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
;
35 * Modify the swizzle make to move one component to another
37 * \param m IR swizzle to be modified
38 * \param from Component in the RHS that is to be swizzled
39 * \param to Desired swizzle location of \c from
42 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
45 case 0: m
.x
= from
; break;
46 case 1: m
.y
= from
; break;
47 case 2: m
.z
= from
; break;
48 case 3: m
.w
= from
; break;
49 default: assert(!"Should not get here.");
52 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
56 ir_assignment::set_lhs(ir_rvalue
*lhs
)
59 bool swizzled
= false;
62 ir_swizzle
*swiz
= lhs
->as_swizzle();
67 unsigned write_mask
= 0;
68 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
70 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
74 case 0: c
= swiz
->mask
.x
; break;
75 case 1: c
= swiz
->mask
.y
; break;
76 case 2: c
= swiz
->mask
.z
; break;
77 case 3: c
= swiz
->mask
.w
; break;
78 default: assert(!"Should not get here.");
81 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
82 update_rhs_swizzle(rhs_swiz
, i
, c
);
85 this->write_mask
= write_mask
;
88 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
93 /* Now, RHS channels line up with the LHS writemask. Collapse it
94 * to just the channels that will be written.
96 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
98 for (int i
= 0; i
< 4; i
++) {
99 if (write_mask
& (1 << i
))
100 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
102 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
105 assert((lhs
== NULL
) || lhs
->as_dereference());
107 this->lhs
= (ir_dereference
*) lhs
;
111 ir_assignment::whole_variable_written()
113 ir_variable
*v
= this->lhs
->whole_variable_referenced();
118 if (v
->type
->is_scalar())
121 if (v
->type
->is_vector()) {
122 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
124 if (mask
!= this->write_mask
)
128 /* Either all the vector components are assigned or the variable is some
129 * composite type (and the whole thing is assigned.
134 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
135 ir_rvalue
*condition
, unsigned write_mask
)
137 this->ir_type
= ir_type_assignment
;
138 this->condition
= condition
;
141 this->write_mask
= write_mask
;
143 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
144 int lhs_components
= 0;
145 for (int i
= 0; i
< 4; i
++) {
146 if (write_mask
& (1 << i
))
150 assert(lhs_components
== this->rhs
->type
->vector_elements
);
154 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
155 ir_rvalue
*condition
)
157 this->ir_type
= ir_type_assignment
;
158 this->condition
= condition
;
161 /* If the RHS is a vector type, assume that all components of the vector
162 * type are being written to the LHS. The write mask comes from the RHS
163 * because we can have a case where the LHS is a vec4 and the RHS is a
164 * vec3. In that case, the assignment is:
166 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
168 if (rhs
->type
->is_vector())
169 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
170 else if (rhs
->type
->is_scalar())
171 this->write_mask
= 1;
173 this->write_mask
= 0;
179 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
180 ir_rvalue
*op0
, ir_rvalue
*op1
)
182 this->ir_type
= ir_type_expression
;
184 this->operation
= ir_expression_operation(op
);
185 this->operands
[0] = op0
;
186 this->operands
[1] = op1
;
190 ir_expression::get_num_operands(ir_expression_operation op
)
192 assert(op
<= ir_last_opcode
);
194 if (op
<= ir_last_unop
)
197 if (op
<= ir_last_binop
)
201 static const char *const operator_strs
[] = {
259 const char *ir_expression::operator_string(ir_expression_operation op
)
261 assert((unsigned int) op
< Elements(operator_strs
));
262 assert(Elements(operator_strs
) == (ir_binop_pow
+ 1));
263 return operator_strs
[op
];
266 const char *ir_expression::operator_string()
268 return operator_string(this->operation
);
271 ir_expression_operation
272 ir_expression::get_operator(const char *str
)
274 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
275 for (int op
= 0; op
< operator_count
; op
++) {
276 if (strcmp(str
, operator_strs
[op
]) == 0)
277 return (ir_expression_operation
) op
;
279 return (ir_expression_operation
