mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2014 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_FABS_HPP
|
|
#define SPROUT_MATH_FABS_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/isnan.hpp>
|
|
#include <sprout/math/copysign.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
|
|
inline SPROUT_CONSTEXPR float
|
|
builtin_fabs(float x) {
|
|
return __builtin_fabsf(x);
|
|
}
|
|
inline SPROUT_CONSTEXPR double
|
|
builtin_fabs(double x) {
|
|
return __builtin_fabs(x);
|
|
}
|
|
inline SPROUT_CONSTEXPR long double
|
|
builtin_fabs(long double x) {
|
|
return __builtin_fabsl(x);
|
|
}
|
|
#endif
|
|
} // namespace detail
|
|
//
|
|
// fabs
|
|
//
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR FloatType
|
|
fabs(FloatType x) {
|
|
return
|
|
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
|
|
sprout::math::detail::builtin_fabs(x)
|
|
#else
|
|
sprout::math::isnan(x) ? sprout::numeric_limits<FloatType>::quiet_NaN()
|
|
: x == 0 ? FloatType(0)
|
|
: sprout::math::copysign(x, FloatType(0))
|
|
#endif
|
|
;
|
|
}
|
|
template<
|
|
typename IntType,
|
|
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR double
|
|
fabs(IntType x) {
|
|
return sprout::math::fabs(static_cast<double>(x));
|
|
}
|
|
} // namespace math
|
|
|
|
using sprout::math::fabs;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_FABS_HPP
|