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
;
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
:
267 this->type
= op0
->type
;
271 this->type
= glsl_type::bool_type
;
275 assert(!"not reached: missing automatic type setup for ir_expression");
276 this->type
= op0
->type
;
281 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
283 this->ir_type
= ir_type_expression
;
285 this->operation
= ir_expression_operation(op
);
286 this->operands
[0] = op0
;
287 this->operands
[1] = op1
;
288 this->operands
[2] = NULL
;
289 this->operands
[3] = NULL
;
291 assert(op
> ir_last_unop
);
293 switch (this->operation
) {
294 case ir_binop_all_equal
:
295 case ir_binop_any_nequal
:
296 this->type
= glsl_type::bool_type
;
305 if (op0
->type
->is_scalar()) {
306 this->type
= op1
->type
;
307 } else if (op1
->type
->is_scalar()) {
308 this->type
= op0
->type
;
310 /* FINISHME: matrix types */
311 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
312 assert(op0
->type
== op1
->type
);
313 this->type
= op0
->type
;
317 case ir_binop_logic_and
:
318 case ir_binop_logic_or
:
319 if (op0
->type
->is_scalar()) {
320 this->type
= op1
->type
;
321 } else if (op1
->type
->is_scalar()) {
322 this->type
= op0
->type
;
327 this->type
= glsl_type::float_type
;
331 assert(!"not reached: missing automatic type setup for ir_expression");
332 this->type
= glsl_type::float_type
;
337 ir_expression::get_num_operands(ir_expression_operation op
)
339 assert(op
<= ir_last_opcode
);
341 if (op
<= ir_last_unop
)
344 if (op
<= ir_last_binop
)
347 if (op
== ir_quadop_vector
)
354 static const char *const operator_strs
[] = {
415 const char *ir_expression::operator_string(ir_expression_operation op
)
417 assert((unsigned int) op
< Elements(operator_strs
));
418 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
419 return operator_strs
[op
];
422 const char *ir_expression::operator_string()
424 return operator_string(this->operation
);
427 ir_expression_operation
428 ir_expression::get_operator(const char *str
)
430 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
431 for (int op
= 0; op
< operator_count
; op
++) {
432 if (strcmp(str
, operator_strs
[op
]) == 0)
433 return (ir_expression_operation
) op
;
435 return (ir_expression_operation
) -1;
438 ir_constant::ir_constant()
440 this->ir_type
= ir_type_constant
;
443 ir_constant::ir_constant(const struct glsl_type
*type
,
444 const ir_constant_data
*data
)
446 assert((type
->base_type
>= GLSL_TYPE_UINT
)
447 && (type
->base_type
<= GLSL_TYPE_BOOL
));
449 this->ir_type
= ir_type_constant
;
451 memcpy(& this->value
, data
, sizeof(this->value
));
454 ir_constant::ir_constant(float f
)
456 this->ir_type
= ir_type_constant
;
457 this->type
= glsl_type::float_type
;
458 this->value
.f
[0] = f
;
459 for (int i
= 1; i
< 16; i
++) {
460 this->value
.f
[i
] = 0;
464 ir_constant::ir_constant(unsigned int u
)
466 this->ir_type
= ir_type_constant
;
467 this->type
= glsl_type::uint_type
;
468 this->value
.u
[0] = u
;
469 for (int i
= 1; i
< 16; i
++) {
470 this->value
.u
[i
] = 0;
474 ir_constant::ir_constant(int i
)
476 this->ir_type
= ir_type_constant
;
477 this->type
= glsl_type::int_type
;
478 this->value
.i
[0] = i
;
479 for (int i
= 1; i
< 16; i
++) {
480 this->value
.i
[i
] = 0;
484 ir_constant::ir_constant(bool b
)
486 this->ir_type
= ir_type_constant
;
487 this->type
= glsl_type::bool_type
;
488 this->value
.b
[0] = b
;
489 for (int i
= 1; i
< 16; i
++) {
490 this->value
.b
[i
] = false;
494 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
496 this->ir_type
= ir_type_constant
;
497 this->type
= c
->type
->get_base_type();
499 switch (this->type
->base_type
) {
500 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
501 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
502 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
503 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
504 default: assert(!"Should not get here."); break;
508 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
510 this->ir_type
= ir_type_constant
;
513 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
514 || type
->is_record() || type
->is_array());
516 if (type
->is_array()) {
517 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
519 foreach_list(node
, value_list
) {
520 ir_constant
*value
= (ir_constant
*) node
;
521 assert(value
->as_constant() != NULL
);
523 this->array_elements
[i
++] = value
;
528 /* If the constant is a record, the types of each of the entries in
529 * value_list must be a 1-for-1 match with the structure components. Each
530 * entry must also be a constant. Just move the nodes from the value_list
531 * to the list in the ir_constant.
