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24 #include "main/core.h" /* for MAX2 */
26 #include "ir_visitor.h"
27 #include "glsl_types.h"
29 ir_rvalue::ir_rvalue()
31 this->type = glsl_type::error_type;
34 bool ir_rvalue::is_zero() const
39 bool ir_rvalue::is_one() const
44 bool ir_rvalue::is_negative_one() const
50 * Modify the swizzle make to move one component to another
52 * \param m IR swizzle to be modified
53 * \param from Component in the RHS that is to be swizzled
54 * \param to Desired swizzle location of \c from
57 update_rhs_swizzle(ir_swizzle_mask &m, unsigned from, unsigned to)
60 case 0: m.x = from; break;
61 case 1: m.y = from; break;
62 case 2: m.z = from; break;
63 case 3: m.w = from; break;
64 default: assert(!"Should not get here.");
67 m.num_components = MAX2(m.num_components, (to + 1));
71 ir_assignment::set_lhs(ir_rvalue *lhs)
74 bool swizzled = false;
77 ir_swizzle *swiz = lhs->as_swizzle();
82 unsigned write_mask = 0;
83 ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
85 for (unsigned i = 0; i < swiz->mask.num_components; i++) {
89 case 0: c = swiz->mask.x; break;
90 case 1: c = swiz->mask.y; break;
91 case 2: c = swiz->mask.z; break;
92 case 3: c = swiz->mask.w; break;
93 default: assert(!"Should not get here.");
96 write_mask |= (((this->write_mask >> i) & 1) << c);
97 update_rhs_swizzle(rhs_swiz, i, c);
100 this->write_mask = write_mask;
103 this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
108 /* Now, RHS channels line up with the LHS writemask. Collapse it
109 * to just the channels that will be written.
111 ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
113 for (int i = 0; i < 4; i++) {
114 if (write_mask & (1 << i))
115 update_rhs_swizzle(rhs_swiz, i, rhs_chan++);
117 this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
120 assert((lhs == NULL) || lhs->as_dereference());
122 this->lhs = (ir_dereference *) lhs;
126 ir_assignment::whole_variable_written()
128 ir_variable *v = this->lhs->whole_variable_referenced();
133 if (v->type->is_scalar())
136 if (v->type->is_vector()) {
137 const unsigned mask = (1U << v->type->vector_elements) - 1;
139 if (mask != this->write_mask)
143 /* Either all the vector components are assigned or the variable is some
144 * composite type (and the whole thing is assigned.
149 ir_assignment::ir_assignment(ir_dereference *lhs, ir_rvalue *rhs,
150 ir_rvalue *condition, unsigned write_mask)
152 this->ir_type = ir_type_assignment;
153 this->condition = condition;
156 this->write_mask = write_mask;
158 if (lhs->type->is_scalar() || lhs->type->is_vector()) {
159 int lhs_components = 0;
160 for (int i = 0; i < 4; i++) {
161 if (write_mask & (1 << i))
165 assert(lhs_components == this->rhs->type->vector_elements);
169 ir_assignment::ir_assignment(ir_rvalue *lhs, ir_rvalue *rhs,
170 ir_rvalue *condition)
172 this->ir_type = ir_type_assignment;
173 this->condition = condition;
176 /* If the RHS is a vector type, assume that all components of the vector
177 * type are being written to the LHS. The write mask comes from the RHS
178 * because we can have a case where the LHS is a vec4 and the RHS is a
179 * vec3. In that case, the assignment is:
181 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
183 if (rhs->type->is_vector())
184 this->write_mask = (1U << rhs->type->vector_elements) - 1;
185 else if (rhs->type->is_scalar())
186 this->write_mask = 1;
188 this->write_mask = 0;
194 ir_expression::ir_expression(int op, const struct glsl_type *type,
197 assert(get_num_operands(ir_expression_operation(op)) == 1);
198 this->ir_type = ir_type_expression;
200 this->operation = ir_expression_operation(op);
