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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;
276 case ir_unop_bitcast_f2i:
277 this->type = glsl_type::get_instance(GLSL_TYPE_INT,
278 op0->type->vector_elements, 1);
284 case ir_unop_bitcast_i2f:
285 case ir_unop_bitcast_u2f:
286 this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
287 op0->type->vector_elements, 1);
292 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
293 op0->type->vector_elements, 1);
297 case ir_unop_bitcast_f2u:
298 this->type = glsl_type::get_instance(GLSL_TYPE_UINT,
299 op0->type->vector_elements, 1);
303 this->type = glsl_type::float_type;
307 this->type = glsl_type::bool_type;
311 assert(!"not reached: missing automatic type setup for ir_expression");
312 this->type = op0->type;
317 ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
319 this->ir_type = ir_type_expression;
321 this->operation = ir_expression_operation(op);
322 this->operands[0] = op0;
323 this->operands[1] = op1;
324 this->operands[2] = NULL;
325 this->operands[3] = NULL;
327 assert(op > ir_last_unop);
329 switch (this->operation) {
330 case ir_binop_all_equal:
331 case ir_binop_any_nequal:
332 this->type = glsl_type::bool_type;
343 if (op0->type->is_scalar()) {
344 this->type = op1->type;
345 } else if (op1->type->is_scalar()) {
346 this->type = op0->type;
348 /* FINISHME: matrix types */
349 assert(!op0->type->is_matrix() && !op1->type->is_matrix());
350 assert(op0->type == op1->type);
351 this->type = op0->type;
355 case ir_binop_logic_and:
356 case ir_binop_logic_xor:
357 case ir_binop_logic_or:
358 case ir_binop_bit_and:
359 case ir_binop_bit_xor:
360 case ir_binop_bit_or:
361 if (op0->type->is_scalar()) {
362 this->type = op1->type;
363 } else if (op1->type->is_scalar()) {
364 this->type = op0->type;
369 case ir_binop_nequal:
370 case ir_binop_lequal:
371 case ir_binop_gequal:
373 case ir_binop_greater:
374 assert(op0->type == op1->type);
375 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
376 op0->type->vector_elements, 1);
380 this->type = glsl_type::float_type;
383 case ir_binop_lshift:
384 case ir_binop_rshift:
385 this->type = op0->type;
389 assert(!"not reached: missing automatic type setup for ir_expression");
390 this->type = glsl_type::float_type;
395 ir_expression::get_num_operands(ir_expression_operation op)
397 assert(op <= ir_last_opcode);
399 if (op <= ir_last_unop)
402 if (op <= ir_last_binop)
405 if (op == ir_quadop_vector)
412 static const char *const operator_strs[] = {
479 const char *ir_expression::operator_string(ir_expression_operation op)
481 assert((unsigned int) op < Elements(operator_strs));
482 assert(Elements(operator_strs) == (ir_quadop_vector + 1));
483 return operator_strs[op];
486 const char *ir_expression::operator_string()
488 return operator_string(this->operation);
492 depth_layout_string(ir_depth_layout layout)
495 case ir_depth_layout_none: return "";
496 case ir_depth_layout_any: return "depth_any";
497 case ir_depth_layout_greater: return "depth_greater";
498 case ir_depth_layout_less: return "depth_less";
499 case ir_depth_layout_unchanged: return "depth_unchanged";
507 ir_expression_operation
508 ir_expression::get_operator(const char *str)
510 const int operator_count = sizeof(operator_strs) / sizeof(operator_strs[0]);
511 for (int op = 0; op < operator_count; op++) {
512 if (strcmp(str, operator_strs[op]) == 0)
513 return (ir_expression_operation) op;
515 return (ir_expression_operation) -1;
518 ir_constant::ir_constant()
520 this->ir_type = ir_type_constant;
523 ir_constant::ir_constant(const struct glsl_type *type,
524 const ir_constant_data *data)
526 assert((type->base_type >= GLSL_TYPE_UINT)
527 && (type->base_type <= GLSL_TYPE_BOOL));
529 this->ir_type = ir_type_constant;
531 memcpy(& this->value, data, sizeof(this->value));
534 ir_constant::ir_constant(float f)
536 this->ir_type = ir_type_constant;
537 this->type = glsl_type::float_type;
538 this->value.f[0] = f;
539 for (int i = 1; i < 16; i++) {
540 this->value.f[i] = 0;
544 ir_constant::ir_constant(unsigned int u)
546 this->ir_type = ir_type_constant;
547 this->type = glsl_type::uint_type;
548 this->value.u[0] = u;