533 /* FINISHME: Should there be some type checking and / or assertions here? */
534 /* FINISHME: Should the new constant take ownership of the nodes from
535 * FINISHME: value_list, or should it make copies?
537 if (type
->is_record()) {
538 value_list
->move_nodes_to(& this->components
);
542 for (unsigned i
= 0; i
< 16; i
++) {
543 this->value
.u
[i
] = 0;
546 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
548 /* Constructors with exactly one scalar argument are special for vectors
549 * and matrices. For vectors, the scalar value is replicated to fill all
550 * the components. For matrices, the scalar fills the components of the
551 * diagonal while the rest is filled with 0.
553 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
554 if (type
->is_matrix()) {
555 /* Matrix - fill diagonal (rest is already set to 0) */
556 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
557 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
558 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
560 /* Vector or scalar - fill all components */
561 switch (type
->base_type
) {
564 for (unsigned i
= 0; i
< type
->components(); i
++)
565 this->value
.u
[i
] = value
->value
.u
[0];
567 case GLSL_TYPE_FLOAT
:
568 for (unsigned i
= 0; i
< type
->components(); i
++)
569 this->value
.f
[i
] = value
->value
.f
[0];
572 for (unsigned i
= 0; i
< type
->components(); i
++)
573 this->value
.b
[i
] = value
->value
.b
[0];
576 assert(!"Should not get here.");
583 if (type
->is_matrix() && value
->type
->is_matrix()) {
584 assert(value
->next
->is_tail_sentinel());
586 /* From section 5.4.2 of the GLSL 1.20 spec:
587 * "If a matrix is constructed from a matrix, then each component
588 * (column i, row j) in the result that has a corresponding component
589 * (column i, row j) in the argument will be initialized from there."
591 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
592 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
593 for (unsigned i
= 0; i
< cols
; i
++) {
594 for (unsigned j
= 0; j
< rows
; j
++) {
595 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
596 const unsigned dst
= i
* type
->vector_elements
+ j
;
597 this->value
.f
[dst
] = value
->value
.f
[src
];
601 /* "All other components will be initialized to the identity matrix." */
602 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
603 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
608 /* Use each component from each entry in the value_list to initialize one
609 * component of the constant being constructed.
611 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
612 assert(value
->as_constant() != NULL
);
613 assert(!value
->is_tail_sentinel());
615 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
616 switch (type
->base_type
) {
618 this->value
.u
[i
] = value
->get_uint_component(j
);
621 this->value
.i
[i
] = value
->get_int_component(j
);
623 case GLSL_TYPE_FLOAT
:
624 this->value
.f
[i
] = value
->get_float_component(j
);
627 this->value
.b
[i
] = value
->get_bool_component(j
);
630 /* FINISHME: What to do? Exceptions are not the answer.
