[Mesa-dev] [PATCH 1/7] gallium: add CONSTBUF type to tgsi_file_type

Timothy Arceri tarceri at itsqueeze.com
Tue Aug 22 22:55:55 UTC 2017

On 23/08/17 00:56, Ilia Mirkin wrote:
> On Tue, Aug 22, 2017 at 10:51 AM, Roland Scheidegger <sroland at vmware.com> wrote:
>> I am probably missing something here, but why do you need a new register
>> file? Since you couldn't use LOAD with TGSI_FILE_CONSTANT before, can't
>> you just allow LOAD with TGSI_FILE_CONSTANT and achieve the same thing?
>> Or do you need to know how it's going to be accessed in advance?
> With bindless, LOAD can take a CONST I believe [which contains the
> value of the bindless id]. I think it's nice to keep those concepts
> separate... having CONST sometimes mean the value and other times mean
> the address is a bit weird. This way CONSTBUF[0] is the address of the
> 0th constbuf.

Yeah. I think we also may need another type for bindless as I'm planning 
to use TGSI_FILE_CONSTANT for regular uniforms. The plan is to use LOAD 
for supporting packed uniforms rather than padding everything to vec4.

>    -ilia

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