What does a system with 2 CLA units do?

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There is this system which is build out of 2 units (2 CLA units) and the question is, what does it do?

The input numbers are X and Y, which both have 4 digits (binary) each (x0, x1, x2, x3 and y0, y1, y2, y3) and x0y0 for example is an AND gate.

https://www.physicsforums.com/attachment.php?attachmentid=14817&d=1217093619"
 
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Any idea, anyone?
Is this the right forum to post this kind of question?
 
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  • Two block diagrams of 4-bit carry-lookahead adder circuits, each drawn in a dashed box with full adder FA blocks and carry-lookahead blocks, inputs x3 to x0 and y3 to y0, outputs S3 to S0 and C4, labelled stage 1 and stage 2.
    1.jpg
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asi123 said:
Any idea, anyone?
Is this the right forum to post this kind of question?

Actually, it belongs in the Homework Help forums. I'll move it there for you.

Please tell us your thoughts about what you think is going on. Why would you use a number of Full Adders like that?
 
berkeman said:
Actually, it belongs in the Homework Help forums. I'll move it there for you.

Please tell us your thoughts about what you think is going on. Why would you use a number of Full Adders like that?

10x.
What do you mean?
 
asi123 said:
10x.
What do you mean?

What do you mean, what do I mean. I'm asking you for your ideas and thoughts about what those block diagrams look like. Why would you be combining multiple Full Adders? What kind of functions would you use combinations of Full Adders for? Maybe look up Full Adder on wikipedia.org, and see what they show as applications for FAs...
 
berkeman said:
What do you mean, what do I mean. I'm asking you for your ideas and thoughts about what those block diagrams look like. Why would you be combining multiple Full Adders? What kind of functions would you use combinations of Full Adders for? Maybe look up Full Adder on wikipedia.org, and see what they show as applications for FAs...

I know what full adder does, I know what CLA system is.

The thing I don't know is, the purpose of this system.

I ran a lot of combination but still came out short, found nothing...