Thanks for interesting information. Is it better to avoid sqrt? ______________________________
Anton Gladkyy 2010/6/14 Václav Šmilauer <eudo...@arcig.cz> > FYI this is a file that evaluates cost of various ops when optimizing > (for i386): > > http://repo.or.cz/w/official-gcc.git/blob/trunk:/gcc/config/i386/i386.c > > It is grouped by processor models; interesting is that (for core2 > family) sqrt costs 58, float division 32 (!), float multiplication 5 > (for AMD k8 processors, it is 35 for sqrt and 19 for fdiv). (that > doesn't mean that you should rewrite * to /, gcc is smart enough to > precompute if used multiple times) > > Cheers, v. > > > > > _______________________________________________ > Mailing list: > https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> > Post to : yade-dev@lists.launchpad.net > Unsubscribe : > https://launchpad.net/~yade-dev<https://launchpad.net/%7Eyade-dev> > More help : https://help.launchpad.net/ListHelp >
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