From: kenner@lab.ultra.nyu.edu (Richard Kenner)
Subject: Re: Waiver question
Date: 1997/04/29
Date: 1997-04-29T00:00:00+00:00 [thread overview]
Message-ID: <5k52k2$7v0$1@news.nyu.edu> (raw)
In-Reply-To: 1997Apr28.151327.1@eisner
In article <1997Apr28.151327.1@eisner> kilgallen@eisner.decus.org (Larry Kilgallen) writes:
>The minimum addressable unit on DEC Alpha is 32 bits, except for the very
>latest chip where it was altered for purposes of Intel emulation. GNAT
>reportedly "does" DEC Alpha, and I presume that is without relying on
>OS traps for every unaligned instruction :-).
This is quite confused. The Alpha was very carefully designed with a
set of instructions whose purpose is to allow efficient loading and
storing of 8- and 16-bit objects. DEC has a nice explanation of these
sequences someplace on their web pages (sorry, but I can't find my
pointer to it at the moment).
The problem with these sequences is that they are not atomic. That
is that problem that will be remedied on Alpha processors starting
with EV56.
next prev parent reply other threads:[~1997-04-29 0:00 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-04-18 0:00 Waiver question Ken Garlington
1997-04-19 0:00 ` Tom Moran
1997-04-20 0:00 ` Robert Dewar
1997-04-21 0:00 ` Ken Garlington
1997-04-22 0:00 ` Ken Garlington
1997-04-23 0:00 ` Corey Minyard
1997-04-24 0:00 ` Richard Kenner
1997-04-28 0:00 ` Larry Kilgallen
1997-04-28 0:00 ` Corey Minyard
1997-04-29 0:00 ` Laurent Guerby
1997-04-30 0:00 ` Corey Minyard
1997-04-29 0:00 ` Kaz Kylheku
1997-04-29 0:00 ` Robert Dewar
1997-04-29 0:00 ` Robert Dewar
1997-04-29 0:00 ` Richard Kenner [this message]
1997-04-30 0:00 ` Robert A Duff
1997-05-01 0:00 ` Kaz Kylheku
1997-05-02 0:00 ` Robert A Duff
1997-05-02 0:00 ` Larry Kilgallen
1997-05-02 0:00 ` Robert A Duff
1997-05-02 0:00 ` Larry Kilgallen
1997-05-03 0:00 ` Robert A Duff
1997-05-03 0:00 ` Larry Kilgallen
1997-05-04 0:00 ` Robert Dewar
1997-05-04 0:00 ` Robert Dewar
1997-05-02 0:00 ` Robert Dewar
1997-05-06 0:00 ` John M. Mills
1997-04-30 0:00 ` Robert Dewar
1997-05-01 0:00 ` Larry Kilgallen
1997-05-07 0:00 ` Bad .diff files in gnat-3.09 in Linux Benoit Jauvin-Girard
1997-05-09 0:00 ` Albert K. Lee
1997-04-23 0:00 ` Waiver question Tarjei Jensen
1997-04-20 0:00 ` Steve Doiel
1997-04-20 0:00 ` Dean Runzel
1997-04-22 0:00 ` Ken Garlington
1997-04-21 0:00 ` Robert I. Eachus
1997-04-21 0:00 ` Robert Dewar
1997-04-22 0:00 ` Robert I. Eachus
1997-04-23 0:00 ` Robert Dewar
1997-04-22 0:00 ` Ken Garlington
1997-04-23 0:00 ` Robert S. White
1997-04-24 0:00 ` Robert Dewar
1997-04-24 0:00 ` Steve Vestal
1997-04-25 0:00 ` Ken Garlington
1997-04-25 0:00 ` Robert I. Eachus
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