Path: utzoo!attcan!uunet!snorkelwacker!apple!baum
From: baum@Apple.COM (Allen J. Baum)
Newsgroups: comp.arch
Subject: Re: 680x0 instructions (was: '040 vs SPARC)
Message-ID: <38554@apple.Apple.COM>
Date: 12 Feb 90 18:55:42 GMT
References: <645@ssp11.idca.tds.philips.nl>
Reply-To: baum@apple.UUCP (Allen Baum)
Organization: Apple Computer, Inc.
Lines: 14

[]

>In article <604@bbxsda.UUCP> scott@bbxsda.UUCP (Scott Amspoker) writes:
>
>>structure accesses with pointers such as "pointer->field".  The
>>68020 double-indirect-with-offset addressing mode is a real life saver [...]

A very waterlogged lifesaver. It is not clear that the fancy addressing
modes run faster than a sequence of simpler insts., according to my sources.
It is likely to get worse, rather than better, in future implementations

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