201 this->operands[0] = op0;
202 this->operands[1] = NULL;
203 this->operands[2] = NULL;
204 this->operands[3] = NULL;
207 ir_expression::ir_expression(int op, const struct glsl_type *type,
208 ir_rvalue *op0, ir_rvalue *op1)
210 assert(((op1 == NULL) && (get_num_operands(ir_expression_operation(op)) == 1))
211 || (get_num_operands(ir_expression_operation(op)) == 2));
212 this->ir_type = ir_type_expression;
214 this->operation = ir_expression_operation(op);
215 this->operands[0] = op0;
216 this->operands[1] = op1;
217 this->operands[2] = NULL;
218 this->operands[3] = NULL;
221 ir_expression::ir_expression(int op, const struct glsl_type *type,
222 ir_rvalue *op0, ir_rvalue *op1,
223 ir_rvalue *op2, ir_rvalue *op3)
225 this->ir_type = ir_type_expression;
227 this->operation = ir_expression_operation(op);
228 this->operands[0] = op0;
229 this->operands[1] = op1;
230 this->operands[2] = op2;
231 this->operands[3] = op3;
234 ir_expression::ir_expression(int op, ir_rvalue *op0)
236 this->ir_type = ir_type_expression;
238 this->operation = ir_expression_operation(op);
239 this->operands[0] = op0;
240 this->operands[1] = NULL;
241 this->operands[2] = NULL;
242 this->operands[3] = NULL;
244 assert(op <= ir_last_unop);
246 switch (this->operation) {
247 case ir_unop_bit_not:
248 case ir_unop_logic_not:
263 case ir_unop_round_even:
266 case ir_unop_sin_reduced:
267 case ir_unop_cos_reduced:
270 this->type = op0->type;
275 this->type = glsl_type::get_instance(GLSL_TYPE_INT,
276 op0->type->vector_elements, 1);
282 this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
283 op0->type->vector_elements, 1);
288 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
289 op0->type->vector_elements, 1);
293 this->type = glsl_type::float_type;
297 this->type = glsl_type::bool_type;
301 assert(!"not reached: missing automatic type setup for ir_expression");
302 this->type = op0->type;
307 ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
309 this->ir_type = ir_type_expression;
311 this->operation = ir_expression_operation(op);
312 this->operands[0] = op0;
313 this->operands[1] = op1;
314 this->operands[2] = NULL;
315 this->operands[3] = NULL;
317 assert(op > ir_last_unop);
319 switch (this->operation) {
320 case ir_binop_all_equal:
321 case ir_binop_any_nequal:
322 this->type = glsl_type::bool_type;
333 if (op0->type->is_scalar()) {
334 this->type = op1->type;
335 } else if (op1->type->is_scalar()) {
336 this->type = op0->type;
338 /* FINISHME: matrix types */
339 assert(!op0->type->is_matrix() && !op1->type->is_matrix());
340 assert(op0->type == op1->type);
341 this->type = op0->type;
345 case ir_binop_logic_and:
346 case ir_binop_logic_xor:
347 case ir_binop_logic_or:
348 case ir_binop_bit_and:
349 case ir_binop_bit_xor:
350 case ir_binop_bit_or:
351 if (op0->type->is_scalar()) {
352 this->type = op1->type;
353 } else if (op1->type->is_scalar()) {
354 this->type = op0->type;
359 case ir_binop_nequal:
360 case ir_binop_lequal:
361 case ir_binop_gequal:
363 case ir_binop_greater:
364 assert(op0->type == op1->type);
365 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
366 op0->type->vector_elements, 1);
370 this->type = glsl_type::float_type;
373 case ir_binop_lshift:
374 case ir_binop_rshift:
375 this->type = op0->type;
379 assert(!"not reached: missing automatic type setup for ir_expression");
380 this->type = glsl_type::float_type;
385 ir_expression::get_num_operands(ir_expression_operation op)
387 assert(op <= ir_last_opcode);
389 if (op <= ir_last_unop)
392 if (op <= ir_last_binop)
395 if (op == ir_quadop_vector)
402 static const char *const operator_strs[] = {
463 const char *ir_expression::operator_string(ir_expression_operation op)
