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spirv: Implement SPV_EXT_demote_to_helper_invocation 

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Caio Marcelo de Oliveira Filho 2019-06-07 23:08:04 -07:00
parent 5a7c69399d
commit 1a83c9a619
2 changed files with 27 additions and 0 deletions
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1
src/compiler/shader_info.h
View File

@ -35,6 +35,7 @@ extern "C" {
struct spirv_supported_capabilities {
bool address;
bool atomic_storage;
bool demote_to_helper_invocation;
bool derivative_group;
bool descriptor_array_dynamic_indexing;
bool descriptor_array_non_uniform_indexing;

26
src/compiler/spirv/spirv_to_nir.c
View File

@ -3718,6 +3718,10 @@ vtn_handle_preamble_instruction(struct vtn_builder *b, SpvOp opcode,
spv_check_supported(fragment_shader_pixel_interlock, cap);
break;
case SpvCapabilityDemoteToHelperInvocationEXT:
spv_check_supported(demote_to_helper_invocation, cap);
break;
default:
vtn_fail("Unhandled capability: %s (%u)",
spirv_capability_to_string(cap), cap);
@ -4532,6 +4536,28 @@ vtn_handle_body_instruction(struct vtn_builder *b, SpvOp opcode,
vtn_emit_barrier(b, nir_intrinsic_end_invocation_interlock);
break;
case SpvOpDemoteToHelperInvocationEXT: {
nir_intrinsic_instr *intrin =
nir_intrinsic_instr_create(b->shader, nir_intrinsic_demote);
nir_builder_instr_insert(&b->nb, &intrin->instr);
break;
}
case SpvOpIsHelperInvocationEXT: {
nir_intrinsic_instr *intrin =
nir_intrinsic_instr_create(b->shader, nir_intrinsic_is_helper_invocation);
nir_ssa_dest_init(&intrin->instr, &intrin->dest, 1, 1, NULL);
nir_builder_instr_insert(&b->nb, &intrin->instr);
struct vtn_type *res_type =
vtn_value(b, w[1], vtn_value_type_type)->type;
struct vtn_ssa_value *val = vtn_create_ssa_value(b, res_type->type);
val->def = &intrin->dest.ssa;
vtn_push_ssa(b, w[2], res_type, val);
break;
}
default:
vtn_fail_with_opcode("Unhandled opcode", opcode);
}