immediate operand
                    THEN (* Release parameters from called procedure’s stack *)
                         IF StackAddressSize = 32
                              THEN
                                    ESP ← ESP + SRC;
                              ELSE (* StackAddressSize = 16 *)
                                    SP ← SP + SRC;
                         FI;
              FI;
              tempESP ← Pop();
              tempSS ← Pop(); (* 32-bit pop, high-order 16 bits discarded;