King_DuckZ/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout synced 2025-08-03 12:49:50 +00:00
Code Issues Releases Wiki Activity

fix math functions

Browse source
This commit is contained in:
bolero-MURAKAMI 2013-02-14 18:02:43 +09:00
parent 5d809ef5c9
commit fa1d769bdf
76 changed files with 582 additions and 169 deletions
Download patch file Download diff file Expand all files Collapse all files

11
sprout/math/exp.hpp
View file

@ -2,10 +2,12 @@
#define SPROUT_MATH_EXP_HPP
#include <cstddef>
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/detail/pow.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/factorial.hpp>
#include <sprout/type_traits/enabler_if.hpp>
@ -24,7 +26,7 @@ namespace sprout {
template<typename T>
inline SPROUT_CONSTEXPR T
exp_impl(T x) {
return 1 + sprout::math::detail::exp_impl_1(x, 1, sprout::math::factorial_limit<T>() + 1);
return T(1) + sprout::math::detail::exp_impl_1(x, 1, sprout::math::factorial_limit<T>() / 2 + 1);
}
template<
@ -33,8 +35,11 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
exp(FloatType x) {
typedef double type;
return !(x > -1) ? static_cast<FloatType>(1 / sprout::math::detail::exp_impl(-static_cast<type>(x)))
typedef typename sprout::math::detail::float_compute<FloatType>::type type;
return x == 0 ? FloatType(1)
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: !(x > -1) ? static_cast<FloatType>(type(1) / sprout::math::detail::exp_impl(-static_cast<type>(x)))
: static_cast<FloatType>(sprout::math::detail::exp_impl(static_cast<type>(x)))
;
}