On 01/17/2018 08:42 AM, Ian Romanick wrote: > On 01/17/2018 03:53 AM, Nicolai Hähnle wrote: >> Fun fact #2: These values are simply a natural encoding of the operation >> as a table of bit values. The result of the logic op is: >> >> result_bit = (logic_op >> (2 * src_bit + dst_bit)) & 1 > > Oh interesting. > >> That OpenGL has them reversed is really quite odd. I'd love to hear the >> history behind it. > > Big endian vs little endian perhaps?
Actually... it's not even that. It's just a different equation for the same thing: result_bit = logic_op & (1 << (2 * src_bit + dst_bit)) Everybody learns something new today. :) >> (I think it might be useful to add this information in the comment, but >> I'll leave that decision up to you.) _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
