6d749c172a
The size_t type means a number of _bytes_, and it was misused as counting e.g. the number of rows/columns in a matrix. Moreover, it is unsigned, which can give strange bugs if a signed/unsigned mismatch occurs.
102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
/*
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* Tiny Vector Matrix Library
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* Dense Vector Matrix Libary of Tiny size using Expression Templates
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*
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* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
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*
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* This library 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 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser 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 along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: Gemm.h,v 1.11 2004/06/17 15:53:12 opetzold Exp $
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*/
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#ifndef TVMET_META_GEMM_H
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#define TVMET_META_GEMM_H
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#include <tvmet/xpr/Null.h>
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namespace tvmet {
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namespace meta {
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/**
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* \class gemm Gemm.h "tvmet/meta/Gemm.h"
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* \brief Meta class for matrix-matrix operations, like product
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* using formula
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* \f[
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* M_1\,M_2
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* \f]
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* \note The rows of matrix 2 have to be equal to cols of matrix 1.
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*/
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template<int Rows1, int Cols1,
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int Cols2,
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int K>
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class gemm
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{
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gemm();
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gemm(const gemm&);
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gemm& operator=(const gemm&);
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private:
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enum {
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doIt = (K != Cols1 - 1) /**< recursive counter */
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};
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public:
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template<class E1, class E2>
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static inline
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typename PromoteTraits<
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typename E1::value_type,
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typename E2::value_type
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>::value_type
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prod(const E1& lhs, const E2& rhs, int i, int j) {
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return lhs(i, K) * rhs(K, j)
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+ gemm<Rows1 * doIt, Cols1 * doIt,
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Cols2 * doIt,
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(K+1) * doIt>::prod(lhs, rhs, i, j);
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}
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};
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/**
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* \class gemm<0,0,0,0> Gemm.h "tvmet/meta/Gemm.h"
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* \brief gemm Specialized for recursion.
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*/
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template<>
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class gemm<0,0,0,0>
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{
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gemm();
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gemm(const gemm&);
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gemm& operator=(const gemm&);
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public:
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template<class E1, class E2>
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static inline
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XprNull prod(const E1&, const E2&, int, int) {
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return XprNull();
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}
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};
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} // namespace meta
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} // namespace tvmet
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#endif /* TVMET_META_GEMM_H */
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// Local Variables:
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// mode:C++
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// End:
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