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fix fmod

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This commit is contained in:
bolero-MURAKAMI 2013-05-07 13:40:18 +09:00
parent 56cb7702ea
commit 3498e9214f
4 changed files with 123 additions and 23 deletions
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36
sprout/math/rem_quo.hpp
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@ -6,6 +6,9 @@
#include <stdexcept>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/signbit.hpp>
#include <sprout/math/quotient.hpp>
#include <sprout/type_traits/enabler_if.hpp>
#include <sprout/type_traits/float_promote.hpp>
@ -14,17 +17,20 @@
namespace sprout {
namespace math {
namespace detail {
template<typename R, typename FloatType, typename Pair>
inline SPROUT_CONSTEXPR sprout::pair<FloatType, R>
rem_quo_ret(Pair const& p) {
typedef sprout::pair<FloatType, R> type;
return type(static_cast<FloatType>(p.first), p.second);
}
template<typename R, typename T>
inline SPROUT_CONSTEXPR sprout::pair<T, R>
rem_quo_impl(T x, T y, R quo) {
typedef sprout::pair<T, R> type;
return x == std::numeric_limits<T>::infinity() || x == -std::numeric_limits<T>::infinity() || y == 0
? type(std::numeric_limits<T>::quiet_NaN(), quo)
: x == 0 ? type(T(0), quo)
: y == std::numeric_limits<T>::infinity() || y == -std::numeric_limits<T>::infinity() ? type(x, quo)
: type(x - quo * y, quo)
;
return type(x - quo * y, quo);
}
template<
typename R = int,
typename FloatType,
@ -32,9 +38,23 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR sprout::pair<FloatType, R>
rem_quo(FloatType x, FloatType y) {
return sprout::math::detail::rem_quo_impl(x, y, sprout::quotient(x, y));
typedef sprout::pair<FloatType, R> type;
return sprout::math::isnan(y)
? sprout::math::isnan(x)
? sprout::math::signbit(y) || sprout::math::signbit(x) ? type(-std::numeric_limits<FloatType>::quiet_NaN(), R(0))
: type(std::numeric_limits<FloatType>::quiet_NaN(), R(0))
: type(y, R(0))
: x == 0 && y != 0 ? type(FloatType(0), R(0))
: x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity() || y == 0
? type(std::numeric_limits<FloatType>::quiet_NaN(), R(0))
: y == std::numeric_limits<FloatType>::infinity() || y == -std::numeric_limits<FloatType>::infinity() ? type(x, R(0))
: sprout::math::detail::rem_quo_ret<R, FloatType>(sprout::math::detail::rem_quo_impl(
static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x),
static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(y),
sprout::math::quotient<R>(x, y)
))
;
}
template<
typename R = int,
typename ArithmeticType1,