From: Christoph Lameter <cl@linux.com>
To: Daniel Borkmann <dborkman@redhat.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Hannes Frederic Sowa <hannes@stressinduktion.org>,
Eric Dumazet <eric.dumazet@gmail.com>,
Austin S Hemmelgarn <ahferroin7@gmail.com>,
Jesse Gross <jesse@nicira.com>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Stephen Hemminger <stephen@networkplumber.org>,
Matt Mackall <mpm@selenic.com>, Pekka Enberg <penberg@kernel.org>,
Andy Gospodarek <andy@greyhouse.net>,
Veaceslav Falico <vfalico@redhat.com>,
Jay Vosburgh <fubar@us.ibm.com>,
Jakub Zawadzki <darkjames-ws@darkjames.pl>
Subject: Re: [PATCH net-next 2/2] reciprocal_divide: correction/update of the algorithm
Date: Thu, 16 Jan 2014 10:37:37 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.10.1401161036110.29778@nuc> (raw)
In-Reply-To: <1389828228-30312-3-git-send-email-dborkman@redhat.com>
On Thu, 16 Jan 2014, Daniel Borkmann wrote:
> - * or else the performance is slower than a normal divide.
> - */
> -extern u32 reciprocal_value(u32 B);
> +struct reciprocal_value {
> + u32 m;
> + u8 sh1, sh2;
> +};
>
> +#define RECIPROCAL_VALUE_RESULT_TO_ZERO ((struct reciprocal_value){.sh1 = 32})
>
> -static inline u32 reciprocal_divide(u32 A, u32 R)
> +struct reciprocal_value reciprocal_value(u32 d);
A function that returns a struct? That works? Which gcc versions support
it?
next prev parent reply other threads:[~2014-01-16 16:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-15 23:23 [PATCH net-next 0/2] reciprocal_divide updates Daniel Borkmann
2014-01-15 23:23 ` [PATCH net-next 1/2] random32: add prandom_u32_lt_N and convert "misuses" of reciprocal_divide Daniel Borkmann
2014-01-16 0:29 ` Joe Perches
2014-01-16 9:22 ` Daniel Borkmann
2014-01-16 3:14 ` Eric Dumazet
2014-01-16 9:28 ` David Laight
2014-01-16 9:30 ` Daniel Borkmann
2014-01-15 23:23 ` [PATCH net-next 2/2] reciprocal_divide: correction/update of the algorithm Daniel Borkmann
2014-01-16 0:17 ` Ben Hutchings
2014-01-16 0:46 ` Hannes Frederic Sowa
2014-01-16 3:07 ` Eric Dumazet
2014-01-16 10:26 ` Hannes Frederic Sowa
2014-01-16 16:37 ` Christoph Lameter [this message]
2014-01-16 17:24 ` Hannes Frederic Sowa
2014-01-17 10:05 ` David Laight
2014-01-16 18:50 ` Ben Hutchings
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=alpine.DEB.2.10.1401161036110.29778@nuc \
--to=cl@linux.com \
--cc=ahferroin7@gmail.com \
--cc=andy@greyhouse.net \
--cc=darkjames-ws@darkjames.pl \
--cc=davem@davemloft.net \
--cc=dborkman@redhat.com \
--cc=eric.dumazet@gmail.com \
--cc=fubar@us.ibm.com \
--cc=hannes@stressinduktion.org \
--cc=jesse@nicira.com \
--cc=jhs@mojatatu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mpm@selenic.com \
--cc=netdev@vger.kernel.org \
--cc=penberg@kernel.org \
--cc=stephen@networkplumber.org \
--cc=vfalico@redhat.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