f83a68b42154846bb
diff --git a/src/backends/reference/workloads/RefCastWorkload.hpp b/src/backends/reference/workloads/RefCastWorkload.hpp
new file mode 100644
index 0000000..6742ef0
--- /dev/null
+++ b/src/backends/reference/workloads/RefCastWorkload.hpp
@@ -0,0 +1,24 @@
+//
+// Copyright © 2021 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backendsCommon/Workload.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+#include "RefWorkloadUtils.hpp"
+
+namespace armnn
+{
+
+
+class RefCastWorkload : public BaseWorkload<CastQueueDescriptor>
+{
+public:
+    using BaseWorkload<CastQueueDescriptor>::BaseWorkload;
+    void Execute() const override;
+};
+
+} //namespace armnn
+