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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2011-01-15 22:00:44 +0000 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2011-01-15 22:00:44 +0000 |
| commit | 1b3e43e4fdbfe5b6ce10d19ed32a4f20fab76f5a (patch) | |
| tree | 76653428bc45904914269c2c212cb912ba699a98 /libavcodec | |
| parent | b1779800c4f5447891778fe54c5d950dd315d089 (diff) | |
| download | ffmpeg-1b3e43e4fdbfe5b6ce10d19ed32a4f20fab76f5a.tar.gz | |
Fix overflow in pred16x16_plane x86 simd code. Fixes issue 2547.
Originally committed as revision 26381 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/x86/h264_intrapred.asm | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm index 52e691df8a..afe6426a3f 100644 --- a/libavcodec/x86/h264_intrapred.asm +++ b/libavcodec/x86/h264_intrapred.asm @@ -344,28 +344,6 @@ cglobal pred16x16_plane_%3_%1, 2, 7, %2 %endif paddw m0, m1 ; sum of H coefficients -%ifidn %3, h264 - pmullw m0, [pw_5] - paddw m0, [pw_32] - psraw m0, 6 -%elifidn %3, rv40 - pmullw m0, [pw_5] - psraw m0, 6 -%elifidn %3, svq3 - movd r3d, m0 - movsx r3, r3w - test r3, r3 - lea r4, [r3+3] - cmovs r3, r4 - sar r3, 2 ; H/4 - lea r3, [r3*5] ; 5*(H/4) - test r3, r3 - lea r4, [r3+15] - cmovs r3, r4 - sar r3, 4 ; (5*(H/4))/16 - movd m0, r3d -%endif - lea r4, [r0+r2*8-1] lea r3, [r0+r2*4-1] add r4, r2 @@ -468,8 +446,29 @@ cglobal pred16x16_plane_%3_%1, 2, 7, %2 movzx r3, byte [r3+r2*2 ] lea r3, [r3+r4+1] shl r3, 4 + movd r1d, m0 movsx r1d, r1w +%ifnidn %3, svq3 +%ifidn %3, h264 + lea r1d, [r1d*5+32] +%else ; rv40 + lea r1d, [r1d*5] +%endif + sar r1d, 6 +%else ; svq3 + test r1d, r1d + lea r4d, [r1d+3] + cmovs r1d, r4d + sar r1d, 2 ; H/4 + lea r1d, [r1d*5] ; 5*(H/4) + test r1d, r1d + lea r4d, [r1d+15] + cmovs r1d, r4d + sar r1d, 4 ; (5*(H/4))/16 +%endif + movd m0, r1d + add r1d, r5d add r3d, r1d shl r1d, 3 |