636 if (i
>= type
->components())
640 value
= (ir_constant
*) value
->next
;
645 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
647 assert(type
->is_numeric() || type
->is_boolean());
649 ir_constant
*c
= new(mem_ctx
) ir_constant
;
651 memset(&c
->value
, 0, sizeof(c
->value
));
657 ir_constant::get_bool_component(unsigned i
) const
659 switch (this->type
->base_type
) {
660 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
661 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
662 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
663 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
664 default: assert(!"Should not get here."); break;
667 /* Must return something to make the compiler happy. This is clearly an
674 ir_constant::get_float_component(unsigned i
) const
676 switch (this->type
->base_type
) {
677 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
678 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
679 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
680 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
681 default: assert(!"Should not get here."); break;
684 /* Must return something to make the compiler happy. This is clearly an
691 ir_constant::get_int_component(unsigned i
) const
693 switch (this->type
->base_type
) {
694 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
695 case GLSL_TYPE_INT
: return this->value
.i
[i
];
696 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
697 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
698 default: assert(!"Should not get here."); break;
701 /* Must return something to make the compiler happy. This is clearly an
708 ir_constant::get_uint_component(unsigned i
) const
710 switch (this->type
->base_type
) {
711 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
712 case GLSL_TYPE_INT
: return this->value
.i
[i
];
713 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
714 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
715 default: assert(!"Should not get here."); break;
718 /* Must return something to make the compiler happy. This is clearly an
725 ir_constant::get_array_element(unsigned i
) const
727 assert(this->type
->is_array());
729 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
731 * "Behavior is undefined if a shader subscripts an array with an index
732 * less than 0 or greater than or equal to the size the array was
735 * Most out-of-bounds accesses are removed before things could get this far.
736 * There are cases where non-constant array index values can get constant
741 else if (i
>= this->type
->length
)
742 i
= this->type
->length
- 1;
744 return array_elements
[i
];
748 ir_constant::get_record_field(const char *name
)
750 int idx
= this->type
->field_index(name
);
755 if (this->components
.is_empty())
758 exec_node
*node
= this->components
.head
;
759 for (int i
= 0; i
< idx
; i
++) {
762 /* If the end of the list is encountered before the element matching the
763 * requested field is found, return NULL.
765 if (node
->is_tail_sentinel())
769 return (ir_constant
*) node
;
774 ir_constant::has_value(const ir_constant
*c
) const
776 if (this->type
!= c
->type
)
779 if (this->type
->is_array()) {
780 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
781 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
787 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
788 const exec_node
*a_node
= this->components
.head
;
789 const exec_node
*b_node
= c
->components
.head
;
791 while (!a_node
->is_tail_sentinel()) {
792 assert(!b_node
->is_tail_sentinel());
794 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
795 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
797 if (!a_field
->has_value(b_field
))
800 a_node
= a_node
->next
;
801 b_node
= b_node
->next
;
807 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
808 switch (this->type
->base_type
) {
810 if (this->value
.u
[i
] != c
->value
.u
[i
])
814 if (this->value
.i
[i
] != c
->value
.i
[i
])
817 case GLSL_TYPE_FLOAT
:
818 if (this->value
.f
[i
] != c
->value
.f
[i
])
822 if (this->value
.b
[i
] != c
->value
.b
[i
])
826 assert(!"Should not get here.");
835 ir_constant::is_zero() const
837 if (!this->type
->is_scalar() && !this->type
->is_vector())
840 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
841 switch (this->type
->base_type
) {
842 case GLSL_TYPE_FLOAT
:
843 if (this->value
.f
[c
] != 0.0)
847 if (this->value
.i
[c
] != 0)
851 if (this->value
.u
[c
] != 0)
855 if (this->value
.b
[c
] != false)
859 /* The only other base types are structures, arrays, and samplers.
860 * Samplers cannot be constants, and the others should have been
861 * filtered out above.
863 assert(!"Should not get here.");
872 ir_constant::is_one() const
874 if (!this->type
->is_scalar() && !this->type
->is_vector())
877 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
878 switch (this->type
->base_type
) {
879 case GLSL_TYPE_FLOAT
:
880 if (this->value
.f
[c
] != 1.0)
884 if (this->value
.i
[c
] != 1)
888 if (this->value
.u
[c
] != 1)
892 if (this->value
.b
[c
] != true)
896 /* The only other base types are structures, arrays, and samplers.