549 for (int i = 1; i < 16; i++) {
550 this->value.u[i] = 0;
554 ir_constant::ir_constant(int i)
556 this->ir_type = ir_type_constant;
557 this->type = glsl_type::int_type;
558 this->value.i[0] = i;
559 for (int i = 1; i < 16; i++) {
560 this->value.i[i] = 0;
564 ir_constant::ir_constant(bool b)
566 this->ir_type = ir_type_constant;
567 this->type = glsl_type::bool_type;
568 this->value.b[0] = b;
569 for (int i = 1; i < 16; i++) {
570 this->value.b[i] = false;
574 ir_constant::ir_constant(const ir_constant *c, unsigned i)
576 this->ir_type = ir_type_constant;
577 this->type = c->type->get_base_type();
579 switch (this->type->base_type) {
580 case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
581 case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
582 case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
583 case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
584 default: assert(!"Should not get here."); break;
588 ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
590 this->ir_type = ir_type_constant;
593 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
594 || type->is_record() || type->is_array());
596 if (type->is_array()) {
597 this->array_elements = ralloc_array(this, ir_constant *, type->length);
599 foreach_list(node, value_list) {
600 ir_constant *value = (ir_constant *) node;
601 assert(value->as_constant() != NULL);
603 this->array_elements[i++] = value;
608 /* If the constant is a record, the types of each of the entries in
609 * value_list must be a 1-for-1 match with the structure components. Each
610 * entry must also be a constant. Just move the nodes from the value_list
611 * to the list in the ir_constant.
613 /* FINISHME: Should there be some type checking and / or assertions here? */
614 /* FINISHME: Should the new constant take ownership of the nodes from
615 * FINISHME: value_list, or should it make copies?
617 if (type->is_record()) {
618 value_list->move_nodes_to(& this->components);
622 for (unsigned i = 0; i < 16; i++) {
623 this->value.u[i] = 0;
626 ir_constant *value = (ir_constant *) (value_list->head);
628 /* Constructors with exactly one scalar argument are special for vectors
629 * and matrices. For vectors, the scalar value is replicated to fill all
630 * the components. For matrices, the scalar fills the components of the
631 * diagonal while the rest is filled with 0.
633 if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
634 if (type->is_matrix()) {
635 /* Matrix - fill diagonal (rest is already set to 0) */
636 assert(type->base_type == GLSL_TYPE_FLOAT);
637 for (unsigned i = 0; i < type->matrix_columns; i++)
638 this->value.f[i * type->vector_elements + i] = value->value.f[0];
640 /* Vector or scalar - fill all components */
641 switch (type->base_type) {
644 for (unsigned i = 0; i < type->components(); i++)
645 this->value.u[i] = value->value.u[0];
647 case GLSL_TYPE_FLOAT:
648 for (unsigned i = 0; i < type->components(); i++)
649 this->value.f[i] = value->value.f[0];
652 for (unsigned i = 0; i < type->components(); i++)
653 this->value.b[i] = value->value.b[0];
656 assert(!"Should not get here.");
663 if (type->is_matrix() && value->type->is_matrix()) {
664 assert(value->next->is_tail_sentinel());
666 /* From section 5.4.2 of the GLSL 1.20 spec:
667 * "If a matrix is constructed from a matrix, then each component
668 * (column i, row j) in the result that has a corresponding component
669 * (column i, row j) in the argument will be initialized from there."
671 unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
672 unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
673 for (unsigned i = 0; i < cols; i++) {
674 for (unsigned j = 0; j < rows; j++) {
675 const unsigned src = i * value->type->vector_elements + j;
676 const unsigned dst = i * type->vector_elements + j;
677 this->value.f[dst] = value->value.f[src];
681 /* "All other components will be initialized to the identity matrix." */
682 for (unsigned i = cols; i < type->matrix_columns; i++)
683 this->value.f[i * type->vector_elements + i] = 1.0;
688 /* Use each component from each entry in the value_list to initialize one
689 * component of the constant being constructed.
