On Tue, Aug 18, 2015 at 6:57 PM, Matt Turner <matts...@gmail.com> wrote: > On Tue, Aug 18, 2015 at 6:49 PM, Ilia Mirkin <imir...@alum.mit.edu> wrote: >> Some shaders appear to extract bits using shift/and combos. Detect >> (some) of those and convert to EXTBF instead. > > What is EXTBF? Extract byte to float? > > I ask because Unigine Heaven has shaders that pack 3x byte-integers > into one component of a vec4 and extracts them with shifts/ands and > converts them to floats, and i965 could do the extraction and > conversion in a single instruction. I'm curious if this is the same > thing you're optimizing.
Well, I apparently just needed to read your second patch's commit message to confirm my suspicions. > I thought about adding an extract_byte(src, byte_num) operation, but > i965's copy propagation caused me some headache and I shelved it. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
