ft: abstract and implement ADD::* interpretation

src/instructions.rs

@@ -45,7 +45,7 @@ impl fmt::Display for Instruction {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Copy)]
 #[allow(non_camel_case_types)]
 /// All possible mnemonic variantions.
 /// These are sorted by type and are not in hex-encoding order.