IVGCVSW-7164 Implement TosaRefBackend::OptimizeSubgraphView

* Added TosaRefBackend::OptimizeSubgraphView implementation.
* Generalised TosaRefLayerSupport::IsLayerSupported to work with any
  operator.
* Changed TosaCommon.hpp utils to inline functions.
* Added source files for TosaMappings.hpp and AdditionOperator.hpp.
* Fixed multiple defines issue with HALF_ROUND_STYLE and
  HALF_ROUND_TIES_TO_EVEN.

Signed-off-by: Matthew Sloyan <matthew.sloyan@arm.com>
Change-Id: Ib2576ec3fb97faa3a2256b2fb93ec16ac8745760

1 files changed, 66 insertions, 0 deletions

diff --git a/src/backends/tosaCommon/TosaMappings.cpp b/src/backends/tosaCommon/TosaMappings.cpp
new file mode 100644
index 0000000000..3c14bfd1f9
--- /dev/null
+++ b/src/backends/tosaCommon/TosaMappings.cpp
@@ -0,0 +1,66 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "TosaMappings.hpp"
+
+using namespace armnn;
+using namespace tosa;
+
+void SetBasicBlockConstantTensorData(Layer* layer, TosaSerializationBasicBlock* /*basicBlock*/)
+{
+    switch (layer->GetType())
+    {
+        case LayerType::Convolution2d:
+        {
+            // ToDo: using Convolution2d as an example as it has constant tensors for weights and bias.
+            // ToDo: manually set TosaOperator data of basicBlock where constant tensors exist.
+        }
+        default:
+            // If no switch statement for layer, no constant tensors exist in that layer, return
+            return;
+    }
+}
+
+TosaSerializationBasicBlock* GetTosaMapping(const LayerType type,
+                                            const std::vector<const TensorInfo*>& inputs,
+                                            const std::vector<const TensorInfo*>& outputs,
+                                            const BaseDescriptor& /*descriptor*/)
+{
+    switch (type)
+    {
+        case LayerType::Addition:
+        {
+            return ConvertAdditionToTosaOperator(inputs, outputs);
+        }
+        default:
+        {
+            // empty basic block when no tosa mapping implemented/exists
+            TosaSerializationOperator* op = new TosaSerializationOperator(Op_UNKNOWN, Attribute_NONE, nullptr, {}, {});
+            return new TosaSerializationBasicBlock("", {op}, {}, {}, {});
+        }
+    }
+}
+
+TosaSerializationBasicBlock* GetTosaMappingFromLayer(Layer* layer)
+{
+    std::vector<const TensorInfo*> inputs;
+    for (auto inputSlot : layer->GetInputSlots())
+    {
+        inputs.push_back(&inputSlot.GetConnection()->GetTensorInfo());
+    }
+
+    std::vector<const TensorInfo*> outputs;
+    for (auto& outputSlot : layer->GetOutputSlots())
+    {
+        outputs.push_back(&outputSlot.GetTensorInfo());
+    }
+
+    TosaSerializationBasicBlock* basicBlock = GetTosaMapping(layer->GetType(),
+                                                             inputs,
+                                                             outputs,
+                                                             layer->GetParameters());
+    SetBasicBlockConstantTensorData(layer, basicBlock);
+    return basicBlock;
+}