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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/Core>
#include <Eigen/CXX11/Tensor>
using Eigen::MatrixXf;
using Eigen::Tensor;
static void test_simple() {
MatrixXf m1(3, 3);
MatrixXf m2(3, 3);
m1.setRandom();
m2.setRandom();
TensorMap<Tensor<float, 2> > mat1(m1.data(), 3, 3);
TensorMap<Tensor<float, 2> > mat2(m2.data(), 3, 3);
Tensor<float, 2> mat3(3, 3);
mat3 = mat1;
typedef Tensor<float, 1>::DimensionPair DimPair;
Eigen::array<DimPair, 1> dims;
dims[0] = DimPair(1, 0);
mat3 = mat3.contract(mat2, dims).eval();
VERIFY_IS_APPROX(mat3(0, 0), (m1 * m2).eval()(0, 0));
VERIFY_IS_APPROX(mat3(0, 1), (m1 * m2).eval()(0, 1));
VERIFY_IS_APPROX(mat3(0, 2), (m1 * m2).eval()(0, 2));
VERIFY_IS_APPROX(mat3(1, 0), (m1 * m2).eval()(1, 0));
VERIFY_IS_APPROX(mat3(1, 1), (m1 * m2).eval()(1, 1));
VERIFY_IS_APPROX(mat3(1, 2), (m1 * m2).eval()(1, 2));
VERIFY_IS_APPROX(mat3(2, 0), (m1 * m2).eval()(2, 0));
VERIFY_IS_APPROX(mat3(2, 1), (m1 * m2).eval()(2, 1));
VERIFY_IS_APPROX(mat3(2, 2), (m1 * m2).eval()(2, 2));
}
static void test_const() {
MatrixXf input(3, 3);
input.setRandom();
MatrixXf output = input;
output.rowwise() -= input.colwise().maxCoeff();
Eigen::array<int, 1> depth_dim;
depth_dim[0] = 0;
Tensor<float, 2>::Dimensions dims2d;
dims2d[0] = 1;
dims2d[1] = 3;
Eigen::array<int, 2> bcast;
bcast[0] = 3;
bcast[1] = 1;
const TensorMap<const Tensor<float, 2> > input_tensor(input.data(), 3, 3);
Tensor<float, 2> output_tensor =
(input_tensor - input_tensor.maximum(depth_dim).eval().reshape(dims2d).broadcast(bcast));
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 3; ++j) {
VERIFY_IS_APPROX(output(i, j), output_tensor(i, j));
}
}
}
EIGEN_DECLARE_TEST(cxx11_tensor_forced_eval) {
CALL_SUBTEST(test_simple());
CALL_SUBTEST(test_const());
}