On Mon, Feb 11, 2019 at 8:44 PM Jason Ekstrand <ja...@jlekstrand.net> wrote: > > This fixes a bug in runscape where we were optimizing x >> 16 to an > extract and then negating and converting to float. The NIR to fs pass > was dropping the negate on the floor breaking a geometry shader and > causing it to render nothing. > > Fixes: 1f862e923cb "i965/fs: Optimize float conversions of byte/word..." > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109601 > Cc: Matt Turner <matts...@gmail.com> > --- > src/intel/compiler/brw_fs_nir.cpp | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/src/intel/compiler/brw_fs_nir.cpp > b/src/intel/compiler/brw_fs_nir.cpp > index b80f4351b49..204640ac726 100644 > --- a/src/intel/compiler/brw_fs_nir.cpp > +++ b/src/intel/compiler/brw_fs_nir.cpp > @@ -510,6 +510,11 @@ fs_visitor::optimize_extract_to_float(nir_alu_instr > *instr, > src0->op != nir_op_extract_i8 && src0->op != nir_op_extract_i16) > return false; > > + /* If either opcode has source modifiers, bail. */ > + if (instr->src[0].abs || instr->src[0].negate || > + src0->src[0].abs || src0->src[0].negate)
You've done something weird here to vertically align things. I don't know if I like it, but if you're doing to indent the 'src0' so that the rest aligns then at least be consistent and align both 'src0's :) > + return false; > + We could handle this better by allowing the optimization if we're extracting the high byte/word. In that case I think we could safely apply the source mod. We should do that separately, but it might be nice to leave a FINISHME here so we'll remember. Reviewed-by: Matt Turner <matts...@gmail.com> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
