Path: utzoo!attcan!uunet!lll-winken!maddog!brooks
From: brooks@maddog.llnl.gov (Eugene Brooks)
Newsgroups: comp.arch
Subject: Re: Intel 860 Architecture
Message-ID: <41128@lll-winken.LLNL.GOV>
Date: 10 Dec 89 07:44:56 GMT
References: <3818@convex.UUCP>
Sender: usenet@lll-winken.LLNL.GOV
Reply-To: brooks@maddog.llnl.gov (Eugene Brooks)
Organization: Lawrence Livermore National Laboratory
Lines: 10

In article <3818@convex.UUCP> hamrick@convex.COM (Ed Hamrick) writes:
>   - What other architectures use reciprocal -> multiply for divide?
The machines made at CRI do this.
>   - What are the numerical accuracy tradeoffs?
As good as Newton Raphson can be.
>   - How many cycles does the reciprocal instruction take? Can it be
>     pipelined?
Yes it can be pipelined, on the Cray it is pipelined.
I don't remember about the 860.
brooks@maddog.llnl.gov, brooks@maddog.uucp