> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Tom Marchant > Sent: Thursday, June 29, 2006 1:09 PM > To: [email protected] > Subject: Re: Using different storage key's > > > On Thu, 29 Jun 2006 09:32:50 -0400, Craddock, Chris > <[EMAIL PROTECTED]> > wrote: > > > >On z machines there is only one move instruction in hardware > (MVC) and > >all of the other variants are implemented in milicode. So for a given > >amount of data and a particular set of environmental state > (alignment, > >key etc) they are all going to take just as long as they > need to and it > >will always be longer than MVC. > > > Really? Is that documented anywhere public? I'm a little > surprised to > hear that MVCL, MVN, MVN, MVO and others are implemented in millicode. > > Tom Marchant
I know that it has been said that MVCL and MVCLE, except in the case of moving complete 4K pages (frames) (implemented via "Move Page") is basically an MVC in a loop. I doubt that MVZ, MVN, and MVO are implemented with MVC in millicode. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- 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
