Grid/lib/qcd/action/fermion/MobiusZolotarevFermion.h

/*************************************************************************************

    Grid physics library, www.github.com/paboyle/Grid 

    Source file: ./lib/qcd/action/fermion/MobiusZolotarevFermion.h

    Copyright (C) 2015

Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/*  END LEGAL */
#ifndef  GRID_QCD_MOBIUS_ZOLOTAREV_FERMION_H
#define  GRID_QCD_MOBIUS_ZOLOTAREV_FERMION_H

#include <Grid/qcd/action/fermion/FermionCore.h>

NAMESPACE_BEGIN(Grid);

template<class Impl>
class MobiusZolotarevFermion : public CayleyFermion5D<Impl>
{
public:
  INHERIT_IMPL_TYPES(Impl);
public:

  virtual void   Instantiatable(void) {};
  // Constructors
  MobiusZolotarevFermion(GaugeField &_Umu,
			 GridCartesian         &FiveDimGrid,
			 GridRedBlackCartesian &FiveDimRedBlackGrid,
			 GridCartesian         &FourDimGrid,
			 GridRedBlackCartesian &FourDimRedBlackGrid,
			 RealD _mass,RealD _M5,
			 RealD b, RealD c,
			 RealD lo, RealD hi,const ImplParams &p= ImplParams()) : 
      
    CayleyFermion5D<Impl>(_Umu,
			  FiveDimGrid,
			  FiveDimRedBlackGrid,
			  FourDimGrid,
			  FourDimRedBlackGrid,_mass,_M5,p)

  {
    RealD eps = lo/hi;

    Approx::zolotarev_data *zdata = Approx::zolotarev(eps,this->Ls,0);
    assert(zdata->n==this->Ls);

    std::cout<<GridLogMessage << "MobiusZolotarevFermion (b="<<b<<",c="<<c<<") with Ls= "<<this->Ls<<" Zolotarev range ["<<lo<<","<<hi<<"]"<<std::endl;
	
    // Call base setter
    this->SetCoefficientsZolotarev(hi,zdata,b,c);
 
    Approx::zolotarev_free(zdata);
  }

};

NAMESPACE_END(Grid);

#endif