On Wed, Nov 21, 2007 at 07:11:02PM +0100, Pieter Palmers wrote: > It is worthwhile to specify whether the CPU is a pentium or not: > i.e.: -march=pentium > since this enables more efficient float <=> int conversion. The > performance penalty of the stock GCC conversion is rather large. > > if you can figure out during configuration whether the architecture is > i686 and supports mmx/sse, the following will gain you even more float > performance: > -mmmx -msse -mfpmath=sse
This is the purpose of my 'tuned' optimisation. As Albert says it only works with gcc >= 4.2.0 but it saves having to work out ourselves which CPU features are supported. It's a shame it took so long for gcc to get this feature, but now that it has it, it doesn't seem worth us trying to duplicate it for older versions. Ben ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Mixxx-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mixxx-devel
