From b89b05f048a566a8c825f1d223966bc5a6abc3d5 Mon Sep 17 00:00:00 2001
From: narpra01 <narumol.prangnawarat@arm.com>
Date: Wed, 16 Jan 2019 09:53:09 +0000
Subject: IVGCVSW-2508 Add no-op factory implementations and layer for Gather
 operator  * Added GatherQueueDescriptor to WorkloadData  * Added CreateGather
 function in WorkloadFactory.hpp  * Added stub implementation of the
 CreateGreater function in workload factories  * Added GatherLayer stub
 implementation  * Added AddGatherLayer to Network  * Added IsGatherSupported
 to LayerSupportBase

Change-Id: I0408fd54e88a7d4e3d9e1c2811a9323f0da52a04
---
 src/armnn/layers/GatherLayer.cpp | 37 ++++++++++++++++++++++++++++++++++++
 src/armnn/layers/GatherLayer.hpp | 41 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 src/armnn/layers/GatherLayer.cpp
 create mode 100644 src/armnn/layers/GatherLayer.hpp

(limited to 'src/armnn/layers')

diff --git a/src/armnn/layers/GatherLayer.cpp b/src/armnn/layers/GatherLayer.cpp
new file mode 100644
index 0000000000..2e5d011599
--- /dev/null
+++ b/src/armnn/layers/GatherLayer.cpp
@@ -0,0 +1,37 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "GatherLayer.hpp"
+#include "LayerCloneBase.hpp"
+
+#include <armnn/TypesUtils.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+namespace armnn
+{
+
+GatherLayer::GatherLayer(const char* name)
+    : Layer(2, 1, LayerType::Gather, name)
+{
+}
+
+std::unique_ptr<IWorkload> GatherLayer::CreateWorkload(const armnn::Graph& graph,
+                                                       const armnn::IWorkloadFactory& factory) const
+{
+    GatherQueueDescriptor descriptor;
+    return factory.CreateGather(descriptor, PrepInfoAndDesc(descriptor, graph));
+}
+
+GatherLayer* GatherLayer::Clone(Graph& graph) const
+{
+    return CloneBase<GatherLayer>(graph, GetName());
+}
+
+void GatherLayer::ValidateTensorShapesFromInputs()
+{
+}
+
+} // namespace armnn
diff --git a/src/armnn/layers/GatherLayer.hpp b/src/armnn/layers/GatherLayer.hpp
new file mode 100644
index 0000000000..7b3aebe77e
--- /dev/null
+++ b/src/armnn/layers/GatherLayer.hpp
@@ -0,0 +1,41 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "Layer.hpp"
+
+namespace armnn
+{
+
+/// This layer represents a Gather operator.
+class GatherLayer : public Layer
+{
+public:
+    /// Makes a workload for the Gather type.
+    /// @param [in] graph The graph where this layer can be found.
+    /// @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 Graph& graph,
+                                                      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.
+    GatherLayer* Clone(Graph& graph) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref GatherLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+protected:
+    /// Constructor to create a GatherLayer.
+    /// @param [in] name Optional name for the layer.
+    GatherLayer(const char* name);
+
+    /// Default destructor
+    ~GatherLayer() = default;
+};
+
+} // namespace armnn
-- 
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