Etydhv

I want to make a diagram like this:

see the labelled endpoints, A, B, C, Y.

Currently my code:

documentclassarticle
usepackagecircuitikz
begindocument

begincircuitikz draw
(0,2) node[and port] (myand1) 
(0,0) node[and port] (myand2) 
(2,1) node[xnor port] (myxnor) 
(myand1.out) -- (myxnor.in 1)
(myand2.out) -- (myxnor.in 2);
endcircuitikz

enddocument

Does not label the endpoints and I don't know how to.

Also in cases like

begincircuitikz draw
(0,1) node[and port] (myand1) 
(2,0) node[xnor port] (myxnor) 
(myand1.out) -- (myxnor.in 1);
endcircuitikz

The second input to the xnor gate, I would like it to extend all the way to the left of the diagram (and then be labelled).

Just use the gate objet points to put a node with text with some desired anchor definition like this.

RESULT:

MWE:

documentclass[tikz,border=15pt]standalone
usepackagecircuitikz
begindocument
 begintikzpicture
 draw
 (0,2) node[and port] (myand1) 
 (0,0) node[and port] (myand2) 
 (2,1) node[xnor port] (myxnor) 
 (myand1.out) -- (myxnor.in 1)
 (myand2.out) -- (myxnor.in 2);
 draw (myand1.out) node[anchor=south,scale=0.5]out;
 draw (myand1.in 1) node[anchor=south,color=blue]in1;
 draw (myand1.in 2) node[anchor=south east,rotate=90,scale=0.5]in2;
 endtikzpicture

enddocument

Update:

Just use circuit tikz node "short" in a relative point:

RESULT:

MWE:

documentclass[tikz,border=15pt]standalone
usepackagecircuitikz
begindocument
 begintikzpicture
 draw
 (0,2) node[and port] (myand1) 
 (0,0) node[and port] (myand2) 
 (2,1) node[xnor port] (myxnor) 
 (myand1.out) -- (myxnor.in 1)
 (myand2.out) -- (myxnor.in 2);
 draw (myand1.out) node[anchor=south,scale=0.5]out;
 draw (myand1.in 1) node[anchor=south,color=blue]in1;
 draw (myand1.in 2) node[anchor=south east,rotate=90,scale=0.5]in2;

 %Second question

 draw[color=red]
 (myand1.in 1) % Starting point
 to [short,-*] ++ (-1,0) %++ indicates that the coordinate is relative to the starting point
 node[anchor=east]Ext input
 (myxnor.out)
 to [short,-*] ++ (2,0)
 node[anchor=west]xnor output;
 endtikzpicture

enddocument

you can see more complicated implementation and animation in my old answers about this issues. How do I simulate a logic circuit in latex?

in the circuitikz manual page 45 they do something like this (with transistors. here converted to xnor)

documentclass[border=5pt]standalone
usepackage[utf8]inputenc
usepackage[T1]fontenc
usepackagecircuitikz

begindocument
begincircuitikz
draw
(0,0) node[xnor port] (myxnor) 
(myxnor.in 1) node[anchor=east](label xnor in 1)A
(myxnor.in 2) node[anchor=east](label xnor in 1)B;
endcircuitikz
enddocument