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Re: gcc -march=nocona -mtune=nocona --help=target

From: Tim Prince <TimothyPrince at sbcglobal dot net>
To: Ian Lance Taylor <iant at google dot com>, Oleg Kravchenko <oleg at kaa dot org dot ua>, gcc-help at gcc dot gnu dot org
Date: Wed, 22 Apr 2009 07:44:57 -0700
Subject: Re: gcc -march=nocona -mtune=nocona --help=target
References: <49EED736.1030505@kaa.org.ua> <m3d4b4ak8w.fsf@google.com> <20090422140419.GA2438@endeed2.ispras.ru>
Reply-to: tprince at computer dot org

Alexander Monakov wrote:
> On Wed, Apr 22, 2009 at 06:30:39AM -0700, Ian Lance Taylor wrote:
>> Oleg Kravchenko <oleg@kaa.org.ua> writes:
>>
>>> Why gcc say what mmx, sse, sse2 is disabled?
>>>
>>> $ gcc -march=nocona -mtune=nocona --help=target
>> They are disabled because you didn't explicitly request them.
>>
>> Ian
> 
> Sorry, Ian, but is this behaviour really intended?  These extensions are
> enabled by gcc/config/i386/i386.c:override_options() for -march=nocona, and if
> one uses -fverbose-asm, they are really listed as enabled there.  IMHO, in
> this situation behaviour of -Q --help=target and -fverbose-asm seems
> contradictory and a bit confusing to the user.
> 

Is prescott still preferred as the 32-bit equivalent to 64-bit nocona?  I
couldn't make out which version is under discussion.  There are too many
product names partly supported without useful distinction

References:
- gcc -march=nocona -mtune=nocona --help=target
  - From: Oleg Kravchenko
- Re: gcc -march=nocona -mtune=nocona --help=target
  - From: Ian Lance Taylor
- Re: gcc -march=nocona -mtune=nocona --help=target
  - From: Alexander Monakov

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