2 * Copyright © 2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
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
;
235 ir_expression::get_num_operands(ir_expression_operation op
)
237 assert(op
<= ir_last_opcode
);
239 if (op
<= ir_last_unop
)
242 if (op
<= ir_last_binop
)
245 if (op
== ir_quadop_vector
)
252 static const char *const operator_strs
[] = {
313 const char *ir_expression::operator_string(ir_expression_operation op
)
315 assert((unsigned int) op
< Elements(operator_strs
));
316 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
317 return operator_strs
[op
];
320 const char *ir_expression::operator_string()
322 return operator_string(this->operation
);
325 ir_expression_operation
326 ir_expression::get_operator(const char *str
)
328 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
329 for (int op
= 0; op
< operator_count
; op
++) {
330 if (strcmp(str
, operator_strs
[op
]) == 0)
331 return (ir_expression_operation
) op
;
333 return (ir_expression_operation
) -1;
336 ir_constant::ir_constant()
338 this->ir_type
= ir_type_constant
;
341 ir_constant::ir_constant(const struct glsl_type
*type
,
342 const ir_constant_data
*data
)
344 assert((type
->base_type
>= GLSL_TYPE_UINT
)
345 && (type
->base_type
<= GLSL_TYPE_BOOL
));
347 this->ir_type
= ir_type_constant
;
349 memcpy(& this->value
, data
, sizeof(this->value
));
352 ir_constant::ir_constant(float f
)
354 this->ir_type
= ir_type_constant
;
355 this->type
= glsl_type::float_type
;
356 this->value
.f
[0] = f
;
357 for (int i
= 1; i
< 16; i
++) {
358 this->value
.f
[i
] = 0;
362 ir_constant::ir_constant(unsigned int u
)
364 this->ir_type
= ir_type_constant
;
365 this->type
= glsl_type::uint_type
;
366 this->value
.u
[0] = u
;
367 for (int i
= 1; i
< 16; i
++) {
368 this->value
.u
[i
] = 0;
372 ir_constant::ir_constant(int i
)
374 this->ir_type
= ir_type_constant
;
375 this->type
= glsl_type::int_type
;
376 this->value
.i
[0] = i
;
377 for (int i
= 1; i
< 16; i
++) {
378 this->value
.i
[i
] = 0;
382 ir_constant::ir_constant(bool b
)
384 this->ir_type
= ir_type_constant
;
385 this->type
= glsl_type::bool_type
;
386 this->value
.b
[0] = b
;
387 for (int i
= 1; i
< 16; i
++) {
388 this->value
.b
[i
] = false;
392 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
394 this->ir_type
= ir_type_constant
;
395 this->type
= c
->type
->get_base_type();
397 switch (this->type
->base_type
) {
398 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
399 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
400 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
401 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
402 default: assert(!"Should not get here."); break;
406 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
408 this->ir_type
= ir_type_constant
;
411 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
412 || type
->is_record() || type
->is_array());
414 if (type
->is_array()) {
415 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
417 foreach_list(node
, value_list
) {
418 ir_constant
*value
= (ir_constant
*) node
;
419 assert(value
->as_constant() != NULL
);
421 this->array_elements
[i
++] = value
;
426 /* If the constant is a record, the types of each of the entries in
427 * value_list must be a 1-for-1 match with the structure components. Each
428 * entry must also be a constant. Just move the nodes from the value_list
429 * to the list in the ir_constant.
431 /* FINISHME: Should there be some type checking and / or assertions here? */
432 /* FINISHME: Should the new constant take ownership of the nodes from
433 * FINISHME: value_list, or should it make copies?
435 if (type
->is_record()) {
436 value_list
->move_nodes_to(& this->components
);
440 for (unsigned i
= 0; i
< 16; i
++) {
441 this->value
.u
[i
] = 0;
444 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
446 /* Constructors with exactly one scalar argument are special for vectors
447 * and matrices. For vectors, the scalar value is replicated to fill all
448 * the components. For matrices, the scalar fills the components of the
449 * diagonal while the rest is filled with 0.
