When do the CF and OF get set during arithmetic operations?

Question

I can't find a reasonable formula for this. I know CF is used for unsigned arithmetic and OF for signed.

Please give some example arithmetic operations (like 5-7,7-5 etc.) along with the heuristic.

Answer 1

The answer to this question contains C code to emulate the ADD, ADC, SUB and SBB instructions with the carry and overflow flags and a test.

Another possibly interesting related question is here.

And you should be able to find this info in the official CPU documentation from Intel and AMD.