465 assert((unsigned int) op < Elements(operator_strs));
466 assert(Elements(operator_strs) == (ir_quadop_vector + 1));
467 return operator_strs[op];
470 const char *ir_expression::operator_string()
472 return operator_string(this->operation);
475 ir_expression_operation
476 ir_expression::get_operator(const char *str)
478 const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
479 for (int op = 0; op < operator_count; op++) {
480 if (strcmp(str, operator_strs[op]) == 0)
481 return (ir_expression_operation) op;
483 return (ir_expression_operation) -1;
486 ir_constant::ir_constant()
488 this->ir_type = ir_type_constant;
491 ir_constant::ir_constant(const struct glsl_type *type,
492 const ir_constant_data *data)
494 assert((type->base_type >= GLSL_TYPE_UINT)
495 && (type->base_type <= GLSL_TYPE_BOOL));
497 this->ir_type = ir_type_constant;
499 memcpy(& this->value, data, sizeof(this->value));
502 ir_constant::ir_constant(float f)
504 this->ir_type = ir_type_constant;
505 this->type = glsl_type::float_type;
506 this->value.f[0] = f;
507 for (int i = 1; i < 16; i++) {
508 this->value.f[i] = 0;
512 ir_constant::ir_constant(unsigned int u)
514 this->ir_type = ir_type_constant;
515 this->type = glsl_type::uint_type;
516 this->value.u[0] = u;
517 for (int i = 1; i < 16; i++) {
518 this->value.u[i] = 0;
522 ir_constant::ir_constant(int i)
524 this->ir_type = ir_type_constant;
525 this->type = glsl_type::int_type;
526 this->value.i[0] = i;
527 for (int i = 1; i < 16; i++) {
528 this->value.i[i] = 0;
532 ir_constant::ir_constant(bool b)
534 this->ir_type = ir_type_constant;
535 this->type = glsl_type::bool_type;
536 this->value.b[0] = b;
537 for (int i = 1; i < 16; i++) {
538 this->value.b[i] = false;
542 ir_constant::ir_constant(const ir_constant *c, unsigned i)
544 this->ir_type = ir_type_constant;
545 this->type = c->type->get_base_type();
547 switch (this->type->base_type) {
548 case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
549 case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
550 case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
551 case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
552 default: assert(!"Should not get here."); break;
556 ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
558 this->ir_type = ir_type_constant;
561 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
562 || type->is_record() || type->is_array());
564 if (type->is_array()) {
565 this->array_elements = talloc_array(this, ir_constant *, type->length);
567 foreach_list(node, value_list) {
568 ir_constant *value = (ir_constant *) node;
569 assert(value->as_constant() != NULL);
571 this->array_elements[i++] = value;
576 /* If the constant is a record, the types of each of the entries in
577 * value_list must be a 1-for-1 match with the structure components. Each
578 * entry must also be a constant. Just move the nodes from the value_list
579 * to the list in the ir_constant.
581 /* FINISHME: Should there be some type checking and / or assertions here? */
582 /* FINISHME: Should the new constant take ownership of the nodes from
583 * FINISHME: value_list, or should it make copies?
585 if (type->is_record()) {
586 value_list->move_nodes_to(& this->components);
590 for (unsigned i = 0; i < 16; i++) {
591 this->value.u[i] = 0;
594 ir_constant *value = (ir_constant *) (value_list->head);
596 /* Constructors with exactly one scalar argument are special for vectors
597 * and matrices. For vectors, the scalar value is replicated to fill all
598 * the components. For matrices, the scalar fills the components of the
599 * diagonal while the rest is filled with 0.
