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Eurobot2012_Primary

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tvmet/xpr/MVProduct.h@26:0995f61cb7b8, 2012-10-17 (annotated)

Committer:
narshu
Date:
Wed Oct 17 22:22:47 2012 +0000
Revision:
26:0995f61cb7b8
Parent:
25:143b19c1fb05 
Eurobot 2012 Primary;

Who changed what in which revision?

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narshu 25:143b19c1fb05 1 /*
narshu 25:143b19c1fb05 2 * Tiny Vector Matrix Library
narshu 25:143b19c1fb05 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
narshu 25:143b19c1fb05 4 *
narshu 25:143b19c1fb05 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
narshu 25:143b19c1fb05 6 *
narshu 25:143b19c1fb05 7 * This library is free software; you can redistribute it and/or
narshu 25:143b19c1fb05 8 * modify it under the terms of the GNU Lesser General Public
narshu 25:143b19c1fb05 9 * License as published by the Free Software Foundation; either
narshu 25:143b19c1fb05 10 * version 2.1 of the License, or (at your option) any later version.
narshu 25:143b19c1fb05 11 *
narshu 25:143b19c1fb05 12 * This library is distributed in the hope that it will be useful,
narshu 25:143b19c1fb05 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
narshu 25:143b19c1fb05 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
narshu 25:143b19c1fb05 15 * Lesser General Public License for more details.
narshu 25:143b19c1fb05 16 *
narshu 25:143b19c1fb05 17 * You should have received a copy of the GNU Lesser General Public
narshu 25:143b19c1fb05 18 * License along with this library; if not, write to the Free Software
narshu 25:143b19c1fb05 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
narshu 25:143b19c1fb05 20 *
narshu 25:143b19c1fb05 21 * $Id: MVProduct.h,v 1.21 2007-06-23 15:59:00 opetzold Exp $
narshu 25:143b19c1fb05 22 */
narshu 25:143b19c1fb05 23
narshu 25:143b19c1fb05 24 #ifndef TVMET_XPR_MVPRODUCT_H
narshu 25:143b19c1fb05 25 #define TVMET_XPR_MVPRODUCT_H
narshu 25:143b19c1fb05 26
narshu 25:143b19c1fb05 27 #include <tvmet/meta/Gemv.h>
narshu 25:143b19c1fb05 28 #include <tvmet/loop/Gemv.h>
narshu 25:143b19c1fb05 29
narshu 25:143b19c1fb05 30 namespace tvmet {
narshu 25:143b19c1fb05 31
narshu 25:143b19c1fb05 32
narshu 25:143b19c1fb05 33 /**
narshu 25:143b19c1fb05 34 * \class XprMVProduct MVProduct.h "tvmet/xpr/MVProduct.h"
narshu 25:143b19c1fb05 35 * \brief Expression for matrix-vector product
narshu 25:143b19c1fb05 36 * using formula
narshu 25:143b19c1fb05 37 * \f[
narshu 25:143b19c1fb05 38 * M\,v
narshu 25:143b19c1fb05 39 * \f]
narshu 25:143b19c1fb05 40 */
narshu 25:143b19c1fb05 41 template<class E1, std::size_t Rows, std::size_t Cols,
narshu 25:143b19c1fb05 42 class E2>
narshu 25:143b19c1fb05 43 class XprMVProduct
narshu 25:143b19c1fb05 44 : public TvmetBase< XprMVProduct<E1, Rows, Cols, E2> >
narshu 25:143b19c1fb05 45 {
narshu 25:143b19c1fb05 46 XprMVProduct();
narshu 25:143b19c1fb05 47 XprMVProduct& operator=(const XprMVProduct&);
narshu 25:143b19c1fb05 48
narshu 25:143b19c1fb05 49 public:
narshu 25:143b19c1fb05 50 typedef typename PromoteTraits<
narshu 25:143b19c1fb05 51 typename E1::value_type,
narshu 25:143b19c1fb05 52 typename E2::value_type
narshu 25:143b19c1fb05 53 >::value_type value_type;
narshu 25:143b19c1fb05 54
narshu 25:143b19c1fb05 55 public:
narshu 25:143b19c1fb05 56 /** Complexity counter. */
narshu 25:143b19c1fb05 57 enum {
narshu 25:143b19c1fb05 58 ops_lhs = E1::ops,
narshu 25:143b19c1fb05 59 ops_rhs = E2::ops,
narshu 25:143b19c1fb05 60 M = Rows * Cols,
narshu 25:143b19c1fb05 61 N = Rows * (Cols - 1),
