1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #include "main.h"
11
12 #include <Eigen/Core>
13 #include <Eigen/CXX11/Tensor>
14
15 using Eigen::MatrixXf;
16 using Eigen::Tensor;
17
test_simple()18 static void test_simple()
19 {
20 MatrixXf m1(3,3);
21 MatrixXf m2(3,3);
22 m1.setRandom();
23 m2.setRandom();
24
25 TensorMap<Tensor<float, 2> > mat1(m1.data(), 3,3);
26 TensorMap<Tensor<float, 2> > mat2(m2.data(), 3,3);
27
28 Tensor<float, 2> mat3(3,3);
29 mat3 = mat1;
30
31 typedef Tensor<float, 1>::DimensionPair DimPair;
32 Eigen::array<DimPair, 1> dims;
33 dims[0] = DimPair(1, 0);
34
35 mat3 = mat3.contract(mat2, dims).eval();
36
37 VERIFY_IS_APPROX(mat3(0, 0), (m1*m2).eval()(0,0));
38 VERIFY_IS_APPROX(mat3(0, 1), (m1*m2).eval()(0,1));
39 VERIFY_IS_APPROX(mat3(0, 2), (m1*m2).eval()(0,2));
40 VERIFY_IS_APPROX(mat3(1, 0), (m1*m2).eval()(1,0));
41 VERIFY_IS_APPROX(mat3(1, 1), (m1*m2).eval()(1,1));
42 VERIFY_IS_APPROX(mat3(1, 2), (m1*m2).eval()(1,2));
43 VERIFY_IS_APPROX(mat3(2, 0), (m1*m2).eval()(2,0));
44 VERIFY_IS_APPROX(mat3(2, 1), (m1*m2).eval()(2,1));
45 VERIFY_IS_APPROX(mat3(2, 2), (m1*m2).eval()(2,2));
46 }
47
48
test_const()49 static void test_const()
50 {
51 MatrixXf input(3,3);
52 input.setRandom();
53 MatrixXf output = input;
54 output.rowwise() -= input.colwise().maxCoeff();
55
56 Eigen::array<int, 1> depth_dim;
57 depth_dim[0] = 0;
58 Tensor<float, 2>::Dimensions dims2d;
59 dims2d[0] = 1;
60 dims2d[1] = 3;
61 Eigen::array<int, 2> bcast;
62 bcast[0] = 3;
63 bcast[1] = 1;
64 const TensorMap<Tensor<const float, 2> > input_tensor(input.data(), 3, 3);
65 Tensor<float, 2> output_tensor= (input_tensor - input_tensor.maximum(depth_dim).eval().reshape(dims2d).broadcast(bcast));
66
67 for (int i = 0; i < 3; ++i) {
68 for (int j = 0; j < 3; ++j) {
69 VERIFY_IS_APPROX(output(i, j), output_tensor(i, j));
70 }
71 }
72 }
73
74
test_cxx11_tensor_forced_eval()75 void test_cxx11_tensor_forced_eval()
76 {
77 CALL_SUBTEST(test_simple());
78 CALL_SUBTEST(test_const());
79 }
80