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From: SYSRUTH@utorphys.bitnet (Ruth Milner)
Newsgroups: comp.sys.sun
Subject: re: Sun 4/110 FPU
Message-ID: <8901162326.AA25549@gpu.utcs.toronto.edu>
Date: 20 Jan 89 23:27:50 GMT
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Original-Date: Mon, 16 Jan 89 18:26 EST
X-Sun-Spots-Digest: Volume 7, Issue 114, message 12 of 18

In v7n101, Robert Wenig (acad!robert@uunet.uu.net) asks:

>How do I detect whether or not a 4/110 actually has the FPU installed?

The Sun 4 (all models) FPU is not an option, but an integral part of the
CPU that does all floating-point operations. Sun 4's do not even support
-fsoft, because the FPU is always there. If it dies, not even your kernel
will run. Note that the man pages for cc and f77 mention this, and also
that there is no place in the config. file to put an entry for one.

If you're asking because you think your 4/110 is kind of slow for a Sun 4,
well, that's probably just the normal speed for a Sun 4/110 :-).  Unless
there's something wrong with it, of course. It should be about .6-.7 of a
Sun 4/2x0.

Ruth Milner
Systems Manager
University of Toronto Physics

sysruth@helios.physics.utoronto.ca