devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

Add log2() to Eigen.

Browse Source
This commit is contained in:
Rasmus Munk Larsen
2020-12-04 21:45:09 +00:00
parent 2dbac2f99f
commit f9fac1d5b0
13 changed files with 160 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
Eigen/src/Core/functors/UnaryFunctors.h
View File

@@ -395,6 +395,22 @@ template<typename Scalar>
struct functor_traits<scalar_log10_op<Scalar> >
{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasLog10 }; };
/** \internal
*
* \brief Template functor to compute the base-2 logarithm of a scalar
*
* \sa class CwiseUnaryOp, Cwise::log2()
*/
template<typename Scalar> struct scalar_log2_op {
EIGEN_EMPTY_STRUCT_CTOR(scalar_log2_op)
EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return Scalar(M_LOG2E) * std::log(a); }
template <typename Packet>
EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog2(a); }
};
template<typename Scalar>
struct functor_traits<scalar_log2_op<Scalar> >
{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasLog }; };
/** \internal
* \brief Template functor to compute the square root of a scalar
* \sa class CwiseUnaryOp, Cwise::sqrt()