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fix: math functions (support for inferior C++14 standard)

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add C++14 constexpr modifying algorithms
This commit is contained in:
bolero-MURAKAMI 2013-10-25 12:29:16 +09:00
parent 58cff54e0d
commit c58c9cc0fc
106 changed files with 3465 additions and 2144 deletions
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71
sprout/math/logb.hpp
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@ -25,6 +25,21 @@
namespace sprout {
namespace math {
namespace detail {
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
inline SPROUT_CONSTEXPR float
builtin_logb(float x) {
return __builtin_logbf(x);
}
inline SPROUT_CONSTEXPR double
builtin_logb(double x) {
return __builtin_logb(x);
}
inline SPROUT_CONSTEXPR long double
builtin_logb(long double x) {
return __builtin_logbl(x);
}
#endif
template<typename T>
inline SPROUT_CONSTEXPR T
logb_impl_3_neg_lo(T x, T x0, T base, T exp) {
@ -100,39 +115,39 @@ namespace sprout {
: sprout::math::detail::logb_impl_1(x, sprout::math::trunc(sprout::math::log_a(T(sprout::numeric_limits<T>::radix), x)))
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb(FloatType x) {
return sprout::math::isnan(x) ? x
: x == 0 ? -sprout::numeric_limits<FloatType>::infinity()
} // namespace detail
//
// logb
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb(FloatType x) {
return sprout::math::isnan(x) ? x
: x == 0 ? -sprout::numeric_limits<FloatType>::infinity()
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
# if defined(__GNUC__)
: x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
: x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
# endif
: std::logb(x)
: sprout::math::detail::builtin_logb(x)
#else
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
: static_cast<FloatType>(sprout::math::detail::logb_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
: static_cast<FloatType>(sprout::math::detail::logb_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
logb(IntType x) {
return sprout::math::detail::logb(static_cast<double>(x));
}
} // namespace detail
using sprout::math::detail::logb;
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
logb(IntType x) {
return sprout::math::logb(static_cast<double>(x));
}
} // namespace math
using sprout::math::logb;