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/*
* GridTools
*
* Copyright (c) 2014-2023, ETH Zurich
* All rights reserved.
*
* Please, refer to the LICENSE file in the root directory.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <gridtools/common/defs.hpp>
#include <gridtools/stencil/cartesian.hpp>
#include <gridtools/storage/builder.hpp>
#include <gridtools/storage/sid.hpp>
using namespace gridtools;
using namespace stencil;
using namespace cartesian;
using namespace expressions;
#ifdef GT_CUDACC
#include <gridtools/stencil/gpu.hpp>
#include <gridtools/storage/gpu.hpp>
using stencil_backend_t = stencil::gpu<>;
using storage_traits_t = storage::gpu;
#else
#include <gridtools/stencil/cpu_ifirst.hpp>
#include <gridtools/storage/cpu_ifirst.hpp>
using stencil_backend_t = stencil::cpu_ifirst<>;
using storage_traits_t = storage::cpu_ifirst;
#endif
struct lap_function {
using in = in_accessor<0, extent<-1, 1, -1, 1>>;
using lap = inout_accessor<1>;
using param_list = make_param_list<in, lap>;
template <typename Evaluation>
GT_FUNCTION static void apply(Evaluation &&eval) {
eval(lap()) = eval(-4. * in() + in(1, 0) + in(0, 1) + in(-1, 0) + in(0, -1));
}
};
int main() {
uint_t Ni = 10;
uint_t Nj = 12;
uint_t Nk = 20;
int halo = 1;
auto builder = storage::builder<storage_traits_t> //
.type<double>() //
.dimensions(Ni, Nj, Nk) //
.halos(halo, halo, 0); //
auto phi = builder();
auto lap = builder();
halo_descriptor boundary_i(halo, halo, halo, Ni - halo - 1, Ni);
halo_descriptor boundary_j(halo, halo, halo, Nj - halo - 1, Nj);
auto grid = make_grid(boundary_i, boundary_j, Nk);
run_single_stage(lap_function(), stencil_backend_t(), grid, phi, lap);
}
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