[PATCH] powerpc: strstr optimization

[Steven Munroe]

On Thu, 2015-05-21 at 11:08 -0400, Carlos O'Donell wrote:
> On 05/12/2015 04:49 AM, Ondřej Bílka wrote:
> >>> Following function should beat it.
> >>>
> >>> char *strstr (char *s, char *n)
> >>> {
> >>>   if (n[0] == 0)
> >>>     return s;
> >>>   while (s = strchr (s, n[0]))
> >>>     {
> >>>       long i;
> >>>       for (i=1; n[i] && n[i] == s[i]; i++);
> >>>       if (n[i] == 0)
> >>>         return s;
> >>>       s++;
> >>>     }
> >>> }
> >> Calling strchr in a loop is not showing  improvement when compared
> >> to the proposed patch.
> >>>
> > Evidence?
> > 
> 
> I agree with Ondrej here. What tests are you doing to show there is
> no performance improvement? Can we see those tests? Can you contribute
> them to the microbenchmark so other Power vendors can use them against
> their particular hardware to validate performance?
> 

I thought this was addressed with
https://www.sourceware.org/ml/libc-alpha/2015-05/msg00276.html

Which includes results from benchtest/bench-strstr.c.

Why do we need another micro-benchmark for this?