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add math/classifications.hpp

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bolero-MURAKAMI 2012-05-10 13:34:49 +09:00
parent 6bb2d0fb87
commit 64b422546e
35 changed files with 335 additions and 31 deletions
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43
sprout/math/issubnormal.hpp Normal file
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#ifndef SPROUT_MATH_ISSUBNORMAL_HPP
#define SPROUT_MATH_ISSUBNORMAL_HPP
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/utility/enabler_if.hpp>
#include <sprout/math/iszero.hpp>
namespace sprout {
namespace math {
namespace detail {
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR int
issubnormal_or_zero(FloatType x) {
return x > 0
? x < std::numeric_limits<double>::min()
: x > -std::numeric_limits<double>::min()
;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR int
issubnormal(FloatType x) {
return !sprout::math::iszero(x)
&& sprout::math::detail::issubnormal_or_zero(x)
;
}
} // namespace detail
using sprout::math::detail::issubnormal;
} // namespace math
using sprout::math::issubnormal;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_ISSUBNORMAL_HPP