[Mesa-dev] [PATCH 00/22] Nir support for Nouveau

[Karol Herbst]

uhm, actually that should have been marked as a RFC, sorry for that.

On Thu, Dec 21, 2017 at 4:51 PM, Karol Herbst <kherbst at redhat.com> wrote:
> Plans are to get SPIR-V support for Nouveau with a cheap way. Before that I
> was looking into Pierres work on his direct SPIR-V to nvir pass and seemed
> much more complicated than doing NIR to nvir.
>
> In the end we still plan to get Compute support through SPIR-V and my hope is
> to get that piped through NIR, so that a lot of other drivers could benefit
> from this as well.
>
> Stuff up to GLSL 1.30 should work (just 2 piglit fails up to that), some games
> run as well (truth is, I only checked one, but I expect that more will run).
> Usually I took the add-stuff-until-piglit-test-passes approach so a lot of
> details are still missing.
>
> But nevertheless I would like to get some feedback on the work and suggestions
> for improving this work.
>
> To use NIR just set NV50_PROG_USE_NIR=1 for a mesa DEBUG build. I plan to move
> it to a non debug variable for the next series.
>
> Features I want to work next on:
> * Geometry shaders
> * UBOs
>
> ./piglit run -x glx -x egl -x streaming-texture-leak -x max-texture-size tests/gpu.py:
> [26073/26073] skip: 1574, pass: 13451, warn: 9, fail: 5287, crash: 5752
>
> Note: a lot of crashes are geometry/tesselation stuff hitting asserts.
>
> Karol Herbst (22):
>   nvir: print the shader type when dumping headers
>   nvir: move common converter code in base class
>   nvc0: add support for NIR
>   nvc0/debug: add env var to make nir default
>   nvir/nir: run some passes to make the conversion easier
>   nvir/nir: track defs and provide easy access functions
>   nvir/nir: add nir type helper functions
>   nvir/nir: implement CFG handling
>   nvir/nir: implement nir_load_const_instr
>   nvir/nir: add skeleton for nir_intrinsic_instr
>   nvir/nir: implement nir_alu_instr handling
>   nvir/nir: implement nir_intrinsic_load_uniform
>   nvir/nir: implement nir_intrinsic_store_output
>   nvir/nir: implement nir_intrinsic_load_input
>   nvir/nir: run assignSlots
>   nvir/nir: parse NIR shader info
>   nvir/nir: implement intrinsic_discard(_if)
>   nvir/nir: implement loading system values
>   nvir/nir: implement nir_ssa_undef_instr
>   nvir/nir: implement nir_instr_type_tex
>   nvir/nir: implement vote
>   nvir/nir: implement variable indexing
>
>  src/gallium/drivers/nouveau/Makefile.sources       |    3 +
>  src/gallium/drivers/nouveau/codegen/nv50_ir.cpp    |    3 +
>  src/gallium/drivers/nouveau/codegen/nv50_ir.h      |    1 +
>  .../nouveau/codegen/nv50_ir_from_common.cpp        |  145 ++
>  .../drivers/nouveau/codegen/nv50_ir_from_common.h  |   59 +
>  .../drivers/nouveau/codegen/nv50_ir_from_nir.cpp   | 2009 ++++++++++++++++++++
>  .../drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp  |  146 +-
>  src/gallium/drivers/nouveau/meson.build            |   12 +-
>  src/gallium/drivers/nouveau/nvc0/nvc0_program.c    |   17 +-
>  src/gallium/drivers/nouveau/nvc0/nvc0_screen.c     |   53 +-
>  src/gallium/drivers/nouveau/nvc0/nvc0_state.c      |   24 +-
>  11 files changed, 2321 insertions(+), 151 deletions(-)
>  create mode 100644 src/gallium/drivers/nouveau/codegen/nv50_ir_from_common.cpp
>  create mode 100644 src/gallium/drivers/nouveau/codegen/nv50_ir_from_common.h
>  create mode 100644 src/gallium/drivers/nouveau/codegen/nv50_ir_from_nir.cpp
>
> --
> 2.14.3
>