chore: prettify printing

src/instructions.rs

@@ -22,6 +22,15 @@ impl fmt::Display for Operand {
     }
 }
 
+impl fmt::LowerHex for Operand {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Byte(b) => fmt::LowerHex::fmt(b, f),
+            Self::Word(v) => fmt::LowerHex::fmt(v, f),
+        }
+    }
+}
+
 #[derive(Debug, Clone)]
 #[allow(dead_code)]
 /// A single 'line' of executable ASM is called an Instruction, which
@@ -49,7 +58,7 @@ impl fmt::Display for Instruction {
         for b in self.raw.iter() {
             write!(f, "{:02x}", b).unwrap();
         }
-        write!(f, "\t{}", self.opcode)
+        write!(f, "\t\t{}", self.opcode)
     }
 }
 
@@ -272,6 +281,7 @@ impl fmt::Display for Mnemonic {
             Self::ADD_FromReg(mem, reg) => write!(f, "add {}, {}", mem, reg),
             Self::ADD_ToReg(mem, reg) => write!(f, "add {}, {}", reg, mem),
             Self::CMP_Iv(mem, imm) => write!(f, "cmp {}, {:04x}", mem, imm),
+            Self::CMP_Ib(target, imm) => write!(f, "cmp {}, {:04x}", target, imm),
             Self::LEA(mem, reg) => write!(f, "lea {}, {}", reg, mem),
             Self::MOV_BXIv(word) => write!(f, "mov bx, {:04x}", word),
             Self::MOV_FromReg(target, reg) => write!(f, "mov {}, {}", target, reg),
@@ -311,18 +321,20 @@ impl fmt::Display for MemoryIndex {
         match &self.base {
             Some(base) => match &self.index {
                 Some(index) => match &self.displacement {
-                    Some(displacement) => write!(f, "[{} + {} + {}]", base, index, displacement),
+                    Some(displacement) => {
+                        write!(f, "[{}+{}+{:04x}]", base, index, displacement)
+                    }
                     None => write!(f, "[{}+{}]", base, index),
                 },
                 None => match &self.displacement {
-                    Some(displacement) => write!(f, "[{} + {}]", base, displacement),
-                    None => write!(f, "[{} + 0]", base),
+                    Some(displacement) => write!(f, "[{}+{:04x}]", base, displacement),
+                    None => write!(f, "[{}]", base),
                 },
             },
             None => match &self.index {
                 Some(index) => match &self.displacement {
-                    Some(displacement) => write!(f, "{} + {}", index, displacement),
-                    None => write!(f, "[{} + 0]", index),
+                    Some(displacement) => write!(f, "[{}+{:04x}]", index, displacement),
+                    None => write!(f, "[{}]", index),
                 },
                 None => panic!("Invalid MemoryIndex encountered"),
             },