This section describes all the aspects of migrating your ESSL application programs (back and forth) between the PowerPC, POWER, POWER2, POWER3, POWER3-II, and |POWER4 processors.
The minimum amount of auxiliary storage returned by ESSL error handling may
vary among the |IBM 
pSeries and RS/6000 processors for the following subroutines: all the
Fourier transform subroutines, SCONF, SCORF, and SACORF. Therefore, to
guarantee that your application programs always migrate from any platform to
any other platform, you should use the processor independent formulas to
determine the amount of auxiliary storage to use.
Because of hardware and ESSL design differences, the results you obtain when migrating from one ESSL Library to another may not be bitwise identical. The results, however, are mathematically equivalent.