IVGCVSW-4624 Add a RANK Reference Implementation

 * Add Rank front end
 * Add Rank reference implementation
 * Add Rank serialization support
 * Add Scalar serialization support

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: I06e4a468c2a84e79bae2e6c5348596bbbf853b4b

1 files changed, 47 insertions, 0 deletions

diff --git a/src/armnn/layers/RankLayer.cpp b/src/armnn/layers/RankLayer.cpp
new file mode 100644
index 0000000000..f1a24b1633
--- /dev/null
+++ b/src/armnn/layers/RankLayer.cpp
@@ -0,0 +1,47 @@
+//
+// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RankLayer.hpp"
+
+#include "LayerCloneBase.hpp"
+
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+namespace armnn
+{
+
+RankLayer::RankLayer(const char* name)
+        : Layer(1, 1, LayerType::Rank, name)
+{}
+
+std::unique_ptr<IWorkload> RankLayer::CreateWorkload(const IWorkloadFactory& factory) const
+{
+    RankQueueDescriptor descriptor;
+    return factory.CreateRank(descriptor, PrepInfoAndDesc(descriptor));
+}
+
+Layer* RankLayer::Clone(Graph& graph) const
+{
+    RankLayer* clone = CloneBase<RankLayer>(graph, GetName());
+    return clone;
+}
+
+void RankLayer::ValidateTensorShapesFromInputs(ShapeInferenceMethod shapeInferenceMethod)
+{
+    IgnoreUnused(shapeInferenceMethod);
+    VerifyLayerConnections(1, CHECK_LOCATION());
+
+    ConditionalThrowIfNotEqual<LayerValidationException>(
+            "Rank: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+            GetOutputSlot(0).GetTensorInfo().GetShape(), {TensorShape{Dimensionality::Scalar}});
+}
+
+void RankLayer::Accept(ILayerVisitor& visitor) const
+{
+    visitor.VisitRankLayer(this, GetName());
+}
+
+} //namespace armnn
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