Intrepid2_HGRAD_HEX_Cn_FEM.hpp

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#ifndef __INTREPID2_HGRAD_HEX_CN_FEM_HPP__
#define __INTREPID2_HGRAD_HEX_CN_FEM_HPP__

#include "Intrepid2_Basis.hpp"
#include "Intrepid2_HGRAD_LINE_Cn_FEM.hpp"

namespace Intrepid2 {

  namespace Impl {
    class Basis_HGRAD_HEX_Cn_FEM {
    public:
      typedef struct Hexahedron<8> cell_topology_type;
      template<EOperator opType>
      struct Serial {
        template<typename outputValueViewType,
                 typename inputPointViewType,
                 typename workViewType,
                 typename vinvViewType>
        KOKKOS_INLINE_FUNCTION
        static void
        getValues(       outputValueViewType outputValues,
                   const inputPointViewType  inputPoints,
                         workViewType        work,
                   const vinvViewType        vinv,
                   const ordinal_type        operatorDn = 0 );
      };

      template<typename ExecSpaceType, ordinal_type numPtsPerEval,
               typename outputValueValueType, class ...outputValueProperties,
               typename inputPointValueType,  class ...inputPointProperties,
               typename vinvValueType,        class ...vinvProperties>
      static void
      getValues(        Kokkos::DynRankView<outputValueValueType,outputValueProperties...> outputValues,
                  const Kokkos::DynRankView<inputPointValueType, inputPointProperties...>  inputPoints,
                  const Kokkos::DynRankView<vinvValueType,       vinvProperties...>        vinv,
                  const EOperator operatorType );

      template<typename outputValueViewType,
               typename inputPointViewType,
               typename vinvViewType,
               typename workViewType,
               EOperator opType,
               ordinal_type numPtsEval>
      struct Functor {
              outputValueViewType _outputValues;
        const inputPointViewType  _inputPoints;
        const vinvViewType        _vinv;
              workViewType        _work;
        const ordinal_type        _opDn;

        KOKKOS_INLINE_FUNCTION
        Functor(       outputValueViewType outputValues_,
                       inputPointViewType  inputPoints_,
                       vinvViewType        vinv_,
                       workViewType        work_,
                 const ordinal_type        opDn_ = 0 )
          : _outputValues(outputValues_), _inputPoints(inputPoints_), 
            _vinv(vinv_), _work(work_), _opDn(opDn_) {}
        
        KOKKOS_INLINE_FUNCTION
        void operator()(const size_type iter) const {
          const auto ptBegin = Util<ordinal_type>::min(iter*numPtsEval,    _inputPoints.extent(0));
          const auto ptEnd   = Util<ordinal_type>::min(ptBegin+numPtsEval, _inputPoints.extent(0));

          const auto ptRange = Kokkos::pair<ordinal_type,ordinal_type>(ptBegin, ptEnd);
          const auto input   = Kokkos::subview( _inputPoints, ptRange, Kokkos::ALL() );

          typename workViewType::pointer_type ptr = _work.data() + _work.extent(0)*ptBegin*get_dimension_scalar(_work);

          auto vcprop = Kokkos::common_view_alloc_prop(_work);
          workViewType  work(Kokkos::view_wrap(ptr,vcprop), (ptEnd-ptBegin)*_work.extent(0));

          switch (opType) {
          case OPERATOR_VALUE : {
            auto output = Kokkos::subview( _outputValues, Kokkos::ALL(), ptRange );
            Serial<opType>::getValues( output, input, work, _vinv );
            break;
          }
          case OPERATOR_CURL :
          case OPERATOR_Dn : {
            auto output = Kokkos::subview( _outputValues, Kokkos::ALL(), ptRange, Kokkos::ALL() );
            Serial<opType>::getValues( output, input, work, _vinv, _opDn );
            break;
          }
          default: {
            INTREPID2_TEST_FOR_ABORT( true,
                                      ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::Functor) operator is not supported");

