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i965/nir/vec4: Implement intrinsics that load system values

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These include:

nir_intrinsic_load_vertex_id_zero_base
nir_intrinsic_load_base_vertex
nir_intrinsic_load_instance_id

The source register is fetched from the nir_system_values map initialized
during nir_setup_system_values stage.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Alejandro Piñeiro 2015-06-16 21:36:49 +02:00 • committed by Jason Ekstrand
parent 662c4c9906
commit e76e8caecd
1 changed files with 21 additions and 6 deletions
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27
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -494,17 +494,32 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
case nir_intrinsic_load_vertex_id:
unreachable("should be lowered by lower_vertex_id()");
case nir_intrinsic_load_vertex_id_zero_base:
/* @TODO: Not yet implemented */
case nir_intrinsic_load_vertex_id_zero_base: {
src_reg vertex_id =
src_reg(nir_system_values[SYSTEM_VALUE_VERTEX_ID_ZERO_BASE]);
assert(vertex_id.file != BAD_FILE);
dest = get_nir_dest(instr->dest, vertex_id.type);
emit(MOV(dest, vertex_id));
break;
}
case nir_intrinsic_load_base_vertex:
/* @TODO: Not yet implemented */
case nir_intrinsic_load_base_vertex: {
src_reg base_vertex =
src_reg(nir_system_values[SYSTEM_VALUE_BASE_VERTEX]);
assert(base_vertex.file != BAD_FILE);
dest = get_nir_dest(instr->dest, base_vertex.type);
emit(MOV(dest, base_vertex));
break;
}
case nir_intrinsic_load_instance_id:
/* @TODO: Not yet implemented */
case nir_intrinsic_load_instance_id: {
src_reg instance_id =
src_reg(nir_system_values[SYSTEM_VALUE_INSTANCE_ID]);
assert(instance_id.file != BAD_FILE);
dest = get_nir_dest(instr->dest, instance_id.type);
emit(MOV(dest, instance_id));
break;
}
case nir_intrinsic_load_uniform_indirect:
/* fallthrough */