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I have some problem modifying xvidcore src. I noticed that simple logarithms and shift operations doesn't work fine after some asm function, such as bgr_to_yv12_mmx. In this particular case, those math functions return totally wrong values.
Anybody knows why?
Thx
Originally posted by sempronio
I have some problem modifying xvidcore src. I noticed that simple logarithms and shift operations doesn't work fine after some asm function, such as bgr_to_yv12_mmx. In this particular case, those math functions return totally wrong values.
lt;educated guessgt;
Missing emms instruction after it's done using the mmx registers? (MMX and FPU don't mix well without emms...)
lt;/educated guessgt;
np: Autechre - Part 1 (XLTronic Radio 25.01.05)
Originally posted by Leak
lt;educated guessgt;
Missing emms instruction after it's done using the mmx registers? (MMX and FPU don't mix well without emms...)
lt;/educated guessgt;That'd result in an (caught / not caught) exception, not in wrong results.
Maybe treating unsigned 64bit ints as 32bit ints could give you wrong results - and the other way around, also 16bit ints as 32 bits ints would give weird results.
Cheers
Koepi |
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Post at 2011-4-15 15:15
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