IV77660: __FMADD BUILT-IN NO LONGER ACCEPTED BY -QARCH=PWR4

IBM XL C/C++ for AIX 13.1.3

APAR status

• Closed as fixed if next.

Error description

• The floating multiply-add built-in __fmadd is no longer accepted
  with the XL C/C++ compiler at -qarch=pwr4.
  
  
     === TEST CASE ===
  
  #include <builtins.h>
  
  double test()
  {
     return __fmadd(0, 0, 0);
  }
  
  
  $ xlC -c -qarch=pwr4 test.C
  "test.C", line 5.18: 1540-2878 (S) The built-in function
  "__fmadd" is not valid for this architecture.
  $
  

Local fix

• Use higher -qarch level
  

Problem summary

• PROBLEM DESCRIPTION:
  For POWER4 architecture level the compiler will not recognize
  floating point built-in functions, resulting in a 1540-2878
  error.
  
  USERS AFFECTED:
  Users of floating point built-in functions like fmadd and fmsub
  using -qarch=pwr4 arch level.
  
  WORKAROUND/CIRCUMVENTION:
  Avoid calling affected built-in functions or increase arch
  level.
  
  CONCLUSION:
  The following built-in functions were affected and will be
  corrected: fmadd, fmadds, fmsub, fmsubs.
  

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:

Fix information

Applicable component levels

• RD12 PSN

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