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amd: implement conformant TRUNC_COORD behavior for gfx11

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For testing, the conformant behavior can be enabled by setting
conformant_trunc_coord to true manually and running this to enable
the conformant behavior in hw:
    umr -w *.*.regTA_CNTL2 0x40000

The layer index rounding and TRUNC_COORD resetting workarounds can disabled
in the shader compiler.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21525>
This commit is contained in:
Marek Olšák
2023-01-24 19:15:35 -05:00
committed by Marge Bot
parent 39fefeabee
commit df6380ddc9
11 changed files with 42 additions and 8 deletions
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1
src/amd/vulkan/radv_nir_to_llvm.c
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@@ -907,6 +907,7 @@ ac_translate_nir_to_llvm(struct ac_llvm_compiler *ac_llvm,
ctx.abi.clamp_shadow_reference = false;
ctx.abi.robust_buffer_access = options->robust_buffer_access;
ctx.abi.load_grid_size_from_user_sgpr = args->load_grid_size_from_user_sgpr;
ctx.abi.conformant_trunc_coord = options->conformant_trunc_coord;
bool is_ngg = is_pre_gs_stage(shaders[0]->info.stage) && info->is_ngg;
if (shader_count >= 2 || is_ngg)