Ryzen 2 and BMI2?

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Gian-Carlo Pascutto
Posts: 1063
Joined: Sat Dec 13, 2008 6:00 pm

Re: Ryzen 2 and BMI2?

Post by Gian-Carlo Pascutto » Wed May 16, 2018 12:35 pm

syzygy wrote:
Tue May 15, 2018 11:08 pm
Did Crafty as included in SPEC CPU2000 not use any of those on platforms where they were available? (Probably not, I guess...)
You have to ask Bob (I don't have a SPEC2000 license) but it's hard to imagine that non-Intel and non-AMD SPEC members wouldn't object to that. Using generic intrinsics like those of GCC (builtin_ffs or what's it called) doesn't work either because it needs to be compilable by pretty much every ages old proprietary compiler out there too.
Apparently SPEC CPU2017 not includes Deep Sjeng but also Leela. Nice :)
Yeah. I regret that SPEC CPU2017 allows parallelism in "speed" benchmarks though (even if only xz uses it). But it's an impossible situation given increasing core counts and how boost speeds influence these benchmarks.

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