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Only use std::isnan and std::isinf if they are available

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This commit is contained in:
Deanna Hood 2015-04-20 13:14:06 -04:00
parent 085aa8e601
commit 0339502a4f
2 changed files with 47 additions and 15 deletions
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46
Eigen/src/Core/MathFunctions.h
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@ -790,14 +790,26 @@ bool (isfinite)(const std::complex<T>& x)
using std::imag;
return isfinite(real(x)) && isfinite(imag(x));
}
template<typename T>
EIGEN_DEVICE_FUNC
bool (isNaN)(const T& x)
{
#import <iostream>
// Let's be conservative and enable the std::isnan implementation only if we are sure it exists
#if (__cplusplus >= 201103L) && (EIGEN_COMP_GNUC_STRICT || EIGEN_COMP_CLANG || EIGEN_COMP_MSVC || EIGEN_COMP_ICC) \
&& (EIGEN_ARCH_i386_OR_x86_64) && (EIGEN_OS_GNULINUX || EIGEN_OS_WIN_STRICT || EIGEN_OS_MAC) \
|| defined(EIGEN_HAS_C99_MATH)
template<typename T>
EIGEN_DEVICE_FUNC
bool (isNaN)(const T& x)
{
using std::isnan;
return isnan(x);
}
}
#else
template<typename T>
EIGEN_DEVICE_FUNC
bool (isNaN)(const T& x)
{
return x == x;
}
#endif
template<typename T>
EIGEN_DEVICE_FUNC
@ -809,13 +821,25 @@ bool (isNaN)(const std::complex<T>& x)
return isnan(real(x)) || isnan(imag(x));
}
template<typename T>
EIGEN_DEVICE_FUNC
bool (isInf)(const T& x)
{
// Let's be conservative and enable the std::isinf implementation only if we are sure it exists
#if (__cplusplus >= 201103L) && (EIGEN_COMP_GNUC_STRICT || EIGEN_COMP_CLANG || EIGEN_COMP_MSVC || EIGEN_COMP_ICC) \
&& (EIGEN_ARCH_i386_OR_x86_64) && (EIGEN_OS_GNULINUX || EIGEN_OS_WIN_STRICT || EIGEN_OS_MAC) \
|| defined(EIGEN_HAS_C99_MATH)
template<typename T>
EIGEN_DEVICE_FUNC
bool (isInf)(const T& x)
{
using std::isinf;
return isinf(x);
}
}
#else
template<typename T>
EIGEN_DEVICE_FUNC
bool (isInf)(const T& x)
{
return x>NumTraits<T>::highest() || x<NumTraits<T>::lowest();
}
#endif
template<typename T>
EIGEN_DEVICE_FUNC

8
Eigen/src/Core/util/Macros.h
View File

@ -398,6 +398,14 @@
#define EIGEN_HAS_CONSTEXPR 1
#endif
// Does the compiler support C99 math?
#if (EIGEN_COMP_GNUC_STRICT || \
(EIGEN_COMP_ICC && EIGEN_COMP_GNUC) || \
(EIGEN_COMP_CLANG) || \
(EIGEN_COMP_MSVC >= 1800))
#define EIGEN_HAS_C99_MATH 1
#endif
/** Allows to disable some optimizations which might affect the accuracy of the result.
* Such optimization are enabled by default, and set EIGEN_FAST_MATH to 0 to disable them.
* They currently include: