[Fwd: GCC2C compiler/converter]

[Alexey Starovoytov]

Hi David,

> > > This converter will be very helpful to developers who use GCC but want
> > > enhanced performance on UltraSPARC platforms, particularly the US-III.
> > > GCC 3.x has no support for US3 prefetch cache or other US3 specific
> > > features. The number of supported optimizations in GCC is significantly
> > > lower than in Forte. This converter delivers the best from both.

> Not true, loop prefetch for Ultra-I/II/III exists even in the current
> 3.1 sources.  The mainline even has an Ultra-III specific scheduler
> description.

GCC 3.1 doesn't see a difference between Ultra 1, 2 and 3.
Some commercial applications saw 2x gains just recompiling from US2 to US3.

>
> It's also not true that the "number of supported optimizations in GCC is
> significantly lower than in Forte".

That's what the Nullstone bench 4.7 said:
GCC - 68%
Forte - 85%

Best regards,
Alexey.