Added CommandDecoder for CLRF, CRLW, COMF, DECF

CommandDecoder.java

@@ -7,6 +7,18 @@ public class CommandDecoder
             //ADDWF();
         } else if ((binaryInput & 0x3F00) == 0x500) {
             //ANDWF();
+        } else if ((binaryInput & 0x7F00) == 0x3)
+        {
+            //CLRF();
+        } else if ((binaryInput & 0x7F00) == 0x2)
+        {
+            //CLRW();
+        } else if ((binaryInput & 0x3F00) == 0x900)
+        {
+            //COMF();
+        } else if ((binaryInput & 0x3F00) == 0x300)
+        {
+            //DECF();
         }
     }
 }