1 //
2 // Copyright 2021 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 // cl_utils.cpp: Helper functions for the CL back end
7
8 #include "libANGLE/renderer/cl/cl_util.h"
9
10 #include "libANGLE/Debug.h"
11
12 #include <cstdlib>
13
14 namespace rx
15 {
16
ExtractCLVersion(const std::string & version)17 cl_version ExtractCLVersion(const std::string &version)
18 {
19 const std::string::size_type spacePos = version.find(' ');
20 const std::string::size_type dotPos = version.find('.');
21 if (spacePos == std::string::npos || dotPos == std::string::npos)
22 {
23 ERR() << "Failed to extract version from OpenCL version string: " << version;
24 return 0u;
25 }
26
27 const long major = std::strtol(&version[spacePos + 1u], nullptr, 10);
28 const long minor = std::strtol(&version[dotPos + 1u], nullptr, 10);
29 if (major < 1 || major > 9 || minor < 0 || minor > 9)
30 {
31 ERR() << "Failed to extract version from OpenCL version string: " << version;
32 return 0u;
33 }
34 return CL_MAKE_VERSION(static_cast<cl_uint>(major), static_cast<cl_uint>(minor), 0);
35 }
36
RemoveUnsupportedCLExtensions(std::string & extensions)37 void RemoveUnsupportedCLExtensions(std::string &extensions)
38 {
39 if (extensions.empty())
40 {
41 return;
42 }
43 using SizeT = std::string::size_type;
44 SizeT extStart = 0u;
45 SizeT spacePos = extensions.find(' ');
46
47 // Remove all unsupported extensions which are terminated by a space
48 while (spacePos != std::string::npos)
49 {
50 const SizeT length = spacePos - extStart;
51 if (IsCLExtensionSupported(extensions.substr(extStart, length)))
52 {
53 extStart = spacePos + 1u;
54 }
55 else
56 {
57 extensions.erase(extStart, length + 1u);
58 }
59 spacePos = extensions.find(' ', extStart);
60 }
61
62 // Remove last extension in string, if exists and unsupported
63 if (extStart < extensions.length())
64 {
65 const SizeT length = extensions.length() - extStart;
66 if (!IsCLExtensionSupported(extensions.substr(extStart, length)))
67 {
68 extensions.erase(extStart, length);
69 }
70 }
71
72 // Remove trailing spaces
73 while (!extensions.empty() && extensions.back() == ' ')
74 {
75 extensions.pop_back();
76 }
77 }
78
RemoveUnsupportedCLExtensions(NameVersionVector & extensions)79 void RemoveUnsupportedCLExtensions(NameVersionVector &extensions)
80 {
81 auto extIt = extensions.cbegin();
82 while (extIt != extensions.cend())
83 {
84 if (IsCLExtensionSupported(extIt->name))
85 {
86 ++extIt;
87 }
88 else
89 {
90 extIt = extensions.erase(extIt);
91 }
92 }
93 }
94
95 } // namespace rx
96