1 Reply Latest reply on Apr 21, 2015 8:45 AM by jtrudeau

    double-double for opencl


      I'm after more precision than double.


      There is a couple of double-double libraries for CUDA

      One from Nvidia https://devtalk.nvidia.com/default/topic/509693/double-double-precision-arithmetic-library-now-available/

      Another is open source https://code.google.com/p/gpuprec/


      Are there any for opencl?

      I only need basic arithmetic and inverse square root.


      What I really needs is the vector form (i.e.doubledouble4).


      I believe the older amd graphics cards used 4 float ALU's to do double precision.

      Is this exposed in some low level manner that would lend it to higher levels of precision.

      i.e. quad from 4 double precision ALU's