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AMD's RISC CPU
- chasil 3y agoIt was closely related to SPARC. "The 29k evolved from the same Berkeley RISC design that also led to the Sun SPARC..." https://en.m.wikipedia.org/wiki/AMD_Am29000 https://en.m.wikipedia.org/wiki/AMD_Am29000 EDIT: As far as I know, it was also underneath the K5. "The K5 was based upon an internal highly parallel RISC processor architecture with an x86 decoding front-end." https://en.wikipedia.org/wiki/AMD_K5 https://en.wikipedia.org/wiki/AMD_K5 This was before the NexGen acquisition, so the 29k would have been the obvious RISC. "AMD purchased NexGen when AMD's K5 chip failed to meet performance and sales expectations." https://en.wikipedia.org/wiki/NexGen https://en.wikipedia.org/wiki/NexGen
- sylware 3y agoSoon risc-v cores? But since AMD does lock with PI x86_64 ISA, unless others start to produce extremely performant RISC-V cores on the latest silicon process, this is unlikely to happen. :(
- Octoth0rpe 3y agoThe video is about a RISC (as in the category of ISA, not an implementation thereof such as RISC-V) core that AMD used internally well over 20 years ago, not a currently in dev RISC-V core (as in an implementation of RISC, and not the category of ISA).
- sylware 3y agoThis is so much missing out the purpose of comment... chatgpt?
- Octoth0rpe 3y agoReferring to my reply? Absolutely not.
- sylware 3y agotypical answer from chatgpt... that thing has a too big context window.
- omgJustTest 3y agoIMO CPUs are dead for all devices not laptops, in 5 years that might not even be true. Bespoke accelerators & flexible fabrics will dominate.
- deleted 3y ago[deleted]
- daveguy 3y agoCan you give some examples? Are you just talking about GPUs? Those are only for massively parallel workloads. You need a CPU for literally everything else. Not familiar with flexible fabrics, so maybe I'm missing something there.
- jsheard 3y agoThey mean FPGAs I guess? They're certainly flexible but incredibly expensive for almost any purpose where a general purpose CPU or GPU could also get the job done, and incredibly expensive compared to a mass produced ASIC that does the same thing, so they're always going to be a niche thing mainly for expensive low volume products.
- synergy20 3y agowhich has a software problem, totally non portable
- dotnet00 3y agoComplete opposite of the direction things have been moving in. Unless you're arguing that something that does general purpose computation, but also has special hardware/instructions to accelerate certain tasks, is no longer a CPU (in which case we haven't used CPUs for a while now, hardware accelerated encryption has been essentially standard on most CPUs for a while).
- klelatti 3y agoDon't agree with the parent comment but we haven't really been moving in the opposite direction with special purpose instructions either. Look at a modern smartphone SoC (eg [1]) how much of that die is CPU even with caches? And as ML becomes more important it's only going in one direction. [1] https://www.semianalysis.com/p/apple-a15-die-shot-and-annotation https://www.semianalysis.com/p/apple-a15-die-shot-and-annota...
- rwmj 3y agoDon't forget AMD's even weirder and rarer ARM chip: https://www.theregister.com/2016/01/14/amd_arm_seattle_launch/ https://www.theregister.com/2016/01/14/amd_arm_seattle_launc... https://en.wikipedia.org/wiki/Opteron#A1100-series https://en.wikipedia.org/wiki/Opteron#A1100-series