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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2012 Institut National de Recherche en Informatique et Automatique
* Copyright (C) 2010, 2011 Centre National de la Recherche Scientifique
* Copyright (C) 2010 Université de Bordeaux 1
*
* 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.
*/
/* CUDA implementation of the `vector_scal' task. */
#include <starpu.h>
#include <starpu_cuda.h>
#include <stdlib.h>
static __global__ void
vector_mult_cuda (float *val, unsigned n, float factor)
{
unsigned i = blockIdx.x * blockDim.x + threadIdx.x;
if (i < n)
val[i] *= factor;
}
extern "C" void
vector_scal_cuda (size_t size, float vector[], float factor)
{
unsigned threads_per_block = 64;
unsigned nblocks = (size + threads_per_block - 1) / threads_per_block;
vector_mult_cuda <<< nblocks, threads_per_block, 0,
starpu_cuda_get_local_stream () >>> (vector, size, factor);
cudaStreamSynchronize (starpu_cuda_get_local_stream ());
}
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