From: Peter Chubb <peter@chubb.wattle.id.au>
To: linux-ia64@vger.kernel.org
Subject: Unaligned access question
Date: Thu, 25 Sep 2003 02:04:55 +0000 [thread overview]
Message-ID: <marc-linux-ia64-106445553030155@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-106445366428887@msgid-missing>
>>>>> "Ian" = Ian Wienand <ianw@gelato.unsw.edu.au> writes:
Ian> Hi,
Ian> This isn't directly related to kernel development, but I am a bit
Ian> stumped as to why my test program below causes an unaligned
Ian> access when 'i' is 7 (that is, when it tries to access across a
Ian> 64 bit boundary of 'array'). It's counter intuitive to me, I
Ian> would have expected it either fault on all loads (for every value
Ian> of 'i') or to have not faulted at all.
The IA64 can handle unaligned acceses itself if they're within a small
window -- eight bytes for Itanium-2, can't remember for Itanium-I --
and if PSR.ac is 0.
--
Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
You are lost in a maze of BitKeeper repositories, all slightly different.
next prev parent reply other threads:[~2003-09-25 2:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-25 1:34 Unaligned access question Ian Wienand
2003-09-25 2:04 ` Peter Chubb [this message]
2003-09-25 2:23 ` Martin Pool
2003-09-25 8:32 ` Andreas Schwab
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=marc-linux-ia64-106445553030155@msgid-missing \
--to=peter@chubb.wattle.id.au \
--cc=linux-ia64@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.