| 1 | /*************************************************************************** | 
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| 2 | * blitz/array/map.h      Declaration of the ArrayIndexMapping class | 
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| 3 | * | 
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| 4 | * $Id: map.h,v 1.1.1.1 1999-11-26 16:37:07 ansari Exp $ | 
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| 5 | * | 
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| 6 | * Copyright (C) 1997,1998 Todd Veldhuizen <tveldhui@seurat.uwaterloo.ca> | 
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| 7 | * | 
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| 8 | * This program is free software; you can redistribute it and/or | 
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| 9 | * modify it under the terms of the GNU General Public License | 
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| 10 | * as published by the Free Software Foundation; either version 2 | 
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| 11 | * of the License, or (at your option) any later version. | 
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| 12 | * | 
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| 13 | * This program is distributed in the hope that it will be useful, | 
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
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| 16 | * GNU General Public License for more details. | 
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| 17 | * | 
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| 18 | * Suggestions:          blitz-suggest@cybervision.com | 
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| 19 | * Bugs:                 blitz-bugs@cybervision.com | 
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| 20 | * | 
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| 21 | * For more information, please see the Blitz++ Home Page: | 
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| 22 | *    http://seurat.uwaterloo.ca/blitz/ | 
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| 23 | * | 
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| 24 | *************************************************************************** | 
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| 25 | * $Log: not supported by cvs2svn $ | 
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| 26 | * Revision 1.1.1.1  1999/04/09  17:59:03  ansari | 
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| 27 | * Creation module DPC/Blitz (blitz 0.4) Reza 09/04/99 | 
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| 28 | * | 
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| 29 | * Revision 1.2  1998/03/14 00:04:47  tveldhui | 
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| 30 | * 0.2-alpha-05 | 
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| 31 | * | 
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| 32 | * Revision 1.1  1997/07/16 14:51:20  tveldhui | 
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| 33 | * Update: Alpha release 0.2 (Arrays) | 
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| 34 | * | 
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| 35 | */ | 
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| 36 |  | 
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| 37 | /* | 
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| 38 | * ArrayIndexMapping is used to implement tensor array notation.  For | 
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| 39 | * example: | 
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| 40 | * | 
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| 41 | * Array<float, 2> A, B; | 
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| 42 | * firstIndex i; | 
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| 43 | * secondIndex j; | 
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| 44 | * thirdIndex k; | 
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| 45 | * Array<float, 3> C = A(i,j) * B(j,k); | 
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| 46 | * | 
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| 47 | * For expression templates purposes, something like B(j,k) is represented | 
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| 48 | * by an instance of class ArrayIndexMapping.  This class maps an array onto | 
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| 49 | * the destination array coordinate system, e.g. B(j,k) -> C(i,j,k) | 
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| 50 | */ | 
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| 51 |  | 
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| 52 | #ifndef BZ_ARRAYMAP_H | 
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| 53 | #define BZ_ARRAYMAP_H | 
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| 54 |  | 
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| 55 | #ifndef BZ_ARRAY_H | 
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| 56 | #error <blitz/array/map.h> must be included via <blitz/array.h> | 
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| 57 | #endif | 
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| 58 |  | 
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| 59 | BZ_NAMESPACE(blitz) | 
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| 60 |  | 
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| 61 | /* | 
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| 62 | * _bz_doArrayIndexMapping is a helper class.  It is specialized for | 
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| 63 | * ranks 1, 2, 3, ..., 11. | 
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| 64 | */ | 
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| 65 |  | 
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| 66 | template<int N_rank> | 
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| 67 | struct _bz_doArrayIndexMapping { | 
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| 68 | template<class T_numtype, int N_destRank> | 
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| 69 | static T_numtype map(const Array<T_numtype, N_rank>&, | 
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| 70 | const TinyVector<int,N_destRank>&, int, int, int, int, int, int, | 
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| 71 | int, int, int, int, int) | 
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| 72 | { | 
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| 73 | // If you try to use an array index mapping on an array with | 
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| 74 | // rank greater than 11, then you'll get a precondition failure | 
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| 75 | // here. | 
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| 76 | BZPRECONDITION(0); | 
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| 77 | } | 
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| 78 | }; | 
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| 79 |  | 
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| 80 | template<> | 
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| 81 | struct _bz_doArrayIndexMapping<1> { | 
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| 82 | template<class T_numtype, int N_destRank> | 
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| 83 | static T_numtype map(const Array<T_numtype, 1>& array, | 
