linux-kernel - Re: [PATCH 7/8] i386: bitops: Kill needless usage of __asm__ __volatile_

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Message-ID: <46A51254.8000508@goop.org>
Date:	Mon, 23 Jul 2007 13:40:52 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Trent Piepho <xyzzy@...akeasy.org>
CC:	Satyam Sharma <ssatyam@....iitk.ac.in>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	Nick Piggin <nickpiggin@...oo.com.au>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 7/8] i386: bitops: Kill needless usage of __asm__ __volatile__

Trent Piepho wrote:
> gcc also tries to count the number of instructions, to guess how large in
> bytes the asm block is, as it could make a difference for near vs short
> jumps, etc.
>   

How does it do that?  By looking for \n, ';', etc?

    J
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