Thanks for the clarification. That makes sense to me. The hardware is not "masking off" the "unused" bits. I totally misread the first paragraph. I also wonder if an AGR is faster than a simple AG. Unless the CPU has both 64 and 32 bit ALUs, it would make sense that the native 64 bit would be faster.
On Tue, Jan 21, 2014 at 3:40 PM, John Gilmore <jwgli...@gmail.com> wrote: > No, I was saying, I thought, something very different. To be clear, > the execution of an AMODE(64) routine using the instructions natural > to it, is in general faster than the execution of anits AMODE(31) or, > a fortiori, AMODE(24) functional equivalent. > > John Gilmore, Ashland, MA 01721 - USA > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- Wasn't there something about a PASCAL programmer knowing the value of everything and the Wirth of nothing? Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
