063d8edea1
- now that I re-examined the code, the note in commit 51fd6327a6
can be mostly ignored
PackedList isMaster(nPoints, 1u);
is not really inefficient at all, since the '1u' is packed into
32/64-bits before the subsequent assignment and doesn't involve
shifts/masking for each index
The same misinformation applies to the PackedList(size, 0u) form.
It isn't much slower at all.
Nonetheless, add bool specialization so that it is a simple assign.
178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Application
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Description
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "uLabel.H"
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#include "IOobject.H"
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#include "IOstreams.H"
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#include "IFstream.H"
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#include "PackedBoolList.H"
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#include <climits>
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using namespace Foam;
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template<unsigned nBits>
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inline void reportInfo()
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{
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unsigned offset = PackedList<nBits>::packing();
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unsigned useSHL = ((1u << (nBits * offset)) - 1);
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unsigned useSHR = (~0u >> (sizeof(unsigned)*CHAR_BIT - nBits * offset));
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Info<< nl
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<< "PackedList<" << nBits << ">" << nl
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<< " max_value: " << PackedList<nBits>::max_value() << nl
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<< " packing: " << PackedList<nBits>::packing() << nl
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<< " utilization: " << (nBits * offset) << nl;
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Info<< " Masking:" << nl
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<< " shift << " << unsigned(nBits * offset) << nl
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<< " shift >> " << unsigned((sizeof(unsigned)*CHAR_BIT) - nBits * offset)
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<< nl;
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hex(Info);
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Info<< " maskLower: " << PackedList<nBits>::maskLower(PackedList<nBits>::packing())
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<< nl
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<< " useSHL: " << useSHL << nl
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<< " useSHR: " << useSHR << nl;
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if (useSHL != useSHR)
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{
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Info<< "WARNING: different results for SHL and SHR" << nl;
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}
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Info<< nl;
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dec(Info);
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::noParallel();
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argList::validArgs.insert("file .. fileN");
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argList::addBoolOption("mask", "report information about the bit masks");
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argList::addBoolOption("count", "test the count() method");
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argList::addBoolOption
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(
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"info",
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"print an ascii representation of the storage"
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);
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argList args(argc, argv, false, true);
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if (args.optionFound("mask"))
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{
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Info<< "bit width: " << unsigned(sizeof(unsigned)*CHAR_BIT) << endl;
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reportInfo<1>();
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reportInfo<2>();
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reportInfo<3>();
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reportInfo<4>();
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reportInfo<5>();
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reportInfo<6>();
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reportInfo<7>();
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reportInfo<8>();
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reportInfo<9>();
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reportInfo<10>();
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reportInfo<11>();
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reportInfo<12>();
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reportInfo<13>();
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reportInfo<14>();
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reportInfo<15>();
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reportInfo<16>();
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reportInfo<17>();
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reportInfo<18>();
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reportInfo<19>();
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reportInfo<20>();
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reportInfo<21>();
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reportInfo<22>();
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reportInfo<23>();
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reportInfo<24>();
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reportInfo<25>();
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reportInfo<26>();
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reportInfo<27>();
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reportInfo<28>();
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reportInfo<29>();
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reportInfo<30>();
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reportInfo<31>();
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return 0;
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}
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else if (args.additionalArgs().empty())
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{
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args.printUsage();
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}
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forAll(args.additionalArgs(), argI)
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{
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const string& srcFile = args.additionalArgs()[argI];
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Info<< nl << "reading " << srcFile << nl;
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IFstream ifs(srcFile);
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List<label> rawLst(ifs);
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PackedBoolList packLst(rawLst);
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Info<< "size: " << packLst.size() << nl;
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if (args.optionFound("count"))
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{
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unsigned int rawCount = 0;
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forAll(rawLst, elemI)
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{
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if (rawLst[elemI])
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{
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rawCount++;
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}
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}
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Info<< "raw count: " << rawCount << nl
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<< "packed count: " << packLst.count() << nl;
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}
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if (args.optionFound("info"))
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{
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packLst.print(Info);
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}
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Info<< nl;
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IOobject::writeDivider(Info);
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}
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return 0;
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}
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// ************************************************************************* //
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