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Article #10276

Re: Bitfield and loop instructions--a good idea?

#10276
From: Michael Meissner
Date: Tue, 16 Apr 1991 16:52
21 lines
1669 bytes
In article <2302@spim.mips.COM> zalman@mips.com (Zalman Stern) writes:

| Rlimi does left and right logical immediate shifts. (I think it corresponds
| to what most shifter hardware looks like internally as well.) I hacked some
| assembly for this machine and was amazed at how often rlimi came in handy.
| (This instruction is so cool I'd almost advocate adding it to our
| instruction set. But Earl would probably hit me over the head with an R4000
| architecture manual and make me write "Thou shalt pay attention to dynamic
| instruction frequency statistics!" 100 times on my whiteboard.)

I wouldn't be surprised if a workstation running X, actually could do
a fair bit of these instructions in the server bitblt's.  Of course if
you don't have a direct display, but use an X terminal, you wouldn't
see these.  However, it's probably harder to measure dynamic
instruction frequency in such a case.....

--
Michael Meissner	email: meissner@osf.org		phone: 617-621-8861
Open Software Foundation, 11 Cambridge Center, Cambridge, MA, 02142

Considering the flames and intolerance, shouldn't USENET be spelled ABUSENET?
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Message-ID: <MEISSNER.91Apr16125239@curley.osf.org>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!paperboy!meissner
References: <1991Apr15.193425.3436@waikato.ac.nz> <2302@spim.mips.COM>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!paperboy!meissner
From: meissner@osf.org (Michael Meissner)
Newsgroups: comp.arch
Subject: Re: Bitfield and loop instructions--a good idea?
Message-ID: <MEISSNER.91Apr16125239@curley.osf.org>
Date: 16 Apr 91 16:52:39 GMT
References: <1991Apr15.193425.3436@waikato.ac.nz> <2302@spim.mips.COM>
Sender: news@OSF.ORG
Organization: Open Software Foundation
Lines: 21
In-reply-to: zalman@mips.com's message of 16 Apr 91 01:36:59 GMT