On Tue, May 15, 2018 at 4:17 PM, Paul Edwards <mutazi...@gmail.com> wrote:
> A GETMAIN LOC=64 for 64-bit programs would be good. > I see absolutely no need for this. It would most likely just invoke the current IARV64 code, in a "crippled" mode (i.e. IBM decides things that the real IARV64 allows the programmer to choose at present). The programmer would either deliberately dual path the code for the LOC=64 needs, or use a macro which would do the dual path for them. > > > How are you planning to justify all this work to IBM? > > How much additional money in terms of hardware > > purchases or software purchases will the writers of > > AM(32) modules be spending with IBM, to justify all > > the development and testing resources that your > > growing list of changes will require? > > It's not AM32, it's AM-infinity, and it's the gold > standard of computing as far as I can tell. People > should migrate to z/Arch instead of x64 because > x64 is likely to be saddled by needing special > modes for 32 and 64 that don't exist on a pure > 64-bit z/Arch. > > And there's no downside. 32-bit programs get > access to a full 32-bit virtual memory, and > 64-bit programs get access to a full 64-bit > virtual memory. > I really think you would be impressed by the IBMi. The hardware is a slightly modified Power8 processor. The IBMi has 128 bit addressing right now. And there are no "lines" or "bars" in that anywhere. When I looked at it a few years ago, it was restricted to only actually using 48 of the 128 bits. But it has already planned for the future. I cannot see anyone, ever, being able to actually use an entire 128 bit address because there aren't that many atoms in our current universe. 2^128-1 = 3.4E+38. So it's impossible to build the hardware. > > BFN. Paul. > > -- We all have skeletons in our closet. Mine are so old, they have osteoporosis. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