601 if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
602 if (type->is_matrix()) {
603 /* Matrix - fill diagonal (rest is already set to 0) */
604 assert(type->base_type == GLSL_TYPE_FLOAT);
605 for (unsigned i = 0; i < type->matrix_columns; i++)
606 this->value.f[i * type->vector_elements + i] = value->value.f[0];
608 /* Vector or scalar - fill all components */
609 switch (type->base_type) {
612 for (unsigned i = 0; i < type->components(); i++)
613 this->value.u[i] = value->value.u[0];
615 case GLSL_TYPE_FLOAT:
616 for (unsigned i = 0; i < type->components(); i++)
617 this->value.f[i] = value->value.f[0];
620 for (unsigned i = 0; i < type->components(); i++)
621 this->value.b[i] = value->value.b[0];
624 assert(!"Should not get here.");
631 if (type->is_matrix() && value->type->is_matrix()) {
632 assert(value->next->is_tail_sentinel());
634 /* From section 5.4.2 of the GLSL 1.20 spec:
635 * "If a matrix is constructed from a matrix, then each component
636 * (column i, row j) in the result that has a corresponding component
637 * (column i, row j) in the argument will be initialized from there."
639 unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
640 unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
641 for (unsigned i = 0; i < cols; i++) {
642 for (unsigned j = 0; j < rows; j++) {
643 const unsigned src = i * value->type->vector_elements + j;
644 const unsigned dst = i * type->vector_elements + j;
645 this->value.f[dst] = value->value.f[src];
649 /* "All other components will be initialized to the identity matrix." */
650 for (unsigned i = cols; i < type->matrix_columns; i++)
651 this->value.f[i * type->vector_elements + i] = 1.0;
656 /* Use each component from each entry in the value_list to initialize one
657 * component of the constant being constructed.
659 for (unsigned i = 0; i < type->components(); /* empty */) {
660 assert(value->as_constant() != NULL);
661 assert(!value->is_tail_sentinel());
663 for (unsigned j = 0; j < value->type->components(); j++) {
664 switch (type->base_type) {
666 this->value.u[i] = value->get_uint_component(j);
669 this->value.i[i] = value->get_int_component(j);
671 case GLSL_TYPE_FLOAT:
672 this->value.f[i] = value->get_float_component(j);
675 this->value.b[i] = value->get_bool_component(j);
678 /* FINISHME: What to do? Exceptions are not the answer.
684 if (i >= type->components())
688 value = (ir_constant *) value->next;
693 ir_constant::zero(void *mem_ctx, const glsl_type *type)
695 assert(type->is_numeric() || type->is_boolean());
697 ir_constant *c = new(mem_ctx) ir_constant;
699 memset(&c->value, 0, sizeof(c->value));
705 ir_constant::get_bool_component(unsigned i) const
707 switch (this->type->base_type) {
708 case GLSL_TYPE_UINT: return this->value.u[i] != 0;
709 case GLSL_TYPE_INT: return this->value.i[i] != 0;
710 case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
711 case GLSL_TYPE_BOOL: return this->value.b[i];
712 default: assert(!"Should not get here."); break;
715 /* Must return something to make the compiler happy. This is clearly an
722 ir_constant::get_float_component(unsigned i) const
724 switch (this->type->base_type) {
725 case GLSL_TYPE_UINT: return (float) this->value.u[i];
726 case GLSL_TYPE_INT: return (float) this->value.i[i];
727 case GLSL_TYPE_FLOAT: return this->value.f[i];
728 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
729 default: assert(!"Should not get here."); break;
732 /* Must return something to make the compiler happy. This is clearly an
739 ir_constant::get_int_component(unsigned i) const
741 switch (this->type->base_type) {
742 case GLSL_TYPE_UINT: return this->value.u[i];
743 case GLSL_TYPE_INT: return this->value.i[i];
744 case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
745 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
746 default: assert(!"Should not get here."); break;
749 /* Must return something to make the compiler happy. This is clearly an
756 ir_constant::get_uint_component(unsigned i) const
758 switch (this->type->base_type) {
759 case GLSL_TYPE_UINT: return this->value.u[i];
760 case GLSL_TYPE_INT: return this->value.i[i];
761 case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
762 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
763 default: assert(!"Should not get here."); break;
766 /* Must return something to make the compiler happy. This is clearly an
773 ir_constant::get_array_element(unsigned i) const
775 assert(this->type->is_array());
777 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
779 * "Behavior is undefined if a shader subscripts an array with an index
780 * less than 0 or greater than or equal to the size the array was
783 * Most out-of-bounds accesses are removed before things could get this far.
