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muSpectre/src/libmufft/fft_engine_base.cc
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fft_engine_base.cc
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/**
* @file fft_engine_base.cc
*
* @author Till Junge <till.junge@altermail.ch>
*
* @date 03 Dec 2017
*
* @brief implementation for FFT engine base class
*
* Copyright © 2017 Till Junge
*
* µFFT is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3, or (at
* your option) any later version.
*
* µFFT is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with µFFT; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* * Boston, MA 02111-1307, USA.
*
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining it
* with proprietary FFT implementations or numerical libraries, containing parts
* covered by the terms of those libraries' licenses, the licensors of this
* Program grant you additional permission to convey the resulting work.
*/
#include "fft_engine_base.hh"
namespace muFFT {
/* ---------------------------------------------------------------------- */
template <Dim_t Dim>
FFTEngineBase<Dim>::FFTEngineBase(Ccoord resolutions, Dim_t nb_components,
Communicator comm)
: comm{comm}, subdomain_resolutions{resolutions}, subdomain_locations{},
fourier_resolutions{
muGrid::CcoordOps::get_hermitian_sizes(resolutions)},
fourier_locations{}, domain_resolutions{resolutions},
work{muGrid::make_field<Workspace_t>("work space", work_space_container,
nb_components)},
norm_factor{1. / muGrid::CcoordOps::get_size(domain_resolutions)},
nb_components{nb_components} {}
/* ---------------------------------------------------------------------- */
template <Dim_t Dim>
void FFTEngineBase<Dim>::initialise(FFT_PlanFlags /*plan_flags*/) {
this->work_space_container.initialise();
}
/* ---------------------------------------------------------------------- */
template <Dim_t Dim>
size_t FFTEngineBase<Dim>::size() const {
return muGrid::CcoordOps::get_size(this->subdomain_resolutions);
}
/* ---------------------------------------------------------------------- */
template <Dim_t Dim>
size_t FFTEngineBase<Dim>::workspace_size() const {
return this->work_space_container.size();
}
template class FFTEngineBase<muGrid::twoD>;
template class FFTEngineBase<muGrid::threeD>;
} // namespace muFFT
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