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In subpixel filters, prefetched source data, unrolled loops,
and interleaved instructions.

In HORIZx4, integrated the idea in Scott's CL (commit:
d22a504d), which was suggested by
Erik/Tamar from Intel. Further tweaking was done to combine row 0,
2, and row 1, 3 in registers to do more 2-row-in-1 operations until
the last add.

Test showed a ~2% decoder speedup.

Change-Id: Ib53d04ede8166c38c3dc744da8c6f737ce26a0e3

Interleaved the instructions, reduced register dependency, and
prefetched the source data. This improved the decoder speed
by 0.6% - 2%.

Change-Id: I568067aa0c629b2e58219326899c82aedf7eccca

near is a key word, changed to use nearmv instead.

Change-Id: Ib54438c431b2b2521a62fc7b61a9c127dd7bc01e

Make encoder skip rectangular partition check in speed 1 and above,
when early termination was triggered in partition split.
Thanks Guillaume (gmartres@) for catching this issue.

This change makes bus_cif at 2000kbps speed 1 runtime goes down from
25612ms to 23438ms (about 9% speed-up), at the expense of -0.235%
performance down.

Change-Id: I98613fad081a261d30d5fa206f934ca70601c180

Change-Id: I7380a089105f658257bbb3e30a525da168e76952

We don't need these functions anymore. The only one which was actually
used is vp9_add_constant_residual_32x32. Addition of
vp9_short_idct32x32_1_add eliminates this single usage. SSE2 optimized
version of vp9_short_idct32x32_1_add will be added in the next patch set,
right now it is only C implementation. Now we have all idct functions
implemented in a consistent manner.

Change-Id: I63df79a13cf62aa2c9360a7a26933c100f9ebda3

* changes:
  fixed cpp lint issue in vp9_postproc_x86
  nolintify intrinsic idct file

* changes:
  cpplint issues in vp9_filter.h
  cpplint issues with onyxc_int.h

* changes:
  fixed cpplint issue with vp9_scale.h
  vp9_entropymv.c cpplint issues resolved
  cpplint fixes to debug modes
  cpplint issues in vp9_onyx.h
  cpplint issues resolved in vp9_dx_iface.c

This patch deletes the variance based speed three partitioning.
Speed 3 now uses the same partitioning method as speed 2
but with some stricter conditions.

The speed and quality are now somewhere between speeds 2 and 4
whereas before it was worse in both than speed 4.

Change-Id: Ia142e7007299d79db3ceee6ca8670540db6f7a41

Change-Id: I4e163cc4ce9ec2f3a5a8b9da478049c71b08d71f

Change-Id: I8b496191c6a60a60a52c929adca305db47058a84

Change-Id: I97bf241c0d981721cc74a50be47c9db8a00f6be3

Change-Id: I442609f689aa9381e1e208012305cf62a6b31eee

Change-Id: I07fbb32d5cee0003d04b2369cfafcb03c371cd4f

Change-Id: If6a7a8c48fefc69349c792d8ed52a6e1d374e46e