do-core1: do-core: Add opcode and operand getters

Signed-off-by: Samuel Ortiz <[email protected]>

do-core/src/instruction.rs

@@ -50,4 +50,16 @@ impl Instruction {
 
         Ok(Instruction { opcode, op0, op1 })
     }
+
+    pub fn opcode(&self) -> OpCode {
+        self.opcode.clone()
+    }
+
+    pub fn op0(&self) -> u8 {
+        self.op0
+    }
+
+    pub fn op1(&self) -> u8 {
+        self.op1
+    }
 }

src/main.rs

@@ -43,14 +43,13 @@ fn main() -> Result<(), Error> {
         "do-core-1: instruction decoded into {:?}",
         decoded_instruction
     );
-    let op0 = decoded_instruction.op0 as usize;
-    let op1 = decoded_instruction.op1 as usize;
+    let op0 = decoded_instruction.op0() as usize;
+    let op1 = decoded_instruction.op1() as usize;
 
-    match decoded_instruction.opcode {
+    match decoded_instruction.opcode() {
         OpCode::ADD => registers[op0] = add(registers[op0], registers[op1])?,
         OpCode::XOR => registers[op0] = xor(registers[op0], registers[op1]),
-
-        _ => panic!("Unknown opcode {:?}", decoded_instruction.opcode),
+        _ => panic!("Unknown opcode {:?}", decoded_instruction.opcode()),
     }
 
     dump_cpu_state("Final CPU state", &registers);