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x86: fix overflow in h264 8x8 planar prediction

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Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-01-24 23:24:28 +00:00
parent e63dd5fb04
commit 80944df720
1 changed files with 4 additions and 4 deletions
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8
libavcodec/x86/h264_intrapred.asm
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@ -637,10 +637,6 @@ cglobal pred8x8_plane_%1, 2, 7, %2
%endif
paddw m0, m1 ; sum of H coefficients
pmullw m0, [pw_17]
paddw m0, [pw_16]
psraw m0, 5
lea r4, [r0+r2*4-1]
lea r3, [r0 -1]
add r4, r2
@ -694,6 +690,10 @@ cglobal pred8x8_plane_%1, 2, 7, %2
shl r3, 4
movd r1d, m0
movsx r1d, r1w
imul r1d, 17
add r1d, 16
sar r1d, 5
movd m0, r1d
add r1d, r5d
sub r3d, r1d
add r1d, r1d