IVGCVSW-2371 Add Rsqrt Ref implementation

*Added Unit Tests

Change-Id: I6cceb8e6dcda35ce08415f8e5ca86019a64d26e3
diff --git a/src/backends/reference/workloads/RefRsqrtFloat32Workload.cpp b/src/backends/reference/workloads/RefRsqrtFloat32Workload.cpp
new file mode 100644
index 0000000..c08dbf0
--- /dev/null
+++ b/src/backends/reference/workloads/RefRsqrtFloat32Workload.cpp
@@ -0,0 +1,25 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RefRsqrtFloat32Workload.hpp"
+
+#include "RefWorkloadUtils.hpp"
+#include "Rsqrt.hpp"
+
+#include <Profiling.hpp>
+
+namespace armnn
+{
+
+void RefRsqrtFloat32Workload::Execute() const
+{
+    ARMNN_SCOPED_PROFILING_EVENT(Compute::CpuRef, "RefRsqrtFloat32Workload_Execute");
+
+    Rsqrt(GetInputTensorDataFloat(0, m_Data),
+          GetOutputTensorDataFloat(0, m_Data),
+          GetTensorInfo(m_Data.m_Inputs[0]));
+}
+
+} //namespace armnn