[80] | 1 | // -*- C++ -*- |
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| 2 | /*************************************************************************** |
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| 3 | * blitz/meta/matmat.h TinyMatrix matrix-matrix product metaprogram |
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| 4 | * |
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| 5 | * $Id: matmat.h,v 1.5 2005/05/07 04:17:57 julianc Exp $ |
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| 6 | * |
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| 7 | * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> |
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| 8 | * |
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| 9 | * This program is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the GNU General Public License |
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| 11 | * as published by the Free Software Foundation; either version 2 |
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| 12 | * of the License, or (at your option) any later version. |
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| 13 | * |
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| 14 | * This program is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * Suggestions: blitz-dev@oonumerics.org |
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| 20 | * Bugs: blitz-bugs@oonumerics.org |
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| 21 | * |
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| 22 | * For more information, please see the Blitz++ Home Page: |
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| 23 | * http://oonumerics.org/blitz/ |
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| 24 | * |
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| 25 | ***************************************************************************/ |
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| 26 | |
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| 27 | #ifndef BZ_META_MATMAT_H |
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| 28 | #define BZ_META_MATMAT_H |
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| 29 | |
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| 30 | #ifndef BZ_TINYMAT_H |
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| 31 | #error <blitz/meta/matmat.h> must be included via <blitz/tinymat.h> |
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| 32 | #endif |
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| 33 | |
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| 34 | #include <blitz/meta/metaprog.h> |
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| 35 | #include <blitz/tinymatexpr.h> |
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| 36 | |
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| 37 | BZ_NAMESPACE(blitz) |
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| 38 | |
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| 39 | // Template metaprogram for matrix-matrix multiplication |
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| 40 | template<int N_rows1, int N_columns, int N_columns2, int N_rowStride1, |
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| 41 | int N_colStride1, int N_rowStride2, int N_colStride2, int K> |
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| 42 | class _bz_meta_matrixMatrixProduct { |
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| 43 | public: |
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| 44 | static const int go = (K != N_columns - 1) ? 1 : 0; |
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| 45 | |
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| 46 | template<typename T_numtype1, typename T_numtype2> |
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| 47 | static inline BZ_PROMOTE(T_numtype1, T_numtype2) |
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| 48 | f(const T_numtype1* matrix1, const T_numtype2* matrix2, int i, int j) |
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| 49 | { |
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| 50 | return matrix1[i * N_rowStride1 + K * N_colStride1] |
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| 51 | * matrix2[K * N_rowStride2 + j * N_colStride2] |
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| 52 | + _bz_meta_matrixMatrixProduct<N_rows1 * go, N_columns * go, |
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| 53 | N_columns2 * go, N_rowStride1 * go, N_colStride1 * go, |
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| 54 | N_rowStride2 * go, N_colStride2 * go, (K+1) * go> |
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| 55 | ::f(matrix1, matrix2, i, j); |
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| 56 | } |
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| 57 | }; |
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| 58 | |
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| 59 | template<> |
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| 60 | class _bz_meta_matrixMatrixProduct<0,0,0,0,0,0,0,0> { |
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| 61 | public: |
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| 62 | static inline _bz_meta_nullOperand f(const void*, const void*, int, int) |
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| 63 | { return _bz_meta_nullOperand(); } |
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| 64 | }; |
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| 65 | |
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| 66 | |
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| 67 | |
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| 68 | |
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| 69 | template<typename T_numtype1, typename T_numtype2, int N_rows1, int N_columns, |
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| 70 | int N_columns2, int N_rowStride1, int N_colStride1, |
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| 71 | int N_rowStride2, int N_colStride2> |
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| 72 | class _bz_tinyMatrixMatrixProduct { |
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| 73 | public: |
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| 74 | typedef BZ_PROMOTE(T_numtype1, T_numtype2) T_numtype; |
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| 75 | |
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| 76 | static const int rows = N_rows1, columns = N_columns2; |
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| 77 | |
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| 78 | _bz_tinyMatrixMatrixProduct(const T_numtype1* matrix1, |
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| 79 | const T_numtype2* matrix2) |
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| 80 | : matrix1_(matrix1), matrix2_(matrix2) |
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| 81 | { } |
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| 82 | |
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| 83 | _bz_tinyMatrixMatrixProduct(const _bz_tinyMatrixMatrixProduct<T_numtype1, |
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| 84 | T_numtype2, N_rows1, N_columns, N_columns2, N_rowStride1, N_colStride1, |
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| 85 | N_rowStride2, N_colStride2>& x) |
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| 86 | : matrix1_(x.matrix1_), matrix2_(x.matrix2_) |
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| 87 | { } |
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| 88 | |
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| 89 | const T_numtype1* matrix1() const |
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| 90 | { return matrix1_; } |
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| 91 | |
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| 92 | const T_numtype2* matrix2() const |
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| 93 | { return matrix2_; } |
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| 94 | |
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| 95 | T_numtype operator()(int i, int j) const |
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| 96 | { |
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| 97 | return _bz_meta_matrixMatrixProduct<N_rows1, N_columns, |
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| 98 | N_columns2, N_rowStride1, N_colStride1, N_rowStride2, |
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| 99 | N_colStride2, 0>::f(matrix1_, matrix2_, i, j); |
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| 100 | } |
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| 101 | |
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| 102 | protected: |
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| 103 | const T_numtype1* matrix1_; |
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| 104 | const T_numtype2* matrix2_; |
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| 105 | }; |
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| 106 | |
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| 107 | template<typename T_numtype1, typename T_numtype2, int N_rows1, int N_columns1, |
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| 108 | int N_columns2> |
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| 109 | inline |
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| 110 | _bz_tinyMatExpr<_bz_tinyMatrixMatrixProduct<T_numtype1, T_numtype2, N_rows1, |
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| 111 | N_columns1, N_columns2, N_columns1, 1, N_columns2, 1> > |
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| 112 | product(const TinyMatrix<T_numtype1, N_rows1, N_columns1>& a, |
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| 113 | const TinyMatrix<T_numtype2, N_columns1, N_columns2>& b) |
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| 114 | { |
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| 115 | typedef _bz_tinyMatrixMatrixProduct<T_numtype1, T_numtype2, |
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| 116 | N_rows1, N_columns1, N_columns2, N_columns1, 1, N_columns2, 1> T_expr; |
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| 117 | return _bz_tinyMatExpr<T_expr>(T_expr(a.data(), b.data())); |
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| 118 | } |
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| 119 | |
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| 120 | BZ_NAMESPACE_END |
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| 121 | |
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| 122 | #endif // BZ_META_MATMAT_H |
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| 123 | |
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