[Ecls-list] Ecl version of with-float-traps-masked and vector-sap?

[Raymond Toy]

On Wed, Feb 8, 2012 at 12:38 PM, Juan Jose Garcia-Ripoll

>
>>>
>>>> and vector-sap?
>>>>
>>>
>>> Hmm, is this for the CFFI? Because it is going to depend very much on
>>> what VECTOR-SAP has to return. For UFFI you have
>>> SI::MAKE-FOREIGN-DATA-FROM-ARRAY which takes an array and returns an UFFI
>>> pointer. Alternatively, C-INLINE may be easily used to retrieve the pointer
>>> in a C format.
>>>
>>
>> Thanks for the tips.  I'm not very familiar with cffi or uffi.
>> Basically, vector-sap needs to return something that can be made into a
>> pointer for a foreign function to use as the address of an array/vector.
>>
>
> I do not know how MATLISP invokes BLAS or equivalent functions. If you
> need a pointer, then you need to know in which format MATLISP needs it.
>

The pointer is a C style pointer to a vector of double-floats.


>
> I had a look at MATLISP. It is probably not unconceivable to translate it
> all to ECL's FFI constructs. Seems that all the fortran interface is in one
> file (ffi-*.lisp) and generates code automatically. Producing the
> associated C code would be easy and more efficient.
>
>
I don't doubt this, but since I'm not at all familiar with ecl's ffi, I'd
like to leverage cffi to do all the dirty work.

Ray
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