55bea58790
New test checks if values generated by uniform real distribution are in the [a,b) interval.
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
//---------------------------------------------------------------------------//
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// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#define BOOST_TEST_MODULE TestUniformRealDistribution
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#include <boost/test/unit_test.hpp>
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#include <boost/compute/system.hpp>
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#include <boost/compute/command_queue.hpp>
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#include <boost/compute/algorithm/count_if.hpp>
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#include <boost/compute/algorithm/transform.hpp>
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#include <boost/compute/function.hpp>
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#include <boost/compute/container/vector.hpp>
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#include <boost/compute/random/default_random_engine.hpp>
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#include <boost/compute/random/uniform_real_distribution.hpp>
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#include <boost/compute/lambda.hpp>
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#include <boost/compute/types/fundamental.hpp>
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#include "context_setup.hpp"
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BOOST_AUTO_TEST_CASE(uniform_real_distribution_doctest)
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{
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using boost::compute::lambda::_1;
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boost::compute::vector<float> vec(128, context);
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//! [generate]
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// initialize the default random engine
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boost::compute::default_random_engine engine(queue);
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// setup the uniform distribution to produce floats between 1 and 100
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boost::compute::uniform_real_distribution<float> distribution(1.0f, 100.0f);
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// generate the random values and store them to 'vec'
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distribution.generate(vec.begin(), vec.end(), engine, queue);
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//! [generate]
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BOOST_CHECK_EQUAL(
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boost::compute::count_if(
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vec.begin(), vec.end(), _1 < 1.0f || _1 >= 100.0f, queue
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),
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size_t(0)
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);
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}
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template<class T>
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class range_test_engine
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{
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public:
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explicit range_test_engine(boost::compute::command_queue &queue) {
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(void) queue;
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}
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template<class OutputIterator, class Function>
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void generate(OutputIterator first, OutputIterator last, Function op, boost::compute::command_queue &queue)
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{
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boost::compute::vector<T> tmp(std::distance(first, last), queue.get_context());
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BOOST_COMPUTE_FUNCTION(T, max_random, (const T x),
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{
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if(get_global_id(0) < 1)
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return (ValueType) MAX_RANDOM;
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else
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return (ValueType) 0;
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});
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max_random.define("MAX_RANDOM", "UINT_MAX");
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max_random.define("ValueType", boost::compute::type_name<T>());
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boost::compute::transform(tmp.begin(), tmp.end(), tmp.begin(), max_random, queue);
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boost::compute::transform(tmp.begin(), tmp.end(), first, op, queue);
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}
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};
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// For checking if result is in the correct range [low, hi)
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BOOST_AUTO_TEST_CASE(uniform_real_distribution_range)
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{
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using boost::compute::lambda::_1;
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boost::compute::vector<float> vec(32, context);
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// initialize the range_test_engine
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range_test_engine<boost::compute::uint_> engine(queue);
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// setup the uniform distribution to produce floats between 0.9 and 1.0
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boost::compute::uniform_real_distribution<float> distribution(0.9f, 1.0f);
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// generate the random values and store them to 'vec'
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distribution.generate(vec.begin(), vec.end(), engine, queue);
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BOOST_CHECK_EQUAL(
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boost::compute::count_if(
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vec.begin(), vec.end(), _1 < 0.9f || _1 >= 1.0f, queue
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),
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size_t(0)
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);
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}
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BOOST_AUTO_TEST_SUITE_END()
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