Paul - be careful. All CPU's post the IBM AGS that used branch prediction are suspect. Russ Robelen (who was the 360/50 lead, worked on 360/90 and lead AGS) has the speculative executing patent. I tweaked him when it all came out and said - look at what you did.
What Russ and team are great ideas and we all have used them since they first published about it. And the fact is that it took 40 years before someone even proposed that it was an issue and could become security exploit (by some folks in German at a security conference) and it Google 18 months to reduce it to practice. ᐧ On Tue, Sep 17, 2019 at 9:55 AM Paul Koning <paulkon...@comcast.net> wrote: > "Spectre" is one of two notorious bugs of modern CPUs involving > speculative execution. I rather doubt that VAX is affected by this but I > suspect others here have a lot more knowledge. > > paul > > Begin forwarded message: > > *From: *co...@sdf.org > *Subject: **VAX + Spectre* > *Date: *September 17, 2019 at 5:32:42 AM EDT > *To: *port-...@netbsd.org > > So, this is a bug report: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86811 > > GCC would like to know if VAX needs Spectre-related work. > Are any of the VAXes ever made capable of speculative execution? the > first tech for doing it was in 1967, so not entirely far-fetched. > > > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh
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