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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-05-08 01:46:40 +09:00
parent 3498e9214f
commit 9247693c63
13 changed files with 159 additions and 67 deletions
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34
sprout/math/remainder.hpp
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@ -3,48 +3,38 @@
#include <limits>
#include <type_traits>
#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/round.hpp>
#include <sprout/math/rem_quo.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
remainder_impl(T x, T y) {
return x - sprout::math::round(x / y) * y;
}
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
remainder(FloatType x, FloatType y) {
return sprout::math::isnan(y)
return y == 0 ? -std::numeric_limits<FloatType>::quiet_NaN()
: sprout::math::isnan(y)
? sprout::math::isnan(x)
? sprout::math::signbit(y) || sprout::math::signbit(x) ? -std::numeric_limits<FloatType>::quiet_NaN()
? sprout::math::signbit(y) && sprout::math::signbit(x) ? -std::numeric_limits<FloatType>::quiet_NaN()
: std::numeric_limits<FloatType>::quiet_NaN()
: y
: sprout::math::isnan(x) ? x
: x == 0 && y != 0 ? x
: x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity() || y == 0
? std::numeric_limits<FloatType>::quiet_NaN()
: x == std::numeric_limits<FloatType>::infinity() || x == -std::numeric_limits<FloatType>::infinity()
? -std::numeric_limits<FloatType>::quiet_NaN()
: x == 0 ? x
: y == std::numeric_limits<FloatType>::infinity() || y == -std::numeric_limits<FloatType>::infinity() ? x
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::remainder(x, y)
#else
: static_cast<FloatType>(sprout::math::detail::remainder_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::rem_quo(x, y).first
#endif
;
}
@ -61,8 +51,12 @@ namespace sprout {
return sprout::math::detail::remainder(static_cast<type>(x), static_cast<type>(y));
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::remainder;
//
// issue:
// remainder(-NaN, -NaN) returns -NaN .
// # returns +NaN . ( same as remainder(+NaN, +NaN) )
//
using sprout::math::detail::remainder;
} // namespace math
using sprout::math::remainder;