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21 * DEALINGS IN THE SOFTWARE.
24 #include "main/core.h" /* for MAX2 */
26 #include "compiler/glsl_types.h"
28 ir_rvalue::ir_rvalue(enum ir_node_type t)
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.");
69 ir_assignment::set_lhs(ir_rvalue *lhs)
72 bool swizzled = false;
75 ir_swizzle *swiz = lhs->as_swizzle();
80 unsigned write_mask = 0;
81 ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
83 for (unsigned i = 0; i < swiz->mask.num_components; i++) {
87 case 0: c = swiz->mask.x; break;
88 case 1: c = swiz->mask.y; break;
89 case 2: c = swiz->mask.z; break;
90 case 3: c = swiz->mask.w; break;
91 default: assert(!"Should not get here.");
94 write_mask |= (((this->write_mask >> i) & 1) << c);
95 update_rhs_swizzle(rhs_swiz, i, c);
96 rhs_swiz.num_components = swiz->val->type->vector_elements;
99 this->write_mask = write_mask;
102 this->rhs = new(mem_ctx) ir_swizzle(this->rhs, rhs_swiz);
107 /* Now, RHS channels line up with the LHS writemask. Collapse it
108 * to just the channels that will be written.
110 ir_swizzle_mask rhs_swiz = { 0, 0, 0, 0, 0, 0 };
112 for (int i = 0; i < 4; i++) {
113 if (write_mask & (1 << i))
114 update_rhs_swizzle(rhs_swiz, i, rhs_chan++);
116 rhs_swiz.num_components = 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)
151 : ir_instruction(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)
171 : ir_instruction(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;
193 ir_expression::ir_expression(int op, const struct glsl_type *type,
194 ir_rvalue *op0, ir_rvalue *op1,
195 ir_rvalue *op2, ir_rvalue *op3)
196 : ir_rvalue(ir_type_expression)
199 this->operation = ir_expression_operation(op);
200 this->operands[0] = op0;
201 this->operands[1] = op1;
202 this->operands[2] = op2;
203 this->operands[3] = op3;
205 int num_operands = get_num_operands(this->operation);
206 for (int i = num_operands; i < 4; i++) {
207 assert(this->operands[i] == NULL);
212 ir_expression::ir_expression(int op, ir_rvalue *op0)
213 : ir_rvalue(ir_type_expression)
215 this->operation = ir_expression_operation(op);
216 this->operands[0] = op0;
217 this->operands[1] = NULL;
218 this->operands[2] = NULL;
219 this->operands[3] = NULL;
221 assert(op <= ir_last_unop);
223 switch (this->operation) {
224 case ir_unop_bit_not:
225 case ir_unop_logic_not:
240 case ir_unop_round_even:
244 case ir_unop_dFdx_coarse:
245 case ir_unop_dFdx_fine:
247 case ir_unop_dFdy_coarse:
248 case ir_unop_dFdy_fine:
249 case ir_unop_bitfield_reverse:
250 case ir_unop_interpolate_at_centroid:
251 case ir_unop_saturate:
252 this->type = op0->type;
259 case ir_unop_bitcast_f2i:
260 case ir_unop_bit_count:
261 case ir_unop_find_msb:
262 case ir_unop_find_lsb:
263 case ir_unop_subroutine_to_int:
264 this->type = glsl_type::get_instance(GLSL_TYPE_INT,
265 op0->type->vector_elements, 1);
272 case ir_unop_bitcast_i2f:
273 case ir_unop_bitcast_u2f:
274 this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
275 op0->type->vector_elements, 1);
281 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
282 op0->type->vector_elements, 1);
288 this->type = glsl_type::get_instance(GLSL_TYPE_DOUBLE,
289 op0->type->vector_elements, 1);
295 case ir_unop_bitcast_f2u:
296 this->type = glsl_type::get_instance(GLSL_TYPE_UINT,
297 op0->type->vector_elements, 1);
301 this->type = glsl_type::float_type;
304 case ir_unop_unpack_double_2x32:
305 this->type = glsl_type::uvec2_type;
308 case ir_unop_pack_snorm_2x16:
309 case ir_unop_pack_snorm_4x8:
310 case ir_unop_pack_unorm_2x16:
311 case ir_unop_pack_unorm_4x8:
312 case ir_unop_pack_half_2x16:
313 this->type = glsl_type::uint_type;
316 case ir_unop_pack_double_2x32:
317 this->type = glsl_type::double_type;
320 case ir_unop_unpack_snorm_2x16:
321 case ir_unop_unpack_unorm_2x16:
322 case ir_unop_unpack_half_2x16:
323 this->type = glsl_type::vec2_type;
326 case ir_unop_unpack_snorm_4x8:
327 case ir_unop_unpack_unorm_4x8:
328 this->type = glsl_type::vec4_type;
331 case ir_unop_frexp_sig:
332 this->type = op0->type;
334 case ir_unop_frexp_exp:
335 this->type = glsl_type::get_instance(GLSL_TYPE_INT,
336 op0->type->vector_elements, 1);
339 case ir_unop_get_buffer_size:
340 case ir_unop_ssbo_unsized_array_length:
341 this->type = glsl_type::int_type;
344 case ir_unop_vote_any:
345 case ir_unop_vote_all:
346 case ir_unop_vote_eq:
347 this->type = glsl_type::bool_type;
351 assert(!"not reached: missing automatic type setup for ir_expression");
352 this->type = op0->type;
357 ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1)
358 : ir_rvalue(ir_type_expression)
360 this->operation = ir_expression_operation(op);
361 this->operands[0] = op0;
362 this->operands[1] = op1;
363 this->operands[2] = NULL;
364 this->operands[3] = NULL;
366 assert(op > ir_last_unop);
368 switch (this->operation) {
369 case ir_binop_all_equal:
370 case ir_binop_any_nequal:
