46 lines
1.4 KiB
C++
46 lines
1.4 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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#include <iostream>
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#include <vector>
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#include <boost/compute/system.hpp>
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#include <boost/compute/algorithm/reduce.hpp>
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#include <boost/compute/container/mapped_view.hpp>
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namespace compute = boost::compute;
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// this example demonstrates how to use the mapped_view class to map
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// an array of numbers to device memory and use the reduce() algorithm
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// to calculate the sum.
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int main()
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{
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// get default device and setup context
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compute::device gpu = compute::system::default_device();
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compute::context context(gpu);
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compute::command_queue queue(context, gpu);
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std::cout << "device: " << gpu.name() << std::endl;
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// create data on host
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int data[] = { 4, 2, 3, 7, 8, 9, 1, 6 };
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// create mapped view on device
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compute::mapped_view<int> view(data, 8, context);
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// use reduce() to calculate sum on the device
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int sum = 0;
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compute::reduce(view.begin(), view.end(), &sum, queue);
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// print the sum on the host
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std::cout << "sum: " << sum << std::endl;
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return 0;
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}
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