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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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20
sprout/math/erfc.hpp
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@ -4,24 +4,36 @@
#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 x == std::numeric_limits<FloatType>::infinity() ? FloatType(0)
return sprout::math::isnan(x) ? x
: x == std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(2)
: FloatType(1) - sprout::erf(x)
#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
@ -32,7 +44,7 @@ namespace sprout {
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::erfc;
using sprout::math::detail::erfc;
} // namespace math
using sprout::math::erfc;