PM91668: ISSUE WARNING ON SPKA INSTRUCTION.

Obtain the fix for this APAR.

APAR status

• Closed as unreproducible in next release.

Error description

• HLASM not warning users if they incorrectly code an operand for
  the SPKA instruction.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of HLASM for z/OS, z/VM and z/VSE  *
  ****************************************************************
  * PROBLEM DESCRIPTION: The SPKA instruction operand is often   *
  *                      incorrectly specified resulting in a    *
  *                      change to an incorrect Program Status   *
  *                      Word (PSW) key.                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The SPKA instruction operand is often incorrectly specified
  since only bits 56-59 of the generated operand value are used
  to change the PSW key by the instruction.  For example,
  assembling the instruction SPKA 8 results in bits 56-59 being
  set to 0 (and so a switch to PSW key 0 will be made) rather
  than the intended switch to PSW key 8 written as SPKA X'80'.
  

Problem conclusion

Temporary fix

Comments

• Problem conclusion:
  HLASM has been modified to issue a new warning message when
  the SPKA instruction is used under the following
  circumstances:
  (i)  ASMA221W SPKA specifies a non-zero base register and a
  displacement value.
  (ii) ASMA222W SPKA operand contains bits ignored by the
  instruction.  Key n will be used.
  
  Note that these messages can be suppressed by using the
  SUPRWARN option.
  
  The High Level Assembler for z/OS & z/VM & z/VSE Programmer's
  Guide Version 1 Release 6 (SC26-4941-06) will be updated as
  follows:
  
   --- START OF DOC UPDATES ---
  Publication Number: SC26-4941-06  Title: Programmer's Guide
  ===========================================================
  is required to be updated:
  
  Appendix F. High Level Assembler Messages
  Assembly error diagnostic messages
  Add new message:
  
  ASMA221W  SPKA operand specifies a non-zero base register and a
  displacement value.
  
  Explanation:  The SPKA operand specifies a non-zero register
  and displacement value.  The value of bits 56-59 of the
  generated operand value can only be determined at runtime.
  HLASM cannot determine which value will be used by the
  instruction.
  
  System action:  The assembly continues.
  
  Programmer Response:  Check that the instruction operand base
  register and displacement values have been specified correctly.
  This message can be suppressed using the SUPRWARN option.
  
  Severity: 4
  
  
  Add new message:
  
  ASMA222W  SPKA operand contains bits ignored by the
  instruction.  Key n will be used.
  
  Explanation:  The SPKA instruction specifies an operand which
  includes bits other than bit positions 56-59 of the generated
  operand value.  The PSW key as specified by bit positions 56-59
  will be set to the value n.
  
  System action:  The assembly continues.
  
  Programmer Response:  Ensure that the SPKA instruction operand
  has been correctly specified to only set bits 56-59 of the
  generated operand value.  This message can be suppressed using
  the SUPRWAN option.
  
  Severity: 4
   --- END OF DOC UPDATES ---
  

APAR Information

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

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

  UI11675 UI11676 UI11677

Modules/Macros

• ASMADOPD ASMAINFO ASMA00   ASMA01   ASMA02   ASMA03   ASMA04
  ASMA1A   ASMA1B   ASMA1F   ASMA1G   ASMA1I   ASMA1J   ASMA1K
  ASMA1L   ASMA1M   ASMA1N   ASMA1P   ASMA1Q   ASMA1R   ASMA1S
  ASMA1T   ASMA1U   ASMA1V   ASMA1W   ASMA1X   ASMA1Y   ASMA1Z
  ASMA10   ASMA11   ASMA12   ASMA13   ASMA15   ASMA16   ASMA17
  ASMA2B   ASMA2D   ASMA2F   ASMA2G   ASMA2I   ASMA2V   ASMA20
  ASMA21   ASMA22   ASMA23   ASMA25   ASMA26   ASMA40   ASMA5UNI
  ASMA7DE  ASMA7EN  ASMA7ES  ASMA7JP  ASMA7UE  ASMA80   ASMA9D
  ASMA9Z   ASMA90   ASMA91   ASMA92   ASMA93
  

Fix information

• Fixed component name

  HLASM MVS, VM &

• Fixed component ID

  569623400

Applicable component levels

• R160 PSY UI11676

     UP13/11/01 P F310

• R360 PSY UI11675

     UP13/10/31 I 1000

• R689 PSY UI11677

     UP13/10/31 P E520

Fix is available

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