371 this->type = glsl_type::bool_type;
382 if (op0->type->is_scalar()) {
383 this->type = op1->type;
384 } else if (op1->type->is_scalar()) {
385 this->type = op0->type;
387 if (this->operation == ir_binop_mul) {
388 this->type = glsl_type::get_mul_type(op0->type, op1->type);
390 assert(op0->type == op1->type);
391 this->type = op0->type;
396 case ir_binop_logic_and:
397 case ir_binop_logic_xor:
398 case ir_binop_logic_or:
399 case ir_binop_bit_and:
400 case ir_binop_bit_xor:
401 case ir_binop_bit_or:
402 assert(!op0->type->is_matrix());
403 assert(!op1->type->is_matrix());
404 if (op0->type->is_scalar()) {
405 this->type = op1->type;
406 } else if (op1->type->is_scalar()) {
407 this->type = op0->type;
409 assert(op0->type->vector_elements == op1->type->vector_elements);
410 this->type = op0->type;
415 case ir_binop_nequal:
416 case ir_binop_lequal:
417 case ir_binop_gequal:
419 case ir_binop_greater:
420 assert(op0->type == op1->type);
421 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL,
422 op0->type->vector_elements, 1);
426 this->type = op0->type->get_base_type();
429 case ir_binop_imul_high:
431 case ir_binop_borrow:
432 case ir_binop_lshift:
433 case ir_binop_rshift:
435 case ir_binop_interpolate_at_offset:
436 case ir_binop_interpolate_at_sample:
437 this->type = op0->type;
440 case ir_binop_vector_extract:
441 this->type = op0->type->get_scalar_type();
445 assert(!"not reached: missing automatic type setup for ir_expression");
446 this->type = glsl_type::float_type;
450 ir_expression::ir_expression(int op, ir_rvalue *op0, ir_rvalue *op1,
452 : ir_rvalue(ir_type_expression)
454 this->operation = ir_expression_operation(op);
455 this->operands[0] = op0;
456 this->operands[1] = op1;
457 this->operands[2] = op2;
458 this->operands[3] = NULL;
460 assert(op > ir_last_binop && op <= ir_last_triop);
462 switch (this->operation) {
465 case ir_triop_bitfield_extract:
466 case ir_triop_vector_insert:
467 this->type = op0->type;
471 this->type = op1->type;
475 assert(!"not reached: missing automatic type setup for ir_expression");
476 this->type = glsl_type::float_type;
481 ir_expression::get_num_operands(ir_expression_operation op)
483 assert(op <= ir_last_opcode);
485 if (op <= ir_last_unop)
488 if (op <= ir_last_binop)
491 if (op <= ir_last_triop)
494 if (op <= ir_last_quadop)
501 #include "ir_expression_operation_strings.h"
504 depth_layout_string(ir_depth_layout layout)
507 case ir_depth_layout_none: return "";
508 case ir_depth_layout_any: return "depth_any";
509 case ir_depth_layout_greater: return "depth_greater";
510 case ir_depth_layout_less: return "depth_less";
511 case ir_depth_layout_unchanged: return "depth_unchanged";
519 ir_expression_operation
520 ir_expression::get_operator(const char *str)
522 for (int op = 0; op <= int(ir_last_opcode); op++) {
523 if (strcmp(str, ir_expression_operation_strings[op]) == 0)
524 return (ir_expression_operation) op;
526 return (ir_expression_operation) -1;
530 ir_expression::variable_referenced() const
533 case ir_binop_vector_extract:
534 case ir_triop_vector_insert:
535 /* We get these for things like a[0] where a is a vector type. In these
536 * cases we want variable_referenced() to return the actual vector
537 * variable this is wrapping.
539 return operands[0]->variable_referenced();
541 return ir_rvalue::variable_referenced();
545 ir_constant::ir_constant()
546 : ir_rvalue(ir_type_constant)
548 this->array_elements = NULL;
551 ir_constant::ir_constant(const struct glsl_type *type,
552 const ir_constant_data *data)
553 : ir_rvalue(ir_type_constant)
555 this->array_elements = NULL;
557 assert((type->base_type >= GLSL_TYPE_UINT)
558 && (type->base_type <= GLSL_TYPE_BOOL));
561 memcpy(& this->value, data, sizeof(this->value));
564 ir_constant::ir_constant(float f, unsigned vector_elements)
565 : ir_rvalue(ir_type_constant)
567 assert(vector_elements <= 4);
568 this->type = glsl_type::get_instance(GLSL_TYPE_FLOAT, vector_elements, 1);
569 for (unsigned i = 0; i < vector_elements; i++) {
570 this->value.f[i] = f;
572 for (unsigned i = vector_elements; i < 16; i++) {
573 this->value.f[i] = 0;
577 ir_constant::ir_constant(double d, unsigned vector_elements)
578 : ir_rvalue(ir_type_constant)
580 assert(vector_elements <= 4);
581 this->type = glsl_type::get_instance(GLSL_TYPE_DOUBLE, vector_elements, 1);
582 for (unsigned i = 0; i < vector_elements; i++) {
583 this->value.d[i] = d;
585 for (unsigned i = vector_elements; i < 16; i++) {
586 this->value.d[i] = 0.0;
590 ir_constant::ir_constant(unsigned int u, unsigned vector_elements)
591 : ir_rvalue(ir_type_constant)
593 assert(vector_elements <= 4);
594 this->type = glsl_type::get_instance(GLSL_TYPE_UINT, vector_elements, 1);
595 for (unsigned i = 0; i < vector_elements; i++) {
596 this->value.u[i] = u;
598 for (unsigned i = vector_elements; i < 16; i++) {
599 this->value.u[i] = 0;
