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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-08-25 19:04:33 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-08-25 19:04:33 +0000 |
| commit | b696a4c91d5f2b30310eb762beeb225292d94b44 (patch) | |
| tree | a150c8cb0eb0fc7047226e50c07a9a563a75d607 | |
| parent | 9caa1cccb991260add5abba9d26eb2c8b4e97d5c (diff) | |
| download | ffmpeg-b696a4c91d5f2b30310eb762beeb225292d94b44.tar.gz | |
avoid an overflow in the 1 horizontal lifting step
Originally committed as revision 10225 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/i386/snowdsp_mmx.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/libavcodec/i386/snowdsp_mmx.c b/libavcodec/i386/snowdsp_mmx.c index 4fad6f81eb..6deaad2336 100644 --- a/libavcodec/i386/snowdsp_mmx.c +++ b/libavcodec/i386/snowdsp_mmx.c @@ -43,7 +43,7 @@ void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, int width){ asm volatile( "pcmpeqd %%xmm7, %%xmm7 \n\t" "psllw $15, %%xmm7 \n\t" - "psrlw $13, %%xmm7 \n\t" + "psrlw $14, %%xmm7 \n\t" ::); for(; i<w_l-15; i+=16){ asm volatile( @@ -55,14 +55,14 @@ void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, int width){ "paddw %%xmm5, %%xmm6 \n\t" "movdqa %%xmm2, %%xmm0 \n\t" "movdqa %%xmm6, %%xmm4 \n\t" - "paddw %%xmm2, %%xmm2 \n\t" - "paddw %%xmm6, %%xmm6 \n\t" + "psraw $1, %%xmm0 \n\t" + "psraw $1, %%xmm4 \n\t" "paddw %%xmm0, %%xmm2 \n\t" "paddw %%xmm4, %%xmm6 \n\t" "paddw %%xmm7, %%xmm2 \n\t" "paddw %%xmm7, %%xmm6 \n\t" - "psraw $3, %%xmm2 \n\t" - "psraw $3, %%xmm6 \n\t" + "psraw $2, %%xmm2 \n\t" + "psraw $2, %%xmm6 \n\t" "movdqa (%0), %%xmm0 \n\t" "movdqa 16(%0), %%xmm4 \n\t" "psubw %%xmm2, %%xmm0 \n\t" @@ -111,7 +111,7 @@ void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, int width){ i = 0; asm volatile( - "psllw $1, %%xmm7 \n\t" + "psllw $2, %%xmm7 \n\t" ::); for(; i<w_l-15; i+=16){ asm volatile( @@ -228,7 +228,7 @@ void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, int width){ asm volatile( "pcmpeqw %%mm7, %%mm7 \n\t" "psllw $15, %%mm7 \n\t" - "psrlw $13, %%mm7 \n\t" + "psrlw $14, %%mm7 \n\t" ::); for(; i<w_l-7; i+=8){ asm volatile( @@ -238,14 +238,14 @@ void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, int width){ "paddw 10(%1), %%mm6 \n\t" "movq %%mm2, %%mm0 \n\t" "movq %%mm6, %%mm4 \n\t" - "paddw %%mm2, %%mm2 \n\t" - "paddw %%mm6, %%mm6 \n\t" + "psraw $1, %%mm2 \n\t" + "psraw $1, %%mm6 \n\t" "paddw %%mm0, %%mm2 \n\t" "paddw %%mm4, %%mm6 \n\t" "paddw %%mm7, %%mm2 \n\t" "paddw %%mm7, %%mm6 \n\t" - "psraw $3, %%mm2 \n\t" - "psraw $3, %%mm6 \n\t" + "psraw $2, %%mm2 \n\t" + "psraw $2, %%mm6 \n\t" "movq (%0), %%mm0 \n\t" "movq 8(%0), %%mm4 \n\t" "psubw %%mm2, %%mm0 \n\t" @@ -288,7 +288,7 @@ void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, int width){ i = 1; b[0] = b[0] + (((2 * ref[1] + W_BO) + 4 * b[0]) >> W_BS); asm volatile( - "psllw $1, %%mm7 \n\t" + "psllw $2, %%mm7 \n\t" ::); for(; i<w_l-7; i+=8){ asm volatile( |