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+---- Thread: The CCA - Carry-Cancel Adder (/thread-5493.html)
RE: The CCA - Carry-Cancel Adder - LordDecapo - 01-28-2015
(01-27-2015, 06:08 AM)The Magical Gentleman Wrote:
decap was able to run it on his phone before iirc, I think he had to compile everything himself tho
The jar version works on anything with a mouse and keyboard and supports java for the most part.
as for my mobile version.... let's not talk about that xD my compile way didn't work fully... but I did find a relatively easy way to port it over with not many changes (since android can run java).
just been to lazy to port it... 8 really want to tho xD who knows I may start back on that.
if anyone wants to help PM me
RE: The CCA - Carry-Cancel Adder - Magic :^) - 01-30-2015
IT'S 4 TICKS!!
I made a special xor gate to save a tick, so now it's pretty fast. I also sacrificed a lot of signal strength for the output though, but I would be putting a shifter on the end etc. anyways for the alu so it shouldn't matter too much :3
So basically I made an xor that is 1 tick in one side, and 2 ticks in the other. It doesn't depend on input strenghts, but a low input strength on the 1-tick side will give a low output strength.
![[Image: wwwg5IB.png]](http://i.imgur.com/wwwg5IB.png)
The xor:
![[Image: wPExEny.png]](http://i.imgur.com/wPExEny.png)
![[Image: 11kzPyq.png]](http://i.imgur.com/11kzPyq.png)
RE: The CCA - Carry-Cancel Adder - GISED_Link - 01-30-2015
Well done !
RE: The CCA - Carry-Cancel Adder - Yap7 - 02-01-2015
Ho, so it really wasn't a CLE Adder?
Good job for making it 4 ticks, if it become the new best design for adder in cpu, I'll have a fun time saying I failed my trial by building the very first one.
RE: The CCA - Carry-Cancel Adder - Magic :^) - 02-01-2015
Your genius was just too much for them to comprehend xD
RE: The CCA - Carry-Cancel Adder - Magic :^) - 03-03-2015
UPDATE:
.. well a late update really.
me and embi made a 4 tick 4 wide CCA a good while ago, and have been messing around with it for a while. It has a signal strength problem where in some cases it only outputs 1 signal strength
However!
I have designed a 4 tick 5 wide CCA which has 4 signal strength output worst case, and has the possibility of being expanded to be able to perform 4 tick 9bit calculations?!
idek anymore xD
I'm using this design in my new dataloop for my new CPU.
The aluified design has many possibilities too, like a feasible 7 tick accumulator based dataloop.
(you could go for 6 if you wanted a headache)
no pics because i'm sleepy. You can find the newest design at ./warp cca
RE: The CCA - Carry-Cancel Adder - PNWMan - 03-27-2015
A while ago i made a derpy adder called the SCI (Section-Carry Inversion) Adder. It ended up having two carries and was an overcomplicated RCA. Imagine a derpy 2's complement device with tons of crap added on: that's what the SCI adder turned into.
RE: The CCA - Carry-Cancel Adder - LordDecapo - 03-27-2015
(03-27-2015, 06:31 PM)PNWMan Wrote: A while ago i made a derpy adder called the SCI (Section-Carry Inversion) Adder. It ended up having two carries and was an overcomplicated RCA. Imagine a derpy 2's complement device with tons of crap added on: that's what the SCI adder turned into.
WHERE HAVE YOU BEEN?! Haven't seen u online in ages. XD
RE: The CCA - Carry-Cancel Adder - Magic :^) - 03-27-2015
ooh based on carry select?
I've toyed with the idea of carry select, but no matter how I see it the time it takes to select the outputs ends up around the same speed or slower than a normal carry system.
The control signal busing is so critically timed it is pretty much useless. Once you add a repeater to your cout and point it at the mux, any performance you would have gained is already lost ;-;
RE: The CCA - Carry-Cancel Adder - CrazyGuy108 - 06-19-2015
(01-26-2015, 12:04 AM)MagicalGentleman Wrote: For the lulz I made a diagonal CCA ALU. Now might be a good time to point out that all the ALU designs I have for this are OR based.
It's 7 ticks (5+2 because inverters)... but hey, it's got good throughput
![[Image: 2tlbewN.png]](http://i.imgur.com/2tlbewN.png)
![[Image: 3vTGE66.png]](http://i.imgur.com/3vTGE66.png)
![[Image: XmiGiA9.png]](http://i.imgur.com/XmiGiA9.png)
![[Image: dTxHiq0.png]](http://i.imgur.com/dTxHiq0.png)
How do you get the OR function in a CCA ALU?