README changed

README

@@ -1 +1,30 @@
-./gp -n 20 -t 50000000 -i 10 -H 30
+This project is a little toy  in genetic programming. Basically we built a system that uses genetic programming to synthesize code into a tiny virtual machine. 
+
+To play you need of:
+-> gcc
+
+Building
+
+In the src directory, execute the command:
+    $ make
+
+Testing
+
+Run without changes, the gp program try synthesize a program that does the multiplication of two integers. Note that the virtual machine has no instruction of multiplication. Use this command for see the program in action:
+
+  $./gp -n 20 -t 50000000 -i 10 -H 30
+
+
+Instructions of Virtual Machine
+
+MOVE   x y   - put the value of y in x
+MOVI   x num - put the value num in x
+ADD    x y   - adds the value of y at x
+SUBI   x num - decreases the value num at x
+JUMPZ  x pc  - if x value is zero, jump to instruction in position pc
+JUMP   pc    - jump to instruction in position  pc
+RET          - stop the program
+
+
+Trumae <trumae@gmail.com>
+