simd.hpp
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1 /*!
2  *
3  *
4  * \brief Some Macros and basic definitions for the use of SIMD block storage
5  *
6  * \author O. Krause
7  * \date 2016
8  *
9  *
10  * \par Copyright 1995-2015 Shark Development Team
11  *
12  * <BR><HR>
13  * This file is part of Shark.
14  * <http://image.diku.dk/shark/>
15  *
16  * Shark is free software: you can redistribute it and/or modify
17  * it under the terms of the GNU Lesser General Public License as published
18  * by the Free Software Foundation, either version 3 of the License, or
19  * (at your option) any later version.
20  *
21  * Shark is distributed in the hope that it will be useful,
22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24  * GNU Lesser General Public License for more details.
25  *
26  * You should have received a copy of the GNU Lesser General Public License
27  * along with Shark. If not, see <http://www.gnu.org/licenses/>.
28  *
29  */
30 
31 #ifndef REMORA_KERNELS_DEFAULT_SIMD_HPP
32 #define REMORA_KERNELS_DEFAULT_SIMD_HPP
33 
34 #include <boost/version.hpp>
35 #include <cstddef>
36 
37 //older boost versions have some issues
38  #if (BOOST_VERSION >= 106300)
39  #include <boost/align/assume_aligned.hpp>
40  #include <boost/align/aligned_allocator.hpp>
41 #else//subset of boost/align 1.63
42  #include "boost_align/assume_aligned.hpp"
43  #include "boost_align/aligned_allocator.hpp"
44 #endif
45 
46 
47 
48 
49 #ifdef __AVX__
50  #define REMORA_VECTOR_LENGTH 32
51 #else
52  #define REMORA_VECTOR_LENGTH 16
53 #endif
54 
55 namespace remora{namespace bindings{namespace detail{
56 template<class T>
57 struct block{
58  static const std::size_t max_vector_elements = REMORA_VECTOR_LENGTH/sizeof(T);
59  #ifdef REMORA_USE_SIMD
60  static const std::size_t vector_elements = REMORA_VECTOR_LENGTH/sizeof(T);
61  #ifdef BOOST_COMP_CLANG_DETECTION
62  typedef T type __attribute__((ext_vector_type (vector_elements)));
63  #else
64  typedef T type __attribute__((vector_size (REMORA_VECTOR_LENGTH)));
65  #endif
66  #else
67  static const std::size_t vector_elements = 1;
68  typedef T type;
69  #endif
70  static const std::size_t align = 64;
71 };
72 }}}
73 #endif