fdct8x8_test: add NEON functions

FwdTrans8x8HT is disabled as the tests currently fail.

note not all functions have NEON implementations:
- fdct8x8/fht8x8

Change-Id: I028bdec9a21eaaee2c5865470ab179aac403540e
diff --git a/test/fdct8x8_test.cc b/test/fdct8x8_test.cc
index 98aabe6..6f2d7d1 100644
--- a/test/fdct8x8_test.cc
+++ b/test/fdct8x8_test.cc
@@ -313,6 +313,20 @@
         make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_c, 2),
         make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_c, 3)));
 
+#if HAVE_NEON
+INSTANTIATE_TEST_CASE_P(
+    NEON, FwdTrans8x8DCT,
+    ::testing::Values(
+        make_tuple(&vp9_fdct8x8_c, &vp9_idct8x8_64_add_neon, 0)));
+INSTANTIATE_TEST_CASE_P(
+    DISABLED_NEON, FwdTrans8x8HT,
+    ::testing::Values(
+        make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_neon, 0),
+        make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_neon, 1),
+        make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_neon, 2),
+        make_tuple(&vp9_fht8x8_c, &vp9_iht8x8_64_add_neon, 3)));
+#endif
+
 #if HAVE_SSE2
 INSTANTIATE_TEST_CASE_P(
     SSE2, FwdTrans8x8DCT,