ceph/src/boost/libs/compute/include/boost/compute/type_traits/vector_size.hpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013 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_TYPE_TRAITS_VECTOR_SIZE_HPP
  12 #define BOOST_COMPUTE_TYPE_TRAITS_VECTOR_SIZE_HPP
  13
  14 #include <boost/preprocessor/cat.hpp>
  15
  16 #include <boost/compute/types/fundamental.hpp>
  17
  18 namespace boost {
  19 namespace compute {
  20
  21 /// Meta-function returning the size (number of components) of a vector type
  22 /// \p T. For scalar types this function returns \c 1.
  23 ///
  24 /// For example,
  25 /// \code
  26 /// vector_size<float>::value == 1
  27 /// vector_size<float4_>::value == 4
  28 /// \endcode
  29 template<class T>
  30 struct vector_size
  31 {
  32     /// \internal_
  33     BOOST_STATIC_CONSTANT(size_t, value = 1);
  34 };
  35
  36 /// \internal_
  37 #define BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTION(scalar, size) \
  38     template<> \
  39     struct vector_size<BOOST_PP_CAT(BOOST_PP_CAT(scalar, size), _)> \
  40     { \
  41         BOOST_STATIC_CONSTANT(size_t, value = size); \
  42     };
  43
  44 /// \internal_
  45 #define BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(scalar) \
  46     BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTION(scalar, 2) \
  47     BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTION(scalar, 4) \
  48     BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTION(scalar, 8) \
  49     BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTION(scalar, 16)
  50
  51 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(char)
  52 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(uchar)
  53 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(short)
  54 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(ushort)
  55 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(int)
  56 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(uint)
  57 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(long)
  58 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(ulong)
  59 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(float)
  60 BOOST_COMPUTE_DECLARE_VECTOR_SIZE_FUNCTIONS(double)
  61
  62 } // end compute namespace
  63 } // end boost namespace
  64
  65 #endif // BOOST_COMPUTE_TYPE_TRAITS_VECTOR_SIZE_HPP