691 for (unsigned i = 0; i < type->components(); /* empty */) {
692 assert(value->as_constant() != NULL);
693 assert(!value->is_tail_sentinel());
695 for (unsigned j = 0; j < value->type->components(); j++) {
696 switch (type->base_type) {
698 this->value.u[i] = value->get_uint_component(j);
701 this->value.i[i] = value->get_int_component(j);
703 case GLSL_TYPE_FLOAT:
704 this->value.f[i] = value->get_float_component(j);
707 this->value.b[i] = value->get_bool_component(j);
710 /* FINISHME: What to do? Exceptions are not the answer.
716 if (i >= type->components())
720 value = (ir_constant *) value->next;
725 ir_constant::zero(void *mem_ctx, const glsl_type *type)
727 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
728 || type->is_record() || type->is_array());
730 ir_constant *c = new(mem_ctx) ir_constant;
732 memset(&c->value, 0, sizeof(c->value));
734 if (type->is_array()) {
735 c->array_elements = ralloc_array(c, ir_constant *, type->length);
737 for (unsigned i = 0; i < type->length; i++)
738 c->array_elements[i] = ir_constant::zero(c, type->element_type());
741 if (type->is_record()) {
742 for (unsigned i = 0; i < type->length; i++) {
743 ir_constant *comp = ir_constant::zero(mem_ctx, type->fields.structure[i].type);
744 c->components.push_tail(comp);
752 ir_constant::get_bool_component(unsigned i) const
754 switch (this->type->base_type) {
755 case GLSL_TYPE_UINT: return this->value.u[i] != 0;
756 case GLSL_TYPE_INT: return this->value.i[i] != 0;
757 case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
758 case GLSL_TYPE_BOOL: return this->value.b[i];
759 default: assert(!"Should not get here."); break;
762 /* Must return something to make the compiler happy. This is clearly an
769 ir_constant::get_float_component(unsigned i) const
771 switch (this->type->base_type) {
772 case GLSL_TYPE_UINT: return (float) this->value.u[i];
773 case GLSL_TYPE_INT: return (float) this->value.i[i];
774 case GLSL_TYPE_FLOAT: return this->value.f[i];
775 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
776 default: assert(!"Should not get here."); break;
779 /* Must return something to make the compiler happy. This is clearly an
786 ir_constant::get_int_component(unsigned i) const
788 switch (this->type->base_type) {
789 case GLSL_TYPE_UINT: return this->value.u[i];
790 case GLSL_TYPE_INT: return this->value.i[i];
791 case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
792 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
793 default: assert(!"Should not get here."); break;
796 /* Must return something to make the compiler happy. This is clearly an
803 ir_constant::get_uint_component(unsigned i) const
805 switch (this->type->base_type) {
806 case GLSL_TYPE_UINT: return this->value.u[i];
807 case GLSL_TYPE_INT: return this->value.i[i];
808 case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
809 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
810 default: assert(!"Should not get here."); break;
813 /* Must return something to make the compiler happy. This is clearly an
820 ir_constant::get_array_element(unsigned i) const
822 assert(this->type->is_array());
824 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
826 * "Behavior is undefined if a shader subscripts an array with an index
827 * less than 0 or greater than or equal to the size the array was
830 * Most out-of-bounds accesses are removed before things could get this far.
831 * There are cases where non-constant array index values can get constant
836 else if (i >= this->type->length)
837 i = this->type->length - 1;
839 return array_elements[i];
843 ir_constant::get_record_field(const char *name)
845 int idx = this->type->field_index(name);
850 if (this->components.is_empty())
853 exec_node *node = this->components.head;
854 for (int i = 0; i < idx; i++) {
857 /* If the end of the list is encountered before the element matching the
858 * requested field is found, return NULL.