) -1;
282 ir_constant::ir_constant()
284 this->ir_type
= ir_type_constant
;
287 ir_constant::ir_constant(const struct glsl_type
*type
,
288 const ir_constant_data
*data
)
290 assert((type
->base_type
>= GLSL_TYPE_UINT
)
291 && (type
->base_type
<= GLSL_TYPE_BOOL
));
293 this->ir_type
= ir_type_constant
;
295 memcpy(& this->value
, data
, sizeof(this->value
));
298 ir_constant::ir_constant(float f
)
300 this->ir_type
= ir_type_constant
;
301 this->type
= glsl_type::float_type
;
302 this->value
.f
[0] = f
;
303 for (int i
= 1; i
< 16; i
++) {
304 this->value
.f
[i
] = 0;
308 ir_constant::ir_constant(unsigned int u
)
310 this->ir_type
= ir_type_constant
;
311 this->type
= glsl_type::uint_type
;
312 this->value
.u
[0] = u
;
313 for (int i
= 1; i
< 16; i
++) {
314 this->value
.u
[i
] = 0;
318 ir_constant::ir_constant(int i
)
320 this->ir_type
= ir_type_constant
;
321 this->type
= glsl_type::int_type
;
322 this->value
.i
[0] = i
;
323 for (int i
= 1; i
< 16; i
++) {
324 this->value
.i
[i
] = 0;
328 ir_constant::ir_constant(bool b
)
330 this->ir_type
= ir_type_constant
;
331 this->type
= glsl_type::bool_type
;
332 this->value
.b
[0] = b
;
333 for (int i
= 1; i
< 16; i
++) {
334 this->value
.b
[i
] = false;
338 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
340 this->ir_type
= ir_type_constant
;
341 this->type
= c
->type
->get_base_type();
343 switch (this->type
->base_type
) {
344 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
345 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
346 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
347 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
348 default: assert(!"Should not get here."); break;
352 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
354 this->ir_type
= ir_type_constant
;
357 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
358 || type
->is_record() || type
->is_array());
360 if (type
->is_array()) {
361 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
363 foreach_list(node
, value_list
) {
364 ir_constant
*value
= (ir_constant
*) node
;
365 assert(value
->as_constant() != NULL
);
367 this->array_elements
[i
++] = value
;
372 /* If the constant is a record, the types of each of the entries in
373 * value_list must be a 1-for-1 match with the structure components. Each
374 * entry must also be a constant. Just move the nodes from the value_list
375 * to the list in the ir_constant.
377 /* FINISHME: Should there be some type checking and / or assertions here? */
378 /* FINISHME: Should the new constant take ownership of the nodes from
379 * FINISHME: value_list, or should it make copies?
381 if (type
->is_record()) {
382 value_list
->move_nodes_to(& this->components
);
386 for (unsigned i
= 0; i
< 16; i
++) {
387 this->value
.u
[i
] = 0;
390 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
392 /* Constructors with exactly one scalar argument are special for vectors
393 * and matrices. For vectors, the scalar value is replicated to fill all
394 * the components. For matrices, the scalar fills the components of the
395 * diagonal while the rest is filled with 0.
397 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
398 if (type
->is_matrix()) {
399 /* Matrix - fill diagonal (rest is already set to 0) */
400 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
401 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
402 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
404 /* Vector or scalar - fill all components */
405 switch (type
->base_type
) {
408 for (unsigned i
= 0; i
< type
->components(); i
++)
409 this->value
.u
[i
] = value
->value
.u
[0];
411 case GLSL_TYPE_FLOAT
:
412 for (unsigned i
= 0; i
< type
->components(); i
++)
413 this->value
.f
[i
] = value
->value
.f
[0];
416 for (unsigned i
= 0; i
< type
->components(); i
++)
417 this->value
.b
[i
] = value
->value
.b
[0];
420 assert(!"Should not get here.");
427 if (type
->is_matrix() && value
->type
->is_matrix()) {
428 assert(value
->next
->is_tail_sentinel());
430 /* From section 5.4.2 of the GLSL 1.20 spec:
431 * "If a matrix is constructed from a matrix, then each component
432 * (column i, row j) in the result that has a corresponding component
433 * (column i, row j) in the argument will be initialized from there."
