Eigen::internal::std_fallback Namespace Reference

Functions
template<typename Scalar >
EIGEN_DEVICE_FUNC Scalar	log1p (const Scalar &x)

Function Documentation

log1p()

template<typename Scalar >

EIGEN_DEVICE_FUNC Scalar Eigen::internal::std_fallback::log1p ( const Scalar &  x )

inline

                                                         {
    EIGEN_STATIC_ASSERT_NON_INTEGER(Scalar)
    typedef typename NumTraits<Scalar>::Real RealScalar;
    EIGEN_USING_STD_MATH(log);
    Scalar x1p = RealScalar(1) + x;
    return numext::equal_strict(x1p, Scalar(1)) ? x : x * ( log(x1p) / (x1p - RealScalar(1)) );
  }

References EIGEN_STATIC_ASSERT_NON_INTEGER, Eigen::numext::equal_strict(), and log().

Referenced by Eigen::internal::log1p_impl< Scalar >::run().

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