some random things

project0.2/PU.v

@@ -0,0 +1,32 @@
+module PU (
+    input A,        // Dividend bit
+    input B,        // Divisor bit
+    input Cin,      // Carry input
+    input S,        // Select input for the mux
+    output Y,       // Output of the PU
+    output COut     // Carry output from the full adder
+);
+
+wire Sum, notB;
+
+// Invert B for subtraction
+not n1 (notB, B);
+
+// Full adder performs A - B + Cin
+fulladder f1 (
+    .A(A),
+    .B(notB),
+    .Carry(Cin),
+    .Sum(Sum),
+    .CarryO(COut)
+);
+
+// 2:1 multiplexer to select between A and Sum
+mux2 m1 (
+    .A0(A),        // Input 0 of mux
+    .A1(Sum),      // Input 1 of mux
+    .S(S),         // Select line
+    .Y(Y)          // Output of the mux
+);
+
+endmodule