ViennaCL - The Vienna Computing Library: viennacl/linalg/opencl/kernels/nmf.hpp Source File

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nmf.hpp
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1 #ifndef VIENNACL_LINALG_OPENCL_KERNELS_NMF_HPP
2 #define VIENNACL_LINALG_OPENCL_KERNELS_NMF_HPP
3
4 /* =========================================================================
5 Copyright (c) 2010-2016, Institute for Microelectronics,
6 Institute for Analysis and Scientific Computing,
7 TU Wien.
8 Portions of this software are copyright by UChicago Argonne, LLC.
9
10 -----------------
11 ViennaCL - The Vienna Computing Library
12 -----------------
13
14 Project Head: Karl Rupp rupp@iue.tuwien.ac.at
15
16 (A list of authors and contributors can be found in the manual)
17
18 License: MIT (X11), see file LICENSE in the base directory
19 ============================================================================= */
20
21 #include "viennacl/tools/tools.hpp"
22 #include "viennacl/ocl/kernel.hpp"
23 #include "viennacl/ocl/platform.hpp"
24 #include "viennacl/ocl/utils.hpp"
25
28 namespace viennacl
29 {
30 namespace linalg
31 {
32 namespace opencl
33 {
34 namespace kernels
35 {
36
37 template<typename StringT>
38 void generate_nmf_el_wise_mul_div(StringT & source, std::string const & numeric_string)
39 {
40 source.append("__kernel void el_wise_mul_div( \n");
41 source.append(" __global "); source.append(numeric_string); source.append(" * matrix1, \n");
42 source.append(" __global const "); source.append(numeric_string); source.append(" * matrix2, \n");
43 source.append(" __global const "); source.append(numeric_string); source.append(" * matrix3, \n");
44 source.append(" unsigned int size) \n");
45 source.append("{ \n");
46 source.append(" for (unsigned int i = get_global_id(0); i < size; i += get_global_size(0)) \n");
47 source.append(" { \n");
48 source.append(" "); source.append(numeric_string); source.append(" val = matrix1[i] * matrix2[i]; \n");
49 source.append(" "); source.append(numeric_string); source.append(" divisor = matrix3[i]; \n");
50 source.append(" matrix1[i] = (divisor > ("); source.append(numeric_string); source.append(")0.00001) ? (val / divisor) : ("); source.append(numeric_string); source.append(")0; \n");
51 source.append(" } \n");
52 source.append("} \n");
53 }
54
55 // main kernel class
57 template<typename NumericT>
58 struct nmf
59 {
60 static std::string program_name()
61 {
62 return viennacl::ocl::type_to_string<NumericT>::apply() + "_nmf";
63 }
64
65 static void init(viennacl::ocl::context & ctx)
66 {
67 static std::map<cl_context, bool> init_done;
68 if (!init_done[ctx.handle().get()])
69 {
70 viennacl::ocl::DOUBLE_PRECISION_CHECKER<NumericT>::apply(ctx);
71 std::string numeric_string = viennacl::ocl::type_to_string<NumericT>::apply();
72
73 std::string source;
74 source.reserve(8192);
75
76 viennacl::ocl::append_double_precision_pragma<NumericT>(ctx, source);
77
78 // only generate for floating points (forces error for integers)
79 if (numeric_string == "float" || numeric_string == "double")
80 {
81 generate_nmf_el_wise_mul_div(source, numeric_string);
82 }
83
84 std::string prog_name = program_name();
85 #ifdef VIENNACL_BUILD_INFO
86 std::cout << "Creating program " << prog_name << std::endl;
87 #endif
88 ctx.add_program(source, prog_name);
89 init_done[ctx.handle().get()] = true;
90 } //if
91 } //init
92 };
93
94 } // namespace kernels
95 } // namespace opencl
96 } // namespace linalg
97 } // namespace viennacl
98 #endif
99
platform.hpp
Implements a OpenCL platform within ViennaCL.
viennacl::linalg::opencl::kernels::generate_nmf_el_wise_mul_div
void generate_nmf_el_wise_mul_div(StringT &source, std::string const &numeric_string)
Definition: nmf.hpp:38
tools.hpp
Various little tools used here and there in ViennaCL.
viennacl::ocl::context
Manages an OpenCL context and provides the respective convenience functions for creating buffers...
Definition: context.hpp:55
utils.hpp
Provides OpenCL-related utilities.
viennacl::ocl::context::handle
const viennacl::ocl::handle< cl_context > & handle() const
Returns the context handle.
Definition: context.hpp:611
viennacl::linalg::opencl::kernels::nmf::program_name
static std::string program_name()
Definition: nmf.hpp:60
viennacl::ocl::DOUBLE_PRECISION_CHECKER::apply
static void apply(viennacl::ocl::context const &)
Definition: utils.hpp:40
viennacl::ocl::handle::get
const OCL_TYPE & get() const
Definition: handle.hpp:191
viennacl::linalg::opencl::kernels::nmf
Main kernel class for generating OpenCL kernels for nonnegative matrix factorization of a dense matri...
Definition: nmf.hpp:58
kernel.hpp
Representation of an OpenCL kernel in ViennaCL.
viennacl::linalg::opencl::kernels::nmf::init
static void init(viennacl::ocl::context &ctx)
Definition: nmf.hpp:65
viennacl::ocl::type_to_string
Helper class for converting a type to its string representation.
Definition: utils.hpp:57