603 ir_constant::ir_constant(int integer, unsigned vector_elements)
604 : ir_rvalue(ir_type_constant)
606 assert(vector_elements <= 4);
607 this->type = glsl_type::get_instance(GLSL_TYPE_INT, vector_elements, 1);
608 for (unsigned i = 0; i < vector_elements; i++) {
609 this->value.i[i] = integer;
611 for (unsigned i = vector_elements; i < 16; i++) {
612 this->value.i[i] = 0;
616 ir_constant::ir_constant(bool b, unsigned vector_elements)
617 : ir_rvalue(ir_type_constant)
619 assert(vector_elements <= 4);
620 this->type = glsl_type::get_instance(GLSL_TYPE_BOOL, vector_elements, 1);
621 for (unsigned i = 0; i < vector_elements; i++) {
622 this->value.b[i] = b;
624 for (unsigned i = vector_elements; i < 16; i++) {
625 this->value.b[i] = false;
629 ir_constant::ir_constant(const ir_constant *c, unsigned i)
630 : ir_rvalue(ir_type_constant)
632 this->array_elements = NULL;
633 this->type = c->type->get_base_type();
635 switch (this->type->base_type) {
636 case GLSL_TYPE_UINT: this->value.u[0] = c->value.u[i]; break;
637 case GLSL_TYPE_INT: this->value.i[0] = c->value.i[i]; break;
638 case GLSL_TYPE_FLOAT: this->value.f[0] = c->value.f[i]; break;
639 case GLSL_TYPE_BOOL: this->value.b[0] = c->value.b[i]; break;
640 case GLSL_TYPE_DOUBLE: this->value.d[0] = c->value.d[i]; break;
641 default: assert(!"Should not get here."); break;
645 ir_constant::ir_constant(const struct glsl_type *type, exec_list *value_list)
646 : ir_rvalue(ir_type_constant)
648 this->array_elements = NULL;
651 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
652 || type->is_record() || type->is_array());
654 if (type->is_array()) {
655 this->array_elements = ralloc_array(this, ir_constant *, type->length);
657 foreach_in_list(ir_constant, value, value_list) {
658 assert(value->as_constant() != NULL);
660 this->array_elements[i++] = value;
665 /* If the constant is a record, the types of each of the entries in
666 * value_list must be a 1-for-1 match with the structure components. Each
667 * entry must also be a constant. Just move the nodes from the value_list
668 * to the list in the ir_constant.
670 /* FINISHME: Should there be some type checking and / or assertions here? */
671 /* FINISHME: Should the new constant take ownership of the nodes from
672 * FINISHME: value_list, or should it make copies?
674 if (type->is_record()) {
675 value_list->move_nodes_to(& this->components);
679 for (unsigned i = 0; i < 16; i++) {
680 this->value.u[i] = 0;
683 ir_constant *value = (ir_constant *) (value_list->get_head_raw());
685 /* Constructors with exactly one scalar argument are special for vectors
686 * and matrices. For vectors, the scalar value is replicated to fill all
687 * the components. For matrices, the scalar fills the components of the
688 * diagonal while the rest is filled with 0.
690 if (value->type->is_scalar() && value->next->is_tail_sentinel()) {
691 if (type->is_matrix()) {
692 /* Matrix - fill diagonal (rest is already set to 0) */
693 assert(type->base_type == GLSL_TYPE_FLOAT ||
694 type->base_type == GLSL_TYPE_DOUBLE);
695 for (unsigned i = 0; i < type->matrix_columns; i++) {
696 if (type->base_type == GLSL_TYPE_FLOAT)
697 this->value.f[i * type->vector_elements + i] =
700 this->value.d[i * type->vector_elements + i] =
704 /* Vector or scalar - fill all components */
705 switch (type->base_type) {
708 for (unsigned i = 0; i < type->components(); i++)
709 this->value.u[i] = value->value.u[0];
711 case GLSL_TYPE_FLOAT:
712 for (unsigned i = 0; i < type->components(); i++)
713 this->value.f[i] = value->value.f[0];
715 case GLSL_TYPE_DOUBLE:
716 for (unsigned i = 0; i < type->components(); i++)
717 this->value.d[i] = value->value.d[0];
720 for (unsigned i = 0; i < type->components(); i++)
721 this->value.b[i] = value->value.b[0];
724 assert(!"Should not get here.");
731 if (type->is_matrix() && value->type->is_matrix()) {
732 assert(value->next->is_tail_sentinel());
734 /* From section 5.4.2 of the GLSL 1.20 spec:
735 * "If a matrix is constructed from a matrix, then each component
736 * (column i, row j) in the result that has a corresponding component
737 * (column i, row j) in the argument will be initialized from there."
739 unsigned cols = MIN2(type->matrix_columns, value->type->matrix_columns);
740 unsigned rows = MIN2(type->vector_elements, value->type->vector_elements);
741 for (unsigned i = 0; i < cols; i++) {
742 for (unsigned j = 0; j < rows; j++) {
743 const unsigned src = i * value->type->vector_elements + j;
744 const unsigned dst = i * type->vector_elements + j;
745 this->value.f[dst] = value->value.f[src];
749 /* "All other components will be initialized to the identity matrix." */
750 for (unsigned i = cols; i < type->matrix_columns; i++)
751 this->value.f[i * type->vector_elements + i] = 1.0;
756 /* Use each component from each entry in the value_list to initialize one
757 * component of the constant being constructed.
