From: Mark H Weaver <mhw@netris.org>
To: Andy Wingo <wingo@pobox.com>
Cc: "Ludovic Courtès" <ludo@gnu.org>, guile-devel@gnu.org
Subject: Re: Register VM WIP
Date: Wed, 16 May 2012 12:27:10 -0400 [thread overview]
Message-ID: <87obpo9jmp.fsf@netris.org> (raw)
In-Reply-To: <87r4uki35b.fsf@pobox.com> (Andy Wingo's message of "Wed, 16 May 2012 16:58:24 +0200")
Hi Andy,
Andy Wingo <wingo@pobox.com> writes:
> Likewise I can imagine cases in which you might end up with more than
> 2**12 active locals, especially in the presence of macros. In that case
> you spill. But where do you spill?
You spill to them to stack of course, which brings me to my next point:
as discussed in chapter 4 of David Kranz's thesis on the Orbit compiler
(highly recommended reading) it is sometimes better to store a local on
the stack, even if you have registers to spare. The reason is that
registers must be saved and restored for every procedure call, and as we
all know, Scheme has no shortage of those.
What's your plan for saving and restoring such a large register file?
Best,
Mark
next prev parent reply other threads:[~2012-05-16 16:27 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-11 16:19 Register VM WIP Andy Wingo
2012-05-11 20:29 ` Stefan Israelsson Tampe
2012-05-16 15:01 ` Andy Wingo
2012-05-14 21:09 ` Ludovic Courtès
2012-05-14 21:28 ` Andrew Gwozdziewycz
2012-05-15 18:45 ` Andy Wingo
2012-05-16 0:39 ` Noah Lavine
2012-05-16 4:23 ` Mark H Weaver
2012-05-16 7:15 ` Andy Wingo
2012-05-16 13:44 ` Mark H Weaver
2012-05-16 14:00 ` David Kastrup
2012-05-16 14:54 ` Noah Lavine
2012-05-16 15:05 ` Andy Wingo
2012-05-16 20:39 ` Ludovic Courtès
2012-05-16 14:58 ` Andy Wingo
2012-05-16 16:27 ` Mark H Weaver [this message]
2012-05-16 16:39 ` Andy Wingo
2012-05-16 18:23 ` Noah Lavine
2012-05-16 7:10 ` Andy Wingo
2012-05-15 18:49 ` Andy Wingo
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
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87obpo9jmp.fsf@netris.org \
--to=mhw@netris.org \
--cc=guile-devel@gnu.org \
--cc=ludo@gnu.org \
--cc=wingo@pobox.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).