16-bit increment

Makefile

@@ -1,6 +1,15 @@
 clean:
 	-rm *.vcd *.vvp
 
+inc16_tb: inc16_tb.vcd
+	gtkwave inc16_tb.vcd &
+
+inc16_tb.vcd: inc16_tb.vvp
+	vvp inc16_tb.vvp
+
+inc16_tb.vvp: inc16.v inc16_tb.v
+	iverilog -o inc16_tb.vvp inc16_tb.v
+
 add16_tb: add16_tb.vcd
 	gtkwave add16_tb.vcd &
 

inc16.v

@@ -0,0 +1,21 @@
+`ifndef _inc16_v
+`define _inc16_v
+
+`include "halfadder.v"
+
+module Inc16 (input [15:0] in, output [15:0] out);
+    wire [16:1] c;
+
+    genvar i;
+    generate
+        for (i=0; i<16; i=i+1)
+        begin
+            if (i==0)
+                HalfAdder u1 (.a(in[i]), .b(1'b1), .sum(out[i]), .carry(c[i+1]));
+            else
+                HalfAdder u1 (.a(in[i]), .b(c[i]), .sum(out[i]), .carry(c[i+1]));
+        end
+    endgenerate
+endmodule
+
+`endif

inc16_tb.v

@@ -0,0 +1,20 @@
+`include "inc16.v"
+
+module Inc16_test;
+    reg [15:0] in;
+    wire [15:0] out;
+
+    integer i;
+
+    initial begin
+        $dumpfile("inc16_tb.vcd");
+        $dumpvars;
+        in=123;
+        #1;
+        in=16'h7F;
+        #1;
+        $finish();
+    end
+
+    Inc16 u1(.in(in), .out(out));
+endmodule