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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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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 ir_swizzle
*swiz
= lhs
->as_swizzle();
64 unsigned write_mask
= 0;
65 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
67 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
71 case 0: c
= swiz
->mask
.x
; break;
72 case 1: c
= swiz
->mask
.y
; break;
73 case 2: c
= swiz
->mask
.z
; break;
74 case 3: c
= swiz
->mask
.w
; break;
75 default: assert(!"Should not get here.");
78 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
79 update_rhs_swizzle(rhs_swiz
, i
, c
);
82 this->write_mask
= write_mask
;
85 this->rhs
= new(this) ir_swizzle(this->rhs
, rhs_swiz
);
88 assert((lhs
== NULL
) || lhs
->as_dereference());
90 this->lhs
= (ir_dereference
*) lhs
;
94 ir_assignment::whole_variable_written()
96 ir_variable
*v
= this->lhs
->whole_variable_referenced();
101 if (v
->type
->is_scalar())
104 if (v
->type
->is_vector()) {
105 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
107 if (mask
!= this->write_mask
)
111 /* Either all the vector components are assigned or the variable is some
112 * composite type (and the whole thing is assigned.
117 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
118 ir_rvalue
*condition
, unsigned write_mask
)
120 this->ir_type
= ir_type_assignment
;
121 this->condition
= condition
;
124 this->write_mask
= write_mask
;
127 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
128 ir_rvalue
*condition
)
130 this->ir_type
= ir_type_assignment
;
131 this->condition
= condition
;
134 /* If the RHS is a vector type, assume that all components of the vector
135 * type are being written to the LHS. The write mask comes from the RHS
136 * because we can have a case where the LHS is a vec4 and the RHS is a
137 * vec3. In that case, the assignment is:
139 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
141 if (rhs
->type
->is_vector())
142 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
143 else if (rhs
->type
->is_scalar())
144 this->write_mask
= 1;
146 this->write_mask
= 0;
152 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
153 ir_rvalue
*op0
, ir_rvalue
*op1
)
155 this->ir_type
= ir_type_expression
;
157 this->operation
= ir_expression_operation(op
);
158 this->operands
[0] = op0
;
159 this->operands
[1] = op1
;
163 ir_expression::get_num_operands(ir_expression_operation op
)
165 /* Update ir_print_visitor.cpp when updating this list. */
166 const int num_operands
[] = {
167 1, /* ir_unop_bit_not */
168 1, /* ir_unop_logic_not */
171 1, /* ir_unop_sign */
174 1, /* ir_unop_sqrt */
177 1, /* ir_unop_exp2 */
178 1, /* ir_unop_log2 */
188 1, /* ir_unop_trunc */
189 1, /* ir_unop_ceil */
190 1, /* ir_unop_floor */
191 1, /* ir_unop_fract */
196 1, /* ir_unop_dFdx */
197 1, /* ir_unop_dFdy */
199 2, /* ir_binop_add */
200 2, /* ir_binop_sub */
201 2, /* ir_binop_mul */
202 2, /* ir_binop_div */
203 2, /* ir_binop_mod */
205 2, /* ir_binop_less */
206 2, /* ir_binop_greater */
207 2, /* ir_binop_lequal */
208 2, /* ir_binop_gequal */
209 2, /* ir_binop_equal */
210 2, /* ir_binop_nequal */
212 2, /* ir_binop_lshift */
213 2, /* ir_binop_rshift */
214 2, /* ir_binop_bit_and */
215 2, /* ir_binop_bit_xor */
216 2, /* ir_binop_bit_or */
218 2, /* ir_binop_logic_and */
219 2, /* ir_binop_logic_xor */
220 2, /* ir_binop_logic_or */
222 2, /* ir_binop_dot */
223 2, /* ir_binop_cross */
224 2, /* ir_binop_min */
225 2, /* ir_binop_max */
227 2, /* ir_binop_pow */
230 assert(sizeof(num_operands
) / sizeof(num_operands
[0]) == ir_binop_pow
+ 1);
232 return num_operands
[op
];
235 static const char *const operator_strs
[] = {
