Hi Rodrigo,
Thank you very much for providing that information in a precise manner.
Às 07:16 de 05/05/21, Rodrigo Vivi escreveu:
Hi Andre,
I'm not familiar with the sample c message optimization.
Probably Ken can comment.
However I could check the internal spec here and I saw this bit
only
Hello,
Yes, that bit only exists on Haswell. On Haswell, sample_c operations
were processed at 1 pixel/clock unless you set that bit, in which case
they get processed at 4 pixels/clock. The downside is that it breaks
some obscure media feature that apparently no one used.
Broadwell and later
Hi Andre,
I'm not familiar with the sample c message optimization.
Probably Ken can comment.
However I could check the internal spec here and I saw this bit
only exists with this meaning in Haswell.
For all the other platforms, including Broadwell it got re-purposed with
a different meaning and
