unprec_hamberwu_fermact_w.cc

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/*! \file
 *  \brief Unpreconditioned Hamber-Wu fermion action
 */
 
#include "chromabase.h"
#include "actions/ferm/fermacts/unprec_hamberwu_fermact_w.h"
#include "actions/ferm/linop/unprec_hamberwu_linop_w.h"
 
#include "actions/ferm/fermacts/fermact_factory_w.h"
#include "actions/ferm/fermstates/ferm_createstate_reader_w.h"
 
#include "io/param_io.h"
 
namespace Chroma
{
 
  //! Hooks to register the class with the fermact factory
  namespace UnprecHamberWuFermActEnv
  {
    //! Callback function
    WilsonTypeFermAct<LatticeFermion,
                      multi1d<LatticeColorMatrix>,
                      multi1d<LatticeColorMatrix> >* createFermAct4D(XMLReader& xml_in,
                                                                     const std::string& path)
    {
      return new UnprecHamberWuFermAct(CreateFermStateEnv::reader(xml_in, path), 
                                       UnprecHamberWuFermActParams(xml_in, path));
    }
 
    //! Callback function
    /*! Differs in return type */
    FermionAction<LatticeFermion,
                  multi1d<LatticeColorMatrix>,
                  multi1d<LatticeColorMatrix> >* createFermAct(XMLReader& xml_in,
                                                               const std::string& path)
    {
      return createFermAct4D(xml_in, path);
    }
 
    //! Name to be used
    const std::string name = "UNPRECONDITIONED_HAMBER-WU";
 
    //! Local registration flag
    static bool registered = false;
 
    //! Register all the factories
    bool registerAll() 
    {
      bool success = true; 
      if (! registered)
      {
        success &= Chroma::TheFermionActionFactory::Instance().registerObject(name, createFermAct);
        success &= Chroma::TheWilsonTypeFermActFactory::Instance().registerObject(name, createFermAct4D);
        registered = true;
      }
      return success;
    }
  }
 
 
  //! Read parameters
  UnprecHamberWuFermActParams::UnprecHamberWuFermActParams(XMLReader& xml, const std::string& path)
  {
    XMLReader paramtop(xml, path);
 
    // Read the stuff for the action
    if (paramtop.count("Mass") != 0) 
    {
      read(paramtop, "Mass", Mass);
      if (paramtop.count("Kappa") != 0) 
      {
        QDPIO::cerr << "Error: found both a Kappa and a Mass tag" << std::endl;
        QDP_abort(1);
      }
    }
    else if (paramtop.count("Kappa") != 0)
    {
      Real Kappa;
      read(paramtop, "Kappa", Kappa);
      Mass = kappaToMass(Kappa);    // Convert Kappa to Mass
    }
    else
    {
      QDPIO::cerr << "Error: neither Mass or Kappa found" << std::endl;
      QDP_abort(1);
    }
 
    read(paramtop, "u0", u0);
 
    //  Read optional aniso
    if (paramtop.count("AnisoParam") != 0) 
      read(paramtop, "AnisoParam", anisoParam);
  }
 
 
  //! Read parameters
  void read(XMLReader& xml, const std::string& path, UnprecHamberWuFermActParams& param)
  {
    UnprecHamberWuFermActParams tmp(xml, path);
    param = tmp;
  }
 
 
 
  //! Produce a linear operator for this action
  /*!
   * The operator acts on the entire lattice
   *
   * \param state           gauge field                (Read)
   */
  UnprecLinearOperator<LatticeFermion,
                       multi1d<LatticeColorMatrix>,
                       multi1d<LatticeColorMatrix> >*
  UnprecHamberWuFermAct::linOp(Handle< FermState<T,P,Q> > state) const
  {
    if (param.anisoParam.anisoP)
    {
      QDPIO::cerr << "UnprecHamberWuFermAct::linOp - currently no aniso support" << std::endl;
      QDP_abort(1);
    }
 
    return new UnprecHamberWuLinOp(state, param.Mass, param.u0); 
  }
 
}