King_DuckZ/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout synced 2025-08-03 12:49:50 +00:00
Code Issues Releases Wiki Activity

fix math functions

Browse source
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
Download patch file Download diff file Expand all files Collapse all files

21
sprout/math/fma.hpp
View file

@ -1,9 +1,13 @@
#ifndef SPROUT_MATH_FMA_HPP
#define SPROUT_MATH_FMA_HPP
#include <limits>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/isinf.hpp>
#include <sprout/math/signbit.hpp>
#include <sprout/type_traits/float_promote.hpp>
#include <sprout/type_traits/enabler_if.hpp>
@ -16,9 +20,20 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
fma(FloatType x, FloatType y, FloatType z) {
return x * y + z;
return sprout::math::isnan(x) ? x
: sprout::math::isnan(y) ? y
: sprout::math::isnan(z) ? z
: sprout::math::isinf(x) && y == 0 ? std::numeric_limits<FloatType>::quiet_NaN()
: sprout::math::isinf(y) && x == 0 ? std::numeric_limits<FloatType>::quiet_NaN()
: (sprout::math::isinf(x) || sprout::math::isinf(y)) && sprout::math::isinf(z) && (sprout::math::signbit(x) ^ sprout::math::signbit(y) ^ sprout::math::signbit(z))
? std::numeric_limits<FloatType>::quiet_NaN()
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::fma(x, y, z)
#else
: x * y + z
#endif
;
}
template<
typename ArithmeticType1,
typename ArithmeticType2,
@ -40,7 +55,7 @@ namespace sprout {
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::fma;
using sprout::math::detail::fma;
} // namespace math
using sprout::math::fma;