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Date: Fri, 9 Dec 2016 11:18:00 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
        John Stultz <john.stultz@linaro.org>, Ingo Molnar <mingo@kernel.org>,
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        Parit Bhargava <prarit@redhat.com>,
        Laurent Vivier <lvivier@redhat.com>,
        "Christopher S. Hall" <christopher.s.hall@intel.com>
Subject: Re: [patch 5/6] [RFD] timekeeping: Provide optional 128bit math
Message-ID: <20161209101800.GT3174@twins.programming.kicks-ass.net>
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On Fri, Dec 09, 2016 at 07:38:47AM +0100, Peter Zijlstra wrote:

> Turns out using GCC-6.2.1 we have the same problem on i386, GCC doesn't
> recognise the 32x32 mults and generates crap.
> 
> This used to work :/

I tried:

gcc-4.4: good
gcc-4.6, gcc-4.8, gcc-5.4, gcc-6.2: bad