mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2019 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
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_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_MATH_ISSUBNORMAL_HPP
|
|
#define SPROUT_MATH_ISSUBNORMAL_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/limits.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
#include <sprout/math/iszero.hpp>
|
|
#include <sprout/math/isnan.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
//
|
|
// issubnormal_or_zero
|
|
//
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR bool
|
|
issubnormal_or_zero(FloatType x) {
|
|
return x > 0
|
|
? x < sprout::numeric_limits<double>::min()
|
|
: x > -sprout::numeric_limits<double>::min()
|
|
;
|
|
}
|
|
} // namespace detail
|
|
//
|
|
// issubnormal
|
|
//
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR bool
|
|
issubnormal SPROUT_PREVENT_MACRO_SUBSTITUTION (FloatType x) {
|
|
return !sprout::math::isnan(x)
|
|
&& !sprout::math::iszero(x)
|
|
&& sprout::math::detail::issubnormal_or_zero(x)
|
|
;
|
|
}
|
|
} // namespace math
|
|
|
|
using sprout::math::issubnormal;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_ISSUBNORMAL_HPP
|