451 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
452 if (type
->is_matrix()) {
453 /* Matrix - fill diagonal (rest is already set to 0) */
454 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
455 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
456 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
458 /* Vector or scalar - fill all components */
459 switch (type
->base_type
) {
462 for (unsigned i
= 0; i
< type
->components(); i
++)
463 this->value
.u
[i
] = value
->value
.u
[0];
465 case GLSL_TYPE_FLOAT
:
466 for (unsigned i
= 0; i
< type
->components(); i
++)
467 this->value
.f
[i
] = value
->value
.f
[0];
470 for (unsigned i
= 0; i
< type
->components(); i
++)
471 this->value
.b
[i
] = value
->value
.b
[0];
474 assert(!"Should not get here.");
481 if (type
->is_matrix() && value
->type
->is_matrix()) {
482 assert(value
->next
->is_tail_sentinel());
484 /* From section 5.4.2 of the GLSL 1.20 spec:
485 * "If a matrix is constructed from a matrix, then each component
486 * (column i, row j) in the result that has a corresponding component
487 * (column i, row j) in the argument will be initialized from there."
489 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
490 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
491 for (unsigned i
= 0; i
< cols
; i
++) {
492 for (unsigned j
= 0; j
< rows
; j
++) {
493 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
494 const unsigned dst
= i
* type
->vector_elements
+ j
;
495 this->value
.f
[dst
] = value
->value
.f
[src
];
499 /* "All other components will be initialized to the identity matrix." */
500 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
501 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
506 /* Use each component from each entry in the value_list to initialize one
507 * component of the constant being constructed.
509 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
510 assert(value
->as_constant() != NULL
);
511 assert(!value
->is_tail_sentinel());
513 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
514 switch (type
->base_type
) {
516 this->value
.u
[i
] = value
->get_uint_component(j
);
519 this->value
.i
[i
] = value
->get_int_component(j
);
521 case GLSL_TYPE_FLOAT
:
522 this->value
.f
[i
] = value
->get_float_component(j
);
525 this->value
.b
[i
] = value
->get_bool_component(j
);
528 /* FINISHME: What to do? Exceptions are not the answer.
534 if (i
>= type
->components())
538 value
= (ir_constant
*) value
->next
;
543 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
545 assert(type
->is_numeric() || type
->is_boolean());
547 ir_constant
*c
= new(mem_ctx
) ir_constant
;
549 memset(&c
->value
, 0, sizeof(c
->value
));
555 ir_constant::get_bool_component(unsigned i
) const
557 switch (this->type
->base_type
) {
558 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
559 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
560 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
561 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
562 default: assert(!"Should not get here."); break;
565 /* Must return something to make the compiler happy. This is clearly an
572 ir_constant::get_float_component(unsigned i
) const
574 switch (this->type
->base_type
) {
575 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
576 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
577 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
578 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
579 default: assert(!"Should not get here."); break;
582 /* Must return something to make the compiler happy. This is clearly an
589 ir_constant::get_int_component(unsigned i
) const
591 switch (this->type
->base_type
) {
592 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
593 case GLSL_TYPE_INT
: return this->value
.i
[i
];
594 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
595 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
596 default: assert(!"Should not get here."); break;
599 /* Must return something to make the compiler happy. This is clearly an
606 ir_constant::get_uint_component(unsigned i
) const
608 switch (this->type
->base_type
) {
609 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
610 case GLSL_TYPE_INT
: return this->value
.i
[i
];
611 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
612 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
613 default: assert(!"Should not get here."); break;
616 /* Must return something to make the compiler happy. This is clearly an
623 ir_constant::get_array_element(unsigned i
) const
625 assert(this->type
->is_array());
627 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
629 * "Behavior is undefined if a shader subscripts an array with an index
630 * less than 0 or greater than or equal to the size the array was
633 * Most out-of-bounds accesses are removed before things could get this far.
634 * There are cases where non-constant array index values can get constant
639 else if (i
>= this->type
->length
)
640 i
= this->type
->length
- 1;
642 return array_elements
[i
];
646 ir_constant::get_record_field(const char *name
)
648 int idx
= this->type
->field_index(name
);
653 if (this->components
.is_empty())
656 exec_node
*node
= this->components
.head
;
657 for (int i
= 0; i
< idx
; i
++) {
660 /* If the end of the list is encountered before the element matching the
661 * requested field is found, return NULL.
