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pippijn |
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/** |
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* @file random.h |
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* |
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* @brief SIMD oriented Fast Mersenne Twister(SFMT) pseudorandom |
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* number generator |
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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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* Copyright (C) 2006, 2007 Mutsuo Saito, Makoto Matsumoto and Hiroshima |
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* University. All rights reserved. |
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* |
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* The new BSD License is applied to this software. |
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* see LICENSE.txt |
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* |
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* @note We assume that your system has inttypes.h. If your system |
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* doesn't have inttypes.h, you have to typedef uint32_t and uint64_t, |
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* and you have to define PRIu64 and PRIx64 in this file as follows: |
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* @verbatim |
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typedef unsigned int uint32_t |
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typedef unsigned long long uint64_t |
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#define PRIu64 "llu" |
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#define PRIx64 "llx" |
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@endverbatim |
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* uint32_t must be exactly 32-bit unsigned integer type (no more, no |
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* less), and uint64_t must be exactly 64-bit unsigned integer type. |
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* PRIu64 and PRIx64 are used for printf function to print 64-bit |
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* unsigned int and 64-bit unsigned int in hexadecimal format. |
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*/ |
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#ifndef COMMON_RANDOM_H |
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#define COMMON_RANDOM_H |
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#include <stdio.h> |
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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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#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 "llu" |
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#define PRIx64 "llx" |
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#endif |
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#endif |
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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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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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const char *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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/* 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 static double 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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/** generates a random number on [0,1]-real-interval */ |
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inline static double genrand_real1(void) |
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{ |
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return to_real1(gen_rand32()); |
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} |
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/** generates a random number on [0,1)-real-interval */ |
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inline static double 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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/** generates a random number on [0,1)-real-interval */ |
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inline static double genrand_real2(void) |
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{ |
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return to_real2(gen_rand32()); |
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} |
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/** generates a random number on (0,1)-real-interval */ |
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inline static double 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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/** generates a random number on (0,1)-real-interval */ |
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inline static double 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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/** generates a random number on [0,1) with 53-bit resolution*/ |
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inline static double 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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/** generates a random number on [0,1) with 53-bit resolution*/ |
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inline static double 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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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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#elif defined(HAVE_SSE2) |
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#include <emmintrin.h> |
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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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#else |
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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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#endif |
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#endif |