435 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
436 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
437 for (unsigned i
= 0; i
< cols
; i
++) {
438 for (unsigned j
= 0; j
< rows
; j
++) {
439 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
440 const unsigned dst
= i
* type
->vector_elements
+ j
;
441 this->value
.f
[dst
] = value
->value
.f
[src
];
445 /* "All other components will be initialized to the identity matrix." */
446 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
447 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
452 /* Use each component from each entry in the value_list to initialize one
453 * component of the constant being constructed.
455 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
456 assert(value
->as_constant() != NULL
);
457 assert(!value
->is_tail_sentinel());
459 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
460 switch (type
->base_type
) {
462 this->value
.u
[i
] = value
->get_uint_component(j
);
465 this->value
.i
[i
] = value
->get_int_component(j
);
467 case GLSL_TYPE_FLOAT
:
468 this->value
.f
[i
] = value
->get_float_component(j
);
471 this->value
.b
[i
] = value
->get_bool_component(j
);
474 /* FINISHME: What to do? Exceptions are not the answer.
480 if (i
>= type
->components())
484 value
= (ir_constant
*) value
->next
;
489 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
491 assert(type
->is_numeric() || type
->is_boolean());
493 ir_constant
*c
= new(mem_ctx
) ir_constant
;
495 memset(&c
->value
, 0, sizeof(c
->value
));
501 ir_constant::get_bool_component(unsigned i
) const
503 switch (this->type
->base_type
) {
504 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
505 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
506 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
507 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
508 default: assert(!"Should not get here."); break;
511 /* Must return something to make the compiler happy. This is clearly an
518 ir_constant::get_float_component(unsigned i
) const
520 switch (this->type
->base_type
) {
521 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
522 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
523 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
524 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
525 default: assert(!"Should not get here."); break;
528 /* Must return something to make the compiler happy. This is clearly an
535 ir_constant::get_int_component(unsigned i
) const
537 switch (this->type
->base_type
) {
538 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
539 case GLSL_TYPE_INT
: return this->value
.i
[i
];
540 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
541 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
542 default: assert(!"Should not get here."); break;
545 /* Must return something to make the compiler happy. This is clearly an
552 ir_constant::get_uint_component(unsigned i
) const
554 switch (this->type
->base_type
) {
555 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
556 case GLSL_TYPE_INT
: return this->value
.i
[i
];
557 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
558 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
559 default: assert(!"Should not get here."); break;
562 /* Must return something to make the compiler happy. This is clearly an
569 ir_constant::get_array_element(unsigned i
) const
571 assert(this->type
->is_array());
573 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
575 * "Behavior is undefined if a shader subscripts an array with an index
576 * less than 0 or greater than or equal to the size the array was
579 * Most out-of-bounds accesses are removed before things could get this far.
580 * There are cases where non-constant array index values can get constant
585 else if (i
>= this->type
->length
)
586 i
= this->type
->length
- 1;
588 return array_elements
[i
];
592 ir_constant::get_record_field(const char *name
)
594 int idx
= this->type
->field_index(name
);
599 if (this->components
.is_empty())
602 exec_node
*node
= this->components
.head
;
603 for (int i
= 0; i
< idx
; i
++) {
606 /* If the end of the list is encountered before the element matching the
607 * requested field is found, return NULL.
