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
|
// (C) Copyright Nick Thompson 2021.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <random>
#include <array>
#include <vector>
#include <iostream>
#include <benchmark/benchmark.h>
#include <boost/math/tools/cubic_roots.hpp>
using boost::math::tools::cubic_roots;
template<class Real>
void CubicRoots(benchmark::State& state)
{
std::random_device rd;
auto seed = rd();
// This seed generates 3 real roots:
//uint32_t seed = 416683252;
std::mt19937_64 mt(seed);
std::uniform_real_distribution<Real> unif(-10, 10);
Real a = unif(mt);
Real b = unif(mt);
Real c = unif(mt);
Real d = unif(mt);
for (auto _ : state)
{
auto roots = cubic_roots(a,b,c,d);
benchmark::DoNotOptimize(roots[0]);
}
}
BENCHMARK_TEMPLATE(CubicRoots, float);
BENCHMARK_TEMPLATE(CubicRoots, double);
BENCHMARK_TEMPLATE(CubicRoots, long double);
BENCHMARK_MAIN();
|
