IVGCVSW-7173 Add Rsqrt to Tosa Ref Backend

* Added ElementwiseUnary support with a mapping for Rsqrt
* Added unittests
* Added Rsqrt EndtoEnd tests for all backends
* Changed TosaRefLayerSupport to default to false on unsupported layers


Signed-off-by: David Monahan <david.monahan@arm.com>
Change-Id: I3eaa9c684647ead61520a563815581aa68bee51b
diff --git a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
index e19462e..26cadd2 100644
--- a/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
+++ b/src/backends/tosaReference/test/TosaRefEndToEndTests.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// Copyright © 2022-2023 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
@@ -11,6 +11,7 @@
 #include "backendsCommon/test/MultiplicationEndToEndTestImpl.hpp"
 #include "backendsCommon/test/Pooling2dEndToEndTestImpl.hpp"
 #include "backendsCommon/test/ReshapeEndToEndTestImpl.hpp"
+#include "backendsCommon/test/ElementwiseUnaryEndToEndTestImpl.hpp"
 #include "backendsCommon/test/SliceEndToEndTestImpl.hpp"
 #include "backendsCommon/test/SubtractionEndToEndTestImpl.hpp"
 #include "backendsCommon/test/TransposeConvolution2dEndToEndTestImpl.hpp"
@@ -138,6 +139,12 @@
     ReshapeEndToEndFloat16<DataType::Float16>(tosaDefaultBackends);
 }
 
+TEST_CASE("TosaRefRsqrtEndtoEndTestFloat32")
+{
+    ElementwiseUnarySimpleEndToEnd<armnn::DataType::Float32>(tosaDefaultBackends,
+                                                             UnaryOperation::Rsqrt);
+}
+
 // Slice
 TEST_CASE("TosaRefSliceEndtoEndTestFloat32")
 {