public static long combineInts(int lo, int hi) {
    return ((hi & LONG_MASK) << 32L) | (lo & LONG_MASK);
  }
@param lo
         low 32bit
@param hi
         high 32bit
@return long value that combines the two integers
common/src/java/org/apache/hadoop/hive/common/type/SqlMathUtil.java