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nir: add nir_intrinsic_interp_deref_at_vertex

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From the SPV_AMD_shader_explicit_vertex_parameter extension:
   "Returns the value of the input <interpolant> without any
    interpolation, i.e. the raw output value of previous shader
    stage."

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>
This commit is contained in:
Samuel Pitoiset
2020-01-24 16:01:04 +01:00
committed by Marge Bot
parent 687f170311
commit d29f10a7ca
12 changed files with 34 additions and 13 deletions
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8
src/compiler/nir/nir_intrinsics.py
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@@ -170,9 +170,9 @@ intrinsic("copy_deref", src_comp=[-1, -1], indices=[DST_ACCESS, SRC_ACCESS])
# Interpolation of input. The interp_deref_at* intrinsics are similar to the
# load_var intrinsic acting on a shader input except that they interpolate the
# input differently. The at_sample and at_offset intrinsics take an
# additional source that is an integer sample id or a vec2 position offset
# respectively.
# input differently. The at_sample, at_offset and at_vertex intrinsics take an
# additional source that is an integer sample id, a vec2 position offset, or a
# vertex ID respectively.
intrinsic("interp_deref_at_centroid", dest_comp=0, src_comp=[1],
flags=[ CAN_ELIMINATE, CAN_REORDER])
@@ -180,6 +180,8 @@ intrinsic("interp_deref_at_sample", src_comp=[1, 1], dest_comp=0,
flags=[CAN_ELIMINATE, CAN_REORDER])
intrinsic("interp_deref_at_offset", src_comp=[1, 2], dest_comp=0,
flags=[CAN_ELIMINATE, CAN_REORDER])
intrinsic("interp_deref_at_vertex", src_comp=[1, 1], dest_comp=0,
flags=[CAN_ELIMINATE, CAN_REORDER])
# Gets the length of an unsized array at the end of a buffer
intrinsic("deref_buffer_array_length", src_comp=[-1], dest_comp=1,