From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Waiver question
Date: 1997/04/29
Date: 1997-04-29T00:00:00+00:00 [thread overview]
Message-ID: <dewar.862311071@merv> (raw)
In-Reply-To: 1997Apr28.151327.1@eisner
Larry says
<<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 :-).>>
You are confusing addressibility with accesibility. The minimum addressable
unit on the DEC Alpha (all models) is 8-bits, since it has normal byte
addressing. It is true that to *access* a single byte, you need to generate
a couple of extra instructions, but that is easy to handle.
Where the minimum *addressable* unit is 32-bits, things are more complex,
but the 1750-A port of GCC would indicate that this can certainly be done,
and from reports, there are indeed ports of GCC for 32-bit addressable
machines, so it is certainly feasible.
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 ` Dean Runzel
1997-04-22 0:00 ` Ken Garlington
1997-04-20 0:00 ` Steve Doiel
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 ` Richard Kenner
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
1997-04-30 0:00 ` Waiver question 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
1997-04-29 0:00 ` Robert Dewar [this message]
1997-04-23 0:00 ` Tarjei Jensen
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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