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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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 /* Update ir_print_visitor.cpp when updating this list. */
193 const int num_operands
[] = {
194 1, /* ir_unop_bit_not */
195 1, /* ir_unop_logic_not */
198 1, /* ir_unop_sign */
201 1, /* ir_unop_sqrt */
204 1, /* ir_unop_exp2 */
205 1, /* ir_unop_log2 */
215 1, /* ir_unop_trunc */
216 1, /* ir_unop_ceil */
217 1, /* ir_unop_floor */
218 1, /* ir_unop_fract */
219 1, /* ir_unop_round_even */
224 1, /* ir_unop_dFdx */
225 1, /* ir_unop_dFdy */
227 1, /* ir_unop_noise */
229 2, /* ir_binop_add */
230 2, /* ir_binop_sub */
231 2, /* ir_binop_mul */
232 2, /* ir_binop_div */
233 2, /* ir_binop_mod */
235 2, /* ir_binop_less */
236 2, /* ir_binop_greater */
237 2, /* ir_binop_lequal */
238 2, /* ir_binop_gequal */
239 2, /* ir_binop_equal */
240 2, /* ir_binop_nequal */
241 2, /* ir_binop_all_equal */
242 2, /* ir_binop_any_nequal */
244 2, /* ir_binop_lshift */
245 2, /* ir_binop_rshift */
246 2, /* ir_binop_bit_and */
247 2, /* ir_binop_bit_xor */
248 2, /* ir_binop_bit_or */
250 2, /* ir_binop_logic_and */
251 2, /* ir_binop_logic_xor */
252 2, /* ir_binop_logic_or */
254 2, /* ir_binop_dot */
255 2, /* ir_binop_cross */
256 2, /* ir_binop_min */
257 2, /* ir_binop_max */
259 2, /* ir_binop_pow */
262 assert(sizeof(num_operands
) / sizeof(num_operands
[0]) == ir_binop_pow
+ 1);
264 return num_operands
[op
];
267 static const char *const operator_strs
[] = {
326 const char *ir_expression::operator_string(ir_expression_operation op
)
328 assert((unsigned int) op
< Elements(operator_strs
));
329 assert(Elements(operator_strs
) == (ir_binop_pow
+ 1));
330 return operator_strs
[op
];
333 const char *ir_expression::operator_string()
335 return operator_string(this->operation
);
338 ir_expression_operation
339 ir_expression::get_operator(const char *str
)
341 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
342 for (int op
= 0; op
< operator_count
; op
++) {
343 if (strcmp(str
, operator_strs
[op
]) == 0)
344 return (ir_expression_operation
) op
;
346 return (ir_expression_operation
) -1;
349 ir_constant::ir_constant()
351 this->ir_type
= ir_type_constant
;
354 ir_constant::ir_constant(const struct glsl_type
*type
,
355 const ir_constant_data
*data
)
357 assert((type
->base_type
>= GLSL_TYPE_UINT
)
358 && (type
->base_type
<= GLSL_TYPE_BOOL
));
360 this->ir_type
= ir_type_constant
;
362 memcpy(& this->value
, data
, sizeof(this->value
));
365 ir_constant::ir_constant(float f
)
367 this->ir_type
= ir_type_constant
;
368 this->type
= glsl_type::float_type
;
369 this->value
.f
[0] = f
;
370 for (int i
= 1; i
< 16; i
++) {
371 this->value
.f
[i
] = 0;
375 ir_constant::ir_constant(unsigned int u
)
377 this->ir_type
= ir_type_constant
;
378 this->type
= glsl_type::uint_type
;
379 this->value
.u
[0] = u
;
380 for (int i
= 1; i
< 16; i
++) {
381 this->value
.u
[i
] = 0;
385 ir_constant::ir_constant(int i
)
387 this->ir_type
= ir_type_constant
;
388 this->type
= glsl_type::int_type
;
389 this->value
.i
[0] = i
;
390 for (int i
= 1; i
< 16; i
++) {
391 this->value
.i
[i
] = 0;
395 ir_constant::ir_constant(bool b
)
397 this->ir_type
= ir_type_constant
;
398 this->type
= glsl_type::bool_type
;
399 this->value
.b
[0] = b
;
400 for (int i
= 1; i
< 16; i
++) {
401 this->value
.b
[i
] = false;
405 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
407 this->ir_type
= ir_type_constant
;
408 this->type
= c
->type
->get_base_type();
410 switch (this->type
->base_type
) {
411 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
412 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
413 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
414 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
415 default: assert(!"Should not get here."); break;
419 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
421 this->ir_type
= ir_type_constant
;
424 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
425 || type
->is_record() || type
->is_array());
427 if (type
->is_array()) {
428 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
430 foreach_list(node
, value_list
) {
431 ir_constant
*value
= (ir_constant
*) node
;
432 assert(value
->as_constant() != NULL
);
434 this->array_elements
[i
++] = value
;
439 /* If the constant is a record, the types of each of the entries in
440 * value_list must be a 1-for-1 match with the structure components. Each
441 * entry must also be a constant. Just move the nodes from the value_list
442 * to the list in the ir_constant.
