On Wed, 8 Mar 2017 11:33:31 -0700, Paul Gilmartin wrote: >It probably save hardware to decrement as well as increment in >accessing storage. Consider that CLC goes left-to-right but >AP goes right-to-left.
AP goes right to left because it would otherwise have to do more work to propagate carry. CLC goes left to right because it can stop as soon as it finds a mismatch and recognize which is greater. If all you wanted to check for was that the two are equal, you could go either way, but that's not as useful. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