784 * There are cases where non-constant array index values can get constant
789 else if (i >= this->type->length)
790 i = this->type->length - 1;
792 return array_elements[i];
796 ir_constant::get_record_field(const char *name)
798 int idx = this->type->field_index(name);
803 if (this->components.is_empty())
806 exec_node *node = this->components.head;
807 for (int i = 0; i < idx; i++) {
810 /* If the end of the list is encountered before the element matching the
811 * requested field is found, return NULL.
813 if (node->is_tail_sentinel())
817 return (ir_constant *) node;
822 ir_constant::has_value(const ir_constant *c) const
824 if (this->type != c->type)
827 if (this->type->is_array()) {
828 for (unsigned i = 0; i < this->type->length; i++) {
829 if (!this->array_elements[i]->has_value(c->array_elements[i]))
835 if (this->type->base_type == GLSL_TYPE_STRUCT) {
836 const exec_node *a_node = this->components.head;
837 const exec_node *b_node = c->components.head;
839 while (!a_node->is_tail_sentinel()) {
840 assert(!b_node->is_tail_sentinel());
842 const ir_constant *const a_field = (ir_constant *) a_node;
843 const ir_constant *const b_field = (ir_constant *) b_node;
845 if (!a_field->has_value(b_field))
848 a_node = a_node->next;
849 b_node = b_node->next;
855 for (unsigned i = 0; i < this->type->components(); i++) {
856 switch (this->type->base_type) {
858 if (this->value.u[i] != c->value.u[i])
862 if (this->value.i[i] != c->value.i[i])
865 case GLSL_TYPE_FLOAT:
866 if (this->value.f[i] != c->value.f[i])
870 if (this->value.b[i] != c->value.b[i])
874 assert(!"Should not get here.");
883 ir_constant::is_zero() const
885 if (!this->type->is_scalar() && !this->type->is_vector())
888 for (unsigned c = 0; c < this->type->vector_elements; c++) {
889 switch (this->type->base_type) {
890 case GLSL_TYPE_FLOAT:
891 if (this->value.f[c] != 0.0)
895 if (this->value.i[c] != 0)
899 if (this->value.u[c] != 0)
903 if (this->value.b[c] != false)
907 /* The only other base types are structures, arrays, and samplers.
908 * Samplers cannot be constants, and the others should have been
909 * filtered out above.
911 assert(!"Should not get here.");
920 ir_constant::is_one() const
922 if (!this->type->is_scalar() && !this->type->is_vector())
925 for (unsigned c = 0; c < this->type->vector_elements; c++) {
926 switch (this->type->base_type) {
927 case GLSL_TYPE_FLOAT:
928 if (this->value.f[c] != 1.0)
932 if (this->value.i[c] != 1)
936 if (this->value.u[c] != 1)
940 if (this->value.b[c] != true)
944 /* The only other base types are structures, arrays, and samplers.
945 * Samplers cannot be constants, and the others should have been
946 * filtered out above.
948 assert(!"Should not get here.");
957 ir_constant::is_negative_one() const
959 if (!this->type->is_scalar() && !this->type->is_vector())
962 if (this->type->is_boolean())
965 for (unsigned c = 0; c < this->type->vector_elements; c++) {
966 switch (this->type->base_type) {
967 case GLSL_TYPE_FLOAT:
968 if (this->value.f[c] != -1.0)
972 if (this->value.i[c] != -1)
976 if (int(this->value.u[c]) != -1)
980 /* The only other base types are structures, arrays, samplers, and
981 * booleans. Samplers cannot be constants, and the others should
982 * have been filtered out above.