860 if (node->is_tail_sentinel())
864 return (ir_constant *) node;
868 ir_constant::copy_offset(ir_constant *src, int offset)
870 switch (this->type->base_type) {
873 case GLSL_TYPE_FLOAT:
874 case GLSL_TYPE_BOOL: {
875 unsigned int size = src->type->components();
876 assert (size <= this->type->components() - offset);
877 for (unsigned int i=0; i<size; i++) {
878 switch (this->type->base_type) {
880 value.u[i+offset] = src->get_uint_component(i);
883 value.i[i+offset] = src->get_int_component(i);
885 case GLSL_TYPE_FLOAT:
886 value.f[i+offset] = src->get_float_component(i);
889 value.b[i+offset] = src->get_bool_component(i);
891 default: // Shut up the compiler
898 case GLSL_TYPE_STRUCT: {
899 assert (src->type == this->type);
900 this->components.make_empty();
901 foreach_list(node, &src->components) {
902 ir_constant *const orig = (ir_constant *) node;
904 this->components.push_tail(orig->clone(this, NULL));
909 case GLSL_TYPE_ARRAY: {
910 assert (src->type == this->type);
911 for (unsigned i = 0; i < this->type->length; i++) {
912 this->array_elements[i] = src->array_elements[i]->clone(this, NULL);
918 assert(!"Should not get here.");
924 ir_constant::copy_masked_offset(ir_constant *src, int offset, unsigned int mask)
926 assert (!type->is_array() && !type->is_record());
928 if (!type->is_vector() && !type->is_matrix()) {
934 for (int i=0; i<4; i++) {
935 if (mask & (1 << i)) {
936 switch (this->type->base_type) {
938 value.u[i+offset] = src->get_uint_component(id++);
941 value.i[i+offset] = src->get_int_component(id++);
943 case GLSL_TYPE_FLOAT:
944 value.f[i+offset] = src->get_float_component(id++);
947 value.b[i+offset] = src->get_bool_component(id++);
950 assert(!"Should not get here.");
958 ir_constant::has_value(const ir_constant *c) const
960 if (this->type != c->type)
963 if (this->type->is_array()) {
964 for (unsigned i = 0; i < this->type->length; i++) {
965 if (!this->array_elements[i]->has_value(c->array_elements[i]))
971 if (this->type->base_type == GLSL_TYPE_STRUCT) {
972 const exec_node *a_node = this->components.head;
973 const exec_node *b_node = c->components.head;
975 while (!a_node->is_tail_sentinel()) {
976 assert(!b_node->is_tail_sentinel());
978 const ir_constant *const a_field = (ir_constant *) a_node;
979 const ir_constant *const b_field = (ir_constant *) b_node;
981 if (!a_field->has_value(b_field))
984 a_node = a_node->next;
985 b_node = b_node->next;
991 for (unsigned i = 0; i < this->type->components(); i++) {
992 switch (this->type->base_type) {
994 if (this->value.u[i] != c->value.u[i])
998 if (this->value.i[i] != c->value.i[i])
1001 case GLSL_TYPE_FLOAT:
1002 if (this->value.f[i] != c->value.f[i])
1005 case GLSL_TYPE_BOOL:
1006 if (this->value.b[i] != c->value.b[i])
1010 assert(!"Should not get here.");
1019 ir_constant::is_zero() const
1021 if (!this->type->is_scalar() && !this->type->is_vector())
1024 for (unsigned c = 0; c < this->type->vector_elements; c++) {
1025 switch (this->type->base_type) {
1026 case GLSL_TYPE_FLOAT:
1027 if (this->value.f[c] != 0.0)
1031 if (this->value.i[c] != 0)
1034 case GLSL_TYPE_UINT:
1035 if (this->value.u[c] != 0)
1038 case GLSL_TYPE_BOOL:
1039 if (this->value.b[c] != false)
1043 /* The only other base types are structures, arrays, and samplers.
1044 * Samplers cannot be constants, and the others should have been
1045 * filtered out above.
1047 assert(!"Should not get here.");
1056 ir_constant::is_one() const
1058 if (!this->type->is_scalar() && !this->type->is_vector())
1061 for (unsigned c = 0; c < this->type->vector_elements; c++) {
1062 switch (this->type->base_type) {
1063 case GLSL_TYPE_FLOAT:
1064 if (this->value.f[c] != 1.0)
1068 if (this->value.i[c] != 1)
1071 case GLSL_TYPE_UINT:
1072 if (this->value.u[c] != 1)
1075 case GLSL_TYPE_BOOL:
1076 if (this->value.b[c] != true)
1080 /* The only other base types are structures, arrays, and samplers.
1081 * Samplers cannot be constants, and the others should have been
1082 * filtered out above.
1084 assert(!"Should not get here.");
1093 ir_constant::is_negative_one() const
1095 if (!this->type->is_scalar() && !this->type->is_vector())
1098 if (this->type->is_boolean())
1101 for (unsigned c = 0; c < this->type->vector_elements; c++) {
1102 switch (this->type->base_type) {
1103 case GLSL_TYPE_FLOAT:
1104 if (this->value.f[c] != -1.0)
1108 if (this->value.i[c] != -1)
1111 case GLSL_TYPE_UINT:
1112 if (int(this->value.u[c]) != -1)
1116 /* The only other base types are structures, arrays, samplers, and
1117 * booleans. Samplers cannot be constants, and the others should
1118 * have been filtered out above.
