See sample vp90-2-14-resize-fp-tiles-16-8.webm from the vp9 test vector
set to reproduce the issue.
---
libavcodec/x86/vp9itxfm.asm | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavcodec/x86/vp9itxfm.asm b/libavcodec/x86/vp9itxfm.asm
index a9d45a4..9cf0d78 100644
--- a/libavcodec/x86/vp9itxfm.asm
+++ b/libavcodec/x86/vp9itxfm.asm
@@ -1622,7 +1622,9 @@ VP9_IDCT_IDCT_16x16_ADD_XMM avx
PSIGNW m3, [pw_m1] ; m3=out1[w],
m7=t10[w]
SUMSUB_BA w, 2, 6, 1 ; m2=out14[w],
m6=t11[w]
-%if cpuflag(ssse3)
+ ; unfortunately, the code below overflows in some cases, e.g.
+ ;
http://downloads.webmproject.org/test_data/libvpx/vp90-2-14-resize-fp-tiles-16-8.webm
+%if 0; cpuflag(ssse3)
SUMSUB_BA w, 7, 6, 1
pmulhrsw m7, [pw_11585x2] ; m7=out6[w]
pmulhrsw m6, [pw_11585x2] ; m6=out9[w]
--
2.1.2
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