using namespace ir_builder;
+/**
+ * Determine if a thing being dereferenced is row-major
+ *
+ * There is some trickery here.
+ *
+ * If the thing being dereferenced is a member of uniform block \b without an
+ * instance name, then the name of the \c ir_variable is the field name of an
+ * interface type. If this field is row-major, then the thing referenced is
+ * row-major.
+ *
+ * If the thing being dereferenced is a member of uniform block \b with an
+ * instance name, then the last dereference in the tree will be an
+ * \c ir_dereference_record. If that record field is row-major, then the
+ * thing referenced is row-major.
+ */
+static bool
+is_dereferenced_thing_row_major(const ir_dereference *deref)
+{
+ bool matrix = false;
+ const ir_rvalue *ir = deref;
+
+ while (true) {
+ matrix = matrix || ir->type->without_array()->is_matrix();
+
+ switch (ir->ir_type) {
+ case ir_type_dereference_array: {
+ const ir_dereference_array *const array_deref =
+ (const ir_dereference_array *) ir;
+
+ ir = array_deref->array;
+ break;
+ }
+
+ case ir_type_dereference_record: {
+ const ir_dereference_record *const record_deref =
+ (const ir_dereference_record *) ir;
+
+ ir = record_deref->record;
+
+ const int idx = ir->type->field_index(record_deref->field);
+ assert(idx >= 0);
+
+ const enum glsl_matrix_layout matrix_layout =
+ glsl_matrix_layout(ir->type->fields.structure[idx].matrix_layout);
+
+ switch (matrix_layout) {
+ case GLSL_MATRIX_LAYOUT_INHERITED:
+ break;
+ case GLSL_MATRIX_LAYOUT_COLUMN_MAJOR:
+ return false;
+ case GLSL_MATRIX_LAYOUT_ROW_MAJOR:
+ return matrix || deref->type->without_array()->is_record();
+ }
+
+ break;
+ }
+
+ case ir_type_dereference_variable: {
+ const ir_dereference_variable *const var_deref =
+ (const ir_dereference_variable *) ir;
+
+ const enum glsl_matrix_layout matrix_layout =
+ glsl_matrix_layout(var_deref->var->data.matrix_layout);
+
+ switch (matrix_layout) {
+ case GLSL_MATRIX_LAYOUT_INHERITED:
+ assert(!matrix);
+ return false;
+ case GLSL_MATRIX_LAYOUT_COLUMN_MAJOR:
+ return false;
+ case GLSL_MATRIX_LAYOUT_ROW_MAJOR:
+ return matrix || deref->type->without_array()->is_record();
+ }
+
+ unreachable("invalid matrix layout");
+ break;
+ }
+
+ default:
+ return false;
+ }
+ }
+
+ /* The tree must have ended with a dereference that wasn't an
+ * ir_dereference_variable. That is invalid, and it should be impossible.
+ */
+ unreachable("invalid dereference tree");
+ return false;
+}
+
namespace {
class lower_ubo_reference_visitor : public ir_rvalue_enter_visitor {
public:
void handle_rvalue(ir_rvalue **rvalue);
void emit_ubo_loads(ir_dereference *deref, ir_variable *base_offset,
- unsigned int deref_offset);
+ unsigned int deref_offset, bool row_major);
ir_expression *ubo_load(const struct glsl_type *type,
ir_rvalue *offset);
void *mem_ctx;
struct gl_shader *shader;
struct gl_uniform_buffer_variable *ubo_var;
- unsigned uniform_block;
+ ir_rvalue *uniform_block;
bool progress;
};
+/**
+ * Determine the name of the interface block field
+ *
+ * This is the name of the specific member as it would appear in the
+ * \c gl_uniform_buffer_variable::Name field in the shader's
+ * \c UniformBlocks array.
