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, 23 insertions, 12 deletions

diff --git a/src/backends/tosaReference/TosaRefLayerSupport.cpp b/src/backends/tosaReference/TosaRefLayerSupport.cpp
index 18530bb535..f5f34a814b 100644
--- a/src/backends/tosaReference/TosaRefLayerSupport.cpp
+++ b/src/backends/tosaReference/TosaRefLayerSupport.cpp
@@ -95,25 +95,36 @@ bool TosaRefLayerSupport::IsLayerSupported(const LayerType& type,
     IgnoreUnused(lstmParamsInfo);
     IgnoreUnused(quantizedLstmInputParamsInfo);
 
-    // Setup Inputs
-    const auto input0      = infos[0];
-    const TensorInfo* ptr0 = &input0;
-    const auto input1      = infos[1];
-    const TensorInfo* ptr1 = &input1;
-    std::vector<const TensorInfo*> inputInfos = {ptr0, ptr1};
-
-    // Setup Outputs
-    const auto output      = infos[2];
-    const TensorInfo* ptr2 = &output;
-    std::vector<const TensorInfo*> outputInfos = {ptr2};
+    std::vector<const TensorInfo*> inputInfos;
+    std::vector<const TensorInfo*> outputInfos;
+
+    switch (type)
+    {
+        case LayerType::Addition:
+            // Setup inputs and outputs
+            inputInfos.push_back(&infos[0]);
+            inputInfos.push_back(&infos[1]);
+            outputInfos.push_back(&infos[2]);
+            break;
+        case LayerType::Input:
+        case LayerType::Output:
+            return true;
+        default:
+            break;
+    }
 
     auto mappings = GetTosaMapping(type, inputInfos, outputInfos, descriptor);
+    if (mappings->GetName() == "")
+    {
+        // There currently isn't a TOSA mapping for this layer, as the default was returned.
+        return false;
+    }
 
     // Loop through block and get each tensor and operator
     for (long unsigned int i = 0; i < mappings->GetOperators().size(); ++i)
     {
         // While looping over operators check for op_UNKNOWN which is unsupported
-        if (mappings->GetOperators()[i]->GetOp() == tosa::Op_UNKNOWN) { return false;}
+        if (mappings->GetOperators()[i]->GetOp() == tosa::Op_UNKNOWN) { return false; }
 
         // Loop over operators and get GetInput/OutputTensorNames, loop over resulting names and
         // use GetTensorByName to pass pointers to tensors on to the IsTosaLayerSupported()