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Diffstat (limited to 'sms/SFMT.h')
-rw-r--r-- | sms/SFMT.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/sms/SFMT.h b/sms/SFMT.h new file mode 100644 index 0000000..7c8b35e --- /dev/null +++ b/sms/SFMT.h @@ -0,0 +1,157 @@ +/** + * @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 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 |