nir_builder builder;
void *mem_ctx;
int (*type_size)(const struct glsl_type *type);
+ nir_variable_mode mode;
};
void
{
unsigned location = 0;
- foreach_list_typed(nir_variable, var, node, var_list) {
+ nir_foreach_variable(var, var_list) {
/*
* UBO's have their own address spaces, so don't count them towards the
* number of global uniforms
*size = location;
}
+/**
+ * Returns true if we're processing a stage whose inputs are arrays indexed
+ * by a vertex number (such as geometry shader inputs).
+ */
static bool
-deref_has_indirect(nir_deref_var *deref)
+is_per_vertex_input(struct lower_io_state *state, nir_variable *var)
{
- for (nir_deref *tail = deref->deref.child; tail; tail = tail->child) {
- if (tail->deref_type == nir_deref_type_array) {
- nir_deref_array *arr = nir_deref_as_array(tail);
- if (arr->deref_array_type == nir_deref_array_type_indirect)
- return true;
- }
- }
+ gl_shader_stage stage = state->builder.shader->stage;
- return false;
+ return var->data.mode == nir_var_shader_in && !var->data.patch &&
+ (stage == MESA_SHADER_TESS_CTRL ||
+ stage == MESA_SHADER_TESS_EVAL ||
+ stage == MESA_SHADER_GEOMETRY);
}
static bool
-mark_indirect_uses_block(nir_block *block, void *void_state)
+is_per_vertex_output(struct lower_io_state *state, nir_variable *var)
{
- struct set *indirect_set = void_state;
-
- nir_foreach_instr(block, instr) {
- if (instr->type != nir_instr_type_intrinsic)
- continue;
-
- nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
-
- for (unsigned i = 0;
- i < nir_intrinsic_infos[intrin->intrinsic].num_variables; i++) {
- if (deref_has_indirect(intrin->variables[i]))
- _mesa_set_add(indirect_set, intrin->variables[i]->var);
- }
- }
-
- return true;
+ gl_shader_stage stage = state->builder.shader->stage;
+ return var->data.mode == nir_var_shader_out && !var->data.patch &&
+ stage == MESA_SHADER_TESS_CTRL;
}
-/* Identical to nir_assign_var_locations_packed except that it assigns
- * locations to the variables that are used 100% directly first and then
- * assigns locations to variables that are used indirectly.
- */
-void
-nir_assign_var_locations_direct_first(nir_shader *shader,
- struct exec_list *var_list,
- unsigned *direct_size,
- unsigned *size,
- int (*type_size)(const struct glsl_type *))
+static nir_ssa_def *
+get_io_offset(nir_builder *b, nir_deref_var *deref,
+ nir_ssa_def **vertex_index,
+ int (*type_size)(const struct glsl_type *))
{
- struct set *indirect_set = _mesa_set_create(NULL, _mesa_hash_pointer,
- _mesa_key_pointer_equal);
-
- nir_foreach_overload(shader, overload) {
- if (overload->impl)
- nir_foreach_block(overload->impl, mark_indirect_uses_block,
- indirect_set);
- }
-
- unsigned location = 0;
-
- foreach_list_typed(nir_variable, var, node, var_list) {
- if ((var->data.mode == nir_var_uniform || var->data.mode == nir_var_shader_storage) &&
- var->interface_type != NULL)
- continue;
-
- if (_mesa_set_search(indirect_set, var))
- continue;
-
- var->data.driver_location = location;
- location += type_size(var->type);
- }
-
- *direct_size = location;
-
- foreach_list_typed(nir_variable, var, node, var_list) {
- if ((var->data.mode == nir_var_uniform || var->data.mode == nir_var_shader_storage) &&
- var->interface_type != NULL)
- continue;
+ nir_deref *tail = &deref->deref;
- if (!_mesa_set_search(indirect_set, var))
- continue;
+ /* For per-vertex input arrays (i.e. geometry shader inputs), keep the
+ * outermost array index separate. Process the rest normally.
