Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
@@ -0,0 +1,70 @@
+//---------------------------------------------------------------------------//
+// 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_DETAIL_FIND_EXTREMA_HPP
+#define BOOST_COMPUTE_ALGORITHM_DETAIL_FIND_EXTREMA_HPP
+
+#include <boost/compute/detail/iterator_range_size.hpp>
+#include <boost/compute/algorithm/detail/find_extrema_on_cpu.hpp>
+#include <boost/compute/algorithm/detail/find_extrema_with_reduce.hpp>
+#include <boost/compute/algorithm/detail/find_extrema_with_atomics.hpp>
+#include <boost/compute/algorithm/detail/serial_find_extrema.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+template<class InputIterator, class Compare>
+inline InputIterator find_extrema(InputIterator first,
+                                  InputIterator last,
+                                  Compare compare,
+                                  const bool find_minimum,
+                                  command_queue &queue)
+{
+    size_t count = iterator_range_size(first, last);
+
+    // handle trivial cases
+    if(count == 0 || count == 1){
+        return first;
+    }
+
+    const device &device = queue.get_device();
+
+    // CPU
+    if(device.type() & device::cpu) {
+        return find_extrema_on_cpu(first, last, compare, find_minimum, queue);
+    }
+
+    // GPU
+    // use serial method for small inputs
+    if(count < 512)
+    {
+        return serial_find_extrema(first, last, compare, find_minimum, queue);
+    }
+    // find_extrema_with_reduce() is used only if requirements are met
+    if(find_extrema_with_reduce_requirements_met(first, last, queue))
+    {
+        return find_extrema_with_reduce(first, last, compare, find_minimum, queue);
+    }
+
+    // use serial method for OpenCL version 1.0 due to
+    // problems with atomic_cmpxchg()
+    #ifndef CL_VERSION_1_1
+        return serial_find_extrema(first, last, compare, find_minimum, queue);
+    #endif
+
+    return find_extrema_with_atomics(first, last, compare, find_minimum, queue);
+}
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_DETAIL_FIND_EXTREMA_HPP