PM27870: AFTER MIGRATING TO CICSTS R4.1, PROGRAMS THAT USE FLOATING POINT INSTRUCTIONS AND COMPILED WITH THE IEEE OPTION MAY ABEND0C7.

APAR status

• Closed as fixed if next.

Error description

• After migrating to CICS / TS R4.1, applications that perform
  floating point arithmetic and compiled with the IEEE option may
  abend with a 0C7 ( IEEE invalid operation ).  The Floating Point
  Control Register ( FPCR ) contains x'F0000000' indicating that
  the invalid operation, division by zero, overflow, and underflow
  masks are on.  If these are set, then the application is
  vulnerable to these errors.  These mask bit's were set in the
  FPCR when control was in another environment (that needed them
  set), but now are being carried across to new transactions.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: A CICS region encountered an 0C7 abend, *
  *                      and issued message                      *
  *                      DFHAP0001 applid An abend (code         *
  *                      0C7/AKEA) has occurred.                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A task ran and updated the Floating Point Control Register.
  The new value was preserved in the register and passed on to
  the next task to run. The residual data in the Floating Point
  Control Register led to an 0C7 data exception in the new task.
  
  Additional Keywords: abend0C7 S0C7 AP0001 msgDFHAP0001
                       abendS0C7
  

Problem conclusion

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

• This APAR is being closed FIN with concurrence from the
  submitting customer.  This means that a fix to this APAR is
  expected to be delivered from IBM in a release which is being
  developed at the time that the APAR was closed.
  The latest release of the product to exit development at the
  time this APAR was closed was:
    CICS Transaction Server for z/OS V4.1.
  PEG27201  PEG 27201
  

APAR Information

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

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

Fix information

Applicable component levels

• R600 PSN

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