+ */
+ if (vertex_index != NULL) {
+ tail = tail->child;
+ assert(tail->deref_type == nir_deref_type_array);
+ nir_deref_array *deref_array = nir_deref_as_array(tail);
- var->data.driver_location = location;
- location += type_size(var->type);
+ nir_ssa_def *vtx = nir_imm_int(b, deref_array->base_offset);
+ if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
+ vtx = nir_iadd(b, vtx, nir_ssa_for_src(b, deref_array->indirect, 1));
+ }
+ *vertex_index = vtx;
}
- *size = location;
-
- _mesa_set_destroy(indirect_set, NULL);
-}
-
-static unsigned
-get_io_offset(nir_deref_var *deref, nir_instr *instr, nir_src *indirect,
- struct lower_io_state *state)
-{
- bool found_indirect = false;
- unsigned base_offset = 0;
+ /* Just emit code and let constant-folding go to town */
+ nir_ssa_def *offset = nir_imm_int(b, 0);
- nir_builder *b = &state->builder;
- nir_builder_insert_before_instr(b, instr);
-
- nir_deref *tail = &deref->deref;
while (tail->child != NULL) {
const struct glsl_type *parent_type = tail->type;
tail = tail->child;
if (tail->deref_type == nir_deref_type_array) {
nir_deref_array *deref_array = nir_deref_as_array(tail);
- unsigned size = state->type_size(tail->type);
+ unsigned size = type_size(tail->type);
- base_offset += size * deref_array->base_offset;
+ offset = nir_iadd(b, offset,
+ nir_imm_int(b, size * deref_array->base_offset));
if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
nir_ssa_def *mul =
nir_imul(b, nir_imm_int(b, size),
nir_ssa_for_src(b, deref_array->indirect, 1));
- if (found_indirect) {
- indirect->ssa =
- nir_iadd(b, nir_ssa_for_src(b, *indirect, 1), mul);
- } else {
- indirect->ssa = mul;
- }
- indirect->is_ssa = true;
- found_indirect = true;
+ offset = nir_iadd(b, offset, mul);
}
} else if (tail->deref_type == nir_deref_type_struct) {
nir_deref_struct *deref_struct = nir_deref_as_struct(tail);
+ unsigned field_offset = 0;
for (unsigned i = 0; i < deref_struct->index; i++) {
- base_offset +=
- state->type_size(glsl_get_struct_field(parent_type, i));
+ field_offset += type_size(glsl_get_struct_field(parent_type, i));
}
+ offset = nir_iadd(b, offset, nir_imm_int(b, field_offset));
}
}
- return base_offset;
+ return offset;
}
static nir_intrinsic_op
-load_op(nir_variable_mode mode, bool has_indirect)
+load_op(struct lower_io_state *state,
+ nir_variable_mode mode, bool per_vertex)
{
nir_intrinsic_op op;
switch (mode) {
case nir_var_shader_in:
- op = has_indirect ? nir_intrinsic_load_input_indirect :
- nir_intrinsic_load_input;
+ op = per_vertex ? nir_intrinsic_load_per_vertex_input :
+ nir_intrinsic_load_input;
+ break;
+ case nir_var_shader_out:
+ op = per_vertex ? nir_intrinsic_load_per_vertex_output :
+ nir_intrinsic_load_output;
break;
case nir_var_uniform:
- op = has_indirect ? nir_intrinsic_load_uniform_indirect :
- nir_intrinsic_load_uniform;
+ op = nir_intrinsic_load_uniform;
break;
default:
unreachable("Unknown variable mode");
{
struct lower_io_state *state = void_state;
+ nir_builder *b = &state->builder;
+
nir_foreach_instr_safe(block, instr) {
if (instr->type != nir_instr_type_intrinsic)
continue;
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
+ if (intrin->intrinsic != nir_intrinsic_load_var &&
+ intrin->intrinsic != nir_intrinsic_store_var)
+ continue;
+
+ nir_variable_mode mode = intrin->variables[0]->var->data.mode;
+
+ if (state->mode != nir_var_all && state->mode != mode)
+ continue;
+
+ if (mode != nir_var_shader_in &&
+ mode != nir_var_shader_out &&
+ mode != nir_var_uniform)
+ continue;
+
+ b->cursor = nir_before_instr(instr);
+
switch (intrin->intrinsic) {
case nir_intrinsic_load_var: {
- nir_variable_mode mode = intrin->variables[0]->var->data.mode;
- if (mode != nir_var_shader_in && mode != nir_var_uniform)
- continue;
+ bool per_vertex =
+ is_per_vertex_input(state, intrin->variables[0]->var) ||
+ is_per_vertex_output(state, intrin->variables[0]->var);
+
+ nir_ssa_def *offset;
+ nir_ssa_def *vertex_index;
- bool has_indirect = deref_has_indirect(intrin->variables[0]);
+ offset = get_io_offset(b, intrin->variables[0],
+ per_vertex ? &vertex_index : NULL,
+ state->type_size);
nir_intrinsic_instr *load =
nir_intrinsic_instr_create(state->mem_ctx,
- load_op(mode, has_indirect));
+ load_op(state, mode, per_vertex));
load->num_components = intrin->num_components;
