chore: add nice debug output

src/operands.rs

@@ -13,6 +13,9 @@ pub type DWord = u32;
 #[derive(Debug, Clone)]
 #[allow(dead_code)]
 /// Encodes either Byte- or Word-sized operands.
+/// Also sometimes used to decide if an instruction is Byte- or Word-sized,
+/// which is usually indicated by using a value of 0 and the disregarding
+/// the value when read.
 pub enum Operand {
     Byte(Byte),
     Word(Word),
@@ -37,7 +40,7 @@ impl fmt::LowerHex for Operand {
 }
 
 #[derive(Debug, Clone)]
-/// ModRM byte can either target a memory location or some register
+/// ModRM byte can either target a memory location or some register.
 pub enum ModRmTarget {
     Memory(MemoryIndex),
     Register(Register),
@@ -53,11 +56,11 @@ impl std::fmt::Display for ModRmTarget {
 }
 
 #[derive(Debug, Clone)]
-/// Memory displacements are signed versions of u8 and u16.
+/// Memory displacements are signed versions of Byte and Word operands.
 /// Encodes either Byte- or Word-sized operands.
 pub enum Displacement {
-    IByte(i8),
-    IWord(i16),
+    IByte(IByte),
+    IWord(IWord),
 }
 
 impl fmt::LowerHex for Displacement {