Brushing up on text base reading somebody elses formula node

[Pat_H]

I need to brush up on my text base skills.  I am reading somebody elses code and it contains this formula node.  Any help understanding the logic inside or seeing a LabVIEW equivelent would be much appreciated.

[altenbach]

Can you attach the actual formula node in a new VI. I doubt that we currently see the full code.

[Don_Phillips]

Very odd snippet of code.

All but the first line should be self explanitory.  Everything on the first line though are bitwise operators.

Basically it is stating that if the Nth bit of variable A is a 1 (N being j-i) then set X=2

For example: A = 11, j=6, i=3, f=8

A (in binary) is 1011.  So A right shifted 3 places (6-3) = 1 so 1 & 0x01 = 1 -- so set X = 2

Edit: fixed a typo

[Pat_H]

Here is the whole node.  Thanks

[Pat_H]

Hey Don, can you explain the &0x01 portion?

Thanks

[RavensFan]

That is masking out all the other bits and only looking at the 0th (1's) bit so you can get a simple 0 or 1, rather than other numbers in the event other bits are set within the number that you don't care about.

[altenbach]

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@Pat_H wrote:

Here is the whole node.  Thanks

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Ah, thanks. Now we see the curly brace at the end. 😄

[Darin.K]

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Pat_H wrote:

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What is up with the 'f' outside the box?

[crossrulz · Accepted solution]

How about some nice G code to look at.

[Pat_H]

Thank you all!