1120 assert(!"Should not get here.");
1130 this->ir_type = ir_type_loop;
1131 this->cmp = ir_unop_neg;
1134 this->increment = NULL;
1135 this->counter = NULL;
1139 ir_dereference_variable::ir_dereference_variable(ir_variable *var)
1141 assert(var != NULL);
1143 this->ir_type = ir_type_dereference_variable;
1145 this->type = var->type;
1149 ir_dereference_array::ir_dereference_array(ir_rvalue *value,
1150 ir_rvalue *array_index)
1152 this->ir_type = ir_type_dereference_array;
1153 this->array_index = array_index;
1154 this->set_array(value);
1158 ir_dereference_array::ir_dereference_array(ir_variable *var,
1159 ir_rvalue *array_index)
1161 void *ctx = ralloc_parent(var);
1163 this->ir_type = ir_type_dereference_array;
1164 this->array_index = array_index;
1165 this->set_array(new(ctx) ir_dereference_variable(var));
1170 ir_dereference_array::set_array(ir_rvalue *value)
1172 assert(value != NULL);
1174 this->array = value;
1176 const glsl_type *const vt = this->array->type;
1178 if (vt->is_array()) {
1179 type = vt->element_type();
1180 } else if (vt->is_matrix()) {
1181 type = vt->column_type();
1182 } else if (vt->is_vector()) {
1183 type = vt->get_base_type();
1188 ir_dereference_record::ir_dereference_record(ir_rvalue *value,
1191 assert(value != NULL);
1193 this->ir_type = ir_type_dereference_record;
1194 this->record = value;
1195 this->field = ralloc_strdup(this, field);
1196 this->type = this->record->type->field_type(field);
1200 ir_dereference_record::ir_dereference_record(ir_variable *var,
1203 void *ctx = ralloc_parent(var);
1205 this->ir_type = ir_type_dereference_record;
1206 this->record = new(ctx) ir_dereference_variable(var);
1207 this->field = ralloc_strdup(this, field);
1208 this->type = this->record->type->field_type(field);
1212 ir_dereference::is_lvalue() const
1214 ir_variable *var = this->variable_referenced();
1216 /* Every l-value derference chain eventually ends in a variable.
1218 if ((var == NULL) || var->read_only)
1221 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1223 * "Samplers cannot be treated as l-values; hence cannot be used
1224 * as out or inout function parameters, nor can they be
1227 if (this->type->contains_sampler())
1234 const char *tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1236 const char *ir_texture::opcode_string()
1238 assert((unsigned int) op <=
1239 sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]));
1240 return tex_opcode_strs[op];
1244 ir_texture::get_opcode(const char *str)
1246 const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
1247 for (int op = 0; op < count; op++) {
1248 if (strcmp(str, tex_opcode_strs[op]) == 0)
1249 return (ir_texture_opcode) op;
1251 return (ir_texture_opcode) -1;
1256 ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)
1258 assert(sampler != NULL);
1259 assert(type != NULL);
1260 this->sampler = sampler;
1263 if (this->op == ir_txs) {
1264 assert(type->base_type == GLSL_TYPE_INT);
1266 assert(sampler->type->sampler_type == (int) type->base_type);
1267 if (sampler->type->sampler_shadow)
1268 assert(type->vector_elements == 4 || type->vector_elements == 1);
1270 assert(type->vector_elements == 4);
1276 ir_swizzle::init_mask(const unsigned *comp, unsigned count)
1278 assert((count >= 1) && (count <= 4));
1280 memset(&this->mask, 0, sizeof(this->mask));
1281 this->mask.num_components = count;
1283 unsigned dup_mask = 0;
1286 assert(comp[3] <= 3);
1287 dup_mask |= (1U << comp[3])
1288 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
1289 this->mask.w = comp[3];
1292 assert(comp[2] <= 3);
1293 dup_mask |= (1U << comp[2])
1294 & ((1U << comp[0]) | (1U << comp[1]));
1295 this->mask.z = comp[2];
1298 assert(comp[1] <= 3);
1299 dup_mask |= (1U << comp[1])
1300 & ((1U << comp[0]));
1301 this->mask.y = comp[1];
1304 assert(comp[0] <= 3);
1305 this->mask.x = comp[0];
1308 this->mask.has_duplicates = dup_mask != 0;
1310 /* Based on the number of elements in the swizzle and the base type
1311 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1312 * generate the type of the resulting value.
