shader_recompiler: translate Switch 2 task and mesh programs

Mario Kart World draws some of its geometry with NVN task and mesh programs
(the task program culls and writes the mesh workgroup count and a payload
to its stage buffer; each mesh workgroup reads it back and writes vertices
and primitives). Add Task and Mesh stages and translate them for
VK_EXT_mesh_shader:

- the ISBE pseudo instruction from the lowering becomes reads and writes
  of an emulated stage buffer: the task's output region is the task
  payload, the mesh output regions live in workgroup memory
- every EXIT of these stages jumps to one final return, so all
  invocations reach the epilogue: a barrier, then OpEmitMeshTasksEXT, or
  OpSetMeshOutputsEXT and a copy of the 32-element vertex and primitive
  groups (lines named by the mesh header's and the pass-through geometry
  header's output maps) to arrayed and per-primitive outputs
- Sirit lacks the two mesh instructions: they are emitted as OpStore
  markers and replaced after assembly
- fragment inputs a mesh program writes per primitive get PerPrimitiveEXT

The captured task and mesh programs of the title translate to SPIR-V that
spirv-val accepts.

0 files changed, 0 insertions, 0 deletions