609 if (node
->is_tail_sentinel())
613 return (ir_constant
*) node
;
618 ir_constant::has_value(const ir_constant
*c
) const
620 if (this->type
!= c
->type
)
623 if (this->type
->is_array()) {
624 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
625 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
631 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
632 const exec_node
*a_node
= this->components
.head
;
633 const exec_node
*b_node
= c
->components
.head
;
635 while (!a_node
->is_tail_sentinel()) {
636 assert(!b_node
->is_tail_sentinel());
638 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
639 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
641 if (!a_field
->has_value(b_field
))
644 a_node
= a_node
->next
;
645 b_node
= b_node
->next
;
651 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
652 switch (this->type
->base_type
) {
654 if (this->value
.u
[i
] != c
->value
.u
[i
])
658 if (this->value
.i
[i
] != c
->value
.i
[i
])
661 case GLSL_TYPE_FLOAT
:
662 if (this->value
.f
[i
] != c
->value
.f
[i
])
666 if (this->value
.b
[i
] != c
->value
.b
[i
])
670 assert(!"Should not get here.");
679 ir_constant::is_zero() const
681 if (!this->type
->is_scalar() && !this->type
->is_vector())
684 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
685 switch (this->type
->base_type
) {
686 case GLSL_TYPE_FLOAT
:
687 if (this->value
.f
[c
] != 0.0)
691 if (this->value
.i
[c
] != 0)
695 if (this->value
.u
[c
] != 0)
699 if (this->value
.b
[c
] != false)
703 /* The only other base types are structures, arrays, and samplers.
704 * Samplers cannot be constants, and the others should have been
705 * filtered out above.
707 assert(!"Should not get here.");
716 ir_constant::is_one() const
718 if (!this->type
->is_scalar() && !this->type
->is_vector())
721 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
722 switch (this->type
->base_type
) {
723 case GLSL_TYPE_FLOAT
:
724 if (this->value
.f
[c
] != 1.0)
728 if (this->value
.i
[c
] != 1)
732 if (this->value
.u
[c
] != 1)
736 if (this->value
.b
[c
] != true)
740 /* The only other base types are structures, arrays, and samplers.
741 * Samplers cannot be constants, and the others should have been
742 * filtered out above.
744 assert(!"Should not get here.");
754 this->ir_type
= ir_type_loop
;
755 this->cmp
= ir_unop_neg
;
758 this->increment
= NULL
;
759 this->counter
= NULL
;
763 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
765 this->ir_type
= ir_type_dereference_variable
;
767 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
771 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
772 ir_rvalue
*array_index
)
774 this->ir_type
= ir_type_dereference_array
;
775 this->array_index
= array_index
;
776 this->set_array(value
);
780 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
781 ir_rvalue
*array_index
)
783 void *ctx
= talloc_parent(var
);
785 this->ir_type
= ir_type_dereference_array
;
786 this->array_index
= array_index
;
787 this->set_array(new(ctx
) ir_dereference_variable(var
));
792 ir_dereference_array::set_array(ir_rvalue
*value
)
795 this->type
= glsl_type::error_type
;
797 if (this->array
!= NULL
) {
798 const glsl_type
*const vt
= this->array
->type
;
800 if (vt
->is_array()) {
801 type
= vt
->element_type();
802 } else if (vt
->is_matrix()) {
803 type
= vt
->column_type();
804 } else if (vt
->is_vector()) {
805 type
= vt
->get_base_type();
811 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
814 this->ir_type
= ir_type_dereference_record
;
815 this->record
= value
;
816 this->field
= talloc_strdup(this, field
);
817 this->type
= (this->record
!= NULL
)
818 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
822 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
825 void *ctx
= talloc_parent(var
);
827 this->ir_type
= ir_type_dereference_record
;
828 this->record
= new(ctx
) ir_dereference_variable(var
);
829 this->field
= talloc_strdup(this, field
);
830 this->type
= (this->record
!= NULL
)
831 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
834 bool type_contains_sampler(const glsl_type
*type
)
836 if (type
->is_array()) {
837 return type_contains_sampler(type
->fields
.array
);
838 } else if (type
->is_record()) {
839 for (unsigned int i
= 0; i
< type
->length
; i
++) {
840 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
845 return type
->is_sampler();
850 ir_dereference::is_lvalue()
852 ir_variable
*var
= this->variable_referenced();
854 /* Every l-value derference chain eventually ends in a variable.