761 assert(value->as_constant() != NULL);
762 assert(!value->is_tail_sentinel());
764 for (unsigned j = 0; j < value->type->components(); j++) {
765 switch (type->base_type) {
767 this->value.u[i] = value->get_uint_component(j);
770 this->value.i[i] = value->get_int_component(j);
772 case GLSL_TYPE_FLOAT:
773 this->value.f[i] = value->get_float_component(j);
776 this->value.b[i] = value->get_bool_component(j);
778 case GLSL_TYPE_DOUBLE:
779 this->value.d[i] = value->get_double_component(j);
782 /* FINISHME: What to do? Exceptions are not the answer.
788 if (i >= type->components())
792 if (i >= type->components())
793 break; /* avoid downcasting a list sentinel */
794 value = (ir_constant *) value->next;
799 ir_constant::zero(void *mem_ctx, const glsl_type *type)
801 assert(type->is_scalar() || type->is_vector() || type->is_matrix()
802 || type->is_record() || type->is_array());
804 ir_constant *c = new(mem_ctx) ir_constant;
806 memset(&c->value, 0, sizeof(c->value));
808 if (type->is_array()) {
809 c->array_elements = ralloc_array(c, ir_constant *, type->length);
811 for (unsigned i = 0; i < type->length; i++)
812 c->array_elements[i] = ir_constant::zero(c, type->fields.array);
815 if (type->is_record()) {
816 for (unsigned i = 0; i < type->length; i++) {
817 ir_constant *comp = ir_constant::zero(mem_ctx, type->fields.structure[i].type);
818 c->components.push_tail(comp);
826 ir_constant::get_bool_component(unsigned i) const
828 switch (this->type->base_type) {
829 case GLSL_TYPE_UINT: return this->value.u[i] != 0;
830 case GLSL_TYPE_INT: return this->value.i[i] != 0;
831 case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
832 case GLSL_TYPE_BOOL: return this->value.b[i];
833 case GLSL_TYPE_DOUBLE: return this->value.d[i] != 0.0;
834 default: assert(!"Should not get here."); break;
837 /* Must return something to make the compiler happy. This is clearly an
844 ir_constant::get_float_component(unsigned i) const
846 switch (this->type->base_type) {
847 case GLSL_TYPE_UINT: return (float) this->value.u[i];
848 case GLSL_TYPE_INT: return (float) this->value.i[i];
849 case GLSL_TYPE_FLOAT: return this->value.f[i];
850 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0f : 0.0f;
851 case GLSL_TYPE_DOUBLE: return (float) this->value.d[i];
852 default: assert(!"Should not get here."); break;
855 /* Must return something to make the compiler happy. This is clearly an
862 ir_constant::get_double_component(unsigned i) const
864 switch (this->type->base_type) {
865 case GLSL_TYPE_UINT: return (double) this->value.u[i];
866 case GLSL_TYPE_INT: return (double) this->value.i[i];
867 case GLSL_TYPE_FLOAT: return (double) this->value.f[i];
868 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
869 case GLSL_TYPE_DOUBLE: return this->value.d[i];
870 default: assert(!"Should not get here."); break;
873 /* Must return something to make the compiler happy. This is clearly an
880 ir_constant::get_int_component(unsigned i) const
882 switch (this->type->base_type) {
883 case GLSL_TYPE_UINT: return this->value.u[i];
884 case GLSL_TYPE_INT: return this->value.i[i];
885 case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
886 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
887 case GLSL_TYPE_DOUBLE: return (int) this->value.d[i];
888 default: assert(!"Should not get here."); break;
891 /* Must return something to make the compiler happy. This is clearly an
898 ir_constant::get_uint_component(unsigned i) const
900 switch (this->type->base_type) {
901 case GLSL_TYPE_UINT: return this->value.u[i];
902 case GLSL_TYPE_INT: return this->value.i[i];
903 case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
904 case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
905 case GLSL_TYPE_DOUBLE: return (unsigned) this->value.d[i];
906 default: assert(!"Should not get here."); break;
909 /* Must return something to make the compiler happy. This is clearly an
916 ir_constant::get_array_element(unsigned i) const
918 assert(this->type->is_array());
920 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
922 * "Behavior is undefined if a shader subscripts an array with an index
923 * less than 0 or greater than or equal to the size the array was
926 * Most out-of-bounds accesses are removed before things could get this far.
927 * There are cases where non-constant array index values can get constant
932 else if (i >= this->type->length)
933 i = this->type->length - 1;
935 return array_elements[i];
939 ir_constant::get_record_field(const char *name)
941 int idx = this->type->field_index(name);
946 if (this->components.is_empty())
949 exec_node *node = this->components.get_head_raw();
950 for (int i = 0; i < idx; i++) {
953 /* If the end of the list is encountered before the element matching the
954 * requested field is found, return NULL.
