On Wed, 15 May 2013 16:59:57 +0200
yac <yac@gentoo.org> wrote:

> Hi,
> 
> I was recently investigating what cpu flags do I have and how does it
> work. I have put what I have so far at [1]. 
> 
> So I thought I let you know in case someone wants to chip in.
> 
> [1] https://github.com/yaccz/cufd

I've seen gcc -Q --help=target giving false results before due to the way that
options are parsed and some flags that set other flags not getting processed on
the --help code path.  The second option you list is better.

-native doesn't set 3dnow, mmx, sse, sse2, sse3, ssse3 or sse4a.  I'm guessing
they're just handed through the -march setting.

sys-apps/cpuid is awesome.

MMX2/MMXEXT still confuses me.


-- 
Ryan Hill                        psn: dirtyepic_sk
   gcc-porting/toolchain/wxwidgets @ gentoo.org

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