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#ifndef TIM_VX_OPS_BIDIRECTIONAL_SEQUENCE_RNN_H_
#define TIM_VX_OPS_BIDIRECTIONAL_SEQUENCE_RNN_H_
#include "tim/vx/builtin_op.h"

namespace tim {
namespace vx {
namespace ops {
    /**
     * ## bidirectional sequence rnn
     *  how to bind input/output: take bidirectional_sequence_rnn_test.cc
     */
    class BidirectionalSequenceRnn: public DirectMapOp {
     public:
      enum ActivationType {
        kNONE = 0,
        kRELU = 1,
        kRELU1 = 2,
        kRELU6 = 3,
        kTANH = 4,
        kSIGMOID = 6,
        kHARDSIGMOID = 31, /* temporary use 31 */
      };

      BidirectionalSequenceRnn(
          Graph* graph, 
          ActivationType act_type, 
          bool time_major = false,
          bool merge_outputs = false
      );

      std::shared_ptr<Operation> Clone(
          std::shared_ptr<Graph>& graph) const override;

     protected:
      ActivationType act_type_;
    };
}
}  // namespace vx
}  // namespace tim

#endif