956 if (node->is_tail_sentinel())
960 return (ir_constant *) node;
964 ir_constant::copy_offset(ir_constant *src, int offset)
966 switch (this->type->base_type) {
969 case GLSL_TYPE_FLOAT:
970 case GLSL_TYPE_DOUBLE:
971 case GLSL_TYPE_BOOL: {
972 unsigned int size = src->type->components();
973 assert (size <= this->type->components() - offset);
974 for (unsigned int i=0; i<size; i++) {
975 switch (this->type->base_type) {
977 value.u[i+offset] = src->get_uint_component(i);
980 value.i[i+offset] = src->get_int_component(i);
982 case GLSL_TYPE_FLOAT:
983 value.f[i+offset] = src->get_float_component(i);
986 value.b[i+offset] = src->get_bool_component(i);
988 case GLSL_TYPE_DOUBLE:
989 value.d[i+offset] = src->get_double_component(i);
991 default: // Shut up the compiler
998 case GLSL_TYPE_STRUCT: {
999 assert (src->type == this->type);
1000 this->components.make_empty();
1001 foreach_in_list(ir_constant, orig, &src->components) {
1002 this->components.push_tail(orig->clone(this, NULL));
1007 case GLSL_TYPE_ARRAY: {
1008 assert (src->type == this->type);
1009 for (unsigned i = 0; i < this->type->length; i++) {
1010 this->array_elements[i] = src->array_elements[i]->clone(this, NULL);
1016 assert(!"Should not get here.");
1022 ir_constant::copy_masked_offset(ir_constant *src, int offset, unsigned int mask)
1024 assert (!type->is_array() && !type->is_record());
1026 if (!type->is_vector() && !type->is_matrix()) {
1032 for (int i=0; i<4; i++) {
1033 if (mask & (1 << i)) {
1034 switch (this->type->base_type) {
1035 case GLSL_TYPE_UINT:
1036 value.u[i+offset] = src->get_uint_component(id++);
1039 value.i[i+offset] = src->get_int_component(id++);
1041 case GLSL_TYPE_FLOAT:
1042 value.f[i+offset] = src->get_float_component(id++);
1044 case GLSL_TYPE_BOOL:
1045 value.b[i+offset] = src->get_bool_component(id++);
1047 case GLSL_TYPE_DOUBLE:
1048 value.d[i+offset] = src->get_double_component(id++);
1051 assert(!"Should not get here.");
1059 ir_constant::has_value(const ir_constant *c) const
1061 if (this->type != c->type)
1064 if (this->type->is_array()) {
1065 for (unsigned i = 0; i < this->type->length; i++) {
1066 if (!this->array_elements[i]->has_value(c->array_elements[i]))
1072 if (this->type->base_type == GLSL_TYPE_STRUCT) {
1073 const exec_node *a_node = this->components.get_head_raw();
1074 const exec_node *b_node = c->components.get_head_raw();
1076 while (!a_node->is_tail_sentinel()) {
1077 assert(!b_node->is_tail_sentinel());
1079 const ir_constant *const a_field = (ir_constant *) a_node;
1080 const ir_constant *const b_field = (ir_constant *) b_node;
1082 if (!a_field->has_value(b_field))
1085 a_node = a_node->next;
1086 b_node = b_node->next;
1092 for (unsigned i = 0; i < this->type->components(); i++) {
1093 switch (this->type->base_type) {
1094 case GLSL_TYPE_UINT:
1095 if (this->value.u[i] != c->value.u[i])
1099 if (this->value.i[i] != c->value.i[i])
1102 case GLSL_TYPE_FLOAT:
1103 if (this->value.f[i] != c->value.f[i])
1106 case GLSL_TYPE_BOOL:
1107 if (this->value.b[i] != c->value.b[i])
1110 case GLSL_TYPE_DOUBLE:
1111 if (this->value.d[i] != c->value.d[i])
1115 assert(!"Should not get here.");
1124 ir_constant::is_value(float f, int i) const
1126 if (!this->type->is_scalar() && !this->type->is_vector())
1129 /* Only accept boolean values for 0/1. */
1130 if (int(bool(i)) != i && this->type->is_boolean())
1133 for (unsigned c = 0; c < this->type->vector_elements; c++) {
1134 switch (this->type->base_type) {
1135 case GLSL_TYPE_FLOAT:
1136 if (this->value.f[c] != f)
1140 if (this->value.i[c] != i)
1143 case GLSL_TYPE_UINT:
1144 if (this->value.u[c] != unsigned(i))
1147 case GLSL_TYPE_BOOL:
1148 if (this->value.b[c] != bool(i))
1151 case GLSL_TYPE_DOUBLE:
1152 if (this->value.d[c] != double(f))
1156 /* The only other base types are structures, arrays, and samplers.
1157 * Samplers cannot be constants, and the others should have been
1158 * filtered out above.
1160 assert(!"Should not get here.");
1169 ir_constant::is_zero() const
1171 return is_value(0.0, 0);
1175 ir_constant::is_one() const
1177 return is_value(1.0, 1);
1181 ir_constant::is_negative_one() const
1183 return is_value(-1.0, -1);
1187 ir_constant::is_uint16_constant() const
1189 if (!type->is_integer())
1192 return value.u[0] < (1 << 16);
1196 : ir_instruction(ir_type_loop)
1201 ir_dereference_variable::ir_dereference_variable(ir_variable *var)
1202 : ir_dereference(ir_type_dereference_variable)
1204 assert(var != NULL);
1207 this->type = var->type;
1211 ir_dereference_array::ir_dereference_array(ir_rvalue *value,
1212 ir_rvalue *array_index)
1213 : ir_dereference(ir_type_dereference_array)
1215 this->array_index = array_index;
1216 this->set_array(value);
1220 ir_dereference_array::ir_dereference_array(ir_variable *var,
1221 ir_rvalue *array_index)
1222 : ir_dereference(ir_type_dereference_array)
1224 void *ctx = ralloc_parent(var);
1226 this->array_index = array_index;
1227 this->set_array(new(ctx) ir_dereference_variable(var));
1232 ir_dereference_array::set_array(ir_rvalue *value)
1234 assert(value != NULL);
1236 this->array = value;
1238 const glsl_type *const vt = this->array->type;
1240 if (vt->is_array()) {
1241 type = vt->fields.array;
1242 } else if (vt->is_matrix()) {
1243 type = vt->column_type();
1244 } else if (vt->is_vector()) {
1245 type = vt->get_base_type();
1250 ir_dereference_record::ir_dereference_record(ir_rvalue *value,
1252 : ir_dereference(ir_type_dereference_record)
1254 assert(value != NULL);
1256 this->record = value;
1257 this->field = ralloc_strdup(this, field);
1258 this->type = this->record->type->field_type(field);
1262 ir_dereference_record::ir_dereference_record(ir_variable *var,
1264 : ir_dereference(ir_type_dereference_record)
1266 void *ctx = ralloc_parent(var);
1268 this->record = new(ctx) ir_dereference_variable(var);
1269 this->field = ralloc_strdup(this, field);
1270 this->type = this->record->type->field_type(field);
1274 ir_dereference::is_lvalue() const
1276 ir_variable *var = this->variable_referenced();
1278 /* Every l-value derference chain eventually ends in a variable.
