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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);
476 depth_layout_string(ir_depth_layout layout)
479 case ir_depth_layout_none: return "";
480 case ir_depth_layout_any: return "depth_any";
481 case ir_depth_layout_greater: return "depth_greater";
482 case ir_depth_layout_less: return "depth_less";
483 case ir_depth_layout_unchanged: return "depth_unchanged";
491 ir_expression_operation
492 ir_expression::get_operator(const char *str)
494 const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
495 for (int op = 0; op < operator_count; op++) {
496 if (strcmp(str, operator_strs[op]) == 0)
497 return (ir_expression_operation) op;
499 return (ir_expression_operation) -1;
502 ir_constant::ir_constant()
504 this->ir_type = ir_type_constant;
507 ir_constant::ir_constant(const struct glsl_type *type,
508 const ir_constant_data *data)
510 assert((type->base_type >= GLSL_TYPE_UINT)
511 && (type->base_type <= GLSL_TYPE_BOOL));
513 this->ir_type = ir_type_constant;
515 memcpy(& this->value, data, sizeof(this->value));
518 ir_constant::ir_constant(float f)
520 this->ir_type = ir_type_constant;
521 this->type = glsl_type::float_type;
522 this->value.f[0] = f;
523 for (int i = 1; i < 16; i++) {
524 this->value.f[i] = 0;
528 ir_constant::ir_constant(unsigned int u)
530 this->ir_type = ir_type_constant;
531 this->type = glsl_type::uint_type;
532 this->value.u[0] = u;
533 for (int i = 1; i < 16; i++) {
534 this->value.u[i] = 0;
538 ir_constant::ir_constant(int i)
540 this->ir_type = ir_type_constant;
541 this->type = glsl_type::int_type;
542 this->value.i[0] = i;
543 for (int i = 1; i < 16; i++) {
544 this->value.i[i] = 0;
548 ir_constant::ir_constant(bool b)
550 this->ir_type = ir_type_constant;
551 this->type = glsl_type::bool_type;
552 this->value.b[0] = b;
553 for (int i = 1; i < 16; i++) {
554 this->value.b[i] = false;
558 ir_constant::ir_constant(const ir_constant *c, unsigned i)
560 this->ir_type = ir_type_constant;
561 this->type = c->type->get_base_type();
563 switch (this->type->base_type) {
564 case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
565 case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
566 case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
567 case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
568 default: assert(!"Should not get here."); break;
572 ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
574 this->ir_type = ir_type_constant;
577 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
578 || type->is_record() || type->is_array());
580 if (type->is_array()) {
581 this->array_elements = ralloc_array(this, ir_constant *, type->length);
583 foreach_list(node, value_list) {
584 ir_constant *value = (ir_constant *) node;
585 assert(value->as_constant() != NULL);
587 this->array_elements[i++] = value;
592 /* If the constant is a record, the types of each of the entries in
593 * value_list must be a 1-for-1 match with the structure components. Each
594 * entry must also be a constant. Just move the nodes from the value_list
595 * to the list in the ir_constant.
597 /* FINISHME: Should there be some type checking and / or assertions here? */
598 /* FINISHME: Should the new constant take ownership of the nodes from
599 * FINISHME: value_list, or should it make copies?
601 if (type->is_record()) {
602 value_list->move_nodes_to(& this->components);
606 for (unsigned i = 0; i < 16; i++) {
607 this->value.u[i] = 0;
610 ir_constant *value = (ir_constant *) (value_list->head);
612 /* Constructors with exactly one scalar argument are special for vectors
613 * and matrices. For vectors, the scalar value is replicated to fill all
614 * the components. For matrices, the scalar fills the components of the
615 * diagonal while the rest is filled with 0.
