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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
#include <Eigen/CXX11/Tensor>
using Eigen::Tensor;
template<int DataLayout>
static void test_simple_padding()
{
Tensor<float, 4, DataLayout> tensor(2,3,5,7);
tensor.setRandom();
array<std::pair<ptrdiff_t, ptrdiff_t>, 4> paddings;
paddings[0] = std::make_pair(0, 0);
paddings[1] = std::make_pair(2, 1);
paddings[2] = std::make_pair(3, 4);
paddings[3] = std::make_pair(0, 0);
Tensor<float, 4, DataLayout> padded;
padded = tensor.pad(paddings);
VERIFY_IS_EQUAL(padded.dimension(0), 2+0);
VERIFY_IS_EQUAL(padded.dimension(1), 3+3);
VERIFY_IS_EQUAL(padded.dimension(2), 5+7);
VERIFY_IS_EQUAL(padded.dimension(3), 7+0);
for (int i = 0; i < 2; ++i) {
for (int j = 0; j < 6; ++j) {
for (int k = 0; k < 12; ++k) {
for (int l = 0; l < 7; ++l) {
if (j >= 2 && j < 5 && k >= 3 && k < 8) {
VERIFY_IS_EQUAL(padded(i,j,k,l), tensor(i,j-2,k-3,l));
} else {
VERIFY_IS_EQUAL(padded(i,j,k,l), 0.0f);
}
}
}
}
}
}
template<int DataLayout>
static void test_padded_expr()
{
Tensor<float, 4, DataLayout> tensor(2,3,5,7);
tensor.setRandom();
array<std::pair<ptrdiff_t, ptrdiff_t>, 4> paddings;
paddings[0] = std::make_pair(0, 0);
paddings[1] = std::make_pair(2, 1);
paddings[2] = std::make_pair(3, 4);
paddings[3] = std::make_pair(0, 0);
Eigen::DSizes<ptrdiff_t, 2> reshape_dims;
reshape_dims[0] = 12;
reshape_dims[1] = 84;
Tensor<float, 2, DataLayout> result;
result = tensor.pad(paddings).reshape(reshape_dims);
for (int i = 0; i < 2; ++i) {
for (int j = 0; j < 6; ++j) {
for (int k = 0; k < 12; ++k) {
for (int l = 0; l < 7; ++l) {
const float result_value = DataLayout == ColMajor ?
result(i+2*j,k+12*l) : result(j+6*i,l+7*k);
if (j >= 2 && j < 5 && k >= 3 && k < 8) {
VERIFY_IS_EQUAL(result_value, tensor(i,j-2,k-3,l));
} else {
VERIFY_IS_EQUAL(result_value, 0.0f);
}
}
}
}
}
}
EIGEN_DECLARE_TEST(cxx11_tensor_padding)
{
CALL_SUBTEST(test_simple_padding<ColMajor>());
CALL_SUBTEST(test_simple_padding<RowMajor>());
CALL_SUBTEST(test_padded_expr<ColMajor>());
CALL_SUBTEST(test_padded_expr<RowMajor>());
}
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