cctalk Digest, Vol 3, Issue 28

From: Eric Smith <eric_at_brouhaha.com>
Date: Thu Nov 13 23:54:33 2003

I wrote about the IBM 7030 (Stretch) having a limited form of speculative
execution back in 1961, and that I wasn't aware of any other processor
before 1994 that had it.

Steven Wilson wrote:
> If I'm not mistaken - this approach was used in later Burroughs hardware,
> like the B6800, B6900, B4900 series machines (late 70's early 80's.)

Could well be.

> I would imagine the IBM 360/91 also did this.

The 360/91 was the first machine to have register renaming (Tomasulo
alogrithm), which is now used in almost all recent high-performance
processors. But AFAIK it did not have speculative execution.

Eric
Received on Thu Nov 13 2003 - 23:54:33 GMT