public void update64(int v0, int v1) {
    this.negative = (v1 < 0);
    this.mag.update(v0, v1 & SqlMathUtil.FULLBITS_31, 0, 0);
  }
Update this object with the given integers, receiving only 64 bits data.

@param v0
         v0
@param v1
         v1
common/src/java/org/apache/hadoop/hive/common/type/SignedInt128.java