nasm does not accept x64

yasm has accepted (and appears to prefer) win64 at least as far back as
1.0.0:
http://yasm.tortall.net/releases/Release1.0.0.html

Change-Id: Ied881b1df0570da256b1bd7e131e7817e47f768f

Set num_inter_modes based on ref_mode_set_svc, which is
smaller set than ref_mode_set (which may use alt-ref).

No change in behavior.

Change-Id: I31169bb09028db230552c6fca0a86959d1ade692

Avoids duplicate computation of UV predictor.

Bit-exact when static_threshold is zero.
Small/neutral difference on RTC set with nonzero static_threshold
(since UV predictor won't be skipped with this change).

Small speed gain, ~1-2%, at speed 8.

Change-Id: Iba8d22a307768b391e29d63c9826aac5a4d9c285

this is only meant for testing. along with --enable-experimental
--enable-spatial-svc require VPX_TEST_SPATIAL_SVC to be defined rather
than bumping the encoder ABI.

Change-Id: I7f34d9f60300fa31ccf22e1a4aa619392c391b2e

Update the prev_partition on early exits in
choose_partitioning().

Change-Id: I382ffcab8e647c00b14283d15c3dd11bb0ac6f50

* changes:
  vp8: [loongson] optimize regular quantize v2.
  vp8: [loongson] optimize vp8_short_fdct4x4_mmi v2.

For 1 pass cbr SVC: GOLDEN is the spatial reference,
better not to check for encoder_breakout on this reference.

Small positive ~0.075% (mostly neutral) gain in avgPSNR/SSIM metrics.
No observed change in encoder speed.

Change-Id: Ib337f16d6771105bf06384c6a23ad047fc690418

Make condition explicit on non_reference_frame.

No change in behavior.

Change-Id: Iec5068bccd93c7c7be67634c5c090580b2dbb20d

Change-Id: Ie60381a0c6ee01f828cd364a43f01517f4cb03e9

1. Optimize the memset with mmi.
2. Optimize macro REGULAR_SELECT_EOB.

Change-Id: Icd9c866b0e6aef08874b2f123e9b0e09919445ff

Change-Id: I638507b360c71489ab0e87bd558d2719ad995333

Optimize the calculate process of a,b,c,d.

Change-Id: I81717e47bc988ace1412d478513e7dd3cb6b0cc9

only output short usage to stderr on error, with --help use stdout

Change-Id: I7089f3bca829817e14b14c766f4f3eaee6f54e5c

Change-Id: I24e1741c00f9514647c7db2758a7ababd4e96932

Which cause failed case:
1. MMI/VpxSubpelVarianceTest.Ref/6
2. MMI/VpxSubpelVarianceTest.Ref/7
3. MMI/VpxSubpelVarianceTest.ExtremeRef/6
4. MMI/VpxSubpelVarianceTest.ExtremeRef/7

Change-Id: I122ca20089e14ac324edd61295cf8f506e06afc8

Use (width * height) for setting downsampling filter type.

Change-Id: If4acfde7ff9339e0584155f8a4d15b2f134211f2

Change-Id: I9f95f47bc7ecbb7980f21cbc3a91f699624141af

For the case when the number of temporal layers > 1,
the buffer levels (starting/optimal_buffer_level,
and maximum_buffer_size) were not scaled properly.

In vp9_update_layer_context_change_config():
when setting the layer-buffer levels, fix is to scale
the layer-target_bandwidth by the target_bandwidth
(which is the full stream bandwidth) instead of the
spatial_layer_target.

This is needed because prior to the call
vp9_update_layer_context_change_config(), set_rc_buffer_sizes()
is called which sets the buffer levels based on target bandwidth
(which is the full bandwidth for the SVC stream).

This fix properly sets the layer-buffer levels based on the
layer-bandwidth, and leads to better rate targeting.

Small/neutral change in avgPSNR/SSIM metrics on RTC set.

Change-Id: Ic0f4f7f3487c37b9a9adb4781ae5edfed7140a57

Control Flow Integrity [1] indirect call checking verifies that function
pointers only call valid functions with a matching type signature. This
change eliminates function pointer casts to make libvpx CFI-safe.

[1] https://www.chromium.org/developers/testing/control-flow-integrity

Change-Id: I7e08522d195a43c88cda06fa20414426c8c4372c

Clean up some prints.

Change-Id: I199350e34a8b6fbff9601fcbd11ec68d24da5073

For reference frames: enable scale partition for
superblocks with low source sad or if bsize on lower-resoln
is at least 32x32.

Keep feature disabled for base temporal layer.

Small regression in avgPNSR/SSIM metrics, ~0.5-1%.
Speedup ~2-3% on mac for SVC (3 spatial/3 temporal layers) at speed 7.

Change-Id: I5987eb7763845b680059128b538bb5188be0cca5

Change-Id: I4cb878600038066513ab73f3658990d1245ff2fb

Change-Id: If8b91aaa883c01107f0ea3468139fa24cfb301d2