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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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18
sprout/math/fdim.hpp
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@ -1,9 +1,11 @@
#ifndef SPROUT_MATH_FDIM_HPP
#define SPROUT_MATH_FDIM_HPP
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/type_traits/float_promote.hpp>
#include <sprout/type_traits/enabler_if.hpp>
@ -16,9 +18,19 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
fdim(FloatType x, FloatType y) {
return x > y ? x - y : 0;
return sprout::math::isnan(y) ? y
: sprout::math::isnan(x) ? x
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: y == std::numeric_limits<FloatType>::infinity() ? FloatType(0)
: y == -std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::fdim(x, y)
#else
: x > y ? x - y : FloatType(0)
#endif
;
}
template<
typename ArithmeticType1,
typename ArithmeticType2,
@ -33,7 +45,7 @@ namespace sprout {
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::fdim;
using sprout::math::detail::fdim;
} // namespace math
using sprout::math::fdim;