Revised the instruction_pointer to return the canonical ip and 
ia64_do_profile() to adjust the resulting ip value for the histogram.

-Will

David Mosberger wrote:
>>>>>>On Tue, 26 Aug 2003 17:51:15 -0400, Will Cohen <wcohen@redhat.com> said:
>>>>>
> 
>   Will> I have revised the patch based on the comments below: 1) use
>   Will> ip instead of eip 2) multiply ri by 4, to get more compact
>   Will> histograms
> 
> Hmmh, I'm not sure I like this patch better.  Like I mentioned in the
> earlier mail, it does make sense to encode the slot number in bits 0
> and 1 for instruction_pointer().  That is the canonical representation
> used by IA-64 Linux (and ELF, gdb, etc.).  The traditional histogram
> is a special case, because there it is more useful to get the slot
> number bits close to the bundle-address bits, so I think we should
> special-case this in ia64_do_profile() instead.  Perhaps something
> along the lines of:
> 
> 	ip = instruction_pointer(regs);
> 	/* for histogram, encode slot bits in address bits 2 and 3: */
> 	slot = ip & 3;
> 	ip = (ip & ~3UL) + 4*slot;
> 
>   --david