diff options
Diffstat (limited to 'Eigen/src/Core/MathFunctions.h')
| -rw-r--r-- | Eigen/src/Core/MathFunctions.h | 147 |
1 files changed, 5 insertions, 142 deletions
diff --git a/Eigen/src/Core/MathFunctions.h b/Eigen/src/Core/MathFunctions.h index 5b57c2ff2..4ce616746 100644 --- a/Eigen/src/Core/MathFunctions.h +++ b/Eigen/src/Core/MathFunctions.h @@ -251,33 +251,6 @@ inline EIGEN_MATHFUNC_RETVAL(conj, Scalar) conj(const Scalar& x) } /**************************************************************************** -* Implementation of abs * -****************************************************************************/ - -template<typename Scalar> -struct abs_impl -{ - typedef typename NumTraits<Scalar>::Real RealScalar; - static inline RealScalar run(const Scalar& x) - { - using std::abs; - return abs(x); - } -}; - -template<typename Scalar> -struct abs_retval -{ - typedef typename NumTraits<Scalar>::Real type; -}; - -template<typename Scalar> -inline EIGEN_MATHFUNC_RETVAL(abs, Scalar) abs(const Scalar& x) -{ - return EIGEN_MATHFUNC_IMPL(abs, Scalar)::run(x); -} - -/**************************************************************************** * Implementation of abs2 * ****************************************************************************/ @@ -322,6 +295,7 @@ struct norm1_default_impl typedef typename NumTraits<Scalar>::Real RealScalar; static inline RealScalar run(const Scalar& x) { + using std::abs; return abs(real(x)) + abs(imag(x)); } }; @@ -331,6 +305,7 @@ struct norm1_default_impl<Scalar, false> { static inline Scalar run(const Scalar& x) { + using std::abs; return abs(x); } }; @@ -362,6 +337,7 @@ struct hypot_impl { using std::max; using std::min; + using std::abs; RealScalar _x = abs(x); RealScalar _y = abs(y); RealScalar p = (max)(_x, _y); @@ -405,121 +381,6 @@ inline NewType cast(const OldType& x) } /**************************************************************************** -* Implementation of sqrt * -****************************************************************************/ - -template<typename Scalar, bool IsInteger> -struct sqrt_default_impl -{ - static inline Scalar run(const Scalar& x) - { - using std::sqrt; - return sqrt(x); - } -}; - -template<typename Scalar> -struct sqrt_default_impl<Scalar, true> -{ - static inline Scalar run(const Scalar&) - { -#ifdef EIGEN2_SUPPORT - eigen_assert(!NumTraits<Scalar>::IsInteger); -#else - EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar) -#endif - return Scalar(0); - } -}; - -template<typename Scalar> -struct sqrt_impl : sqrt_default_impl<Scalar, NumTraits<Scalar>::IsInteger> {}; - -template<typename Scalar> -struct sqrt_retval -{ - typedef Scalar type; -}; - -template<typename Scalar> -inline EIGEN_MATHFUNC_RETVAL(sqrt, Scalar) sqrt(const Scalar& x) -{ - return EIGEN_MATHFUNC_IMPL(sqrt, Scalar)::run(x); -} - -/**************************************************************************** -* Implementation of standard unary real functions (exp, log, sin, cos, ... * -****************************************************************************/ - -// This macro instanciate all the necessary template mechanism which is common to all unary real functions. -#define EIGEN_MATHFUNC_STANDARD_REAL_UNARY(NAME) \ - template<typename Scalar, bool IsInteger> struct NAME##_default_impl { \ - static inline Scalar run(const Scalar& x) { using std::NAME; return NAME(x); } \ - }; \ - template<typename Scalar> struct NAME##_default_impl<Scalar, true> { \ - static inline Scalar run(const Scalar&) { \ - EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar) \ - return Scalar(0); \ - } \ - }; \ - template<typename Scalar> struct NAME##_impl \ - : NAME##_default_impl<Scalar, NumTraits<Scalar>::IsInteger> \ - {}; \ - template<typename Scalar> struct NAME##_retval { typedef Scalar type; }; \ - template<typename Scalar> \ - inline EIGEN_MATHFUNC_RETVAL(NAME, Scalar) NAME(const Scalar& x) { \ - return EIGEN_MATHFUNC_IMPL(NAME, Scalar)::run(x); \ - } - -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(exp) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(log) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(sin) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(cos) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(tan) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(asin) -EIGEN_MATHFUNC_STANDARD_REAL_UNARY(acos) - -/**************************************************************************** -* Implementation of atan2 * -****************************************************************************/ - -template<typename Scalar, bool IsInteger> -struct atan2_default_impl -{ - typedef Scalar retval; - static inline Scalar run(const Scalar& x, const Scalar& y) - { - using std::atan2; - return atan2(x, y); - } -}; - -template<typename Scalar> -struct atan2_default_impl<Scalar, true> -{ - static inline Scalar run(const Scalar&, const Scalar&) - { - EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar) - return Scalar(0); - } -}; - -template<typename Scalar> -struct atan2_impl : atan2_default_impl<Scalar, NumTraits<Scalar>::IsInteger> {}; - -template<typename Scalar> -struct atan2_retval -{ - typedef Scalar type; -}; - -template<typename Scalar> -inline EIGEN_MATHFUNC_RETVAL(atan2, Scalar) atan2(const Scalar& x, const Scalar& y) -{ - return EIGEN_MATHFUNC_IMPL(atan2, Scalar)::run(x, y); -} - -/**************************************************************************** * Implementation of atanh2 * ****************************************************************************/ @@ -765,11 +626,13 @@ struct scalar_fuzzy_default_impl<Scalar, false, false> template<typename OtherScalar> static inline bool isMuchSmallerThan(const Scalar& x, const OtherScalar& y, const RealScalar& prec) { + using std::abs; return abs(x) <= abs(y) * prec; } static inline bool isApprox(const Scalar& x, const Scalar& y, const RealScalar& prec) { using std::min; + using std::abs; return abs(x - y) <= (min)(abs(x), abs(y)) * prec; } static inline bool isApproxOrLessThan(const Scalar& x, const Scalar& y, const RealScalar& prec) |