Re: OoO execution (was: The Seymour Cray Era of Supercomputers)

On Mon, 19 May 2025 23:41:15 +0300, Michael S wrote:

What about PPC604? It had more limited OoO resources than the 3
processors you mentioned above, esp. fewer numeber of reservation
stations, but it most certainly had reorder buffers, 16 of them.
So, by your own definitions, it should be called the first single-chip
full-blown CPU.

Was it a PowerPC 604-based Apple Mac that was the first PC to exceed the
then-current US Department of Defense threshold for the definition of a
“supercomputer”? I think it might have been 1 gigaFLOPS at the time. (Or
is that too high for the time?)

That meant it was subject to export restrictions. I remember Apple making
a lot of publicity about it at the time.

Of course, the threshold was raised soon after.