valarray-inst.cc revision 169691
1// Explicit instantiation file. 2 3// Copyright (C) 2001, 2004, 2005 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// 31// ISO C++ 14882: 32// 33 34#include <valarray> 35 36_GLIBCXX_BEGIN_NAMESPACE(std) 37 38 // Some explicit instantiations. 39 template void 40 __valarray_fill(size_t* __restrict__, size_t, const size_t&); 41 42 template void 43 __valarray_copy(const size_t* __restrict__, size_t, size_t* __restrict__); 44 45 template valarray<size_t>::valarray(size_t); 46 template valarray<size_t>::valarray(const valarray<size_t>&); 47 template valarray<size_t>::~valarray(); 48 template size_t valarray<size_t>::size() const; 49 template size_t& valarray<size_t>::operator[](size_t); 50 51 inline size_t 52 __valarray_product(const valarray<size_t>& __a) 53 { 54 typedef const size_t* __restrict__ _Tp; 55 const size_t __n = __a.size(); 56 // XXX: This ugly cast is necessary because 57 // valarray::operator[]() const return a VALUE! 58 // Try to get the committee to correct that gross error. 59 valarray<size_t>& __t = const_cast<valarray<size_t>&>(__a); 60 return __valarray_product(&__t[0], &__t[0] + __n); 61 } 62 63 // Map a gslice, described by its multidimensional LENGTHS 64 // and corresponding STRIDES, to a linear array of INDEXES 65 // for the purpose of indexing a flat, one-dimensional array 66 // representation of a gslice_array. 67 void 68 __gslice_to_index(size_t __o, const valarray<size_t>& __l, 69 const valarray<size_t>& __s, valarray<size_t>& __i) 70 { 71 // There are as much as dimensions as there are strides. 72 size_t __n = __l.size(); 73 74 // Get a buffer to hold current multi-index as we go through 75 // the gslice for the purpose of computing its linear-image. 76 size_t* const __t = static_cast<size_t*> 77 (__builtin_alloca(__n * sizeof (size_t))); 78 __valarray_fill(__t, __n, size_t(0)); 79 80 // Note that this should match the product of all numbers appearing 81 // in __l which describes the multidimensional sizes of the 82 // the generalized slice. 83 const size_t __z = __i.size(); 84 85 for (size_t __j = 0; __j < __z; ++__j) 86 { 87 // Compute the linear-index image of (t_0, ... t_{n-1}). 88 // Normaly, we should use inner_product<>(), but we do it the 89 // the hard way here to avoid link-time can of worms. 90 size_t __a = __o; 91 for (size_t __k = 0; __k < __n; ++__k) 92 __a += __s[__k] * __t[__k]; 93 94 __i[__j] = __a; 95 96 // Process the next multi-index. The loop ought to be 97 // backward since we're making a lexicagraphical visit. 98 ++__t[__n - 1]; 99 for (size_t __k2 = __n - 1; __k2; --__k2) 100 { 101 if (__t[__k2] >= __l[__k2]) 102 { 103 __t[__k2] = 0; 104 ++__t[__k2 - 1]; 105 } 106 } 107 } 108 } 109 110 gslice::_Indexer::_Indexer(size_t __o, const valarray<size_t>& __l, 111 const valarray<size_t>& __s) 112 : _M_count(1), _M_start(__o), _M_size(__l), _M_stride(__s), 113 _M_index(__l.size() == 0 ? 0 : __valarray_product(__l)) 114 { __gslice_to_index(__o, __l, __s, _M_index); } 115 116_GLIBCXX_END_NAMESPACE 117