On Sun, 16 Feb 2014 07:40:39 -0800, Charles Mills wrote: >I am by no means an expert but based on my mental model, the branch approach >is going to be slower. > It depends on the likelihood of an expensive cache fault performing an operation which has no effect.
>-----Original Message----- >From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On >Behalf Of Binyamin Dissen >Sent: Sunday, February 16, 2014 1:11 AM > >CURRENT and SUM are not adjacent (different data lines) > I long chuckled at what I considered a pointless test in: If CURRENT is not zero, then add CURRENT to SUM, thinking it a relic of instructions given to an apprentice bookkeeper working with quill pen on parchment. But modern hardware makes Binyamin's concern realistic. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
