Shuto Naruse / Mbed 2 deprecated Eurobot2012_Secondary

Eurobot2012_Secondary

Fork of Eurobot_2012_Secondary by Shuto Naruse

tvmet/xpr/MtVProduct.h@1:cc2a9eb0bd55, 2012-10-17 (annotated)

Committer:
narshu
Date:
Wed Oct 17 22:25:31 2012 +0000
Revision:
1:cc2a9eb0bd55
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narshu 1:cc2a9eb0bd55 1 /*
narshu 1:cc2a9eb0bd55 2 * Tiny Vector Matrix Library
narshu 1:cc2a9eb0bd55 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
narshu 1:cc2a9eb0bd55 4 *
narshu 1:cc2a9eb0bd55 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
narshu 1:cc2a9eb0bd55 6 *
narshu 1:cc2a9eb0bd55 7 * This library is free software; you can redistribute it and/or
narshu 1:cc2a9eb0bd55 8 * modify it under the terms of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 9 * License as published by the Free Software Foundation; either
narshu 1:cc2a9eb0bd55 10 * version 2.1 of the License, or (at your option) any later version.
narshu 1:cc2a9eb0bd55 11 *
narshu 1:cc2a9eb0bd55 12 * This library is distributed in the hope that it will be useful,
narshu 1:cc2a9eb0bd55 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
narshu 1:cc2a9eb0bd55 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
narshu 1:cc2a9eb0bd55 15 * Lesser General Public License for more details.
narshu 1:cc2a9eb0bd55 16 *
narshu 1:cc2a9eb0bd55 17 * You should have received a copy of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 18 * License along with this library; if not, write to the Free Software
narshu 1:cc2a9eb0bd55 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
narshu 1:cc2a9eb0bd55 20 *
narshu 1:cc2a9eb0bd55 21 * $Id: MtVProduct.h,v 1.14 2007-06-23 15:59:00 opetzold Exp $
narshu 1:cc2a9eb0bd55 22 */
narshu 1:cc2a9eb0bd55 23
narshu 1:cc2a9eb0bd55 24 #ifndef TVMET_XPR_MTVPRODUCT_H
narshu 1:cc2a9eb0bd55 25 #define TVMET_XPR_MTVPRODUCT_H
narshu 1:cc2a9eb0bd55 26
narshu 1:cc2a9eb0bd55 27 #include <tvmet/meta/Gemtv.h>
narshu 1:cc2a9eb0bd55 28 #include <tvmet/loop/Gemtv.h>
narshu 1:cc2a9eb0bd55 29
narshu 1:cc2a9eb0bd55 30 namespace tvmet {
narshu 1:cc2a9eb0bd55 31
narshu 1:cc2a9eb0bd55 32
narshu 1:cc2a9eb0bd55 33 /**
narshu 1:cc2a9eb0bd55 34 * \class XprMtVProduct MtVProduct.h "tvmet/xpr/MtVProduct.h"
narshu 1:cc2a9eb0bd55 35 * \brief Expression for matrix-transposed vector product
narshu 1:cc2a9eb0bd55 36 * using formula
narshu 1:cc2a9eb0bd55 37 * \f[
narshu 1:cc2a9eb0bd55 38 * M^T\,v
narshu 1:cc2a9eb0bd55 39 * \f]
narshu 1:cc2a9eb0bd55 40 */
narshu 1:cc2a9eb0bd55 41 template<class E1, std::size_t Rows, std::size_t Cols,
narshu 1:cc2a9eb0bd55 42 class E2>
narshu 1:cc2a9eb0bd55 43 class XprMtVProduct
narshu 1:cc2a9eb0bd55 44 : public TvmetBase< XprMtVProduct<E1, Rows, Cols, E2> >
narshu 1:cc2a9eb0bd55 45 {
narshu 1:cc2a9eb0bd55 46 XprMtVProduct();
narshu 1:cc2a9eb0bd55 47 XprMtVProduct& operator=(const XprMtVProduct&);
narshu 1:cc2a9eb0bd55 48
narshu 1:cc2a9eb0bd55 49 public:
narshu 1:cc2a9eb0bd55 50 typedef typename PromoteTraits<
narshu 1:cc2a9eb0bd55 51 typename E1::value_type,
narshu 1:cc2a9eb0bd55 52 typename E2::value_type
narshu 1:cc2a9eb0bd55 53 >::value_type value_type;
narshu 1:cc2a9eb0bd55 54
narshu 1:cc2a9eb0bd55 55 public:
narshu 1:cc2a9eb0bd55 56 /** Complexity counter. */
narshu 1:cc2a9eb0bd55 57 enum {
narshu 1:cc2a9eb0bd55 58 ops_lhs = E1::ops,
narshu 1:cc2a9eb0bd55 59 ops_rhs = E2::ops,
narshu 1:cc2a9eb0bd55 60 M = Cols * Rows,
