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double-double for opencl

Question asked by moozoo on Apr 19, 2015
Latest reply on Apr 21, 2015 by jtrudeau

I'm after more precision than double.


There is a couple of double-double libraries for CUDA

One from Nvidia

Another is open source


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