mirror of
https://github.com/boostorg/multiprecision.git
synced 2026-02-02 21:12:11 +00:00
94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
///////////////////////////////////////////////////////////////
|
|
// Copyright 2013 John Maddock. Distributed under the Boost
|
|
// Software License, Version 1.0. (See accompanying file
|
|
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
|
|
|
|
//
|
|
// Compare arithmetic results using fixed_int to GMP results.
|
|
//
|
|
|
|
#ifdef _MSC_VER
|
|
# define _SCL_SECURE_NO_WARNINGS
|
|
#endif
|
|
|
|
#include <boost/multiprecision/cpp_dec_float.hpp>
|
|
#include <boost/random/mersenne_twister.hpp>
|
|
#include <boost/random/uniform_int.hpp>
|
|
#include <boost/timer.hpp>
|
|
#include "test.hpp"
|
|
|
|
#include <iostream>
|
|
#include <iomanip>
|
|
#include <sstream>
|
|
#include <boost/archive/text_iarchive.hpp>
|
|
#include <boost/archive/text_oarchive.hpp>
|
|
|
|
template <class T>
|
|
T generate_random(unsigned bits_wanted)
|
|
{
|
|
typedef typename T::backend_type::exponent_type e_type;
|
|
static boost::random::mt19937 gen;
|
|
T val = gen();
|
|
T prev_val = -1;
|
|
while(val != prev_val)
|
|
{
|
|
val *= (gen.max)();
|
|
prev_val = val;
|
|
val += gen();
|
|
}
|
|
e_type e;
|
|
val = frexp(val, &e);
|
|
|
|
static boost::random::uniform_int_distribution<e_type> ui(std::numeric_limits<T>::min_exponent + 1, std::numeric_limits<T>::max_exponent - 1);
|
|
return ldexp(val, ui(gen));
|
|
}
|
|
|
|
template <class T>
|
|
void test()
|
|
{
|
|
boost::timer tim;
|
|
|
|
while(true)
|
|
{
|
|
T val = generate_random<T>(boost::math::tools::digits<T>());
|
|
std::stringstream ss;
|
|
boost::archive::text_oarchive oa(ss);
|
|
oa << static_cast<const T&>(val);
|
|
boost::archive::text_iarchive ia(ss);
|
|
T val2;
|
|
ia >> val2;
|
|
BOOST_CHECK_EQUAL(val, val2);
|
|
//
|
|
// Check to see if test is taking too long.
|
|
// Tests run on the compiler farm time out after 300 seconds,
|
|
// so don't get too close to that:
|
|
//
|
|
if(tim.elapsed() > 150)
|
|
{
|
|
std::cout << "Timeout reached, aborting tests now....\n";
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if !defined(TEST1) && !defined(TEST2)
|
|
# define TEST1
|
|
# define TEST2
|
|
#endif
|
|
|
|
|
|
int main()
|
|
{
|
|
using namespace boost::multiprecision;
|
|
#ifdef TEST1
|
|
test<cpp_dec_float_50>();
|
|
#endif
|
|
#ifndef TEST2
|
|
test<number<cpp_dec_float<100, boost::int64_t, std::allocator<void> > > >();
|
|
#endif
|
|
return boost::report_errors();
|
|
}
|
|
|
|
|
|
|