897 * Samplers cannot be constants, and the others should have been
898 * filtered out above.
900 assert(!"Should not get here.");
909 ir_constant::is_negative_one() const
911 if (!this->type
->is_scalar() && !this->type
->is_vector())
914 if (this->type
->is_boolean())
917 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
918 switch (this->type
->base_type
) {
919 case GLSL_TYPE_FLOAT
:
920 if (this->value
.f
[c
] != -1.0)
924 if (this->value
.i
[c
] != -1)
928 if (int(this->value
.u
[c
]) != -1)
932 /* The only other base types are structures, arrays, samplers, and
933 * booleans. Samplers cannot be constants, and the others should
934 * have been filtered out above.
936 assert(!"Should not get here.");
946 this->ir_type
= ir_type_loop
;
947 this->cmp
= ir_unop_neg
;
950 this->increment
= NULL
;
951 this->counter
= NULL
;
955 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
957 this->ir_type
= ir_type_dereference_variable
;
959 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
963 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
964 ir_rvalue
*array_index
)
966 this->ir_type
= ir_type_dereference_array
;
967 this->array_index
= array_index
;
968 this->set_array(value
);
972 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
973 ir_rvalue
*array_index
)
975 void *ctx
= talloc_parent(var
);
977 this->ir_type
= ir_type_dereference_array
;
978 this->array_index
= array_index
;
979 this->set_array(new(ctx
) ir_dereference_variable(var
));
984 ir_dereference_array::set_array(ir_rvalue
*value
)
987 this->type
= glsl_type::error_type
;
989 if (this->array
!= NULL
) {
990 const glsl_type
*const vt
= this->array
->type
;
992 if (vt
->is_array()) {
993 type
= vt
->element_type();
994 } else if (vt
->is_matrix()) {
995 type
= vt
->column_type();
996 } else if (vt
->is_vector()) {
997 type
= vt
->get_base_type();
1003 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1006 this->ir_type
= ir_type_dereference_record
;
1007 this->record
= value
;
1008 this->field
= talloc_strdup(this, field
);
1009 this->type
= (this->record
!= NULL
)
1010 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
1014 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1017 void *ctx
= talloc_parent(var
);
1019 this->ir_type
= ir_type_dereference_record
;
1020 this->record
= new(ctx
) ir_dereference_variable(var
);
1021 this->field
= talloc_strdup(this, field
);
1022 this->type
= (this->record
!= NULL
)
1023 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
1026 bool type_contains_sampler(const glsl_type
*type
)
1028 if (type
->is_array()) {
1029 return type_contains_sampler(type
->fields
.array
);
1030 } else if (type
->is_record()) {
1031 for (unsigned int i
= 0; i
< type
->length
; i
++) {
1032 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
1037 return type
->is_sampler();
1042 ir_dereference::is_lvalue()
1044 ir_variable
*var
= this->variable_referenced();
1046 /* Every l-value derference chain eventually ends in a variable.