984 assert(!"Should not get here.");
994 this->ir_type = ir_type_loop;
995 this->cmp = ir_unop_neg;
998 this->increment = NULL;
999 this->counter = NULL;
1003 ir_dereference_variable::ir_dereference_variable(ir_variable *var)
1005 this->ir_type = ir_type_dereference_variable;
1007 this->type = (var != NULL) ? var->type : glsl_type::error_type;
1011 ir_dereference_array::ir_dereference_array(ir_rvalue *value,
1012 ir_rvalue *array_index)
1014 this->ir_type = ir_type_dereference_array;
1015 this->array_index = array_index;
1016 this->set_array(value);
1020 ir_dereference_array::ir_dereference_array(ir_variable *var,
1021 ir_rvalue *array_index)
1023 void *ctx = talloc_parent(var);
1025 this->ir_type = ir_type_dereference_array;
1026 this->array_index = array_index;
1027 this->set_array(new(ctx) ir_dereference_variable(var));
1032 ir_dereference_array::set_array(ir_rvalue *value)
1034 this->array = value;
1035 this->type = glsl_type::error_type;
1037 if (this->array != NULL) {
1038 const glsl_type *const vt = this->array->type;
1040 if (vt->is_array()) {
1041 type = vt->element_type();
1042 } else if (vt->is_matrix()) {
1043 type = vt->column_type();
1044 } else if (vt->is_vector()) {
1045 type = vt->get_base_type();
1051 ir_dereference_record::ir_dereference_record(ir_rvalue *value,
1054 this->ir_type = ir_type_dereference_record;
1055 this->record = value;
1056 this->field = talloc_strdup(this, field);
1057 this->type = (this->record != NULL)
1058 ? this->record->type->field_type(field) : glsl_type::error_type;
1062 ir_dereference_record::ir_dereference_record(ir_variable *var,
1065 void *ctx = talloc_parent(var);
1067 this->ir_type = ir_type_dereference_record;
1068 this->record = new(ctx) ir_dereference_variable(var);
1069 this->field = talloc_strdup(this, field);
1070 this->type = (this->record != NULL)
1071 ? this->record->type->field_type(field) : glsl_type::error_type;
1074 bool type_contains_sampler(const glsl_type *type)
1076 if (type->is_array()) {
1077 return type_contains_sampler(type->fields.array);
1078 } else if (type->is_record()) {
1079 for (unsigned int i = 0; i < type->length; i++) {
1080 if (type_contains_sampler(type->fields.structure[i].type))
1085 return type->is_sampler();
1090 ir_dereference::is_lvalue()
1092 ir_variable *var = this->variable_referenced();
1094 /* Every l-value derference chain eventually ends in a variable.
1096 if ((var == NULL) || var->read_only)
1099 if (this->type->is_array() && !var->array_lvalue)
1102 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1104 * "Samplers cannot be treated as l-values; hence cannot be used
1105 * as out or inout function parameters, nor can they be
1108 if (type_contains_sampler(this->type))
1115 const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };
1117 const char *ir_texture::opcode_string()
1119 assert((unsigned int) op <=
1120 sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
1121 return tex_opcode_strs[op];
1125 ir_texture::get_opcode(const char *str)
1127 const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
1128 for (int op = 0; op < count; op++) {
1129 if (strcmp(str, tex_opcode_strs[op]) == 0)
1130 return (ir_texture_opcode) op;
1132 return (ir_texture_opcode) -1;
1137 ir_texture::set_sampler(ir_dereference *sampler)
1139 assert(sampler != NULL);
1140 this->sampler = sampler;
1142 switch (sampler->type->sampler_type) {
1143 case GLSL_TYPE_FLOAT:
1144 this->type = glsl_type::vec4_type;
1147 this->type = glsl_type::ivec4_type;
1149 case GLSL_TYPE_UINT:
1150 this->type = glsl_type::uvec4_type;
1157 ir_swizzle::init_mask(const unsigned *comp, unsigned count)
1159 assert((count >= 1) && (count <= 4));
1161 memset(&this->mask, 0, sizeof(this->mask));
1162 this->mask.num_components = count;
1164 unsigned dup_mask = 0;
1167 assert(comp[3] <= 3);
1168 dup_mask |= (1U << comp[3])
1169 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
1170 this->mask.w = comp[3];
1173 assert(comp[2] <= 3);
1174 dup_mask |= (1U << comp[2])
1175 & ((1U << comp[0]) | (1U << comp[1]));
1176 this->mask.z = comp[2];
1179 assert(comp[1] <= 3);
1180 dup_mask |= (1U << comp[1])
1181 & ((1U << comp[0]));
1182 this->mask.y = comp[1];
1185 assert(comp[0] <= 3);
1186 this->mask.x = comp[0];
1189 this->mask.has_duplicates = dup_mask != 0;
1191 /* Based on the number of elements in the swizzle and the base type
1192 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1193 * generate the type of the resulting value.