617 if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
618 if (type->is_matrix()) {
619 /* Matrix - fill diagonal (rest is already set to 0) */
620 assert(type->base_type == GLSL_TYPE_FLOAT);
621 for (unsigned i = 0; i < type->matrix_columns; i++)
622 this->value.f[i * type->vector_elements + i] = value->value.f[0];
624 /* Vector or scalar - fill all components */
625 switch (type->base_type) {
628 for (unsigned i = 0; i < type->components(); i++)
629 this->value.u[i] = value->value.u[0];
631 case GLSL_TYPE_FLOAT:
632 for (unsigned i = 0; i < type->components(); i++)
633 this->value.f[i] = value->value.f[0];
636 for (unsigned i = 0; i < type->components(); i++)
637 this->value.b[i] = value->value.b[0];
640 assert(!"Should not get here.");
647 if (type->is_matrix() && value->type->is_matrix()) {
648 assert(value->next->is_tail_sentinel());
650 /* From section 5.4.2 of the GLSL 1.20 spec:
651 * "If a matrix is constructed from a matrix, then each component
652 * (column i, row j) in the result that has a corresponding component
653 * (column i, row j) in the argument will be initialized from there."
655 unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
656 unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
657 for (unsigned i = 0; i < cols; i++) {
658 for (unsigned j = 0; j < rows; j++) {
659 const unsigned src = i * value->type->vector_elements + j;
660 const unsigned dst = i * type->vector_elements + j;
661 this->value.f[dst] = value->value.f[src];
665 /* "All other components will be initialized to the identity matrix." */
666 for (unsigned i = cols; i < type->matrix_columns; i++)
667 this->value.f[i * type->vector_elements + i] = 1.0;
672 /* Use each component from each entry in the value_list to initialize one
673 * component of the constant being constructed.
675 for (unsigned i = 0; i < type->components(); /* empty */) {
676 assert(value->as_constant() != NULL);
677 assert(!value->is_tail_sentinel());
679 for (unsigned j = 0; j < value->type->components(); j++) {
680 switch (type->base_type) {
682 this->value.u[i] = value->get_uint_component(j);
685 this->value.i[i] = value->get_int_component(j);
687 case GLSL_TYPE_FLOAT:
688 this->value.f[i] = value->get_float_component(j);
691 this->value.b[i] = value->get_bool_component(j);
694 /* FINISHME: What to do? Exceptions are not the answer.
700 if (i >= type->components())
704 value = (ir_constant *) value->next;
709 ir_constant::zero(void *mem_ctx, const glsl_type *type)
711 assert(type->is_numeric() || type->is_boolean());
713 ir_constant *c = new(mem_ctx) ir_constant;
715 memset(&c->value, 0, sizeof(c->value));
721 ir_constant::get_bool_component(unsigned i) const
723 switch (this->type->base_type) {
724 case GLSL_TYPE_UINT: return this->value.u[i] != 0;
725 case GLSL_TYPE_INT: return this->value.i[i] != 0;
726 case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
727 case GLSL_TYPE_BOOL: return this->value.b[i];
728 default: assert(!"Should not get here."); break;
731 /* Must return something to make the compiler happy. This is clearly an
738 ir_constant::get_float_component(unsigned i) const
740 switch (this->type->base_type) {
741 case GLSL_TYPE_UINT: return (float) this->value.u[i];
742 case GLSL_TYPE_INT: return (float) this->value.i[i];
743 case GLSL_TYPE_FLOAT: return this->value.f[i];
744 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
745 default: assert(!"Should not get here."); break;
748 /* Must return something to make the compiler happy. This is clearly an
755 ir_constant::get_int_component(unsigned i) const
757 switch (this->type->base_type) {
758 case GLSL_TYPE_UINT: return this->value.u[i];
759 case GLSL_TYPE_INT: return this->value.i[i];
760 case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
761 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
762 default: assert(!"Should not get here."); break;
765 /* Must return something to make the compiler happy. This is clearly an
772 ir_constant::get_uint_component(unsigned i) const
774 switch (this->type->base_type) {
775 case GLSL_TYPE_UINT: return this->value.u[i];
776 case GLSL_TYPE_INT: return this->value.i[i];
777 case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
778 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
779 default: assert(!"Should not get here."); break;
782 /* Must return something to make the compiler happy. This is clearly an
789 ir_constant::get_array_element(unsigned i) const
791 assert(this->type->is_array());
793 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
795 * "Behavior is undefined if a shader subscripts an array with an index
796 * less than 0 or greater than or equal to the size the array was
799 * Most out-of-bounds accesses are removed before things could get this far.