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| 84 | const TinyVector<int,N_destRank>& index, int i0, int, int, int, int, | 
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| 85 | int, int, int, int, int, int) | 
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| 86 | { | 
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| 87 | return array(index[i0]); | 
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| 88 | } | 
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| 89 | }; | 
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| 90 |  | 
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| 91 |  | 
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| 92 | template<> | 
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| 93 | struct _bz_doArrayIndexMapping<2> { | 
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| 94 | template<class T_numtype, int N_destRank> | 
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| 95 | static T_numtype map(const Array<T_numtype, 2>& array, | 
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| 96 | const TinyVector<int,N_destRank>& index, int i0, int i1, int, | 
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| 97 | int, int, int, int, int, int, int, int) | 
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| 98 | { | 
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| 99 | return array(index[i0], index[i1]); | 
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| 100 | } | 
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| 101 | }; | 
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| 102 |  | 
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| 103 | template<> | 
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| 104 | struct _bz_doArrayIndexMapping<3> { | 
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| 105 | template<class T_numtype, int N_destRank> | 
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| 106 | static T_numtype map(const Array<T_numtype, 3>& array, | 
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| 107 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 108 | int, int, int, int, int, int, int, int) | 
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| 109 | { | 
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| 110 | return array(index[i0], index[i1], index[i2]); | 
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| 111 | } | 
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| 112 | }; | 
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| 113 |  | 
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| 114 | template<> | 
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| 115 | struct _bz_doArrayIndexMapping<4> { | 
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| 116 | template<class T_numtype, int N_destRank> | 
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| 117 | static T_numtype map(const Array<T_numtype, 4>& array, | 
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| 118 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 119 | int i3, int, int, int, int, int, int, int) | 
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| 120 | { | 
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| 121 | return array(index[i0], index[i1], index[i2], index[i3]); | 
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| 122 | } | 
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| 123 | }; | 
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| 124 |  | 
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| 125 | template<> | 
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| 126 | struct _bz_doArrayIndexMapping<5> { | 
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| 127 | template<class T_numtype, int N_destRank> | 
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| 128 | static T_numtype map(const Array<T_numtype, 5>& array, | 
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| 129 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 130 | int i3, int i4, int, int, int, int, int, int) | 
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| 131 | { | 
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| 132 | return array(index[i0], index[i1], index[i2], index[i3], index[i4]); | 
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| 133 | } | 
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| 134 | }; | 
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| 135 |  | 
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| 136 | template<> | 
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| 137 | struct _bz_doArrayIndexMapping<6> { | 
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| 138 | template<class T_numtype, int N_destRank> | 
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| 139 | static T_numtype map(const Array<T_numtype, 6>& array, | 
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| 140 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 141 | int i3, int i4, int i5, int, int, int, int, int) | 
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| 142 | { | 
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| 143 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 144 | index[i5]); | 
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| 145 | } | 
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| 146 | }; | 
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| 147 |  | 
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| 148 | template<> | 
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| 149 | struct _bz_doArrayIndexMapping<7> { | 
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| 150 | template<class T_numtype, int N_destRank> | 
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| 151 | static T_numtype map(const Array<T_numtype, 7>& array, | 
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| 152 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 153 | int i3, int i4, int i5, int i6, int, int, int, int) | 
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| 154 | { | 
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| 155 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 156 | index[i5], index[i6]); | 
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| 157 | } | 
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| 158 | }; | 
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| 159 |  | 
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| 160 | template<> | 
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| 161 | struct _bz_doArrayIndexMapping<8> { | 
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| 162 | template<class T_numtype, int N_destRank> | 
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| 163 | static T_numtype map(const Array<T_numtype, 8>& array, | 
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| 164 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 165 | int i3, int i4, int i5, int i6, int i7, int, int, int) | 
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| 166 | { | 
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| 167 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 168 | index[i5], index[i6], index[i7]); | 
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| 169 | } | 
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| 170 | }; | 
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| 171 |  | 
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| 172 | template<> | 
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| 173 | struct _bz_doArrayIndexMapping<9> { | 
