On Sun, Feb 8, 2015 at 5:51 PM, Dave Airlie <airl...@gmail.com> wrote: > On 9 February 2015 at 08:44, Aditya Avinash <adityaavina...@gmail.com> wrote: >> Ya. I just want to know that part "only some r600". >> I believe some of the nv0 cards doesn't support double. You have any ideas >> or suggestions to make it possible? > > For AMD > http://en.wikipedia.org/wiki/List_of_AMD_graphics_processing_units > > has what cards directly support double precision for r600/700/evergreen > > The plan is to implement a soffloat library like the fglrx drivers do for the > GPUs that don't do doubles just to satisfy the GL4.0 requirement. > > Whether we implement this in GLSL, NIR or in the backends is currently > an open question. > > Not sure what the nvidia limitations are if any.
All of the Fermi+ cards have pretty full hw support. The only lacking area is that they only compute the upper 32 bits of a RSQ and RCP operation, but that's solvable with a bit of Newton-Raphson magic. The G200 chip (NVA0) is the only Tesla-family chip which has some fp64 support, but it's missing some useful operations, like any sort of sqrt or division-related functionality. But it can add/multiply. Some sort of partial softfloat may be useful there, but... it can be difficult to care about the single high-end chip of the old family. -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
