They are the same *architectural* register, but due to register renaming, they *... | Hacker News

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colejohnson66 on Nov 30, 2020 | parent | context | favorite | on: How many registers does an x86-64 CPU have?

They are the same architectural register, but due to register renaming, they may not reside in the same physical transistors. That’s probably why the author supersets them.

fulafel on Nov 30, 2020 [–]

But the author dismisses registers that are microarchitectural details.

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