| // This file is part of Eigen, a lightweight C++ template library |
| // for linear algebra. |
| // |
| // Copyright (C) 2016 Gael Guennebaud <gael.guennebaud@inria.fr> |
| // |
| // This Source Code Form is subject to the terms of the Mozilla |
| // Public License v. 2.0. If a copy of the MPL was not distributed |
| // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| |
| #ifndef EIGEN_SPECIALFUNCTIONS_PACKETMATH_H |
| #define EIGEN_SPECIALFUNCTIONS_PACKETMATH_H |
| |
| #include "./InternalHeaderCheck.h" |
| |
| namespace Eigen { |
| |
| namespace internal { |
| |
| /** \internal \returns the ln(|gamma(\a a)|) (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet plgamma(const Packet& a) { using numext::lgamma; return lgamma(a); } |
| |
| /** \internal \returns the derivative of lgamma, psi(\a a) (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet pdigamma(const Packet& a) { using numext::digamma; return digamma(a); } |
| |
| /** \internal \returns the zeta function of two arguments (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet pzeta(const Packet& x, const Packet& q) { using numext::zeta; return zeta(x, q); } |
| |
| /** \internal \returns the polygamma function (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet ppolygamma(const Packet& n, const Packet& x) { using numext::polygamma; return polygamma(n, x); } |
| |
| /** \internal \returns the erf(\a a) (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet perf(const Packet& a) { using numext::erf; return erf(a); } |
| |
| /** \internal \returns the erfc(\a a) (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet perfc(const Packet& a) { using numext::erfc; return erfc(a); } |
| |
| /** \internal \returns the ndtri(\a a) (coeff-wise) */ |
| template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS |
| Packet pndtri(const Packet& a) { |
| typedef typename unpacket_traits<Packet>::type ScalarType; |
| using internal::generic_ndtri; return generic_ndtri<Packet, ScalarType>(a); |
| } |
| |
| /** \internal \returns the incomplete gamma function igamma(\a a, \a x) */ |
| template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE |
| Packet pigamma(const Packet& a, const Packet& x) { using numext::igamma; return igamma(a, x); } |
| |
| /** \internal \returns the derivative of the incomplete gamma function |
| * igamma_der_a(\a a, \a x) */ |
| template <typename Packet> |
| EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pigamma_der_a(const Packet& a, const Packet& x) { |
| using numext::igamma_der_a; return igamma_der_a(a, x); |
| } |
| |
| /** \internal \returns compute the derivative of the sample |
| * of Gamma(alpha, 1) random variable with respect to the parameter a |
| * gamma_sample_der_alpha(\a alpha, \a sample) */ |
| template <typename Packet> |
| EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pgamma_sample_der_alpha(const Packet& alpha, const Packet& sample) { |
| using numext::gamma_sample_der_alpha; return gamma_sample_der_alpha(alpha, sample); |
| } |
| |
| /** \internal \returns the complementary incomplete gamma function igammac(\a a, \a x) */ |
| template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE |
| Packet pigammac(const Packet& a, const Packet& x) { using numext::igammac; return igammac(a, x); } |
| |
| /** \internal \returns the complementary incomplete gamma function betainc(\a a, \a b, \a x) */ |
| template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE |
| Packet pbetainc(const Packet& a, const Packet& b,const Packet& x) { using numext::betainc; return betainc(a, b, x); } |
| |
| } // end namespace internal |
| |
| } // end namespace Eigen |
| |
| #endif // EIGEN_SPECIALFUNCTIONS_PACKETMATH_H |