1314 type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
1317 ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
1318 unsigned w, unsigned count)
1321 const unsigned components[4] = { x, y, z, w };
1322 this->ir_type = ir_type_swizzle;
1323 this->init_mask(components, count);
1326 ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
1330 this->ir_type = ir_type_swizzle;
1331 this->init_mask(comp, count);
1334 ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
1336 this->ir_type = ir_type_swizzle;
1339 this->type = glsl_type::get_instance(val->type->base_type,
1340 mask.num_components, 1);
1349 ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
1351 void *ctx = ralloc_parent(val);
1353 /* For each possible swizzle character, this table encodes the value in
1354 * \c idx_map that represents the 0th element of the vector. For invalid
1355 * swizzle characters (e.g., 'k'), a special value is used that will allow
1356 * detection of errors.
1358 static const unsigned char base_idx[26] = {
1359 /* a b c d e f g h i j k l m */
1360 R, R, I, I, I, I, R, I, I, I, I, I, I,
1361 /* n o p q r s t u v w x y z */
1362 I, I, S, S, R, S, S, I, I, X, X, X, X
1365 /* Each valid swizzle character has an entry in the previous table. This
1366 * table encodes the base index encoded in the previous table plus the actual
1367 * index of the swizzle character. When processing swizzles, the first
1368 * character in the string is indexed in the previous table. Each character
1369 * in the string is indexed in this table, and the value found there has the
1370 * value form the first table subtracted. The result must be on the range
1373 * For example, the string "wzyx" will get X from the first table. Each of
1374 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1375 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1377 * The string "wzrg" will get X from the first table. Each of the characters
1378 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1379 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1380 * [0,3], the error is detected.
1382 static const unsigned char idx_map[26] = {
1383 /* a b c d e f g h i j k l m */
1384 R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
1385 /* n o p q r s t u v w x y z */
1386 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
1389 int swiz_idx[4] = { 0, 0, 0, 0 };
1393 /* Validate the first character in the swizzle string and look up the base
1394 * index value as described above.
1396 if ((str[0] < 'a') || (str[0] > 'z'))
1399 const unsigned base = base_idx[str[0] - 'a'];
1402 for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
1403 /* Validate the next character, and, as described above, convert it to a
1406 if ((str[i] < 'a') || (str[i] > 'z'))
1409 swiz_idx[i] = idx_map[str[i] - 'a'] - base;
1410 if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
1417 return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
1427 ir_swizzle::variable_referenced() const
1429 return this->val->variable_referenced();
1433 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
1434 ir_variable_mode mode)
1435 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1436 mode(mode), interpolation(INTERP_QUALIFIER_NONE)
1438 this->ir_type = ir_type_variable;
1440 this->name = ralloc_strdup(this, name);
1441 this->explicit_location = false;
1442 this->has_initializer = false;
1443 this->location = -1;
1444 this->warn_extension = NULL;
1445 this->constant_value = NULL;
1446 this->constant_initializer = NULL;
1447 this->origin_upper_left = false;
1448 this->pixel_center_integer = false;
1449 this->depth_layout = ir_depth_layout_none;
1452 if (type && type->base_type == GLSL_TYPE_SAMPLER)
1453 this->read_only = true;
1458 ir_variable::interpolation_string() const
1460 switch (this->interpolation) {
1461 case INTERP_QUALIFIER_NONE: return "no";
1462 case INTERP_QUALIFIER_SMOOTH: return "smooth";
1463 case INTERP_QUALIFIER_FLAT: return "flat";
1464 case INTERP_QUALIFIER_NOPERSPECTIVE: return "noperspective";
1467 assert(!"Should not get here.");
1472 glsl_interp_qualifier
1473 ir_variable::determine_interpolation_mode(bool flat_shade)
1475 if (this->interpolation != INTERP_QUALIFIER_NONE)
1476 return (glsl_interp_qualifier) this->interpolation;
1477 int location = this->location;
1479 location == FRAG_ATTRIB_COL0 || location == FRAG_ATTRIB_COL1;
1480 if (flat_shade && is_gl_Color)
1481 return INTERP_QUALIFIER_FLAT;
1483 return INTERP_QUALIFIER_SMOOTH;
1487 ir_function_signature::ir_function_signature(const glsl_type *return_type)
1488 : return_type(return_type), is_defined(false), _function(NULL)
1490 this->ir_type = ir_type_function_signature;
1491 this->is_builtin = false;
1492 this->origin = NULL;
1497 modes_match(unsigned a, unsigned b)
1502 /* Accept "in" vs. "const in" */
1503 if ((a == ir_var_const_in && b == ir_var_in) ||
1504 (b == ir_var_const_in && a == ir_var_in))
1512 ir_function_signature::qualifiers_match(exec_list *params)
1514 exec_list_iterator iter_a = parameters.iterator();
1515 exec_list_iterator iter_b = params->iterator();
1517 /* check that the qualifiers match. */
1518 while (iter_a.has_next()) {
1519 ir_variable *a = (ir_variable *)iter_a.get();
1520 ir_variable *b = (ir_variable *)iter_b.get();
1522 if (a->read_only != b->read_only ||
1523 !modes_match(a->mode, b->mode) ||
1524 a->interpolation != b->interpolation ||
1525 a->centroid != b->centroid) {
1527 /* parameter a's qualifiers don't match */
1539 ir_function_signature::replace_parameters(exec_list *new_params)
1541 /* Destroy all of the previous parameter information. If the previous
1542 * parameter information comes from the function prototype, it may either
1543 * specify incorrect parameter names or not have names at all.
