ceph/src/boost/libs/compute/include/boost/compute/interop/eigen/core.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #ifndef BOOST_COMPUTE_INTEROP_EIGEN_EIGEN_HPP
  12 #define BOOST_COMPUTE_INTEROP_EIGEN_EIGEN_HPP
  13
  14 #include <Eigen/Core>
  15
  16 #include <boost/compute/command_queue.hpp>
  17 #include <boost/compute/algorithm/copy_n.hpp>
  18 #include <boost/compute/iterator/buffer_iterator.hpp>
  19 #include <boost/compute/type_traits/type_name.hpp>
  20
  21 namespace boost {
  22 namespace compute {
  23
  24 /// Copies \p matrix to \p buffer.
  25 template<class Derived>
  26 inline void eigen_copy_matrix_to_buffer(const Eigen::PlainObjectBase<Derived> &matrix,
  27                                         buffer_iterator<typename Derived::Scalar> buffer,
  28                                         command_queue &queue = system::default_queue())
  29 {
  30     ::boost::compute::copy_n(matrix.data(), matrix.size(), buffer, queue);
  31 }
  32
  33 /// Copies \p buffer to \p matrix.
  34 template<class Derived>
  35 inline void eigen_copy_buffer_to_matrix(const buffer_iterator<typename Derived::Scalar> buffer,
  36                                         Eigen::PlainObjectBase<Derived> &matrix,
  37                                         command_queue &queue = system::default_queue())
  38 {
  39     ::boost::compute::copy_n(buffer, matrix.size(), matrix.data(), queue);
  40 }
  41
  42 /// Converts an \c Eigen::Matrix4f to a \c float16_.
  43 inline float16_ eigen_matrix4f_to_float16(const Eigen::Matrix4f &matrix)
  44 {
  45     float16_ result;
  46     std::memcpy(&result, matrix.data(), 16 * sizeof(float));
  47     return result;
  48 }
  49
  50 /// Converts an \c Eigen::Matrix4d to a \c double16_.
  51 inline double16_ eigen_matrix4d_to_double16(const Eigen::Matrix4d &matrix)
  52 {
  53     double16_ result;
  54     std::memcpy(&result, matrix.data(), 16 * sizeof(double));
  55     return result;
  56 }
  57
  58 } // end compute namespace
  59 } // end boost namespace
  60
  61 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector2i, int2)
  62 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector4i, int4)
  63 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector2f, float2)
  64 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector4f, float4)
  65 BOOST_COMPUTE_TYPE_NAME(Eigen::Matrix2f, float8)
  66 BOOST_COMPUTE_TYPE_NAME(Eigen::Matrix4f, float16)
  67 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector2d, double2)
  68 BOOST_COMPUTE_TYPE_NAME(Eigen::Vector4d, double4)
  69 BOOST_COMPUTE_TYPE_NAME(Eigen::Matrix2d, double8)
  70 BOOST_COMPUTE_TYPE_NAME(Eigen::Matrix4d, double16)
  71
  72 #endif // BOOST_COMPUTE_INTEROP_EIGEN_EIGEN_HPP