Interesting. That makes sense. I've got a better method anyway, but you know what IBM says now? I just happened to run into this a few minutes ago. (From the Nov. 2012 PoOp)
Programming Note: Prior to the introduction of z/Architecture, determination of the presence of a facility was often accomplished by means of a trial execution of an instruction. If an operation exception was not recognized during the trial execution, then it could be assumed that the facility was present. Similarly, certain instructions provide a query function to determine the availability of other functions of the instruction or related instructions. However, a program might attempt to determine the availability of a particular function by trial execution of the function. With the advent of facility and function indications in z/Architecture, the technique of trial execution should be avoided - particularly if a workload may be relocated to another system in which a facility's instructions may not be present. In such an environment, STORE FACILITY LIST EXTENDED (STFLE) or an instruction's query or test function may provide a more accurate indication of facilities and functions that are available on all systems in the computing environment. Charles ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