663 if (node
->is_tail_sentinel())
667 return (ir_constant
*) node
;
672 ir_constant::has_value(const ir_constant
*c
) const
674 if (this->type
!= c
->type
)
677 if (this->type
->is_array()) {
678 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
679 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
685 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
686 const exec_node
*a_node
= this->components
.head
;
687 const exec_node
*b_node
= c
->components
.head
;
689 while (!a_node
->is_tail_sentinel()) {
690 assert(!b_node
->is_tail_sentinel());
692 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
693 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
695 if (!a_field
->has_value(b_field
))
698 a_node
= a_node
->next
;
699 b_node
= b_node
->next
;
705 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
706 switch (this->type
->base_type
) {
708 if (this->value
.u
[i
] != c
->value
.u
[i
])
712 if (this->value
.i
[i
] != c
->value
.i
[i
])
715 case GLSL_TYPE_FLOAT
:
716 if (this->value
.f
[i
] != c
->value
.f
[i
])
720 if (this->value
.b
[i
] != c
->value
.b
[i
])
724 assert(!"Should not get here.");
733 ir_constant::is_zero() const
735 if (!this->type
->is_scalar() && !this->type
->is_vector())
738 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
739 switch (this->type
->base_type
) {
740 case GLSL_TYPE_FLOAT
:
741 if (this->value
.f
[c
] != 0.0)
745 if (this->value
.i
[c
] != 0)
749 if (this->value
.u
[c
] != 0)
753 if (this->value
.b
[c
] != false)
757 /* The only other base types are structures, arrays, and samplers.
758 * Samplers cannot be constants, and the others should have been
759 * filtered out above.
761 assert(!"Should not get here.");
770 ir_constant::is_one() const
772 if (!this->type
->is_scalar() && !this->type
->is_vector())
775 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
776 switch (this->type
->base_type
) {
777 case GLSL_TYPE_FLOAT
:
778 if (this->value
.f
[c
] != 1.0)
782 if (this->value
.i
[c
] != 1)
786 if (this->value
.u
[c
] != 1)
790 if (this->value
.b
[c
] != true)
794 /* The only other base types are structures, arrays, and samplers.
795 * Samplers cannot be constants, and the others should have been
796 * filtered out above.
798 assert(!"Should not get here.");
807 ir_constant::is_negative_one() const
809 if (!this->type
->is_scalar() && !this->type
->is_vector())
812 if (this->type
->is_boolean())
815 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
816 switch (this->type
->base_type
) {
817 case GLSL_TYPE_FLOAT
:
818 if (this->value
.f
[c
] != -1.0)
822 if (this->value
.i
[c
] != -1)
826 if (int(this->value
.u
[c
]) != -1)
830 /* The only other base types are structures, arrays, samplers, and
831 * booleans. Samplers cannot be constants, and the others should
832 * have been filtered out above.
834 assert(!"Should not get here.");
844 this->ir_type
= ir_type_loop
;
845 this->cmp
= ir_unop_neg
;
848 this->increment
= NULL
;
849 this->counter
= NULL
;
853 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
855 this->ir_type
= ir_type_dereference_variable
;
857 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
861 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
862 ir_rvalue
*array_index
)
864 this->ir_type
= ir_type_dereference_array
;
865 this->array_index
= array_index
;
866 this->set_array(value
);
870 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
871 ir_rvalue
*array_index
)
873 void *ctx
= talloc_parent(var
);
875 this->ir_type
= ir_type_dereference_array
;
876 this->array_index
= array_index
;
877 this->set_array(new(ctx
) ir_dereference_variable(var
));
882 ir_dereference_array::set_array(ir_rvalue
*value
)
885 this->type
= glsl_type::error_type
;
887 if (this->array
!= NULL
) {
888 const glsl_type
*const vt
= this->array
->type
;
890 if (vt
->is_array()) {
891 type
= vt
->element_type();
892 } else if (vt
->is_matrix()) {
893 type
= vt
->column_type();
894 } else if (vt
->is_vector()) {
895 type
= vt
->get_base_type();
901 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
904 this->ir_type
= ir_type_dereference_record
;
905 this->record
= value
;
906 this->field
= talloc_strdup(this, field
);
907 this->type
= (this->record
!= NULL
)
908 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
912 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
915 void *ctx
= talloc_parent(var
);
917 this->ir_type
= ir_type_dereference_record
;
918 this->record
= new(ctx
) ir_dereference_variable(var
);
919 this->field
= talloc_strdup(this, field
);
920 this->type
= (this->record
!= NULL
)
921 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
924 bool type_contains_sampler(const glsl_type
*type
)
926 if (type
->is_array()) {
927 return type_contains_sampler(type
->fields
.array
);
928 } else if (type
->is_record()) {
929 for (unsigned int i
= 0; i
< type
->length
; i
++) {
930 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
935 return type
->is_sampler();
940 ir_dereference::is_lvalue()
942 ir_variable
*var
= this->variable_referenced();
944 /* Every l-value derference chain eventually ends in a variable.
