ffmpeg | branch: master | Ronald S. Bultje <rsbul...@gmail.com> | Wed Apr 22 15:48:37 2015 -0400| [3de13d5212b6a0ff146dc0b50e34ee7dbc822eef] | committer: Michael Niedermayer
vp9: remove another optimization branch in iadst16 which causes overflows. See sample vp90-2-14-resize-fp-tiles-16-8.webm from the vp9 test vector set to reproduce the issue. > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3de13d5212b6a0ff146dc0b50e34ee7dbc822eef --- 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] _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
