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add math::lgamma

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This commit is contained in:
bolero-MURAKAMI 2013-04-23 19:03:03 +09:00
parent a55c430f09
commit 5f40808f75
58 changed files with 323 additions and 116 deletions
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10
sprout/math/logb2.hpp
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@ -27,7 +27,7 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
logb2(FloatType x) {
return sprout::math::logb(x);
return sprout::logb(x);
}
template<
@ -36,7 +36,7 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR double
logb2(IntType x) {
return sprout::math::logb(x);
return sprout::logb(x);
}
#else
template<typename T>
@ -104,7 +104,7 @@ namespace sprout {
inline SPROUT_CONSTEXPR T
logb2_impl(T x, T exp) {
return sprout::math::detail::logb2_impl_1(
x, sprout::detail::pow_n(T(2), sprout::math::itrunc<std::intmax_t>(exp)), exp
x, sprout::detail::pow_n(T(2), sprout::itrunc<std::intmax_t>(exp)), exp
);
}
@ -117,8 +117,8 @@ namespace sprout {
return x == 0 ? -std::numeric_limits<FloatType>::infinity()
: x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity()
? std::numeric_limits<FloatType>::infinity()
: x < 0 ? sprout::math::detail::logb2_impl(-x, sprout::math::trunc(sprout::math::log_a(FloatType(2), -x)))
: sprout::math::detail::logb2_impl(x, sprout::math::trunc(sprout::math::log_a(FloatType(2), x)))
: x < 0 ? sprout::math::detail::logb2_impl(-x, sprout::trunc(sprout::log_a(FloatType(2), -x)))
: sprout::math::detail::logb2_impl(x, sprout::trunc(sprout::log_a(FloatType(2), x)))
;
}