Fixed a bug in the parser not setting an identifier when one is used with a CMP and fixed a bug in the example assembly program.

src/parser.c

@@ -167,7 +167,7 @@ void HandleOpcode(void) {
                         opcode->Value.Mnemonic = isByte ? COPYAB : COPYA;
                         opcode->Lemexe = isByte ? "copyab" : "copya";
 
-                        AdvanceParser();
+                        ExpectIdentifier(0, ForwardParser);
                     }
                     else {
                         ExpectPuncuation(LBracket, ForwardParser);
@@ -208,12 +208,18 @@ void HandleOpcode(void) {
 
                 TokenClass class = PeekToken()->Class;
 
-                if (class == NumberClass || class & IdentifierClass) {
+                if (class == NumberClass) {
                     opcode->Value.Mnemonic = CMPI;
                     opcode->Lemexe = "CMPI";
 
                     AdvanceParser();
                 }
+                else if (class & IdentifierClass) {
+                    opcode->Value.Mnemonic = CMPI;
+                    opcode->Lemexe = "CMPI";
+
+                    ExpectIdentifier(0, ForwardParser);
+                }
                 else {
                     ExpectRegister();
                 }