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Library/boost/libs/compute/example/transform_sqrt.cpp
58 строк
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19 дек 2024, 19:11
19 дек 2024, 19:11
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//---------------------------------------------------------------------------// // Copyright (c) 2013 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. //---------------------------------------------------------------------------// //[transform_sqrt_example #include <vector> #include <algorithm> #include <boost/compute/algorithm/transform.hpp> #include <boost/compute/container/vector.hpp> #include <boost/compute/functional/math.hpp> namespace compute = boost::compute; int main() { // get default device and setup context compute::device device = compute::system::default_device(); compute::context context(device); compute::command_queue queue(context, device); // generate random data on the host std::vector<float> host_vector(10000); std::generate(host_vector.begin(), host_vector.end(), rand); // create a vector on the device compute::vector<float> device_vector(host_vector.size(), context); // transfer data from the host to the device compute::copy( host_vector.begin(), host_vector.end(), device_vector.begin(), queue ); // calculate the square-root of each element in-place compute::transform( device_vector.begin(), device_vector.end(), device_vector.begin(), compute::sqrt<float>(), queue ); // copy values back to the host compute::copy( device_vector.begin(), device_vector.end(), host_vector.begin(), queue ); return 0; } //]