946 if ((var
== NULL
) || var
->read_only
)
949 if (this->type
->is_array() && !var
->array_lvalue
)
952 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
954 * "Samplers cannot be treated as l-values; hence cannot be used
955 * as out or inout function parameters, nor can they be
958 if (type_contains_sampler(this->type
))
965 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
967 const char *ir_texture::opcode_string()
969 assert((unsigned int) op
<=
970 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
971 return tex_opcode_strs
[op
];
975 ir_texture::get_opcode(const char *str
)
977 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
978 for (int op
= 0; op
< count
; op
++) {
979 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
980 return (ir_texture_opcode
) op
;
982 return (ir_texture_opcode
) -1;
987 ir_texture::set_sampler(ir_dereference
*sampler
)
989 assert(sampler
!= NULL
);
990 this->sampler
= sampler
;
992 switch (sampler
->type
->sampler_type
) {
993 case GLSL_TYPE_FLOAT
:
994 this->type
= glsl_type::vec4_type
;
997 this->type
= glsl_type::ivec4_type
;
1000 this->type
= glsl_type::uvec4_type
;
1007 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1009 assert((count
>= 1) && (count
<= 4));
1011 memset(&this->mask
, 0, sizeof(this->mask
));
1012 this->mask
.num_components
= count
;
1014 unsigned dup_mask
= 0;
1017 assert(comp
[3] <= 3);
1018 dup_mask
|= (1U << comp
[3])
1019 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1020 this->mask
.w
= comp
[3];
1023 assert(comp
[2] <= 3);
1024 dup_mask
|= (1U << comp
[2])
1025 & ((1U << comp
[0]) | (1U << comp
[1]));
1026 this->mask
.z
= comp
[2];
1029 assert(comp
[1] <= 3);
1030 dup_mask
|= (1U << comp
[1])
1031 & ((1U << comp
[0]));
1032 this->mask
.y
= comp
[1];
1035 assert(comp
[0] <= 3);
1036 this->mask
.x
= comp
[0];
1039 this->mask
.has_duplicates
= dup_mask
!= 0;
1041 /* Based on the number of elements in the swizzle and the base type
1042 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1043 * generate the type of the resulting value.
1045 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1048 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1049 unsigned w
, unsigned count
)
1052 const unsigned components
[4] = { x
, y
, z
, w
};
1053 this->ir_type
= ir_type_swizzle
;
1054 this->init_mask(components
, count
);
1057 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1061 this->ir_type
= ir_type_swizzle
;
1062 this->init_mask(comp
, count
);
1065 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1067 this->ir_type
= ir_type_swizzle
;
1070 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1071 mask
.num_components
, 1);
1080 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1082 void *ctx
= talloc_parent(val
);
1084 /* For each possible swizzle character, this table encodes the value in
1085 * \c idx_map that represents the 0th element of the vector. For invalid
1086 * swizzle characters (e.g., 'k'), a special value is used that will allow
1087 * detection of errors.
1089 static const unsigned char base_idx
[26] = {
1090 /* a b c d e f g h i j k l m */
1091 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1092 /* n o p q r s t u v w x y z */
1093 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1096 /* Each valid swizzle character has an entry in the previous table. This
1097 * table encodes the base index encoded in the previous table plus the actual
1098 * index of the swizzle character. When processing swizzles, the first
1099 * character in the string is indexed in the previous table. Each character
1100 * in the string is indexed in this table, and the value found there has the
1101 * value form the first table subtracted. The result must be on the range
1104 * For example, the string "wzyx" will get X from the first table. Each of
1105 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1106 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1108 * The string "wzrg" will get X from the first table. Each of the characters
1109 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1110 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1111 * [0,3], the error is detected.
