ParseSwish.cxx

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#include "TMVA/RModelParser_ONNX.hxx"
#include "TMVA/ROperator_Swish.hxx"
#include "onnx_proto3.pb.h"
 
namespace TMVA {
namespace Experimental {
namespace SOFIE {
 
ParserFuncSignature ParseSwish = [](RModelParser_ONNX &parser, const onnx::NodeProto &nodeproto) {
   ETensorType input_type;
 
   auto input_name = nodeproto.input(0);
   if (parser.IsRegisteredTensorType(input_name)) {
      input_type = parser.GetTensorType(input_name);
   } else {
      throw std::runtime_error("TMVA::SOFIE ONNX Parser Swish op has input tensor" + input_name +
                               " but its type is not yet registered");
   }
 
   std::unique_ptr<ROperator> op;
 
   // alpha attribute for Swish
   float attr_alpha = 1;
 
   for (int_t i = 0; i < nodeproto.attribute_size(); i++) {
      std::string attribute_name = nodeproto.attribute(i).name();
      if (attribute_name == "alpha")
         attr_alpha = nodeproto.attribute(i).f();
   }
   // ROperator_Swish implements alpha = 1 (x * sigmoid(x)); reject other values
   if (attr_alpha != 1.0) {
      throw std::runtime_error("TMVA::SOFIE - Unsupported - Operator Swish does not yet support alpha != 1");
   }
 
   std::string output_name = nodeproto.output(0);
 
   op.reset(new ROperator_Swish(input_name, output_name));
 
   if (!parser.IsRegisteredTensorType(output_name)) {
      parser.RegisterTensorType(output_name, input_type);
   }
 
   return op;
};
 
} // namespace SOFIE
} // namespace Experimental
} // namespace TMVA