/usr/include/palabos/latticeBoltzmann/roundOffPolicy.h is in libplb-dev 1.5~r1+repack1-2build2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /* This file is part of the Palabos library.
*
* Copyright (C) 2011-2015 FlowKit Sarl
* Route d'Oron 2
* 1010 Lausanne, Switzerland
* E-mail contact: contact@flowkit.com
*
* The most recent release of Palabos can be downloaded at
* <http://www.palabos.org/>
*
* The library Palabos is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* The library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Definition of policies for minimization of round-off errors -- header file
*/
#ifndef ROUND_OFF_POLICY_H
#define ROUND_OFF_POLICY_H
#include "core/globalDefs.h"
namespace plb {
/// Convert a Skordos-optimized representation of f (i.e. fBar) into the conventional one.
/** This function cannot be part of the RoundOffPolicy class, because it needs
* awareness of specific lattice information (the t_i).
*/
template<typename T, template<typename U> class Descriptor>
inline T fullF(T fBar, plint iPop) {
return fBar + Descriptor<T>::SkordosFactor()*Descriptor<T>::t[iPop];
}
/// Convert a conventional representation of the f into a Skordos-optimized one (i.e. fBar).
/** This function cannot be part of the RoundOffPolicy class, because it needs
* awareness of specific lattice information (the t_i).
*/
template<typename T, template<typename U> class Descriptor>
inline T fBar(T fullF, plint iPop) {
return fullF - Descriptor<T>::SkordosFactor()*Descriptor<T>::t[iPop];
}
template<typename T>
struct NoOptimizationRoundOffPolicy {
static int SkordosFactor() {
return 0;
}
static T rhoBar(T rho) {
return rho;
}
static T fullRho(T rhoBar) {
return rhoBar;
}
static T invRho(T rhoBar) {
return (T)1 / rhoBar;
}
static T rhoMinus1(T rhoBar) {
return rhoBar - (T)1;
}
};
template<typename T>
struct DefaultRoundOffPolicy {
static int SkordosFactor() {
return 1;
}
static T rhoBar(T rho) {
return rho - (T)1;
}
static T fullRho(T rhoBar) {
return rhoBar + (T)1;
}
static T invRho(T rhoBar) {
return (T)1 / (rhoBar + (T)1);
}
static T rhoMinus1(T rhoBar) {
return rhoBar;
}
};
template<typename T>
struct LinearRoundOffPolicy {
static int SkordosFactor() {
return 1;
}
static T rhoBar(T rho) {
return rho - (T)1;
}
static T fullRho(T rhoBar) {
return rhoBar + (T)1;
}
static T invRho(T rhoBar) {
return (T)1 - rhoBar;
}
static T rhoMinus1(T rhoBar) {
return rhoBar;
}
};
template<typename T>
struct Order2RoundOffPolicy {
static int SkordosFactor() {
return 1;
}
static T rhoBar(T rho) {
return rho - (T)1;
}
static T fullRho(T rhoBar) {
return rhoBar + (T)1;
}
static T invRho(T rhoBar) {
return (T)1 - rhoBar + rhoBar*rhoBar;
}
static T rhoMinus1(T rhoBar) {
return rhoBar;
}
};
template<typename T>
struct Order3RoundOffPolicy {
static int SkordosFactor() {
return 1;
}
static T rhoBar(T rho) {
return rho - (T)1;
}
static T fullRho(T rhoBar) {
return rhoBar + (T)1;
}
static T invRho(T rhoBar) {
return (T)1 - rhoBar + rhoBar*rhoBar - rhoBar*rhoBar*rhoBar;
}
static T rhoMinus1(T rhoBar) {
return rhoBar;
}
};
} // namespace plb
#endif
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