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# SFMT Documentation

### 1.3.3

This is SIMD oriented Fast Mersenne Twister pseudorandom number generator(SFMT). This Project provides pseudorandom number generators of various Mersenne Prime Period: from 2607-1 to 2216091-1.

Please check endianness in source codes carefully, if you are using BIG ENDIAN.

- void init_gen_rand() initializes the generator with a 32-bit integer seed.
- void init_by_array() initializes the generator with an array of 32-bit integers as the seeds.
- uint32_t gen_rand32() generates and returns a pseudorandom 32-bit unsigned integer.
- uint32_t gen_rand64() generates and returns a pseudorandom 64-bit unsigned integer.
- void fill_array32() fills the user-specified array with 32-bit pseudorandom integers.
- void fill_array64() fills the user-specified array with 64-bit pseudorandom integers.
- inline static double to_real1(uint32_t v) convert v to double on [0,1]-real-interval.
- inline static double genrand_real1() generates a random number on [0,1]-real-interval.
- inline static double to_real2(uint32_t v) convert v to double on [0,1)-real-interval.
- inline static double genrand_real2() generates a random number on [0,1)-real-interval.
- inline static double to_real3(uint32_t v) convert v to double on (0,1)-real-interval.
- inline static double genrand_real3() generates a random number on (0,1)-real-interval.
- inline static double to_res53(uint64_t v) convert v to double on [0,1) with 53-bit resolution
- inline static double genrand_res53() generates a random number on [0,1) with 53-bit resolution
- inline static double to_res53_mix(uint32_t x, uint32_t y) convert v to double on [0,1) with 53-bit resolution from two 32bit integers.
- inline static double genrand_res53_mix() generates a random number on [0,1) with 53-bit resolution using 32bit generation.

Each SFMT.xxx.out.txt file contains 1000 outputs of gen_rand32() initialized by init_genrand(1234), and 1000 outputs of gen_rand32() initialized by init_by_array with an array of {0x1234, 0x5678, 0x9abc, 0xdef0}.

see How to compile to compile your program with SFMT optimized for SIMD.

Author:
  Mutsuo Saito (saito@our-domain) Hiroshima University

  Makoto Matsumoto (m-mat@our-domain) Hiroshima University

Please change our-domain to math.sci.hiroshima-u.ac.jp

Date:
  2007-10-3

Copyright (C) 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima University. All rights reserved.

The new BSD License is applied to this software.

    Copyright (c) 2006,2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima
    University. All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
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        * Redistributions of source code must retain the above copyright
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        * Neither the name of the Hiroshima University nor the names of
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