Re: Sun 4/110 FPU

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Article #10635

#10635

From: Paul V. O'Neill
Date: Tue, 31 Jan 1989 18:04

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>Ruth Milner (v7n114) reports all Sun 4's come with FPU's.

Sorry, this is totally wrong.  FPU for a 4/110 is optional and simulation
of a missing FPU is in the kernel (which is why you don't have any -fxxx
options.)

To see if you have an FPU installed:

"time program_name"

Assuming program_name has a lot of floating point calculations, it will
run very slowly (about 20-90 times slower than a 3/50 w/ 68881) and time
will report tons of system time if you don't have an FPU.  If you do have
an FPU, it will scream and system time will be ~0.0.

See sun-spots v6n217, v6n222, v6n235, v6n279

Paul O'Neill                 pvo@oce.orst.edu
Coastal Imaging Lab
OSU--Oceanography
Corvallis, OR  97331         503-754-3251

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: pvo1478@oce.orst.edu (Paul V. O'Neill)
Newsgroups: comp.sys.sun
Subject: Re: Sun 4/110 FPU
Message-ID: <8901240122.AA08914@sapphire.oce.orst.edu>
Date: 31 Jan 89 18:04:29 GMT
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Original-Date: Mon, 23 Jan 89 17:22:55 PST
X-Sun-Spots-Digest: Volume 7, Issue 130, message 2 of 17