Added getter for signed values

register.py

@@ -27,6 +27,12 @@ class Register:
     def get(self):
         return self.value
 
+    def get_signed(self):
+        if self.value & (1 << (self.n_bits - 1)) == 0:
+            return self.value
+        else:
+            return self.value - (1 << self.n_bits)
+
     def complement(self):
         self.value = self.value ^ ((1 << self.n_bits) - 1)