856 if ((var
== NULL
) || var
->read_only
)
859 if (this->type
->is_array() && !var
->array_lvalue
)
862 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
864 * "Samplers cannot be treated as l-values; hence cannot be used
865 * as out or inout function parameters, nor can they be
868 if (type_contains_sampler(this->type
))
875 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
877 const char *ir_texture::opcode_string()
879 assert((unsigned int) op
<=
880 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
881 return tex_opcode_strs
[op
];
885 ir_texture::get_opcode(const char *str
)
887 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
888 for (int op
= 0; op
< count
; op
++) {
889 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
890 return (ir_texture_opcode
) op
;
892 return (ir_texture_opcode
) -1;
897 ir_texture::set_sampler(ir_dereference
*sampler
)
899 assert(sampler
!= NULL
);
900 this->sampler
= sampler
;
902 switch (sampler
->type
->sampler_type
) {
903 case GLSL_TYPE_FLOAT
:
904 this->type
= glsl_type::vec4_type
;
907 this->type
= glsl_type::ivec4_type
;
910 this->type
= glsl_type::uvec4_type
;
917 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
919 assert((count
>= 1) && (count
<= 4));
921 memset(&this->mask
, 0, sizeof(this->mask
));
922 this->mask
.num_components
= count
;
924 unsigned dup_mask
= 0;
927 assert(comp
[3] <= 3);
928 dup_mask
|= (1U << comp
[3])
929 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
930 this->mask
.w
= comp
[3];
933 assert(comp
[2] <= 3);
934 dup_mask
|= (1U << comp
[2])
935 & ((1U << comp
[0]) | (1U << comp
[1]));
936 this->mask
.z
= comp
[2];
939 assert(comp
[1] <= 3);
940 dup_mask
|= (1U << comp
[1])
942 this->mask
.y
= comp
[1];
945 assert(comp
[0] <= 3);
946 this->mask
.x
= comp
[0];
949 this->mask
.has_duplicates
= dup_mask
!= 0;
951 /* Based on the number of elements in the swizzle and the base type
952 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
953 * generate the type of the resulting value.
955 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
958 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
959 unsigned w
, unsigned count
)
962 const unsigned components
[4] = { x
, y
, z
, w
};
963 this->ir_type
= ir_type_swizzle
;
964 this->init_mask(components
, count
);
967 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
971 this->ir_type
= ir_type_swizzle
;
972 this->init_mask(comp
, count
);
975 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
977 this->ir_type
= ir_type_swizzle
;
980 this->type
= glsl_type::get_instance(val
->type
->base_type
,
981 mask
.num_components
, 1);
990 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
992 void *ctx
= talloc_parent(val
);
994 /* For each possible swizzle character, this table encodes the value in
995 * \c idx_map that represents the 0th element of the vector. For invalid
996 * swizzle characters (e.g., 'k'), a special value is used that will allow
997 * detection of errors.
999 static const unsigned char base_idx
[26] = {
1000 /* a b c d e f g h i j k l m */
1001 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1002 /* n o p q r s t u v w x y z */
1003 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1006 /* Each valid swizzle character has an entry in the previous table. This
1007 * table encodes the base index encoded in the previous table plus the actual
1008 * index of the swizzle character. When processing swizzles, the first
1009 * character in the string is indexed in the previous table. Each character
1010 * in the string is indexed in this table, and the value found there has the
1011 * value form the first table subtracted. The result must be on the range
1014 * For example, the string "wzyx" will get X from the first table. Each of
1015 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1016 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1018 * The string "wzrg" will get X from the first table. Each of the characters
1019 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1020 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1021 * [0,3], the error is detected.
1023 static const unsigned char idx_map
[26] = {
1024 /* a b c d e f g h i j k l m */
1025 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1026 /* n o p q r s t u v w x y z */
1027 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1030 int swiz_idx
[4] = { 0, 0, 0, 0 };
1034 /* Validate the first character in the swizzle string and look up the base
1035 * index value as described above.
