PH40876: COMPUTE STATEMENTS WITH PACKED-DECIMAL OR USAGE DISPLAY SENDERS AND RECEIVERS MAY IMPACT PERFORMANCE AT ARCH(10|11) AND OPT(1|2)

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The compiler may choose to convert PACKED-DECIMAL and USAGE
  DISPLAY arithmetic to a floating point format called decimal
  floating point (DFP). This is done at ARCH(10|11) and OPT(1|2)
  so that the compiled application may perform better.
  A prior PTF fixed an issue where the optimization that generated
  DFP
  instructions would sometimes cause instructions to have an
  incorrect line number. When fixing that, the fix incorrectly
  caused the compiler to stop generating some conversions to DFP
  that were previously generated.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL compiling programs *
  *                 at ARCH(10|11) and OPT(1|2) that contain     *
  *                 COMPUTE statements with PACKED-DECIMAL or    *
  *                 USAGE DISPLAY senders and receivers.         *
  ****************************************************************
  * PROBLEM DESCRIPTION: Performance may be worse than in prior  *
  *                      PTFs                                    *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF                       *
  ****************************************************************
  The compiler may choose to convert PACKED-DECIMAL and USAGE
  DISPLAY arithmetic to a floating point format called decimal
  floating point (DFP). This is done at ARCH(10|11) and OPT(1|2)
  so that the compiled application may perform better. A prior
  PTF
  fixed an issue where the optimization that generated DFP
  instructions would sometimes cause instructions to have an
  incorrect line number. When fixing that, the fix incorrectly
  caused the compiler to stop generating some conversions to DFP
  that were previously generated.
  

Problem conclusion

• The compiler was fixed to generate DFP in the cases where prior
  PTFs generated DFP while still ensuring that instructions were
  generated with the correct line number.
  

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:

  PH41474

Modules/Macros

• IGY8RWTU IGYCASMB IGYCCBE  IGYCCCRT IGYCCICS IGYCCSRV IGYCDGEN
  IGYCDIAG IGYCDMAP IGYCEN$0 IGYCEN$1 IGYCEN$2 IGYCEN$3 IGYCEN$4
  IGYCEN$5 IGYCEN$8 IGYCEN$D IGYCEN$R IGYCFGEN IGYCFREE IGYCINIT
  IGYCJA$0 IGYCJA$1 IGYCJA$2 IGYCJA$3 IGYCJA$4 IGYCJA$5 IGYCJA$8
  IGYCJA$D IGYCJA$R IGYCLIBR IGYCLSTR IGYCLVL0 IGYCLVL1 IGYCLVL2
  IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOB2E IGYCOPI  IGYCOPT  IGYCOSCN
  IGYCPGEN IGYCRCTL IGYCRDPR IGYCRDSC IGYCREAL IGYCRWT  IGYCSCAN
  IGYCSIMD IGYCUE$0 IGYCUE$1 IGYCUE$2 IGYCUE$3 IGYCUE$4 IGYCUE$5
  IGYCUE$8 IGYCUE$D IGYCUE$R IGYCXREF IGYDRV   IGYEQCWI IGYMSGE
  IGYMSGK  IGYMSGT  IGYQCBE  IGYQSPLT IGYSIDE2 IGYZQEN6 IGYZQENU
  IGYZQJP6 IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R630 PSY UI77327

     UP21/10/01 P F109 {

• R631 PSY UI77328

     UP21/10/01 P F109 {

• R632 PSY UI77329

     UP21/10/01 P F109 {

• R63H PSY UI77330

     UP21/10/01 P F109 {

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.