On Tue, Oct 01, 2013 at 02:49:21PM -0400, Justin Ruggles wrote: > On 10/01/2013 01:44 PM, Diego Biurrun wrote: > >The mmxext optimizations should be faster if available and should > >thus override the amd3dnow optimizations, not the other way around. > > Should be faster? or are faster?
17:34 <@DonDiego> pengvado, Skyler_, BBB, can there be cases where amd3dnow is faster than mmxext? 13:20 <@pengvado> DonDiego: any instruction that has both a 3dnow version and a mmxext version will be equally fast on both. 3dnow could be faster only if you're using it for float on a cpu that doesn't have sse1. 13:23 <@pengvado> there is some 3dnow float (e.g. fft), but float functions don't have mmx ext versions. 13:24 <@DonDiego> pengvado: ok, thx Diego _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
