cost += 1;
return prefix + 1;
  private static int operandCost(OPT_Operand op, boolean shortFormImmediate) {    if (op instanceof OPT_MemoryOperand) {      int cost = 1; // might need SIB byte      OPT_MemoryOperand mop = (OPT_MemoryOperand)op;      if (!mop.disp.isZero()) {        if (fits(mop.disp,8)) {          cost += 1;        } else {          cost += 4;        }      }      return cost;    } else if (op instanceof OPT_IntConstantOperand) {      if (shortFormImmediate && fits(((OPT_IntConstantOperand)op).value,8)) {        return 1;      } else {        return 4;      }    } else {      return 0;    }  }