Amesos2_Superlu_decl.hpp

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#ifndef AMESOS2_SUPERLU_DECL_HPP
#define AMESOS2_SUPERLU_DECL_HPP

#include "Amesos2_SolverTraits.hpp"
#include "Amesos2_SolverCore.hpp"
#include "Amesos2_Superlu_FunctionMap.hpp"


namespace Amesos2 {


template <class Matrix,
          class Vector>
class Superlu : public SolverCore<Amesos2::Superlu, Matrix, Vector>
{
  friend class SolverCore<Amesos2::Superlu,Matrix,Vector>; // Give our base access
                                                          // to our private
                                                          // implementation funcs
public:

  static const char* name;      // declaration. Initialization outside.

  typedef Superlu<Matrix,Vector>                                       type;
  typedef SolverCore<Amesos2::Superlu,Matrix,Vector>             super_type;

  // Since typedef's are not inheritted, go grab them
  typedef typename super_type::scalar_type                      scalar_type;
  typedef typename super_type::local_ordinal_type        local_ordinal_type;
  typedef typename super_type::global_ordinal_type      global_ordinal_type;
  typedef typename super_type::global_size_type            global_size_type;

  typedef TypeMap<Amesos2::Superlu,scalar_type>                    type_map;

  /*
   * The SuperLU interface will need two other typedef's, which are:
   * - the superlu type that corresponds to scalar_type and
   * - the corresponding type to use for magnitude
   */
  typedef typename type_map::type                                  slu_type;
  typedef typename type_map::magnitude_type                  magnitude_type;

  typedef FunctionMap<Amesos2::Superlu,slu_type>               function_map;



  Superlu(Teuchos::RCP<const Matrix> A,
          Teuchos::RCP<Vector>       X,
          Teuchos::RCP<const Vector> B);


  ~Superlu( );


private:

  int preOrdering_impl();


  int symbolicFactorization_impl();


  int numericFactorization_impl();


  int solve_impl(const Teuchos::Ptr<MultiVecAdapter<Vector> >       X,
                 const Teuchos::Ptr<const MultiVecAdapter<Vector> > B) const;


  bool matrixShapeOK_impl() const;


  void setParameters_impl(
    const Teuchos::RCP<Teuchos::ParameterList> & parameterList );


  Teuchos::RCP<const Teuchos::ParameterList> getValidParameters_impl() const;


  bool loadA_impl(EPhase current_phase);


  // struct holds all data necessary to make a superlu factorization or solve call
  mutable struct SLUData {
    SLU::SuperMatrix A, B, X, L, U; // matrix A in NCformat
    SLU::SuperMatrix AC;        // permuted matrix A in NCPformat

    SLU::superlu_options_t options;
    SLU::mem_usage_t mem_usage;
    SLU::SuperLUStat_t stat;

    Teuchos::Array<magnitude_type> berr; 
    Teuchos::Array<magnitude_type> ferr; 
    Teuchos::Array<int> perm_r;
    Teuchos::Array<int> perm_c;
    Teuchos::Array<int> etree;
    Teuchos::Array<magnitude_type> R;
    Teuchos::Array<magnitude_type> C;

    char equed;
    bool rowequ, colequ;        // flags what type of equilibration
                                // has been performed

    int relax;
    int panel_size;
  } data_;

  // The following Arrays are persisting storage arrays for A, X, and B
  Teuchos::Array<slu_type> nzvals_;
  Teuchos::Array<int> rowind_;
  Teuchos::Array<int> colptr_;

  Teuchos::Array<slu_type> xvals_;  int ldx_;
  Teuchos::Array<slu_type> bvals_;  int ldb_;

  /* Note: In the above, must use "Amesos2::Superlu" rather than
   * "Superlu" because otherwise the compiler references the
   * specialized type of the class, and not the templated type that is
   * required for Amesos2::TypeMap
   */

  /* SuperLU can accept input in either compressed-row or
   * compressed-column storage.  We will store and pass matrices in
   * *compressed-column* format.
   */

  /*
   * Internal flag that is used for the numericFactorization_impl
   * routine.  If true, then the superlu gstrf routine should have
   * SamePattern_SameRowPerm in its options.  Otherwise, it should
   * factor from scratch.
   *
   * This is somewhat of a kludge to get around the fact that the
   * superlu routines all expect something different from the options
   * struct.  The big issue is that we don't want gstrf doing the
   * symbolic factorization if it doesn't need to.  On the other hand,
   * we can't leave options.Fact set to SamePattern_SameRowPerm
   * because the solver driver needs it to be set at FACTORED.  But
   * having it set at FACTORED upon re-entrance into
   * numericFactorization prompts gstrf to redo the symbolic
   * factorization.
   */
  bool same_symbolic_;

};                              // End class Superlu


// Specialize solver_traits struct for SuperLU
template <>
struct solver_traits<Superlu> {
#ifdef HAVE_TEUCHOS_COMPLEX
  typedef Meta::make_list6<float,
                           double,
                           std::complex<float>,
                           std::complex<double>,
                           SLU::C::complex,
                           SLU::Z::doublecomplex> supported_scalars;
#else
  typedef Meta::make_list2<float, double> supported_scalars;
#endif
};

} // end namespace Amesos2

#endif  // AMESOS2_SUPERLU_DECL_HPP