https://gitlab.freedesktop.org/mesa/mesa/merge_requests/189
Here's a series that ports st/mesa's built-in shaders for various things from TGSI to NIR. For drivers which prefer NIR, we use the new direct versions rather than using tgsi_to_nir. I've tested Piglit on radeonsi using R600_DEBUG=nir, and it appears there are no regressions. I've also used these patches in Iris. I have not tested them on vc4/v3d or freedreno, however. src/mesa/Makefile.sources | 1 + src/mesa/meson.build | 1 + src/mesa/state_tracker/st_cb_clear.c | 80 +++++++++++-- src/mesa/state_tracker/st_cb_drawpixels.c | 177 +++++++++++++++++++++++----- src/mesa/state_tracker/st_cb_drawtex.c | 69 +++++++++-- src/mesa/state_tracker/st_cb_readpixels.c | 1 + src/mesa/state_tracker/st_glsl_to_nir.cpp | 46 ++++---- src/mesa/state_tracker/st_nir.h | 18 +++ src/mesa/state_tracker/st_nir_builtins.c | 136 +++++++++++++++++++++ src/mesa/state_tracker/st_pbo.c | 190 +++++++++++++++++++++++++++++- 10 files changed, 648 insertions(+), 71 deletions(-)
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