444 /* FINISHME: Should there be some type checking and / or assertions here? */
445 /* FINISHME: Should the new constant take ownership of the nodes from
446 * FINISHME: value_list, or should it make copies?
448 if (type
->is_record()) {
449 value_list
->move_nodes_to(& this->components
);
453 for (unsigned i
= 0; i
< 16; i
++) {
454 this->value
.u
[i
] = 0;
457 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
459 /* Constructors with exactly one scalar argument are special for vectors
460 * and matrices. For vectors, the scalar value is replicated to fill all
461 * the components. For matrices, the scalar fills the components of the
462 * diagonal while the rest is filled with 0.
464 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
465 if (type
->is_matrix()) {
466 /* Matrix - fill diagonal (rest is already set to 0) */
467 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
468 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
469 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
471 /* Vector or scalar - fill all components */
472 switch (type
->base_type
) {
475 for (unsigned i
= 0; i
< type
->components(); i
++)
476 this->value
.u
[i
] = value
->value
.u
[0];
478 case GLSL_TYPE_FLOAT
:
479 for (unsigned i
= 0; i
< type
->components(); i
++)
480 this->value
.f
[i
] = value
->value
.f
[0];
483 for (unsigned i
= 0; i
< type
->components(); i
++)
484 this->value
.b
[i
] = value
->value
.b
[0];
487 assert(!"Should not get here.");
494 if (type
->is_matrix() && value
->type
->is_matrix()) {
495 assert(value
->next
->is_tail_sentinel());
497 /* From section 5.4.2 of the GLSL 1.20 spec:
498 * "If a matrix is constructed from a matrix, then each component
499 * (column i, row j) in the result that has a corresponding component
500 * (column i, row j) in the argument will be initialized from there."
502 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
503 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
504 for (unsigned i
= 0; i
< cols
; i
++) {
505 for (unsigned j
= 0; j
< rows
; j
++) {
506 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
507 const unsigned dst
= i
* type
->vector_elements
+ j
;
508 this->value
.f
[dst
] = value
->value
.f
[src
];
512 /* "All other components will be initialized to the identity matrix." */
513 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
514 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
519 /* Use each component from each entry in the value_list to initialize one
520 * component of the constant being constructed.
522 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
523 assert(value
->as_constant() != NULL
);
524 assert(!value
->is_tail_sentinel());
526 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
527 switch (type
->base_type
) {
529 this->value
.u
[i
] = value
->get_uint_component(j
);
532 this->value
.i
[i
] = value
->get_int_component(j
);
534 case GLSL_TYPE_FLOAT
:
535 this->value
.f
[i
] = value
->get_float_component(j
);
538 this->value
.b
[i
] = value
->get_bool_component(j
);
541 /* FINISHME: What to do? Exceptions are not the answer.
