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Grid/lib/qcd/action/fermion/WilsonFermion5D.h

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#ifndef GRID_QCD_WILSON_FERMION_5D_H
#define GRID_QCD_WILSON_FERMION_5D_H
namespace Grid {
namespace QCD {
////////////////////////////////////////////////////////////////////////////////
// This is the 4d red black case appropriate to support
//
// parity = (x+y+z+t)|2;
// generalised five dim fermions like mobius, zolotarev etc..
//
// i.e. even even contains fifth dim hopping term.
//
// [DIFFERS from original CPS red black implementation parity = (x+y+z+t+s)|2 ]
////////////////////////////
//ContFrac:
// Ls always odd. Rational poly deg is either Ls or Ls-1
//PartFrac
// Ls always odd. Rational poly deg is either Ls or Ls-1
//
//Cayley: Ls always even, Rational poly deg is Ls
//
// Just set nrational as Ls. Forget about Ls-1 cases.
//
// Require odd Ls for cont and part frac
////////////////////////////
////////////////////////////////////////////////////////////////////////////////
class WilsonFermion5D : public FermionOperator<LatticeFermion,LatticeGaugeField>
{
public:
///////////////////////////////////////////////////////////////
// Implement the abstract base
///////////////////////////////////////////////////////////////
GridBase *GaugeGrid(void) { return _FourDimGrid ;}
GridBase *GaugeRedBlackGrid(void) { return _FourDimRedBlackGrid ;}
GridBase *FermionGrid(void) { return _FiveDimGrid;}
GridBase *FermionRedBlackGrid(void) { return _FiveDimRedBlackGrid;}
// full checkerboard operations; leave unimplemented as abstract for now
virtual RealD M (const LatticeFermion &in, LatticeFermion &out){assert(0); return 0.0;};
virtual RealD Mdag (const LatticeFermion &in, LatticeFermion &out){assert(0); return 0.0;};
// half checkerboard operations; leave unimplemented as abstract for now
virtual void Meooe (const LatticeFermion &in, LatticeFermion &out){assert(0);};
virtual void MeooeDag (const LatticeFermion &in, LatticeFermion &out){assert(0);};
virtual void Mooee (const LatticeFermion &in, LatticeFermion &out){assert(0);};
virtual void MooeeDag (const LatticeFermion &in, LatticeFermion &out){assert(0);};
virtual void MooeeInv (const LatticeFermion &in, LatticeFermion &out){assert(0);};
virtual void MooeeInvDag (const LatticeFermion &in, LatticeFermion &out){assert(0);};
// Implement hopping term non-hermitian hopping term; half cb or both
// Implement s-diagonal DW
void DW (const LatticeFermion &in, LatticeFermion &out,int dag);
void Dhop (const LatticeFermion &in, LatticeFermion &out,int dag);
void DhopOE(const LatticeFermion &in, LatticeFermion &out,int dag);
void DhopEO(const LatticeFermion &in, LatticeFermion &out,int dag);
// add a DhopComm
// -- suboptimal interface will presently trigger multiple comms.
void DhopDir(const LatticeFermion &in, LatticeFermion &out,int dir,int disp);
///////////////////////////////////////////////////////////////
// New methods added
///////////////////////////////////////////////////////////////
void DhopInternal(CartesianStencil & st,
LebesgueOrder &lo,
LatticeDoubledGaugeField &U,
const LatticeFermion &in,
LatticeFermion &out,
int dag);
// Constructors
WilsonFermion5D(LatticeGaugeField &_Umu,
GridCartesian &FiveDimGrid,
GridRedBlackCartesian &FiveDimRedBlackGrid,
GridCartesian &FourDimGrid,
GridRedBlackCartesian &FourDimRedBlackGrid,
double _M5);
// DoubleStore
void DoubleStore(LatticeDoubledGaugeField &Uds,const LatticeGaugeField &Umu);
///////////////////////////////////////////////////////////////
// Data members require to support the functionality
///////////////////////////////////////////////////////////////
static int HandOptDslash; // these are a temporary hack
protected:
// Add these to the support from Wilson
GridBase *_FourDimGrid;
GridBase *_FourDimRedBlackGrid;
GridBase *_FiveDimGrid;
GridBase *_FiveDimRedBlackGrid;
static const int npoint=8;
static const std::vector<int> directions ;
static const std::vector<int> displacements;
double M5;
int Ls;
//Defines the stencils for even and odd
CartesianStencil Stencil;
CartesianStencil StencilEven;
CartesianStencil StencilOdd;
// Copy of the gauge field , with even and odd subsets
LatticeDoubledGaugeField Umu;
LatticeDoubledGaugeField UmuEven;
LatticeDoubledGaugeField UmuOdd;
LebesgueOrder Lebesgue;
LebesgueOrder LebesgueEvenOdd;
// Comms buffer
std::vector<vHalfSpinColourVector,alignedAllocator<vHalfSpinColourVector> > comm_buf;
};
}
}
#endif