On 25 November 2010 23:29, Garth N. Wells <[email protected]> wrote: > > > On 25/11/10 20:17, Anders Logg wrote: >> >> On Thu, Nov 25, 2010 at 05:55:36PM +0000, Garth N. Wells wrote: >>> >>> >>> On 25/11/10 17:34, Anders Logg wrote: >>>> >>>> On Thu, Nov 25, 2010 at 05:07:40PM +0000, Garth N. Wells wrote: >>>>> >>>>> There is a dependency on >>>>> >>>>> dolfin/ode/SORSolver.h >>>>> >>>>> in dolfin/common/real.cpp. This seems odd to me. Is there a reason for >>>>> it? >>>>> >>>>> Garth >>>> >>>> real.h/cpp provide some basic algorithms that work on high precision >>>> floats. One of these is the matrix exponential which is computed by a >>>> rational approximation, hence the need for solving a linear system. >>>> >>>> The SORSolver is the only solver in DOLFIN that handles high precision >>>> floats (uBLAS etc can't be used). >>> >>> What is the typical system size? >>> >>> Garth >> >> We have used it for (dense) matrices of size up to 100 x 100 for >> computing quadrature weights etc for the cG(100) method. >> > > You could try Armadillo? I guess it can be templated over the higher > precision floats.
Yes. With uBLAS the problem was that, even if it is templated, it relied on non-templated code (eg. stuff in cmath). Also Peter Gottschling claims that MTL4 can do this. Maybe it is worth a try? > > Garth > >> -- >> Anders > _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : [email protected] Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
