On Tue, Aug 18, 2015 at 6:49 PM, Ilia Mirkin <[email protected]> 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. I thought about adding an extract_byte(src, byte_num) operation, but i965's copy propagation caused me some headache and I shelved it. _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