1113 static const unsigned char idx_map
[26] = {
1114 /* a b c d e f g h i j k l m */
1115 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1116 /* n o p q r s t u v w x y z */
1117 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1120 int swiz_idx
[4] = { 0, 0, 0, 0 };
1124 /* Validate the first character in the swizzle string and look up the base
1125 * index value as described above.
1127 if ((str
[0] < 'a') || (str
[0] > 'z'))
1130 const unsigned base
= base_idx
[str
[0] - 'a'];
1133 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1134 /* Validate the next character, and, as described above, convert it to a
1137 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1140 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1141 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1148 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1158 ir_swizzle::variable_referenced()
1160 return this->val
->variable_referenced();
1164 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1165 ir_variable_mode mode
)
1166 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1167 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1169 this->ir_type
= ir_type_variable
;
1171 this->name
= talloc_strdup(this, name
);
1172 this->explicit_location
= false;
1173 this->location
= -1;
1174 this->warn_extension
= NULL
;
1175 this->constant_value
= NULL
;
1176 this->origin_upper_left
= false;
1177 this->pixel_center_integer
= false;
1179 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1180 this->read_only
= true;
1185 ir_variable::interpolation_string() const
1187 switch (this->interpolation
) {
1188 case ir_var_smooth
: return "smooth";
1189 case ir_var_flat
: return "flat";
1190 case ir_var_noperspective
: return "noperspective";
1193 assert(!"Should not get here.");
1199 ir_variable::component_slots() const
1201 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1202 return this->type
->component_slots();
1206 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1207 : return_type(return_type
), is_defined(false), _function(NULL
)
1209 this->ir_type
= ir_type_function_signature
;
1210 this->is_builtin
= false;
1215 ir_function_signature::qualifiers_match(exec_list
*params
)
1217 exec_list_iterator iter_a
= parameters
.iterator();
1218 exec_list_iterator iter_b
= params
->iterator();
1220 /* check that the qualifiers match. */
1221 while (iter_a
.has_next()) {
1222 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1223 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1225 if (a
->read_only
!= b
->read_only
||
1226 a
->mode
!= b
->mode
||
1227 a
->interpolation
!= b
->interpolation
||
1228 a
->centroid
!= b
->centroid
) {
1230 /* parameter a's qualifiers don't match */
1242 ir_function_signature::replace_parameters(exec_list
*new_params
)
1244 /* Destroy all of the previous parameter information. If the previous
1245 * parameter information comes from the function prototype, it may either
1246 * specify incorrect parameter names or not have names at all.
1248 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1249 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1254 new_params
->move_nodes_to(¶meters
);
1258 ir_function::ir_function(const char *name
)
1260 this->ir_type
= ir_type_function
;
1261 this->name
= talloc_strdup(this, name
);
1266 ir_function::has_user_signature()
1268 foreach_list(n
, &this->signatures
) {
1269 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1270 if (!sig
->is_builtin
)
1278 ir_call::get_error_instruction(void *ctx
)
1280 ir_call
*call
= new(ctx
) ir_call
;
1282 call
->type
= glsl_type::error_type
;
1287 ir_call::set_callee(ir_function_signature
*sig
)
1289 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1295 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1297 foreach_iter(exec_list_iterator
, iter
, *list
) {
1298 ((ir_instruction
*)iter
.get())->accept(visitor
);
1304 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1306 ir_variable
*var
= ir
->as_variable();
1307 ir_constant
*constant
= ir
->as_constant();
1308 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1309 steal_memory(var
->constant_value
, ir
);
1311 /* The components of aggregate constants are not visited by the normal
1312 * visitor, so steal their values by hand.
1314 if (constant
!= NULL
) {
1315 if (constant
->type
->is_record()) {
1316 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1317 ir_constant
*field
= (ir_constant
*)iter
.get();
1318 steal_memory(field
, ir
);
1320 } else if (constant
->type
->is_array()) {
1321 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1322 steal_memory(constant
->array_elements
[i
], ir
);
1327 talloc_steal(new_ctx
, ir
);
1332 reparent_ir(exec_list
*list
, void *mem_ctx
)
1334 foreach_list(node
, list
) {
1335 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);