547 if (i
>= type
->components())
551 value
= (ir_constant
*) value
->next
;
556 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
558 assert(type
->is_numeric() || type
->is_boolean());
560 ir_constant
*c
= new(mem_ctx
) ir_constant
;
562 memset(&c
->value
, 0, sizeof(c
->value
));
568 ir_constant::get_bool_component(unsigned i
) const
570 switch (this->type
->base_type
) {
571 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
572 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
573 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
574 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
575 default: assert(!"Should not get here."); break;
578 /* Must return something to make the compiler happy. This is clearly an
585 ir_constant::get_float_component(unsigned i
) const
587 switch (this->type
->base_type
) {
588 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
589 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
590 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
591 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
592 default: assert(!"Should not get here."); break;
595 /* Must return something to make the compiler happy. This is clearly an
602 ir_constant::get_int_component(unsigned i
) const
604 switch (this->type
->base_type
) {
605 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
606 case GLSL_TYPE_INT
: return this->value
.i
[i
];
607 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
608 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
609 default: assert(!"Should not get here."); break;
612 /* Must return something to make the compiler happy. This is clearly an
619 ir_constant::get_uint_component(unsigned i
) const
621 switch (this->type
->base_type
) {
622 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
623 case GLSL_TYPE_INT
: return this->value
.i
[i
];
624 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
625 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
626 default: assert(!"Should not get here."); break;
629 /* Must return something to make the compiler happy. This is clearly an
636 ir_constant::get_array_element(unsigned i
) const
638 assert(this->type
->is_array());
640 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
642 * "Behavior is undefined if a shader subscripts an array with an index
643 * less than 0 or greater than or equal to the size the array was
646 * Most out-of-bounds accesses are removed before things could get this far.
647 * There are cases where non-constant array index values can get constant
652 else if (i
>= this->type
->length
)
653 i
= this->type
->length
- 1;
655 return array_elements
[i
];
659 ir_constant::get_record_field(const char *name
)
661 int idx
= this->type
->field_index(name
);
666 if (this->components
.is_empty())
669 exec_node
*node
= this->components
.head
;
670 for (int i
= 0; i
< idx
; i
++) {
673 /* If the end of the list is encountered before the element matching the
674 * requested field is found, return NULL.
676 if (node
->is_tail_sentinel())
680 return (ir_constant
*) node
;
685 ir_constant::has_value(const ir_constant
*c
) const
687 if (this->type
!= c
->type
)
690 if (this->type
->is_array()) {
691 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
692 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
698 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
699 const exec_node
*a_node
= this->components
.head
;
700 const exec_node
*b_node
= c
->components
.head
;
702 while (!a_node
->is_tail_sentinel()) {
703 assert(!b_node
->is_tail_sentinel());
705 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
706 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
708 if (!a_field
->has_value(b_field
))
711 a_node
= a_node
->next
;
712 b_node
= b_node
->next
;
718 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
719 switch (this->type
->base_type
) {
721 if (this->value
.u
[i
] != c
->value
.u
[i
])
725 if (this->value
.i
[i
] != c
->value
.i
[i
])
728 case GLSL_TYPE_FLOAT
:
729 if (this->value
.f
[i
] != c
->value
.f
[i
])
733 if (this->value
.b
[i
] != c
->value
.b
[i
])
737 assert(!"Should not get here.");
748 this->ir_type
= ir_type_loop
;
749 this->cmp
= ir_unop_neg
;
752 this->increment
= NULL
;
753 this->counter
= NULL
;
757 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
759 this->ir_type
= ir_type_dereference_variable
;
761 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
765 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
766 ir_rvalue
*array_index
)
768 this->ir_type
= ir_type_dereference_array
;
769 this->array_index
= array_index
;
770 this->set_array(value
);
774 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
775 ir_rvalue
*array_index
)
777 void *ctx
= talloc_parent(var
);
779 this->ir_type
= ir_type_dereference_array
;
780 this->array_index
= array_index
;
781 this->set_array(new(ctx
) ir_dereference_variable(var
));
786 ir_dereference_array::set_array(ir_rvalue
*value
)
789 this->type
= glsl_type::error_type
;
791 if (this->array
!= NULL
) {
792 const glsl_type
*const vt
= this->array
->type
;
794 if (vt
->is_array()) {
795 type
= vt
->element_type();
796 } else if (vt
->is_matrix()) {
797 type
= vt
->column_type();
798 } else if (vt
->is_vector()) {
799 type
= vt
->get_base_type();
805 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
808 this->ir_type
= ir_type_dereference_record
;
809 this->record
= value
;
810 this->field
= talloc_strdup(this, field
);
811 this->type
= (this->record
!= NULL
)
812 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
816 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
819 void *ctx
= talloc_parent(var
);
821 this->ir_type
= ir_type_dereference_record
;
822 this->record
= new(ctx
) ir_dereference_variable(var
);
823 this->field
= talloc_strdup(this, field
);
824 this->type
= (this->record
!= NULL
)
825 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
828 bool type_contains_sampler(const glsl_type
*type
)
830 if (type
->is_array()) {
831 return type_contains_sampler(type
->fields
.array
);
832 } else if (type
->is_record()) {
833 for (unsigned int i
= 0; i
< type
->length
; i
++) {
834 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
839 return type
->is_sampler();
844 ir_dereference::is_lvalue()
846 ir_variable
*var
= this->variable_referenced();
848 /* Every l-value derference chain eventually ends in a variable.
