From: "H. Peter Anvin" <hpa@zytor.com>
To: Rask Ingemann Lambertsen <rask@sygehus.dk>
Cc: Uros Bizjak <ubizjak@gmail.com>,
GCC Patches <gcc-patches@gcc.gnu.org>,
Jan Hubicka <jh@suse.cz>,
Richard Kenner <kenner@vlsi1.ultra.nyu.edu>,
rridge@csclub.uwaterloo.ca
Subject: Re: New back end ia16: 16-bit Intel x86
Date: Sat, 18 Aug 2007 05:33:00 -0000 [thread overview]
Message-ID: <46C6849F.1050605@zytor.com> (raw)
In-Reply-To: <20070818023424.GS25795@sygehus.dk>
Rask Ingemann Lambertsen wrote:
>
>> That backend just got to the point where we can compare code sizes; the
>> code appears 10-20% smaller than the i386 backend with .code16gcc and
>> -Os. Although that is less than I would have expected, that is without
>> any optimizations whatsoever and so the resulting code is actually quite
>> poor.
>
> You could probably save at least as much by using 16-bit integers, thus
> avoiding the 0x66 prefixes.
>
Yes, with 16-bit integers it reduced the code size even further.
-hpa
next prev parent reply other threads:[~2007-08-18 5:33 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-06 14:23 Uros Bizjak
2007-08-07 1:29 ` Rask Ingemann Lambertsen
2007-08-07 17:37 ` Daniel Jacobowitz
2007-08-07 20:03 ` Uros Bizjak
2007-08-08 12:21 ` Jan Hubicka
2007-08-08 17:30 ` Mark Mitchell
2007-08-08 23:22 ` Richard Kenner
2007-08-08 18:52 ` Rask Ingemann Lambertsen
2007-08-08 20:24 ` Michael Matz
2007-08-08 20:59 ` H.J. Lu
2007-08-08 22:46 ` DJ Delorie
2007-08-09 9:33 ` Jan Hubicka
2007-08-09 14:01 ` Rask Ingemann Lambertsen
2007-08-09 15:43 ` DJ Delorie
2007-08-08 15:28 ` Rask Ingemann Lambertsen
2007-08-17 22:38 ` H. Peter Anvin
2007-08-18 2:34 ` Rask Ingemann Lambertsen
2007-08-18 5:33 ` H. Peter Anvin [this message]
2007-08-18 17:36 ` Rask Ingemann Lambertsen
2007-08-18 17:50 ` H. Peter Anvin
2007-08-18 20:39 ` Rask Ingemann Lambertsen
2007-08-19 2:11 ` H. Peter Anvin
2007-08-19 12:25 ` Rask Ingemann Lambertsen
2007-08-19 20:07 ` H. Peter Anvin
2007-08-21 8:48 ` H. Peter Anvin
2007-08-21 14:35 ` Rask Ingemann Lambertsen
2007-08-21 17:46 ` H. Peter Anvin
2007-08-21 18:56 ` Real-mode i386 back end (Was: New back end ia16: 16-bit Intel x86) Rask Ingemann Lambertsen
2007-08-19 7:29 ` New back end ia16: 16-bit Intel x86 H. Peter Anvin
2007-08-19 10:56 ` Rask Ingemann Lambertsen
2007-08-19 21:40 ` H. Peter Anvin
-- strict thread matches above, loose matches on Subject: below --
2007-08-19 19:58 Ross Ridge
2007-08-19 16:11 Ross Ridge
2007-08-19 17:36 ` Rask Ingemann Lambertsen
2007-08-18 20:46 Ross Ridge
2007-08-19 16:20 ` Rask Ingemann Lambertsen
2007-08-02 20:15 Ross Ridge
2007-08-01 19:25 Ross Ridge
2007-08-01 22:57 ` Rask Ingemann Lambertsen
[not found] <20070801153758.ACBB974253@caffeine.csclub.uwaterloo.ca.suse.lists.egcs-patches>
2007-08-01 17:44 ` Andi Kleen
2007-08-01 15:38 Ross Ridge
2007-08-01 17:59 ` Rask Ingemann Lambertsen
2007-07-31 18:06 Ross Ridge
2007-08-01 0:34 ` Rask Ingemann Lambertsen
2007-08-01 9:53 ` Richard Kenner
2007-08-01 12:33 ` Rask Ingemann Lambertsen
2007-08-01 12:44 ` Richard Kenner
2007-08-01 13:41 ` Rask Ingemann Lambertsen
2007-08-01 13:52 ` Richard Kenner
2007-08-01 10:38 ` Jan Hubicka
2007-08-01 17:30 ` Rask Ingemann Lambertsen
2007-07-31 15:24 Ross Ridge
2007-07-31 17:44 ` Michael Matz
2007-07-31 0:50 Ross Ridge
2007-07-31 8:54 ` Tristan Gingold
2007-07-31 13:46 ` Rask Ingemann Lambertsen
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=46C6849F.1050605@zytor.com \
--to=hpa@zytor.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=jh@suse.cz \
--cc=kenner@vlsi1.ultra.nyu.edu \
--cc=rask@sygehus.dk \
--cc=rridge@csclub.uwaterloo.ca \
--cc=ubizjak@gmail.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).