[Libre-soc-bugs] [Bug 864] implement parallel prefix reduction in simulator

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=864

--- Comment #7 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #6)
> (In reply to Jacob Lifshay from comment #4)
> 
> > the result not being in a statically predicable location renders predicated
> > reduction *all but useless* from a compiler perspective
> 
> dynamically predictable.  result will always be in the position
> of the very first predicate-bit.
> sv.mv with source
i think you meant dest

> set to scalar and mask set to the same predicate
> gets that, predictably.

yes, but, because sv.mv rt.s, ra.v acts like a mv.x, it'll likely be very
slow...imho it should be avoided.

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