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From: milazzo@rice.ARPA
Newsgroups: net.micro.amiga
Subject: Re: CSA 68020 board
Message-ID: <822@caip.RUTGERS.EDU>
Date: Mon, 23-Dec-85 11:09:13 EST
Article-I.D.: caip.822
Posted: Mon Dec 23 11:09:13 1985
Date-Received: Wed, 25-Dec-85 01:45:49 EST
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From: Paul Milazzo <milazzo@rice.ARPA>

Even more interesting than the increase in speed with the 68020 is that
the results are identical for 32 bit integers with and without
registers.  Offhand, I'd say that this C compiler doesn't do registers
at all.  Has anyone compared the assembly code generated in these two
cases?

If this hypothesis proves correct, we have one foo explanation for the
incredibly poor performance of the standard Amiga on this benchmark.
On the basis of architecture alone I would expect closer to twice the
quoted number (458) from this machine.

By the way, I assume that people collect these results without
displaying any graphics which would cut into the CPU time.  For
example, displaying a 640x200x4 image would probably destroy the
machine's performance.

				Paul G. Milazzo
				Dept. of Computer Science
				Rice University, Houston, TX
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