[Liboil] idct8x8_s16_mmx seems kind of broken...
Adam D. Moss
adam at gimp.org
Sun Dec 18 05:58:37 PST 2005
Adam D. Moss wrote:
> I'm using the oil_idct8x8_s16() function and I find
> that when liboil selects idct8x8_s16_mmx, the artifacts
> are pretty bad (see attached images), almost regardless
> of the distribution or strength of the DCT coefficients.
> idct8x8_s16_ref is very nearly as fast here and gives
> perfect results as far as I'm concerned (bit-identical to
> idct8x8_f64_c for my tests).
P.S: This is CVS liboil compiled with GCC 4.0.1 - thanks
for the recent zigzag fix by the way, I thought I was
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