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fix erf, erfc

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fix for special values: trigonometric functions
This commit is contained in:
bolero-MURAKAMI 2013-04-23 23:07:20 +09:00
parent 5f40808f75
commit a27c83e939
12 changed files with 313 additions and 87 deletions
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24
sprout/math/atan.hpp
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@ -11,6 +11,7 @@
#include <sprout/math/constants.hpp>
#include <sprout/math/factorial.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/type_traits/float_promote.hpp>
namespace sprout {
namespace math {
@ -41,17 +42,19 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
atan(FloatType x) {
typedef typename sprout::math::detail::float_compute<FloatType>::type type;
return x == 0 ? FloatType(0)
: x == std::numeric_limits<FloatType>::infinity() ? sprout::math::half_pi<FloatType>()
: x == -std::numeric_limits<FloatType>::infinity() ? -sprout::math::half_pi<FloatType>()
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::atan(x)
#else
: static_cast<FloatType>(
x < 0 ? -sprout::math::detail::atan_impl(static_cast<type>(-x))
: sprout::math::detail::atan_impl(static_cast<type>(x))
x < 0 ? -sprout::math::detail::atan_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(-x))
: sprout::math::detail::atan_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
@ -61,8 +64,17 @@ namespace sprout {
return sprout::math::detail::atan(static_cast<double>(x));
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::atan;
//
// atan
//
template<
typename ArithmeticType,
typename sprout::enabler_if<std::is_arithmetic<ArithmeticType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType>::type
atan(ArithmeticType x) {
return sprout::math::detail::atan(x);
}
} // namespace math
using sprout::math::atan;