On Wed, 30 May 2007 10:39:48 -0700 Edward Jaffe <[EMAIL PROTECTED]> wrote:
:>Binyamin Dissen wrote: :>> :>In my experience, excessive switching of addressing mode is quite :>> :>expensive. I suspect it's because the entire pipeline must be flushed. :>> I didn't see that in the POPs. :>AFAIK, the Principles of Operation does not discuss processor pipeline :>considerations for any instruction. There is some cursory information :>here and there regarding instruction prefetch. That's about it. Why would an AMODE change require a pipline flush? It doesn't branch anywhere. The current pipline should be valid. -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