- nir_src indirect;
- unsigned offset = get_io_offset(intrin->variables[0],
- &intrin->instr, &indirect, state);
+ load->const_index[0] =
+ intrin->variables[0]->var->data.driver_location;
- unsigned location = intrin->variables[0]->var->data.driver_location;
- if (mode == nir_var_uniform) {
- load->const_index[0] = location;
- load->const_index[1] = offset;
- } else {
- load->const_index[0] = location + offset;
- }
+ if (per_vertex)
+ load->src[0] = nir_src_for_ssa(vertex_index);
- if (has_indirect)
- load->src[0] = indirect;
+ load->src[per_vertex ? 1 : 0] = nir_src_for_ssa(offset);
if (intrin->dest.is_ssa) {
nir_ssa_dest_init(&load->instr, &load->dest,
intrin->num_components, NULL);
nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
- nir_src_for_ssa(&load->dest.ssa),
- state->mem_ctx);
+ nir_src_for_ssa(&load->dest.ssa));
} else {
nir_dest_copy(&load->dest, &intrin->dest, state->mem_ctx);
}
}
case nir_intrinsic_store_var: {
- if (intrin->variables[0]->var->data.mode != nir_var_shader_out)
- continue;
+ assert(mode == nir_var_shader_out);
- bool has_indirect = deref_has_indirect(intrin->variables[0]);
+ nir_ssa_def *offset;
+ nir_ssa_def *vertex_index;
- nir_intrinsic_op store_op;
- if (has_indirect) {
- store_op = nir_intrinsic_store_output_indirect;
- } else {
- store_op = nir_intrinsic_store_output;
- }
+ bool per_vertex =
+ is_per_vertex_output(state, intrin->variables[0]->var);
+
+ offset = get_io_offset(b, intrin->variables[0],
+ per_vertex ? &vertex_index : NULL,
+ state->type_size);
+
+ nir_intrinsic_op store_op =
+ per_vertex ? nir_intrinsic_store_per_vertex_output :
+ nir_intrinsic_store_output;
nir_intrinsic_instr *store = nir_intrinsic_instr_create(state->mem_ctx,
store_op);
store->num_components = intrin->num_components;
- nir_src indirect;
- unsigned offset = get_io_offset(intrin->variables[0],
- &intrin->instr, &indirect, state);
- offset += intrin->variables[0]->var->data.driver_location;
+ nir_src_copy(&store->src[0], &intrin->src[0], store);
- store->const_index[0] = offset;
+ store->const_index[0] =
+ intrin->variables[0]->var->data.driver_location;
- nir_src_copy(&store->src[0], &intrin->src[0], state->mem_ctx);
+ if (per_vertex)
+ store->src[1] = nir_src_for_ssa(vertex_index);
- if (has_indirect)
- store->src[1] = indirect;
+ store->src[per_vertex ? 2 : 1] = nir_src_for_ssa(offset);
nir_instr_insert_before(&intrin->instr, &store->instr);
nir_instr_remove(&intrin->instr);
}
static void
-nir_lower_io_impl(nir_function_impl *impl, int(*type_size)(const struct glsl_type *))
+nir_lower_io_impl(nir_function_impl *impl,
+ nir_variable_mode mode,
+ int (*type_size)(const struct glsl_type *))
{
struct lower_io_state state;
nir_builder_init(&state.builder, impl);
state.mem_ctx = ralloc_parent(impl);
+ state.mode = mode;
state.type_size = type_size;
nir_foreach_block(impl, nir_lower_io_block, &state);
}
void
-nir_lower_io(nir_shader *shader, int(*type_size)(const struct glsl_type *))
+nir_lower_io(nir_shader *shader, nir_variable_mode mode,
+ int (*type_size)(const struct glsl_type *))
{
nir_foreach_overload(shader, overload) {
if (overload->impl)
- nir_lower_io_impl(overload->impl, type_size);
+ nir_lower_io_impl(overload->impl, mode, type_size);
+ }
+}
+
+/**
+ * Return the offset soruce for a load/store intrinsic.
+ */
+nir_src *
+nir_get_io_offset_src(nir_intrinsic_instr *instr)
+{
+ switch (instr->intrinsic) {
+ case nir_intrinsic_load_input:
+ case nir_intrinsic_load_output:
+ case nir_intrinsic_load_uniform:
+ return &instr->src[0];
+ case nir_intrinsic_load_ubo:
+ case nir_intrinsic_load_ssbo:
+ case nir_intrinsic_load_per_vertex_input:
+ case nir_intrinsic_load_per_vertex_output:
+ case nir_intrinsic_store_output:
+ return &instr->src[1];
+ case nir_intrinsic_store_ssbo:
+ case nir_intrinsic_store_per_vertex_output:
+ return &instr->src[2];
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * Return the vertex index source for a load/store per_vertex intrinsic.
+ */
+nir_src *
+nir_get_io_vertex_index_src(nir_intrinsic_instr *instr)
+{
+ switch (instr->intrinsic) {
+ case nir_intrinsic_load_per_vertex_input:
+ case nir_intrinsic_load_per_vertex_output:
+ return &instr->src[0];
+ case nir_intrinsic_store_per_vertex_output:
+ return &instr->src[1];
+ default:
+ return NULL;
}
}
projects / mesa.git / blobdiff