On Mon, Mar 30, 2015 at 11:54 AM, Matt Turner <matts...@gmail.com> wrote: > On Sat, Mar 28, 2015 at 11:03 AM, Jason Ekstrand <ja...@jlekstrand.net> wrote: >> On Fri, Mar 27, 2015 at 9:22 PM, Matt Turner <matts...@gmail.com> wrote: >>> The typical case of mat4*mat4*vec4 is 80 scalar multiplications, but >>> mat4*(mat4*vec4) is only 32. >>> >>> On HSW (with vec4 vertex shaders): >>> instructions in affected programs: 4420 -> 3194 (-27.74%) >>> >>> On BDW (with scalar vertex shaders): >>> instructions in affected programs: 12756 -> 6726 (-47.27%) >> >> Do you have any actual benchmark results with something that's >> affected? That would be nice to know. > > OglDrvShComp: 2.17761% +/- 0.324342% (n=12) > > It draws a bunch of different scenes (from other benchmarks), so I > tried some of the other benchmarks, but couldn't find anything > interesting. I'm guessing the patch is just improving compile > performance which affects this benchmark. > > IIRC this is the one that Ken's loop unrolling patch really harmed > performance of, so yeah, it's probably because of compile performance. > Not interesting.
That's dissapointing. It's probably worth it for VS. --Jason _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
