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Diffstat (limited to 'examples/redis-unstable/src/mt19937-64.c')
| -rw-r--r-- | examples/redis-unstable/src/mt19937-64.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/examples/redis-unstable/src/mt19937-64.c b/examples/redis-unstable/src/mt19937-64.c deleted file mode 100644 index a0c897f..0000000 --- a/examples/redis-unstable/src/mt19937-64.c +++ /dev/null @@ -1,187 +0,0 @@ -/* - A C-program for MT19937-64 (2004/9/29 version). - Coded by Takuji Nishimura and Makoto Matsumoto. - - This is a 64-bit version of Mersenne Twister pseudorandom number - generator. - - Before using, initialize the state by using init_genrand64(seed) - or init_by_array64(init_key, key_length). - - Copyright (C) 2004, Makoto Matsumoto and Takuji Nishimura, - All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - 1. Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - 2. Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - 3. The names of its contributors may not be used to endorse or promote - products derived from this software without specific prior written - permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - References: - T. Nishimura, ``Tables of 64-bit Mersenne Twisters'' - ACM Transactions on Modeling and - Computer Simulation 10. (2000) 348--357. - M. Matsumoto and T. Nishimura, - ``Mersenne Twister: a 623-dimensionally equidistributed - uniform pseudorandom number generator'' - ACM Transactions on Modeling and - Computer Simulation 8. (Jan. 1998) 3--30. - - Any feedback is very welcome. - http://www.math.hiroshima-u.ac.jp/~m-mat/MT/emt.html - email: m-mat @ math.sci.hiroshima-u.ac.jp (remove spaces) -*/ - - -#include "mt19937-64.h" -#include <stdio.h> - -#define NN 312 -#define MM 156 -#define MATRIX_A 0xB5026F5AA96619E9ULL -#define UM 0xFFFFFFFF80000000ULL /* Most significant 33 bits */ -#define LM 0x7FFFFFFFULL /* Least significant 31 bits */ - - -/* The array for the state vector */ -static unsigned long long mt[NN]; -/* mti==NN+1 means mt[NN] is not initialized */ -static int mti=NN+1; - -/* initializes mt[NN] with a seed */ -void init_genrand64(unsigned long long seed) -{ - mt[0] = seed; - for (mti=1; mti<NN; mti++) - mt[mti] = (6364136223846793005ULL * (mt[mti-1] ^ (mt[mti-1] >> 62)) + mti); -} - -/* initialize by an array with array-length */ -/* init_key is the array for initializing keys */ -/* key_length is its length */ -void init_by_array64(unsigned long long init_key[], - unsigned long long key_length) -{ - unsigned long long i, j, k; - init_genrand64(19650218ULL); - i=1; j=0; - k = (NN>key_length ? NN : key_length); - for (; k; k--) { - mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 62)) * 3935559000370003845ULL)) - + init_key[j] + j; /* non linear */ - i++; j++; - if (i>=NN) { mt[0] = mt[NN-1]; i=1; } - if (j>=key_length) j=0; - } - for (k=NN-1; k; k--) { - mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 62)) * 2862933555777941757ULL)) - - i; /* non linear */ - i++; - if (i>=NN) { mt[0] = mt[NN-1]; i=1; } - } - - mt[0] = 1ULL << 63; /* MSB is 1; assuring non-zero initial array */ -} - -/* generates a random number on [0, 2^64-1]-interval */ -unsigned long long genrand64_int64(void) -{ - int i; - unsigned long long x; - static unsigned long long mag01[2]={0ULL, MATRIX_A}; - - if (mti >= NN) { /* generate NN words at one time */ - - /* if init_genrand64() has not been called, */ - /* a default initial seed is used */ - if (mti == NN+1) - init_genrand64(5489ULL); - - for (i=0;i<NN-MM;i++) { - x = (mt[i]&UM)|(mt[i+1]&LM); - mt[i] = mt[i+MM] ^ (x>>1) ^ mag01[(int)(x&1ULL)]; - } - for (;i<NN-1;i++) { - x = (mt[i]&UM)|(mt[i+1]&LM); - mt[i] = mt[i+(MM-NN)] ^ (x>>1) ^ mag01[(int)(x&1ULL)]; - } - x = (mt[NN-1]&UM)|(mt[0]&LM); - mt[NN-1] = mt[MM-1] ^ (x>>1) ^ mag01[(int)(x&1ULL)]; - - mti = 0; - } - - x = mt[mti++]; - - x ^= (x >> 29) & 0x5555555555555555ULL; - x ^= (x << 17) & 0x71D67FFFEDA60000ULL; - x ^= (x << 37) & 0xFFF7EEE000000000ULL; - x ^= (x >> 43); - - return x; -} - -/* generates a random number on [0, 2^63-1]-interval */ -long long genrand64_int63(void) -{ - return (long long)(genrand64_int64() >> 1); -} - -/* generates a random number on [0,1]-real-interval */ -double genrand64_real1(void) -{ - return (genrand64_int64() >> 11) * (1.0/9007199254740991.0); -} - -/* generates a random number on [0,1)-real-interval */ -double genrand64_real2(void) -{ - return (genrand64_int64() >> 11) * (1.0/9007199254740992.0); -} - -/* generates a random number on (0,1)-real-interval */ -double genrand64_real3(void) -{ - return ((genrand64_int64() >> 12) + 0.5) * (1.0/4503599627370496.0); -} - -#ifdef MT19937_64_MAIN -int main(void) -{ - int i; - unsigned long long init[4]={0x12345ULL, 0x23456ULL, 0x34567ULL, 0x45678ULL}, length=4; - init_by_array64(init, length); - printf("1000 outputs of genrand64_int64()\n"); - for (i=0; i<1000; i++) { - printf("%20llu ", genrand64_int64()); - if (i%5==4) printf("\n"); - } - printf("\n1000 outputs of genrand64_real2()\n"); - for (i=0; i<1000; i++) { - printf("%10.8f ", genrand64_real2()); - if (i%5==4) printf("\n"); - } - return 0; -} -#endif |