+ */
+static const char *
+interface_field_name(void *mem_ctx, char *base_name, ir_dereference *d,
+ ir_rvalue **nonconst_block_index)
+{
+ ir_rvalue *previous_index = NULL;
+ *nonconst_block_index = NULL;
+
+ while (d != NULL) {
+ switch (d->ir_type) {
+ case ir_type_dereference_variable: {
+ ir_dereference_variable *v = (ir_dereference_variable *) d;
+ if (previous_index
+ && v->var->is_interface_instance()
+ && v->var->type->is_array()) {
+
+ ir_constant *const_index = previous_index->as_constant();
+ if (!const_index) {
+ *nonconst_block_index = previous_index;
+ return ralloc_asprintf(mem_ctx, "%s[0]", base_name);
+ } else {
+ return ralloc_asprintf(mem_ctx,
+ "%s[%d]",
+ base_name,
+ const_index->get_uint_component(0));
+ }
+ } else {
+ return base_name;
+ }
+
+ break;
+ }
+
+ case ir_type_dereference_record: {
+ ir_dereference_record *r = (ir_dereference_record *) d;
+
+ d = r->record->as_dereference();
+ break;
+ }
+
+ case ir_type_dereference_array: {
+ ir_dereference_array *a = (ir_dereference_array *) d;
+
+ d = a->array->as_dereference();
+ previous_index = a->array_index;
+
+ break;
+ }
+
+ default:
+ assert(!"Should not get here.");
+ break;
+ }
+ }
+
+ assert(!"Should not get here.");
+ return NULL;
+}
+
void
lower_ubo_reference_visitor::handle_rvalue(ir_rvalue **rvalue)
{
return;
mem_ctx = ralloc_parent(*rvalue);
- uniform_block = var->uniform_block;
- struct gl_uniform_block *block = &shader->UniformBlocks[uniform_block];
- this->ubo_var = &block->Uniforms[var->location];
+
+ ir_rvalue *nonconst_block_index;
+ const char *const field_name =
+ interface_field_name(mem_ctx, (char *) var->get_interface_type()->name,
+ deref, &nonconst_block_index);
+
+ this->uniform_block = NULL;
+ for (unsigned i = 0; i < shader->NumUniformBlocks; i++) {
+ if (strcmp(field_name, shader->UniformBlocks[i].Name) == 0) {
+
+ ir_constant *index = new(mem_ctx) ir_constant(i);
+
+ if (nonconst_block_index) {
+ if (nonconst_block_index->type != glsl_type::uint_type)
+ nonconst_block_index = i2u(nonconst_block_index);
+ this->uniform_block = add(nonconst_block_index, index);
+ } else {
+ this->uniform_block = index;
+ }
+
+ struct gl_uniform_block *block = &shader->UniformBlocks[i];
+
+ this->ubo_var = var->is_interface_instance()
+ ? &block->Uniforms[0] : &block->Uniforms[var->data.location];
+
+ break;
+ }
+ }
+
+ assert(this->uniform_block);
+
ir_rvalue *offset = new(mem_ctx) ir_constant(0u);
unsigned const_offset = 0;
- bool row_major = ubo_var->RowMajor;
+ bool row_major = is_dereferenced_thing_row_major(deref);
/* Calculate the offset to the start of the region of the UBO
* dereferenced by *rvalue. This may be a variable offset if an
* vector) is handled below in emit_ubo_loads.
*/
array_stride = 4;
+ } else if (deref_array->type->is_interface()) {
+ /* We're processing an array dereference of an interface instance
+ * array. The thing being dereferenced *must* be a variable
+ * dereference because intefaces cannot be embedded an other
+ * types. In terms of calculating the offsets for the lowering
+ * pass, we don't care about the array index. All elements of an
+ * interface instance array will have the same offsets relative to
+ * the base of the block that backs them.
+ */
+ assert(deref_array->array->as_dereference_variable());
+ deref = deref_array->array->as_dereference();
+ break;
} else {
- array_stride = deref_array->type->std140_size(row_major);
+ /* Whether or not the field is row-major (because it might be a
+ * bvec2 or something) does not affect the array itself. We need
+ * to know whether an array element in its entirety is row-major.
+ */
+ const bool array_row_major =
+ is_dereferenced_thing_row_major(deref_array);
+
+ array_stride = deref_array->type->std140_size(array_row_major);
array_stride = glsl_align(array_stride, 16);
}
- ir_constant *const_index = deref_array->array_index->as_constant();
+ ir_rvalue *array_index = deref_array->array_index;
+ if (array_index->type->base_type == GLSL_TYPE_INT)
+ array_index = i2u(array_index);
+
+ ir_constant *const_index =
+ array_index->constant_expression_value(NULL);
if (const_index) {
- const_offset += array_stride * const_index->value.i[0];
+ const_offset += array_stride * const_index->value.u[0];
} else {
offset = add(offset,
- mul(deref_array->array_index,
+ mul(array_index,
new(mem_ctx) ir_constant(array_stride)));
}
deref = deref_array->array->as_dereference();
const glsl_type *struct_type = deref_record->record->type;
unsigned intra_struct_offset = 0;
- unsigned max_field_align = 16;
+ /* glsl_type::std140_base_alignment doesn't grok interfaces. Use
+ * 16-bytes for the alignment because that is the general minimum of
+ * std140.
+ */
+ const unsigned struct_alignment = struct_type->is_interface()
+ ? 16
+ : struct_type->std140_base_alignment(row_major);
+
+
for (unsigned int i = 0; i < struct_type->length; i++) {
const glsl_type *type = struct_type->fields.structure[i].type;
- unsigned field_align = type->std140_base_alignment(row_major);
- max_field_align = MAX2(field_align, max_field_align);
+
+ ir_dereference_record *field_deref =
+ new(mem_ctx) ir_dereference_record(deref_record->record,
+ struct_type->fields.structure[i].name);
+ const bool field_row_major =
+ is_dereferenced_thing_row_major(field_deref);
+
+ ralloc_free(field_deref);
+
+ unsigned field_align = type->std140_base_alignment(field_row_major);
+
intra_struct_offset = glsl_align(intra_struct_offset, field_align);
if (strcmp(struct_type->fields.structure[i].name,
deref_record->field) == 0)
break;
- intra_struct_offset += type->std140_size(row_major);
+ intra_struct_offset += type->std140_size(field_row_major);
+
+ /* If the field just examined was itself a structure, apply rule
+ * #9:
+ *
+ * "The structure may have padding at the end; the base offset
+ * of the member following the sub-structure is rounded up to
+ * the next multiple of the base alignment of the structure."
