eoprec_slic_linop_w.h

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// -*- C++ -*-
/*! \file
 *  \brief Even-odd preconditioned Clover fermion linear operator
 */
 
#ifndef __prec_slic_linop_w_h__
#define __prec_slic_linop_w_h__
 
#include "state.h"
#include "fermbc.h"
#include "actions/ferm/fermstates/stout_fermstate_w.h"
#include "actions/ferm/fermstates/simple_fermstate.h"
#include "eoprec_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 
{ 
  //! Even-odd preconditioned SLIC-Dirac operator
  /*!
   * \ingroup linop
   *
   * This routine is specific to Wilson fermions!
   *
   * The kernel for SLIC fermions is
   *
   *      M  =  A + (d+M) - (1/2) D'
   */
  class EvenOddPrecSLICLinOp : public EvenOddPrecLogDetLinearOperator<LatticeFermion, 
                                 multi1d<LatticeColorMatrix>, multi1d<LatticeColorMatrix> >
  {
  public:
    // Typedefs to save typing
    typedef LatticeFermion               T;
    typedef multi1d<LatticeColorMatrix>  P;
    typedef multi1d<LatticeColorMatrix>  Q;
 
    //! Partial constructor
    EvenOddPrecSLICLinOp() {}
 
    //! Full constructor
    EvenOddPrecSLICLinOp(Handle< FermState<T,P,Q> > fs,
                         const CloverFermActParams& param_);
 
    //! Destructor is automatic
    ~EvenOddPrecSLICLinOp() {}
 
    //! Return the fermion BC object for this linear operator
    const FermBC<T,P,Q>& getFermBC() const {return D_pl.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 evenEvenLinOp(LatticeFermion& chi, const LatticeFermion& psi, 
                       enum PlusMinus isign) const;
 
    //! Apply the inverse of the even-even block onto a source std::vector
    void evenEvenInvLinOp(LatticeFermion& chi, const LatticeFermion& psi, 
                          enum PlusMinus isign) const;
  
    //! Apply the the even-odd block onto a source std::vector
    void evenOddLinOp(LatticeFermion& chi, const LatticeFermion& psi, 
                      enum PlusMinus isign) const;
 
    //! Apply the the odd-even block onto a source std::vector
    void oddEvenLinOp(LatticeFermion& chi, const LatticeFermion& psi, 
                      enum PlusMinus isign) const;
 
    //! Apply the the odd-odd block onto a source std::vector
    void oddOddLinOp(LatticeFermion& chi, const LatticeFermion& psi, 
                     enum PlusMinus isign) const;
 
    // Override inherited one with a few more funkies
    void operator()(LatticeFermion& chi, const LatticeFermion& psi, 
                    enum PlusMinus isign) const;
 
    //! Apply the even-even block onto a source std::vector
    void derivEvenEvenLinOp(multi1d<LatticeColorMatrix>& ds_u, 
                            const LatticeFermion& chi, const LatticeFermion& psi, 
                            enum PlusMinus isign) const;
 
    void derivLogDetEvenEvenLinOp(multi1d<LatticeColorMatrix>& ds_u, 
                                  enum PlusMinus isign) const;
 
    //! Apply the the even-odd block onto a source std::vector
    void derivEvenOddLinOp(multi1d<LatticeColorMatrix>& ds_u, 
                           const LatticeFermion& chi, const LatticeFermion& psi, 
                           enum PlusMinus isign) const;
 
    //! Apply the the odd-even block onto a source std::vector
    void derivOddEvenLinOp(multi1d<LatticeColorMatrix>& ds_u, 
                           const LatticeFermion& chi, const LatticeFermion& psi, 
                           enum PlusMinus isign) const;
 
    //! Apply the the odd-odd block onto a source std::vector
    void derivOddOddLinOp(multi1d<LatticeColorMatrix>& ds_u, 
                          const LatticeFermion& chi, const LatticeFermion& psi, 
                          enum PlusMinus isign) const;
 
    //! Return flops performed by the operator()
    unsigned long nFlops() const;
 
    //! Get the log det of the even even part
    Double logDetEvenEvenLinOp(void) const ; 
 
  private:
    Handle< FermState<T,P,Q> > slic_fs;
    Handle< FermState<T,P,Q> > fs_pl;
    Handle< FermState<T,P,Q> > fs_mn;
    CloverFermActParams param;
    WilsonDslash D_pl;
    WilsonDslash D_mn;
    CloverTerm   clov;
    CloverTerm   invclov;  // uggh, only needed for evenEvenLinOp
  };
 
} // End Namespace Chroma
 
 
#endif