disable vp9_iht8x8_64_add_neon

cherry picked from:
commit 0685ec767ce641baaf3ac8d5e24b1e68ab1b110b
Author: James Zern <jzern@google.com>
Date:   Sat Mar 3 12:47:24 2018 -0800

this causes test vector failures

BUG=webm:1403

Change-Id: I7d37a05fbf4641ea352c947053aa4eaeb7f5c318

test/dct_test.cc

@@ -793,15 +793,6 @@ const DctParam neon_ht_tests[] = {
              &highbd_iht_wrapper<vp9_highbd_iht4x4_16_add_neon>, 4, 3,
              VPX_BITS_12, 2),
 #endif  // CONFIG_VP9_HIGHBITDEPTH
-  make_tuple(&vp9_fht8x8_c, &iht_wrapper<vp9_iht8x8_64_add_neon>, 8, 0,
-             VPX_BITS_8, 1),
-  make_tuple(&vp9_fht8x8_c, &iht_wrapper<vp9_iht8x8_64_add_neon>, 8, 1,
-             VPX_BITS_8, 1),
-  make_tuple(&vp9_fht8x8_c, &iht_wrapper<vp9_iht8x8_64_add_neon>, 8, 2,
-             VPX_BITS_8, 1),
-  make_tuple(&vp9_fht8x8_c, &iht_wrapper<vp9_iht8x8_64_add_neon>, 8, 3,
-             VPX_BITS_8, 1),
-
   make_tuple(&vp9_fht4x4_c, &iht_wrapper<vp9_iht4x4_16_add_neon>, 4, 0,
              VPX_BITS_8, 1),
   make_tuple(&vp9_fht4x4_c, &iht_wrapper<vp9_iht4x4_16_add_neon>, 4, 1,

test/fdct8x8_test.cc

@@ -675,7 +675,9 @@ INSTANTIATE_TEST_CASE_P(NEON, FwdTrans8x8DCT,
                         ::testing::Values(make_tuple(&vpx_fdct8x8_neon,
                                                      &vpx_idct8x8_64_add_neon,
                                                      0, VPX_BITS_8)));
-#if !CONFIG_VP9_HIGHBITDEPTH
+// TODO(linfengz): reenable these functions once test vector failures are
+// addressed.
+#if 0   // !CONFIG_VP9_HIGHBITDEPTH
 INSTANTIATE_TEST_CASE_P(
     NEON, FwdTrans8x8HT,
     ::testing::Values(

vp9/common/vp9_rtcd_defs.pl

@@ -68,7 +68,7 @@ if (vpx_config("CONFIG_EMULATE_HARDWARE") ne "yes") {
   # Note that there are more specializations appended when
   # CONFIG_VP9_HIGHBITDEPTH is off.
   specialize qw/vp9_iht4x4_16_add neon sse2/;
-  specialize qw/vp9_iht8x8_64_add neon sse2/;
+  specialize qw/vp9_iht8x8_64_add sse2/;
   specialize qw/vp9_iht16x16_256_add sse2/;
   if (vpx_config("CONFIG_VP9_HIGHBITDEPTH") ne "yes") {
     # Note that these specializations are appended to the above ones.