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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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56
sprout/math/fabs.hpp
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@ -18,28 +18,48 @@
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
fabs(FloatType x) {
return sprout::math::isnan(x) ? sprout::numeric_limits<FloatType>::quiet_NaN()
: x == 0 ? FloatType(0)
: sprout::math::copysign(x, FloatType(0))
;
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
inline SPROUT_CONSTEXPR float
builtin_fabs(float x) {
return __builtin_fabsf(x);
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
fabs(IntType x) {
return sprout::math::detail::fabs(static_cast<double>(x));
builtin_fabs(double x) {
return __builtin_fabs(x);
}
inline SPROUT_CONSTEXPR long double
builtin_fabs(long double x) {
return __builtin_fabsl(x);
}
#endif
} // namespace detail
using NS_SPROUT_MATH_DETAIL::fabs;
//
// fabs
//
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR FloatType
fabs(FloatType x) {
return
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
sprout::math::detail::builtin_fabs(x)
#else
sprout::math::isnan(x) ? sprout::numeric_limits<FloatType>::quiet_NaN()
: x == 0 ? FloatType(0)
: sprout::math::copysign(x, FloatType(0))
#endif
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
fabs(IntType x) {
return sprout::math::fabs(static_cast<double>(x));
}
} // namespace math
using sprout::math::fabs;