1545 foreach_iter(exec_list_iterator, iter, parameters) {
1546 assert(((ir_instruction *) iter.get())->as_variable() != NULL);
1551 new_params->move_nodes_to(¶meters);
1555 ir_function::ir_function(const char *name)
1557 this->ir_type = ir_type_function;
1558 this->name = ralloc_strdup(this, name);
1563 ir_function::has_user_signature()
1565 foreach_list(n, &this->signatures) {
1566 ir_function_signature *const sig = (ir_function_signature *) n;
1567 if (!sig->is_builtin)
1575 ir_rvalue::error_value(void *mem_ctx)
1577 ir_rvalue *v = new(mem_ctx) ir_rvalue;
1579 v->type = glsl_type::error_type;
1585 visit_exec_list(exec_list *list, ir_visitor *visitor)
1587 foreach_iter(exec_list_iterator, iter, *list) {
1588 ((ir_instruction *)iter.get())->accept(visitor);
1594 steal_memory(ir_instruction *ir, void *new_ctx)
1596 ir_variable *var = ir->as_variable();
1597 ir_constant *constant = ir->as_constant();
1598 if (var != NULL && var->constant_value != NULL)
1599 steal_memory(var->constant_value, ir);
1601 if (var != NULL && var->constant_initializer != NULL)
1602 steal_memory(var->constant_initializer, ir);
1604 /* The components of aggregate constants are not visited by the normal
1605 * visitor, so steal their values by hand.
1607 if (constant != NULL) {
1608 if (constant->type->is_record()) {
1609 foreach_iter(exec_list_iterator, iter, constant->components) {
1610 ir_constant *field = (ir_constant *)iter.get();
1611 steal_memory(field, ir);
1613 } else if (constant->type->is_array()) {
1614 for (unsigned int i = 0; i < constant->type->length; i++) {
1615 steal_memory(constant->array_elements[i], ir);
1620 ralloc_steal(new_ctx, ir);
1625 reparent_ir(exec_list *list, void *mem_ctx)
1627 foreach_list(node, list) {
1628 visit_tree((ir_instruction *) node, steal_memory, mem_ctx);
1634 try_min_one(ir_rvalue *ir)
1636 ir_expression *expr = ir->as_expression();
1638 if (!expr || expr->operation != ir_binop_min)
1641 if (expr->operands[0]->is_one())
1642 return expr->operands[1];
1644 if (expr->operands[1]->is_one())
1645 return expr->operands[0];
1651 try_max_zero(ir_rvalue *ir)
1653 ir_expression *expr = ir->as_expression();
1655 if (!expr || expr->operation != ir_binop_max)
1658 if (expr->operands[0]->is_zero())
1659 return expr->operands[1];
1661 if (expr->operands[1]->is_zero())
1662 return expr->operands[0];
1668 ir_rvalue::as_rvalue_to_saturate()
1670 ir_expression *expr = this->as_expression();
1675 ir_rvalue *max_zero = try_max_zero(expr);
1677 return try_min_one(max_zero);
1679 ir_rvalue *min_one = try_min_one(expr);
1681 return try_max_zero(min_one);