diff options
Diffstat (limited to 'unsupported/test/cxx11_tensor_striding.cpp')
-rw-r--r-- | unsupported/test/cxx11_tensor_striding.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/unsupported/test/cxx11_tensor_striding.cpp b/unsupported/test/cxx11_tensor_striding.cpp new file mode 100644 index 000000000..935b908cc --- /dev/null +++ b/unsupported/test/cxx11_tensor_striding.cpp @@ -0,0 +1,119 @@ +// 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_striding() +{ + Tensor<float, 4, DataLayout> tensor(2,3,5,7); + tensor.setRandom(); + array<ptrdiff_t, 4> strides; + strides[0] = 1; + strides[1] = 1; + strides[2] = 1; + strides[3] = 1; + + Tensor<float, 4, DataLayout> no_stride; + no_stride = tensor.stride(strides); + + VERIFY_IS_EQUAL(no_stride.dimension(0), 2); + VERIFY_IS_EQUAL(no_stride.dimension(1), 3); + VERIFY_IS_EQUAL(no_stride.dimension(2), 5); + VERIFY_IS_EQUAL(no_stride.dimension(3), 7); + + for (int i = 0; i < 2; ++i) { + for (int j = 0; j < 3; ++j) { + for (int k = 0; k < 5; ++k) { + for (int l = 0; l < 7; ++l) { + VERIFY_IS_EQUAL(tensor(i,j,k,l), no_stride(i,j,k,l)); + } + } + } + } + + strides[0] = 2; + strides[1] = 4; + strides[2] = 2; + strides[3] = 3; + Tensor<float, 4, DataLayout> stride; + stride = tensor.stride(strides); + + VERIFY_IS_EQUAL(stride.dimension(0), 1); + VERIFY_IS_EQUAL(stride.dimension(1), 1); + VERIFY_IS_EQUAL(stride.dimension(2), 3); + VERIFY_IS_EQUAL(stride.dimension(3), 3); + + for (int i = 0; i < 1; ++i) { + for (int j = 0; j < 1; ++j) { + for (int k = 0; k < 3; ++k) { + for (int l = 0; l < 3; ++l) { + VERIFY_IS_EQUAL(tensor(2*i,4*j,2*k,3*l), stride(i,j,k,l)); + } + } + } + } +} + + +template<int DataLayout> +static void test_striding_as_lvalue() +{ + Tensor<float, 4, DataLayout> tensor(2,3,5,7); + tensor.setRandom(); + array<ptrdiff_t, 4> strides; + strides[0] = 2; + strides[1] = 4; + strides[2] = 2; + strides[3] = 3; + + Tensor<float, 4, DataLayout> result(3, 12, 10, 21); + result.stride(strides) = tensor; + + for (int i = 0; i < 2; ++i) { + for (int j = 0; j < 3; ++j) { + for (int k = 0; k < 5; ++k) { + for (int l = 0; l < 7; ++l) { + VERIFY_IS_EQUAL(tensor(i,j,k,l), result(2*i,4*j,2*k,3*l)); + } + } + } + } + + array<ptrdiff_t, 4> no_strides; + no_strides[0] = 1; + no_strides[1] = 1; + no_strides[2] = 1; + no_strides[3] = 1; + Tensor<float, 4, DataLayout> result2(3, 12, 10, 21); + result2.stride(strides) = tensor.stride(no_strides); + + for (int i = 0; i < 2; ++i) { + for (int j = 0; j < 3; ++j) { + for (int k = 0; k < 5; ++k) { + for (int l = 0; l < 7; ++l) { + VERIFY_IS_EQUAL(tensor(i,j,k,l), result2(2*i,4*j,2*k,3*l)); + } + } + } + } +} + + +void test_cxx11_tensor_striding() +{ + CALL_SUBTEST(test_simple_striding<ColMajor>()); + CALL_SUBTEST(test_simple_striding<RowMajor>()); + CALL_SUBTEST(test_striding_as_lvalue<ColMajor>()); + CALL_SUBTEST(test_striding_as_lvalue<RowMajor>()); +} |