Linked by Thom Holwerda on Fri 28th Jul 2017 19:49 UTC
AMD

So far all the products launched with Zen have aimed at the upper echelons of the PC market, covering mainstream, enthusiasts and enterprise customers - areas with high average selling prices to which a significant number of column inches are written. But the volume segment, key for metrics such as market share, are in the entry level products. So far the AMD Zen core, and the octo-core Zeppelin silicon design, has been battling on the high-end. With Ryzen 3, it comes to play in the budget market.

AnandTech's review and benchmarks of the new low-end Ryzen 3 processors.

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RE[8]: Comment by raom
by Treza on Sat 29th Jul 2017 22:31 UTC in reply to "RE[7]: Comment by raom"
Treza
Member since:
2006-01-11

There are a few issues in MC68000 family that makes it arguably worse for high performance.

Most of x86 issues can be solved by more microcode : Call gates, segmentation, ... and the lack of registers was solved by OoO renaming and AMD64. Most x86 instructions are actually not very complex and can be easily executed in 1 or 2 cycles. There very little of indirect, autoincrement or other advanced addressing modes.

The MC68020 has crazy indirect instructions which can trap while being partially executed (and saving the execution context of extremely complex CPUs is an issue when looking for high performance), it updates the flags for every instruction which reduce the efficiency of speculative execution, various other issues... Motorola actually discarded many silly parts in later models : The discrete MMU with many useless features, lesser used FPU instructions such as "Hyperbolic Cosine", etc.



(but, of course, it could have been possible, flying pigs, etc. )

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