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86 lines
2.5 KiB
86 lines
2.5 KiB
// This file is part of Eigen, a lightweight C++ template library |
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// for linear algebra. |
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// |
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// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com> |
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// |
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// This Source Code Form is subject to the terms of the Mozilla |
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// Public License v. 2.0. If a copy of the MPL was not distributed |
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// with this file, You can obtain one at the mozilla.org home page |
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#include "main.h" |
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#include <Eigen/CXX11/Tensor> |
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template<typename Scalar> |
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static void test_default() |
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{ |
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Tensor<Scalar, 1> vec(6); |
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vec.setRandom(); |
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// Fixme: we should check that the generated numbers follow a uniform |
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// distribution instead. |
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for (int i = 1; i < 6; ++i) { |
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VERIFY_IS_NOT_EQUAL(vec(i), vec(i-1)); |
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} |
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} |
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template<typename Scalar> |
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static void test_normal() |
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{ |
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Tensor<Scalar, 1> vec(6); |
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vec.template setRandom<Eigen::internal::NormalRandomGenerator<Scalar>>(); |
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// Fixme: we should check that the generated numbers follow a gaussian |
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// distribution instead. |
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for (int i = 1; i < 6; ++i) { |
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VERIFY_IS_NOT_EQUAL(vec(i), vec(i-1)); |
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} |
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} |
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struct MyGenerator { |
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MyGenerator() { } |
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MyGenerator(const MyGenerator&) { } |
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// Return a random value to be used. "element_location" is the |
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// location of the entry to set in the tensor, it can typically |
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// be ignored. |
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int operator()(Eigen::DenseIndex element_location, Eigen::DenseIndex /*unused*/ = 0) const { |
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return static_cast<int>(3 * element_location); |
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} |
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// Same as above but generates several numbers at a time. |
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internal::packet_traits<int>::type packetOp( |
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Eigen::DenseIndex packet_location, Eigen::DenseIndex /*unused*/ = 0) const { |
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const int packetSize = internal::packet_traits<int>::size; |
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EIGEN_ALIGN_MAX int values[packetSize]; |
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for (int i = 0; i < packetSize; ++i) { |
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values[i] = static_cast<int>(3 * (packet_location + i)); |
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} |
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return internal::pload<typename internal::packet_traits<int>::type>(values); |
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} |
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}; |
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static void test_custom() |
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{ |
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Tensor<int, 1> vec(6); |
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vec.setRandom<MyGenerator>(); |
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for (int i = 0; i < 6; ++i) { |
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VERIFY_IS_EQUAL(vec(i), 3*i); |
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} |
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} |
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EIGEN_DECLARE_TEST(cxx11_tensor_random) |
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{ |
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CALL_SUBTEST((test_default<float>())); |
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CALL_SUBTEST((test_normal<float>())); |
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CALL_SUBTEST((test_default<double>())); |
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CALL_SUBTEST((test_normal<double>())); |
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CALL_SUBTEST((test_default<Eigen::half>())); |
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CALL_SUBTEST((test_normal<Eigen::half>())); |
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CALL_SUBTEST((test_default<Eigen::bfloat16>())); |
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CALL_SUBTEST((test_normal<Eigen::bfloat16>())); |
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CALL_SUBTEST(test_custom()); |
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}
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