/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2010-2012, 2014, 2019, 2021  Université de Bordeaux 1
 * Copyright (C) 2010-2014  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 <starpu.h>

#define    NX    2048

/* This kernel takes a buffer and scales it by a constant factor */
void vector_scal_cpu(float *val, unsigned n, float factor)
{
	unsigned i;

	/* scale the vector */
	for (i = 0; i < n; i++)
		val[i] *= factor;
}

int main(void)
{
	/* We consider a vector of float that is initialized just as any of C
	 * data */
	float *vector;
	unsigned i;

	vector = malloc(sizeof(vector[0]) * NX);
	for (i = 0; i < NX; i++)
		vector[i] = 1.0f;

	fprintf(stderr, "BEFORE : First element was %f\n", vector[0]);

	float factor = 3.14;
	vector_scal_cpu(vector, NX, factor);

	fprintf(stderr, "AFTER First element is %f\n", vector[0]);

	return 0;
}