cuda/CField.tpp

#ifndef PRDC_CUDA_C_FIELD_TPP
#define PRDC_CUDA_C_FIELD_TPP
 
/*
* PSCF Package 
*
* Copyright 2016 - 2022, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
#include "CField.h"
 
namespace Pscf {
namespace Prdc {
namespace Cuda {
 
   using namespace Util;
   using namespace Pscf;
 
   template <int D>
   CField<D>::CField()
    : DeviceArray<cudaComplex>()
   {}
 
   template <int D>
   CField<D>::CField(IntVec<D> const & meshDimensions)
    : DeviceArray<cudaComplex>()
   {  allocate(meshDimensions); }
 
   /*
   * Destructor.
   */
   template <int D>
   CField<D>::~CField()
   {}
 
   /*
   * Copy constructor.
   */
   template <int D>
   CField<D>::CField(const CField<D>& other)
    : DeviceArray<cudaComplex>(other),
      meshDimensions_(0)
   {
      meshDimensions_ = other.meshDimensions_;
   }
 
   /*
   * Assignment from another RField<D>.
   */
   template <int D>
   CField<D>& CField<D>::operator = (const CField<D>& other)
   {
      DeviceArray<cudaComplex>::operator = (other);
      meshDimensions_ = other.meshDimensions_;
 
      return *this;
   }
 
   /*
   * Assignment from RHS HostDArray<Data> host array.
   */
   template <int D>
   CField<D>& CField<D>::operator = (HostDArray<cudaComplex> const & other)
   {
      // Preconditions: both arrays must be allocated with equal capacities
      if (!other.isAllocated()) {
         UTIL_THROW("Error: RHS HostDArray<cudaComplex> is not allocated.");
      }
      if (!isAllocated()) {
         UTIL_THROW("Error: LHS CField<D> is not allocated.");
      }
      if (capacity_ != other.capacity()) {
         UTIL_THROW("Cannot assign Fields of unequal capacity");
      }
 
      // Use base class assignment operator to copy elements
      DeviceArray<cudaComplex>::operator = (other);
 
      return *this;
   }
 
   /*
   * Allocate the underlying C array sized for an associated mesh.
   */
   template <int D>
   void CField<D>::allocate(IntVec<D> const & meshDimensions)
   {
      int size = 1;
      for (int i = 0; i < D; ++i) {
         UTIL_CHECK(meshDimensions[i] > 0);
         meshDimensions_[i] = meshDimensions[i];
         size *= meshDimensions[i];
      }
      DeviceArray<cudaComplex>::allocate(size);
   }
 
   /*
   * Associate this object with a slice of another DeviceArray.
   */
   template <int D>
   void CField<D>::associate(DeviceArray<cudaComplex>& arr, int beginId, 
                             IntVec<D> const & meshDimensions)
   {
      int size = 1;
      for (int i = 0; i < D; ++i) {
         UTIL_CHECK(meshDimensions[i] > 0);
         meshDimensions_[i] = meshDimensions[i];
         size *= meshDimensions[i];
      }
      DeviceArray<cudaComplex>::associate(arr, beginId, size);
   }
 
}
}
}
#endif