Implement the general blending of ARGB32_pm with SSSE3

SSSE3 provides two tools to improve the blending speed over SSE2:
-palignr
-byte permutation

The alignement is enforced on src and dst with palignr to always make
aligned access.
The extraction of the alpha mask is done with a byte permutation in
order to save two instructions per cycle.

On Atom, this patch gives between 0% (aligned src) to 10% of
improvement (unaligned 4 and 12 bytes).

On Core 2, this patch gives consistently 8% to 10% of improvement
for every miss-alignment.

Reviewed-by: Samuel Rødal

0 files changed, 0 insertions, 0 deletions