diff --git a/src/execute.c b/src/execute.c
index d0c2c5e..6622812 100644
--- a/src/execute.c
+++ b/src/execute.c
@@ -3,20 +3,25 @@
 void execute(Machine *state, a64inst_instruction *inst) {
 
     switch (inst->type) {
+
+        // Halt the program
         case a64inst_HALT:
-            // Halt the program
             break;
+
+        // Execute a data processing immediate instruction
         case a64inst_DPIMMEDIATE:
-            // Execute a data processing immediate instruction
             break;
+
+        // Execute a branch instruction
         case a64inst_BRANCH:
-            // Execute a branch instruction
             break;
+
+        // Execute a data processing register instruction
         case a64inst_DPREGISTER:
-            // Execute a data processing register instruction
             break;
+
+        // Unknown instruction
         default:
-            // Unknown instruction
             break;
     }