add logAbsDeterminant()

move log and exp functors from Array to Core
update documentation

2 files changed, 59 insertions, 0 deletions

diff --git a/Eigen/src/Core/CwiseUnaryOp.h b/Eigen/src/Core/CwiseUnaryOp.h
index 3ffb24833..d701c25d9 100644
--- a/Eigen/src/Core/CwiseUnaryOp.h
+++ b/Eigen/src/Core/CwiseUnaryOp.h
@@ -205,6 +205,35 @@ MatrixBase<Derived>::cast() const
   return derived();
 }
 
+/** \returns an expression of the coefficient-wise exponential of *this.
+  *
+  * Example: \include Cwise_exp.cpp
+  * Output: \verbinclude Cwise_exp.out
+  *
+  * \sa pow(), log(), sin(), cos()
+  */
+template<typename ExpressionType>
+inline const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_exp_op)
+Cwise<ExpressionType>::exp() const
+{
+  return _expression();
+}
+
+/** \returns an expression of the coefficient-wise logarithm of *this.
+  *
+  * Example: \include Cwise_log.cpp
+  * Output: \verbinclude Cwise_log.out
+  *
+  * \sa exp()
+  */
+template<typename ExpressionType>
+inline const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_log_op)
+Cwise<ExpressionType>::log() const
+{
+  return _expression();
+}
+
+
 /** \relates MatrixBase */
 template<typename Derived>
 EIGEN_STRONG_INLINE const typename MatrixBase<Derived>::ScalarMultipleReturnType
diff --git a/Eigen/src/Core/Functors.h b/Eigen/src/Core/Functors.h
index a4c9604df..0c68d7434 100644
--- a/Eigen/src/Core/Functors.h
+++ b/Eigen/src/Core/Functors.h
@@ -299,6 +299,36 @@ struct ei_functor_traits<ei_scalar_imag_op<Scalar> >
 { enum { Cost = 0, PacketAccess = false }; };
 
 /** \internal
+  *
+  * \brief Template functor to compute the exponential of a scalar
+  *
+  * \sa class CwiseUnaryOp, Cwise::exp()
+  */
+template<typename Scalar> struct ei_scalar_exp_op EIGEN_EMPTY_STRUCT {
+  inline const Scalar operator() (const Scalar& a) const { return ei_exp(a); }
+  typedef typename ei_packet_traits<Scalar>::type Packet;
+  inline Packet packetOp(const Packet& a) const { return ei_pexp(a); }
+};
+template<typename Scalar>
+struct ei_functor_traits<ei_scalar_exp_op<Scalar> >
+{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = ei_packet_traits<Scalar>::HasExp }; };
+
+/** \internal
+  *
+  * \brief Template functor to compute the logarithm of a scalar
+  *
+  * \sa class CwiseUnaryOp, Cwise::log()
+  */
+template<typename Scalar> struct ei_scalar_log_op EIGEN_EMPTY_STRUCT {
+  inline const Scalar operator() (const Scalar& a) const { return ei_log(a); }
+  typedef typename ei_packet_traits<Scalar>::type Packet;
+  inline Packet packetOp(const Packet& a) const { return ei_plog(a); }
+};
+template<typename Scalar>
+struct ei_functor_traits<ei_scalar_log_op<Scalar> >
+{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = ei_packet_traits<Scalar>::HasLog }; };
+
+/** \internal
   * \brief Template functor to multiply a scalar by a fixed other one
   *
   * \sa class CwiseUnaryOp, MatrixBase::operator*, MatrixBase::operator/