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Add digamma for CPU + CUDA. Includes tests.

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This commit is contained in:
Eugene Brevdo
2015-12-24 21:15:38 -08:00
parent bdcbc66a5c
commit f7362772e3
9 changed files with 447 additions and 62 deletions
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5
Eigen/src/Core/GenericPacketMath.h
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@@ -75,6 +75,7 @@ struct default_packet_traits
HasCosh = 0,
HasTanh = 0,
HasLGamma = 0,
HasDiGamma = 0,
HasErf = 0,
HasErfc = 0,
@@ -439,6 +440,10 @@ Packet pceil(const Packet& a) { using numext::ceil; return ceil(a); }
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 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); }