850 if ((var
== NULL
) || var
->read_only
)
853 if (this->type
->is_array() && !var
->array_lvalue
)
856 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
858 * "Samplers cannot be treated as l-values; hence cannot be used
859 * as out or inout function parameters, nor can they be
862 if (type_contains_sampler(this->type
))
869 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
871 const char *ir_texture::opcode_string()
873 assert((unsigned int) op
<=
874 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
875 return tex_opcode_strs
[op
];
879 ir_texture::get_opcode(const char *str
)
881 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
882 for (int op
= 0; op
< count
; op
++) {
883 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
884 return (ir_texture_opcode
) op
;
886 return (ir_texture_opcode
) -1;
891 ir_texture::set_sampler(ir_dereference
*sampler
)
893 assert(sampler
!= NULL
);
894 this->sampler
= sampler
;
896 switch (sampler
->type
->sampler_type
) {
897 case GLSL_TYPE_FLOAT
:
898 this->type
= glsl_type::vec4_type
;
901 this->type
= glsl_type::ivec4_type
;
904 this->type
= glsl_type::uvec4_type
;
911 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
913 assert((count
>= 1) && (count
<= 4));
915 memset(&this->mask
, 0, sizeof(this->mask
));
916 this->mask
.num_components
= count
;
918 unsigned dup_mask
= 0;
921 assert(comp
[3] <= 3);
922 dup_mask
|= (1U << comp
[3])
923 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
924 this->mask
.w
= comp
[3];
927 assert(comp
[2] <= 3);
928 dup_mask
|= (1U << comp
[2])
929 & ((1U << comp
[0]) | (1U << comp
[1]));
930 this->mask
.z
= comp
[2];
933 assert(comp
[1] <= 3);
934 dup_mask
|= (1U << comp
[1])
936 this->mask
.y
= comp
[1];
939 assert(comp
[0] <= 3);
940 this->mask
.x
= comp
[0];
943 this->mask
.has_duplicates
= dup_mask
!= 0;
945 /* Based on the number of elements in the swizzle and the base type
946 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
947 * generate the type of the resulting value.
949 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
952 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
953 unsigned w
, unsigned count
)
956 const unsigned components
[4] = { x
, y
, z
, w
};
957 this->ir_type
= ir_type_swizzle
;
958 this->init_mask(components
, count
);
961 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
965 this->ir_type
= ir_type_swizzle
;
966 this->init_mask(comp
, count
);
969 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
971 this->ir_type
= ir_type_swizzle
;
974 this->type
= glsl_type::get_instance(val
->type
->base_type
,
975 mask
.num_components
, 1);
984 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
986 void *ctx
= talloc_parent(val
);
988 /* For each possible swizzle character, this table encodes the value in
989 * \c idx_map that represents the 0th element of the vector. For invalid
990 * swizzle characters (e.g., 'k'), a special value is used that will allow
991 * detection of errors.
993 static const unsigned char base_idx
[26] = {
994 /* a b c d e f g h i j k l m */
995 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
996 /* n o p q r s t u v w x y z */
997 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1000 /* Each valid swizzle character has an entry in the previous table. This
1001 * table encodes the base index encoded in the previous table plus the actual
1002 * index of the swizzle character. When processing swizzles, the first
1003 * character in the string is indexed in the previous table. Each character
1004 * in the string is indexed in this table, and the value found there has the
1005 * value form the first table subtracted. The result must be on the range
1008 * For example, the string "wzyx" will get X from the first table. Each of
1009 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1010 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1012 * The string "wzrg" will get X from the first table. Each of the characters
1013 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1014 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1015 * [0,3], the error is detected.
1017 static const unsigned char idx_map
[26] = {
1018 /* a b c d e f g h i j k l m */
1019 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1020 /* n o p q r s t u v w x y z */
1021 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1024 int swiz_idx
[4] = { 0, 0, 0, 0 };
1028 /* Validate the first character in the swizzle string and look up the base
1029 * index value as described above.
1031 if ((str
[0] < 'a') || (str
[0] > 'z'))
1034 const unsigned base
= base_idx
[str
[0] - 'a'];
1037 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1038 /* Validate the next character, and, as described above, convert it to a
1041 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1044 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1045 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1052 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1062 ir_swizzle::variable_referenced()
1064 return this->val
->variable_referenced();
1068 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1069 ir_variable_mode mode
)
1070 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1071 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1073 this->ir_type
= ir_type_variable
;
1075 this->name
= talloc_strdup(this, name
);
1076 this->explicit_location
= false;
1077 this->location
= -1;
1078 this->warn_extension
= NULL
;
1079 this->constant_value
= NULL
;
1080 this->origin_upper_left
= false;
1081 this->pixel_center_integer
= false;
1083 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1084 this->read_only
= true;
1089 ir_variable::interpolation_string() const
1091 switch (this->interpolation
) {
1092 case ir_var_smooth
: return "smooth";
1093 case ir_var_flat
: return "flat";
1094 case ir_var_noperspective
: return "noperspective";
1097 assert(!"Should not get here.");
1103 ir_variable::component_slots() const
1105 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1106 return this->type
->component_slots();
1110 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1111 : return_type(return_type
), is_defined(false), _function(NULL
)
1113 this->ir_type
= ir_type_function_signature
;
1114 this->is_builtin
= false;
1119 ir_function_signature::qualifiers_match(exec_list
*params
)
1121 exec_list_iterator iter_a
= parameters
.iterator();
1122 exec_list_iterator iter_b
= params
->iterator();
1124 /* check that the qualifiers match. */
1125 while (iter_a
.has_next()) {
1126 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1127 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1129 if (a
->read_only
!= b
->read_only
||
1130 a
->mode
!= b
->mode
||
1131 a
->interpolation
!= b
->interpolation
||
1132 a
->centroid
!= b
->centroid
) {
1134 /* parameter a's qualifiers don't match */
1146 ir_function_signature::replace_parameters(exec_list
*new_params
)
1148 /* Destroy all of the previous parameter information. If the previous
1149 * parameter information comes from the function prototype, it may either
1150 * specify incorrect parameter names or not have names at all.
1152 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1153 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1158 new_params
->move_nodes_to(¶meters
);
1162 ir_function::ir_function(const char *name
)
1164 this->ir_type
= ir_type_function
;
1165 this->name
= talloc_strdup(this, name
);
1170 ir_function::has_user_signature()
1172 foreach_list(n
, &this->signatures
) {
1173 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1174 if (!sig
->is_builtin
)
1182 ir_call::get_error_instruction(void *ctx
)
1184 ir_call
*call
= new(ctx
) ir_call
;
1186 call
->type
= glsl_type::error_type
;
1191 ir_call::set_callee(ir_function_signature
*sig
)
1193 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1199 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1201 foreach_iter(exec_list_iterator
, iter
, *list
) {
1202 ((ir_instruction
*)iter
.get())->accept(visitor
);
1208 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1210 ir_variable
*var
= ir
->as_variable();
1211 ir_constant
*constant
= ir
->as_constant();
1212 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1213 steal_memory(var
->constant_value
, ir
);
1215 /* The components of aggregate constants are not visited by the normal
1216 * visitor, so steal their values by hand.
1218 if (constant
!= NULL
) {
1219 if (constant
->type
->is_record()) {
1220 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1221 ir_constant
*field
= (ir_constant
*)iter
.get();
1222 steal_memory(field
, ir
);
1224 } else if (constant
->type
->is_array()) {
1225 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1226 steal_memory(constant
->array_elements
[i
], ir
);
1231 talloc_steal(new_ctx
, ir
);
1236 reparent_ir(exec_list
*list
, void *mem_ctx
)
1238 foreach_list(node
, list
) {
1239 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);