>________________________________ > From: Carl Poirier <carl.poirie...@gmail.com> >To: Vesa Solonen <vesa.solo...@aalto.fi> >Cc: KiCad Developers <kicad-developers@lists.launchpad.net> >Sent: Thursday, January 23, 2014 4:41 AM >Subject: Re: [Kicad-developers] Net names and net codes > > > >Maybe. Having no experience whatsoever in vectorization, I'm looking into >multithreading. Anyway, I believe one doesn't exclude the other. > > > >
For over a year now, compiling with gcc (I can't remember the exact version of this change) with -O3 performs auto-vectorization. Unless you can see significant gain in structuring some loops so that the compiler algorithms can make a more efficient vectorization, just compile with -O3 and don't worry about it. A little off topic: If -O3 shows up problems in some places (this is not uncommon with something as complex as an optimizing compiler) you can still attempt at a different optimization level and by using the explicit flags to enable vectorization. In cases where a compiler's vectorization code isn't working well and introducing bugs, then the only solution is to explicitly invoke the SIMD instructions ... and really, I see no reason for that and would simply disable auto-vectorization until the compiler is fixed. - Cirilo _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : kicad-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
