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- //---------------------------------------------------------------------------//
- // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
- //
- // Distributed under the Boost Software License, Version 1.0
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- //
- // See http://boostorg.github.com/compute for more information.
- //---------------------------------------------------------------------------//
- #define BOOST_TEST_MODULE TestUniformRealDistribution
- #include <boost/test/unit_test.hpp>
- #include <boost/compute/system.hpp>
- #include <boost/compute/command_queue.hpp>
- #include <boost/compute/algorithm/count_if.hpp>
- #include <boost/compute/algorithm/transform.hpp>
- #include <boost/compute/function.hpp>
- #include <boost/compute/container/vector.hpp>
- #include <boost/compute/random/default_random_engine.hpp>
- #include <boost/compute/random/uniform_real_distribution.hpp>
- #include <boost/compute/lambda.hpp>
- #include <boost/compute/types/fundamental.hpp>
- #include "context_setup.hpp"
- BOOST_AUTO_TEST_CASE(uniform_real_distribution_doctest)
- {
- using boost::compute::lambda::_1;
- boost::compute::vector<float> vec(128, context);
- //! [generate]
- // initialize the default random engine
- boost::compute::default_random_engine engine(queue);
- // setup the uniform distribution to produce floats between 1 and 100
- boost::compute::uniform_real_distribution<float> distribution(1.0f, 100.0f);
- // generate the random values and store them to 'vec'
- distribution.generate(vec.begin(), vec.end(), engine, queue);
- //! [generate]
- BOOST_CHECK_EQUAL(
- boost::compute::count_if(
- vec.begin(), vec.end(), _1 < 1.0f || _1 >= 100.0f, queue
- ),
- size_t(0)
- );
- }
- template<class T>
- class range_test_engine
- {
- public:
- explicit range_test_engine(boost::compute::command_queue &queue) {
- (void) queue;
- }
- template<class OutputIterator, class Function>
- void generate(OutputIterator first, OutputIterator last, Function op, boost::compute::command_queue &queue)
- {
- boost::compute::vector<T> tmp(std::distance(first, last), queue.get_context());
- BOOST_COMPUTE_FUNCTION(T, max_random, (const T x),
- {
- if(get_global_id(0) < 1)
- return (ValueType) MAX_RANDOM;
- else
- return (ValueType) 0;
- });
- max_random.define("MAX_RANDOM", "UINT_MAX");
- max_random.define("ValueType", boost::compute::type_name<T>());
- boost::compute::transform(tmp.begin(), tmp.end(), tmp.begin(), max_random, queue);
- boost::compute::transform(tmp.begin(), tmp.end(), first, op, queue);
- }
- };
- // For checking if result is in the correct range [low, hi)
- BOOST_AUTO_TEST_CASE(uniform_real_distribution_range)
- {
- using boost::compute::lambda::_1;
- boost::compute::vector<float> vec(32, context);
- // initialize the range_test_engine
- range_test_engine<boost::compute::uint_> engine(queue);
- // setup the uniform distribution to produce floats between 0.9 and 1.0
- boost::compute::uniform_real_distribution<float> distribution(0.9f, 1.0f);
- // generate the random values and store them to 'vec'
- distribution.generate(vec.begin(), vec.end(), engine, queue);
- BOOST_CHECK_EQUAL(
- boost::compute::count_if(
- vec.begin(), vec.end(), _1 < 0.9f || _1 >= 1.0f, queue
- ),
- size_t(0)
- );
- }
- BOOST_AUTO_TEST_SUITE_END()
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