gauthier
c7518ecf42
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7885 818b1a75-f10b-46b9-bf7c-635c3b92a50f
144 lines
3.9 KiB
C
Executable File
144 lines
3.9 KiB
C
Executable File
/*******************************************************************************
|
|
OpenAirInterface
|
|
Copyright(c) 1999 - 2014 Eurecom
|
|
|
|
OpenAirInterface is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
|
|
OpenAirInterface 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with OpenAirInterface.The full GNU General Public License is
|
|
included in this distribution in the file called "COPYING". If not,
|
|
see <http://www.gnu.org/licenses/>.
|
|
|
|
Contact Information
|
|
OpenAirInterface Admin: openair_admin@eurecom.fr
|
|
OpenAirInterface Tech : openair_tech@eurecom.fr
|
|
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
|
|
|
|
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
|
|
|
|
*******************************************************************************/
|
|
|
|
/*! \file taus.c
|
|
* \brief random number generator per OAI component
|
|
* \author Navid Nikaein
|
|
* \date 2011 - 2014
|
|
* \version 0.1
|
|
* \email navid.nikaein@eurecom.fr
|
|
* \warning
|
|
* @ingroup util
|
|
*/
|
|
|
|
#ifndef RTAI_ENABLED
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <math.h>
|
|
#include "oml.h"
|
|
#else
|
|
#include <asm/io.h>
|
|
#include <asm/rtai.h>
|
|
#include <rtai.h>
|
|
#include <rtai_sched.h>
|
|
#define time(x) (unsigned int)(rt_get_time_ns())
|
|
#endif
|
|
|
|
|
|
unsigned int s0[MAX_NUM_COMPS], s1[MAX_NUM_COMPS], s2[MAX_NUM_COMPS], b[MAX_NUM_COMPS], r[MAX_NUM_COMPS];
|
|
|
|
|
|
|
|
|
|
inline unsigned int taus(unsigned int comp)
|
|
{
|
|
|
|
b[comp] = (((s0[comp] << 13) ^ s0[comp]) >> 19);
|
|
s0[comp] = (((s0[comp] & 0xFFFFFFFE) << 12)^ b[comp]);
|
|
b[comp] = (((s1[comp] << 2) ^ s1[comp]) >> 25);
|
|
s1[comp] = (((s1[comp] & 0xFFFFFFF8) << 4)^ b[comp]);
|
|
b[comp] = (((s2[comp] << 3) ^ s2[comp]) >> 11);
|
|
s2[comp] = (((s2[comp] & 0xFFFFFFF0) << 17)^ b[comp]);
|
|
r[comp] = s0[comp] ^ s1[comp] ^ s2[comp];
|
|
return r[comp];
|
|
}
|
|
|
|
void set_taus_seed(unsigned int seed_type)
|
|
{
|
|
|
|
unsigned int i; // i index of component
|
|
|
|
for (i=MIN_NUM_COMPS; i < MAX_NUM_COMPS ; i ++) {
|
|
|
|
switch (seed_type) {
|
|
case 0: // use rand func
|
|
if (i == 0) srand(time(NULL));
|
|
|
|
s0[i] = ((unsigned int)rand());
|
|
s1[i] = ((unsigned int)rand());
|
|
s2[i] = ((unsigned int)rand());
|
|
printf("Initial seeds use rand: s0[%d] = 0x%x, s1[%d] = 0x%x, s2[%d] = 0x%x\n", i, s0[i], i, s1[i], i, s2[i]);
|
|
break;
|
|
|
|
case 1: // use rand with seed
|
|
if (i == 0) srand(0x1e23d851);
|
|
|
|
s0[i] = ((unsigned int)rand());
|
|
s1[i] = ((unsigned int)rand());
|
|
s2[i] = ((unsigned int)rand());
|
|
printf("Initial seeds use rand with seed : s0[%d] = 0x%x, s1[%d] = 0x%x, s2[%d] = 0x%x\n", i, s0[i], i, s1[i], i, s2[i]);
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
int get_rand (unsigned int comp)
|
|
{
|
|
if ((comp > MIN_NUM_COMPS) && (comp < MAX_NUM_COMPS))
|
|
return r[comp];
|
|
else {
|
|
//LOG_E(RNG,"unknown component %d\n",comp);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
unsigned int dtaus(unsigned int comp, unsigned int a, unsigned b)
|
|
{
|
|
|
|
return (int) (((double)taus(comp)/(double)0xffffffff)* (double)(b-a) + (double)a);
|
|
}
|
|
/*
|
|
#ifdef STANDALONE
|
|
main() {
|
|
|
|
unsigned int i,randomg, randphy;
|
|
|
|
set_taus_seed(0);
|
|
printf("dtaus %d \n",dtaus(PHY, 1000, 1000000));
|
|
|
|
do {//for (i=0;i<10;i++){
|
|
randphy = taus(PHY);
|
|
randomg = taus(OTG);
|
|
i++;
|
|
// printf("rand for OMG (%d,0x%x) PHY (%d,0x%x)\n",OMG, randomg, PHY, randphy);
|
|
} while (randphy != randomg);
|
|
printf("after %d run: get rand for (OMG 0x%x, PHY 0x%x)\n",i, get_rand(OTG), get_rand(PHY));
|
|
|
|
}
|
|
#endif
|
|
|
|
*/
|