From: Richard Henderson <rth@twiddle.net>
To: Martin Dalecki <dalecki@evision-ventures.com>
Cc: tytso@mit.edu, Jakub Jelinek <jakub@redhat.com>,
Horst von Brand <vonbrand@sleipnir.valparaiso.cl>,
linux-kernel@vger.kernel.org
Subject: Re: 2.4.0-test10-pre6: Use of abs()
Date: Thu, 2 Nov 2000 11:37:26 -0800 [thread overview]
Message-ID: <20001102113726.A19505@twiddle.net> (raw)
In-Reply-To: <200010281629.e9SGTah07672@sleipnir.valparaiso.cl> <39FD7F2C.9A3F3976@evision-ventures.com> <20001030081938.K6207@devserv.devel.redhat.com> <39FD9E6A.AD10E699@evision-ventures.com> <20001101094619.A15283@trampoline.thunk.org> <20001101102216.A18206@twiddle.net> <3A015AB9.D3B80830@evision-ventures.com>
In-Reply-To: <3A015AB9.D3B80830@evision-ventures.com>
On Thu, Nov 02, 2000 at 01:14:49PM +0100, Martin Dalecki wrote:
> However what's the difference in respect of optimization between
> unrolling the abs function by hand and relying on the built in?
Should be nothing. The expanded source expression should get
folded immediately to an ABS_EXPR node, at which point you are
at exactly the same point as the builtin would have gotten you.
r~
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2000-11-02 19:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-28 16:29 2.4.0-test10-pre6: Use of abs() Horst von Brand
2000-10-30 14:01 ` Martin Dalecki
2000-10-30 13:19 ` Jakub Jelinek
2000-10-30 16:14 ` Martin Dalecki
2000-11-01 14:46 ` tytso
2000-11-01 18:22 ` Richard Henderson
2000-11-02 12:14 ` Martin Dalecki
2000-11-02 19:37 ` Richard Henderson [this message]
2000-11-02 3:02 ` Theodore Y. Ts'o
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=20001102113726.A19505@twiddle.net \
--to=rth@twiddle.net \
--cc=dalecki@evision-ventures.com \
--cc=jakub@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=tytso@mit.edu \
--cc=vonbrand@sleipnir.valparaiso.cl \
/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.