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xoshiro_256_star_star.h
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1/*
2 * SPDX-FileCopyrightText: Copyright 2021, Siavash Ameli <sameli@berkeley.edu>
3 * SPDX-License-Identifier: BSD-3-Clause
4 * SPDX-FileType: SOURCE
5 *
6 * This program is free software: you can redistribute it and/or modify it
7 * under the terms of the license found in the LICENSE.txt file in the root
8 * directory of this source tree.
9 */
10
11
12#ifndef _RANDOM_GENERATOR_XOSHIRO_256_STAR_STAR_H_
13#define _RANDOM_GENERATOR_XOSHIRO_256_STAR_STAR_H_
14
15
16// =======
17// Headers
18// =======
19
20#include <stdint.h> // int64_t, uint64_t, UINT64_C
21
22
23// =====================
24// Xoshiro 256 Star Star
25// =====================
26
48
49class Xoshiro256StarStar
50{
51 public:
52 explicit Xoshiro256StarStar(const int64_t seed);
53 ~Xoshiro256StarStar();
54 uint64_t next();
55 void jump();
56 void long_jump();
57
58 protected:
59 static inline uint64_t rotation_left(
60 const uint64_t x,
61 int k);
62
63 // Member data
64 uint64_t *state;
65};
66
67
68#endif // _RANDOM_GENERATOR_XOSHIRO_256_STAR_STAR_H_
Xoshiro256StarStar
Pseudo-random integer generator. This class generates 64-bit integer using Xoshiro256** algorithm.
Definition xoshiro_256_star_star.h:50
Xoshiro256StarStar::rotation_left
static uint64_t rotation_left(const uint64_t x, int k)
Rotates the bits of a 64 bit integer toward left.
Definition xoshiro_256_star_star.cpp:192
Xoshiro256StarStar::long_jump
void long_jump()
Long jump function for the generator. It is equivalent to 2^192 calls to next(). It can be used to ge...
Definition xoshiro_256_star_star.cpp:145
Xoshiro256StarStar::next
uint64_t next()
Generates the next presudo-random number.
Definition xoshiro_256_star_star.cpp:73
Xoshiro256StarStar::jump
void jump()
Jump function for the generator. It is equivalent to 2^128 calls to next(); it can be used to generat...
Definition xoshiro_256_star_star.cpp:100