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| 174 | template<class T_numtype, int N_destRank> | 
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| 175 | static T_numtype map(const Array<T_numtype, 9>& array, | 
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| 176 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 177 | int i3, int i4, int i5, int i6, int i7, int i8, int, int) | 
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| 178 | { | 
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| 179 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 180 | index[i5], index[i6], index[i7], index[i8]); | 
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| 181 | } | 
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| 182 | }; | 
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| 183 |  | 
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| 184 | template<> | 
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| 185 | struct _bz_doArrayIndexMapping<10> { | 
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| 186 | template<class T_numtype, int N_destRank> | 
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| 187 | static T_numtype map(const Array<T_numtype, 10>& array, | 
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| 188 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 189 | int i3, int i4, int i5, int i6, int i7, int i8, int i9, int) | 
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| 190 | { | 
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| 191 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 192 | index[i5], index[i6], index[i7], index[i8], index[i9]); | 
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| 193 | } | 
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| 194 | }; | 
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| 195 |  | 
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| 196 | template<> | 
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| 197 | struct _bz_doArrayIndexMapping<11> { | 
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| 198 | template<class T_numtype, int N_destRank> | 
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| 199 | static T_numtype map(const Array<T_numtype, 11>& array, | 
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| 200 | const TinyVector<int,N_destRank>& index, int i0, int i1, int i2, | 
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| 201 | int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10) | 
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| 202 | { | 
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| 203 | return array(index[i0], index[i1], index[i2], index[i3], index[i4], | 
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| 204 | index[i5], index[i6], index[i7], index[i8], index[i9], | 
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| 205 | index[i10]); | 
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| 206 | } | 
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| 207 | }; | 
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| 208 |  | 
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| 209 | template<class P_numtype, int N_rank, int N_map0, int N_map1=0, int N_map2=0, | 
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| 210 | int N_map3=0, int N_map4=0, int N_map5=0, int N_map6=0, int N_map7=0, | 
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| 211 | int N_map8=0, int N_map9=0, int N_map10=0> | 
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| 212 | class ArrayIndexMapping { | 
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| 213 | public: | 
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| 214 | typedef P_numtype T_numtype; | 
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| 215 | typedef const Array<T_numtype,N_rank>& T_ctorArg1; | 
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| 216 | typedef int                            T_ctorArg2;    // dummy | 
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| 217 |  | 
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| 218 | /* | 
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| 219 | * This enum block finds the maximum of the N_map0, N_map1, ..., N_map10 | 
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| 220 | * parameters and stores it in maxRank10.  The rank of the expression is | 
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| 221 | * then maxRank10 + 1, since the IndexPlaceholders start at 0 rather than | 
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| 222 | * 1. | 
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| 223 | */ | 
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| 224 | enum { | 
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| 225 | maxRank1 = (N_map0 > N_map1) ? N_map0 : N_map1, | 
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| 226 | maxRank2 = (N_map2 > maxRank1) ? N_map2 : maxRank1, | 
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| 227 | maxRank3 = (N_map3 > maxRank2) ? N_map3 : maxRank2, | 
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| 228 | maxRank4 = (N_map4 > maxRank3) ? N_map4 : maxRank3, | 
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| 229 | maxRank5 = (N_map5 > maxRank4) ? N_map5 : maxRank4, | 
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| 230 | maxRank6 = (N_map6 > maxRank5) ? N_map6 : maxRank5, | 
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| 231 | maxRank7 = (N_map7 > maxRank6) ? N_map7 : maxRank6, | 
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| 232 | maxRank8 = (N_map8 > maxRank7) ? N_map8 : maxRank7, | 
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| 233 | maxRank9 = (N_map9 > maxRank8) ? N_map9 : maxRank8, | 
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| 234 | maxRank10 = (N_map10 > maxRank9) ? N_map10 : maxRank9 | 
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| 235 | }; | 
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| 236 |  | 
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| 237 | enum { numArrayOperands = 1, numIndexPlaceholders = 1, | 
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| 238 | rank = maxRank10 + 1 }; | 
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| 239 |  | 
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| 240 | ArrayIndexMapping(const Array<T_numtype, N_rank>& array) | 
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| 241 | : array_(array) | 
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| 242 | { | 
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| 243 | } | 
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| 244 |  | 
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| 245 | ArrayIndexMapping(const ArrayIndexMapping<T_numtype,N_rank,N_map0, | 
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| 246 | N_map1,N_map2,N_map3,N_map4,N_map5,N_map6,N_map7,N_map8,N_map9, | 
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| 247 | N_map10>& z) | 
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| 248 | : array_(z.array_) | 
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| 249 | { | 
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| 250 | } | 
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| 251 |  | 
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| 252 | #ifdef BZ_ARRAY_EXPR_PASS_INDEX_BY_VALUE | 
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| 253 | template<int N_destRank> | 