800 * There are cases where non-constant array index values can get constant
805 else if (i >= this->type->length)
806 i = this->type->length - 1;
808 return array_elements[i];
812 ir_constant::get_record_field(const char *name)
814 int idx = this->type->field_index(name);
819 if (this->components.is_empty())
822 exec_node *node = this->components.head;
823 for (int i = 0; i < idx; i++) {
826 /* If the end of the list is encountered before the element matching the
827 * requested field is found, return NULL.
829 if (node->is_tail_sentinel())
833 return (ir_constant *) node;
838 ir_constant::has_value(const ir_constant *c) const
840 if (this->type != c->type)
843 if (this->type->is_array()) {
844 for (unsigned i = 0; i < this->type->length; i++) {
845 if (!this->array_elements[i]->has_value(c->array_elements[i]))
851 if (this->type->base_type == GLSL_TYPE_STRUCT) {
852 const exec_node *a_node = this->components.head;
853 const exec_node *b_node = c->components.head;
855 while (!a_node->is_tail_sentinel()) {
856 assert(!b_node->is_tail_sentinel());
858 const ir_constant *const a_field = (ir_constant *) a_node;
859 const ir_constant *const b_field = (ir_constant *) b_node;
861 if (!a_field->has_value(b_field))
864 a_node = a_node->next;
865 b_node = b_node->next;
871 for (unsigned i = 0; i < this->type->components(); i++) {
872 switch (this->type->base_type) {
874 if (this->value.u[i] != c->value.u[i])
878 if (this->value.i[i] != c->value.i[i])
881 case GLSL_TYPE_FLOAT:
882 if (this->value.f[i] != c->value.f[i])
886 if (this->value.b[i] != c->value.b[i])
890 assert(!"Should not get here.");
899 ir_constant::is_zero() const
901 if (!this->type->is_scalar() && !this->type->is_vector())
904 for (unsigned c = 0; c < this->type->vector_elements; c++) {
905 switch (this->type->base_type) {
906 case GLSL_TYPE_FLOAT:
907 if (this->value.f[c] != 0.0)
911 if (this->value.i[c] != 0)
915 if (this->value.u[c] != 0)
919 if (this->value.b[c] != false)
923 /* The only other base types are structures, arrays, and samplers.
924 * Samplers cannot be constants, and the others should have been
925 * filtered out above.
927 assert(!"Should not get here.");
936 ir_constant::is_one() const
938 if (!this->type->is_scalar() && !this->type->is_vector())
941 for (unsigned c = 0; c < this->type->vector_elements; c++) {
942 switch (this->type->base_type) {
943 case GLSL_TYPE_FLOAT:
944 if (this->value.f[c] != 1.0)
948 if (this->value.i[c] != 1)
952 if (this->value.u[c] != 1)
956 if (this->value.b[c] != true)
960 /* The only other base types are structures, arrays, and samplers.
961 * Samplers cannot be constants, and the others should have been
962 * filtered out above.
964 assert(!"Should not get here.");
973 ir_constant::is_negative_one() const
975 if (!this->type->is_scalar() && !this->type->is_vector())
978 if (this->type->is_boolean())
981 for (unsigned c = 0; c < this->type->vector_elements; c++) {
982 switch (this->type->base_type) {
983 case GLSL_TYPE_FLOAT:
984 if (this->value.f[c] != -1.0)
988 if (this->value.i[c] != -1)
992 if (int(this->value.u[c]) != -1)
996 /* The only other base types are structures, arrays, samplers, and
997 * booleans. Samplers cannot be constants, and the others should
998 * have been filtered out above.