1280 if ((var == NULL) || var->data.read_only)
1283 /* From section 4.1.7 of the GLSL 4.40 spec:
1285 * "Opaque variables cannot be treated as l-values; hence cannot
1286 * be used as out or inout function parameters, nor can they be
1289 if (this->type->contains_opaque())
1296 static const char * const tex_opcode_strs[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod", "tg4", "query_levels", "texture_samples", "samples_identical" };
1298 const char *ir_texture::opcode_string()
1300 assert((unsigned int) op < ARRAY_SIZE(tex_opcode_strs));
1301 return tex_opcode_strs[op];
1305 ir_texture::get_opcode(const char *str)
1307 const int count = sizeof(tex_opcode_strs) / sizeof(tex_opcode_strs[0]);
1308 for (int op = 0; op < count; op++) {
1309 if (strcmp(str, tex_opcode_strs[op]) == 0)
1310 return (ir_texture_opcode) op;
1312 return (ir_texture_opcode) -1;
1317 ir_texture::set_sampler(ir_dereference *sampler, const glsl_type *type)
1319 assert(sampler != NULL);
1320 assert(type != NULL);
1321 this->sampler = sampler;
1324 if (this->op == ir_txs || this->op == ir_query_levels ||
1325 this->op == ir_texture_samples) {
1326 assert(type->base_type == GLSL_TYPE_INT);
1327 } else if (this->op == ir_lod) {
1328 assert(type->vector_elements == 2);
1329 assert(type->base_type == GLSL_TYPE_FLOAT);
1330 } else if (this->op == ir_samples_identical) {
1331 assert(type == glsl_type::bool_type);
1332 assert(sampler->type->base_type == GLSL_TYPE_SAMPLER);
1333 assert(sampler->type->sampler_dimensionality == GLSL_SAMPLER_DIM_MS);
1335 assert(sampler->type->sampled_type == (int) type->base_type);
1336 if (sampler->type->sampler_shadow)
1337 assert(type->vector_elements == 4 || type->vector_elements == 1);
1339 assert(type->vector_elements == 4);
1345 ir_swizzle::init_mask(const unsigned *comp, unsigned count)
1347 assert((count >= 1) && (count <= 4));
1349 memset(&this->mask, 0, sizeof(this->mask));
1350 this->mask.num_components = count;
1352 unsigned dup_mask = 0;
1355 assert(comp[3] <= 3);
1356 dup_mask |= (1U << comp[3])
1357 & ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
1358 this->mask.w = comp[3];
1361 assert(comp[2] <= 3);
1362 dup_mask |= (1U << comp[2])
1363 & ((1U << comp[0]) | (1U << comp[1]));
1364 this->mask.z = comp[2];
1367 assert(comp[1] <= 3);
1368 dup_mask |= (1U << comp[1])
1369 & ((1U << comp[0]));
1370 this->mask.y = comp[1];
1373 assert(comp[0] <= 3);
1374 this->mask.x = comp[0];
1377 this->mask.has_duplicates = dup_mask != 0;
1379 /* Based on the number of elements in the swizzle and the base type
1380 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1381 * generate the type of the resulting value.
1383 type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
1386 ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
1387 unsigned w, unsigned count)
1388 : ir_rvalue(ir_type_swizzle), val(val)
1390 const unsigned components[4] = { x, y, z, w };
1391 this->init_mask(components, count);
1394 ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
1396 : ir_rvalue(ir_type_swizzle), val(val)
1398 this->init_mask(comp, count);
1401 ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
1402 : ir_rvalue(ir_type_swizzle)
1406 this->type = glsl_type::get_instance(val->type->base_type,
1407 mask.num_components, 1);
1416 ir_swizzle::create(ir_rvalue *val, const char *str, unsigned vector_length)
1418 void *ctx = ralloc_parent(val);
1420 /* For each possible swizzle character, this table encodes the value in
1421 * \c idx_map that represents the 0th element of the vector. For invalid
1422 * swizzle characters (e.g., 'k'), a special value is used that will allow
1423 * detection of errors.
1425 static const unsigned char base_idx[26] = {
1426 /* a b c d e f g h i j k l m */
1427 R, R, I, I, I, I, R, I, I, I, I, I, I,
1428 /* n o p q r s t u v w x y z */
1429 I, I, S, S, R, S, S, I, I, X, X, X, X
1432 /* Each valid swizzle character has an entry in the previous table. This
1433 * table encodes the base index encoded in the previous table plus the actual
1434 * index of the swizzle character. When processing swizzles, the first
1435 * character in the string is indexed in the previous table. Each character
1436 * in the string is indexed in this table, and the value found there has the
1437 * value form the first table subtracted. The result must be on the range
1440 * For example, the string "wzyx" will get X from the first table. Each of
1441 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1442 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1444 * The string "wzrg" will get X from the first table. Each of the characters
1445 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1446 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1447 * [0,3], the error is detected.
1449 static const unsigned char idx_map[26] = {
1450 /* a b c d e f g h i j k l m */
1451 R+3, R+2, 0, 0, 0, 0, R+1, 0, 0, 0, 0, 0, 0,
1452 /* n o p q r s t u v w x y z */
1453 0, 0, S+2, S+3, R+0, S+0, S+1, 0, 0, X+3, X+0, X+1, X+2
1456 int swiz_idx[4] = { 0, 0, 0, 0 };
1460 /* Validate the first character in the swizzle string and look up the base
1461 * index value as described above.
