| commit | e9d805dd4374cead02a4e991515bae3bf9547e43 | |
| author | Erik de Castro Lopo <erikd@mega-nerd.com> | |
| Sat, 9 Aug 2014 02:32:57 +0000 (9 12:32 +1000) | ||
| committer | Erik de Castro Lopo <erikd@mega-nerd.com> | |
| Sat, 9 Aug 2014 02:49:27 +0000 (9 12:49 +1000) | ||
| tree | ecdbdea901734e4c6c663796414db3518e4a6483 | treesnapshot (tar.gz zip) |
| parent | 0ae3e4689dbd69d9452c0e3e66b1cd54e10b7101 | commitdiff |
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 <lvqcl.mail@gmail.com>
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 <lvqcl.mail@gmail.com>
| src/libFLAC/lpc_intrin_sse.c | diffblobblamehistory |