1048 if ((var
== NULL
) || var
->read_only
)
1051 if (this->type
->is_array() && !var
->array_lvalue
)
1054 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1056 * "Samplers cannot be treated as l-values; hence cannot be used
1057 * as out or inout function parameters, nor can they be
1060 if (type_contains_sampler(this->type
))
1067 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
1069 const char *ir_texture::opcode_string()
1071 assert((unsigned int) op
<=
1072 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1073 return tex_opcode_strs
[op
];
1077 ir_texture::get_opcode(const char *str
)
1079 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1080 for (int op
= 0; op
< count
; op
++) {
1081 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1082 return (ir_texture_opcode
) op
;
1084 return (ir_texture_opcode
) -1;
1089 ir_texture::set_sampler(ir_dereference
*sampler
)
1091 assert(sampler
!= NULL
);
1092 this->sampler
= sampler
;
1094 switch (sampler
->type
->sampler_type
) {
1095 case GLSL_TYPE_FLOAT
:
1096 this->type
= glsl_type::vec4_type
;
1099 this->type
= glsl_type::ivec4_type
;
1101 case GLSL_TYPE_UINT
:
1102 this->type
= glsl_type::uvec4_type
;
1109 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1111 assert((count
>= 1) && (count
<= 4));
1113 memset(&this->mask
, 0, sizeof(this->mask
));
1114 this->mask
.num_components
= count
;
1116 unsigned dup_mask
= 0;
1119 assert(comp
[3] <= 3);
1120 dup_mask
|= (1U << comp
[3])
1121 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1122 this->mask
.w
= comp
[3];
1125 assert(comp
[2] <= 3);
1126 dup_mask
|= (1U << comp
[2])
1127 & ((1U << comp
[0]) | (1U << comp
[1]));
1128 this->mask
.z
= comp
[2];
1131 assert(comp
[1] <= 3);
1132 dup_mask
|= (1U << comp
[1])
1133 & ((1U << comp
[0]));
1134 this->mask
.y
= comp
[1];
1137 assert(comp
[0] <= 3);
1138 this->mask
.x
= comp
[0];
1141 this->mask
.has_duplicates
= dup_mask
!= 0;
1143 /* Based on the number of elements in the swizzle and the base type
1144 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1145 * generate the type of the resulting value.
1147 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1150 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1151 unsigned w
, unsigned count
)
1154 const unsigned components
[4] = { x
, y
, z
, w
};
1155 this->ir_type
= ir_type_swizzle
;
1156 this->init_mask(components
, count
);
1159 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1163 this->ir_type
= ir_type_swizzle
;
1164 this->init_mask(comp
, count
);
1167 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1169 this->ir_type
= ir_type_swizzle
;
1172 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1173 mask
.num_components
, 1);
1182 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1184 void *ctx
= talloc_parent(val
);
1186 /* For each possible swizzle character, this table encodes the value in
1187 * \c idx_map that represents the 0th element of the vector. For invalid
1188 * swizzle characters (e.g., 'k'), a special value is used that will allow
1189 * detection of errors.
1191 static const unsigned char base_idx
[26] = {
1192 /* a b c d e f g h i j k l m */
1193 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1194 /* n o p q r s t u v w x y z */
1195 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1198 /* Each valid swizzle character has an entry in the previous table. This
1199 * table encodes the base index encoded in the previous table plus the actual
1200 * index of the swizzle character. When processing swizzles, the first
1201 * character in the string is indexed in the previous table. Each character
1202 * in the string is indexed in this table, and the value found there has the
1203 * value form the first table subtracted. The result must be on the range
1206 * For example, the string "wzyx" will get X from the first table. Each of
1207 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1208 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1210 * The string "wzrg" will get X from the first table. Each of the characters
1211 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1212 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1213 * [0,3], the error is detected.
1215 static const unsigned char idx_map
[26] = {
1216 /* a b c d e f g h i j k l m */
1217 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1218 /* n o p q r s t u v w x y z */
1219 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1222 int swiz_idx
[4] = { 0, 0, 0, 0 };
1226 /* Validate the first character in the swizzle string and look up the base
1227 * index value as described above.
