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  #include "core/matrix/fft_kernels.hpp"
  
  
  #include <ginkgo/core/base/exception_helpers.hpp>
  #include <ginkgo/core/base/math.hpp>
  #include <ginkgo/core/matrix/dense.hpp>
  
  
  namespace gko {
  namespace kernels {
  namespace dpcpp {
  /**
   * @brief The FFT matrix format namespace.
   * @ref Fft
   * @ingroup fft
   */
  namespace fft {
  
  
  template <typename ValueType>
  void fft(std::shared_ptr<const DefaultExecutor> exec,
           const matrix::Dense<std::complex<ValueType>>* b,
           matrix::Dense<std::complex<ValueType>>* x, bool inverse,
           Array<char>& buffer) GKO_NOT_IMPLEMENTED;
  
  GKO_INSTANTIATE_FOR_EACH_NON_COMPLEX_VALUE_TYPE(GKO_DECLARE_FFT_KERNEL);
  
  
  template <typename ValueType>
  void fft2(std::shared_ptr<const DefaultExecutor> exec,
            const matrix::Dense<std::complex<ValueType>>* b,
            matrix::Dense<std::complex<ValueType>>* x, size_type size1,
            size_type size2, bool inverse,
            Array<char>& buffer) GKO_NOT_IMPLEMENTED;
  
  GKO_INSTANTIATE_FOR_EACH_NON_COMPLEX_VALUE_TYPE(GKO_DECLARE_FFT2_KERNEL);
  
  
  template <typename ValueType>
  void fft3(std::shared_ptr<const DefaultExecutor> exec,
            const matrix::Dense<std::complex<ValueType>>* b,
            matrix::Dense<std::complex<ValueType>>* x, size_type size1,
            size_type size2, size_type size3, bool inverse,
            Array<char>& buffer) GKO_NOT_IMPLEMENTED;
  
  GKO_INSTANTIATE_FOR_EACH_NON_COMPLEX_VALUE_TYPE(GKO_DECLARE_FFT3_KERNEL);
  
  
  }  // namespace fft
  }  // namespace dpcpp
  }  // namespace kernels
  }  // namespace gko
  