linux-kernel - Re: [patch V4 09/31] bitops: Add x86-specific parity functions

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Message-ID: <20160517112259.GY3193@twins.programming.kicks-ass.net>
Date:	Tue, 17 May 2016 13:22:59 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Zhaoxiu Zeng <zengzhaoxiu@....com>, linux-kernel@...r.kernel.org,
	bp@...e.de, gnomes@...rguk.ukuu.org.uk, andi@...stfloor.org,
	dvyukov@...gle.com, Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Denys Vlasenko <dvlasenk@...hat.com>
Subject: Re: [patch V4 09/31] bitops: Add x86-specific parity functions

On Mon, May 16, 2016 at 12:22:05PM -0700, H. Peter Anvin wrote:
> On May 16, 2016 10:06:08 AM PDT, Peter Zijlstra <peterz@...radead.org> wrote:

> >blergh; GCC does indeed make a mess of that. It looks we'll need the
> >cc-output stuff for this in order for GCC to generates sane code for
> >that :/
> 
> For what it's worth, I have a patchset for cc out just about ready to post.  It is in gcc 6.1.

Nice, looking fwd to play with that. Thanks!