You make it sound as if there were four Intel/AMD x86/x64 architectures. And wel...

Kwpolska on Jan 19, 2021 | parent | context | favorite | on: That XOR Trick (2020)

You make it sound as if there were four Intel/AMD x86/x64 architectures. And well, there aren’t. The vendor split is not a thing, we’re all running the same software on Intel and AMD x86/x64 processors. And you could argue that the x86/x64 split doesn’t really matter for this, since x64 is a superset of x86 and inherits this tradition from the 16-bit and 32-bit eras.

nickelpro on Jan 19, 2021 [–]

There are dozens of x86/x64 uarchs, x86 is just an ISA, doesn't say anything about how the chip is built.