public static boolean fastScaleUp(
      FastHiveDecimal fastDec,
      int scaleUp,
      FastHiveDecimal fastResult) {
    return
        fastScaleUp(
            fastDec.fast0, fastDec.fast1, fastDec.fast2,
            scaleUp,
            fastResult);
  }
*********************************************************************************************
  // Decimal Scale Up/Down.

  /**
Fast decimal scale down by factor of 10 with NO rounding.

The signum will be updated if the result is 0, otherwise the original sign is unchanged.

@param fast0 word 0 of the internal representation
@param fast1 word 1
@param fast2 word 2
@param scaleDown the number of integer digits to scale
@param fastResult an object to reuse
storage-api/src/java/org/apache/hadoop/hive/common/type/FastHiveDecimalImpl.java