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| 254 | T_numtype operator()(TinyVector<int, N_destRank> i) | 
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| 255 | { | 
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| 256 | return _bz_doArrayIndexMapping<N_rank>::map(array_, i, | 
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| 257 | N_map0, N_map1, N_map2, N_map3, N_map4, N_map5, N_map6, | 
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| 258 | N_map7, N_map8, N_map9, N_map10); | 
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| 259 | } | 
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| 260 | #else | 
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| 261 | template<int N_destRank> | 
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| 262 | T_numtype operator()(const TinyVector<int, N_destRank>& i) | 
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| 263 | { | 
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| 264 | return _bz_doArrayIndexMapping<N_rank>::map(array_, i, | 
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| 265 | N_map0, N_map1, N_map2, N_map3, N_map4, N_map5, N_map6, | 
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| 266 | N_map7, N_map8, N_map9, N_map10); | 
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| 267 | } | 
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| 268 | #endif | 
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| 269 |  | 
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| 270 | int lbound(int rank) | 
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| 271 | { | 
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| 272 | if (N_map0 == rank) | 
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| 273 | return array_.lbound(0); | 
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| 274 | else if ((N_map1 == rank) && (N_rank > 1)) | 
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| 275 | return array_.lbound(1); | 
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| 276 | else if ((N_map2 == rank) && (N_rank > 2)) | 
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| 277 | return array_.lbound(2); | 
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| 278 | else if ((N_map3 == rank) && (N_rank > 3)) | 
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| 279 | return array_.lbound(3); | 
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| 280 | else if ((N_map4 == rank) && (N_rank > 4)) | 
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| 281 | return array_.lbound(4); | 
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| 282 | else if ((N_map5 == rank) && (N_rank > 5)) | 
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| 283 | return array_.lbound(5); | 
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| 284 | else if ((N_map6 == rank) && (N_rank > 6)) | 
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| 285 | return array_.lbound(6); | 
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| 286 | else if ((N_map7 == rank) && (N_rank > 7)) | 
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| 287 | return array_.lbound(7); | 
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| 288 | else if ((N_map8 == rank) && (N_rank > 8)) | 
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| 289 | return array_.lbound(8); | 
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| 290 | else if ((N_map9 == rank) && (N_rank > 9)) | 
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| 291 | return array_.lbound(9); | 
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| 292 | else if ((N_map10 == rank) && (N_rank > 10)) | 
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| 293 | return array_.lbound(10); | 
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| 294 | else | 
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| 295 | return INT_MIN;   // tiny(int()); | 
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| 296 | } | 
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| 297 |  | 
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| 298 | int ubound(int rank) | 
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| 299 | { | 
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| 300 | if (N_map0 == rank) | 
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| 301 | return array_.ubound(0); | 
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| 302 | else if ((N_map1 == rank) && (N_rank > 1)) | 
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| 303 | return array_.ubound(1); | 
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| 304 | else if ((N_map2 == rank) && (N_rank > 2)) | 
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| 305 | return array_.ubound(2); | 
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| 306 | else if ((N_map3 == rank) && (N_rank > 3)) | 
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| 307 | return array_.ubound(3); | 
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| 308 | else if ((N_map4 == rank) && (N_rank > 4)) | 
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| 309 | return array_.ubound(4); | 
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| 310 | else if ((N_map5 == rank) && (N_rank > 5)) | 
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| 311 | return array_.ubound(5); | 
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| 312 | else if ((N_map6 == rank) && (N_rank > 6)) | 
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| 313 | return array_.ubound(6); | 
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| 314 | else if ((N_map7 == rank) && (N_rank > 7)) | 
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| 315 | return array_.ubound(7); | 
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| 316 | else if ((N_map8 == rank) && (N_rank > 8)) | 
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| 317 | return array_.ubound(8); | 
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| 318 | else if ((N_map9 == rank) && (N_rank > 9)) | 
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| 319 | return array_.ubound(9); | 
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| 320 | else if ((N_map10 == rank) && (N_rank > 10)) | 
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| 321 | return array_.ubound(10); | 
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| 322 | else | 
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| 323 | return INT_MAX;   // huge(int()); | 
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| 324 | } | 
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| 325 |  | 
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| 326 | // If you have a precondition failure on this routine, it means | 
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| 327 | // you are trying to use stack iteration mode on an expression | 
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| 328 | // which contains an index placeholder.  You must use index | 
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| 329 | // iteration mode instead. | 
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| 330 | int operator*() | 
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| 331 | { | 
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| 332 | BZPRECONDITION(0); | 
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| 333 | return 0; | 
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| 334 | } | 
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| 335 |  | 
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| 336 | // See operator*() note | 
