On Thu, Mar 29, 2001 at 11:45:39AM -0800, Charles M. Hannum wrote:
> 
> On Thu, Mar 29, 2001 at 11:42:40AM -0800, Charles M. Hannum wrote:
> > 
> > On Thu, Mar 29, 2001 at 11:08:13AM +0100, Richard Earnshaw wrote:
> > > > 
> > > According to the documentation I have, Xscale only predicts B and BL 
> > > instructions, both of which only have pc-relative invariant offsets.  Any 
> > > mis-predicted (or unpredicted) branch takes at least 5 cycles to issue (8 
> > > if the value has to come from memory). [XScale Developers Manual, Table 
> > > 14-4]
> > 
> > So a function return always takes 5 clock cycles??  Was this thing
> > developed by the same group that did the P4, perchance??
> 
> Shit, and another 5 cycles for every PIC function call.  This is gonna
> suck a lot.

Maybe they want to make sure it is only used for embedded applications, not
for general OSes.

Regards,
	-is