3
* Copyright 2008,2009 Free Software Foundation, Inc.
5
* This file is part of GNU Radio
7
* GNU Radio is free software; you can redistribute it and/or modify
8
* it under the terms of the GNU General Public License as published by
9
* the Free Software Foundation; either version 3, or (at your option)
12
* GNU Radio is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15
* GNU General Public License for more details.
17
* You should have received a copy of the GNU General Public License along
18
* with this program; if not, write to the Free Software Foundation, Inc.,
19
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21
#include <gcell/spu/gc_random.h>
23
static int last_val = 0;
25
# define M 259200 // values from Numerical Recipes in C, 1988
32
last_val = ((unsigned int) seed) % M;
36
* Return a uniformly distributed value in the range [0, 1.0)
37
* (Linear congruential generator. YMMV. Caveat emptor.)
40
gc_uniform_deviate(void)
42
last_val = (last_val * A + C) % M;
43
return (float) last_val * (1.0f / (float) M);