[patch]: Add support of new __int128 type for targets having 128-bit integer scalar support

Eric Botcazou ebotcazou@adacore.com
Fri Apr 9 18:03:00 GMT 2010

> I tested it on x86, which doesn't support __int128 as long as sse
> isn't enabled, and for x86_64, which does support 128-bit mode
> (TImode) as it always enables sse.

OK, so in the end __int128 isn't rejected even if MAX_FIXED_MODE_SIZE is 
GET_MODE_BITSIZE (DImode) like on x86-64, and it will be accepted on all 
64-bit platforms whatever their MAX_FIXED_MODE_SIZE setting.

In fact I hadn't realized that scalar_mode_supported_p totally disregards 
MAX_FIXED_MODE_SIZE already.  That's a bit inconsistent, but I'm not sure the 
benefits of fixing it are worth the hassle.

FWIW patch looks good now. :-)

Eric Botcazou

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