PH18713: ABO ARCH=12|13 OPTIMIZED MODULES MAY PRODUCE A NEGATIVE ZERO INSTEAD OF POSITIVE ZERO RESULT AFTER DECIMAL PLACE ADJUSTMENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ABO ARCH=12|13 optimized modules may produce a negative zero
  instead of positive zero result after decimal place adjustment
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of IBM Automatic Binary Optimizer      *
  *                 (ABO) for z/OS, v2.1 specifying ARCH=12 or   *
  *                 ARCH=13                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: In some rare cases compiled programs    *
  *                      containing MOVE or COMPUTE statements   *
  *                      on packed or zoned decimal data items   *
  *                      may produce a negative zero instead of  *
  *                      a positive zero result after being      *
  *                      optimized by ABO.                       *
  *                                                              *
  *                      This problem can only happen, but is    *
  *                      not guaranteed to happen, when all the  *
  *                      below are true:                         *
  *                                                              *
  *                      - the final result value is zero        *
  *                                                              *
  *                      - the receiving data item of the MOVE   *
  *                      or COMPUTE is packed or zoned decimal   *
  *                      and contains fewer declared decimal     *
  *                      places than the sending data item or    *
  *                      intermediate computation result         *
  *                                                              *
  *                      - the sending data item is a negative   *
  *                      value before the decimal places are     *
  *                      adjusted. For example, a sending value  *
  *                      of -0.00123 being moved to a target     *
  *                      data item with only two declared        *
  *                      decimal digits (PIC 9v9(2)).            *
  *                                                              *
  *                      - the ABO option ARCH=12 or ARCH=13 is  *
  *                      used                                    *
  ****************************************************************
  * RECOMMENDATION: Apply provided service                       *
  ****************************************************************
  ABO was modified to generate the expected positive zero result
  instead of a negative zero result
  

Problem conclusion

• ABO will now generate the expected positive zero result instead
  of negative zero result
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI66467 UI66468

Modules/Macros

• BOZBXITA BOZEXE1  BOZJIVP  BOZMSGE  BOZMSGK  BOZMSGT  BOZOBJ1
  BOZOPT   BOZRIDT  BOZSRC1
  

Fix information

• Fixed component name

  AUTO BINARY OPT

• Fixed component ID

  5697AB200

Applicable component levels

• R210 PSY UI66467

     UP19/11/19 P F911

• R21J PSY UI66468

     UP19/11/19 P F911

Fix is available

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