From: Andreas Schwab <schwab@suse.de>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: Corey Minyard <minyard@acm.org>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: Patch to 2.6.8.1-mm2 to allow multiple NMI handlers to be registered
Date: Thu, 19 Aug 2004 18:45:58 +0200 [thread overview]
Message-ID: <jek6vvvzy1.fsf@sykes.suse.de> (raw)
In-Reply-To: <16676.54504.957712.269455@alkaid.it.uu.se> (Mikael Pettersson's message of "Thu, 19 Aug 2004 18:27:20 +0200")
Mikael Pettersson <mikpe@csd.uu.se> writes:
> Which is the same as saying it occurs on the negative-to-non-negative
> transition. The "if ((int)low >= 0)" test is just a test and branch
> on sign, while your original requires either a (microcoded?) bit op,
> or constructing a large-magnitude mask, followed by some tests.
gcc should be able to convert one into the other depending on which one is
faster.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2004-08-19 16:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-19 14:35 Corey Minyard
2004-08-19 15:29 ` Mikael Pettersson
2004-08-19 16:16 ` Corey Minyard
2004-08-19 16:27 ` Mikael Pettersson
2004-08-19 16:45 ` Andreas Schwab [this message]
2004-08-19 16:31 ` John Levon
2004-08-20 22:42 ` Zwane Mwaikambo
2004-08-19 19:15 ` Corey Minyard
2004-08-19 16:40 ` Andreas Dilger
2004-08-19 19:27 ` Corey Minyard
2004-08-21 10:26 Mikael Pettersson
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