FM / detail

/usr/include/boost/compute/algorithm/detail/

/usr/include/boost/compute/algorithm/detail

Name	Size	Mode	Actions
balanced_path.hpp	6267	0644	edit dl rm
binary_find.hpp	4626	0644	edit dl rm
compact.hpp	2188	0644	edit dl rm
copy_on_device.hpp	7382	0644	edit dl rm
copy_to_device.hpp	6731	0644	edit dl rm
copy_to_host.hpp	6658	0644	edit dl rm
count_if_with_ballot.hpp	2605	0644	edit dl rm
count_if_with_reduce.hpp	2648	0644	edit dl rm
count_if_with_threads.hpp	4241	0644	edit dl rm
find_extrema.hpp	2441	0644	edit dl rm
find_extrema_on_cpu.hpp	5333	0644	edit dl rm
find_extrema_with_atomics.hpp	4251	0644	edit dl rm
find_extrema_with_reduce.hpp	18672	0644	edit dl rm
find_if_with_atomics.hpp	8509	0644	edit dl rm
inplace_reduce.hpp	4839	0644	edit dl rm
insertion_sort.hpp	6030	0644	edit dl rm
merge_path.hpp	3874	0644	edit dl rm
merge_sort_on_cpu.hpp	14654	0644	edit dl rm
merge_sort_on_gpu.hpp	22093	0644	edit dl rm
merge_with_merge_path.hpp	7339	0644	edit dl rm
radix_sort.hpp	15502	0644	edit dl rm
random_fill.hpp	1880	0644	edit dl rm
reduce_by_key.hpp	5243	0644	edit dl rm
reduce_by_key_with_scan.hpp	23735	0644	edit dl rm
reduce_on_cpu.hpp	3949	0644	edit dl rm
reduce_on_gpu.hpp	10391	0644	edit dl rm
scan.hpp	1545	0644	edit dl rm
scan_on_cpu.hpp	7056	0644	edit dl rm
scan_on_gpu.hpp	11320	0644	edit dl rm
search_all.hpp	2579	0644	edit dl rm
serial_accumulate.hpp	1990	0644	edit dl rm
serial_count_if.hpp	2243	0644	edit dl rm
serial_find_extrema.hpp	3151	0644	edit dl rm
serial_merge.hpp	3504	0644	edit dl rm
serial_reduce.hpp	2145	0644	edit dl rm
serial_reduce_by_key.hpp	4240	0644	edit dl rm
serial_scan.hpp	3184	0644	edit dl rm

Edit: /usr/include/boost/compute/algorithm/detail/serial_find_extrema.hpp (3151B)

//---------------------------------------------------------------------------//
// 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_FIND_EXTREMA_HPP
#define BOOST_COMPUTE_ALGORITHM_DETAIL_SERIAL_FIND_EXTREMA_HPP

#include <boost/compute/command_queue.hpp>
#include <boost/compute/types/fundamental.hpp>
#include <boost/compute/detail/meta_kernel.hpp>
#include <boost/compute/detail/iterator_range_size.hpp>
#include <boost/compute/container/detail/scalar.hpp>

namespace boost {
namespace compute {
namespace detail {

template<class InputIterator, class Compare>
inline InputIterator serial_find_extrema(InputIterator first,
                                         InputIterator last,
                                         Compare compare,
                                         const bool find_minimum,
                                         command_queue &queue)
{
    typedef typename std::iterator_traits<InputIterator>::value_type value_type;
    typedef typename std::iterator_traits<InputIterator>::difference_type difference_type;

const context &context = queue.get_context();

meta_kernel k("serial_find_extrema");

k <<
        k.decl<value_type>("value") << " = " << first[k.expr<uint_>("0")] << ";\n" <<
        k.decl<uint_>("value_index") << " = 0;\n" <<
        "for(uint i = 1; i < size; i++){\n" <<
        "  " << k.decl<value_type>("candidate") << "="
             << first[k.expr<uint_>("i")] << ";\n" <<

"#ifndef BOOST_COMPUTE_FIND_MAXIMUM\n" <<
        "  if(" << compare(k.var<value_type>("candidate"),
                           k.var<value_type>("value")) << "){\n" <<
        "#else\n" <<
        "  if(" << compare(k.var<value_type>("value"),
                           k.var<value_type>("candidate")) << "){\n" <<
        "#endif\n" <<

"    value = candidate;\n" <<
        "    value_index = i;\n" <<
        "  }\n" <<
        "}\n" <<
        "*index = value_index;\n";

size_t index_arg_index = k.add_arg<uint_ *>(memory_object::global_memory, "index");
    size_t size_arg_index = k.add_arg<uint_>("size");

std::string options;
    if(!find_minimum){
        options = "-DBOOST_COMPUTE_FIND_MAXIMUM";
    }
    kernel kernel = k.compile(context, options);

// setup index buffer
    scalar<uint_> index(context);
    kernel.set_arg(index_arg_index, index.get_buffer());

// setup count
    size_t count = iterator_range_size(first, last);
    kernel.set_arg(size_arg_index, static_cast<uint_>(count));

// run kernel
    queue.enqueue_task(kernel);

// read index and return iterator
    return first + static_cast<difference_type>(index.read(queue));
}

} // end detail namespace
} // end compute namespace
} // end boost namespace

#endif // BOOST_COMPUTE_ALGORITHM_DETAIL_SERIAL_FIND_EXTREMA_HPP

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