ir3,tu: implement VK_KHR_shader_subgroup_rotate
Add support for the shfl instruction on a6xx+ to implement subgroupRotate.
Note: shfl can also be used to implement (relative) shuffles more efficiently, this will be done in a future MR.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Add support for the shfl instruction on a6xx+ to implement subgroupRotate.
Note: shfl can also be used to implement (relative) shuffles more efficiently, this will be done in a future MR.