1229 if ((str
[0] < 'a') || (str
[0] > 'z'))
1232 const unsigned base
= base_idx
[str
[0] - 'a'];
1235 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1236 /* Validate the next character, and, as described above, convert it to a
1239 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1242 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1243 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1250 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1260 ir_swizzle::variable_referenced()
1262 return this->val
->variable_referenced();
1266 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1267 ir_variable_mode mode
)
1268 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1269 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1271 this->ir_type
= ir_type_variable
;
1273 this->name
= talloc_strdup(this, name
);
1274 this->explicit_location
= false;
1275 this->location
= -1;
1276 this->warn_extension
= NULL
;
1277 this->constant_value
= NULL
;
1278 this->origin_upper_left
= false;
1279 this->pixel_center_integer
= false;
1281 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1282 this->read_only
= true;
1287 ir_variable::interpolation_string() const
1289 switch (this->interpolation
) {
1290 case ir_var_smooth
: return "smooth";
1291 case ir_var_flat
: return "flat";
1292 case ir_var_noperspective
: return "noperspective";
1295 assert(!"Should not get here.");
1301 ir_variable::component_slots() const
1303 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1304 return this->type
->component_slots();
1308 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1309 : return_type(return_type
), is_defined(false), _function(NULL
)
1311 this->ir_type
= ir_type_function_signature
;
1312 this->is_builtin
= false;
1317 ir_function_signature::qualifiers_match(exec_list
*params
)
1319 exec_list_iterator iter_a
= parameters
.iterator();
1320 exec_list_iterator iter_b
= params
->iterator();
1322 /* check that the qualifiers match. */
1323 while (iter_a
.has_next()) {
1324 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1325 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1327 if (a
->read_only
!= b
->read_only
||
1328 a
->mode
!= b
->mode
||
1329 a
->interpolation
!= b
->interpolation
||
1330 a
->centroid
!= b
->centroid
) {
1332 /* parameter a's qualifiers don't match */
1344 ir_function_signature::replace_parameters(exec_list
*new_params
)
1346 /* Destroy all of the previous parameter information. If the previous
1347 * parameter information comes from the function prototype, it may either
1348 * specify incorrect parameter names or not have names at all.
1350 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1351 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1356 new_params
->move_nodes_to(¶meters
);
1360 ir_function::ir_function(const char *name
)
1362 this->ir_type
= ir_type_function
;
1363 this->name
= talloc_strdup(this, name
);
1368 ir_function::has_user_signature()
1370 foreach_list(n
, &this->signatures
) {
1371 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1372 if (!sig
->is_builtin
)
1380 ir_call::get_error_instruction(void *ctx
)
1382 ir_call
*call
= new(ctx
) ir_call
;
1384 call
->type
= glsl_type::error_type
;
1389 ir_call::set_callee(ir_function_signature
*sig
)
1391 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1397 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1399 foreach_iter(exec_list_iterator
, iter
, *list
) {
1400 ((ir_instruction
*)iter
.get())->accept(visitor
);
1406 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1408 ir_variable
*var
= ir
->as_variable();
1409 ir_constant
*constant
= ir
->as_constant();
1410 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1411 steal_memory(var
->constant_value
, ir
);
1413 /* The components of aggregate constants are not visited by the normal
1414 * visitor, so steal their values by hand.
1416 if (constant
!= NULL
) {
1417 if (constant
->type
->is_record()) {
1418 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1419 ir_constant
*field
= (ir_constant
*)iter
.get();
1420 steal_memory(field
, ir
);
1422 } else if (constant
->type
->is_array()) {
1423 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1424 steal_memory(constant
->array_elements
[i
], ir
);
1429 talloc_steal(new_ctx
, ir
);
1434 reparent_ir(exec_list
*list
, void *mem_ctx
)
1436 foreach_list(node
, list
) {
1437 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1443 try_min_one(ir_rvalue
*ir
)
1445 ir_expression
*expr
= ir
->as_expression();
1447 if (!expr
|| expr
->operation
!= ir_binop_min
)
1450 if (expr
->operands
[0]->is_one())
1451 return expr
->operands
[1];
1453 if (expr
->operands
[1]->is_one())
1454 return expr
->operands
[0];
1460 try_max_zero(ir_rvalue
*ir
)
1462 ir_expression
*expr
= ir
->as_expression();
1464 if (!expr
|| expr
->operation
!= ir_binop_max
)
1467 if (expr
->operands
[0]->is_zero())
1468 return expr
->operands
[1];
1470 if (expr
->operands
[1]->is_zero())
1471 return expr
->operands
[0];
1477 ir_rvalue::as_rvalue_to_saturate()
1479 ir_expression
*expr
= this->as_expression();
1484 ir_rvalue
*max_zero
= try_max_zero(expr
);
1486 return try_min_one(max_zero
);
1488 ir_rvalue
*min_one
= try_min_one(expr
);
1490 return try_max_zero(min_one
);