lwldslash_w_cppd.cc

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/*! \file
 *  \brief Wilson Dslash linear operator
 */
 
#include "chromabase.h"
#include "actions/ferm/linop/lwldslash_w_cppd.h"
#include "cpp_dslash.h"
#include "cpp_dslash_qdp_packer.h"
 
 
 
using namespace CPlusPlusWilsonDslash;
 
namespace Chroma 
{ 
  //! Initialization routine
  void CPPWilsonDslashD::init()
  {
    // Initialize internal structures for DSLASH
#if 0
    QDPIO::cout << "Calling init_sse_su3dslash()... " << std::endl;
#endif
 
 
      // Initialize using the total problem size
      D=new Dslash<double>(Layout::lattSize().slice(),
                        Layout::QDPXX_getSiteCoords,
                        Layout::QDPXX_getLinearSiteIndex,
                        Layout::QDPXX_nodeNumber);
      
  }
 
 
  //! Empty constructor
  CPPWilsonDslashD::CPPWilsonDslashD()
#ifndef CHROMA_STATIC_PACKED_GAUGE
         : packed_gauge(nullptr)
#endif
  {
 
    init();
  }
  
  //! Full constructor
  CPPWilsonDslashD::CPPWilsonDslashD(Handle< FermState<T,P,Q> > state)
#ifndef CHROMA_STATIC_PACKED_GAUGE
         : packed_gauge(nullptr)
#endif
  {
    init();
    create(state);
  }
  
  //! Full constructor with anisotropy
  CPPWilsonDslashD::CPPWilsonDslashD(Handle< FermState<T,P,Q> > state,
                                   const AnisoParam_t& aniso_) 
#ifndef CHROMA_STATIC_PACKED_GAUGE
         : packed_gauge(nullptr)
#endif
  {
    init();
    create(state, aniso_);
  }
 
  //! Full constructor with general coefficients
  CPPWilsonDslashD::CPPWilsonDslashD(Handle< FermState<T,P,Q> > state,
                                   const multi1d<Real>& coeffs_)
#ifndef CHROMA_STATIC_PACKED_GAUGE
         : packed_gauge(nullptr)
#endif
  {
    init();
    create(state, coeffs_);
  }
 
  //! Creation routine
  void CPPWilsonDslashD::create(Handle< FermState<T,P,Q> > state)
  {
    multi1d<Real> cf(Nd);
    cf = 1.0;
    create(state, cf);
  }
 
  //! Creation routine with anisotropy
  void CPPWilsonDslashD::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 CPPWilsonDslashD::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 << "CPPWilsonDslashD: error: fbc is null" << std::endl;
      QDP_abort(1);
    }
 
    // Fold in anisotropy
    multi1d<LatticeColorMatrixD> 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() );
    // Allocate as a pointer -- In the case of static allocation
    // Always allocate if null. If the packed gauge is static, it will not be null after the first allocation.
    if ( packed_gauge == nullptr ) {
        packed_gauge = (PrimitiveSU3MatrixD*)QDP::Allocator::theQDPAllocator::Instance().allocate( Layout::sitesOnNode()*Nd*sizeof(PrimitiveSU3MatrixD),
                        QDP::Allocator::DEFAULT);
        if( packed_gauge == nullptr ) {
                QDPIO::cout << "Failed to allocate packed gauge in CPP_Dslash " <<std::endl;
                QDP_abort(1);
        }
    }
 
#if 0
    QDPIO::cout << "Done " << std::endl << std::flush;
 
    QDPIO::cout << "Calling pack_gauge_field..." << std::flush;
#endif
 
    qdp_pack_gauge(u, packed_gauge);
  
#if 0
    QDPIO::cout << "Done" << std::endl << std::flush;
#endif
 
    END_CODE();
  }
 
 
  CPPWilsonDslashD::~CPPWilsonDslashD() 
  {
    START_CODE();
 
#ifndef CHROMA_STATIC_PACKED_GAUGE
    QDP::Allocator::theQDPAllocator::Instance().free(packed_gauge);
#endif
 
    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
  CPPWilsonDslashD::apply (T& chi, const T& 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;
 
 
    (*D)((double *)&(chi.elem(all.start()).elem(0).elem(0).real()),       
         (double *)&(psi.elem(all.start()).elem(0).elem(0).real()),
         (double *)&(packed_gauge[0]),
         isign, 
         source_cb);
 
    // 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