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| 337 | void push(int) | 
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| 338 | { | 
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| 339 | BZPRECONDITION(0); | 
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| 340 | } | 
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| 341 |  | 
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| 342 | // See operator*() note | 
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| 343 | void pop(int) | 
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| 344 | { | 
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| 345 | BZPRECONDITION(0); | 
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| 346 | } | 
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| 347 |  | 
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| 348 | // See operator*() note | 
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| 349 | void advance() | 
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| 350 | { | 
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| 351 | BZPRECONDITION(0); | 
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| 352 | } | 
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| 353 |  | 
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| 354 | // See operator*() note | 
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| 355 | void advance(int) | 
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| 356 | { | 
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| 357 | BZPRECONDITION(0); | 
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| 358 | } | 
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| 359 |  | 
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| 360 | // See operator*() note | 
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| 361 | void loadStride(int) | 
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| 362 | { | 
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| 363 | BZPRECONDITION(0); | 
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| 364 | } | 
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| 365 |  | 
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| 366 | _bz_bool isUnitStride(int rank) const | 
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| 367 | { | 
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| 368 | BZPRECONDITION(0); | 
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| 369 | return false; | 
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| 370 | } | 
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| 371 |  | 
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| 372 | void advanceUnitStride() | 
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| 373 | { | 
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| 374 | BZPRECONDITION(0); | 
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| 375 | } | 
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| 376 |  | 
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| 377 | _bz_bool canCollapse(int,int) const | 
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| 378 | {   BZPRECONDITION(0);  return _bz_false; } | 
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| 379 |  | 
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| 380 | T_numtype operator[](int) | 
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| 381 | { | 
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| 382 | BZPRECONDITION(0); | 
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| 383 | return T_numtype(); | 
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| 384 | } | 
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| 385 |  | 
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| 386 | T_numtype fastRead(int) | 
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| 387 | { | 
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| 388 | BZPRECONDITION(0); | 
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| 389 | return T_numtype(); | 
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| 390 | } | 
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| 391 |  | 
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| 392 | int suggestStride(int) const | 
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| 393 | { | 
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| 394 | BZPRECONDITION(0); | 
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| 395 | return 0; | 
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| 396 | } | 
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| 397 |  | 
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| 398 | _bz_bool isStride(int,int) const | 
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| 399 | { | 
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| 400 | BZPRECONDITION(0); | 
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| 401 | return _bz_true; | 
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| 402 | } | 
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| 403 |  | 
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| 404 | template<int N_rank2> | 
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| 405 | void moveTo(const TinyVector<int,N_rank2>& i) | 
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| 406 | { | 
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| 407 | BZPRECONDITION(0); | 
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| 408 | return ; | 
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| 409 | } | 
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| 410 |  | 
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| 411 | void prettyPrint(string& str, prettyPrintFormat& format) const | 
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| 412 | { | 
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| 413 | // NEEDS_WORK-- do real formatting for reductions | 
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| 414 | str += "map[NEEDS_WORK]"; | 
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| 415 | } | 
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| 416 |  | 
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| 417 | template<class T_shape> | 
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| 418 | _bz_bool shapeCheck(const T_shape& shape) const | 
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| 419 | { | 
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| 420 | // NEEDS_WORK-- do a real shape check (tricky) | 
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| 421 | return _bz_true; | 
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| 422 | } | 
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| 423 |  | 
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| 424 | private: | 
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| 425 | ArrayIndexMapping() { } | 
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| 426 |  | 
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| 427 | const Array<T_numtype, N_rank>& array_; | 
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| 428 | }; | 
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| 429 |  | 
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| 430 | BZ_NAMESPACE_END | 
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| 431 |  | 
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| 432 | #endif // BZ_ARRAYMAP_H | 
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| 433 |  | 
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