narshu 1:cc2a9eb0bd55 61 N = Cols * (Rows - 1),
narshu 1:cc2a9eb0bd55 62 ops_plus = M * NumericTraits<value_type>::ops_plus,
narshu 1:cc2a9eb0bd55 63 ops_muls = N * NumericTraits<value_type>::ops_muls,
narshu 1:cc2a9eb0bd55 64 ops = ops_plus + ops_muls,
narshu 1:cc2a9eb0bd55 65 use_meta = Rows*Cols < TVMET_COMPLEXITY_MV_TRIGGER ? true : false
narshu 1:cc2a9eb0bd55 66 };
narshu 1:cc2a9eb0bd55 67
narshu 1:cc2a9eb0bd55 68 public:
narshu 1:cc2a9eb0bd55 69 /** Constructor. */
narshu 1:cc2a9eb0bd55 70 explicit XprMtVProduct(const E1& lhs, const E2& rhs)
narshu 1:cc2a9eb0bd55 71 : m_lhs(lhs), m_rhs(rhs)
narshu 1:cc2a9eb0bd55 72 { }
narshu 1:cc2a9eb0bd55 73
narshu 1:cc2a9eb0bd55 74 /** Copy Constructor. Not explicit! */
narshu 1:cc2a9eb0bd55 75 #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
narshu 1:cc2a9eb0bd55 76 XprMtVProduct(const XprMtVProduct& e)
narshu 1:cc2a9eb0bd55 77 : m_lhs(e.m_lhs), m_rhs(e.m_rhs)
narshu 1:cc2a9eb0bd55 78 { }
narshu 1:cc2a9eb0bd55 79 #endif
narshu 1:cc2a9eb0bd55 80
narshu 1:cc2a9eb0bd55 81 private:
narshu 1:cc2a9eb0bd55 82 /** Wrapper for meta gemm. */
narshu 1:cc2a9eb0bd55 83 static inline
narshu 1:cc2a9eb0bd55 84 value_type do_gemtv(dispatch<true>, const E1& lhs, const E2& rhs, std::size_t i) {
narshu 1:cc2a9eb0bd55 85 return meta::gemtv<Rows, Cols, 0>::prod(lhs, rhs, i);
narshu 1:cc2a9eb0bd55 86 }
narshu 1:cc2a9eb0bd55 87
narshu 1:cc2a9eb0bd55 88 /** Wrapper for loop gemm. */
narshu 1:cc2a9eb0bd55 89 static inline
narshu 1:cc2a9eb0bd55 90 value_type do_gemtv(dispatch<false>, const E1& lhs, const E2& rhs, std::size_t i) {
narshu 1:cc2a9eb0bd55 91 return loop::gemtv<Rows, Cols>::prod(lhs, rhs, i);
narshu 1:cc2a9eb0bd55 92 }
narshu 1:cc2a9eb0bd55 93
narshu 1:cc2a9eb0bd55 94 public:
narshu 1:cc2a9eb0bd55 95 /** index operator, returns the expression by index. This is the vector
narshu 1:cc2a9eb0bd55 96 style since a matrix*vector gives a vector. */
narshu 1:cc2a9eb0bd55 97 value_type operator()(std::size_t j) const {
narshu 1:cc2a9eb0bd55 98 TVMET_RT_CONDITION(j < Cols , "XprMtVProduct Bounce Violation")
narshu 1:cc2a9eb0bd55 99 return do_gemtv(dispatch<use_meta>(), m_lhs, m_rhs, j);
narshu 1:cc2a9eb0bd55 100 }
narshu 1:cc2a9eb0bd55 101
narshu 1:cc2a9eb0bd55 102 public: // debugging Xpr parse tree
narshu 1:cc2a9eb0bd55 103 void print_xpr(std::ostream& os, std::size_t l=0) const {
narshu 1:cc2a9eb0bd55 104 os << IndentLevel(l++)
narshu 1:cc2a9eb0bd55 105 << "XprMtVProduct[O=" << ops << ", (O1=" << ops_lhs << ", O2=" << ops_rhs << ")]<"
narshu 1:cc2a9eb0bd55 106 << std::endl;
narshu 1:cc2a9eb0bd55 107 m_lhs.print_xpr(os, l);
narshu 1:cc2a9eb0bd55 108 os << IndentLevel(l)
narshu 1:cc2a9eb0bd55 109 << "R=" << Rows << ", C=" << Cols << ",\n";
narshu 1:cc2a9eb0bd55 110 m_rhs.print_xpr(os, l);
narshu 1:cc2a9eb0bd55 111 os << IndentLevel(--l)
narshu 1:cc2a9eb0bd55 112 << ">," << std::endl;
narshu 1:cc2a9eb0bd55 113 }
narshu 1:cc2a9eb0bd55 114
narshu 1:cc2a9eb0bd55 115 private:
narshu 1:cc2a9eb0bd55 116 const E1 m_lhs;
narshu 1:cc2a9eb0bd55 117 const E2 m_rhs;
narshu 1:cc2a9eb0bd55 118 };
narshu 1:cc2a9eb0bd55 119
narshu 1:cc2a9eb0bd55 120
narshu 1:cc2a9eb0bd55 121 } // namespace tvmet
narshu 1:cc2a9eb0bd55 122
narshu 1:cc2a9eb0bd55 123 #endif // TVMET_XPR_MTVPRODUCT_H
narshu 1:cc2a9eb0bd55 124
narshu 1:cc2a9eb0bd55 125 // Local Variables:
narshu 1:cc2a9eb0bd55 126 // mode:C++
narshu 1:cc2a9eb0bd55 127 // tab-width:8
narshu 1:cc2a9eb0bd55 128 // End: