The question you really want to ask is "how should I determine if the task under which I am running has used already used vector instructions"?
The answer is to look at PSAVSS or STCBVSS (which are classified as Programming Interfaces). Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY "IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> wrote on 10/31/2019 01:30:13 PM: > From: "Ngan, Robert" <rn...@dxc.com> > To: ASSEMBLER-LIST@LISTSERV.UGA.EDU > Date: 11/01/2019 11:36 AM > Subject: Vector enablement control? > Sent by: "IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> > > With the new COBOL compilers capable of generating vector > instructions for handling packed fields, I'm looking at modifying > our ESTAE routines to dump the contents of the vector registers. > The PoOPs says you should not issue a vector instruction unless both > the vector enablement control and AFP-register control bits in CR0 are on. > If you're running z/OS on a z13 of higher (i.e. your machine a > vector instruction support), would either of these two bits ever be off? > > From a standard ESTAE routine, I can examine the CR0 contents from > the SDWA, but in a CICS ABEND exit, I don't have access to CR0. > > Robert Ngan > HCL Technologies
