Mercurial > vba-linux

     1 /** 

     2  * @file SFMT.h 

     3  *

     4  * @brief SIMD oriented Fast Mersenne Twister(SFMT) pseudorandom

     5  * number generator

     6  *

     7  * @author Mutsuo Saito (Hiroshima University)

     8  * @author Makoto Matsumoto (Hiroshima University)

     9  *

    10  * Copyright (C) 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima

    11  * University. All rights reserved.

    12  *

    13  * The new BSD License is applied to this software.

    14  * see LICENSE.txt

    15  *

    16  * @note We assume that your system has inttypes.h.  If your system

    17  * doesn't have inttypes.h, you have to typedef uint32_t and uint64_t,

    18  * and you have to define PRIu64 and PRIx64 in this file as follows:

    19  * @verbatim

    20  typedef unsigned int uint32_t

    21  typedef unsigned long long uint64_t  

    22  #define PRIu64 "llu"

    23  #define PRIx64 "llx"

    24 @endverbatim

    25  * uint32_t must be exactly 32-bit unsigned integer type (no more, no

    26  * less), and uint64_t must be exactly 64-bit unsigned integer type.

    27  * PRIu64 and PRIx64 are used for printf function to print 64-bit

    28  * unsigned int and 64-bit unsigned int in hexadecimal format.

    29  */

    30 

    31 #ifndef SFMT_H

    32 #define SFMT_H

    33 

    34 #include <stdio.h>

    35 

    36 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)

    37   #include <inttypes.h>

    38 #elif defined(_MSC_VER) || defined(__BORLANDC__)

    39   typedef unsigned int uint32_t;

    40   typedef unsigned __int64 uint64_t;

    41   #define inline __inline

    42 #else

    43   #include <inttypes.h>

    44   #if defined(__GNUC__)

    45     #define inline __inline__

    46   #endif

    47 #endif

    48 

    49 #ifndef PRIu64

    50   #if defined(_MSC_VER) || defined(__BORLANDC__)

    51     #define PRIu64 "I64u"

    52     #define PRIx64 "I64x"

    53   #else

    54     #define PRIu64 "llu"

    55     #define PRIx64 "llx"

    56   #endif

    57 #endif

    58 

    59 #if defined(__GNUC__)

    60 #define ALWAYSINLINE __attribute__((always_inline))

    61 #else

    62 #define ALWAYSINLINE

    63 #endif

    64 

    65 #if defined(_MSC_VER)

    66   #if _MSC_VER >= 1200

    67     #define PRE_ALWAYS __forceinline

    68   #else

    69     #define PRE_ALWAYS inline

    70   #endif

    71 #else

    72   #define PRE_ALWAYS inline

    73 #endif

    74 

    75 #if defined(__cplusplus) || defined(c_plusplus)

    76 //extern "C" {

    77 #endif

    78 

    79 uint32_t gen_rand32(void);

    80 uint64_t gen_rand64(void);

    81 void fill_array32(uint32_t *array, int size);

    82 void fill_array64(uint64_t *array, int size);

    83 void init_gen_rand(uint32_t seed);

    84 void init_by_array(uint32_t *init_key, int key_length);

    85 const char *get_idstring(void);

    86 int get_min_array_size32(void);

    87 int get_min_array_size64(void);

    88 

    89 #if defined(__cplusplus) || defined(c_plusplus)

    90 //} // end extern

    91 #endif

    92 

    93 /* These real versions are due to Isaku Wada */

    94 /** generates a random number on [0,1]-real-interval */

    95 inline static double to_real1(uint32_t v)

    96 {

    97     return v * (1.0/4294967295.0); 

    98     /* divided by 2^32-1 */ 

    99 }

   100 

   101 /** generates a random number on [0,1]-real-interval */

   102 inline static double genrand_real1(void)

   103 {

   104     return to_real1(gen_rand32());

   105 }

   106 

   107 /** generates a random number on [0,1)-real-interval */

   108 inline static double to_real2(uint32_t v)

   109 {

   110     return v * (1.0/4294967296.0); 

   111     /* divided by 2^32 */

   112 }

   113 

   114 /** generates a random number on [0,1)-real-interval */

   115 inline static double genrand_real2(void)

   116 {

   117     return to_real2(gen_rand32());

   118 }

   119 

   120 /** generates a random number on (0,1)-real-interval */

   121 inline static double to_real3(uint32_t v)

   122 {

   123     return (((double)v) + 0.5)*(1.0/4294967296.0); 

   124     /* divided by 2^32 */

   125 }

   126 

   127 /** generates a random number on (0,1)-real-interval */

   128 inline static double genrand_real3(void)

   129 {

   130     return to_real3(gen_rand32());

   131 }

   132 /** These real versions are due to Isaku Wada */

   133 

   134 /** generates a random number on [0,1) with 53-bit resolution*/

   135 inline static double to_res53(uint64_t v) 

   136 { 

   137     return v * (1.0/18446744073709551616.0L);

   138 }

   139 

   140 /** generates a random number on [0,1) with 53-bit resolution from two

   141  * 32 bit integers */

   142 inline static double to_res53_mix(uint32_t x, uint32_t y) 

   143 { 

   144     return to_res53(x | ((uint64_t)y << 32));

   145 }

   146 

   147 /** generates a random number on [0,1) with 53-bit resolution

   148  */

   149 inline static double genrand_res53(void) 

   150 { 

   151     return to_res53(gen_rand64());

   152 } 

   153 

   154 /** generates a random number on [0,1) with 53-bit resolution

   155     using 32bit integer.

   156  */

   157 inline static double genrand_res53_mix(void) 

   158 { 

   159     uint32_t x, y;

   160 

   161     x = gen_rand32();

   162     y = gen_rand32();

   163     return to_res53_mix(x, y);

   164 } 

   165 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:33:11 -0600
parents	f9f4f1b99eed
children