+ */
+ if (type->without_array()->is_record()) {
+ intra_struct_offset = glsl_align(intra_struct_offset,
+ struct_alignment);
+
+ }
}
- const_offset = glsl_align(const_offset, max_field_align);
const_offset += intra_struct_offset;
deref = deref_record->record->as_dereference();
base_ir->insert_before(assign(load_offset, offset));
deref = new(mem_ctx) ir_dereference_variable(load_var);
- emit_ubo_loads(deref, load_offset, const_offset);
+ emit_ubo_loads(deref, load_offset, const_offset, row_major);
*rvalue = deref;
progress = true;
lower_ubo_reference_visitor::ubo_load(const glsl_type *type,
ir_rvalue *offset)
{
+ ir_rvalue *block_ref = this->uniform_block->clone(mem_ctx, NULL);
return new(mem_ctx)
ir_expression(ir_binop_ubo_load,
- type,
- new(mem_ctx) ir_constant(this->uniform_block),
- offset);
+ type,
+ block_ref,
+ offset);
}
void
lower_ubo_reference_visitor::emit_ubo_loads(ir_dereference *deref,
ir_variable *base_offset,
- unsigned int deref_offset)
+ unsigned int deref_offset,
+ bool row_major)
{
if (deref->type->is_record()) {
unsigned int field_offset = 0;
field_offset =
glsl_align(field_offset,
- field->type->std140_base_alignment(ubo_var->RowMajor));
+ field->type->std140_base_alignment(row_major));
- emit_ubo_loads(field_deref, base_offset, deref_offset + field_offset);
+ emit_ubo_loads(field_deref, base_offset, deref_offset + field_offset,
+ row_major);
- field_offset += field->type->std140_size(ubo_var->RowMajor);
+ field_offset += field->type->std140_size(row_major);
}
return;
}
if (deref->type->is_array()) {
unsigned array_stride =
- glsl_align(deref->type->fields.array->std140_size(ubo_var->RowMajor),
+ glsl_align(deref->type->fields.array->std140_size(row_major),
16);
for (unsigned i = 0; i < deref->type->length; i++) {
new(mem_ctx) ir_dereference_array(deref->clone(mem_ctx, NULL),
element);
emit_ubo_loads(element_deref, base_offset,
- deref_offset + i * array_stride);
+ deref_offset + i * array_stride,
+ row_major);
}
return;
}
new(mem_ctx) ir_dereference_array(deref->clone(mem_ctx, NULL),
col);
- /* std140 always rounds the stride of arrays (and matrices)
- * to a vec4, so matrices are always 16 between columns/rows.
- */
- emit_ubo_loads(col_deref, base_offset, deref_offset + i * 16);
+ if (row_major) {
+ /* For a row-major matrix, the next column starts at the next
+ * element.
+ */
+ emit_ubo_loads(col_deref, base_offset, deref_offset + i * 4,
+ row_major);
+ } else {
+ /* std140 always rounds the stride of arrays (and matrices) to a
+ * vec4, so matrices are always 16 between columns/rows.
+ */
+ emit_ubo_loads(col_deref, base_offset, deref_offset + i * 16,
+ row_major);
+ }
}
return;
}
assert(deref->type->is_scalar() ||
deref->type->is_vector());
- if (!ubo_var->RowMajor) {
+ if (!row_major) {
ir_rvalue *offset = add(base_offset,
new(mem_ctx) ir_constant(deref_offset));
base_ir->insert_before(assign(deref->clone(mem_ctx, NULL),
unsigned matrix_stride = 16;
for (unsigned i = 0; i < deref->type->vector_elements; i++) {
- ir_rvalue *chan = new(mem_ctx) ir_constant((int)i);
- ir_dereference *deref_chan =
- new(mem_ctx) ir_dereference_array(deref->clone(mem_ctx, NULL),
- chan);
-
ir_rvalue *chan_offset =
add(base_offset,
new(mem_ctx) ir_constant(deref_offset + i * matrix_stride));
- base_ir->insert_before(assign(deref_chan,
+ base_ir->insert_before(assign(deref->clone(mem_ctx, NULL),
ubo_load(glsl_type::float_type,
- chan_offset)));
+ chan_offset),
+ (1U << i)));
}
}
}
projects / mesa.git / blobdiff