mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
#ifndef SPROUT_MATH_ERFC_HPP
|
|
#define SPROUT_MATH_ERFC_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/detail/float_compute.hpp>
|
|
#include <sprout/math/isnan.hpp>
|
|
#include <sprout/math/erf.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
template<typename T>
|
|
inline SPROUT_CONSTEXPR T
|
|
erfc_impl(T x) {
|
|
return T(1) - sprout::math::erf(x);
|
|
}
|
|
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR FloatType
|
|
erfc(FloatType x) {
|
|
return sprout::math::isnan(x) ? x
|
|
: x == std::numeric_limits<FloatType>::infinity() ? FloatType(0)
|
|
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(2)
|
|
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
|
|
: std::erfc(x)
|
|
#else
|
|
: static_cast<FloatType>(sprout::math::detail::erfc_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
|
|
#endif
|
|
;
|
|
}
|
|
template<
|
|
typename IntType,
|
|
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR double
|
|
erfc(IntType x) {
|
|
return sprout::math::detail::erfc(static_cast<double>(x));
|
|
}
|
|
} // namespace detail
|
|
|
|
using sprout::math::detail::erfc;
|
|
} // namespace math
|
|
|
|
using sprout::math::erfc;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_ERFC_HPP
|