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nir: Make ballot intrinsics variable-size

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This way they can return either a uvec4 or a uint64_t.  At the moment,
this is a no-op since we still always return a uint64_t.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Jason Ekstrand
2017-08-22 19:58:59 -07:00
parent ad127afcfd
commit 3ee91ee6ac
3 changed files with 8 additions and 6 deletions
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1
src/compiler/glsl/glsl_to_nir.cpp
View File

@@ -1165,6 +1165,7 @@ nir_visitor::visit(ir_call *ir)
case nir_intrinsic_ballot: {
nir_ssa_dest_init(&instr->instr, &instr->dest,
ir->return_deref->type->vector_elements, 64, NULL);
instr->num_components = ir->return_deref->type->vector_elements;
ir_rvalue *value = (ir_rvalue *) ir->actual_parameters.get_head();
instr->src[0] = nir_src_for_ssa(evaluate_rvalue(value));

12
src/compiler/nir/nir_intrinsics.h
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@@ -102,7 +102,7 @@ INTRINSIC(shader_clock, 0, ARR(0), true, 2, 0, 0, xx, xx, xx, NIR_INTRINSIC_CAN_
*
* GLSL functions from ARB_shader_ballot.
*/
INTRINSIC(ballot, 1, ARR(1), true, 1, 0, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(ballot, 1, ARR(1), true, 0, 0, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(read_invocation, 2, ARR(0, 1), true, 0, 0, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(read_first_invocation, 1, ARR(0), true, 0, 0, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE)
@@ -350,11 +350,11 @@ SYSTEM_VALUE(layer_id, 1, 0, xx, xx, xx)
SYSTEM_VALUE(view_index, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_size, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_invocation, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_eq_mask, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_ge_mask, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_gt_mask, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_le_mask, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_lt_mask, 1, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_eq_mask, 0, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_ge_mask, 0, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_gt_mask, 0, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_le_mask, 0, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_lt_mask, 0, 0, xx, xx, xx)
SYSTEM_VALUE(subgroup_id, 1, 0, xx, xx, xx)
/* Blend constant color values. Float values are clamped. */

1
src/compiler/nir/nir_lower_system_values.c
View File

@@ -126,6 +126,7 @@ convert_block(nir_block *block, nir_builder *b)
nir_intrinsic_from_system_value(var->data.location);
nir_intrinsic_instr *load = nir_intrinsic_instr_create(b->shader, op);
nir_ssa_dest_init(&load->instr, &load->dest, 1, 64, NULL);
load->num_components = 1;
nir_builder_instr_insert(b, &load->instr);
sysval = &load->dest.ssa;
break;