blob: d52da6211e86e6e562c3019fd2a3c47539e5d2a4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/******************************************************************************
* Top contributors (to current version):
* Andres Noetzli, Mathias Preiner
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
* in the top-level source directory and their institutional affiliations.
* All rights reserved. See the file COPYING in the top-level source
* directory for licensing information.
* ****************************************************************************
*
* Sampler class that generates random values of different sorts
*
* The Sampler class can be used to generate random values of different sorts
* with biased and unbiased distributions.
*/
#include "cvc5_private.h"
#ifndef CVC5__UTIL_FLOATINGPOINT_SAMPLER_H
#define CVC5__UTIL_FLOATINGPOINT_SAMPLER_H
#include "util/floatingpoint.h"
namespace cvc5 {
class Sampler
{
public:
/**
* Generates a random, uniform bit-vector value.
*/
static BitVector pickBvUniform(unsigned sz);
/**
* Generates a random, uniform floating-point value.
*/
static FloatingPoint pickFpUniform(unsigned e, unsigned s);
/**
* Generates a random floating-point value biased towards special values
* (e.g. +/- inf) and interesting bit-patterns (e.g. values with a zero
* significand).
*/
static FloatingPoint pickFpBiased(unsigned e, unsigned s);
private:
/**
* Probablility with which special floating-point values are picked when
* picking a biased floating-point value
*/
static constexpr double probSpecial = 0.2;
};
} // namespace cvc5
#endif /* CVC5__UTIL_FLOATINGPOINT_SAMPLER_H */
|
