From: Richard Henderson <rth@twiddle.net>
To: Laurent Desnogues <laurent.desnogues@gmail.com>
Cc: Paul Brook <paul@codesourcery.com>,
aurelien@aurel32.net, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4
Date: Mon, 21 Dec 2009 14:50:11 -0800 [thread overview]
Message-ID: <4B2FFBA3.4060601@twiddle.net> (raw)
In-Reply-To: <761ea48b0912211421y2e213dc0gfed24835f3b7f658@mail.gmail.com>
On 12/21/2009 02:21 PM, Laurent Desnogues wrote:
> As far as I know these CPU's don't need the full movcond but
> only the variant with vtrue.
I know that. And I looked into TCG very closely to figure out how to
implement just that. Except then I have to modify TCG to special-case
movcond to know that DEST is both input and output. This is *much* more
work than simply having the back-end use a matching constraint on VFALSE.
> Even if movcond was quick to generate
> host code, for instance for ARM, you'd have to explicitly detect
> conditional moves
One of us is confused. Why would I have to explicitly detect
conditional moves?
r~
next prev parent reply other threads:[~2009-12-21 23:31 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-19 18:52 [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4 Richard Henderson
2009-12-19 16:50 ` [Qemu-devel] [PATCH 2/5] tcg-x86_64: Implement setcond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 18:01 ` [Qemu-devel] [PATCH 1/5] tcg: Generic support for conditional set Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 23:24 ` Richard Henderson
2009-12-19 23:45 ` Aurelien Jarno
2009-12-22 11:27 ` Laurent Desnogues
2009-12-22 16:09 ` Richard Henderson
2009-12-19 18:44 ` [Qemu-devel] [PATCH 3/5] tcg-i386: Implement small forward branches Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 23:32 ` Laurent Desnogues
2009-12-20 1:17 ` Richard Henderson
2009-12-19 18:44 ` [Qemu-devel] [PATCH 4/5] tcg: Add tcg_invert_cond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-19 18:46 ` [Qemu-devel] [PATCH 5/5] tcg-i386: Implement setcond Richard Henderson
2009-12-19 23:11 ` Aurelien Jarno
2009-12-22 12:20 ` Laurent Desnogues
2009-12-19 23:11 ` [Qemu-devel] [PATCH 0/5] tcg conditional set, round 4 Aurelien Jarno
2009-12-19 23:43 ` malc
2009-12-20 11:03 ` Blue Swirl
2009-12-20 22:57 ` Paul Brook
2009-12-21 2:00 ` Richard Henderson
2009-12-21 9:13 ` Laurent Desnogues
2009-12-21 9:47 ` [Qemu-devel] " Paolo Bonzini
2009-12-21 10:03 ` Laurent Desnogues
2009-12-21 20:28 ` [Qemu-devel] " Richard Henderson
2009-12-21 22:21 ` Laurent Desnogues
2009-12-21 22:50 ` Richard Henderson [this message]
2009-12-21 23:08 ` Laurent Desnogues
2009-12-22 0:02 ` Richard Henderson
2009-12-22 14:46 ` Laurent Desnogues
2009-12-22 7:19 ` Aurelien Jarno
2009-12-21 10:08 ` Aurelien Jarno
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=4B2FFBA3.4060601@twiddle.net \
--to=rth@twiddle.net \
--cc=aurelien@aurel32.net \
--cc=laurent.desnogues@gmail.com \
--cc=paul@codesourcery.com \
--cc=qemu-devel@nongnu.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.