linux-kernel - Re: from where comes "_

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Message-Id: <1185048053.5652.18.camel@lappy>
Date:	Sat, 21 Jul 2007 22:00:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jan-Benedict Glaw <jbglaw@...-owl.de>
Cc:	"Robert P. J. Day" <rpjday@...dspring.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: from where comes "__moddi3"?

On Sat, 2007-07-21 at 21:58 +0200, Jan-Benedict Glaw wrote:
> On Sat, 2007-07-21 21:31:13 +0200, Peter Zijlstra <peterz@...radead.org> wrote:
> > On Sat, 2007-07-21 at 15:21 -0400, Robert P. J. Day wrote:
> > 
> > use do_div().
> > 
> > 16 works because gcc translates that into a right shift.
> 
> Right shift?  Doesn't it just mask out everything but the low 4 bit?

Yeah, its bitwise and for modulo and shifts for mult and div.

Silly mistake on my side.

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