On Tue, 2004-11-30 at 12:05 -0500, William M. Quarles wrote: > performance difference. Now were you saying that this cmov is part of > i486 or i686? i686 > Would I have to worry about any trademark problems? ????? > Is there a script that Red Hat uses to automate the build process? Does > it use SRPMS or do the sources and specs have to be "preinstalled?" srpms; what you can do yourself is install most of the rpms (so that all buildrequires are met), then get the src.rpm's in one dir and do for i in *.src.rpm ; do rpmbuild --rebuild --target i686 $i ; done for a first cut approximation... takes 24 to 36 hours though. > > However, newer ones (both AMD and Intel) operate in such a way that the > > advantage of this no longer is an advantage, they need to know the > > result anyway in effect (and also make a guess about the "if" result) > > Is the advantage still there not anymore > , or is it just no longer a significant > advantage? Or is it a cost? Unless it's a cost, I don't see what's on newest P4 cores it seems to be a cost even (given that cmov can't do all the addressing combinations normal mov can, gcc may have to add some slight additional glue code which is a cost) > wrong with putting in the advantage, unless it's a lot more work on your > part. Is it more work? it means that you don't run on cpus without cmov...
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