[Libre-soc-bugs] [Bug 776] Documentation of designs, code, processes, and other relevant things as needed

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=776

--- Comment #3 from Konstantinos Margaritis (markos) <konstantinos at vectorcamp.gr> ---
(In reply to Jacob Lifshay from comment #2)
> unfortunately, because a long-multiply needs 2 kinds of insns
> (carrying-wide-madd and carrying-add), you can't easily do that as a REMAP
> schedule. Additionally, it is substantially faster to use Karatsuba
> multiplication once you get inputs more than a few hundred bits wide (and
> other more complex algorithms for wider multiplies).

I would pick the simplest and fastest to implement long-multiply method for
this one, speed is not a requirement. We can always optimize later.

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