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
|
/* ************************************************************************
* Copyright 2013 Advanced Micro Devices, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ************************************************************************/
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
/* Include CLBLAS header. It automatically includes needed OpenCL header,
* so we can drop out explicit inclusion of cl.h header.
*/
#include <clBLAS.h>
/* This example uses predefined matrices and their characteristics for
* simplicity purpose.
*/
static const clblasOrder order = clblasRowMajor;
static const clblasSide side = clblasLeft;
static const size_t M = 4;
static const size_t N = 5;
static const cl_float alpha = 10;
static const clblasTranspose transA = clblasNoTrans;
static const clblasUplo uploA = clblasUpper;
static const clblasDiag diagA = clblasNonUnit;
static const cl_float A[] = {
11, 12, 13, 14,
0, 22, 23, 24,
0, 0, 33, 34,
0, 0, 0, 44
};
static const size_t lda = 4; /* i.e. lda = M */
static cl_float B[] = {
11, 12, 13, 14, 15,
21, 22, 23, 24, 25,
31, 32, 33, 34, 35,
41, 42, 43, 44, 45
};
static const size_t ldb = 5; /* i.e. ldb = N */
static cl_float result[20]; /* ldb*M */
static const size_t off = 1;
static const size_t offA = 4 + 1; /* M + off */
static const size_t offB = 5 + 1; /* N + off */
static void
printResult(const char* str)
{
size_t i, j, nrows;
printf("%s:\n", str);
nrows = (sizeof(result) / sizeof(cl_float)) / ldb;
for (i = 0; i < nrows; i++) {
for (j = 0; j < ldb; j++) {
printf("%.5e ", result[i * ldb + j]);
}
printf("\n");
}
}
int
main(void)
{
cl_int err;
cl_platform_id platform = 0;
cl_device_id device = 0;
cl_context_properties props[3] = { CL_CONTEXT_PLATFORM, 0, 0 };
cl_context ctx = 0;
cl_command_queue queue = 0;
cl_mem bufA, bufB;
cl_event event = NULL;
int ret = 0;
/* Setup OpenCL environment. */
err = clGetPlatformIDs(1, &platform, NULL);
if (err != CL_SUCCESS) {
printf( "clGetPlatformIDs() failed with %d\n", err );
return 1;
}
err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 1, &device, NULL);
if (err != CL_SUCCESS) {
printf( "clGetDeviceIDs() failed with %d\n", err );
return 1;
}
props[1] = (cl_context_properties)platform;
ctx = clCreateContext(props, 1, &device, NULL, NULL, &err);
if (err != CL_SUCCESS) {
printf( "clCreateContext() failed with %d\n", err );
return 1;
}
queue = clCreateCommandQueue(ctx, device, 0, &err);
if (err != CL_SUCCESS) {
printf( "clCreateCommandQueue() failed with %d\n", err );
clReleaseContext(ctx);
return 1;
}
/* Setup clblas. */
err = clblasSetup();
if (err != CL_SUCCESS) {
printf("clblasSetup() failed with %d\n", err);
clReleaseCommandQueue(queue);
clReleaseContext(ctx);
return 1;
}
/* Prepare OpenCL memory objects and place matrices inside them. */
bufA = clCreateBuffer(ctx, CL_MEM_READ_ONLY, M * M * sizeof(*A),
NULL, &err);
bufB = clCreateBuffer(ctx, CL_MEM_READ_WRITE, M * N * sizeof(*B),
NULL, &err);
err = clEnqueueWriteBuffer(queue, bufA, CL_TRUE, 0,
M * M * sizeof(*A), A, 0, NULL, NULL);
err = clEnqueueWriteBuffer(queue, bufB, CL_TRUE, 0,
M * N * sizeof(*B), B, 0, NULL, NULL);
/* Call clblas function. Perform TRSM for the lower right sub-matrices */
err = clblasStrsm(order, side, uploA, transA, diagA, M - off, N - off,
alpha, bufA, offA, lda, bufB, offB, ldb, 1, &queue, 0,
NULL, &event);
if (err != CL_SUCCESS) {
printf("clblasStrsmEx() failed with %d\n", err);
ret = 1;
}
else {
/* Wait for calculations to be finished. */
err = clWaitForEvents(1, &event);
/* Fetch results of calculations from GPU memory. */
err = clEnqueueReadBuffer(queue, bufB, CL_TRUE, 0,
M * N * sizeof(*result),
result, 0, NULL, NULL);
/* At this point you will get the result of STRSM placed in 'result' array. */
puts("");
printResult("clblasStrsmEx result");
}
/* Release OpenCL memory objects. */
clReleaseMemObject(bufB);
clReleaseMemObject(bufA);
/* Finalize work with clblas. */
clblasTeardown();
/* Release OpenCL working objects. */
clReleaseCommandQueue(queue);
clReleaseContext(ctx);
return ret;
}
|
