[ACTIVITY] 2011-03-25

[David Gilbert]

== String routines ==
  * Wrote a thumb optimised strchr
    - As expected it's got nice performance for longer runs but at
sizes <16 bytes it's slower, and a lot of the strchr
calls are very short, so it's probably not of benefit in most cases

      ( https://wiki.linaro.org/WorkingGroups/ToolChain/Benchmarks/InitialStrchr?action=AttachFile&do=get&target=panda-01-strchr-git44154ec-strchr-abs.png
)

  * Wrote a neon-memcpy
    - As previously found with memset, it performs well on A8 but
poorly on A9 - it does however do the case where
the source/destination isn't aligned quite well even on A9 ; the vld1
unaligned case works with relatively little penalty.
     (it performs comparably to the Bionic implementation - mine is a
bit faster on shorter calls, Bionic is better
on longer uses - I think that's because they've got some careful use
of preloads where I have so far got none).


I'm on holiday up to and including 5th April.

Dave