PH24430: Unnecessary conversion to packed decimal and back to binary when moving from COMP-5 doubleword to doubleword

APAR status

• Closed as fixed if next.

Error description

• When moving from a PIC 9(18) COMP-5 (unsigned doubleword native
  binary) item to another item of the same attributes, the
  compiler generates a lengthy conversion to packed decimal and
  back to binary. While the results are correct, this holdover
  from earlier compilers is redundant for native binary and could
  be replaced by a simple direct move for better performance.
  
  This conversion process may also lead to intermediate value
  truncation taking place, which in contexts where hardware
  overflow is enabled can lead to noticeably poor performance at
  ARCH(12), due to the runtime needing to ignore the overflow per
  COBOL semantics.
  

Local fix

• Compile at ARCH(11)
  

Problem summary

• The compiler will updated to avoid generating unecessary
  conversions for moves involving COMP-5 senders and receivers
  that have a decimal precision of 0.
  

Problem conclusion

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:

  PH25371

Fix information

Applicable component levels