tg at swox.com
Wed Sep 12 18:43:13 CEST 2007
i have an interest on computer architecture (specifying my own
architectures, their implementations -- soft cores -- and tools) and
recently i had a specific need for optimizing code sequences (integer
arithmetic library development for my processor). This where gmp and the
recently announced (by Tobjorn) superopt-va come in place.
I doubt superopt-va is useful for that, as it is not specific to any
You may want to port the GNU superopt to your processor.
To my understanding the superopt-va is written from scratch, and some
things that where implemented in the GNU superopt, are not there (yet)
Well, they do and will always do quite different things.
The "va" in superopt-va is for Vector Algebra.
2) Is it possible to specify unsigned words (assuming that the default
is signed words), e.g. via the regular type casting? I remember this was
available for the GNU superopt.
Be my guest.
3) What is this Toom arithmetic? I have never heard about it yet. Where
is it used (this might be a little OT, but it seems that Toom functions
are the only benchmark that the new superopt has been exercised on.)
I mean the arithmetic needed in Toom's multiplication algorithm. (Or
specifically the polynomial evaluation needed therein, the
interpolation does not fit, but there has been other work in that
area, see www.bodrato.it.)
4) Is "superopt-va" going to be included in tests/devel directory of the
gmp release? I have added the related files to this dir in my own copy.
Or is it considered very alpha for that?
I don't have any plans for including in GMP.
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