Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site nvuxd.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!gamma!pyuxww!pyuxv!nvuxr!nvuxd!michael
From: michael@nvuxd.UUCP (M.CAIN)
Newsgroups: net.arch,net.decus,net.micro
Subject: Re: DEC PRO350 Floating Point
Message-ID: <147@nvuxd.UUCP>
Date: Tue, 12-Mar-85 10:51:29 EST
Article-I.D.: nvuxd.147
Posted: Tue Mar 12 10:51:29 1985
Date-Received: Wed, 13-Mar-85 01:28:41 EST
References: <2810@ncsu.UUCP>, <3100001@rna.UUCP>
Organization: Bell Communications Research
Lines: 17
Xref: watmath net.arch:968 net.decus:92 net.micro:9675

The exact nature of the benchmark can, of course,
influence the results.  We've tried some floating
point signal processing routines, and the Pro350
and PC/XT (both running VENIX) were pretty close
(on the order of 5-10%).  I suspect that this was
so because the routines were manipulating large
arrays of floating point numbers, and the PC was
slowed substantially by its 8-bit bus.

I seem to recall seeing at least one "benchmark"
that showed the PC with 8087 was about 0.60 VAX,
but used so few floating point values that they
could all be kept in the 8087 registers.

Michael Cain
Bell Communications Research
..!bellcore!nvuxd!michael