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
