added a simple example; edited hgignore

.hgignore

@@ -52,9 +52,14 @@ build/
 *.rej
 *.orig
 
+tags
+
 syntax: regexp
 
 ^libabc.a$
 ^abc$
 
 ^arch_flags$
+
+^cmake
+^cscope

fsm.v

+module fsm (out);
+output out; 
+
+wire [2:0] ns; 
+wire [2:0] cs;
+
+always @( ns or cs )
+begin
+case (cs)
+    0 : ns = 3'b010;
+    1 : ns = 3'b001;
+    2 : ns = 3'b000;
+    3 : ns = 3'b101;
+    4 : ns = 3'b001;
+    5 : ns = 3'b111;
+    6 : ns = 3'b001;
+    7 : ns = 3'b110;
+endcase
+end
+
+assign out = cs == 3'b001; 
+
+wire [2:0] const0 = 3'h0;
+
+
+CPL_FF#3 ff3 ( .q(cs), .qbar(), .d(ns), .clk(), .arst(), .arstval(const0) );
+
+endmodule