From: Chris Metcalf <cmetcalf@tilera.com>
Date: Thu, 1 Aug 2013 19:52:17 +0000 (-0400)
Subject: tile: optimize and clean up string functions
X-Git-Tag: v3.12-rc1~120^2~80
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c53c70a90fdce3e7a53a0412abf7cc2b2a645988;p=pandora-kernel.git

tile: optimize and clean up string functions

This change cleans up the string code in a number of ways:

- For memcpy(), fix bug in prefetch and increase distance to 3 lines;
  optimize for unaligned data; do all loads before wh64 to make memcpy
  safe for forward-overlapping calls; etc.  Performance is improved.

- Use new copy_byte() function on tilegx to spread a single byte value
  out into a full word using the shufflebytes instruction.

- Clean up header include ordering to be more canonical, and remove
  spurious #undefs of function names.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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