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NE10_random.h
/*
* Copyright 2012-15 ARM Limited and Contributors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of ARM Limited nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LIMITED 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 ARM LIMITED AND 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.
*/
/*
* NE10 Library : test/include/NE10_random.h
*/
#ifndef __NE10_RANDOM__
#define __NE10_RANDOM__
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <float.h>
#include <math.h>
#include <assert.h>
// used for creating different instances of random number generators with different seeds and states
typedef struct
{
// these are used as internal values, please do not change them directly
uint32_t _private_m_A ;// = 1103515245L; // a, must be 0 < _A < _M
uint32_t _private_m_C ;// = 12345L; // c, must be 0 < _C < _M
uint32_t _private_m_X_NM1 ;// = 0; // X(n-1), at first this value is the seed or the start value
} NE10_rng_t;
typedef struct
{
// these are used as internal values, please do not change them directly
// there are three separate seeds for 1) the sign, 2) the exponent, 3) and the fraction bits.
NE10_rng_t _private_m_rngs[3];
} NE10_float_rng_t;
// a random number generator that generates IEEE 754 float numbers
// NAN_OR_INF is to check whether the value is a NAN or an INF
#define NAN_OR_INF (0xFF << 23)
#define IS_NAN_OR_INF(x) ( ((x & NAN_OR_INF) == NAN_OR_INF)?1:0 )
#define EXPONENT_MASK 0x807FFFFF
#define IS_SUBNORMAL(x) ( ((x & EXPONENT_MASK) == x)?1:0 )
// generic functions
extern void NE10_rng_init_g (NE10_rng_t *rng, uint32_t seed);
extern uint32_t NE10_rng_next_g (NE10_rng_t *rng);
extern const uint32_t NE10_rng_max_g (NE10_rng_t *rng);
extern void NE10_rng_init (uint32_t seed);
extern uint32_t NE10_rng_next();
extern const uint32_t NE10_rng_max();
extern void NE10_float_rng_init_g (NE10_float_rng_t* float_rng, uint32_t seed);
extern float NE10_float_rng_next_g (NE10_float_rng_t* float_rng);
extern float NE10_float_rng_max_g (NE10_float_rng_t* float_rng);
extern void NE10_float_rng_init (uint32_t seed);
extern float NE10_float_rng_next();
extern float NE10_float_rng_max();
extern void NE10_float_rng_limit_init (uint32_t seed);
extern float NE10_float_rng_limit_next();
extern float NE10_float_rng_limit_max();
extern void NE10_float_rng_limit_gt1_init (uint32_t seed);
extern float NE10_float_rng_limit_gt1_next();
extern float NE10_float_rng_limit_gt1_max();
#endif // NE10_RANDOM
NE10_float_rng_t
Definition NE10_random.h:54
NE10_rng_t
Definition NE10_random.h:46