IVGCVSW-6856 Add GATHERNd FrontEnd and Ref Implementation

* Add front end
* Add reference workload
* Add unit tests
* Add EndToEnd test

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: I4cebd17b18476df86162e2dda3366c10e80bd2f8

1 files changed, 48 insertions, 0 deletions

diff --git a/src/armnn/layers/GatherNdLayer.hpp b/src/armnn/layers/GatherNdLayer.hpp
new file mode 100644
index 0000000000..9e07715f90
--- /dev/null
+++ b/src/armnn/layers/GatherNdLayer.hpp
@@ -0,0 +1,48 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "Layer.hpp"
+
+namespace armnn
+{
+
+/// This layer represents a GatherNd operator.
+class GatherNdLayer : public Layer
+{
+public:
+    /// Makes a workload for the Gather type.
+    /// @param [in] factory The workload factory which will create the workload.
+    /// @return A pointer to the created workload, or nullptr if not created.
+    virtual std::unique_ptr<IWorkload> CreateWorkload(const IWorkloadFactory& factory) const override;
+
+    /// Creates a dynamically-allocated copy of this layer.
+    /// @param [in] graph The graph into which this layer is being cloned.
+    GatherNdLayer* Clone(Graph& graph) const override;
+
+    /// Infers the output shapes from given input shapes and layer properties.
+    /// @param [in] inputShapes The input shapes layer has.
+    /// @return A vector to the inferred output shape.
+    std::vector<TensorShape> InferOutputShapes(const std::vector<TensorShape>& inputShapes) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref GatherNdLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+    ARMNN_NO_DEPRECATE_WARN_BEGIN
+    void Accept(ILayerVisitor& visitor) const override;
+    ARMNN_NO_DEPRECATE_WARN_END
+
+protected:
+    /// Constructor to create a GatherNdLayer.
+    /// @param [in] name Optional name for the layer.
+    GatherNdLayer(const char* name);
+
+    /// Default destructor
+    ~GatherNdLayer() = default;
+};
+
+} // namespace armnn