Path: utzoo!attcan!uunet!cs.utexas.edu!usc!bbn!tdonahue@prost.bbn.com
From: tdonahue@prost.bbn.com (Tim Donahue)
Newsgroups: comp.sys.cdc
Subject: Re: CDC nostalgia; too many addressing modes
Message-ID: <54849@bbn.COM>
Date: 13 Apr 90 18:47:05 GMT
References: <1990Mar29.164944.19446@msuinfo.cl.msu.edu> <28567@cup.portal.com> <27675@ut-emx.UUCP>
Sender: news@bbn.COM
Reply-To: tdonahue@prost.bbn.com (Tim Donahue)
Organization: BBN Advanced Computers, Inc.
Lines: 19
In-reply-to: kjm@ut-emx.UUCP

In article <27675@ut-emx.UUCP>, kjm@ut-emx writes:
>In article <28567@cup.portal.com>, Tim_N_Roberts@cup.portal.com writes:
>> I can't believe people are complaining about the inclusion of
>>         SAi   Aj+Bk
>> in the instruction set, but no one has said ANYTHING about population count!
>> If ever an instruction called out to be replaced, it was CXi Xj.
>
>Speak for yourself!  Pop-count was, at minimum, good for fixing the
>"negative zero" problem.  It could also be used to good advantage in
>other situations in dealing with bit vectors.
>

How so?

>
>Kenneth J. Montgomery               Senior Operating System Specialist

Cheers,
Tim