Add the files and decode logic for RVA

src/instructions.rs

@@ -7,6 +7,7 @@
 #[macro_use]
 mod macros;
 
+mod rva;
 mod rvi;
 mod rvm;
 
@@ -166,6 +167,7 @@ pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Result<(), E
                 Ok(())
             }
         },
+        0b01011 => rva::find_and_exec(instr, core),
         _ => illegal(instr),
     }
 }