1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* MELTOPENGPU: runtime support for calls to OpenCL code generated by
GCC MELT
Copyright (C) 2010
Free Software Foundation, Inc.
Contributed by Basile Starynkevitch <basile@starynkevitch.net>
[funded within OpenGPU french project: http://opengpu.net/ ]
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/***
This runtime wraps OpenCL runtime library calls into something
simpler. Every variable or function defined here has the
meltopengpu_ prefix. Variables with meltopengpu_ are read only
from the application, unless specified otherwise. Most of them
are internal to this runtime, and need not to be queried at all by
explicit user code.
I am compiling this with
gcc -O -Wall -fPIC -shared meltopengpu-runtime.c -lOpenCL -o libmeltopengpu.so
****/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
/* this is the usual opencl header, provided by the OpenCL
vendor... */
#include <CL/cl.h>
/* Set to one if the library has been initialized. Read-only for user application code. */
int meltopengpu_is_initialized;
/* Signature of the error routine. */
typedef void (meltopengpu_error_routine_t) (const char*);
/* The OpenCL plateform identifier, and the number of them (0 or
1)! */
static cl_platform_id meltopengpu_platform;
static cl_uint meltopengpu_num_platforms;
/* The OpenCL GPU device. */
static cl_device_id meltopengpu_device;
static cl_uint meltopengpu_num_devices;
/* The OpenCL context. */
static cl_context meltopengpu_context;
/* The OpenCL command queue. */
static cl_command_queue meltopengpu_command_queue;
/* The pointer to the error routine. */
static meltopengpu_error_routine_t* meltopengpu_error_fun;
/* Our internal fatal error routine. */
static void meltopengpu_fatal_printf (const char*fmt, ...)
__attribute__((format(printf,1,2)))
__attribute__((noreturn));
static void meltopengpu_fatal_printf (const char*fmt, ...)
{
static char errbuf[512];
va_list args;
memset (errbuf, 0, sizeof(errbuf));
va_start(args, fmt);
vsnprintf(errbuf, sizeof(errbuf)-1, fmt, args);
va_end (args);
if (meltopengpu_error_fun)
meltopengpu_error_fun (errbuf);
else {
fputs (errbuf, stderr);
putc('\n', stderr);
fflush (stderr);
}
abort ();
}
/* This initialization code should be called by the user application,
at the very beginning. If the user did not call that function
explicitly, nothing specific to MELT OPENGPU happens, and no code
runs on the GPU. The argument is a fatal error routine function
pointer or null; if null, any error spits a message to stderr and
abort()-s */
void meltopengpu_initialize (meltopengpu_error_routine_t erh)
{
cl_int got = CL_SUCCESS;
if (erh)
meltopengpu_error_fun = erh;
/* Get the platform */
got = clGetPlatformIDs(1, &meltopengpu_platform,
&meltopengpu_num_platforms);
if (got != CL_SUCCESS);
meltopengpu_fatal_printf ("MELTOPENGPU failed to get OpenCL PlateformIDs [%d]",
(int) got);
/* Get the GPU device */
got = clGetDeviceIDs (meltopengpu_platform,
CL_DEVICE_TYPE_GPU, /* perhaps CL_DEVICE_TYPE_DEFAULT? */
1,
&meltopengpu_device,
&meltopengpu_num_devices);
if (got != CL_SUCCESS)
meltopengpu_fatal_printf ("MELTOPENGPU failed to get OpenCL device [%d]",
(int) got);
/* Create the context. */
got = CL_SUCCESS;
meltopengpu_context
= clCreateContext (NULL,
1,
&meltopengpu_device,
NULL, NULL,
&got);
if (!meltopengpu_context)
meltopengpu_fatal_printf ("MELTOPENGPU failed to create OpenCL context [%d]",
(int) got);
/* Create the command queue. */
got = CL_SUCCESS;
meltopengpu_command_queue
= clCreateCommandQueue (meltopengpu_context,
meltopengpu_device,
0,
&got);
if (!meltopengpu_command_queue)
meltopengpu_fatal_printf ("MELTOPENGPU failed to create OpenCL command queue [%d]",
(int) got);
/* at last, remember that we have been initialized correctly. */
meltopengpu_is_initialized = 1;
}
cl_program
meltopengpu_compile_program (const char*src)
{
cl_int got = CL_SUCCESS;
cl_program prog = NULL;
if (!src || !meltopengpu_is_initialized)
return NULL;
/* compile the program */
prog =
clCreateProgramWithSource (meltopengpu_context,
1,
&src,
0,
&got);
if (!prog)
meltopengpu_fatal_printf("MELTOPENGPU failed to compile OpenCL program [%d]",
(int) got);
/* build it */
got = clBuildProgram (prog, 1, &meltopengpu_device, NULL, NULL, NULL);
if (got != CL_SUCCESS)
meltopengpu_fatal_printf ("MELTOPNBPU failed to build OpenCL program [%d]",
(int) got);
return prog;
}
cl_kernel
meltopengpu_create_kernel (cl_program prog, const char*kernam)
{
cl_kernel kern = 0;
cl_int got = CL_SUCCESS;
kern = clCreateKernel (prog, kernam, &got);
if (!kern)
meltopengpu_fatal_printf ("MELTOPNBPU failed to create kernel %s [%d]",
kernam, (int) got);
return kern;
}
/* eof $Id$ */
|
