PH64239: ARITH(COMPAT): NEGATIVE INTEGER EXPONENTS IN FLOATING POINT COMPUTATIONS HAVE SLIGHTLY DIFFERENT RESULTS WITH COBOL 4.2 VS 6

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• ARITH(COMPAT): Negative integer exponents in floating point
  computations have slightly different results with COBOL 4.2 vs
  6.
  

Local fix

• Compile using ARITH(EXTEND)
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users compiling and running programs with    *
  *                 the Enterprise COBOL 6.3 compiler with the   *
  *                 ARITH(COMPAT) compiler option in effect      *
  *                 whose programs include COMPUTE statements    *
  *                 with a floating point exponentiation         *
  *                 involving a numeric literal base and numeric *
  *                 literal exponent.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: In some cases users encounter different *
  *                      least significant digits in the         *
  *                      floating point result compared to       *
  *                      programs compiled with COBOL 4.2.       *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  A problem has been identified where the result of a floating
  point exponentiation computation involving a numeric literal
  base and numeric literal exponent can result in differing least
  significant digits when the ARITH(COMPAT) compiler option is in
  effect.
  

Problem conclusion

• The compiler has been fixed to address the identified issue.
  

Temporary fix

Comments

APAR Information

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

  PH62042

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

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 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 IGYZQEN6 IGYZQENU IGYZQJP6 IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R630 PSY UI99158

     UP24/12/03 P F412

• R631 PSY UI99159

     UP24/12/03 P F412

• R632 PSY UI99160

     UP24/12/03 P F412

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.