On Tue, Jul 23, 2019 at 11:05:59AM +0200, Kevin Kofler wrote: > assume. And if you ask me, we should just stick to SSE2 as the baseline. Ie the status quo. > What are the big gains to be had from SSE3, SSSE3, SSE4.1, and SSE4.2? Each of those individually, and from a general system library persepective, I'd wager not a whole lot. But in aggregate, there are a lot of Clear Linux benchmarks showing a sizeable bump in general purpose performance. That said -- A reasonable argument can be made to bump the baseline to require SSE3, because all non-AMD x86_64 CPUs support it, and on the AMD side, anything beyond their 1st-gen single-core K8s supports it. (We're talking April 2005 here, versus the September 2003 introduction of the very first x86_64 processor) As another data point, Windows 8.x effectively required SSE3 on 64-bit CPUs as the other CPU features they required (LAHF/SAHF, CMPXCHG16B, and NX) were only implemented together on SSE3-capable processors. (And Steam's hardware survey shows that a full 100% of their users have an SSE3-capable processor..) - Solomon -- Solomon Peachy pizza at shaftnet dot org High Springs, FL ^^ (email/xmpp) ^^ Quidquid latine dictum sit, altum videtur.
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