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/** |
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* random.h: SIMD oriented Fast Mersenne Twister (SFMT) pseudorandom |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in COPYING. |
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* |
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* |
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* Portions of this file were derived from sources bearing the following license: |
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* Copyright © 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima |
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* University. All rights reserved. |
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* The new BSD License is applied to this software. |
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* |
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* @author Mutsuo Saito (Hiroshima University) |
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* @author Makoto Matsumoto (Hiroshima University) |
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* |
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* $Id: random.h,v 1.4 2007-09-16 18:54:42 pippijn Exp $ |
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*/ |
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|
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#ifndef COMMON_RANDOM_H |
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#define COMMON_RANDOM_H |
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|
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#include <stdio.h> |
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|
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#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) |
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#include <inttypes.h> |
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#elif defined (_MSC_VER) || defined (__BORLANDC__) |
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typedef unsigned int uint32_t; |
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typedef unsigned __int64 uint64_t; |
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#define inline __inline |
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#else |
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#include <inttypes.h> |
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#if defined (__GNUC__) |
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#define inline __inline__ |
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#endif |
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#endif |
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|
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#ifndef PRIu64 |
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#if defined (_MSC_VER) || defined (__BORLANDC__) |
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#define PRIu64 "I64u" |
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#define PRIx64 "I64x" |
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#else |
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#define PRIu64 "lu" |
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#define PRIx64 "lx" |
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#endif |
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#endif |
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|
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#if defined (__GNUC__) |
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#define ALWAYSINLINE __attribute__ ((always_inline)) |
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#endif |
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|
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uint32_t gen_rand32 (void); |
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uint64_t gen_rand64 (void); |
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void fill_array32 (uint32_t *array, int size); |
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void fill_array64 (uint64_t *array, int size); |
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void init_gen_rand (uint32_t seed); |
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void init_by_array (uint32_t *init_key, int key_length); |
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char const * const get_idstring (void); |
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int get_min_array_size32 (void); |
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int get_min_array_size64 (void); |
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|
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/* These real versions are due to Isaku Wada */ |
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/** generates a random number on [0,1]-real-interval */ |
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inline double |
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to_real1 (uint32_t v) |
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{ |
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return v * (1.0/4294967295.0); |
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/* divided by 2^32-1 */ |
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} |
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|
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/** generates a random number on [0,1]-real-interval */ |
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inline double |
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genrand_real1 (void) |
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{ |
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return to_real1 (gen_rand32 ()); |
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} |
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|
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/** generates a random number on [0,1)-real-interval */ |
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inline double |
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to_real2 (uint32_t v) |
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{ |
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return v * (1.0/4294967296.0); |
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/* divided by 2^32 */ |
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} |
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|
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/** generates a random number on [0,1)-real-interval */ |
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inline double |
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genrand_real2 (void) |
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{ |
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return to_real2 (gen_rand32 ()); |
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} |
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|
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/** generates a random number on (0,1)-real-interval */ |
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inline double |
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to_real3 (uint32_t v) |
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{ |
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return ( ((double)v) + 0.5)* (1.0/4294967296.0); |
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/* divided by 2^32 */ |
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} |
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|
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/** generates a random number on (0,1)-real-interval */ |
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inline double |
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genrand_real3 (void) |
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{ |
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return to_real3 (gen_rand32 ()); |
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} |
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/** These real versions are due to Isaku Wada */ |
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|
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/** generates a random number on [0,1) with 53-bit resolution*/ |
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inline double |
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to_res53 (uint64_t v) |
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{ |
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return v * (1.0/18446744073709551616.0L); |
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} |
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|
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/** generates a random number on [0,1) with 53-bit resolution*/ |
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inline double |
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genrand_res53 (void) |
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{ |
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return to_res53 (gen_rand64 ()); |
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} |
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|
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/*------------------------------------------------------ |
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128-bit SIMD data type for Altivec, SSE2 or standard C |
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------------------------------------------------------*/ |
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#if defined (HAVE_ALTIVEC) |
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#if !defined (__APPLE__) |
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#include <altivec.h> |
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#endif |
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/** 128-bit data structure */ |
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union W128_T { |
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vector unsigned int s; |
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uint32_t u[4]; |
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}; |
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/** 128-bit data type */ |
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typedef union W128_T w128_t; |
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|
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#elif defined (HAVE_SSE2) |
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#include <emmintrin.h> |
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|
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/** 128-bit data structure */ |
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union W128_T { |
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__m128i si; |
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uint32_t u[4]; |
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}; |
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/** 128-bit data type */ |
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typedef union W128_T w128_t; |
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|
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#else |
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|
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/** 128-bit data structure */ |
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struct W128_T { |
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uint32_t u[4]; |
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}; |
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/** 128-bit data type */ |
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typedef struct W128_T w128_t; |
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|
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#endif |
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|
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#endif |
