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/* ************************************************************************
* 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 = clblasColumnMajor;
static const size_t N = 5;
static const cl_double2 alpha = {{10,10}};
static const clblasUplo uplo = clblasUpper;
static const cl_double2 A[] = {
{{ 1.0, 00.0}}, {{ 2.0, 02.0}}, {{ 4.0, 4.0}}, {{ 7.0, 7.0}}, {{11.0, 11.0}},
{{00.0, 00.0}}, {{ 3.0, 03.0}}, {{ 5.0, 5.0}}, {{ 8.0, 8.0}}, {{12.0, 12.0}},
{{00.0, 00.0}}, {{00.0, 00.0}}, {{ 6.0, 6.0}}, {{ 9.0, 9.0}}, {{13.0, 13.0}},
{{00.0, 00.0}}, {{00.0, 00.0}}, {{00.0, 00.0}}, {{10.0, 10.0}}, {{14.0, 14.0}},
{{00.0, 00.0}}, {{00.0, 00.0}}, {{00.0, 00.0}}, {{00.0, 00.0}}, {{15.0, 15.0}}
};
static const size_t lda = 5; /* i.e. lda = N */
static const cl_double2 X[] = {
{{1.0, 0.0}},
{{2.0, 0.0}},
{{3.0, 0.0}},
{{4.0, 0.0}},
{{5.0, 0.0}}
};
static const int incx = 1;
static const cl_double2 beta = {{20.0, 20.0}};
static cl_double2 Y[] = {
{{1.0, 0.0}},
{{2.0, 0.0}},
{{3.0, 0.0}},
{{4.0, 0.0}},
{{5.0, 0.0}}
};
static const int incy = 1;
static void
printResult(void)
{
size_t i, nElements;
printf("Result:\n");
nElements = (sizeof(Y) / sizeof(cl_double2)) / incy;
for (i = 0; i < nElements; i++) {
printf("(%9.2f, %-9.2f)\n", CREAL(Y[i * incy]), CIMAG(Y[i * incy]));
}
}
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, bufX, bufY;
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, N * lda * sizeof(*A),
NULL, &err);
bufX = clCreateBuffer(ctx, CL_MEM_READ_ONLY, N * sizeof(*X),
NULL, &err);
bufY = clCreateBuffer(ctx, CL_MEM_READ_WRITE, N * sizeof(*Y),
NULL, &err);
err = clEnqueueWriteBuffer(queue, bufA, CL_TRUE, 0,
N * lda * sizeof(*A), A, 0, NULL, NULL);
err = clEnqueueWriteBuffer(queue, bufX, CL_TRUE, 0,
N * sizeof(*X), X, 0, NULL, NULL);
err = clEnqueueWriteBuffer(queue, bufY, CL_TRUE, 0,
N * sizeof(*Y), Y, 0, NULL, NULL);
/* Call clblas function. */
err = clblasZhemv(order, uplo, N, alpha, bufA, 0 /*offA */, lda,
bufX, 0 /*offx*/, incx, beta,
bufY, 0 /*offx*/, incy, 1, &queue, 0, NULL, &event);
// blasZhemv(order, uplo, N, alpha, (DoubleComplex*)A, 0, lda, (DoubleComplex*)X, 0, incx, beta, (DoubleComplex*)Y, 0, incy);
// err = CL_SUCCESS;
//err = clblasZtrmv(order, uplo, clblasNoTrans, clblasNonUnit, N, bufA, 0 /*offA */, lda,
// bufX, 0 /*offx*/, incx,
// bufY, 1, &queue, 0, NULL, &event);
if (err != CL_SUCCESS) {
printf("clblasZhemv() failed with %d\n", err);
ret = 1;
}
else {
/* Wait for calculations to be finished. */
err = clWaitForEvents(1, &event);
printResult();
/* Fetch results of calculations from GPU memory. */
err = clEnqueueReadBuffer(queue, bufY, CL_TRUE, 0, N * sizeof(*Y),
Y, 0, NULL, NULL);
/* At this point you will get the result of SSYMV placed in Y array. */
printResult();
}
/* Release OpenCL memory objects. */
clReleaseMemObject(bufY);
clReleaseMemObject(bufX);
clReleaseMemObject(bufA);
/* Finalize work with clblas. */
clblasTeardown();
/* Release OpenCL working objects. */
clReleaseCommandQueue(queue);
clReleaseContext(ctx);
return ret;
}
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