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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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5
src/compiler/nir/nir_lower_io.c
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@@ -520,7 +520,8 @@ lower_interpolate_at(nir_intrinsic_instr *intrin, struct lower_io_state *state,
nir_intrinsic_set_interp_mode(bary_setup, var->data.interpolation);
if (intrin->intrinsic == nir_intrinsic_interp_deref_at_sample ||
intrin->intrinsic == nir_intrinsic_interp_deref_at_offset)
intrin->intrinsic == nir_intrinsic_interp_deref_at_offset ||
intrin->intrinsic == nir_intrinsic_interp_deref_at_vertex)
nir_src_copy(&bary_setup->src[0], &intrin->src[1], bary_setup);
nir_builder_instr_insert(b, &bary_setup->instr);
@@ -581,6 +582,7 @@ nir_lower_io_block(nir_block *block,
case nir_intrinsic_interp_deref_at_centroid:
case nir_intrinsic_interp_deref_at_sample:
case nir_intrinsic_interp_deref_at_offset:
case nir_intrinsic_interp_deref_at_vertex:
/* We can optionally lower these to load_interpolated_input */
if (options->use_interpolated_input_intrinsics)
break;
@@ -653,6 +655,7 @@ nir_lower_io_block(nir_block *block,
case nir_intrinsic_interp_deref_at_centroid:
case nir_intrinsic_interp_deref_at_sample:
case nir_intrinsic_interp_deref_at_offset:
case nir_intrinsic_interp_deref_at_vertex:
assert(vertex_index == NULL);
replacement = lower_interpolate_at(intrin, state, var, offset,
component_offset, deref->type);