[patches] Re: SSE min/max instruction support

Jan Hubicka jh@suse.cz
Sat Feb 24 14:40:00 GMT 2001


> > Don't seems to be ready for floats.
> 
> Well, it's used for floats by ia64 and rs6000.
> I assumed it worked.
OK, so suggested way is to use it for x86_64 as well and fix generic
infrastructure?
Note that the definition if min/max for floats is pretty touchy.
SSE defines that for two zeros, always second zero is returned
and for unordered too, so it corresponds to the <
other may define <= equivalent or some other changes.
Perhaps keeping if_then_else is better way and update the ia64/rs6000 respectivly.
What do you think?

Honza
> 
> 
> r~



More information about the Gcc-patches mailing list