[mythtv-commits] mythtv commit: r7657 by danielk

mythtv at cvs.mythtv.org mythtv at cvs.mythtv.org
Mon Oct 31 12:22:50 EST 2005


      Author: danielk
        Date: 2005-10-31 17:22:49 +0000 (Mon, 31 Oct 2005)
New Revision: 7657
   Changeset: http://cvs.mythtv.org/trac/changeset/7657

Modified:

   trunk/mythtv/filters/quickdnr/filter_quickdnr.c

Log:

Fixes #529.

The quickdnr function was using prefetch which is only available
some a subset of MMX capable processors and this was being used 
based on a simple MMX available test.

Also these prefetches are pointless and may even slow down the
code because sequental array accesses are already prefetched at
the T0 level by the processors that support prefetch; the
extra instructions just give the instruction decoder more to
do without any benefit.

I commented them out rather than removing them entirely because
this code might be resynced to from outside MythTV.






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