seoprec_clover_linop_w.h

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// -*- C++ -*-
/*! \file
 *  \brief Symmetric even-odd preconditioned Clover fermion linear operator
 */
 
#ifndef __seoprec_clover_linop_w_h__
#define __seoprec_clover_linop_w_h__
 
#include "state.h"
#include "fermbc.h"
#include "seoprec_logdet_linop.h"
#include "actions/ferm/fermacts/clover_fermact_params_w.h"
#include "actions/ferm/linop/dslash_w.h"
#include "actions/ferm/linop/clover_term_w.h"
 
 
namespace Chroma 
{ 
  //! Symmetric even-odd preconditioned Clover-Dirac operator
  /*!
   * \ingroup linop
   *
   * This routine is specific to Wilson fermions!
   *
   * The kernel for Clover fermions is
   *
   *      M  =  A + (d+M) - (1/2) D'
   */
  class SymEvenOddPrecCloverLinOp : public SymEvenOddPrecLogDetLinearOperator<LatticeFermion, 
                                                                              multi1d<LatticeColorMatrix>, multi1d<LatticeColorMatrix> >
  {
  public:
    // Typedefs to save typing
    typedef LatticeFermion               T;
    typedef multi1d<LatticeColorMatrix>  P;
    typedef multi1d<LatticeColorMatrix>  Q;
 
    //! Partial constructor
    SymEvenOddPrecCloverLinOp() {}
 
    //! Full constructor
    SymEvenOddPrecCloverLinOp(Handle< FermState<T,P,Q> > fs,
                              const CloverFermActParams& param_)
    {
      create(fs,param_);
    }
 
    //! Destructor is automatic
    ~SymEvenOddPrecCloverLinOp() {
    }
 
    //! Return the fermion BC object for this linear operator
    const FermBC<T,P,Q>& getFermBC() const {return D.getFermBC();}
 
    //! Creation routine
    void create(Handle< FermState<T,P,Q> > fs,
                const CloverFermActParams& param_);
 
    //! Apply the the even-even block onto a source std::vector
    void unprecEvenEvenLinOp(T& chi, const T& psi,
                       enum PlusMinus isign) const;
 
    //! Apply the inverse of the even-even block onto a source std::vector
    void unprecEvenEvenInvLinOp(T& chi, const T& psi,
                          enum PlusMinus isign) const;
  
    //! Apply the the odd-odd block onto a source std::vector
     void unprecOddOddLinOp(T& chi, const T& psi,
                     enum PlusMinus isign) const;
 
     //! Apply the inverse of the odd-odd block onto a source std::vector
     void unprecOddOddInvLinOp(T& chi, const T& psi,
                        enum PlusMinus isign) const;
 
    //! Apply the the even-odd block onto a source std::vector
    void unprecEvenOddLinOp(T& chi, const T& psi,
                      enum PlusMinus isign) const ;
 
    //! Apply the the odd-even block onto a source std::vector
    void unprecOddEvenLinOp(T& chi, const T& psi,
                      enum PlusMinus isign) const ;
 
 
 
    // Deriv of A_ee
    virtual void derivUnprecEvenEvenLinOp(P& ds_u, const T& chi, const T& psi,
                enum PlusMinus isign) const;
 
    // Deriv of A_oo
    virtual void derivUnprecOddOddLinOp(P& ds_u, const T& chi, const T& psi,
                enum PlusMinus isign) const;
 
    // Deriv of  D_eo
    virtual void derivUnprecEvenOddLinOp(P& ds_u, const T& chi, const T& psi,
                enum PlusMinus isign) const;
 
    // Deriv of  D_oe
    virtual void derivUnprecOddEvenLinOp(P& ds_u, const T& chi, const T& psi,
                enum PlusMinus isign) const;
  
    //! Apply the even-even block onto a source std::vector
    void derivLogDetEvenEvenLinOp(P& ds_u,
                                  enum PlusMinus isign) const;
 
    //! Apply the odd-odd block onto a source std::vector
    void derivLogDetOddOddLinOp(P& ds_u,
                                enum PlusMinus isign) const;
 
    // Override inherited one with a few more funkies
    //
    // Optimized operator() work on it when the category default works.
    void operator()(T& chi, const T& psi,
                enum PlusMinus isign) const override;
 
    void deriv(P& ds_u, const T& chi, const T& psi,
                enum PlusMinus isign) const override;
 
 
        //! Deriv
        void derivMultipole(P& ds_u, const multi1d<T>& chi,
                        const multi1d<T>& psi,
                        enum PlusMinus isign) const override;
 
    //! Return flops performed by the operator()
    unsigned long nFlops() const;
 
    //! Get the log det of the even even part
    Double logDetEvenEvenLinOp(void) const; 
 
    //! Get the log det of the odd odd part
    Double logDetOddOddLinOp(void) const; 
 
  private:
    CloverFermActParams param;
    WilsonDslash D;
    CloverTerm   clov;
    CloverTerm   invclov;  // needed for even-even and odd-odd
    mutable double clov_apply_time;
    mutable double clov_deriv_time;
    mutable StopWatch swatch;
  };
 
 
 
} // End Namespace Chroma
 
 
#endif