[vsipl++] [patch] support for non-contiguous rows or columns with Cell FFTM

[Don McCoy]

Don McCoy wrote: 
> Thanks for catching that Stefan.  I've fixed the attached patch and 
> tested it locally.  I'm presently adding test cases to the FFT 
> "backend" test (tests/fft_be.cpp), but will include those changes in a 
> separate patch.

And here is that patch.  In putting this together I found and fixed two 
defects in the Cell FFT code.  Yay!  The tests for FFTM also cover using 
column-major data when doing column-wise FFT's, including the case where 
the columns are not dense (tightly packed), as is the case when a 
subview of a matrix is taken (i.e. every other row, etc...).

Note also this patch includes the changes from the previous patch as well.

The changes in FFT require that FFT_BE_TESTS be defined in order to run 
the backend-specific tests.  Without it, the test presently fails to 
compile because the CBE backend does not support 2-D and 3-D FFT's as of 
yet.

Regards,

-- 
Don McCoy
don (at) CodeSourcery
(888) 776-0262 / (650) 331-3385, x712

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