Update doc about new API

README.md

@@ -575,6 +575,8 @@ then the following transformation are applied:
 * API\_3: method(oplist, &output, ...) /* Pass by address the first argument (like with M\_IPTR) and give the oplist of the type */
 * API\_4 : output = method(...) /* Pass by return value the first argument */
 * API\_5:  output = method(oplist, ...) /* Pass by return value the first argument and give the oplist of the type*/
+* API\_6 : method(&output, &...) /* Pass by address the two first arguments */
+* API\_7:  method(oplist, &output, &...) /* Pass by address the two first argument and give the oplist of the type*/
 
 Example: