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
45 * Modify the swizzle make to move one component to another
47 * \param m IR swizzle to be modified
48 * \param from Component in the RHS that is to be swizzled
49 * \param to Desired swizzle location of \c from
52 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
55 case 0: m
.x
= from
; break;
56 case 1: m
.y
= from
; break;
57 case 2: m
.z
= from
; break;
58 case 3: m
.w
= from
; break;
59 default: assert(!"Should not get here.");
62 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
66 ir_assignment::set_lhs(ir_rvalue
*lhs
)
69 bool swizzled
= false;
72 ir_swizzle
*swiz
= lhs
->as_swizzle();
77 unsigned write_mask
= 0;
78 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
80 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
84 case 0: c
= swiz
->mask
.x
; break;
85 case 1: c
= swiz
->mask
.y
; break;
86 case 2: c
= swiz
->mask
.z
; break;
87 case 3: c
= swiz
->mask
.w
; break;
88 default: assert(!"Should not get here.");
91 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
92 update_rhs_swizzle(rhs_swiz
, i
, c
);
95 this->write_mask
= write_mask
;
98 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
103 /* Now, RHS channels line up with the LHS writemask. Collapse it
104 * to just the channels that will be written.
106 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
108 for (int i
= 0; i
< 4; i
++) {
109 if (write_mask
& (1 << i
))
110 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
112 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
115 assert((lhs
== NULL
) || lhs
->as_dereference());
117 this->lhs
= (ir_dereference
*) lhs
;
121 ir_assignment::whole_variable_written()
123 ir_variable
*v
= this->lhs
->whole_variable_referenced();
128 if (v
->type
->is_scalar())
131 if (v
->type
->is_vector()) {
132 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
134 if (mask
!= this->write_mask
)
138 /* Either all the vector components are assigned or the variable is some
139 * composite type (and the whole thing is assigned.
144 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
145 ir_rvalue
*condition
, unsigned write_mask
)
147 this->ir_type
= ir_type_assignment
;
148 this->condition
= condition
;
151 this->write_mask
= write_mask
;
153 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
154 int lhs_components
= 0;
155 for (int i
= 0; i
< 4; i
++) {
156 if (write_mask
& (1 << i
))
160 assert(lhs_components
== this->rhs
->type
->vector_elements
);
164 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
165 ir_rvalue
*condition
)
167 this->ir_type
= ir_type_assignment
;
168 this->condition
= condition
;
171 /* If the RHS is a vector type, assume that all components of the vector
172 * type are being written to the LHS. The write mask comes from the RHS
173 * because we can have a case where the LHS is a vec4 and the RHS is a
174 * vec3. In that case, the assignment is:
176 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
178 if (rhs
->type
->is_vector())
179 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
180 else if (rhs
->type
->is_scalar())
181 this->write_mask
= 1;
183 this->write_mask
= 0;
189 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
190 ir_rvalue
*op0
, ir_rvalue
*op1
)
192 this->ir_type
= ir_type_expression
;
194 this->operation
= ir_expression_operation(op
);
195 this->operands
[0] = op0
;
196 this->operands
[1] = op1
;
200 ir_expression::get_num_operands(ir_expression_operation op
)
202 assert(op
<= ir_last_opcode
);
204 if (op
<= ir_last_unop
)
207 if (op
<= ir_last_binop
)
214 static const char *const operator_strs
[] = {
274 const char *ir_expression::operator_string(ir_expression_operation op
)
276 assert((unsigned int) op
< Elements(operator_strs
));
277 assert(Elements(operator_strs
) == (ir_binop_pow
+ 1));
278 return operator_strs
[op
];
281 const char *ir_expression::operator_string()
283 return operator_string(this->operation
);
286 ir_expression_operation
287 ir_expression::get_operator(const char *str
)
289 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
290 for (int op
= 0; op
< operator_count
; op
++) {
291 if (strcmp(str
, operator_strs
[op
]) == 0)
292 return (ir_expression_operation
) op
;
294 return (ir_expression_operation
) -1;
297 ir_constant::ir_constant()
299 this->ir_type
= ir_type_constant
;
302 ir_constant::ir_constant(const struct glsl_type
*type
,
303 const ir_constant_data
*data
)
305 assert((type
->base_type
>= GLSL_TYPE_UINT
)
306 && (type
->base_type
<= GLSL_TYPE_BOOL
));
308 this->ir_type
= ir_type_constant
;
310 memcpy(& this->value
, data
, sizeof(this->value
));
313 ir_constant::ir_constant(float f
)
315 this->ir_type
= ir_type_constant
;
316 this->type
= glsl_type::float_type
;
317 this->value
.f
[0] = f
;
318 for (int i
= 1; i
< 16; i
++) {
319 this->value
.f
[i
] = 0;
323 ir_constant::ir_constant(unsigned int u
)
325 this->ir_type
= ir_type_constant
;
326 this->type
= glsl_type::uint_type
;
327 this->value
.u
[0] = u
;
328 for (int i
= 1; i
< 16; i
++) {
329 this->value
.u
[i
] = 0;
333 ir_constant::ir_constant(int i
)
335 this->ir_type
= ir_type_constant
;
336 this->type
= glsl_type::int_type
;
337 this->value
.i
[0] = i
;
338 for (int i
= 1; i
< 16; i
++) {
339 this->value
.i
[i
] = 0;
343 ir_constant::ir_constant(bool b
)
345 this->ir_type
= ir_type_constant
;
346 this->type
= glsl_type::bool_type
;
347 this->value
.b
[0] = b
;
348 for (int i
= 1; i
< 16; i
++) {
349 this->value
.b
[i
] = false;
353 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
355 this->ir_type
= ir_type_constant
;
356 this->type
= c
->type
->get_base_type();
358 switch (this->type
->base_type
) {
359 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
360 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
361 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
362 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
363 default: assert(!"Should not get here."); break;
367 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
369 this->ir_type
= ir_type_constant
;
372 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
373 || type
->is_record() || type
->is_array());
375 if (type
->is_array()) {
376 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
378 foreach_list(node
, value_list
) {
379 ir_constant
*value
= (ir_constant
*) node
;
380 assert(value
->as_constant() != NULL
);
382 this->array_elements
[i
++] = value
;
387 /* If the constant is a record, the types of each of the entries in
388 * value_list must be a 1-for-1 match with the structure components. Each
389 * entry must also be a constant. Just move the nodes from the value_list
390 * to the list in the ir_constant.
392 /* FINISHME: Should there be some type checking and / or assertions here? */
393 /* FINISHME: Should the new constant take ownership of the nodes from
394 * FINISHME: value_list, or should it make copies?
396 if (type
->is_record()) {
397 value_list
->move_nodes_to(& this->components
);
401 for (unsigned i
= 0; i
< 16; i
++) {
402 this->value
.u
[i
] = 0;
405 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
407 /* Constructors with exactly one scalar argument are special for vectors
408 * and matrices. For vectors, the scalar value is replicated to fill all
409 * the components. For matrices, the scalar fills the components of the
410 * diagonal while the rest is filled with 0.
412 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
413 if (type
->is_matrix()) {
414 /* Matrix - fill diagonal (rest is already set to 0) */
415 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
416 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
417 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
419 /* Vector or scalar - fill all components */
420 switch (type
->base_type
) {
423 for (unsigned i
= 0; i
< type
->components(); i
++)
424 this->value
.u
[i
] = value
->value
.u
[0];
426 case GLSL_TYPE_FLOAT
:
427 for (unsigned i
= 0; i
< type
->components(); i
++)
428 this->value
.f
[i
] = value
->value
.f
[0];
431 for (unsigned i
= 0; i
< type
->components(); i
++)
432 this->value
.b
[i
] = value
->value
.b
[0];
435 assert(!"Should not get here.");
442 if (type
->is_matrix() && value
->type
->is_matrix()) {
443 assert(value
->next
->is_tail_sentinel());
445 /* From section 5.4.2 of the GLSL 1.20 spec:
446 * "If a matrix is constructed from a matrix, then each component
447 * (column i, row j) in the result that has a corresponding component
448 * (column i, row j) in the argument will be initialized from there."
450 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
451 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
452 for (unsigned i
= 0; i
< cols
; i
++) {
453 for (unsigned j
= 0; j
< rows
; j
++) {
454 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
455 const unsigned dst
= i
* type
->vector_elements
+ j
;
456 this->value
.f
[dst
] = value
->value
.f
[src
];
460 /* "All other components will be initialized to the identity matrix." */
461 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
462 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
467 /* Use each component from each entry in the value_list to initialize one
468 * component of the constant being constructed.
470 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
471 assert(value
->as_constant() != NULL
);
472 assert(!value
->is_tail_sentinel());
474 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
475 switch (type
->base_type
) {
477 this->value
.u
[i
] = value
->get_uint_component(j
);
480 this->value
.i
[i
] = value
->get_int_component(j
);
482 case GLSL_TYPE_FLOAT
:
483 this->value
.f
[i
] = value
->get_float_component(j
);
486 this->value
.b
[i
] = value
->get_bool_component(j
);
489 /* FINISHME: What to do? Exceptions are not the answer.
495 if (i
>= type
->components())
499 value
= (ir_constant
*) value
->next
;
504 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
506 assert(type
->is_numeric() || type
->is_boolean());
508 ir_constant
*c
= new(mem_ctx
) ir_constant
;
510 memset(&c
->value
, 0, sizeof(c
->value
));
516 ir_constant::get_bool_component(unsigned i
) const
518 switch (this->type
->base_type
) {
519 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
520 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
521 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
522 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
523 default: assert(!"Should not get here."); break;
526 /* Must return something to make the compiler happy. This is clearly an
533 ir_constant::get_float_component(unsigned i
) const
535 switch (this->type
->base_type
) {
536 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
537 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
538 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
539 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
540 default: assert(!"Should not get here."); break;
543 /* Must return something to make the compiler happy. This is clearly an
550 ir_constant::get_int_component(unsigned i
) const
552 switch (this->type
->base_type
) {
553 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
554 case GLSL_TYPE_INT
: return this->value
.i
[i
];
555 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
556 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
557 default: assert(!"Should not get here."); break;
560 /* Must return something to make the compiler happy. This is clearly an
567 ir_constant::get_uint_component(unsigned i
) const
569 switch (this->type
->base_type
) {
570 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
571 case GLSL_TYPE_INT
: return this->value
.i
[i
];
572 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
573 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
574 default: assert(!"Should not get here."); break;
577 /* Must return something to make the compiler happy. This is clearly an
584 ir_constant::get_array_element(unsigned i
) const
586 assert(this->type
->is_array());
588 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
590 * "Behavior is undefined if a shader subscripts an array with an index
591 * less than 0 or greater than or equal to the size the array was
594 * Most out-of-bounds accesses are removed before things could get this far.
595 * There are cases where non-constant array index values can get constant
600 else if (i
>= this->type
->length
)
601 i
= this->type
->length
- 1;
603 return array_elements
[i
];
607 ir_constant::get_record_field(const char *name
)
609 int idx
= this->type
->field_index(name
);
614 if (this->components
.is_empty())
617 exec_node
*node
= this->components
.head
;
618 for (int i
= 0; i
< idx
; i
++) {
621 /* If the end of the list is encountered before the element matching the
622 * requested field is found, return NULL.
624 if (node
->is_tail_sentinel())
628 return (ir_constant
*) node
;
633 ir_constant::has_value(const ir_constant
*c
) const
635 if (this->type
!= c
->type
)
638 if (this->type
->is_array()) {
639 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
640 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
646 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
647 const exec_node
*a_node
= this->components
.head
;
648 const exec_node
*b_node
= c
->components
.head
;
650 while (!a_node
->is_tail_sentinel()) {
651 assert(!b_node
->is_tail_sentinel());
653 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
654 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
656 if (!a_field
->has_value(b_field
))
659 a_node
= a_node
->next
;
660 b_node
= b_node
->next
;
666 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
667 switch (this->type
->base_type
) {
669 if (this->value
.u
[i
] != c
->value
.u
[i
])
673 if (this->value
.i
[i
] != c
->value
.i
[i
])
676 case GLSL_TYPE_FLOAT
:
677 if (this->value
.f
[i
] != c
->value
.f
[i
])
681 if (this->value
.b
[i
] != c
->value
.b
[i
])
685 assert(!"Should not get here.");
694 ir_constant::is_zero() const
696 if (!this->type
->is_scalar() && !this->type
->is_vector())
699 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
700 switch (this->type
->base_type
) {
701 case GLSL_TYPE_FLOAT
:
702 if (this->value
.f
[c
] != 0.0)
706 if (this->value
.i
[c
] != 0)
710 if (this->value
.u
[c
] != 0)
714 if (this->value
.b
[c
] != false)
718 /* The only other base types are structures, arrays, and samplers.
719 * Samplers cannot be constants, and the others should have been
720 * filtered out above.
722 assert(!"Should not get here.");
731 ir_constant::is_one() const
733 if (!this->type
->is_scalar() && !this->type
->is_vector())
736 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
737 switch (this->type
->base_type
) {
738 case GLSL_TYPE_FLOAT
:
739 if (this->value
.f
[c
] != 1.0)
743 if (this->value
.i
[c
] != 1)
747 if (this->value
.u
[c
] != 1)
751 if (this->value
.b
[c
] != true)
755 /* The only other base types are structures, arrays, and samplers.
756 * Samplers cannot be constants, and the others should have been
757 * filtered out above.
759 assert(!"Should not get here.");
769 this->ir_type
= ir_type_loop
;
770 this->cmp
= ir_unop_neg
;
773 this->increment
= NULL
;
774 this->counter
= NULL
;
778 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
780 this->ir_type
= ir_type_dereference_variable
;
782 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
786 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
787 ir_rvalue
*array_index
)
789 this->ir_type
= ir_type_dereference_array
;
790 this->array_index
= array_index
;
791 this->set_array(value
);
795 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
796 ir_rvalue
*array_index
)
798 void *ctx
= talloc_parent(var
);
800 this->ir_type
= ir_type_dereference_array
;
801 this->array_index
= array_index
;
802 this->set_array(new(ctx
) ir_dereference_variable(var
));
807 ir_dereference_array::set_array(ir_rvalue
*value
)
810 this->type
= glsl_type::error_type
;
812 if (this->array
!= NULL
) {
813 const glsl_type
*const vt
= this->array
->type
;
815 if (vt
->is_array()) {
816 type
= vt
->element_type();
817 } else if (vt
->is_matrix()) {
818 type
= vt
->column_type();
819 } else if (vt
->is_vector()) {
820 type
= vt
->get_base_type();
826 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
829 this->ir_type
= ir_type_dereference_record
;
830 this->record
= value
;
831 this->field
= talloc_strdup(this, field
);
832 this->type
= (this->record
!= NULL
)
833 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
837 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
840 void *ctx
= talloc_parent(var
);
842 this->ir_type
= ir_type_dereference_record
;
843 this->record
= new(ctx
) ir_dereference_variable(var
);
844 this->field
= talloc_strdup(this, field
);
845 this->type
= (this->record
!= NULL
)
846 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
849 bool type_contains_sampler(const glsl_type
*type
)
851 if (type
->is_array()) {
852 return type_contains_sampler(type
->fields
.array
);
853 } else if (type
->is_record()) {
854 for (unsigned int i
= 0; i
< type
->length
; i
++) {
855 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
860 return type
->is_sampler();
865 ir_dereference::is_lvalue()
867 ir_variable
*var
= this->variable_referenced();
869 /* Every l-value derference chain eventually ends in a variable.
871 if ((var
== NULL
) || var
->read_only
)
874 if (this->type
->is_array() && !var
->array_lvalue
)
877 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
879 * "Samplers cannot be treated as l-values; hence cannot be used
880 * as out or inout function parameters, nor can they be
883 if (type_contains_sampler(this->type
))
890 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
892 const char *ir_texture::opcode_string()
894 assert((unsigned int) op
<=
895 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
896 return tex_opcode_strs
[op
];
900 ir_texture::get_opcode(const char *str
)
902 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
903 for (int op
= 0; op
< count
; op
++) {
904 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
905 return (ir_texture_opcode
) op
;
907 return (ir_texture_opcode
) -1;
912 ir_texture::set_sampler(ir_dereference
*sampler
)
914 assert(sampler
!= NULL
);
915 this->sampler
= sampler
;
917 switch (sampler
->type
->sampler_type
) {
918 case GLSL_TYPE_FLOAT
:
919 this->type
= glsl_type::vec4_type
;
922 this->type
= glsl_type::ivec4_type
;
925 this->type
= glsl_type::uvec4_type
;
932 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
934 assert((count
>= 1) && (count
<= 4));
936 memset(&this->mask
, 0, sizeof(this->mask
));
937 this->mask
.num_components
= count
;
939 unsigned dup_mask
= 0;
942 assert(comp
[3] <= 3);
943 dup_mask
|= (1U << comp
[3])
944 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
945 this->mask
.w
= comp
[3];
948 assert(comp
[2] <= 3);
949 dup_mask
|= (1U << comp
[2])
950 & ((1U << comp
[0]) | (1U << comp
[1]));
951 this->mask
.z
= comp
[2];
954 assert(comp
[1] <= 3);
955 dup_mask
|= (1U << comp
[1])
957 this->mask
.y
= comp
[1];
960 assert(comp
[0] <= 3);
961 this->mask
.x
= comp
[0];
964 this->mask
.has_duplicates
= dup_mask
!= 0;
966 /* Based on the number of elements in the swizzle and the base type
967 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
968 * generate the type of the resulting value.
970 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
973 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
974 unsigned w
, unsigned count
)
977 const unsigned components
[4] = { x
, y
, z
, w
};
978 this->ir_type
= ir_type_swizzle
;
979 this->init_mask(components
, count
);
982 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
986 this->ir_type
= ir_type_swizzle
;
987 this->init_mask(comp
, count
);
990 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
992 this->ir_type
= ir_type_swizzle
;
995 this->type
= glsl_type::get_instance(val
->type
->base_type
,
996 mask
.num_components
, 1);
1005 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1007 void *ctx
= talloc_parent(val
);
1009 /* For each possible swizzle character, this table encodes the value in
1010 * \c idx_map that represents the 0th element of the vector. For invalid
1011 * swizzle characters (e.g., 'k'), a special value is used that will allow
1012 * detection of errors.
1014 static const unsigned char base_idx
[26] = {
1015 /* a b c d e f g h i j k l m */
1016 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1017 /* n o p q r s t u v w x y z */
1018 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1021 /* Each valid swizzle character has an entry in the previous table. This
1022 * table encodes the base index encoded in the previous table plus the actual
1023 * index of the swizzle character. When processing swizzles, the first
1024 * character in the string is indexed in the previous table. Each character
1025 * in the string is indexed in this table, and the value found there has the
1026 * value form the first table subtracted. The result must be on the range
1029 * For example, the string "wzyx" will get X from the first table. Each of
1030 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1031 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1033 * The string "wzrg" will get X from the first table. Each of the characters
1034 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1035 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1036 * [0,3], the error is detected.
1038 static const unsigned char idx_map
[26] = {
1039 /* a b c d e f g h i j k l m */
1040 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1041 /* n o p q r s t u v w x y z */
1042 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1045 int swiz_idx
[4] = { 0, 0, 0, 0 };
1049 /* Validate the first character in the swizzle string and look up the base
1050 * index value as described above.
