On Thu, Aug 6, 2015 at 4:36 AM, Thomas Helland <thomashellan...@gmail.com> wrote: > -NaN != NaN, and -Inf != Inf, so this should be safe. > Found while working on my VRP pass. > > Shader-db results on my IVB: > total instructions in shared programs: 1698267 -> 1698067 (-0.01%) > instructions in affected programs: 15785 -> 15585 (-1.27%) > helped: 36 > HURT: 0 > GAINED: 0 > LOST: 0 > > Some shaders was found to have the following pattern in NIR: > vec1 ssa_26 = fneg ssa_21 > vec1 ssa_27 = fne ssa_21, ssa_26 > > Make that: > vec1 ssa_27 = fne ssa_21, 0.0f > > This is found in Dota2 and Brutal Legend. > One shader is cut by 8%, from 323 -> 296 instructons in SIMD8 > > Signed-off-by: Thomas Helland <thomashellan...@gmail.com> > ---
I have seen this pattern before and I believe this is safe. Reviewed-by: Matt Turner <matts...@gmail.com> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
