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fix: math functions (support for inferior C++14 standard)

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add C++14 constexpr modifying algorithms
This commit is contained in:
bolero-MURAKAMI 2013-10-25 12:29:16 +09:00
parent 58cff54e0d
commit c58c9cc0fc
106 changed files with 3465 additions and 2144 deletions
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79
sprout/math/fmax.hpp
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@ -19,41 +19,56 @@
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 FloatType
fmax(FloatType x, FloatType y) {
return sprout::math::isnan(y) ? x
: sprout::math::isnan(x) ? y
: y == -sprout::numeric_limits<FloatType>::infinity() ? x
: x == sprout::numeric_limits<FloatType>::infinity() ? x
: x == -sprout::numeric_limits<FloatType>::infinity() ? y
: y == sprout::numeric_limits<FloatType>::infinity() ? y
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: x == 0 && y == 0 ? x
: std::fmax(x, y)
#else
: x < y ? y : x
inline SPROUT_CONSTEXPR float
builtin_fmax(float x, float y) {
return __builtin_fmaxf(x, y);
}
inline SPROUT_CONSTEXPR double
builtin_fmax(double x, double y) {
return __builtin_fmax(x, y);
}
inline SPROUT_CONSTEXPR long double
builtin_fmax(long double x, long double y) {
return __builtin_fmaxl(x, y);
}
#endif
;
}
template<
typename ArithmeticType1,
typename ArithmeticType2,
typename sprout::enabler_if<
std::is_arithmetic<ArithmeticType1>::value && std::is_arithmetic<ArithmeticType2>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type
fmax(ArithmeticType1 x, ArithmeticType2 y) {
typedef typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type type;
return sprout::math::detail::fmax(static_cast<type>(x), static_cast<type>(y));
}
} // namespace detail
using sprout::math::detail::fmax;
//
// fmax
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
fmax(FloatType x, FloatType y) {
return sprout::math::isnan(y) ? x
: sprout::math::isnan(x) ? y
: y == -sprout::numeric_limits<FloatType>::infinity() ? x
: x == sprout::numeric_limits<FloatType>::infinity() ? x
: x == -sprout::numeric_limits<FloatType>::infinity() ? y
: y == sprout::numeric_limits<FloatType>::infinity() ? y
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: x == 0 && y == 0 ? x
: sprout::math::detail::builtin_fmax(x, y)
#else
: x < y ? y : x
#endif
;
}
template<
typename ArithmeticType1,
typename ArithmeticType2,
typename sprout::enabler_if<
std::is_arithmetic<ArithmeticType1>::value && std::is_arithmetic<ArithmeticType2>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type
fmax(ArithmeticType1 x, ArithmeticType2 y) {
typedef typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type type;
return sprout::math::fmax(static_cast<type>(x), static_cast<type>(y));
}
} // namespace math
using sprout::math::fmax;