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From: keramida@freebsd.org (Giorgos Keramidas)
To: Dan Naumov <dan.naumov@gmail.com>
References: <cf9b1ee01003021326ja02110fjd91bc4977dd0c3cf@mail.gmail.com>
Date: Wed, 03 Mar 2010 19:09:26 +0200
In-Reply-To: <cf9b1ee01003021326ja02110fjd91bc4977dd0c3cf@mail.gmail.com> (Dan
	Naumov's message of "Tue, 2 Mar 2010 23:26:20 +0200")
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Cc: freebsd-questions@freebsd.org
Subject: Re: Compiler Flags problem with core2 CPU
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On Tue, 2 Mar 2010 23:26:20 +0200, Dan Naumov <dan.naumov@gmail.com> wrote:
>>See the section "3.17.14 Intel 386 and AMD x86-64 Options" in the gcc
>>Info manual.  It contains a full list of the supported CPU-TYPE values
>>for the -mtune=CPU-TYPE option.  The -march=CPU-TYPE option accepts the
>>same CPU types:
>>
>>    `-march=CPU-TYPE'
>>         Generate instructions for the machine type CPU-TYPE.  The
>>         choices for CPU-TYPE are the same as for `-mtune'.  Moreover,
>>         specifying `-march=CPU-TYPE' implies `-mtune=CPU-TYPE'.
>
> Hello
> Out of curiosity, what is the optimal "-march=" value to use for the
> new Atom D510 CPU: http://ark.intel.com/Product.aspx?id=43098 ?

I'm not sure.  'nocona' seems a pretty close match:

    _nocona_
          Improved version of Intel Pentium4 CPU with 64-bit
          extensions, MMX, SSE, SSE2 and SSE3 instruction set
          support.

Without actually trying -march=nocona on one of these I can't
tell for sure if it is 'optimal' or not though.