[FFmpeg-devel] [PATCH] SPARC VIS simple_idct
Tue Aug 21 22:35:13 CEST 2007
Here is a patch to add sparc vis optimized simple_idct. Speedwise it is about
halfway between the C and the mlib version, slightly on the faster side.
Although the mlib version is faster, this is more accurate - and I honestly
don't know why it is not faster on the sparc than it is, it should be
according to my estimates, but it is not.
Also, although it's the same algorithm as simple_idct, it might be less
accurate on rare occasions, because of the primitive slow split 8+8 bit
multply operation in VIS. I am hoping the idct won't overflow, too.
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