mirror/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout.git synced 2025-07-14 15:04:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

add math::copysign

Browse source 
fix hyperbolic and exponental functions: for special values
This commit is contained in:
bolero-MURAKAMI 2013-04-24 22:48:36 +09:00
parent a27c83e939
commit 32c3ba02d4
50 changed files with 540 additions and 216 deletions
Download patch file Download diff file Expand all files Collapse all files

32
sprout/math/exp2.hpp
View file

@ -5,26 +5,37 @@
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/exp.hpp>
#include <sprout/math/constants.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
exp2_impl(T x) {
return sprout::math::exp(x * sprout::math::ln_two<T>());
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
exp2(FloatType x) {
return x == 0 ? FloatType(1)
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(0)
return x == -std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: sprout::exp(x * sprout::math::ln_two<FloatType>())
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::exp2(x)
#else
: x == 0 ? FloatType(1)
: static_cast<FloatType>(sprout::math::detail::exp2_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::exp2(static_cast<double>(x));
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::exp2;
//
// exp2
//
template<
typename ArithmeticType,
typename sprout::enabler_if<std::is_arithmetic<ArithmeticType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType>::type
exp2(ArithmeticType x) {
return sprout::math::detail::exp2(x);
}
} // namespace math
using sprout::math::exp2;