1000 assert(!"Should not get here.");
1010 this->ir_type = ir_type_loop;
1011 this->cmp = ir_unop_neg;
1014 this->increment = NULL;
1015 this->counter = NULL;
1019 ir_dereference_variable::ir_dereference_variable(ir_variable *var)
1021 this->ir_type = ir_type_dereference_variable;
1023 this->type = (var != NULL) ? var->type : glsl_type::error_type;
1027 ir_dereference_array::ir_dereference_array(ir_rvalue *value,
1028 ir_rvalue *array_index)
1030 this->ir_type = ir_type_dereference_array;
1031 this->array_index = array_index;
1032 this->set_array(value);
1036 ir_dereference_array::ir_dereference_array(ir_variable *var,
1037 ir_rvalue *array_index)
1039 void *ctx = ralloc_parent(var);
1041 this->ir_type = ir_type_dereference_array;
1042 this->array_index = array_index;
1043 this->set_array(new(ctx) ir_dereference_variable(var));
1048 ir_dereference_array::set_array(ir_rvalue *value)
1050 this->array = value;
1051 this->type = glsl_type::error_type;
1053 if (this->array != NULL) {
1054 const glsl_type *const vt = this->array->type;
1056 if (vt->is_array()) {
1057 type = vt->element_type();
1058 } else if (vt->is_matrix()) {
1059 type = vt->column_type();
1060 } else if (vt->is_vector()) {
1061 type = vt->get_base_type();
1067 ir_dereference_record::ir_dereference_record(ir_rvalue *value,
1070 this->ir_type = ir_type_dereference_record;
1071 this->record = value;
1072 this->field = ralloc_strdup(this, field);
1073 this->type = (this->record != NULL)
1074 ? this->record->type->field_type(field) : glsl_type::error_type;
1078 ir_dereference_record::ir_dereference_record(ir_variable *var,
1081 void *ctx = ralloc_parent(var);
1083 this->ir_type = ir_type_dereference_record;
1084 this->record = new(ctx) ir_dereference_variable(var);
1085 this->field = ralloc_strdup(this, field);
1086 this->type = (this->record != NULL)
1087 ? this->record->type->field_type(field) : glsl_type::error_type;
1091 ir_dereference::is_lvalue()
1093 ir_variable *var = this->variable_referenced();
1095 /* Every l-value derference chain eventually ends in a variable.
1097 if ((var == NULL) || var->read_only)
1100 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1102 * "Samplers cannot be treated as l-values; hence cannot be used
1103 * as out or inout function parameters, nor can they be
1106 if (this->type->contains_sampler())
1113 const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf" };
1115 const char *ir_texture::opcode_string()
1117 assert((unsigned int) op <=
1118 sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
1119 return tex_opcode_strs[op];
1123 ir_texture::get_opcode(const char *str)
1125 const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
1126 for (int op = 0; op < count; op++) {
1127 if (strcmp(str, tex_opcode_strs[op]) == 0)
1128 return (ir_texture_opcode) op;
1130 return (ir_texture_opcode) -1;
1135 ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)
1137 assert(sampler != NULL);
1138 assert(type != NULL);
1139 this->sampler = sampler;
1142 assert(sampler->type->sampler_type == (int) type->base_type);
1143 if (sampler->type->sampler_shadow)
1144 assert(type->vector_elements == 4 || type->vector_elements == 1);
1146 assert(type->vector_elements == 4);
1151 ir_swizzle::init_mask(const unsigned *comp, unsigned count)
1153 assert((count >= 1) && (count <= 4));
1155 memset(&this->mask, 0, sizeof(this->mask));
1156 this->mask.num_components = count;
1158 unsigned dup_mask = 0;
1161 assert(comp[3] <= 3);
1162 dup_mask |= (1U << comp[3])
1163 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
1164 this->mask.w = comp[3];
1167 assert(comp[2] <= 3);
1168 dup_mask |= (1U << comp[2])
1169 & ((1U << comp[0]) | (1U << comp[1]));
1170 this->mask.z = comp[2];
1173 assert(comp[1] <= 3);
1174 dup_mask |= (1U << comp[1])
1175 & ((1U << comp[0]));
1176 this->mask.y = comp[1];
1179 assert(comp[0] <= 3);
1180 this->mask.x = comp[0];
1183 this->mask.has_duplicates = dup_mask != 0;
1185 /* Based on the number of elements in the swizzle and the base type
1186 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1187 * generate the type of the resulting value.
