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nir/spirv/glsl450: Add support for the InterpolateAt opcodes

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Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jason Ekstrand
2016-09-13 21:10:13 -07:00
parent a529644889
commit d2f42a945e
1 changed files with 53 additions and 1 deletions
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54
src/compiler/spirv/vtn_glsl450.c
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@@ -634,6 +634,57 @@ handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
}
}
static void
handle_glsl450_interpolation(struct vtn_builder *b, enum GLSLstd450 opcode,
const uint32_t *w, unsigned count)
{
const struct glsl_type *dest_type =
vtn_value(b, w[1], vtn_value_type_type)->type->type;
struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_ssa);
val->ssa = vtn_create_ssa_value(b, dest_type);
nir_intrinsic_op op;
switch (opcode) {
case GLSLstd450InterpolateAtCentroid:
op = nir_intrinsic_interp_var_at_centroid;
break;
case GLSLstd450InterpolateAtSample:
op = nir_intrinsic_interp_var_at_sample;
break;
case GLSLstd450InterpolateAtOffset:
op = nir_intrinsic_interp_var_at_offset;
break;
default:
unreachable("Invalid opcode");
}
nir_intrinsic_instr *intrin = nir_intrinsic_instr_create(b->nb.shader, op);
nir_deref_var *deref = vtn_nir_deref(b, w[5]);
intrin->variables[0] =
nir_deref_as_var(nir_copy_deref(intrin, &deref->deref));
switch (opcode) {
case GLSLstd450InterpolateAtCentroid:
break;
case GLSLstd450InterpolateAtSample:
case GLSLstd450InterpolateAtOffset:
intrin->src[0] = nir_src_for_ssa(vtn_ssa_value(b, w[6])->def);
break;
default:
unreachable("Invalid opcode");
}
intrin->num_components = glsl_get_vector_elements(dest_type);
nir_ssa_dest_init(&intrin->instr, &intrin->dest,
glsl_get_vector_elements(dest_type),
glsl_get_bit_size(dest_type), NULL);
val->ssa->def = &intrin->dest.ssa;
nir_builder_instr_insert(&b->nb, &intrin->instr);
}
bool
vtn_handle_glsl450_instruction(struct vtn_builder *b, uint32_t ext_opcode,
const uint32_t *w, unsigned count)
@@ -656,7 +707,8 @@ vtn_handle_glsl450_instruction(struct vtn_builder *b, uint32_t ext_opcode,
case GLSLstd450InterpolateAtCentroid:
case GLSLstd450InterpolateAtSample:
case GLSLstd450InterpolateAtOffset:
unreachable("Unhandled opcode");
handle_glsl450_interpolation(b, ext_opcode, w, count);
break;
default:
handle_glsl450_alu(b, (enum GLSLstd450)ext_opcode, w, count);