ViennaCL - The Vienna Computing Library: viennacl/ocl/utils.hpp Source File

ViennaCL - The Vienna Computing Library 1.7.1 Free open-source GPU-accelerated linear algebra and solver library. |

All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Pages
utils.hpp
Go to the documentation of this file.
1 #ifndef VIENNACL_OCL_UTILS_HPP_
2 #define VIENNACL_OCL_UTILS_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
25 #include <vector>
26 #include <string>
27 #include "viennacl/ocl/backend.hpp"
28 #include "viennacl/ocl/device.hpp"
29
30 namespace viennacl
31 {
32 namespace ocl
33 {
34
37 template<typename ScalarType>
38 struct DOUBLE_PRECISION_CHECKER
39 {
40 static void apply(viennacl::ocl::context const &) {}
41 };
42
44 template<>
45 struct DOUBLE_PRECISION_CHECKER<double>
46 {
47 static void apply(viennacl::ocl::context const & ctx)
48 {
49 if (!ctx.current_device().double_support())
50 throw viennacl::ocl::double_precision_not_provided_error();
51 }
52 };
56 template<typename T>
57 struct type_to_string;
58
60 template<> struct type_to_string<char> { static std::string apply() { return "char"; } };
61 template<> struct type_to_string<short> { static std::string apply() { return "short"; } };
62 template<> struct type_to_string<int> { static std::string apply() { return "int"; } };
63 template<> struct type_to_string<long> { static std::string apply() { return "long"; } };
64
65 template<> struct type_to_string<unsigned char> { static std::string apply() { return "uchar"; } };
66 template<> struct type_to_string<unsigned short> { static std::string apply() { return "ushort"; } };
67 template<> struct type_to_string<unsigned int> { static std::string apply() { return "uint"; } };
68 template<> struct type_to_string<unsigned long> { static std::string apply() { return "ulong"; } };
69
70 template<> struct type_to_string<float> { static std::string apply() { return "float"; } };
71 template<> struct type_to_string<double> { static std::string apply() { return "double"; } };
74 template<typename T>
75 void append_double_precision_pragma(viennacl::ocl::context const & /*ctx*/, std::string & /*source*/) {}
76
77 template<>
78 inline void append_double_precision_pragma<double>(viennacl::ocl::context const & ctx, std::string & source)
79 {
80 source.append("#pragma OPENCL EXTENSION " + ctx.current_device().double_support_extension() + " : enable\n\n");
81 }
82
83 } //ocl
84 } //viennacl
85 #endif
viennacl::ocl::context::current_device
viennacl::ocl::device const & current_device() const
Returns the current device.
Definition: context.hpp:112
device.hpp
Represents an OpenCL device within ViennaCL.
viennacl::ocl::append_double_precision_pragma< double >
void append_double_precision_pragma< double >(viennacl::ocl::context const &ctx, std::string &source)
Definition: utils.hpp:78
viennacl::ocl::context
Manages an OpenCL context and provides the respective convenience functions for creating buffers...
Definition: context.hpp:55
viennacl::ocl::append_double_precision_pragma
void append_double_precision_pragma(viennacl::ocl::context const &, std::string &)
Definition: utils.hpp:75
viennacl::ocl::DOUBLE_PRECISION_CHECKER::apply
static void apply(viennacl::ocl::context const &)
Definition: utils.hpp:40
viennacl::ocl::DOUBLE_PRECISION_CHECKER
Ensures that double precision types are only allocated if it is supported by the device. If double precision is requested for a device not capable of providing that, a double_precision_not_provided_error is thrown.
Definition: utils.hpp:38
viennacl::ocl::double_precision_not_provided_error
Exception thrown if the user wants to use double precision arithmetics, but the device does not suppo...
Definition: error.hpp:573
viennacl::ocl::device::double_support
bool double_support() const
ViennaCL convenience function: Returns true if the device supports double precision.
Definition: device.hpp:956
backend.hpp
Implementations of the OpenCL backend, where all contexts are stored in.
viennacl::ocl::device::double_support_extension
std::string double_support_extension() const
ViennaCL convenience function: Returns the device extension which enables double precision (usually c...
Definition: device.hpp:967
viennacl::linalg::opencl::kernels::detail::type_to_string
std::string type_to_string(viennacl::row_major)
Definition: matrix.hpp:917
viennacl::ocl::type_to_string
Helper class for converting a type to its string representation.
Definition: utils.hpp:57