linux-kernel - Re: [patch 03/36] Hexagon: Add bitops support

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Message-ID: <20110826203410.GB6630@ucw.cz>
Date:	Fri, 26 Aug 2011 22:34:10 +0200
From:	Pavel Machek <pavel@....cz>
To:	Richard Kuo <rkuo@...eaurora.org>
Cc:	linux-kernel@...r.kernel.org, linux-hexagon@...r.kernel.org
Subject: Re: [patch 03/36] Hexagon: Add bitops support

Hi!

> +	__asm__ __volatile__ (
> +	"	{R10 = %1; R11 = asr(%2,#5); }\n"
> +	"	{R10 += asl(R11,#2); R11 = and(%2,#0x1f)}\n"
> +	"1:	R12 = memw_locked(R10);\n"
> +	"	{ P0 = tstbit(R12,R11); R12 = clrbit(R12,R11); }\n"
> +	"	memw_locked(R10,P1) = R12;\n"
> +	"	{if !P1 jump 1b; %0 = mux(P0,#1,#0);}\n"

Nice assembly syntax, btw. I can only wish architectures such as arm
used something as readable...
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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