lwldslash_w_sse.cc

Go to the documentation of this file.

/*! \file
 *  \brief Wilson Dslash linear operator
 */
 
#include "chromabase.h"
#include "actions/ferm/linop/lwldslash_w_sse.h"
#include <sse_config.h>
#include "sse_dslash.h"
#include "sse_dslash_qdp_packer.h"
 
namespace Chroma 
{ 
  namespace SSERefCount {
        static bool initedP = false;
  }
  //! Initialization routine
  void SSEWilsonDslash::init()
  {
    // Initialize internal structures for DSLASH
#if 0
    QDPIO::cout << "Calling init_sse_su3dslash()... " << std::endl;
#endif
 
    if( SSERefCount::initedP == false ) {
      // Initialize using the total problem size
      init_sse_su3dslash(Layout::lattSize().slice(),
                        Layout::QDPXX_getSiteCoords,
                        Layout::QDPXX_getLinearSiteIndex,
                        Layout::QDPXX_nodeNumber);
      SSERefCount::initedP = true;
    }
  }
 
 
  //! Empty constructor
  SSEWilsonDslash::SSEWilsonDslash()
  {
    init();
  }
  
  //! Full constructor
  SSEWilsonDslash::SSEWilsonDslash(Handle< FermState<T,P,Q> > state)
  { 
    init();
    create(state);
  }
  
  //! Full constructor with anisotropy
  SSEWilsonDslash::SSEWilsonDslash(Handle< FermState<T,P,Q> > state,
                                   const AnisoParam_t& aniso_) 
  {
    init();
    create(state, aniso_);
  }
 
  //! Full constructor with general coefficients
  SSEWilsonDslash::SSEWilsonDslash(Handle< FermState<T,P,Q> > state,
                                   const multi1d<Real>& coeffs_)
  {
    init();
    create(state, coeffs_);
  }
 
  //! Creation routine
  void SSEWilsonDslash::create(Handle< FermState<T,P,Q> > state)
  {
    multi1d<Real> cf(Nd);
    cf = 1.0;
    create(state, cf);
  }
 
  //! Creation routine with anisotropy
  void SSEWilsonDslash::create(Handle< FermState<T,P,Q> > state,
                               const AnisoParam_t& anisoParam) 
  {
    START_CODE();
 
    create(state, makeFermCoeffs(anisoParam));
 
    END_CODE();
  }
 
  //! Full constructor with general coefficients
  void SSEWilsonDslash::create(Handle< FermState<T,P,Q> > state,
                               const multi1d<Real>& coeffs_)
  {
    START_CODE();
 
    // Save a copy of the aniso params original fields and with aniso folded in
    coeffs = coeffs_;
 
    // Save a copy of the fermbc
    fbc = state->getFermBC();
 
    // Sanity check
    if (fbc.operator->() == 0)
    {
      QDPIO::cerr << "SSEWilsonDslash: error: fbc is null" << std::endl;
      QDP_abort(1);
    }
 
    // Fold in anisotropy
    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();
  }
 
 
  SSEWilsonDslash::~SSEWilsonDslash() 
  {
    START_CODE();
 
#if 0
    QDPIO::cout << "Calling free_sse_su3dslash()... " << std::endl;
#endif
 
    // Never free
    // 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
  SSEWilsonDslash::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.
     *
     */
    int source_cb = 1 - cb;
    int target_cb = cb;
    int cbsites = QDP::Layout::sitesOnNode()/2;
 
    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, source_cb);
  
 
    getFermBC().modifyF(chi, QDP::rb[cb]);
 
    END_CODE();
  }
 
} // End Namespace Chroma