On Wednesday, August 10, 2016 10:58:49 AM PDT Ian Romanick wrote: > On 08/09/2016 07:30 PM, Kenneth Graunke wrote: > > On Haswell (GL 3.3): > > > > total instructions in shared programs: 6211485 -> 6211427 (-0.00%) > > instructions in affected programs: 16260 -> 16202 (-0.36%) > > helped: 25 > > HURT: 37 > > > > On Broadwell (GL 4.4): > > > > total instructions in shared programs: 11640288 -> 11640218 (-0.00%) > > instructions in affected programs: 16313 -> 16243 (-0.43%) > > helped: 27 > > HURT: 37 > > Interesting... I had a similar version of this that worked on arbitrary > length sequences of (b2f(a_0) + .. b2f(a_n)), but I didn't get any > benefit. I also had tests for a couple other relational operators with > 0 that didn't see benefit. Maybe one of us should try to revive my old, > more generic series at some point. > > For now, this patch is > > Reviewed-by: Ian Romanick <ian.d.roman...@intel.com>
I believe I first saw this sequence after my bcsel -1.0 -0.0 optimization. I also imported over 11,000 more shaders recently - probably after you last did this experiment.
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