1189 type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
1192 ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
1193 unsigned w, unsigned count)
1196 const unsigned components[4] = { x, y, z, w };
1197 this->ir_type = ir_type_swizzle;
1198 this->init_mask(components, count);
1201 ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
1205 this->ir_type = ir_type_swizzle;
1206 this->init_mask(comp, count);
1209 ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
1211 this->ir_type = ir_type_swizzle;
1214 this->type = glsl_type::get_instance(val->type->base_type,
1215 mask.num_components, 1);
1224 ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
1226 void *ctx = ralloc_parent(val);
1228 /* For each possible swizzle character, this table encodes the value in
1229 * \c idx_map that represents the 0th element of the vector. For invalid
1230 * swizzle characters (e.g., 'k'), a special value is used that will allow
1231 * detection of errors.
1233 static const unsigned char base_idx[26] = {
1234 /* a b c d e f g h i j k l m */
1235 R, R, I, I, I, I, R, I, I, I, I, I, I,
1236 /* n o p q r s t u v w x y z */
1237 I, I, S, S, R, S, S, I, I, X, X, X, X
1240 /* Each valid swizzle character has an entry in the previous table. This
1241 * table encodes the base index encoded in the previous table plus the actual
1242 * index of the swizzle character. When processing swizzles, the first
1243 * character in the string is indexed in the previous table. Each character
1244 * in the string is indexed in this table, and the value found there has the
1245 * value form the first table subtracted. The result must be on the range
1248 * For example, the string "wzyx" will get X from the first table. Each of
1249 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1250 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1252 * The string "wzrg" will get X from the first table. Each of the characters
1253 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1254 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1255 * [0,3], the error is detected.
1257 static const unsigned char idx_map[26] = {
1258 /* a b c d e f g h i j k l m */
1259 R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
1260 /* n o p q r s t u v w x y z */
1261 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
1264 int swiz_idx[4] = { 0, 0, 0, 0 };
1268 /* Validate the first character in the swizzle string and look up the base
1269 * index value as described above.
1271 if ((str[0] < 'a') || (str[0] > 'z'))
1274 const unsigned base = base_idx[str[0] - 'a'];
1277 for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
1278 /* Validate the next character, and, as described above, convert it to a
1281 if ((str[i] < 'a') || (str[i] > 'z'))
1284 swiz_idx[i] = idx_map[str[i] - 'a'] - base;
1285 if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
1292 return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
1302 ir_swizzle::variable_referenced()
1304 return this->val->variable_referenced();
1308 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
1309 ir_variable_mode mode)
1310 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1311 mode(mode), interpolation(ir_var_smooth)
1313 this->ir_type = ir_type_variable;
1315 this->name = ralloc_strdup(this, name);
1316 this->explicit_location = false;
1317 this->location = -1;
1318 this->warn_extension = NULL;
1319 this->constant_value = NULL;
1320 this->origin_upper_left = false;
1321 this->pixel_center_integer = false;
1322 this->depth_layout = ir_depth_layout_none;
1325 if (type && type->base_type == GLSL_TYPE_SAMPLER)
1326 this->read_only = true;
1331 ir_variable::interpolation_string() const
1333 switch (this->interpolation) {
1334 case ir_var_smooth: return "smooth";
1335 case ir_var_flat: return "flat";
1336 case ir_var_noperspective: return "noperspective";
1339 assert(!"Should not get here.");
1345 ir_variable::component_slots() const
1347 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1348 return this->type->component_slots();
1352 ir_function_signature::ir_function_signature(const glsl_type *return_type)
1353 : return_type(return_type), is_defined(false), _function(NULL)
1355 this->ir_type = ir_type_function_signature;
1356 this->is_builtin = false;
1361 modes_match(unsigned a, unsigned b)
1366 /* Accept "in" vs. "const in" */
1367 if ((a == ir_var_const_in && b == ir_var_in) ||
1368 (b == ir_var_const_in && a == ir_var_in))
1376 ir_function_signature::qualifiers_match(exec_list *params)
1378 exec_list_iterator iter_a = parameters.iterator();
1379 exec_list_iterator iter_b = params->iterator();
1381 /* check that the qualifiers match. */
1382 while (iter_a.has_next()) {
1383 ir_variable *a = (ir_variable *)iter_a.get();
1384 ir_variable *b = (ir_variable *)iter_b.get();
1386 if (a->read_only != b->read_only ||
1387 !modes_match(a->mode, b->mode) ||
1388 a->interpolation != b->interpolation ||
1389 a->centroid != b->centroid) {
1391 /* parameter a's qualifiers don't match */
1403 ir_function_signature::replace_parameters(exec_list *new_params)
1405 /* Destroy all of the previous parameter information. If the previous
1406 * parameter information comes from the function prototype, it may either
1407 * specify incorrect parameter names or not have names at all.
