306 lines
10 KiB
C++
306 lines
10 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#ifndef EIGEN_ARRAY_FUNCTORS_H
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#define EIGEN_ARRAY_FUNCTORS_H
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/** \internal
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* \array_module
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*
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* \brief Template functor to add a scalar to a fixed other one
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*
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* \sa class CwiseUnaryOp, Array::operator+
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*/
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/* If you wonder why doing the ei_pset1() in packetOp() is an optimization check ei_scalar_multiple_op */
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template<typename Scalar>
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struct ei_scalar_add_op {
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typedef typename ei_packet_traits<Scalar>::type PacketScalar;
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// FIXME default copy constructors seems bugged with std::complex<>
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inline ei_scalar_add_op(const ei_scalar_add_op& other) : m_other(other.m_other) { }
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inline ei_scalar_add_op(const Scalar& other) : m_other(other) { }
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inline Scalar operator() (const Scalar& a) const { return a + m_other; }
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inline const PacketScalar packetOp(const PacketScalar& a) const
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{ return ei_padd(a, ei_pset1(m_other)); }
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const Scalar m_other;
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_add_op<Scalar> >
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{ enum { Cost = NumTraits<Scalar>::AddCost, PacketAccess = ei_packet_traits<Scalar>::size>1 }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the square root of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::sqrt()
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*/
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template<typename Scalar> struct ei_scalar_sqrt_op EIGEN_EMPTY_STRUCT {
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inline const Scalar operator() (const Scalar& a) const { return ei_sqrt(a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_sqrt_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the exponential of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::exp()
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*/
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template<typename Scalar> struct ei_scalar_exp_op EIGEN_EMPTY_STRUCT {
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inline const Scalar operator() (const Scalar& a) const { return ei_exp(a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_exp_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the logarithm of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::log()
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*/
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template<typename Scalar> struct ei_scalar_log_op EIGEN_EMPTY_STRUCT {
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inline const Scalar operator() (const Scalar& a) const { return ei_log(a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_log_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the cosine of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::cos()
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*/
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template<typename Scalar> struct ei_scalar_cos_op EIGEN_EMPTY_STRUCT {
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inline const Scalar operator() (const Scalar& a) const { return ei_cos(a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_cos_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the sine of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::sin()
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*/
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template<typename Scalar> struct ei_scalar_sin_op EIGEN_EMPTY_STRUCT {
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inline const Scalar operator() (const Scalar& a) const { return ei_sin(a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_sin_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to raise a scalar to a power
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*
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* \sa class CwiseUnaryOp, Cwise::pow
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*/
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template<typename Scalar>
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struct ei_scalar_pow_op {
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// FIXME default copy constructors seems bugged with std::complex<>
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inline ei_scalar_pow_op(const ei_scalar_pow_op& other) : m_exponent(other.m_exponent) { }
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inline ei_scalar_pow_op(const Scalar& exponent) : m_exponent(exponent) {}
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inline Scalar operator() (const Scalar& a) const { return ei_pow(a, m_exponent); }
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const Scalar m_exponent;
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_pow_op<Scalar> >
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{ enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the inverse of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::inverse()
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*/
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template<typename Scalar>
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struct ei_scalar_inverse_op {
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inline Scalar operator() (const Scalar& a) const { return Scalar(1)/a; }
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template<typename PacketScalar>
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inline const PacketScalar packetOp(const PacketScalar& a) const
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{ return ei_pdiv(ei_pset1(Scalar(1)),a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_inverse_op<Scalar> >
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{ enum { Cost = NumTraits<Scalar>::MulCost, PacketAccess = int(ei_packet_traits<Scalar>::size)>1 }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the square of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::square()
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*/
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template<typename Scalar>
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struct ei_scalar_square_op {
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inline Scalar operator() (const Scalar& a) const { return a*a; }
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template<typename PacketScalar>
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inline const PacketScalar packetOp(const PacketScalar& a) const
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{ return ei_pmul(a,a); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_square_op<Scalar> >
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{ enum { Cost = NumTraits<Scalar>::MulCost, PacketAccess = int(ei_packet_traits<Scalar>::size)>1 }; };
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/** \internal
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*
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* \array_module
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*
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* \brief Template functor to compute the cube of a scalar
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*
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* \sa class CwiseUnaryOp, Cwise::cube()
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*/
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template<typename Scalar>
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struct ei_scalar_cube_op {
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inline Scalar operator() (const Scalar& a) const { return a*a*a; }
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template<typename PacketScalar>
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inline const PacketScalar packetOp(const PacketScalar& a) const
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{ return ei_pmul(a,ei_pmul(a,a)); }
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};
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template<typename Scalar>
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struct ei_functor_traits<ei_scalar_cube_op<Scalar> >
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{ enum { Cost = 2*NumTraits<Scalar>::MulCost, PacketAccess = int(ei_packet_traits<Scalar>::size)>1 }; };
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// default ei_functor_traits for STL functors:
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template<typename T>
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struct ei_functor_traits<std::multiplies<T> >
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{ enum { Cost = NumTraits<T>::MulCost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::divides<T> >
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{ enum { Cost = NumTraits<T>::MulCost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::plus<T> >
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{ enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::minus<T> >
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{ enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::negate<T> >
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{ enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::logical_or<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::logical_and<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::logical_not<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::greater<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::less<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::greater_equal<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::less_equal<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::equal_to<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::not_equal_to<T> >
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{ enum { Cost = 1, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::binder2nd<T> >
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{ enum { Cost = ei_functor_traits<T>::Cost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::binder1st<T> >
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{ enum { Cost = ei_functor_traits<T>::Cost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::unary_negate<T> >
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{ enum { Cost = 1 + ei_functor_traits<T>::Cost, PacketAccess = false }; };
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template<typename T>
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struct ei_functor_traits<std::binary_negate<T> >
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{ enum { Cost = 1 + ei_functor_traits<T>::Cost, PacketAccess = false }; };
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#ifdef EIGEN_STDEXT_SUPPORT
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template<typename T0,typename T1>
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struct ei_functor_traits<std::project1st<T0,T1> >
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{ enum { Cost = 0, PacketAccess = false }; };
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template<typename T0,typename T1>
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struct ei_functor_traits<std::project2nd<T0,T1> >
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{ enum { Cost = 0, PacketAccess = false }; };
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template<typename T0,typename T1>
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struct ei_functor_traits<std::select2nd<std::pair<T0,T1> > >
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{ enum { Cost = 0, PacketAccess = false }; };
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template<typename T0,typename T1>
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struct ei_functor_traits<std::select1st<std::pair<T0,T1> > >
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{ enum { Cost = 0, PacketAccess = false }; };
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template<typename T0,typename T1>
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struct ei_functor_traits<std::unary_compose<T0,T1> >
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{ enum { Cost = ei_functor_traits<T0>::Cost + ei_functor_traits<T1>::Cost, PacketAccess = false }; };
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template<typename T0,typename T1,typename T2>
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struct ei_functor_traits<std::binary_compose<T0,T1,T2> >
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{ enum { Cost = ei_functor_traits<T0>::Cost + ei_functor_traits<T1>::Cost + ei_functor_traits<T2>::Cost, PacketAccess = false }; };
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#endif // EIGEN_STDEXT_SUPPORT
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#endif // EIGEN_ARRAY_FUNCTORS_H
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