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vp9: fix rounding error in idct_8x8_ssse3.

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Ronald S. Bultje 2015-09-05 13:36:56 -04:00
parent ae9344cb9f
commit 086c9b78d4
1 changed files with 1 additions and 2 deletions
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libavcodec/x86/vp9itxfm.asm
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@ -527,10 +527,9 @@ IADST4_FN iadst, IADST4, iadst, IADST4, ssse3
pmulhrsw m2, [pw_6270x2] ; m2=t2a
pmulhrsw m7, m1, [pw_16069x2] ; m7=t7a
pmulhrsw m1, [pw_3196x2] ; m1=t4a
pmulhrsw m5, m3, [pw_9102x2] ; m5=-t5a
pmulhrsw m5, m3, [pw_m9102x2] ; m5=t5a
pmulhrsw m3, [pw_13623x2] ; m3=t6a
SUMSUB_BA w, 5, 1, 4 ; m1=t4a+t5a (t4), m5=t4a-t5a (t5a)
SWAP 1, 5
SUMSUB_BA w, 3, 7, 4 ; m3=t7a+t6a (t7), m7=t7a-t6a (t6a)
SUMSUB_BA w, 1, 7, 4 ; m1=t6a+t5a (t6), m7=t6a-t5a (t5)
pmulhrsw m1, W_11585x2_REG ; m1=t6