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