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Date: Tue, 6 Oct 2015 11:16:44 +0300
From: Solar Designer <>
Subject: Re: Agnieszka's GSoC formats

On Tue, Oct 06, 2015 at 10:01:32AM +0200, Agnieszka Bielec wrote:
> 2015-10-06 0:59 GMT+02:00 Solar Designer <>:
> > On Tue, Oct 06, 2015 at 12:42:53AM +0200, Agnieszka Bielec wrote:
> >> I modified the code, --dev=3 doesn't segfaults but on super --dev=6
> >> and my card is slower
> >>
> >> on my card it's 1882 c/s -> 1777 c/s
> >> on --dev=6 it's 6678 c/s -> 5907 c/s
> >
> > What modifications did you make?
> I created this array as long and I'm casting it to int

Are you casting it to int all the time or only sometimes?  If all the
time, then why create it as long?  If only sometimes, then you're still
violating strict aliasing rules when those apply.


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