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avcodec/x86/hevc: fix luma 12b overflow 

Signed-off-by: J. Dekker <jdek@itanimul.li>
This commit is contained in:
Ronald S. Bultje 2024-02-25 10:49:35 -05:00 committed by J. Dekker
parent 07cc8f6b3c
commit d6083f503d
1 changed files with 31 additions and 9 deletions
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40
libavcodec/x86/hevc_deblock.asm
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@ -541,19 +541,41 @@ ALIGN 16
add betaq, r13
shr betaq, 3; ((beta + (beta >> 1)) >> 3))
mova m13, [pw_8]
psubw m12, m4, m3 ; q0 - p0
psllw m10, m12, 3; 8 * (q0 - p0)
paddw m12, m10 ; 9 * (q0 - p0)
paddw m10, m12, m12
paddw m12, m10 ; 3 * (q0 - p0)
psubw m10, m5, m2 ; q1 - p1
psllw m8, m10, 1; 2 * ( q1 - p1 )
paddw m10, m8; 3 * ( q1 - p1 )
psubw m12, m10; 9 * (q0 - p0) - 3 * ( q1 - p1 )
paddw m12, m13; + 8
psubw m12, m10 ; 3 * (q0 - p0) - (q1 - p1)
%if %1 < 12
paddw m10, m12, m12
paddw m12, [pw_8]; + 8
paddw m12, m10 ; 9 * (q0 - p0) - 3 * ( q1 - p1 )
psraw m12, 4; >> 4 , delta0
PABSW m13, m12; abs(delta0)
%elif cpuflag(ssse3)
pabsw m13, m12
paddw m10, m13, m13
paddw m13, [pw_8]
paddw m13, m10 ; abs(9 * (q0 - p0) - 3 * ( q1 - p1 ))
pxor m10, m10
pcmpgtw m10, m12
paddw m13, m10
psrlw m13, 4; >> 4, abs(delta0)
psignw m10, m13, m12
SWAP 10, 12
%else
pxor m10, m10
pcmpgtw m10, m12
pxor m12, m10
psubw m12, m10 ; abs()
paddw m13, m12, m12
paddw m12, [pw_8]
paddw m13, m12 ; 3*abs(m12)
paddw m13, m10
psrlw m13, 4
pxor m12, m13, m10
psubw m12, m10
%endif
psllw m10, m9, 2; 8 * tc
paddw m10, m9; 10 * tc