rand-clcg4.c File Reference

RNG Implementation module. More...

#include <ross.h>

Go to the source code of this file.

Macros
#define	H   32768
#define	S0_MAX   2147483646
#define	S1_MAX   2147483542
#define	S2_MAX   2147483422
#define	S3_MAX   2147483322

Functions
long long	FindB (long long a, long long k, long long m)
	Find B to run CLCG4 backwards.
int32_t	MultModM (int32_t s, int32_t t, int32_t M)
	Returns(s*t) MOD M.
void	clamp_seed (uint32_t s[4])
void	rng_set_seed (tw_rng_stream *g, uint32_t s[4], tw_rng *the_rng)
void	rng_write_state (tw_rng_stream *g, FILE *f)
void	rng_get_state (tw_rng_stream *g, uint32_t s[4])
void	rng_put_state (tw_rng_stream *g, uint32_t s[4])
void	rng_init_generator (tw_rng_stream *g, SeedType Where, tw_rng *the_rng)
void	tw_rand_initial_seed (tw_rng_stream *g, tw_lpid id, tw_rng *the_rng)
void	tw_rand_init_streams (tw_lp *lp, unsigned int nstreams, unsigned int n_core_streams)
tw_rng *	rng_init (int v, int w)
tw_rng *	rng_core_init (int v, int w)
double	rng_gen_val (tw_rng_stream *g)
double	rng_gen_reverse_val (tw_rng_stream *g)

Variables
static tw_rng *	rng = NULL
static tw_rng *	core_rng = NULL
int32_t	seed [4] = { 11111111, 22222222, 33333333, 44444444 }

Detailed Description

Random number generator, provides all of the features GTW requires by default. Chris hacked this pretty well, he would know the features better.

Definition in file rand-clcg4.c.

Macro Definition Documentation

H

#define H   32768

Definition at line 20 of file rand-clcg4.c.

Referenced by MultModM().

S0_MAX

#define S0_MAX   2147483646

Definition at line 146 of file rand-clcg4.c.

Referenced by clamp_seed().

S1_MAX

#define S1_MAX   2147483542

Definition at line 147 of file rand-clcg4.c.

Referenced by clamp_seed().

S2_MAX

#define S2_MAX   2147483422

Definition at line 148 of file rand-clcg4.c.

Referenced by clamp_seed().

S3_MAX

#define S3_MAX   2147483322

Definition at line 149 of file rand-clcg4.c.

Referenced by clamp_seed().

Function Documentation

clamp_seed()

void clamp_seed

(

uint32_t

s[4]

)

These seeds MUST adhere to these requirements. This is explicitly stated in L'Ecuyer and Andres (1997)

Definition at line 155 of file rand-clcg4.c.

References S0_MAX, S1_MAX, S2_MAX, and S3_MAX.

Referenced by rng_core_init(), rng_init(), rng_set_seed(), and tw_rand_initial_seed().

FindB()

long long FindB	(	long long	a,
		long long	k,
		long long	m )

FindB

B is
which is used in running the CLCG4 backwards
Added by Chris Carothers, 5/15/98

Definition at line 39 of file rand-clcg4.c.

Referenced by rng_init().

MultModM()

int32_t MultModM	(	int32_t	s,
		int32_t	t,
		int32_t	M )

MultiModM

See L'Ecuyer and Cote(1991).

Returns(s*t) MOD M. Assumes that -M < s < M and -M < t < M.

Definition at line 79 of file rand-clcg4.c.

References H.

Referenced by rng_init(), rng_init_generator(), and tw_rand_initial_seed().

rng_core_init()

tw_rng * rng_core_init	(	int	v,
		int	w )

Definition at line 416 of file rand-clcg4.c.

References clamp_seed(), core_rng, g_tw_core_rng_seed, g_tw_mynode, rng, tw_calloc(), and TW_LOC.

Referenced by tw_rand_core_init().

rng_gen_reverse_val()

double rng_gen_reverse_val

(

tw_rng_stream *

g

)

Definition at line 515 of file rand-clcg4.c.

References tw_rng_stream::Cg, tw_rng_stream::count, rng, tw_error(), and TW_LOC.

rng_gen_val()

double rng_gen_val

(

tw_rng_stream *

g

)

Definition at line 451 of file rand-clcg4.c.

References tw_rng_stream::Cg, and tw_rng_stream::count.

rng_get_state()

void rng_get_state	(	tw_rng_stream *	g,
		uint32_t	s[4] )

Definition at line 214 of file rand-clcg4.c.

References tw_rng_stream::Cg.

rng_init()

tw_rng * rng_init	(	int	v,
		int	w )

Definition at line 359 of file rand-clcg4.c.

References clamp_seed(), FindB(), g_tw_mynode, g_tw_rng_seed, MultModM(), rng, tw_calloc(), and TW_LOC.

Referenced by tw_rand_init().

rng_init_generator()

void rng_init_generator	(	tw_rng_stream *	g,
		SeedType	Where,
		tw_rng *	the_rng )

Definition at line 241 of file rand-clcg4.c.

References tw_rng::aw, tw_rng_stream::Cg, tw_rng_stream::Ig, InitialSeed, LastSeed, tw_rng_stream::Lg, tw_rng::m, MultModM(), and NewSeed.

Referenced by rng_set_seed(), and tw_rand_initial_seed().

rng_put_state()

void rng_put_state	(	tw_rng_stream *	g,
		uint32_t	s[4] )

Definition at line 228 of file rand-clcg4.c.

References tw_rng_stream::Cg.

rng_set_seed()

void rng_set_seed	(	tw_rng_stream *	g,
		uint32_t	s[4],
		tw_rng *	the_rng )

Definition at line 183 of file rand-clcg4.c.

References clamp_seed(), tw_rng_stream::Ig, InitialSeed, and rng_init_generator().

rng_write_state()

void rng_write_state	(	tw_rng_stream *	g,
		FILE *	f )

Definition at line 200 of file rand-clcg4.c.

References tw_rng_stream::Cg.

tw_rand_init_streams()

void tw_rand_init_streams	(	tw_lp *	lp,
		unsigned int	nstreams,
		unsigned int	n_core_streams )

Definition at line 329 of file rand-clcg4.c.

References core_rng, tw_lp::core_rng, g_tw_nRNG_core_per_lp, g_tw_nRNG_per_lp, g_tw_total_lps, tw_lp::gid, rng, tw_lp::rng, tw_calloc(), tw_error(), TW_LOC, and tw_rand_initial_seed().

Referenced by tw_define_lps().

tw_rand_initial_seed()

void tw_rand_initial_seed	(	tw_rng_stream *	g,
		tw_lpid	id,
		tw_rng *	the_rng )

Definition at line 268 of file rand-clcg4.c.

References tw_rng::avw, clamp_seed(), tw_rng_stream::count, tw_rng_stream::Ig, InitialSeed, tw_rng::m, MultModM(), rng, rng_init_generator(), and tw_rng::seed.

Referenced by tw_rand_init_streams().

Variable Documentation

core_rng

tw_rng* core_rng = NULL

static

Definition at line 25 of file rand-clcg4.c.

Referenced by rng_core_init(), and tw_rand_init_streams().

rng

tw_rng* rng = NULL

static

Definition at line 23 of file rand-clcg4.c.

Referenced by rng_core_init(), rng_gen_reverse_val(), rng_init(), tw_rand_init_streams(), and tw_rand_initial_seed().

seed

int32_t seed[4] = { 11111111, 22222222, 33333333, 44444444 }

Definition at line 28 of file rand-clcg4.c.