1037 if ((str
[0] < 'a') || (str
[0] > 'z'))
1040 const unsigned base
= base_idx
[str
[0] - 'a'];
1043 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1044 /* Validate the next character, and, as described above, convert it to a
1047 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1050 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1051 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1058 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1068 ir_swizzle::variable_referenced()
1070 return this->val
->variable_referenced();
1074 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1075 ir_variable_mode mode
)
1076 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1077 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1079 this->ir_type
= ir_type_variable
;
1081 this->name
= talloc_strdup(this, name
);
1082 this->explicit_location
= false;
1083 this->location
= -1;
1084 this->warn_extension
= NULL
;
1085 this->constant_value
= NULL
;
1086 this->origin_upper_left
= false;
1087 this->pixel_center_integer
= false;
1089 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1090 this->read_only
= true;
1095 ir_variable::interpolation_string() const
1097 switch (this->interpolation
) {
1098 case ir_var_smooth
: return "smooth";
1099 case ir_var_flat
: return "flat";
1100 case ir_var_noperspective
: return "noperspective";
1103 assert(!"Should not get here.");
1109 ir_variable::component_slots() const
1111 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1112 return this->type
->component_slots();
1116 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1117 : return_type(return_type
), is_defined(false), _function(NULL
)
1119 this->ir_type
= ir_type_function_signature
;
1120 this->is_builtin
= false;
1125 ir_function_signature::qualifiers_match(exec_list
*params
)
1127 exec_list_iterator iter_a
= parameters
.iterator();
1128 exec_list_iterator iter_b
= params
->iterator();
1130 /* check that the qualifiers match. */
1131 while (iter_a
.has_next()) {
1132 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1133 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1135 if (a
->read_only
!= b
->read_only
||
1136 a
->mode
!= b
->mode
||
1137 a
->interpolation
!= b
->interpolation
||
1138 a
->centroid
!= b
->centroid
) {
1140 /* parameter a's qualifiers don't match */
1152 ir_function_signature::replace_parameters(exec_list
*new_params
)
1154 /* Destroy all of the previous parameter information. If the previous
1155 * parameter information comes from the function prototype, it may either
1156 * specify incorrect parameter names or not have names at all.
1158 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1159 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1164 new_params
->move_nodes_to(¶meters
);
1168 ir_function::ir_function(const char *name
)
1170 this->ir_type
= ir_type_function
;
1171 this->name
= talloc_strdup(this, name
);
1176 ir_function::has_user_signature()
1178 foreach_list(n
, &this->signatures
) {
1179 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1180 if (!sig
->is_builtin
)
1188 ir_call::get_error_instruction(void *ctx
)
1190 ir_call
*call
= new(ctx
) ir_call
;
1192 call
->type
= glsl_type::error_type
;
1197 ir_call::set_callee(ir_function_signature
*sig
)
1199 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1205 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1207 foreach_iter(exec_list_iterator
, iter
, *list
) {
1208 ((ir_instruction
*)iter
.get())->accept(visitor
);
1214 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1216 ir_variable
*var
= ir
->as_variable();
1217 ir_constant
*constant
= ir
->as_constant();
1218 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1219 steal_memory(var
->constant_value
, ir
);
1221 /* The components of aggregate constants are not visited by the normal
1222 * visitor, so steal their values by hand.
1224 if (constant
!= NULL
) {
1225 if (constant
->type
->is_record()) {
1226 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1227 ir_constant
*field
= (ir_constant
*)iter
.get();
1228 steal_memory(field
, ir
);
1230 } else if (constant
->type
->is_array()) {
1231 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1232 steal_memory(constant
->array_elements
[i
], ir
);
1237 talloc_steal(new_ctx
, ir
);
1242 reparent_ir(exec_list
*list
, void *mem_ctx
)
1244 foreach_list(node
, list
) {
1245 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);