Improved style of main emulate loop w/ S

src/emulate.c

@@ -31,21 +31,23 @@ int main(int argc, char **argv) {
   state->conditionCodes = (PState){0, 1, 0, 0};
   state->pc = 0x0;
   
-  // get
+  // Fetch-decode-execute cycle
+  word wrd;
   a64inst_instruction *inst;
-  
   do {
     
-    word instruction = readWord(state, state->pc);
-    inst = decode(instruction);
+    // Step 1: Fetch instruction at PC's address
+    wrd = readWord(state, state->pc);
+
+    // Step 2: Decode instruction to internal representation
+    inst = decode(wrd);
+
+    // Step 3: Update processor state to reflect executing the instruction, and increment PC
     execute(state, inst);
-
     state->pc += 1;
-    
   } while (inst->type != a64inst_HALT);
 
   printState(state, out);
-  
   free(state->memory);
 
   return EXIT_SUCCESS;