libFLAC/lpc_intrin_sse.c : New SSE code to calculate autocorrelation.
Accelerate FLAC__lpc_compute_autocorrelation_intrin_sse_lag_NN routines for AMD and newer Intel CPUs (means Core i aka Nehalem and newer). Unfortunately it's slower on older Intel CPUs. According to tests at HA: <http://www.hydrogenaud.io/forums/index.php?s=&showtopic=101082&view=findpost&p=870753> CPU flac -5 flac -8 Athlon XP +5 % +2.4 % Athlon 64 X2 +9 % +4 % Core i +7 % +1 % ... +2.7 % Core 2 ? -3.5 % According to Steam HW survey <http://store.steampowered.com/hwsurvey/> 69% of Steam users have SSE4.2 which means that the new code is faster for them. There are also AMD users that don't have SSE4.2, so 75% of Steam users should benefit from this patch. Patch-from: lvqcl <firstname.lastname@example.org>