Re: 80-20

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Article #2954

#2954

From: Henry Spencer
Date: Sun, 12 Nov 1989 02:07

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In article <6927@pt.cs.cmu.edu> lindsay@MATHOM.GANDALF.CS.CMU.EDU (Donald Lindsay) writes:
>If DEC would document exactly what's in that 80%, then VAX compiler
>writers could FINALLY settle the subject of choosing between
>different instruction sequences.

Odds are good that you wouldn't go far wrong if you treated the VAX as
a RISC:  use the simple instructions and addressing modes and ignore the
messy ones.  Actually, I'm told that many CISCs perform better with code
generated that way.
-- 
A bit of tolerance is worth a  |     Henry Spencer at U of Toronto Zoology
megabyte of flaming.           | uunet!attcan!utzoo!henry henry@zoo.toronto.edu

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Message-ID: <1989Nov12.020742.8838@utzoo.uucp>

Path: arc1-ca.pugleaf.net!utzoo!henry

References: <6927@pt.cs.cmu.edu>

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Newsgroups: comp.arch
Path: arc1-ca.pugleaf.net!utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: 80-20
Message-ID: <1989Nov12.020742.8838@utzoo.uucp>
Organization: U of Toronto Zoology
References: <6927@pt.cs.cmu.edu>
Date: Sun, 12 Nov 89 02:07:42 GMT

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