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PI67361: INVALID UNKWN OPCODE GENERATED WITH RTCHECK

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APAR status

  • Closed as program error.

Error description

  • An instruction called 'UNKWN' is generated in the compiler
ASM listing output when using the RTCHECK option with
OPTimization enabled.

The instruction might look like:


000178  EBA4  0003  00DF  000027 |         SLLK    r10,r4,3
00017E  1E78              000027 |         ALR     r7,r8
000180  B9FA  A087        000027 |         ALRK    r8,r7,r10
000184  B9F3              000027 |     **  UNKWN   r15,r3
000186  A086              000027 |     **  UNKWN   r8,r6

Local fix

  • Disable the RTCHECK option with NORTCHECK.

Problem summary

  • ****************************************************************
* USERS AFFECTED: XLC users using qrtcheck=all.                *
****************************************************************
* PROBLEM DESCRIPTION: Incorrect logic when generating         *
*                      assm instructions for rtcheck           *
*                      specific instructions, resulting in     *
*                      UNKWN opcode being generated.           *
****************************************************************
* RECOMMENDATION: Apply the provided PTF.                      *
*                                                              *
****************************************************************
.

Problem conclusion

  • Apply provided fix.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PI67361
    • 

  • Reported component name
    C/C++ FOR MVS
    • 

  • Reported component ID
    56551210A
    • 

  • Reported release
    791
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2016-08-10
    • 

  • Closed date
    2016-09-06
    • 

  • Last modified date
    2016-10-03
    • 





    

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

    
PI60294
    

    • 

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

    • 



Modules/Macros


    

  •    CCNETBY

    



Fix information


    

  • Fixed component name
    C/C++ FOR MVS
    • 

  • Fixed component ID
    56551210A
    • 



Applicable component levels


    

  • R791  PSY  UI40666
       UP16/09/22  P  F609
    • 



Fix is available


    

  • Select the PTF appropriate for your component level.
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Document Information


            

            


                        

            Modified date:
            

            09 August 2024
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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