stari sic format ukazi v1

ass2/simulator/machine.cpp

@@ -167,11 +167,52 @@ bool Machine::execF2(int opcode, int operand) {
     return false;
 }
 
-
 bool Machine::execSICF3F4(int opcode, int ni, int operand) {
+    int x_val = 0;
+    int operand2 = fetch();
+    int UA;
+    int UV;
+    if (ni == 0) { // stari SIC (neposredno in enostavno naslavljanje)
+        if (((operand >> 7) & 0x1) == 1) { //preverimo ali je indeksno naslavljanje
+            x_val = getX();
+        }
 
+        UA = (((operand & 0x7F) << 8) | operand2) + x_val; //izracun uporabnega naslova: operand brez bita x + drugi del naslova + x_val
 
+        if (UA + 2 > MAX_ADDRESS) {
+            invalidAddressing();
+            return false;
+        }
+
+        UV = (memory[UA] << 16) | (memory[UA + 1] << 8) | memory[UA + 2]; //izracunamo operand oz. uporabno vrednost
+
+        switch (opcode) {
+            case Opcode::ADD:
+                    setA(getA() + UV);
+                    return true;
+            case Opcode::AND:
+                setA(getA() & UV);
+                return true;
+            case Opcode::COMP:
+                if (getA() < UV) {
+
+                } else {
+
+                }
+                return true;
+            default:
+                notImplemented(opcode);
+                break;
+        }
+
+    } else if (((operand >> 4) & 0x1) == 0) { // ce e bit ni prizgan e je F3, sicer F4
+
+    } else {
+
+    }
+    return false;
 }
+
 void Machine::execute() {
     int opcode = fetch();
     int operand;