On Fri, Feb 20, 2015 at 10:06 AM, dave <[email protected]> wrote: > On 02/19/2015 04:58 PM, Steve Borho wrote: >> >> On 02/19, [email protected] wrote: >>> >>> # HG changeset patch >>> # User David T Yuen <[email protected]> >>> # Date 1424385856 28800 >>> # Node ID 28287b57013e9c43488bfba1570ded5cfb4af16d >>> # Parent 039ea966d5ebccab1de2c3766fb7b4f125d2020a >>> asm: dct8 sse2 1.88x improvement over c code >>> >>> This is backported from dct8 sse4 >> >> it would be helpful for reviewers if you could tell us which CPUs this >> will help and by how much. > > This is intended for cpus that support up to sse3 and until an ssse3 dct8 > primitive is developed, also ssse3. The following is from testing on my > sse3 system > > dct8x8 1.88x 11202.50 21044.87 > >> If your CPU does not have SSE4 would the >> encoder use the C reference if this primitive were not present? > > Yes, this replaces the C reference on systems with sse2 to ssse3.
thanks, queued with this info added to the commit message -- Steve Borho _______________________________________________ x265-devel mailing list [email protected] https://mailman.videolan.org/listinfo/x265-devel
