[Haskell-cafe] question regarding Data.Array.Accelerate

Philipp philipp.kant at web.de
Sun Feb 12 03:33:21 CET 2012


I have read the papers about the accelerate package that provides a
high-level interface to nvidia's cuda library and am very intrigued. 
However, I have some start-up problems.  Is this the right place for such

In particular, I'm having trouble with lifting and unlifting.  From what I
understood, I should be able to use unlift to get an Int from an Exp (Plain
Int), but when I try, for example,

(unlift . lift) (1::Int) :: Int

ghci complains with 

"No instance for (Unlift Int)".

I have the latest versions of accelerate (accelerate- and ghc
(version 7.4.1).

I think I'm missing something obvious, so if any of you could point it out
to me I would be glad.


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