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fc924bc7d4
the compiler output with an infinite recursion. Also add a #define switch for loop unrolling.
86 lines
3.0 KiB
C++
86 lines
3.0 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) 2007 Michael Olbrich <michael.olbrich@gmx.net>
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// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
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//
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// Eigen is free software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation; either version 2 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 General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along
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// with Eigen; if not, write to the Free Software Foundation, Inc., 51
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// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. This exception does not invalidate any other reasons why a work
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// based on this file might be covered by the GNU General Public License.
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#ifndef EIGEN_COPYHELPER_H
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#define EIGEN_COPYHELPER_H
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template<int UnrollCount, int Rows> struct CopyHelperUnroller
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{
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static const int col = (UnrollCount-1) / Rows;
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static const int row = (UnrollCount-1) % Rows;
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template <typename Derived1, typename Derived2>
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static void run(Derived1 &dst, const Derived2 &src)
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{
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CopyHelperUnroller<UnrollCount-1, Rows>::run(dst, src);
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dst.write(row, col) = src.read(row, col);
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}
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};
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// prevent buggy user code from causing an infinite recursion
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template<int UnrollCount> struct CopyHelperUnroller<UnrollCount, 0>
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{
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template <typename Derived1, typename Derived2>
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static void run(Derived1 &dst, const Derived2 &src)
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{
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EIGEN_UNUSED(dst);
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EIGEN_UNUSED(src);
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}
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};
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template<int Rows> struct CopyHelperUnroller<1, Rows>
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{
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template <typename Derived1, typename Derived2>
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static void run(Derived1 &dst, const Derived2 &src)
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{
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dst.write(0, 0) = src.read(0, 0);
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}
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};
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template<int Rows> struct CopyHelperUnroller<Dynamic, Rows>
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{
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template <typename Derived1, typename Derived2>
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static void run(Derived1 &dst, const Derived2 &src)
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{
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EIGEN_UNUSED(dst);
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EIGEN_UNUSED(src);
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}
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};
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template<typename Scalar, typename Derived>
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template<typename OtherDerived>
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void MatrixBase<Scalar, Derived>::_copy_helper(const MatrixBase<Scalar, OtherDerived>& other)
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{
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if(EIGEN_UNROLLED_LOOPS && SizeAtCompileTime != Dynamic && SizeAtCompileTime <= 25)
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CopyHelperUnroller<SizeAtCompileTime, RowsAtCompileTime>::run(*this, other);
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else
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for(int i = 0; i < rows(); i++)
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for(int j = 0; j < cols(); j++)
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write(i, j) = other.read(i, j);
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}
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#endif // EIGEN_COPYHELPER_H
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