1409 foreach_iter(exec_list_iterator, iter, parameters) {
1410 assert(((ir_instruction *) iter.get())->as_variable() != NULL);
1415 new_params->move_nodes_to(¶meters);
1419 ir_function::ir_function(const char *name)
1421 this->ir_type = ir_type_function;
1422 this->name = ralloc_strdup(this, name);
1427 ir_function::has_user_signature()
1429 foreach_list(n, &this->signatures) {
1430 ir_function_signature *const sig = (ir_function_signature *) n;
1431 if (!sig->is_builtin)
1439 ir_call::get_error_instruction(void *ctx)
1441 ir_call *call = new(ctx) ir_call;
1443 call->type = glsl_type::error_type;
1448 ir_call::set_callee(ir_function_signature *sig)
1450 assert((this->type == NULL) || (this->type == sig->return_type));
1456 visit_exec_list(exec_list *list, ir_visitor *visitor)
1458 foreach_iter(exec_list_iterator, iter, *list) {
1459 ((ir_instruction *)iter.get())->accept(visitor);
1465 steal_memory(ir_instruction *ir, void *new_ctx)
1467 ir_variable *var = ir->as_variable();
1468 ir_constant *constant = ir->as_constant();
1469 if (var != NULL && var->constant_value != NULL)
1470 steal_memory(var->constant_value, ir);
1472 /* The components of aggregate constants are not visited by the normal
1473 * visitor, so steal their values by hand.
1475 if (constant != NULL) {
1476 if (constant->type->is_record()) {
1477 foreach_iter(exec_list_iterator, iter, constant->components) {
1478 ir_constant *field = (ir_constant *)iter.get();
1479 steal_memory(field, ir);
1481 } else if (constant->type->is_array()) {
1482 for (unsigned int i = 0; i < constant->type->length; i++) {
1483 steal_memory(constant->array_elements[i], ir);
1488 ralloc_steal(new_ctx, ir);
1493 reparent_ir(exec_list *list, void *mem_ctx)
1495 foreach_list(node, list) {
1496 visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
1502 try_min_one(ir_rvalue *ir)
1504 ir_expression *expr = ir->as_expression();
1506 if (!expr || expr->operation != ir_binop_min)
1509 if (expr->operands[0]->is_one())
1510 return expr->operands[1];
1512 if (expr->operands[1]->is_one())
1513 return expr->operands[0];
1519 try_max_zero(ir_rvalue *ir)
1521 ir_expression *expr = ir->as_expression();
1523 if (!expr || expr->operation != ir_binop_max)
1526 if (expr->operands[0]->is_zero())
1527 return expr->operands[1];
1529 if (expr->operands[1]->is_zero())
1530 return expr->operands[0];
1536 ir_rvalue::as_rvalue_to_saturate()
1538 ir_expression *expr = this->as_expression();
1543 ir_rvalue *max_zero = try_max_zero(expr);
1545 return try_min_one(max_zero);
1547 ir_rvalue *min_one = try_min_one(expr);
1549 return try_max_zero(min_one);