[patch] RBO - Re: [vsipl++] [patch] RBO preview

[Jules Bergmann]

This is an updated RBO patch, that should be ready to check in.  It adds 
support for distributed expressions, and has been validated (all tests 
pass using the IPP/MKL backends on cugel, and all tests either pass or 
use too much VM using the FFTW backend on belgarath).

It also has the following:
  - Fft_return_functor is now templatized by block type, rather than
    view type (it continues to store the operand by block).  This makes
    the conversion from distributed block to local block easier.
  - Return_block and Fft_return_functor properly hide their member
    data, and provide accessor functions.  This necessitates using
    const references/pointers to FFT Workspaces and FFT backends.
    I made the workspace member functions const correct, but did not
    attempt this for the backends.
  - Diagnostics for ext_data.
  - Moves files around: RBO is part of the optimized implementation,
    not the ref-impl.
  - Adds error checking to fastconv benchmark.

It includes some unrelated benchmark updates for characterizing 
performance on the PowerStream.

Ok to commit?

				-- Jules

Jules Bergmann wrote:
> This patch
>  - adds RBO support,
>  - applies it to by-value FFT and FFTM,
>  - adds a simple RBO evaluator for expressions like 'A = fft(B)'
>    which avoids the temporary and copy,
>  - adds fastconv RBO evaluators for the general case using Fftm
>    underneath, and the special case when using Cbe Fastconv underneath.
>  - adds single-line fastconv case to the fastconv benchmark
> 
> This patch is fairly close to ready.  However there are a few bits missing:
>  - add distributed support for Return_expr_blocks
>  - validation (this does work for the fastconv benchmark)
> 
> Comments?

-- 
Jules Bergmann
CodeSourcery
jules at codesourcery.com
(650) 331-3385 x705
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