asolver_CG.h

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#ifndef ASOLVER_CG_H
#define ASOLVER_CG_H
 
#include <cstdio>
#include <cstdlib>
#include <vector>
using std::vector;
#include <string>
using std::string;
 
#include "lib/Fopr/afopr.h"
 
#include "lib_alt/Solver/asolver.h"
 
template<typename AFIELD>
class ASolver_CG : public ASolver<AFIELD>
{
 public:
  typedef typename AFIELD::real_t real_t;
  using ASolver<AFIELD>::m_vl;
  static const std::string class_name;
  using InitialGuess = typename ASolver<AFIELD>::InitialGuess;
 
 protected:
 
  AFopr<AFIELD> *m_fopr; 
 
  int m_Niter;           
  real_t m_Stop_cond;    
 
  int m_nconv;
 
  InitialGuess m_initial_mode;
 
  ASolver_CG() { }
 
  AFIELD m_x, m_r, m_p, m_s;
 
 public:
  ASolver_CG(AFopr<AFIELD> *fopr)
    : m_Niter(0), m_Stop_cond(0.0L)
  {
    m_fopr = fopr;
    this->init();
  }
 
  ~ASolver_CG() { this->tidyup(); }
 
  void set_parameters(const Parameters& params);
 
  void set_parameters(const int Niter, const real_t Stop_cond);
 
  void set_parameters(const int Niter, const real_t Stop_cond, const InitialGuess init_guess_mode);
 
  void set_init_mode(const InitialGuess init_guess)
  {
    m_initial_mode = init_guess;
  }
 
  void solve(AFIELD& xq, const AFIELD& b, int& nconv, real_t& diff);
 
  AFopr<AFIELD> *get_fopr() { return m_fopr; }
 
  double flop_count();
 
 
 protected:
 
  void init(void);
 
  void tidyup(void);
 
  void solve_CG_init(real_t& rrp, real_t& rr);
 
  void solve_CG_step(real_t& rrp, real_t& rr);
 
 
#ifdef USE_FACTORY
 private:
  static ASolver<AFIELD> *create_object_with_fopr(AFopr<AFIELD> *fopr)
  { return new ASolver_CG<AFIELD>(fopr); }
 
 public:
  static bool register_factory()
  {
    bool init = ASolver<AFIELD>::Factory_fopr::Register("CG",
                                                        create_object_with_fopr);
    return init;
  }
#endif
};
 
#endif // ASOLVER_CG_H