LI77617: DISASSEMBLER DOES NOT SHOW BPERMD INSTRUCTION

XL C/C++ for Linux Fix Pack 8 (October 2015 Update) for 12.1
XL C/C++ for Linux Fix Pack 4 (October 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 5 (December 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 6 (February 2014 Update) for 12.1
XL C/C++ for Linux Fix Pack 7 (May 2014 Update) for 12.1

APAR status

• Closed as program error.

Error description

• he disassembler is failing to show the bpermd mnemonic
  instruction in the disassembled output; whereas the -S output
  shows it.
  
  ===== COMPILE COMMAND:
  1) Compile with:
   xlC -qarch=pwr7 -c -O2 test.cpp -q64
  
  2) Disassemble with:
  /usr/vac/exe/dis test.o
  
  ===== TESTCASE:
  $ cat test.cpp
  #include <builtins.h>
  
  unsigned long long bperm(unsigned long long a, unsigned long
  long b)
  {
     return __bpermd(a,b);
  }
  $
  
  
  ===== ACTUAL OUTPUT:
  Output contains:
  .bperm__FULT1:                          # 0x0000000000000000
  (H.4.
  NO_SYMBOL)
          .long   0x7c6321f8              # "|c!\370"
          .long   0x4e800020              # "N\200\0 "
  
  Output should show bpermd mnemonic
  
  
  
  ===== EXPECTED OUTPUT:
  Output should show bpermd mnemonic instruction as seen in the -S
  output.
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Users who use the disassembler to dump the mnemonic
  instructions without specified arch mode are affected by this
  issue.
  
  PROBLEM DESCRIPTION:
  The disassembler is failing to decode some mnemonic
  instructions such as bpermd when the arch mode is not
  specified.
  

Problem conclusion

• The compiler has been modified to account for the missing arch
  mode and provide the correct disassembled output.
  

Temporary fix

Comments

APAR Information

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

  IV46292

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

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5725C7300

Applicable component levels

• RC10 PSN IV46292

     UP06/09/13