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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.
(cherry picked from commit 3de13d5212)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Ronald S. Bultje 2015-04-22 15:48:37 -04:00 committed by Michael Niedermayer
parent 83ee63e7f8
commit b53b6a25e2
1 changed files with 3 additions and 1 deletions
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4
libavcodec/x86/vp9itxfm.asm
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@ -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]