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nir: add lowering for gl_HelperInvocation

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v2: reword comment about lower_helper_invocations to be more clear
    that it might not work on all hardware
v3: add special variant of load_sample_id which does not imply per-
    sample shading

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark
2018-06-01 14:07:15 -04:00
parent 09f240eb5f
commit 8dfc9e22c1
5 changed files with 36 additions and 0 deletions
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3
src/compiler/nir/nir_intrinsics.py
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@@ -424,6 +424,9 @@ system_value("instance_id", 1)
system_value("base_instance", 1)
system_value("draw_id", 1)
system_value("sample_id", 1)
# sample_id_no_per_sample is like sample_id but does not imply per-
# sample shading. See the lower_helper_invocation option.
system_value("sample_id_no_per_sample", 1)
system_value("sample_pos", 2)
system_value("sample_mask_in", 1)
system_value("primitive_id", 1)