fopr_Rational_SF.h

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#ifndef FOPR_RATIONAL_SF_INCLUDED
#define FOPR_RATIONAL_SF_INCLUDED
 
#include "fopr_Rational.h"
 
#include "Field/field_SF.h"
#include "Solver/shiftsolver_CG.h"
 
#include "IO/bridgeIO.h"
using Bridge::vout;
 
 
class Fopr_Rational_SF : public Fopr
{
 public:
  static const std::string class_name;
 
 private:
  Bridge::VerboseLevel m_vl;
 
  int m_Np;                 // number of poles in rational approx.
  int m_n_exp, m_d_exp;     // numerator and denominator of the exponent
  double m_x_min, m_x_max;  // valid range of approximate sign function
  int m_Niter;              // max iteration of shiftsolver
  double m_Stop_cond;       // stopping condition of shift solver
 
  Fopr *m_fopr;
  Shiftsolver_CG *m_solver;
 
  double m_a0;
  std::vector<double> m_cl;
  std::vector<double> m_bl;
  std::vector<Field> m_xq;
 
 public:
 
  Fopr_Rational_SF(Fopr *fopr)
    : m_vl(CommonParameters::Vlevel()), m_fopr(fopr) {}
 
  Fopr_Rational_SF(Fopr *fopr, const Parameters& params)
    : m_vl(CommonParameters::Vlevel()), m_fopr(fopr)
  {
    set_parameters(params);
  }
 
  ~Fopr_Rational_SF()
  {
    delete m_solver;
  }
 
  void set_parameters(const Parameters& params);
  void set_parameters(const int Np, const int n_exp, const int d_exp, const double x_min, const double x_max,
                      const int Niter, const double Stop_cond);
 
  void get_parameters(Parameters& params) const;
 
  void set_config(Field *U)
  {
    m_fopr->set_config(U);
  }
 
  void mult(Field& v, const Field& f);
 
  void mult_dag(Field& v, const Field& f)
  {
    mult(v, f);
  }
 
  double func(const double x);
 
  int field_nvol() { return m_fopr->field_nvol(); }
  int field_nin() { return m_fopr->field_nin(); }
  int field_nex() { return m_fopr->field_nex(); }
 
  double flop_count();
 
 private:
  void init_parameters();
 
#ifdef USE_FACTORY
 private:
  static Fopr *create_object(Fopr *fopr)
  {
    return new Fopr_Rational_SF(fopr);
  }
 
  static Fopr *create_object_with_params(Fopr *fopr, const Parameters& params)
  {
    return new Fopr_Rational_SF(fopr, params);
  }
 
 public:
  static bool register_factory()
  {
    bool init = true;
    init &= Fopr::Factory_fopr::Register("Rational_SF", create_object);
    init &= Fopr::Factory_fopr_params::Register("Rational_SF", create_object_with_params);
    return init;
  }
#endif
};
#endif