On 03/20/2016 08:08 PM, Dave Airlie wrote:
This appears to set some values into some temp register that we never
read from or look at again,
should it be setting something that ExecMask gets set to at machine run time?
just noticed it while trying to work out the various mask for shader images.
My recollection is that it's supposed to disable execution channels for
non-existant vertices. For example, if we only have 3 vertices to
process, the 4th execution channel should be disabled.
But like you say, it doesn't seem to get used. I could do a piglit run
with tgsi_set_exec_mask() nop'd and see what happens...
-Brian
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