1463 if ((str[0] < 'a') || (str[0] > 'z'))
1466 const unsigned base = base_idx[str[0] - 'a'];
1469 for (i = 0; (i < 4) && (str[i] != '\0'); i++) {
1470 /* Validate the next character, and, as described above, convert it to a
1473 if ((str[i] < 'a') || (str[i] > 'z'))
1476 swiz_idx[i] = idx_map[str[i] - 'a'] - base;
1477 if ((swiz_idx[i] < 0) || (swiz_idx[i] >= (int) vector_length))
1484 return new(ctx) ir_swizzle(val, swiz_idx[0], swiz_idx[1], swiz_idx[2],
1494 ir_swizzle::variable_referenced() const
1496 return this->val->variable_referenced();
1500 bool ir_variable::temporaries_allocate_names = false;
1502 const char ir_variable::tmp_name[] = "compiler_temp";
1504 ir_variable::ir_variable(const struct glsl_type *type, const char *name,
1505 ir_variable_mode mode)
1506 : ir_instruction(ir_type_variable)
1510 if (mode == ir_var_temporary && !ir_variable::temporaries_allocate_names)
1513 /* The ir_variable clone method may call this constructor with name set to
1517 || mode == ir_var_temporary
1518 || mode == ir_var_function_in
1519 || mode == ir_var_function_out
1520 || mode == ir_var_function_inout);
1521 assert(name != ir_variable::tmp_name
1522 || mode == ir_var_temporary);
1523 if (mode == ir_var_temporary
1524 && (name == NULL || name == ir_variable::tmp_name)) {
1525 this->name = ir_variable::tmp_name;
1526 } else if (name == NULL ||
1527 strlen(name) < ARRAY_SIZE(this->name_storage)) {
1528 strcpy(this->name_storage, name ? name : "");
1529 this->name = this->name_storage;
1531 this->name = ralloc_strdup(this, name);
1534 this->u.max_ifc_array_access = NULL;
1536 this->data.explicit_location = false;
1537 this->data.has_initializer = false;
1538 this->data.location = -1;
1539 this->data.location_frac = 0;
1540 this->data.binding = 0;
1541 this->data.warn_extension_index = 0;
1542 this->constant_value = NULL;
1543 this->constant_initializer = NULL;
1544 this->data.origin_upper_left = false;
1545 this->data.pixel_center_integer = false;
1546 this->data.depth_layout = ir_depth_layout_none;
1547 this->data.used = false;
1548 this->data.always_active_io = false;
1549 this->data.read_only = false;
1550 this->data.centroid = false;
1551 this->data.sample = false;
1552 this->data.patch = false;
1553 this->data.invariant = false;
1554 this->data.how_declared = ir_var_declared_normally;
1555 this->data.mode = mode;
1556 this->data.interpolation = INTERP_MODE_NONE;
1557 this->data.max_array_access = -1;
1558 this->data.offset = 0;
1559 this->data.precision = GLSL_PRECISION_NONE;
1560 this->data.image_read_only = false;
1561 this->data.image_write_only = false;
1562 this->data.image_coherent = false;
1563 this->data.image_volatile = false;
1564 this->data.image_restrict = false;
1565 this->data.from_ssbo_unsized_array = false;
1566 this->data.fb_fetch_output = false;
1569 if (type->base_type == GLSL_TYPE_SAMPLER)
1570 this->data.read_only = true;
1572 if (type->is_interface())
1573 this->init_interface_type(type);
1574 else if (type->without_array()->is_interface())
1575 this->init_interface_type(type->without_array());
1581 interpolation_string(unsigned interpolation)
1583 switch (interpolation) {
1584 case INTERP_MODE_NONE: return "no";
1585 case INTERP_MODE_SMOOTH: return "smooth";
1586 case INTERP_MODE_FLAT: return "flat";
1587 case INTERP_MODE_NOPERSPECTIVE: return "noperspective";
1590 assert(!"Should not get here.");
1594 const char *const ir_variable::warn_extension_table[] = {
1596 "GL_ARB_shader_stencil_export",
1597 "GL_AMD_shader_stencil_export",
1601 ir_variable::enable_extension_warning(const char *extension)
1603 for (unsigned i = 0; i < ARRAY_SIZE(warn_extension_table); i++) {
1604 if (strcmp(warn_extension_table[i], extension) == 0) {
1605 this->data.warn_extension_index = i;
1610 assert(!"Should not get here.");
1611 this->data.warn_extension_index = 0;
1615 ir_variable::get_extension_warning() const
1617 return this->data.warn_extension_index == 0
1618 ? NULL : warn_extension_table[this->data.warn_extension_index];
1622 ir_variable::count_attribute_slots(bool is_vertex_stage) const
1624 bool is_vs_input = is_vertex_stage && this->data.mode == ir_var_shader_in;
1625 return this->type->count_attribute_slots(is_vs_input);
1628 ir_function_signature::ir_function_signature(const glsl_type *return_type,
1629 builtin_available_predicate b)
1630 : ir_instruction(ir_type_function_signature),
1631 return_type(return_type), is_defined(false),
1632 intrinsic_id(ir_intrinsic_invalid), builtin_avail(b), _function(NULL)
1634 this->origin = NULL;
1639 ir_function_signature::is_builtin() const
1641 return builtin_avail != NULL;
1646 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state *state) const
1648 /* We can't call the predicate without a state pointer, so just say that
1649 * the signature is available. At compile time, we need the filtering,
1650 * but also receive a valid state pointer. At link time, we're resolving
1651 * imported built-in prototypes to their definitions, which will always
1652 * be an exact match. So we can skip the filtering.
