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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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34
sprout/math/tan.hpp
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@ -5,26 +5,37 @@
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/sin.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/cos.hpp>
#include <sprout/math/sin.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/type_traits/float_promote.hpp>
namespace sprout {
namespace math {
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR T
tan_impl(T x) {
return sprout::math::sin(x) / sprout::math::cos(x);
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
tan(FloatType x) {
return x == 0 ? FloatType(0)
: x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity()
return x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity()
? std::numeric_limits<FloatType>::quiet_NaN()
: sprout::sin(x) / sprout::cos(x)
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::sin(x)
#else
: x == 0 ? FloatType(0)
: static_cast<FloatType>(sprout::math::detail::tan_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
@ -34,8 +45,17 @@ namespace sprout {
return sprout::math::detail::tan(static_cast<double>(x));
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::tan;
//
// tan
//
template<
typename ArithmeticType,
typename sprout::enabler_if<std::is_arithmetic<ArithmeticType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType>::type
tan(ArithmeticType x) {
return sprout::math::detail::tan(x);
}
} // namespace math
using sprout::math::tan;