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gallium/ttn: add support for system values

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So far just the system values that freedreno supports, so we may add
more later.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Rob Clark
2015-04-10 15:01:16 -04:00
parent 2faa878f13
commit fd65122a90
1 changed files with 34 additions and 0 deletions
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src/gallium/auxiliary/nir/tgsi_to_nir.c
+34
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@@ -153,6 +153,8 @@ ttn_emit_declaration(struct ttn_compile *c)
} else if (file == TGSI_FILE_ADDRESS) {
c->addr_reg = nir_local_reg_create(b->impl);
c->addr_reg->num_components = 4;
} else if (file == TGSI_FILE_SYSTEM_VALUE) {
/* Nothing to record for system values. */
} else if (file == TGSI_FILE_SAMPLER) {
/* Nothing to record for samplers. */
} else {
@@ -324,6 +326,38 @@ ttn_src_for_file_and_index(struct ttn_compile *c, unsigned file, unsigned index,
assert(!indirect);
break;
case TGSI_FILE_SYSTEM_VALUE: {
nir_intrinsic_instr *load;
nir_intrinsic_op op;
unsigned ncomp = 1;
switch (c->scan->system_value_semantic_name[index]) {
case TGSI_SEMANTIC_VERTEXID_NOBASE:
op = nir_intrinsic_load_vertex_id_zero_base;
break;
case TGSI_SEMANTIC_VERTEXID:
op = nir_intrinsic_load_vertex_id;
break;
case TGSI_SEMANTIC_BASEVERTEX:
op = nir_intrinsic_load_base_vertex;
break;
case TGSI_SEMANTIC_INSTANCEID:
op = nir_intrinsic_load_instance_id;
break;
default:
unreachable("bad system value");
}
load = nir_intrinsic_instr_create(b->shader, op);
load->num_components = ncomp;
nir_ssa_dest_init(&load->instr, &load->dest, ncomp, NULL);
nir_instr_insert_after_cf_list(b->cf_node_list, &load->instr);
src = nir_src_for_ssa(&load->dest.ssa);
break;
}
case TGSI_FILE_INPUT:
case TGSI_FILE_CONSTANT: {
nir_intrinsic_instr *load;