[PATCH, middle-end, i386]: reciprocal rsqrt pass + full recip x86 backend support

[Richard Guenther]

On 6/15/07, Paolo Bonzini <bonzini@gnu.org> wrote:
>
> > That said, there is a whole bunch of applications that would kill for
> > -mrecip, even for 11bit ones. Games are one of them, for sure ;)
>
> What about -mrecip=0/1/2 for the number of NR steps? Or would two steps
> be slower than divss?

Two NR steps don't make sense, they wouldn't improve accuracy because of the
extra roundings we get for the NR.  And of course it would be slower.

Richard.