[PATCH 0/4] Tune and tweak memmove/wordcopy code for Powerpc

[Will Schmidt <will_schmidt at vnet dot ibm dot com>]

The following series copies, tunes and tweaks the implementation of memove
and wordcopy functions for powerpc, with focus on power6 and power7.

The "Call memcpy when appropriate" optimization (4/4) could apply to other
architectures generically; but I can not make any claims to how
much improvement (if any) it provides for those archs.

Version 2 changes:
 - Per feedback, Added helper macros to the power6 versions of wordcopy.c
before populating the power7 subdir with copies of those files.
 - Eliminated the now redundant switch() statement calling the macro, in turn
eliminating the need for v1 patch 'convert switch to if-then-else'.
 - Dropped the v1 patch 'preload srcp values' patch (for now).  It was not
providing measurable improvement.

Will Schmidt (4):
      [Powerpc] tune/optimize memmove/wordcopy. Add helper macro to call MERGE.
      [Powerpc] tume/optimize memmove/wordcopy. Remove switch statement.
      [Powerpc] tune/optimize memmove/wordcopy. Populate power7 files.
      [Powerpc] tune/optimize memmove/wordcopy. Call memcpy when appropriate.


 sysdeps/powerpc/memmove.c                   |  120 +++++++++++++
 sysdeps/powerpc/powerpc32/power6/wordcopy.c |  131 +++-----------
 sysdeps/powerpc/powerpc32/power7/wordcopy.c |  218 +++++++++++++++++++++++
 sysdeps/powerpc/powerpc64/power6/wordcopy.c |  256 +++------------------------
 sysdeps/powerpc/powerpc64/power7/wordcopy.c |  218 +++++++++++++++++++++++
 5 files changed, 619 insertions(+), 324 deletions(-)
 create mode 100644 sysdeps/powerpc/memmove.c
 create mode 100644 sysdeps/powerpc/powerpc32/power7/wordcopy.c
 create mode 100644 sysdeps/powerpc/powerpc64/power7/wordcopy.c

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