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_DETAIL_SERIAL_COUNT_IF_HPP
+#define BOOST_COMPUTE_ALGORITHM_DETAIL_SERIAL_COUNT_IF_HPP
+
+#include <iterator>
+
+#include <boost/compute/container/detail/scalar.hpp>
+#include <boost/compute/detail/meta_kernel.hpp>
+#include <boost/compute/detail/iterator_range_size.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+// counts values that match the predicate using a single thread
+template<class InputIterator, class Predicate>
+inline size_t serial_count_if(InputIterator first,
+                              InputIterator last,
+                              Predicate predicate,
+                              command_queue &queue)
+{
+    typedef typename std::iterator_traits<InputIterator>::value_type value_type;
+
+    const context &context = queue.get_context();
+    size_t size = iterator_range_size(first, last);
+
+    meta_kernel k("serial_count_if");
+    k.add_set_arg("size", static_cast<uint_>(size));
+    size_t result_arg = k.add_arg<uint_ *>(memory_object::global_memory, "result");
+
+    k <<
+        "uint count = 0;\n" <<
+        "for(uint i = 0; i < size; i++){\n" <<
+            k.decl<const value_type>("value") << "="
+                << first[k.var<uint_>("i")] << ";\n" <<
+            "if(" << predicate(k.var<const value_type>("value")) << "){\n" <<
+                "count++;\n" <<
+            "}\n"
+        "}\n"
+        "*result = count;\n";
+
+    kernel kernel = k.compile(context);
+
+    // setup result buffer
+    scalar<uint_> result(context);
+    kernel.set_arg(result_arg, result.get_buffer());
+
+    // run kernel
+    queue.enqueue_task(kernel);
+
+    // read index
+    return result.read(queue);
+}
+
+} // end detail namespace
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_DETAIL_SERIAL_COUNT_IF_HPP