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

1 files changed, 4 insertions, 2 deletions

diff --git a/src/backends/tosaReference/TosaRefLayerSupport.cpp b/src/backends/tosaReference/TosaRefLayerSupport.cpp
index 6113b5861a..238801cb98 100644
--- a/src/backends/tosaReference/TosaRefLayerSupport.cpp
+++ b/src/backends/tosaReference/TosaRefLayerSupport.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
 //
 
@@ -68,6 +68,7 @@ bool TosaRefLayerSupport::IsLayerSupported(const LayerType& type,
             }
             break;
         }
+        case LayerType::ElementwiseUnary:
         case LayerType::Pooling2d:
         case LayerType::Reshape:
         case LayerType::Slice:
@@ -89,7 +90,8 @@ bool TosaRefLayerSupport::IsLayerSupported(const LayerType& type,
             break;
         }
         default:
-            break;
+            // Default to false for all unsupported layers.
+            return false;
     }
 
     auto mappings = GetTosaMapping(nullptr, type, inputInfos, outputInfos, descriptor);