Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
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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.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_ALGORITHM_INNER_PRODUCT_HPP
+#define BOOST_COMPUTE_ALGORITHM_INNER_PRODUCT_HPP
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/functional.hpp>
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/algorithm/accumulate.hpp>
+#include <boost/compute/container/vector.hpp>
+#include <boost/compute/iterator/transform_iterator.hpp>
+#include <boost/compute/iterator/zip_iterator.hpp>
+#include <boost/compute/functional/detail/unpack.hpp>
+
+namespace boost {
+namespace compute {
+
+/// Returns the inner product of the elements in the range
+/// [\p first1, \p last1) with the elements in the range beginning
+/// at \p first2.
+template<class InputIterator1, class InputIterator2, class T>
+inline T inner_product(InputIterator1 first1,
+                       InputIterator1 last1,
+                       InputIterator2 first2,
+                       T init,
+                       command_queue &queue = system::default_queue())
+{
+    typedef typename std::iterator_traits<InputIterator1>::value_type input_type;
+
+    ptrdiff_t n = std::distance(first1, last1);
+
+    return ::boost::compute::accumulate(
+        ::boost::compute::make_transform_iterator(
+            ::boost::compute::make_zip_iterator(
+                boost::make_tuple(first1, first2)
+            ),
+            detail::unpack(multiplies<input_type>())
+        ),
+        ::boost::compute::make_transform_iterator(
+            ::boost::compute::make_zip_iterator(
+                boost::make_tuple(last1, first2 + n)
+            ),
+            detail::unpack(multiplies<input_type>())
+        ),
+        init,
+        queue
+    );
+}
+
+/// \overload
+template<class InputIterator1,
+         class InputIterator2,
+         class T,
+         class BinaryAccumulateFunction,
+         class BinaryTransformFunction>
+inline T inner_product(InputIterator1 first1,
+                       InputIterator1 last1,
+                       InputIterator2 first2,
+                       T init,
+                       BinaryAccumulateFunction accumulate_function,
+                       BinaryTransformFunction transform_function,
+                       command_queue &queue = system::default_queue())
+{
+    typedef typename std::iterator_traits<InputIterator1>::value_type value_type;
+
+    size_t count = detail::iterator_range_size(first1, last1);
+    vector<value_type> result(count, queue.get_context());
+    transform(first1,
+              last1,
+              first2,
+              result.begin(),
+              transform_function,
+              queue);
+
+    return ::boost::compute::accumulate(result.begin(),
+                                        result.end(),
+                                        init,
+                                        accumulate_function,
+                                        queue);
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_INNER_PRODUCT_HPP