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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-04-26 00:25:35 +09:00
parent dad3acceea
commit 2e2b6c96ab
30 changed files with 121 additions and 84 deletions
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22
sprout/math/float2_sig_exp.hpp
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@ -1,12 +1,14 @@
#ifndef SPROUT_MATH_FLOAT2_SIG_EXP_HPP
#define SPROUT_MATH_FLOAT2_SIG_EXP_HPP
#include <climits>
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/detail/pow.hpp>
#include <sprout/math/float2_exponent.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/ilogb2.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/utility/pair/pair.hpp>
@ -17,12 +19,7 @@ namespace sprout {
inline SPROUT_CONSTEXPR sprout::pair<T, int>
float2_sig_exp_impl(T x, int exp) {
typedef sprout::pair<T, int> type;
return x == 0 ? type(T(0), exp)
: x == std::numeric_limits<T>::infinity() ? type(std::numeric_limits<T>::infinity(), exp)
: x == -std::numeric_limits<T>::infinity() ? type(-std::numeric_limits<T>::infinity(), exp)
: x == std::numeric_limits<T>::quiet_NaN() ? type(std::numeric_limits<T>::quiet_NaN(), exp)
: type(x / sprout::detail::pow_n(T(2), exp), exp)
;
return type(x / sprout::detail::pow_n(T(2), exp), exp);
}
template<
@ -31,9 +28,14 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR sprout::pair<FloatType, int>
float2_sig_exp(FloatType x) {
return sprout::math::detail::float2_sig_exp_impl(x, sprout::math::float2_exponent(x));
typedef sprout::pair<FloatType, int> type;
return x == std::numeric_limits<FloatType>::infinity() ? type(std::numeric_limits<FloatType>::infinity(), 0)
: x == -std::numeric_limits<FloatType>::infinity() ? type(-std::numeric_limits<FloatType>::infinity(), 0)
: sprout::math::isnan(x) ? type(std::numeric_limits<FloatType>::quiet_NaN(), FP_ILOGBNAN)
: x == 0 ? type(x, 0)
: sprout::math::detail::float2_sig_exp_impl(x, sprout::math::ilogb2(x) + 1)
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler