/*
* This lowering pass converts references to input/output variables with
* loads/stores to actual input/output intrinsics.
- *
- * NOTE: This pass really only works for scalar backends at the moment due
- * to the way it packes the input/output data.
*/
#include "nir.h"
+#include "nir_builder.h"
struct lower_io_state {
+ nir_builder builder;
void *mem_ctx;
+ int (*type_size)(const struct glsl_type *type);
};
-static unsigned
-type_size(const struct glsl_type *type)
-{
- unsigned int size, i;
-
- switch (glsl_get_base_type(type)) {
- case GLSL_TYPE_UINT:
- case GLSL_TYPE_INT:
- case GLSL_TYPE_FLOAT:
- case GLSL_TYPE_BOOL:
- return glsl_get_components(type);
- case GLSL_TYPE_ARRAY:
- return type_size(glsl_get_array_element(type)) * glsl_get_length(type);
- case GLSL_TYPE_STRUCT:
- size = 0;
- for (i = 0; i < glsl_get_length(type); i++) {
- size += type_size(glsl_get_struct_field(type, i));
- }
- return size;
- case GLSL_TYPE_SAMPLER:
- return 0;
- case GLSL_TYPE_ATOMIC_UINT:
- return 0;
- case GLSL_TYPE_INTERFACE:
- return 0;
- case GLSL_TYPE_IMAGE:
- return 0;
- case GLSL_TYPE_FUNCTION:
- case GLSL_TYPE_VOID:
- case GLSL_TYPE_ERROR:
- case GLSL_TYPE_DOUBLE:
- unreachable("not reached");
- }
-
- return 0;
-}
-
void
-nir_assign_var_locations_scalar(struct exec_list *var_list, unsigned *size)
+nir_assign_var_locations(struct exec_list *var_list, unsigned *size,
+ int (*type_size)(const struct glsl_type *))
{
unsigned location = 0;
* UBO's have their own address spaces, so don't count them towards the
* number of global uniforms
*/
- if (var->data.mode == nir_var_uniform && var->interface_type != NULL)
+ if ((var->data.mode == nir_var_uniform || var->data.mode == nir_var_shader_storage) &&
+ var->interface_type != NULL)
continue;
var->data.driver_location = location;
return false;
}
-static bool
-mark_indirect_uses_block(nir_block *block, void *void_state)
-{
- 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;
-}
-
-/* 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_scalar_direct_first(nir_shader *shader,
- struct exec_list *var_list,
- unsigned *direct_size,
- unsigned *size)
-{
- 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->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->interface_type != NULL)
- continue;
-
- if (!_mesa_set_search(indirect_set, var))
- continue;
-
- var->data.driver_location = location;
- location += type_size(var->type);
- }
-
- *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;
+ nir_builder *b = &state->builder;
+ b->cursor = nir_before_instr(instr);
+
nir_deref *tail = &deref->deref;
while (tail->child != NULL) {
const struct glsl_type *parent_type = tail->type;
if (tail->deref_type == nir_deref_type_array) {
nir_deref_array *deref_array = nir_deref_as_array(tail);
- unsigned size = type_size(tail->type);
+ unsigned size = state->type_size(tail->type);
base_offset += size * deref_array->base_offset;
if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
- nir_load_const_instr *load_const =
- nir_load_const_instr_create(state->mem_ctx, 1);
- load_const->value.u[0] = size;
- nir_instr_insert_before(instr, &load_const->instr);
-
- nir_alu_instr *mul = nir_alu_instr_create(state->mem_ctx,
- nir_op_imul);
- mul->src[0].src.is_ssa = true;
- mul->src[0].src.ssa = &load_const->def;
- nir_src_copy(&mul->src[1].src, &deref_array->indirect,
- state->mem_ctx);
- mul->dest.write_mask = 1;
- nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, NULL);
- nir_instr_insert_before(instr, &mul->instr);
+ nir_ssa_def *mul =
+ nir_imul(b, nir_imm_int(b, size),
+ nir_ssa_for_src(b, deref_array->indirect, 1));
if (found_indirect) {
- nir_alu_instr *add = nir_alu_instr_create(state->mem_ctx,
- nir_op_iadd);
- add->src[0].src = *indirect;
- add->src[1].src.is_ssa = true;
- add->src[1].src.ssa = &mul->dest.dest.ssa;
- add->dest.write_mask = 1;
- nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, NULL);
- nir_instr_insert_before(instr, &add->instr);
-
- indirect->is_ssa = true;
- indirect->ssa = &add->dest.dest.ssa;
+ indirect->ssa =
+ nir_iadd(b, nir_ssa_for_src(b, *indirect, 1), mul);
} else {
- indirect->is_ssa = true;
- indirect->ssa = &mul->dest.dest.ssa;
- found_indirect = true;
+ indirect->ssa = mul;
}
+ indirect->is_ssa = true;
+ found_indirect = true;
}
} else if (tail->deref_type == nir_deref_type_struct) {
nir_deref_struct *deref_struct = nir_deref_as_struct(tail);
- for (unsigned i = 0; i < deref_struct->index; i++)
- base_offset += type_size(glsl_get_struct_field(parent_type, i));
+ for (unsigned i = 0; i < deref_struct->index; i++) {
+ base_offset +=
+ state->type_size(glsl_get_struct_field(parent_type, i));
+ }
}
}
return base_offset;
}
+static nir_intrinsic_op
+load_op(nir_variable_mode mode, bool has_indirect)
+{
+ nir_intrinsic_op op;
+ switch (mode) {
+ case nir_var_shader_in:
+ op = has_indirect ? nir_intrinsic_load_input_indirect :
+ nir_intrinsic_load_input;
+ break;
+ case nir_var_uniform:
+ op = has_indirect ? nir_intrinsic_load_uniform_indirect :
+ nir_intrinsic_load_uniform;
+ break;
+ default:
+ unreachable("Unknown variable mode");
+ }
+ return op;
+}
+
static bool
nir_lower_io_block(nir_block *block, void *void_state)
{
bool has_indirect = deref_has_indirect(intrin->variables[0]);
- /* Figure out the opcode */
- nir_intrinsic_op load_op;
- switch (mode) {
- case nir_var_shader_in:
- load_op = has_indirect ? nir_intrinsic_load_input_indirect :
- nir_intrinsic_load_input;
- break;
- case nir_var_uniform:
- load_op = has_indirect ? nir_intrinsic_load_uniform_indirect :
- nir_intrinsic_load_uniform;
- break;
- default:
- unreachable("Unknown variable mode");
- }
-
- nir_intrinsic_instr *load = nir_intrinsic_instr_create(state->mem_ctx,
- load_op);
+ nir_intrinsic_instr *load =
+ nir_intrinsic_instr_create(state->mem_ctx,
+ load_op(mode, has_indirect));
load->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;
- load->const_index[0] = offset;
- load->const_index[1] = 1;
+ 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 (has_indirect)
load->src[0] = indirect;
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);
}
offset += intrin->variables[0]->var->data.driver_location;
store->const_index[0] = offset;
- store->const_index[1] = 1;
- nir_src_copy(&store->src[0], &intrin->src[0], state->mem_ctx);
+ nir_src_copy(&store->src[0], &intrin->src[0], store);
if (has_indirect)
store->src[1] = indirect;
}
static void
-nir_lower_io_impl(nir_function_impl *impl)
+nir_lower_io_impl(nir_function_impl *impl, 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.type_size = type_size;
nir_foreach_block(impl, nir_lower_io_block, &state);
}
void
-nir_lower_io(nir_shader *shader)
+nir_lower_io(nir_shader *shader, int(*type_size)(const struct glsl_type *))
{
nir_foreach_overload(shader, overload) {
if (overload->impl)
- nir_lower_io_impl(overload->impl);
+ nir_lower_io_impl(overload->impl, type_size);
}
}
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