gemm.hpp
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1 //===========================================================================
2 /*!
3  *
4  *
5  * \brief -
6  *
7  * \author O. Krause
8  * \date 2017
9  *
10  *
11  * \par Copyright 1995-2015 Shark Development Team
12  *
13  * <BR><HR>
14  * This file is part of Shark.
15  * <http://image.diku.dk/shark/>
16  *
17  * Shark is free software: you can redistribute it and/or modify
18  * it under the terms of the GNU Lesser General Public License as published
19  * by the Free Software Foundation, either version 3 of the License, or
20  * (at your option) any later version.
21  *
22  * Shark is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25  * GNU Lesser General Public License for more details.
26  *
27  * You should have received a copy of the GNU Lesser General Public License
28  * along with Shark. If not, see <http://www.gnu.org/licenses/>.
29  *
30  */
31 //===========================================================================
32 #ifndef REMORA_KERNELS_CLBLAST_GEMM_HPP
33 #define REMORA_KERNELS_CLBLAST_GEMM_HPP
34 
35 #include "../../expression_types.hpp"
36 #include "../../detail/traits.hpp"
37 #include <clblast.h>
38 namespace remora{ namespace kernels{
39 
40 // C <- alpha * A * B + beta * C
41 template <typename MatA, typename MatB, typename MatC>
42 void gemm(
43  matrix_expression<MatA, gpu_tag> const& A,
44  matrix_expression<MatB, gpu_tag> const& B,
45  matrix_expression<MatC, gpu_tag>& C,
46  typename MatC::value_type const& alpha
47 ) {
48  REMORA_SIZE_CHECK(A().size1() == C().size1());
49  REMORA_SIZE_CHECK(B().size2() == C().size2());
50  REMORA_SIZE_CHECK(A().size2()== B().size1());
51 
52  static_assert(std::is_same<typename MatA::value_type, typename MatC::value_type>::value, "[gemm] Arguments do not have same element type");
53  static_assert(std::is_same<typename MatA::value_type, typename MatB::value_type>::value, "[gemm] Arguments do not have same element type");
54  static_assert(std::is_same<typename MatA::evaluation_category::tag, dense_tag>::value, "[gemm] A is not dense");
55  static_assert(std::is_same<typename MatB::evaluation_category::tag, dense_tag>::value, "[gemm] B is not dense");
56  static_assert(std::is_base_of<dense_tag, typename MatC::storage_type::storage_tag>::value, "[gemm] C does not have dense storage layout");
57 
58  //pre-evaluate A and B into a temporary if necessary
59  auto const& Aeval = eval_expression(A);
60  auto const& Beval = eval_expression(B);
61 
62  using namespace clblast;
63 
64  //obtain geometry information
65  auto transA = std::is_same<typename MatA::orientation,typename MatC::orientation>::value? Transpose::kNo : Transpose::kYes;
66  auto transB = std::is_same<typename MatB::orientation,typename MatC::orientation>::value? Transpose::kNo : Transpose::kYes;
67  auto layout = std::is_same<typename MatC::orientation::orientation, row_major>::value? Layout::kRowMajor: Layout::kColMajor;
68  std::size_t m = C().size1();
69  std::size_t n = C().size2();
70  std::size_t k = A().size2();
71 
72  //obtain matrix storage
73  auto storageA = Aeval.raw_storage();
74  auto storageB = Beval.raw_storage();
75  auto storageC = C().raw_storage();
76 
77  //call
78  cl_event* event = nullptr;//todo: store events for out-of-order queues
79  auto code = Gemm(layout, transA, transB,
80  m, n , k,
81  alpha,
82  storageA.buffer.get(), storageA.offset, storageA.leading_dimension,
83  storageB.buffer.get(), storageB.offset, storageB.leading_dimension,
84  typename MatC::value_type(1),
85  storageC.buffer.get(), storageC.offset, storageC.leading_dimension,
86  &C().queue().get(), event);
87 
88  assert(code == StatusCode::kSuccess);
89 }
90 
91 }}
92 
93 #endif