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Diffstat (limited to 'extern/Eigen2/Eigen/src/Core/GenericPacketMath.h')
-rw-r--r-- | extern/Eigen2/Eigen/src/Core/GenericPacketMath.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/extern/Eigen2/Eigen/src/Core/GenericPacketMath.h b/extern/Eigen2/Eigen/src/Core/GenericPacketMath.h new file mode 100644 index 00000000000..b0eee29f70f --- /dev/null +++ b/extern/Eigen2/Eigen/src/Core/GenericPacketMath.h @@ -0,0 +1,150 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. Eigen itself is part of the KDE project. +// +// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> +// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> +// +// Eigen is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 3 of the License, or (at your option) any later version. +// +// Alternatively, you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#ifndef EIGEN_GENERIC_PACKET_MATH_H +#define EIGEN_GENERIC_PACKET_MATH_H + +/** \internal + * \file GenericPacketMath.h + * + * Default implementation for types not supported by the vectorization. + * In practice these functions are provided to make easier the writing + * of generic vectorized code. + */ + +/** \internal \returns a + b (coeff-wise) */ +template<typename Packet> inline Packet +ei_padd(const Packet& a, + const Packet& b) { return a+b; } + +/** \internal \returns a - b (coeff-wise) */ +template<typename Packet> inline Packet +ei_psub(const Packet& a, + const Packet& b) { return a-b; } + +/** \internal \returns a * b (coeff-wise) */ +template<typename Packet> inline Packet +ei_pmul(const Packet& a, + const Packet& b) { return a*b; } + +/** \internal \returns a / b (coeff-wise) */ +template<typename Packet> inline Packet +ei_pdiv(const Packet& a, + const Packet& b) { return a/b; } + +/** \internal \returns the min of \a a and \a b (coeff-wise) */ +template<typename Packet> inline Packet +ei_pmin(const Packet& a, + const Packet& b) { return std::min(a, b); } + +/** \internal \returns the max of \a a and \a b (coeff-wise) */ +template<typename Packet> inline Packet +ei_pmax(const Packet& a, + const Packet& b) { return std::max(a, b); } + +/** \internal \returns a packet version of \a *from, from must be 16 bytes aligned */ +template<typename Scalar> inline typename ei_packet_traits<Scalar>::type +ei_pload(const Scalar* from) { return *from; } + +/** \internal \returns a packet version of \a *from, (un-aligned load) */ +template<typename Scalar> inline typename ei_packet_traits<Scalar>::type +ei_ploadu(const Scalar* from) { return *from; } + +/** \internal \returns a packet with constant coefficients \a a, e.g.: (a,a,a,a) */ +template<typename Scalar> inline typename ei_packet_traits<Scalar>::type +ei_pset1(const Scalar& a) { return a; } + +/** \internal copy the packet \a from to \a *to, \a to must be 16 bytes aligned */ +template<typename Scalar, typename Packet> inline void ei_pstore(Scalar* to, const Packet& from) +{ (*to) = from; } + +/** \internal copy the packet \a from to \a *to, (un-aligned store) */ +template<typename Scalar, typename Packet> inline void ei_pstoreu(Scalar* to, const Packet& from) +{ (*to) = from; } + +/** \internal \returns the first element of a packet */ +template<typename Packet> inline typename ei_unpacket_traits<Packet>::type ei_pfirst(const Packet& a) +{ return a; } + +/** \internal \returns a packet where the element i contains the sum of the packet of \a vec[i] */ +template<typename Packet> inline Packet +ei_preduxp(const Packet* vecs) { return vecs[0]; } + +/** \internal \returns the sum of the elements of \a a*/ +template<typename Packet> inline typename ei_unpacket_traits<Packet>::type ei_predux(const Packet& a) +{ return a; } + + +/*************************************************************************** +* The following functions might not have to be overwritten for vectorized types +***************************************************************************/ + +/** \internal \returns a * b + c (coeff-wise) */ +template<typename Packet> inline Packet +ei_pmadd(const Packet& a, + const Packet& b, + const Packet& c) +{ return ei_padd(ei_pmul(a, b),c); } + +/** \internal \returns a packet version of \a *from. + * \If LoadMode equals Aligned, \a from must be 16 bytes aligned */ +template<typename Scalar, int LoadMode> +inline typename ei_packet_traits<Scalar>::type ei_ploadt(const Scalar* from) +{ + if(LoadMode == Aligned) + return ei_pload(from); + else + return ei_ploadu(from); +} + +/** \internal copy the packet \a from to \a *to. + * If StoreMode equals Aligned, \a to must be 16 bytes aligned */ +template<typename Scalar, typename Packet, int LoadMode> +inline void ei_pstoret(Scalar* to, const Packet& from) +{ + if(LoadMode == Aligned) + ei_pstore(to, from); + else + ei_pstoreu(to, from); +} + +/** \internal default implementation of ei_palign() allowing partial specialization */ +template<int Offset,typename PacketType> +struct ei_palign_impl +{ + // by default data are aligned, so there is nothing to be done :) + inline static void run(PacketType&, const PacketType&) {} +}; + +/** \internal update \a first using the concatenation of the \a Offset last elements + * of \a first and packet_size minus \a Offset first elements of \a second */ +template<int Offset,typename PacketType> +inline void ei_palign(PacketType& first, const PacketType& second) +{ + ei_palign_impl<Offset,PacketType>::run(first,second); +} + +#endif // EIGEN_GENERIC_PACKET_MATH_H + |