RFieldComparison.tpp

#ifndef PRDC_CUDA_R_FIELD_COMPARISON_TPP
#define PRDC_CUDA_R_FIELD_COMPARISON_TPP
 
/*
* PSCF - Polymer Self-Consistent Field
*
* Copyright 2015 - 2025, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
#include "RFieldComparison.h"
#include <pscf/cuda/HostDArray.h>
 
namespace Pscf {
namespace Prdc {
namespace Cuda {
 
   // Default Constructor
   template <int D>
   RFieldComparison<D>::RFieldComparison()
   {};
 
   // Comparator for individual fields
   template <int D>
   double RFieldComparison<D>::compare(RField<D> const& a, 
                                       RField<D> const& b)
   {
      int nPoints = a.capacity();
 
      // Copy fields a,b to local arrays ha, hb on the host CPU
      HostDArray<cudaReal> ha(nPoints);
      HostDArray<cudaReal> hb(nPoints);
      ha = a;
      hb = b;
 
      fieldComparison_.compare(ha, hb);
      compared_ = true;
 
      return fieldComparison_.maxDiff();
   }
 
   // Comparator for arrays of fields
   template <int D>
   double RFieldComparison<D>::compare(DArray<RField<D>> const& a, 
                                       DArray<RField<D>> const& b)
   {
      int nFields = a.capacity();
      int nPoints = a[0].capacity();
 
      // Copy fields to HostDArray containers on CPU host
      DArray< HostDArray<cudaReal> > ha, hb;
      ha.allocate(nFields);
      hb.allocate(nFields);
      for (int i = 0; i < nFields; i++) {
         ha[i] = a[i];
         hb[i] = b[i];
      }
 
      // Perform comparison
      fieldComparison_.compare(ha, hb);
      compared_ = true;
 
      return fieldComparison_.maxDiff();
   }
 
}
}
}
#endif