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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2009, 2010, 2011 Université de Bordeaux 1
* Copyright (C) 2010 Mehdi Juhoor <mjuhoor@gmail.com>
* Copyright (C) 2010, 2011, 2012 Centre National de la Recherche Scientifique
*
* StarPU is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* StarPU 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 Lesser General Public License in COPYING.LGPL for more details.
*/
#include "spmv.h"
#ifdef STARPU_USE_OPENCL
struct starpu_opencl_program opencl_codelet;
void spmv_kernel_opencl(void *descr[], void *args)
{
cl_kernel kernel;
cl_command_queue queue;
cl_event event;
int id, devid, err, n;
int nnz = (int) STARPU_CSR_GET_NNZ(descr[0]);
int nrow = (int) STARPU_CSR_GET_NROW(descr[0]);
cl_mem nzval = (cl_mem)STARPU_CSR_GET_NZVAL(descr[0]);
cl_mem colind = (cl_mem)STARPU_CSR_GET_COLIND(descr[0]);
cl_mem rowptr = (cl_mem)STARPU_CSR_GET_ROWPTR(descr[0]);
int firstentry = STARPU_CSR_GET_FIRSTENTRY(descr[0]);
cl_mem vecin = (cl_mem)STARPU_VECTOR_GET_DEV_HANDLE(descr[1]);
int nx_in = (int)STARPU_VECTOR_GET_NX(descr[1]);
cl_mem vecout = (cl_mem)STARPU_VECTOR_GET_DEV_HANDLE(descr[2]);
int nx_out = (int)STARPU_VECTOR_GET_NX(descr[2]);
id = starpu_worker_get_id();
devid = starpu_worker_get_devid(id);
err = starpu_opencl_load_kernel(&kernel, &queue, &opencl_codelet, "spmv", devid);
if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
n=0;
err = clSetKernelArg(kernel, n++, sizeof(nnz), &nnz);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(nrow), &nrow);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(nzval), &nzval);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(colind), &colind);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(rowptr), &rowptr);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(firstentry), &firstentry);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(vecin), &vecin);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(nx_in), &nx_in);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(vecout), &vecout);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
err = clSetKernelArg(kernel, n++, sizeof(nx_out), &nx_out);
if (err != CL_SUCCESS)
STARPU_OPENCL_REPORT_ERROR(err);
{
size_t global=nrow;
err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, NULL, 0, NULL, &event);
if (err != CL_SUCCESS) STARPU_OPENCL_REPORT_ERROR(err);
}
clFinish(queue);
starpu_opencl_collect_stats(event);
clReleaseEvent(event);
starpu_opencl_release_kernel(kernel);
}
void compile_spmv_opencl_kernel(void)
{
int ret;
ret = starpu_opencl_load_opencl_from_file("examples/spmv/spmv_opencl.cl", &opencl_codelet, NULL);
if (ret)
{
FPRINTF(stderr, "Failed to compile OpenCL codelet\n");
exit(ret);
}
}
#endif
void spmv_kernel_cpu(void *descr[], __attribute__((unused)) void *arg)
{
float *nzval = (float *)STARPU_CSR_GET_NZVAL(descr[0]);
uint32_t *colind = STARPU_CSR_GET_COLIND(descr[0]);
uint32_t *rowptr = STARPU_CSR_GET_ROWPTR(descr[0]);
float *vecin = (float *)STARPU_VECTOR_GET_PTR(descr[1]);
float *vecout = (float *)STARPU_VECTOR_GET_PTR(descr[2]);
uint32_t firstelem = STARPU_CSR_GET_FIRSTENTRY(descr[0]);
uint32_t nrow;
nrow = STARPU_CSR_GET_NROW(descr[0]);
STARPU_ASSERT(nrow == STARPU_VECTOR_GET_NX(descr[2]));
unsigned row;
for (row = 0; row < nrow; row++)
{
float tmp = 0.0f;
unsigned index;
unsigned firstindex = rowptr[row] - firstelem;
unsigned lastindex = rowptr[row+1] - firstelem;
for (index = firstindex; index < lastindex; index++)
{
unsigned col;
col = colind[index];
tmp += nzval[index]*vecin[col];
}
vecout[row] = tmp;
}
}
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