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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 "interpolate_stencil.hpp"
#include <iostream>
bool verify(double weight, inputs in, outputs out) {
auto in1_v = in.in1->const_host_view();
auto in2_v = in.in2->const_host_view();
auto out_v = out.out->const_host_view();
// check consistency
assert(in1_v.lengths() == out_v.lengths());
assert(in2_v.lengths() == out_v.lengths());
auto &&len = out_v.lengths();
for (int k = 0; k < len[2]; ++k)
for (int i = 0; i < len[0]; ++i)
for (int j = 0; j < len[1]; ++j)
if (weight * in1_v(i, j, k) + (1.0 - weight) * in2_v(i, j, k) - out_v(i, j, k) > 1e-8) {
std::cerr << "error in " << i << ", " << j << ", " << k << ": "
<< "expected = " << weight * in1_v(i, j, k) + (1.0 - weight) * in2_v(i, j, k)
<< ", out = " << out_v(i, j, k) << ", diff = "
<< weight * in1_v(i, j, k) + (1.0 - weight) * in2_v(i, j, k) - out_v(i, j, k)
<< std::endl;
return false;
}
return true;
}
int main(int argc, char **argv) {
unsigned int d1, d2, d3;
const double weight = 0.4;
if (argc != 4) {
std::cerr << "Usage: " << argv[0] << " dimx dimy dimz\n";
return 1;
} else {
d1 = atoi(argv[1]);
d2 = atoi(argv[2]);
d3 = atoi(argv[3]);
}
// Add dimensions to the storage builder
const auto storage_builder = gridtools::storage::builder<storage_traits_t>.dimensions(d1, d2, d3).type<double>();
// Now we describe the iteration space. In this simple example the iteration space is just described by the full
// grid (no particular care has to be taken to describe halo points).
auto grid = gridtools::stencil::make_grid(d1, d2, d3);
// Create some data stores
inputs in = {storage_builder.initializer([](int i, int j, int k) { return i + j + k; }).build(),
storage_builder.initializer([](int i, int j, int k) { return 4 * i + 2 * j + k; }).build()};
outputs out = {storage_builder.build()};
// Use the wrapped computation
make_interpolate_stencil(grid, weight)(in, out);
if (!verify(weight, in, out)) {
std::cerr << "Failure" << std::endl;
return 1;
}
std::cout << "Success" << std::endl;
};
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