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Date: Mon, 14 Oct 2013 00:16:06 +0200
From: magnum <>
Subject: Re: Re: "AVX 4x" instead of "AVX 8x"

On 2013-10-09 11:47, Dhiru Kholia wrote:
> On 10/02/13 at 07:30pm, magnum wrote:
>> Just to confuse you a bit more I just committed a change so you'll get 8x
>> from now on (you'll need to "make clean" after pulling that) because this
>> seems to be slightly faster for version 4.7 and 4.8 of gcc.
> It worked. I now get "8x" on my system too :-)

Just for the record I changed this again, after finally realizing why I 
got different results at different times. Now, if you have gcc >= 4.7 
*and* have (and build for) AVX/XOP, you get 8x, otherwise you get 4x. I 
tested a snapshot of gcc-4.9 and it too is fine with this.


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