<GenTooMan>
nmigen is not exactly backward compatible is it. I wish new docs existed for it. Well I'm bleeding edge (unfortunately). Unfortunately I have more than one clock domain. I will have to look at how to use device specific stuff. Way more than my weak skills normally handles.
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<futarisIRCcloud>
I just saw r2con just recently started...
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<keesj>
futarisIRCcloud: yea also some currter + Ghidra decompiler news
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<florolf>
s
<florolf>
oops.
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<ZirconiumX>
Does anybody have any references on how to turn a 1-at-a-time sequential algorithm to an N-at-a-time sequential algorithm? For example, Bresenham's line algorithm is a pixel at a time; how does one make it two or four pixels at a time?
<mwk>
hmm
<mwk>
sounds non-trivial?
<mwk>
are you asking specifically about Bresenham?
<davidc__>
I think it would have to depend on the algorithm
<mwk>
wrt line rasterization, I suppose you could have a "big step" loop that goes every 8 pixels or so and a "small step" loop (parallelizable with pipelining)
<mwk>
hm, would that actually work
<sorear>
bresenham is easy, it’s just modular addition
<sorear>
so you can use multiplication to run many steps at once
<mwk>
yeah, but the modulo part gets complicated, doesn't it
<mwk>
although I suppose you can just wing it for the big loop and fix it (in parallel) in the small ones
<sorear>
if you find a way to do this for an arbitrary algorithm, NC=P would be a huge surprise to a lot of people
<mwk>
yeah, my feeling as well
<sorear>
really, it’s addition of rationals
<ZirconiumX>
The PlayStation 2's GPU has 8 fixed-function rasterisers, and it occurred to me I didn't actually know how they could do that without a very long dependency chain from unrolling the loop
<mwk>
oh heh
<mwk>
well, there's more to rasterization than bresenham, for one
<ZirconiumX>
Sure
<sorear>
.oO clearly it doesn’t operate in parallel, if it did it’d be a vectorizer
* ZirconiumX
laughs
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<mwk>
PS2... that might be old enough to still use bresenham? idk, only ever looked at nvidia hardware, and they were already using hierarchical rasterizer + edge equations at the time