The TRAP Instructions work fine John. You have used a product that uses them.
Chuck Arney > On Jun 20, 2019, at 7:16 AM, John McKown <john.archie.mck...@gmail.com> wrote: > > This is purely speculation, but I like what I've read about the "trap" > facility. I think it is too bad that z/OS doesn't support the use of TRAP2, > TRAP4, as well as the compare-and-trap and load-and-trap. I agree that they > are not _necessary_ since the code can do basically the same thing. The > only reason that I even bring it up is that the paper "IBM Z / LinuxONE > System Processor Optimization Primer" by C. Kevin Shum on page 51 > "Optimization - Instruction Selection (1)" recommends using > "compare-and-trap" where practical, in particular, for null-pointer > checking. > > Perhaps I should have waited for Friday to post this since it is only > wishful thinking. > > -- > Money is the root of all evil. > Evil is the root of all money. > With that in mind, money is made by the government ... > > > Maranatha! <>< > John McKown > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
