asolver_BiCGStab_Precond.h

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#ifndef ASOLVER_BICGSTAB_PRECOND_H
#define ASOLVER_BICGSTAB_PRECOND_H
 
#include <cstdio>
#include <cstdlib>
#include <vector>
using std::vector;
#include <string>
using std::string;
 
#include "lib_alt/Solver/asolver.h"
#include "lib/Fopr/afopr.h"
#include "lib_alt/Solver/aprecond.h"
 
template<typename AFIELD>
class ASolver_BiCGStab_Precond : public ASolver<AFIELD>
{
 public:
  typedef typename AFIELD::real_t real_t;
  using ASolver<AFIELD>::m_vl;
  static const std::string class_name;
 
 private:
 
  AFopr<AFIELD> *m_fopr;    
  APrecond<AFIELD> *m_prec; 
 
  int m_Niter;              
  real_t m_Stop_cond;       
  real_t m_Stop_cond2;      
 
  AFIELD m_x, m_r, m_p, m_s, m_rh, m_v, m_t, m_u;
  real_t m_rho_prev, m_alpha_prev, m_omega_prev;
 
 protected:
 
  int m_nconv;
 
  ASolver_BiCGStab_Precond() { }
 
 public:
  ASolver_BiCGStab_Precond(AFopr<AFIELD> *fopr,
                           APrecond<AFIELD> *prec)
    : m_Niter(0), m_Stop_cond(0.0L)
  {
    m_fopr = fopr;
    m_prec = prec;
    init();
  }
 
  ~ASolver_BiCGStab_Precond() { tidyup(); }
 
  void set_parameters(const Parameters& params);
 
  void set_parameters(const int Niter, const real_t Stop_cond);
 
  void solve(AFIELD& xq, const AFIELD& b, int& nconv, real_t& diff);
 
  AFopr<AFIELD> *get_afopr() { return m_fopr; }
 
  double flop_count();
 
 protected:
 
  void init(void);
 
  void tidyup(void);
 
  void solve_init(const AFIELD& b, real_t& rr);
 
  void solve_step(real_t& rr);
 
  void prec(AFIELD&, AFIELD&);
};
 
#endif // ASOLVER_BICGSTAB_PRECOND_H