narshu 25:143b19c1fb05 62 ops_plus = M * NumericTraits<value_type>::ops_plus,
narshu 25:143b19c1fb05 63 ops_muls = N * NumericTraits<value_type>::ops_muls,
narshu 25:143b19c1fb05 64 ops = ops_plus + ops_muls,
narshu 25:143b19c1fb05 65 use_meta = Rows*Cols < TVMET_COMPLEXITY_MV_TRIGGER ? true : false
narshu 25:143b19c1fb05 66 };
narshu 25:143b19c1fb05 67
narshu 25:143b19c1fb05 68 public:
narshu 25:143b19c1fb05 69 /** Constructor. */
narshu 25:143b19c1fb05 70 explicit XprMVProduct(const E1& lhs, const E2& rhs)
narshu 25:143b19c1fb05 71 : m_lhs(lhs), m_rhs(rhs)
narshu 25:143b19c1fb05 72 { }
narshu 25:143b19c1fb05 73
narshu 25:143b19c1fb05 74 /** Copy Constructor. Not explicit! */
narshu 25:143b19c1fb05 75 #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
narshu 25:143b19c1fb05 76 XprMVProduct(const XprMVProduct& e)
narshu 25:143b19c1fb05 77 : m_lhs(e.m_lhs), m_rhs(e.m_rhs)
narshu 25:143b19c1fb05 78 { }
narshu 25:143b19c1fb05 79 #endif
narshu 25:143b19c1fb05 80
narshu 25:143b19c1fb05 81 private:
narshu 25:143b19c1fb05 82 /** Wrapper for meta gemm. */
narshu 25:143b19c1fb05 83 static inline
narshu 25:143b19c1fb05 84 value_type do_gemv(dispatch<true>, const E1& lhs, const E2& rhs, std::size_t j) {
narshu 25:143b19c1fb05 85 return meta::gemv<Rows, Cols,
narshu 25:143b19c1fb05 86 0>::prod(lhs, rhs, j);
narshu 25:143b19c1fb05 87 }
narshu 25:143b19c1fb05 88
narshu 25:143b19c1fb05 89 /** Wrapper for loop gemm. */
narshu 25:143b19c1fb05 90 static inline
narshu 25:143b19c1fb05 91 value_type do_gemv(dispatch<false>, const E1& lhs, const E2& rhs, std::size_t j) {
narshu 25:143b19c1fb05 92 return loop::gemv<Rows, Cols>::prod(lhs, rhs, j);
narshu 25:143b19c1fb05 93 }
narshu 25:143b19c1fb05 94
narshu 25:143b19c1fb05 95 public:
narshu 25:143b19c1fb05 96 /** index operator, returns the expression by index. This is the vector
narshu 25:143b19c1fb05 97 style since a matrix*vector gives a vector. */
narshu 25:143b19c1fb05 98 value_type operator()(std::size_t j) const {
narshu 25:143b19c1fb05 99 TVMET_RT_CONDITION(j < Rows , "XprMVProduct Bounce Violation")
narshu 25:143b19c1fb05 100 return do_gemv(dispatch<use_meta>(), m_lhs, m_rhs, j);
narshu 25:143b19c1fb05 101 }
narshu 25:143b19c1fb05 102
narshu 25:143b19c1fb05 103 public: // debugging Xpr parse tree
narshu 25:143b19c1fb05 104 void print_xpr(std::ostream& os, std::size_t l=0) const {
narshu 25:143b19c1fb05 105 os << IndentLevel(l++)
narshu 25:143b19c1fb05 106 << "XprMVProduct["
narshu 25:143b19c1fb05 107 << (use_meta ? "M" : "L") << ", O=" << ops
narshu 25:143b19c1fb05 108 << ", (O1=" << ops_lhs << ", O2=" << ops_rhs << ")]<"
narshu 25:143b19c1fb05 109 << std::endl;
narshu 25:143b19c1fb05 110 m_lhs.print_xpr(os, l);
narshu 25:143b19c1fb05 111 os << IndentLevel(l)
narshu 25:143b19c1fb05 112 << "R=" << Rows << ", C=" << Cols << ",\n";
narshu 25:143b19c1fb05 113 m_rhs.print_xpr(os, l);
narshu 25:143b19c1fb05 114 os << IndentLevel(--l)
narshu 25:143b19c1fb05 115 << ">," << std::endl;
narshu 25:143b19c1fb05 116 }
narshu 25:143b19c1fb05 117
narshu 25:143b19c1fb05 118 private:
narshu 25:143b19c1fb05 119 const E1 m_lhs;
narshu 25:143b19c1fb05 120 const E2 m_rhs;
narshu 25:143b19c1fb05 121 };
narshu 25:143b19c1fb05 122
narshu 25:143b19c1fb05 123
narshu 25:143b19c1fb05 124 } // namespace tvmet
narshu 25:143b19c1fb05 125
narshu 25:143b19c1fb05 126 #endif // TVMET_XPR_MVPRODUCT_H
narshu 25:143b19c1fb05 127
narshu 25:143b19c1fb05 128 // Local Variables:
narshu 25:143b19c1fb05 129 // mode:C++
narshu 25:143b19c1fb05 130 // tab-width:8
narshu 25:143b19c1fb05 131 // End: