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nir: Add intrinsics from ARB_shader_group_vote

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These are intrinsics rather than opcodes, because they operate across
channels.

Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner
2017-06-20 22:37:43 -07:00
parent 0e6ad379dd
commit ba2fbbf1c0
2 changed files with 27 additions and 0 deletions
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22
src/compiler/glsl/glsl_to_nir.cpp
View File

@@ -799,6 +799,15 @@ nir_visitor::visit(ir_call *ir)
case ir_intrinsic_shared_atomic_comp_swap:
op = nir_intrinsic_shared_atomic_comp_swap;
break;
case ir_intrinsic_vote_any:
op = nir_intrinsic_vote_any;
break;
case ir_intrinsic_vote_all:
op = nir_intrinsic_vote_all;
break;
case ir_intrinsic_vote_eq:
op = nir_intrinsic_vote_eq;
break;
default:
unreachable("not reached");
}
@@ -1135,6 +1144,19 @@ nir_visitor::visit(ir_call *ir)
nir_builder_instr_insert(&b, &instr->instr);
break;
}
case nir_intrinsic_vote_any:
case nir_intrinsic_vote_all:
case nir_intrinsic_vote_eq: {
nir_ssa_dest_init(&instr->instr, &instr->dest, 1, 32, NULL);
instr->variables[0] = evaluate_deref(&instr->instr, ir->return_deref);
ir_rvalue *value = (ir_rvalue *) ir->actual_parameters.get_head();
instr->src[0] = nir_src_for_ssa(evaluate_rvalue(value));
nir_builder_instr_insert(&b, &instr->instr);
break;
}
default:
unreachable("not reached");
}

5
src/compiler/nir/nir_intrinsics.h
View File

@@ -107,6 +107,11 @@ BARRIER(memory_barrier_shared)
/** A conditional discard, with a single boolean source. */
INTRINSIC(discard_if, 1, ARR(1), false, 0, 0, 0, xx, xx, xx, 0)
/** ARB_shader_group_vote intrinsics */
INTRINSIC(vote_any, 1, ARR(1), true, 1, 1, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(vote_all, 1, ARR(1), true, 1, 1, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(vote_eq, 1, ARR(1), true, 1, 1, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
/**
* Basic Geometry Shader intrinsics.
*