add boost on mac

macx64/include/boost/compute/algorithm/scatter_if.hpp

@@ -0,0 +1,131 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2015 Jakub Pola <jakub.pola@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_SCATTER_IF_HPP
+#define BOOST_COMPUTE_ALGORITHM_SCATTER_IF_HPP
+
+#include <boost/static_assert.hpp>
+#include <boost/algorithm/string/replace.hpp>
+
+#include <boost/compute/system.hpp>
+#include <boost/compute/exception.hpp>
+#include <boost/compute/command_queue.hpp>
+#include <boost/compute/iterator/buffer_iterator.hpp>
+#include <boost/compute/type_traits/type_name.hpp>
+#include <boost/compute/detail/iterator_range_size.hpp>
+#include <boost/compute/detail/meta_kernel.hpp>
+#include <boost/compute/type_traits/is_device_iterator.hpp>
+
+namespace boost {
+namespace compute {
+namespace detail {
+
+template<class InputIterator, class MapIterator, class StencilIterator, class OutputIterator, class Predicate>
+class scatter_if_kernel : meta_kernel
+{
+public:
+    scatter_if_kernel() : meta_kernel("scatter_if")
+    {}
+
+    void set_range(InputIterator first,
+                   InputIterator last,
+                   MapIterator map,
+                   StencilIterator stencil,
+                   OutputIterator result,
+                   Predicate predicate)
+    {
+        m_count = iterator_range_size(first, last);
+        m_input_offset = first.get_index();
+        m_output_offset = result.get_index();
+
+        m_input_offset_arg = add_arg<uint_>("input_offset");
+        m_output_offset_arg = add_arg<uint_>("output_offset");
+
+        *this <<
+        "const uint i = get_global_id(0);\n" <<
+        "uint i1 = " << map[expr<uint_>("i")] <<
+        " + output_offset;\n" <<
+        "uint i2 = i + input_offset;\n" <<
+        if_(predicate(stencil[expr<uint_>("i")])) << "\n" <<
+            result[expr<uint_>("i1")] << "=" <<
+            first[expr<uint_>("i2")] << ";\n";
+    }
+
+    event exec(command_queue &queue)
+    {
+        if(m_count == 0) {
+            return event();
+        }
+
+        set_arg(m_input_offset_arg, uint_(m_input_offset));
+        set_arg(m_output_offset_arg, uint_(m_output_offset));
+
+        return exec_1d(queue, 0, m_count);
+    }
+
+private:
+    size_t m_count;
+    size_t m_input_offset;
+    size_t m_input_offset_arg;
+    size_t m_output_offset;
+    size_t m_output_offset_arg;
+};
+
+} // end detail namespace
+
+/// Copies the elements from the range [\p first, \p last) to the range
+/// beginning at \p result using the output indices from the range beginning
+/// at \p map if stencil is resolved to true. By default the predicate is
+/// an identity
+///
+/// Space complexity: \Omega(1)
+template<class InputIterator, class MapIterator, class StencilIterator, class OutputIterator,
+         class Predicate>
+inline void scatter_if(InputIterator first,
+                       InputIterator last,
+                       MapIterator map,
+                       StencilIterator stencil,
+                       OutputIterator result,
+                       Predicate predicate,
+                       command_queue &queue = system::default_queue())
+{
+    BOOST_STATIC_ASSERT(is_device_iterator<InputIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<MapIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<StencilIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<OutputIterator>::value);
+
+    detail::scatter_if_kernel<InputIterator, MapIterator, StencilIterator, OutputIterator, Predicate> kernel;
+
+    kernel.set_range(first, last, map, stencil, result, predicate);
+    kernel.exec(queue);
+}
+
+template<class InputIterator, class MapIterator, class StencilIterator, class OutputIterator>
+inline void scatter_if(InputIterator first,
+                       InputIterator last,
+                       MapIterator map,
+                       StencilIterator stencil,
+                       OutputIterator result,
+                       command_queue &queue = system::default_queue())
+{
+    BOOST_STATIC_ASSERT(is_device_iterator<InputIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<MapIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<StencilIterator>::value);
+    BOOST_STATIC_ASSERT(is_device_iterator<OutputIterator>::value);
+
+    typedef typename std::iterator_traits<StencilIterator>::value_type T;
+
+    scatter_if(first, last, map, stencil, result, identity<T>(), queue);
+}
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ALGORITHM_SCATTER_IF_HPP