From: Brian Gerst <bgerst@didntduck.org>
To: antirez@invece.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: * 4 converted to << 2 for networking code
Date: Wed, 10 Jan 2001 09:54:04 -0500 [thread overview]
Message-ID: <3A5C778C.CFB363F3@didntduck.org> (raw)
In-Reply-To: <20010110174859.R7498@prosa.it>
antirez wrote:
>
> Hi all,
>
> The attached patch converts many occurences of '* 4' in the networking code
> (often used to convert in bytes the TCP data offset and the IP header len)
> to the faster '<< 2'. Since this was a quite repetitive work it's better
> if someone double-check it before to apply the patch.
> The patch is for linux-2.4.
This patch isn't really necessary, because GCC will automatically
convert multiplications and divisions by powers of two to use shifts.
--
Brian Gerst
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next prev parent reply other threads:[~2001-01-10 14:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-10 16:48 * 4 converted to << 2 for networking code antirez
2001-01-10 14:38 ` David S. Miller
2001-01-10 14:54 ` Brian Gerst [this message]
2001-01-10 17:03 ` antirez
2001-01-10 15:11 ` Jakob Østergaard
2001-01-10 15:18 ` Mike Harrold
2001-01-10 15:31 ` Chris Jones
2001-01-10 16:23 ` Jamie Lokier
2001-01-10 16:26 ` Mike Harrold
2001-01-10 17:25 ` antirez
2001-01-10 16:25 ` Pauline Middelink
2001-01-11 0:29 ` H. Peter Anvin
2001-01-10 22:21 ` Matthias Andree
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