1657 assert(builtin_avail != NULL);
1658 return builtin_avail(state);
1663 modes_match(unsigned a, unsigned b)
1668 /* Accept "in" vs. "const in" */
1669 if ((a == ir_var_const_in && b == ir_var_function_in) ||
1670 (b == ir_var_const_in && a == ir_var_function_in))
1678 ir_function_signature::qualifiers_match(exec_list *params)
1680 /* check that the qualifiers match. */
1681 foreach_two_lists(a_node, &this->parameters, b_node, params) {
1682 ir_variable *a = (ir_variable *) a_node;
1683 ir_variable *b = (ir_variable *) b_node;
1685 if (a->data.read_only != b->data.read_only ||
1686 !modes_match(a->data.mode, b->data.mode) ||
1687 a->data.interpolation != b->data.interpolation ||
1688 a->data.centroid != b->data.centroid ||
1689 a->data.sample != b->data.sample ||
1690 a->data.patch != b->data.patch ||
1691 a->data.image_read_only != b->data.image_read_only ||
1692 a->data.image_write_only != b->data.image_write_only ||
1693 a->data.image_coherent != b->data.image_coherent ||
1694 a->data.image_volatile != b->data.image_volatile ||
1695 a->data.image_restrict != b->data.image_restrict) {
1697 /* parameter a's qualifiers don't match */
1706 ir_function_signature::replace_parameters(exec_list *new_params)
1708 /* Destroy all of the previous parameter information. If the previous
1709 * parameter information comes from the function prototype, it may either
1710 * specify incorrect parameter names or not have names at all.
1712 new_params->move_nodes_to(¶meters);
1716 ir_function::ir_function(const char *name)
1717 : ir_instruction(ir_type_function)
1719 this->subroutine_index = -1;
1720 this->name = ralloc_strdup(this, name);
1725 ir_function::has_user_signature()
1727 foreach_in_list(ir_function_signature, sig, &this->signatures) {
1728 if (!sig->is_builtin())
1736 ir_rvalue::error_value(void *mem_ctx)
1738 ir_rvalue *v = new(mem_ctx) ir_rvalue(ir_type_unset);
1740 v->type = glsl_type::error_type;
1746 visit_exec_list(exec_list *list, ir_visitor *visitor)
1748 foreach_in_list_safe(ir_instruction, node, list) {
1749 node->accept(visitor);
1755 steal_memory(ir_instruction *ir, void *new_ctx)
1757 ir_variable *var = ir->as_variable();
1758 ir_function *fn = ir->as_function();
1759 ir_constant *constant = ir->as_constant();
1760 if (var != NULL && var->constant_value != NULL)
1761 steal_memory(var->constant_value, ir);
1763 if (var != NULL && var->constant_initializer != NULL)
1764 steal_memory(var->constant_initializer, ir);
1766 if (fn != NULL && fn->subroutine_types)
1767 ralloc_steal(new_ctx, fn->subroutine_types);
1769 /* The components of aggregate constants are not visited by the normal
1770 * visitor, so steal their values by hand.
1772 if (constant != NULL) {
1773 if (constant->type->is_record()) {
1774 foreach_in_list(ir_constant, field, &constant->components) {
1775 steal_memory(field, ir);
1777 } else if (constant->type->is_array()) {
1778 for (unsigned int i = 0; i < constant->type->length; i++) {
1779 steal_memory(constant->array_elements[i], ir);
1784 ralloc_steal(new_ctx, ir);
1789 reparent_ir(exec_list *list, void *mem_ctx)
1791 foreach_in_list(ir_instruction, node, list) {
1792 visit_tree(node, steal_memory, mem_ctx);
1798 try_min_one(ir_rvalue *ir)
1800 ir_expression *expr = ir->as_expression();
1802 if (!expr || expr->operation != ir_binop_min)
1805 if (expr->operands[0]->is_one())
1806 return expr->operands[1];
1808 if (expr->operands[1]->is_one())
1809 return expr->operands[0];
1815 try_max_zero(ir_rvalue *ir)
1817 ir_expression *expr = ir->as_expression();
1819 if (!expr || expr->operation != ir_binop_max)
1822 if (expr->operands[0]->is_zero())
1823 return expr->operands[1];
1825 if (expr->operands[1]->is_zero())
1826 return expr->operands[0];
1832 ir_rvalue::as_rvalue_to_saturate()
1834 ir_expression *expr = this->as_expression();
1839 ir_rvalue *max_zero = try_max_zero(expr);
1841 return try_min_one(max_zero);
1843 ir_rvalue *min_one = try_min_one(expr);
1845 return try_max_zero(min_one);
1854 vertices_per_prim(GLenum prim)
1863 case GL_LINES_ADJACENCY:
1865 case GL_TRIANGLES_ADJACENCY:
1868 assert(!"Bad primitive");
1874 * Generate a string describing the mode of a variable
1877 mode_string(const ir_variable *var)
1879 switch (var->data.mode) {
1881 return (var->data.read_only) ? "global constant" : "global variable";
1883 case ir_var_uniform:
1886 case ir_var_shader_storage:
1889 case ir_var_shader_in:
1890 return "shader input";
1892 case ir_var_shader_out:
1893 return "shader output";
1895 case ir_var_function_in:
1896 case ir_var_const_in:
1897 return "function input";
1899 case ir_var_function_out:
1900 return "function output";
1902 case ir_var_function_inout:
1903 return "function inout";
1905 case ir_var_system_value:
1906 return "shader input";
1908 case ir_var_temporary:
1909 return "compiler temporary";
1911 case ir_var_mode_count:
1915 assert(!"Should not get here.");
1916 return "invalid variable";