FM / functional

/usr/include/boost/compute/functional

Name	Size	Mode	Actions
detail/	-	0755	rm
as.hpp	1200	0644	edit dl rm
atomic.hpp	2949	0644	edit dl rm
bind.hpp	7230	0644	edit dl rm
common.hpp	1117	0644	edit dl rm
convert.hpp	1230	0644	edit dl rm
field.hpp	2097	0644	edit dl rm
geometry.hpp	1447	0644	edit dl rm
get.hpp	1883	0644	edit dl rm
hash.hpp	2573	0644	edit dl rm
identity.hpp	1553	0644	edit dl rm
integer.hpp	1176	0644	edit dl rm
logical.hpp	4723	0644	edit dl rm
math.hpp	4281	0644	edit dl rm
operator.hpp	3073	0644	edit dl rm
popcount.hpp	1802	0644	edit dl rm
relational.hpp	1983	0644	edit dl rm

Edit: /usr/include/boost/compute/functional/popcount.hpp (1802B)

//---------------------------------------------------------------------------//
// Copyright (c) 2013-2014 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_FUNCTIONAL_POPCOUNT_HPP
#define BOOST_COMPUTE_FUNCTIONAL_POPCOUNT_HPP

#include <boost/compute/function.hpp>
#include <boost/compute/type_traits/type_name.hpp>

namespace boost {
namespace compute {

/// Returns the number of non-zero bits in \p x.
///
/// \see_opencl_ref{popcount}
template<class T>
class popcount : public function<T(T)>
{
public:
    popcount()
        : function<T(T)>("boost_popcount")
    {
        std::stringstream s;
        s << "inline " << type_name<T>() << " boost_popcount"
          << "(const " << type_name<T>() << " x)\n"
          << "{\n"
          // use built-in popcount if opencl 1.2 is supported
          << "#if __OPENCL_VERSION__ >= 120\n"
          << "    return popcount(x);\n"
          // fallback to generic popcount() implementation
          << "#else\n"
          << "    " << type_name<T>() << " count = 0;\n"
          << "    for(" << type_name<T>() << " i = 0; i < sizeof(i) * CHAR_BIT; i++){\n"
          << "        if(x & (" << type_name<T>() << ") 1 << i){\n"
          << "            count++;\n"
          << "        }\n"
          << "    }\n"
          << "    return count;\n"
          << "#endif\n"
          << "}\n";
        this->set_source(s.str());
    }
};

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

#endif // BOOST_COMPUTE_FUNCTIONAL_POPCOUNT_HPP

//---------------------------------------------------------------------------// // Copyright (c) 2013-2014 Kyle Lutz // // 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_FUNCTIONAL_POPCOUNT_HPP #define BOOST_COMPUTE_FUNCTIONAL_POPCOUNT_HPP #include #include namespace boost { namespace compute { /// Returns the number of non-zero bits in \p x. /// /// \see_opencl_ref{popcount} template class popcount : public function { public: popcount() : function("boost_popcount") { std::stringstream s; s << "inline " << type_name() << " boost_popcount" << "(const " << type_name() << " x)\n" << "{\n" // use built-in popcount if opencl 1.2 is supported << "#if __OPENCL_VERSION__ >= 120\n" << " return popcount(x);\n" // fallback to generic popcount() implementation << "#else\n" << " " << type_name() << " count = 0;\n" << " for(" << type_name() << " i = 0; i < sizeof(i) * CHAR_BIT; i++){\n" << " if(x & (" << type_name() << ") 1 << i){\n" << " count++;\n" << " }\n" << " }\n" << " return count;\n" << "#endif\n" << "}\n"; this->set_source(s.str()); } }; } // end compute namespace } // end boost namespace #endif // BOOST_COMPUTE_FUNCTIONAL_POPCOUNT_HPP