1195 type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
1198 ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
1199 unsigned w, unsigned count)
1202 const unsigned components[4] = { x, y, z, w };
1203 this->ir_type = ir_type_swizzle;
1204 this->init_mask(components, count);
1207 ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
1211 this->ir_type = ir_type_swizzle;
1212 this->init_mask(comp, count);
1215 ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
1217 this->ir_type = ir_type_swizzle;
1220 this->type = glsl_type::get_instance(val->type->base_type,
1221 mask.num_components, 1);
1230 ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
1232 void *ctx = talloc_parent(val);
1234 /* For each possible swizzle character, this table encodes the value in
1235 * \c idx_map that represents the 0th element of the vector. For invalid
1236 * swizzle characters (e.g., 'k'), a special value is used that will allow
1237 * detection of errors.
1239 static const unsigned char base_idx[26] = {
1240 /* a b c d e f g h i j k l m */
1241 R, R, I, I, I, I, R, I, I, I, I, I, I,
1242 /* n o p q r s t u v w x y z */
1243 I, I, S, S, R, S, S, I, I, X, X, X, X
1246 /* Each valid swizzle character has an entry in the previous table. This
1247 * table encodes the base index encoded in the previous table plus the actual
1248 * index of the swizzle character. When processing swizzles, the first
1249 * character in the string is indexed in the previous table. Each character
1250 * in the string is indexed in this table, and the value found there has the
1251 * value form the first table subtracted. The result must be on the range
1254 * For example, the string "wzyx" will get X from the first table. Each of
1255 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1256 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1258 * The string "wzrg" will get X from the first table. Each of the characters
1259 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1260 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1261 * [0,3], the error is detected.
1263 static const unsigned char idx_map[26] = {
1264 /* a b c d e f g h i j k l m */
1265 R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
1266 /* n o p q r s t u v w x y z */
1267 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
1270 int swiz_idx[4] = { 0, 0, 0, 0 };
1274 /* Validate the first character in the swizzle string and look up the base
1275 * index value as described above.
1277 if ((str[0] < 'a') || (str[0] > 'z'))
1280 const unsigned base = base_idx[str[0] - 'a'];
1283 for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
1284 /* Validate the next character, and, as described above, convert it to a
1287 if ((str[i] < 'a') || (str[i] > 'z'))
1290 swiz_idx[i] = idx_map[str[i] - 'a'] - base;
1291 if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
1298 return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
1308 ir_swizzle::variable_referenced()
1310 return this->val->variable_referenced();
1314 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
1315 ir_variable_mode mode)
1316 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1317 mode(mode), interpolation(ir_var_smooth), array_lvalue(false)
1319 this->ir_type = ir_type_variable;
1321 this->name = talloc_strdup(this, name);
1322 this->explicit_location = false;
1323 this->location = -1;
1324 this->warn_extension = NULL;
1325 this->constant_value = NULL;
1326 this->origin_upper_left = false;
1327 this->pixel_center_integer = false;
1330 if (type && type->base_type == GLSL_TYPE_SAMPLER)
1331 this->read_only = true;
1336 ir_variable::interpolation_string() const
1338 switch (this->interpolation) {
1339 case ir_var_smooth: return "smooth";
1340 case ir_var_flat: return "flat";
1341 case ir_var_noperspective: return "noperspective";
1344 assert(!"Should not get here.");
1350 ir_variable::component_slots() const
1352 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1353 return this->type->component_slots();
1357 ir_function_signature::ir_function_signature(const glsl_type *return_type)
1358 : return_type(return_type), is_defined(false), _function(NULL)
1360 this->ir_type = ir_type_function_signature;
1361 this->is_builtin = false;
1366 ir_function_signature::qualifiers_match(exec_list *params)
1368 exec_list_iterator iter_a = parameters.iterator();
1369 exec_list_iterator iter_b = params->iterator();
1371 /* check that the qualifiers match. */
1372 while (iter_a.has_next()) {
1373 ir_variable *a = (ir_variable *)iter_a.get();
1374 ir_variable *b = (ir_variable *)iter_b.get();
1376 if (a->read_only != b->read_only ||
1377 a->mode != b->mode ||
1378 a->interpolation != b->interpolation ||
1379 a->centroid != b->centroid) {
1381 /* parameter a's qualifiers don't match */
1393 ir_function_signature::replace_parameters(exec_list *new_params)
1395 /* Destroy all of the previous parameter information. If the previous
1396 * parameter information comes from the function prototype, it may either
1397 * specify incorrect parameter names or not have names at all.
