alt Hacker NewsSmall correction, Pentium Pro was the first OoO microprocessor from Intel. Others like IBM POWER1 came earlier
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jabl • today at 11:18 AM
OoO is a surprisingly old idea, first used in the IBM System/360 Model 91 released all the way back in 1966.
https://en.wikipedia.org/wiki/Tomasulo's_algorithm
Took a while until transistor budgets allowed it to be implemented in consumer microprocessors.
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chasil • today at 9:29 AM
Very true, Bob Colwell was hired with past experience in this, I think from "Cyndrome" (edit: Multiflow).
It was intel's (at least) second OoO processor, after i960 - from which it pulled important team members.