          }
          }
        }
      };
    };
  }
  
  template<typename ExecSpaceType = void,
           typename outputValueType = double,
           typename pointValueType = double>
  class Basis_HGRAD_HEX_Cn_FEM
    : public Basis<ExecSpaceType,outputValueType,pointValueType> {
  public:
    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::ordinal_type_array_1d_host ordinal_type_array_1d_host;
    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::ordinal_type_array_2d_host ordinal_type_array_2d_host;
    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::ordinal_type_array_3d_host ordinal_type_array_3d_host;

    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::outputViewType outputViewType;
    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::pointViewType  pointViewType;
    typedef typename Basis<ExecSpaceType,outputValueType,pointValueType>::scalarViewType  scalarViewType;

  private:
    Kokkos::DynRankView<typename scalarViewType::value_type,ExecSpaceType> vinv_;

  public:

    Basis_HGRAD_HEX_Cn_FEM(const ordinal_type order,
                            const EPointType   pointType = POINTTYPE_EQUISPACED);

    using Basis<ExecSpaceType,outputValueType,pointValueType>::getValues;

    virtual
    void
    getValues(       outputViewType outputValues,
               const pointViewType  inputPoints,
               const EOperator operatorType = OPERATOR_VALUE ) const {
#ifdef HAVE_INTREPID2_DEBUG
      Intrepid2::getValues_HGRAD_Args(outputValues,
                                      inputPoints,
                                      operatorType,
                                      this->getBaseCellTopology(),
                                      this->getCardinality() );
#endif
      constexpr ordinal_type numPtsPerEval = Parameters::MaxNumPtsPerBasisEval;
      Impl::Basis_HGRAD_HEX_Cn_FEM::
        getValues<ExecSpaceType,numPtsPerEval>( outputValues,
                                                inputPoints,
                                                this->vinv_,
                                                operatorType );
    }


    virtual
    void
    getDofCoords( scalarViewType dofCoords ) const {
#ifdef HAVE_INTREPID2_DEBUG
      // Verify rank of output array.
      INTREPID2_TEST_FOR_EXCEPTION( dofCoords.rank() != 2, std::invalid_argument,
                                    ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::getDofCoords) rank = 2 required for dofCoords array");
      // Verify 0th dimension of output array.
      INTREPID2_TEST_FOR_EXCEPTION( static_cast<ordinal_type>(dofCoords.extent(0)) != this->getCardinality(), std::invalid_argument,
                                    ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::getDofCoords) mismatch in number of dof and 0th dimension of dofCoords array");
      // Verify 1st dimension of output array.
      INTREPID2_TEST_FOR_EXCEPTION( dofCoords.extent(1) != this->getBaseCellTopology().getDimension(), std::invalid_argument,
                                    ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::getDofCoords) incorrect reference cell (1st) dimension in dofCoords array");
#endif
      Kokkos::deep_copy(dofCoords, this->dofCoords_);
    }

    virtual
    void
    getDofCoeffs( scalarViewType dofCoeffs ) const {
#ifdef HAVE_INTREPID2_DEBUG
      // Verify rank of output array.
      INTREPID2_TEST_FOR_EXCEPTION( dofCoeffs.rank() != 1, std::invalid_argument,
                                    ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::getdofCoeffs) rank = 1 required for dofCoeffs array");
      // Verify 0th dimension of output array.
      INTREPID2_TEST_FOR_EXCEPTION( static_cast<ordinal_type>(dofCoeffs.extent(0)) != this->getCardinality(), std::invalid_argument,
                                    ">>> ERROR: (Intrepid2::Basis_HGRAD_HEX_Cn_FEM::getdofCoeffs) mismatch in number of dof and 0th dimension of dofCoeffs array");
#endif
      Kokkos::deep_copy(dofCoeffs, 1.0);
    }

    virtual
    const char*
    getName() const {
      return "Intrepid2_HGRAD_HEX_Cn_FEM";
    }

    virtual
    bool
    requireOrientation() const {
      return (this->basisDegree_ > 2);
    }

    Kokkos::DynRankView<typename scalarViewType::const_value_type,ExecSpaceType>
    getVandermondeInverse() {
      return vinv_;
    }

    ordinal_type
    getWorkSizePerPoint(const EOperator operatorType) {
      return 4*getPnCardinality<1>(this->basisDegree_); 
    }

  };

}// namespace Intrepid2

#include "Intrepid2_HGRAD_HEX_Cn_FEMDef.hpp"

#endif