Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Tue, 30 Jul 2019 10:08:43 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Alexey Dobriyan <adobriyan@gmail.com>
Cc:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
        x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: drop REG_OUT macro from hweight functions
Message-ID: <20190730080843.GG31381@hirez.programming.kicks-ass.net>
References: <20190728115140.GA32463@avx2>
 <20190729094329.GW31381@hirez.programming.kicks-ass.net>
 <20190729100447.GD31425@hirez.programming.kicks-ass.net>
 <20190729204417.GA2146@avx2>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20190729204417.GA2146@avx2>
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Jul 29, 2019 at 11:44:17PM +0300, Alexey Dobriyan wrote:
> On Mon, Jul 29, 2019 at 12:04:47PM +0200, Peter Zijlstra wrote:
> > +#define _ASM_ARG1B	__ASM_FORM_RAW(dil)
> > +#define _ASM_ARG2B	__ASM_FORM_RAW(sil)
> > +#define _ASM_ARG3B	__ASM_FORM_RAW(dl)
> > +#define _ASM_ARG4B	__ASM_FORM_RAW(cl)
> > +#define _ASM_ARG5B	__ASM_FORM_RAW(r8b)
> > +#define _ASM_ARG6B	__ASM_FORM_RAW(r9b)
> 
> I preprocessed percpu code once to see what precisely it does because
> it was easier than wading through forest of macroes.

Per cpu is easy, try reading the tracepoint code ;-)