lwldslash_array_sse_w.cc

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/*! \file
 *  \brief Wilson Dslash linear operator array
 */
 
#include "chromabase.h"
#include "actions/ferm/linop/lwldslash_array_sse_w.h"
#include "sse_dslash.h"
#include "sse_dslash_qdp_packer.h"
 
namespace Chroma 
{ 
 
  //! Initialization routine
  void SSEWilsonDslashArray::init()
  {
    START_CODE();
 
    // Initialize internal structures for DSLASH
#if 0
    QDPIO::cout << "Calling init_sse_su3dslash()... " << std::endl;
#endif
 
    // Initialize using the total problem size
    init_sse_su3dslash(Layout::lattSize().slice(),
                        Layout::QDPXX_getSiteCoords,
                        Layout::QDPXX_getLinearSiteIndex,
                        Layout::QDPXX_nodeNumber);
 
 
    END_CODE();
  }
 
  //! Empty constructor. Must use create later
  SSEWilsonDslashArray::SSEWilsonDslashArray() 
  {
    init();
  }
 
  //! Full constructor
  SSEWilsonDslashArray::SSEWilsonDslashArray(Handle< FermState<T,P,Q> > state,
                                             int N5_,
                                             const AnisoParam_t& aniso_)
  {
    init(); 
    create(state,N5_,aniso_);
  }
 
 
  //! Full constructor
  SSEWilsonDslashArray::SSEWilsonDslashArray(Handle< FermState<T,P,Q> > state,
                                             int N5_)
  {
    init(); 
    create(state,N5_);
  }
 
 
  //! Creation routine
  void SSEWilsonDslashArray::create(Handle< FermState<T,P,Q> > state,
                                    int N5_)
  {
    multi1d<Real> cf(Nd);
    cf = 1.0;
    create(state, N5_, cf);
  }
 
 
  //! Creation routine with anisotropy
  void SSEWilsonDslashArray::create(Handle< FermState<T,P,Q> > state, int N5_,
                                    const AnisoParam_t& anisoParam) 
  {
    START_CODE();
 
    create(state, N5_, makeFermCoeffs(anisoParam));
 
    END_CODE();
  }
 
  //! Creation routine
  void SSEWilsonDslashArray::create(Handle< FermState<T,P,Q> > state, int N5_,
                                    const multi1d<Real>& coeffs_)
  {
    START_CODE();
 
    N5 = N5_;
    coeffs = coeffs_;
 
    // Save a copy of the fermbc
    fbc = state->getFermBC();
 
    // Sanity check
    if (fbc.operator->() == 0)
    {
      QDPIO::cerr << "SSEWilsonDslashArray: error: fbc is null" << std::endl;
      QDP_abort(1);
    }
 
    // Temporary copy - not kept
    multi1d<LatticeColorMatrix> u = state->getLinks();
  
    // Rescale the u fields by the anisotropy
    for(int mu=0; mu < u.size(); ++mu)
    {
      u[mu] *= coeffs[mu];
    }
 
    // Pack the gauge fields
    packed_gauge.resize( Nd * Layout::sitesOnNode() );
 
#if 0
    QDPIO::cout << "Done " << std::endl << std::flush;
 
    QDPIO::cout << "Calling pack_gauge_field..." << std::flush;
#endif
 
    SSEDslash::qdp_pack_gauge(u, packed_gauge);
  
#if 0
    QDPIO::cout << "Done" << std::endl << std::flush;
#endif
    
    END_CODE();
  }
 
 
  SSEWilsonDslashArray::~SSEWilsonDslashArray() 
  {
    START_CODE();
 
#if 0
    QDPIO::cout << "Calling free_sse_su3dslash()... " << std::endl;
#endif
 
    free_sse_su3dslash();
 
    END_CODE();
  }
 
 
  //! General Wilson-Dirac dslash
  /*! \ingroup linop
   * Wilson dslash
   *
   * Arguments:
   *
   *  \param chi      Result                                            (Write)
   *  \param psi      Pseudofermion field                               (Read)
   *  \param isign    D'^dag or D' ( MINUS | PLUS ) resp.               (Read)
   *  \param cb       Checkerboard of OUTPUT std::vector                        (Read) 
   */
  void 
  SSEWilsonDslashArray::apply (multi1d<LatticeFermion>& chi, 
                               const multi1d<LatticeFermion>& psi, 
                               enum PlusMinus isign, int cb) const
  {
    START_CODE();
 
    if( chi.size() != N5 ) chi.resize(N5);
 
    for(int n=0; n < N5; ++n)
      apply(chi[n], psi[n], isign, cb);
 
    END_CODE();
  }
 
 
  //! General Wilson-Dirac dslash
  /*! \ingroup linop
   * Wilson dslash
   *
   * Arguments:
   *
   *  \param chi              Result                                            (Write)
   *  \param psi              Pseudofermion field                               (Read)
   *  \param isign      D'^dag or D' ( MINUS | PLUS ) resp.             (Read)
   *  \param cb       Checkerboard of OUTPUT std::vector                        (Read) 
   */
  void
  SSEWilsonDslashArray::apply (LatticeFermion& chi, const LatticeFermion& psi, 
                               enum PlusMinus isign, int cb) const
  {
    START_CODE();
 
    /* Pass the right parities. 
     *
     * SZIN standard is that cb is cb of INPUT 
     * Chroma standard is that the cb is cb of OUTPUT
     *
     * Need to invert cb for SZIN style SSE call 
   
     *
     *
     * Pass all the fermion and all the gauge pieces
     *
     * NOTE: this breaks usage from SZIN. However, Chroma and SSE dslash can handle 
     * odd subgrid lattice sizes, whereas SZIN cannot. Thus, I must pass all fermion
     * cbs to support such flexibility.
     *
     */
    sse_su3dslash_wilson((SSEREAL *)&(packed_gauge[0]),
                         (SSEREAL *)&(psi.elem(0).elem(0).elem(0).real()),
                         (SSEREAL *)&(chi.elem(0).elem(0).elem(0).real()),
                         (int)isign, (1-cb));
  
    getFermBC().modifyF(chi, QDP::rb[cb]);
 
    END_CODE();
  }
 
} // End Namespace Chroma