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SFMT.h 3.91 KB
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/**
* @file SFMT.h
*
* @brief SIMD oriented Fast Mersenne Twister(SFMT) pseudorandom
* number generator
*
* @author Mutsuo Saito (Hiroshima University)
* @author Makoto Matsumoto (Hiroshima University)
*
* Copyright (C) 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima
* University. All rights reserved.
*
* The new BSD License is applied to this software.
* see LICENSE.txt
*
* @note We assume that your system has inttypes.h. If your system
* doesn't have inttypes.h, you have to typedef uint32_t and uint64_t,
* and you have to define PRIu64 and PRIx64 in this file as follows:
* @verbatim
typedef unsigned int uint32_t
typedef unsigned long long uint64_t
#define PRIu64 "llu"
#define PRIx64 "llx"
@endverbatim
* uint32_t must be exactly 32-bit unsigned integer type (no more, no
* less), and uint64_t must be exactly 64-bit unsigned integer type.
* PRIu64 and PRIx64 are used for printf function to print 64-bit
* unsigned int and 64-bit unsigned int in hexadecimal format.
*/
#ifndef SFMT_H
#define SFMT_H
#include <stdio.h>
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
#include <inttypes.h>
#elif defined(_MSC_VER) || defined(__BORLANDC__)
typedef unsigned int uint32_t;
typedef unsigned __int64 uint64_t;
#define inline __inline
#else
#include <inttypes.h>
#if defined(__GNUC__)
#define inline __inline__
#endif
#endif
#ifndef PRIu64
#if defined(_MSC_VER) || defined(__BORLANDC__)
#define PRIu64 "I64u"
#define PRIx64 "I64x"
#else
#define PRIu64 "llu"
#define PRIx64 "llx"
#endif
#endif
#if defined(__GNUC__)
#define ALWAYSINLINE __attribute__((always_inline))
#else
#define ALWAYSINLINE
#endif
#if defined(_MSC_VER)
#if _MSC_VER >= 1200
#define PRE_ALWAYS __forceinline
#else
#define PRE_ALWAYS inline
#endif
#else
#define PRE_ALWAYS inline
#endif
uint32_t gen_rand32(void);
uint64_t gen_rand64(void);
void fill_array32(uint32_t *array, int size);
void fill_array64(uint64_t *array, int size);
void init_gen_rand(uint32_t seed);
void init_by_array(uint32_t *init_key, int key_length);
const char *get_idstring(void);
int get_min_array_size32(void);
int get_min_array_size64(void);
/* These real versions are due to Isaku Wada */
/** generates a random number on [0,1]-real-interval */
inline static double to_real1(uint32_t v)
{
return v * (1.0/4294967295.0);
/* divided by 2^32-1 */
}
/** generates a random number on [0,1]-real-interval */
inline static double genrand_real1(void)
{
return to_real1(gen_rand32());
}
/** generates a random number on [0,1)-real-interval */
inline static double to_real2(uint32_t v)
{
return v * (1.0/4294967296.0);
/* divided by 2^32 */
}
/** generates a random number on [0,1)-real-interval */
inline static double genrand_real2(void)
{
return to_real2(gen_rand32());
}
/** generates a random number on (0,1)-real-interval */
inline static double to_real3(uint32_t v)
{
return (((double)v) + 0.5)*(1.0/4294967296.0);
/* divided by 2^32 */
}
/** generates a random number on (0,1)-real-interval */
inline static double genrand_real3(void)
{
return to_real3(gen_rand32());
}
/** These real versions are due to Isaku Wada */
/** generates a random number on [0,1) with 53-bit resolution*/
inline static double to_res53(uint64_t v)
{
return (double)(v * (1.0/18446744073709551616.0L));
}
/** generates a random number on [0,1) with 53-bit resolution from two
* 32 bit integers */
inline static double to_res53_mix(uint32_t x, uint32_t y)
{
return to_res53(x | ((uint64_t)y << 32));
}
/** generates a random number on [0,1) with 53-bit resolution
*/
inline static double genrand_res53(void)
{
return to_res53(gen_rand64());
}
/** generates a random number on [0,1) with 53-bit resolution
using 32bit integer.
*/
inline static double genrand_res53_mix(void)
{
uint32_t x, y;
x = gen_rand32();
y = gen_rand32();
return to_res53_mix(x, y);
}
#endif

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