[Mesa-dev] RFC: mesa/st dynamic sampler support in tgsi

[Ilia Mirkin]

On Tue, Aug 5, 2014 at 4:14 PM, Bryan Cain <bryancain3 at gmail.com> wrote:
> On Mon, Aug 4, 2014 at 11:54 PM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>
>> Another apporach I've tried is to just use a TEMP register as the
>> indirect offset here. Unfortunately this gets destroyed by
>> st_glsl_to_tgsi's various optimizations which assume that temp
>> registers can't be reladdr's and so messes up the values. I started
>> adding support for that, but then quickly realized that was probably
>> not the right thing to do.
>>
>> So... should I increase the number of address registers to 1? Or is
>> there some other simple approach that I'm missing?
>>
>> Thanks,
>>
>>   -ilia
>
>
> The problem you are having with the optimizations in glsl_to_tgsi is
> because, as you say, it doesn't check the reladdr fields when calculating
> live intervals.  I'm currently in the middle of reworking the live interval
> calculation - if you don't mind waiting a day or two for me to finish the
> patch set and send it to the list, I can add that change to the reworked
> function in the patch set.

I can certainly wait a little while. However from everything I can
tell, all current reladdr's are in the ADDR register file, so perhaps
I should just stick with that?