Panzer_SubcellConnectivity.hpp

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//           Panzer: A partial differential equation assembly
//       engine for strongly coupled complex multiphysics systems
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#ifndef PANZER_SUBCELL_CONNECTIVITY_HPP
#define PANZER_SUBCELL_CONNECTIVITY_HPP

#include "PanzerCore_config.hpp"
#include "Phalanx_KokkosDeviceTypes.hpp"
#include "Teuchos_Assert.hpp"

namespace panzer {

struct LocalMeshPartition;

class SubcellConnectivity
{
public:

  SubcellConnectivity() = default;

  ~SubcellConnectivity() = default;

  KOKKOS_INLINE_FUNCTION
  int numSubcells() const {return _subcell_to_cells_adj.extent(0)-1;}

  KOKKOS_INLINE_FUNCTION
  int numCells() const {return _cell_to_subcells_adj.extent(0)-1;}

  KOKKOS_INLINE_FUNCTION
  int numSubcellsOnCell(const int cell) const;
  inline
  int numSubcellsOnCellHost(const int cell) const;

  KOKKOS_INLINE_FUNCTION
  int numCellsOnSubcell(const int subcell) const;
  inline
  int numCellsOnSubcellHost(const int subcell) const;

  KOKKOS_INLINE_FUNCTION
  int subcellForCell(const int cell, const int local_subcell_index) const;
  inline
  int subcellForCellHost(const int cell, const int local_subcell_index) const;

  KOKKOS_INLINE_FUNCTION
  int cellForSubcell(const int subcell, const int local_cell_index) const;
  inline
  int cellForSubcellHost(const int subcell, const int local_cell_index) const;

  KOKKOS_INLINE_FUNCTION
  int localSubcellForSubcell(const int subcell, const int local_cell_index) const;
  inline
  int localSubcellForSubcellHost(const int subcell, const int local_cell_index) const;

protected:

  PHX::View<int*> _subcell_to_cells_adj;
  PHX::View<int*>::HostMirror _subcell_to_cells_adj_host;

  PHX::View<int*> _subcell_to_cells;
  PHX::View<int*>::HostMirror _subcell_to_cells_host;

  PHX::View<int*> _subcell_to_local_subcells;
  PHX::View<int*>::HostMirror _subcell_to_local_subcells_host;

  PHX::View<int*> _cell_to_subcells_adj;
  PHX::View<int*>::HostMirror _cell_to_subcells_adj_host;

  PHX::View<int*> _cell_to_subcells;
  PHX::View<int*>::HostMirror _cell_to_subcells_host;

};

class FaceConnectivity:
    public SubcellConnectivity
{
public:

  FaceConnectivity() = default;

  ~FaceConnectivity() = default;

  void setup(const panzer::LocalMeshPartition & partition);

};

// **********************************
// Inlined functions
// **********************************

PHALANX_HIP_HACK_KOKKOS_FUNCTION
int
SubcellConnectivity::
numSubcellsOnCell(const int cell) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(cell >= 0 and cell < numCells());
#endif
  return _cell_to_subcells_adj(cell+1)-_cell_to_subcells_adj(cell);
}

int
SubcellConnectivity::
numSubcellsOnCellHost(const int cell) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(cell >= 0 and cell < numCells());
#endif
  return _cell_to_subcells_adj_host(cell+1)-_cell_to_subcells_adj_host(cell);
}

PHALANX_HIP_HACK_KOKKOS_FUNCTION
int
SubcellConnectivity::
numCellsOnSubcell(const int subcell) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
#endif
  return _subcell_to_cells_adj(subcell+1)-_subcell_to_cells_adj(subcell);
}

int
SubcellConnectivity::
numCellsOnSubcellHost(const int subcell) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
#endif
  return _subcell_to_cells_adj_host(subcell+1)-_subcell_to_cells_adj_host(subcell);
}

PHALANX_HIP_HACK_KOKKOS_FUNCTION
int
SubcellConnectivity::
subcellForCell(const int cell, const int local_subcell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(cell >= 0 and cell < numCells());
  KOKKOS_ASSERT(local_subcell_index < numSubcellsOnCell(cell));
#endif
  const int index = _cell_to_subcells_adj(cell)+local_subcell_index;
  return _cell_to_subcells(index);
}

int
SubcellConnectivity::
subcellForCellHost(const int cell, const int local_subcell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(cell >= 0 and cell < numCells());
  KOKKOS_ASSERT(local_subcell_index < numSubcellsOnCellHost(cell));
#endif
  const int index = _cell_to_subcells_adj_host(cell)+local_subcell_index;
  return _cell_to_subcells_host(index);
}

PHALANX_HIP_HACK_KOKKOS_FUNCTION
int
SubcellConnectivity::
cellForSubcell(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
  KOKKOS_ASSERT(local_cell_index < numCellsOnSubcell(subcell));
#endif
  const int index = _subcell_to_cells_adj(subcell)+local_cell_index;
  return _subcell_to_cells(index);
}

int
SubcellConnectivity::
cellForSubcellHost(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
  KOKKOS_ASSERT(local_cell_index < numCellsOnSubcellHost(subcell));
#endif
  const int index = _subcell_to_cells_adj_host(subcell)+local_cell_index;
  return _subcell_to_cells_host(index);
}

PHALANX_HIP_HACK_KOKKOS_FUNCTION
int
SubcellConnectivity::
localSubcellForSubcell(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
  KOKKOS_ASSERT(local_cell_index < numCellsOnSubcell(subcell));
#endif
  const int index = _subcell_to_cells_adj(subcell)+local_cell_index;
  return _subcell_to_local_subcells(index);
}

int
SubcellConnectivity::
localSubcellForSubcellHost(const int subcell, const int local_cell_index) const
{
#ifdef PANZER_DEBUG
  KOKKOS_ASSERT(subcell >= 0 and subcell < numSubcells());
  KOKKOS_ASSERT(local_cell_index < numCellsOnSubcellHost(subcell));
#endif
  const int index = _subcell_to_cells_adj_host(subcell)+local_cell_index;
  return _subcell_to_local_subcells_host(index);
}

} // namespace panzer

#endif