1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2016 Gael Guennebaud <gael.guennebaud@inria.fr>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #ifndef EIGEN_SPECIALFUNCTIONS_PACKETMATH_H
11 #define EIGEN_SPECIALFUNCTIONS_PACKETMATH_H
12
13 namespace Eigen {
14
15 namespace internal {
16
17 /** \internal \returns the ln(|gamma(\a a)|) (coeff-wise) */
18 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
plgamma(const Packet & a)19 Packet plgamma(const Packet& a) { using numext::lgamma; return lgamma(a); }
20
21 /** \internal \returns the derivative of lgamma, psi(\a a) (coeff-wise) */
22 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
pdigamma(const Packet & a)23 Packet pdigamma(const Packet& a) { using numext::digamma; return digamma(a); }
24
25 /** \internal \returns the zeta function of two arguments (coeff-wise) */
26 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
pzeta(const Packet & x,const Packet & q)27 Packet pzeta(const Packet& x, const Packet& q) { using numext::zeta; return zeta(x, q); }
28
29 /** \internal \returns the polygamma function (coeff-wise) */
30 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
ppolygamma(const Packet & n,const Packet & x)31 Packet ppolygamma(const Packet& n, const Packet& x) { using numext::polygamma; return polygamma(n, x); }
32
33 /** \internal \returns the erf(\a a) (coeff-wise) */
34 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
perf(const Packet & a)35 Packet perf(const Packet& a) { using numext::erf; return erf(a); }
36
37 /** \internal \returns the erfc(\a a) (coeff-wise) */
38 template<typename Packet> EIGEN_DECLARE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
perfc(const Packet & a)39 Packet perfc(const Packet& a) { using numext::erfc; return erfc(a); }
40
41 /** \internal \returns the incomplete gamma function igamma(\a a, \a x) */
42 template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
pigamma(const Packet & a,const Packet & x)43 Packet pigamma(const Packet& a, const Packet& x) { using numext::igamma; return igamma(a, x); }
44
45 /** \internal \returns the complementary incomplete gamma function igammac(\a a, \a x) */
46 template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
pigammac(const Packet & a,const Packet & x)47 Packet pigammac(const Packet& a, const Packet& x) { using numext::igammac; return igammac(a, x); }
48
49 /** \internal \returns the complementary incomplete gamma function betainc(\a a, \a b, \a x) */
50 template<typename Packet> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
pbetainc(const Packet & a,const Packet & b,const Packet & x)51 Packet pbetainc(const Packet& a, const Packet& b,const Packet& x) { using numext::betainc; return betainc(a, b, x); }
52
53 } // end namespace internal
54
55 } // end namespace Eigen
56
57 #endif // EIGEN_SPECIALFUNCTIONS_PACKETMATH_H
58
59