Question

[Siegrainn]

Hi, I have a question I'd like to ask. When I was testing the command exact_mig I found the function :

M'(M'(D,B,M(0,D',C)),M(B,A,M'(0,D',C)),M(B,A',M(0,C,B'))) that covers the minterms (0,1,6,10,13,14,15).

How should I calculate the cost ? Should I count the primitive M(0,D',C) two times or only one ?

The way I'm calculating the cost is:

7 gates, 12 input variables and 7 inverters.

For example, using another program I found the function:
M(M(M'(A,B,1),C',0),M(M(1,C,D),M(A,B,D'),0),1)

With 6 gates, 8 input variables and 3 inverters.

I would like to know if I'm calculating the cost correctly, and if in fact the second function is better than the first one. Thank you for your help.