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nir: add load_point_coord_maybe_flipped intrinsics for point smoothing 

gl_PointCoord can be flipped upside down via a state.
To avoid this adding new load_point_coord_maybe_flipped intrinsics.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15117>
This commit is contained in:
Arvind Yadav 2022-02-25 12:44:36 +05:30 committed by Marek Olšák
parent 25204d89a6
commit cad4908fa0
1 changed files with 7 additions and 0 deletions
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7
src/compiler/nir/nir_intrinsics.py
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@ -1520,3 +1520,10 @@ system_value("leaf_procedural_intel", 1, bit_sizes=[1])
# 3: Intersection
system_value("btd_shader_type_intel", 1)
system_value("ray_query_global_intel", 1, bit_sizes=[64])
# In order to deal with flipped render targets, gl_PointCoord may be flipped
# in the shader requiring a shader key or extra instructions or it may be
# flipped in hardware based on a state bit. This version of gl_PointCoord
# is defined to be whatever thing the hardware can easily give you, so long as
# it's in normalized coordinates in the range [0, 1] across the point.
intrinsic("load_point_coord_maybe_flipped", dest_comp=2, bit_sizes=[32])