1399 foreach_iter(exec_list_iterator, iter, parameters) {
1400 assert(((ir_instruction *) iter.get())->as_variable() != NULL);
1405 new_params->move_nodes_to(¶meters);
1409 ir_function::ir_function(const char *name)
1411 this->ir_type = ir_type_function;
1412 this->name = talloc_strdup(this, name);
1417 ir_function::has_user_signature()
1419 foreach_list(n, &this->signatures) {
1420 ir_function_signature *const sig = (ir_function_signature *) n;
1421 if (!sig->is_builtin)
1429 ir_call::get_error_instruction(void *ctx)
1431 ir_call *call = new(ctx) ir_call;
1433 call->type = glsl_type::error_type;
1438 ir_call::set_callee(ir_function_signature *sig)
1440 assert((this->type == NULL) || (this->type == sig->return_type));
1446 visit_exec_list(exec_list *list, ir_visitor *visitor)
1448 foreach_iter(exec_list_iterator, iter, *list) {
1449 ((ir_instruction *)iter.get())->accept(visitor);
1455 steal_memory(ir_instruction *ir, void *new_ctx)
1457 ir_variable *var = ir->as_variable();
1458 ir_constant *constant = ir->as_constant();
1459 if (var != NULL && var->constant_value != NULL)
1460 steal_memory(var->constant_value, ir);
1462 /* The components of aggregate constants are not visited by the normal
1463 * visitor, so steal their values by hand.
1465 if (constant != NULL) {
1466 if (constant->type->is_record()) {
1467 foreach_iter(exec_list_iterator, iter, constant->components) {
1468 ir_constant *field = (ir_constant *)iter.get();
1469 steal_memory(field, ir);
1471 } else if (constant->type->is_array()) {
1472 for (unsigned int i = 0; i < constant->type->length; i++) {
1473 steal_memory(constant->array_elements[i], ir);
1478 talloc_steal(new_ctx, ir);
1483 reparent_ir(exec_list *list, void *mem_ctx)
1485 foreach_list(node, list) {
1486 visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
1492 try_min_one(ir_rvalue *ir)
1494 ir_expression *expr = ir->as_expression();
1496 if (!expr || expr->operation != ir_binop_min)
1499 if (expr->operands[0]->is_one())
1500 return expr->operands[1];
1502 if (expr->operands[1]->is_one())
1503 return expr->operands[0];
1509 try_max_zero(ir_rvalue *ir)
1511 ir_expression *expr = ir->as_expression();
1513 if (!expr || expr->operation != ir_binop_max)
1516 if (expr->operands[0]->is_zero())
1517 return expr->operands[1];
1519 if (expr->operands[1]->is_zero())
1520 return expr->operands[0];
1526 ir_rvalue::as_rvalue_to_saturate()
1528 ir_expression *expr = this->as_expression();
1533 ir_rvalue *max_zero = try_max_zero(expr);
1535 return try_min_one(max_zero);
1537 ir_rvalue *min_one = try_min_one(expr);
1539 return try_max_zero(min_one);