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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2010, 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.
*/
__kernel void spmv(int nnz, int nrow,
__global float* nzval, __global unsigned* colind,
__global unsigned* rowptr, int firstentry,
__global float *vecin, int nx_in,
__global float *vecout, int nx_out)
{
const int row = get_global_id(0);
if (row < nrow)
{
float tmp = 0.0f;
unsigned index;
unsigned firstindex = rowptr[row] - firstentry;
unsigned lastindex = rowptr[row+1] - firstentry;
for (index = firstindex; index < lastindex; index++)
{
unsigned col;
col = colind[index];
tmp += nzval[index]*vecin[col];
}
vecout[row] = tmp;
}
}
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