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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <random>
// template<class RealType, size_t bits, class URNG>
// RealType generate_canonical(URNG& g);
// XFAIL: *
#include <random>
#include <cassert>
#include "test_macros.h"
#include "truncate_fp.h"
int main(int, char**)
{
{
typedef std::minstd_rand0 E;
typedef float F;
E r;
F f = std::generate_canonical<F, 0>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef float F;
E r;
F f = std::generate_canonical<F, 1>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef float F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits - 1>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef float F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef float F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits + 1>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef double F;
E r;
F f = std::generate_canonical<F, 0>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef double F;
E r;
F f = std::generate_canonical<F, 1>(r);
assert(f == truncate_fp((16807 - E::min()) / (static_cast<F>(E::max() - E::min()) + F(1))));
}
{
typedef std::minstd_rand0 E;
typedef double F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits - 1>(r);
assert(f == truncate_fp(
(16807 - E::min() +
(282475249 - E::min()) * (static_cast<F>(E::max() - E::min()) + F(1))) /
((static_cast<F>(E::max() - E::min()) + F(1)) * (static_cast<F>(E::max() - E::min()) + F(1)))));
}
{
typedef std::minstd_rand0 E;
typedef double F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits>(r);
assert(f == truncate_fp(
(16807 - E::min() +
(282475249 - E::min()) * (static_cast<F>(E::max() - E::min()) + F(1))) /
((static_cast<F>(E::max() - E::min()) + F(1)) * (static_cast<F>(E::max() - E::min()) + F(1)))));
}
{
typedef std::minstd_rand0 E;
typedef double F;
E r;
F f = std::generate_canonical<F, std::numeric_limits<F>::digits + 1>(r);
assert(f == truncate_fp(
(16807 - E::min() +
(282475249 - E::min()) * (static_cast<F>(E::max() - E::min()) + F(1))) /
((static_cast<F>(E::max() - E::min()) + F(1)) * (static_cast<F>(E::max() - E::min()) + F(1)))));
}
return 0;
}
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