diff options
Diffstat (limited to 'unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h')
| -rw-r--r-- | unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h b/unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h index c6fac91bb..13a72a3ee 100644 --- a/unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h +++ b/unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h @@ -284,6 +284,31 @@ struct functor_traits<scalar_erfc_op<Scalar> > }; /** \internal + * \brief Template functor to compute the Inverse of the normal distribution + * function of a scalar + * \sa class CwiseUnaryOp, Cwise::ndtri() + */ +template<typename Scalar> struct scalar_ndtri_op { + EIGEN_EMPTY_STRUCT_CTOR(scalar_ndtri_op) + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { + using numext::ndtri; return ndtri(a); + } + typedef typename packet_traits<Scalar>::type Packet; + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet packetOp(const Packet& a) const { return internal::pndtri(a); } +}; +template<typename Scalar> +struct functor_traits<scalar_ndtri_op<Scalar> > +{ + enum { + // On average, We are evaluating rational functions with degree N=9 in the + // numerator and denominator. This results in 2*N additions and 2*N + // multiplications. + Cost = 18 * NumTraits<Scalar>::MulCost + 18 * NumTraits<Scalar>::AddCost, + PacketAccess = packet_traits<Scalar>::HasNdtri + }; +}; + +/** \internal * \brief Template functor to compute the exponentially scaled modified Bessel * function of order zero * \sa class CwiseUnaryOp, Cwise::i0e() |