mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-29 01:03:45 +00:00
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2018 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_FLOAT2_EXPONENT_HPP
|
|
#define SPROUT_MATH_FLOAT2_EXPONENT_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/limits.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/ilogb2.hpp>
|
|
#include <sprout/math/isnan.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
//
|
|
// float2_exponent
|
|
//
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR int
|
|
float2_exponent(FloatType x) {
|
|
return sprout::math::isnan(x) ? 0
|
|
: x == 0 ? 0
|
|
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity() ? 0
|
|
: sprout::math::ilogb2(x) + 1
|
|
;
|
|
}
|
|
template<
|
|
typename IntType,
|
|
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR int
|
|
float2_exponent(IntType x) {
|
|
return sprout::math::float2_exponent(static_cast<double>(x));
|
|
}
|
|
} // namespace math
|
|
|
|
using sprout::math::float2_exponent;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_FLOAT2_EXPONENT_HPP
|