1052 if ((str
[0] < 'a') || (str
[0] > 'z'))
1055 const unsigned base
= base_idx
[str
[0] - 'a'];
1058 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1059 /* Validate the next character, and, as described above, convert it to a
1062 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1065 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1066 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1073 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1083 ir_swizzle::variable_referenced()
1085 return this->val
->variable_referenced();
1089 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1090 ir_variable_mode mode
)
1091 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1092 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1094 this->ir_type
= ir_type_variable
;
1096 this->name
= talloc_strdup(this, name
);
1097 this->explicit_location
= false;
1098 this->location
= -1;
1099 this->warn_extension
= NULL
;
1100 this->constant_value
= NULL
;
1101 this->origin_upper_left
= false;
1102 this->pixel_center_integer
= false;
1104 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1105 this->read_only
= true;
1110 ir_variable::interpolation_string() const
1112 switch (this->interpolation
) {
1113 case ir_var_smooth
: return "smooth";
1114 case ir_var_flat
: return "flat";
1115 case ir_var_noperspective
: return "noperspective";
1118 assert(!"Should not get here.");
1124 ir_variable::component_slots() const
1126 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1127 return this->type
->component_slots();
1131 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1132 : return_type(return_type
), is_defined(false), _function(NULL
)
1134 this->ir_type
= ir_type_function_signature
;
1135 this->is_builtin
= false;
1140 ir_function_signature::qualifiers_match(exec_list
*params
)
1142 exec_list_iterator iter_a
= parameters
.iterator();
1143 exec_list_iterator iter_b
= params
->iterator();
1145 /* check that the qualifiers match. */
1146 while (iter_a
.has_next()) {
1147 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1148 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1150 if (a
->read_only
!= b
->read_only
||
1151 a
->mode
!= b
->mode
||
1152 a
->interpolation
!= b
->interpolation
||
1153 a
->centroid
!= b
->centroid
) {
1155 /* parameter a's qualifiers don't match */
1167 ir_function_signature::replace_parameters(exec_list
*new_params
)
1169 /* Destroy all of the previous parameter information. If the previous
1170 * parameter information comes from the function prototype, it may either
1171 * specify incorrect parameter names or not have names at all.
1173 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1174 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1179 new_params
->move_nodes_to(¶meters
);
1183 ir_function::ir_function(const char *name
)
1185 this->ir_type
= ir_type_function
;
1186 this->name
= talloc_strdup(this, name
);
1191 ir_function::has_user_signature()
1193 foreach_list(n
, &this->signatures
) {
1194 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1195 if (!sig
->is_builtin
)
1203 ir_call::get_error_instruction(void *ctx
)
1205 ir_call
*call
= new(ctx
) ir_call
;
1207 call
->type
= glsl_type::error_type
;
1212 ir_call::set_callee(ir_function_signature
*sig
)
1214 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1220 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1222 foreach_iter(exec_list_iterator
, iter
, *list
) {
1223 ((ir_instruction
*)iter
.get())->accept(visitor
);
1229 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1231 ir_variable
*var
= ir
->as_variable();
1232 ir_constant
*constant
= ir
->as_constant();
1233 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1234 steal_memory(var
->constant_value
, ir
);
1236 /* The components of aggregate constants are not visited by the normal
1237 * visitor, so steal their values by hand.
1239 if (constant
!= NULL
) {
1240 if (constant
->type
->is_record()) {
1241 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1242 ir_constant
*field
= (ir_constant
*)iter
.get();
1243 steal_memory(field
, ir
);
1245 } else if (constant
->type
->is_array()) {
1246 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1247 steal_memory(constant
->array_elements
[i
], ir
);
1252 talloc_steal(new_ctx
, ir
);
1257 reparent_ir(exec_list
*list
, void *mem_ctx
)
1259 foreach_list(node
, list
) {
1260 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);