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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-05-06 00:22:08 +09:00
parent fccb16687b
commit 7794e56192
27 changed files with 342 additions and 102 deletions
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24
sprout/math/cbrt.hpp
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@ -5,24 +5,38 @@
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/pow.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/constants.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/pow.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR T
cbrt_impl(T x) {
return x < 0 ? -sprout::pow(-x, sprout::math::third<T>())
: sprout::pow(x, sprout::math::third<T>())
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
cbrt(FloatType x) {
return x == 0 ? FloatType(0)
return sprout::math::isnan(x) ? x
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: x == -std::numeric_limits<FloatType>::infinity() ? -std::numeric_limits<FloatType>::infinity()
: x < 0 ? -sprout::pow(-x, sprout::math::third<FloatType>())
: sprout::pow(x, sprout::math::third<FloatType>())
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::cbrt(x)
#else
: x == 0 ? x
: static_cast<FloatType>(sprout::math::detail::cbrt_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
#endif
;
}
@ -36,7 +50,7 @@ namespace sprout {
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::cbrt;
using sprout::math::detail::cbrt;
} // namespace math
using sprout::math::cbrt;