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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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87
sprout/math/logb2.hpp
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@ -28,25 +28,28 @@
namespace sprout {
namespace math {
namespace detail {
#if SPROUT_FLT_RADIX_IS_2
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb2(FloatType x) {
return sprout::math::logb(x);
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
logb2(IntType x) {
return sprout::math::logb(x);
}
//
// logb2
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb2(FloatType x) {
return sprout::math::logb(x);
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
logb2(IntType x) {
return sprout::math::logb(x);
}
#else
namespace detail {
template<typename T>
inline SPROUT_CONSTEXPR T
logb2_impl_3_neg_lo(T x, T x0, T base, T exp) {
@ -122,32 +125,32 @@ namespace sprout {
: sprout::math::detail::logb2_impl_1(x, sprout::math::trunc(sprout::math::log_a(T(2), x)))
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb2(FloatType x) {
return sprout::math::isnan(x) ? x
: x == 0 ? -sprout::numeric_limits<FloatType>::infinity()
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
: static_cast<FloatType>(sprout::math::detail::logb2_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
logb2(IntType x) {
return sprout::math::detail::logb2(static_cast<double>(x));
}
#endif
} // namespace detail
using sprout::math::detail::logb2;
//
// logb2
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
logb2(FloatType x) {
return sprout::math::isnan(x) ? x
: x == 0 ? -sprout::numeric_limits<FloatType>::infinity()
: x == sprout::numeric_limits<FloatType>::infinity() || x == -sprout::numeric_limits<FloatType>::infinity()
? sprout::numeric_limits<FloatType>::infinity()
: static_cast<FloatType>(sprout::math::detail::logb2_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
logb2(IntType x) {
return sprout::math::logb2(static_cast<double>(x));
}
#endif
} // namespace math
using sprout::math::logb2;