290 const char *ir_expression::operator_string(ir_expression_operation op
)
292 assert((unsigned int) op
< Elements(operator_strs
));
293 return operator_strs
[op
];
296 const char *ir_expression::operator_string()
298 return operator_string(this->operation
);
301 ir_expression_operation
302 ir_expression::get_operator(const char *str
)
304 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
305 for (int op
= 0; op
< operator_count
; op
++) {
306 if (strcmp(str
, operator_strs
[op
]) == 0)
307 return (ir_expression_operation
) op
;
309 return (ir_expression_operation
) -1;
312 ir_constant::ir_constant()
314 this->ir_type
= ir_type_constant
;
317 ir_constant::ir_constant(const struct glsl_type
*type
,
318 const ir_constant_data
*data
)
320 assert((type
->base_type
>= GLSL_TYPE_UINT
)
321 && (type
->base_type
<= GLSL_TYPE_BOOL
));
323 this->ir_type
= ir_type_constant
;
325 memcpy(& this->value
, data
, sizeof(this->value
));
328 ir_constant::ir_constant(float f
)
330 this->ir_type
= ir_type_constant
;
331 this->type
= glsl_type::float_type
;
332 this->value
.f
[0] = f
;
333 for (int i
= 1; i
< 16; i
++) {
334 this->value
.f
[i
] = 0;
338 ir_constant::ir_constant(unsigned int u
)
340 this->ir_type
= ir_type_constant
;
341 this->type
= glsl_type::uint_type
;
342 this->value
.u
[0] = u
;
343 for (int i
= 1; i
< 16; i
++) {
344 this->value
.u
[i
] = 0;
348 ir_constant::ir_constant(int i
)
350 this->ir_type
= ir_type_constant
;
351 this->type
= glsl_type::int_type
;
352 this->value
.i
[0] = i
;
353 for (int i
= 1; i
< 16; i
++) {
354 this->value
.i
[i
] = 0;
358 ir_constant::ir_constant(bool b
)
360 this->ir_type
= ir_type_constant
;
361 this->type
= glsl_type::bool_type
;
362 this->value
.b
[0] = b
;
363 for (int i
= 1; i
< 16; i
++) {
364 this->value
.b
[i
] = false;
368 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
370 this->ir_type
= ir_type_constant
;
371 this->type
= c
->type
->get_base_type();
373 switch (this->type
->base_type
) {
374 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
375 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
376 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
377 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
378 default: assert(!"Should not get here."); break;
382 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
384 this->ir_type
= ir_type_constant
;
387 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
388 || type
->is_record() || type
->is_array());
390 if (type
->is_array()) {
391 this->array_elements
= talloc_array(this, ir_constant
*, type
->length
);
393 foreach_list(node
, value_list
) {
394 ir_constant
*value
= (ir_constant
*) node
;
395 assert(value
->as_constant() != NULL
);
397 this->array_elements
[i
++] = value
;
402 /* If the constant is a record, the types of each of the entries in
403 * value_list must be a 1-for-1 match with the structure components. Each
404 * entry must also be a constant. Just move the nodes from the value_list
405 * to the list in the ir_constant.
407 /* FINISHME: Should there be some type checking and / or assertions here? */
408 /* FINISHME: Should the new constant take ownership of the nodes from
409 * FINISHME: value_list, or should it make copies?
411 if (type
->is_record()) {
412 value_list
->move_nodes_to(& this->components
);
416 for (unsigned i
= 0; i
< 16; i
++) {
417 this->value
.u
[i
] = 0;
420 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
422 /* Constructors with exactly one scalar argument are special for vectors
423 * and matrices. For vectors, the scalar value is replicated to fill all
424 * the components. For matrices, the scalar fills the components of the
425 * diagonal while the rest is filled with 0.
427 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
428 if (type
->is_matrix()) {
429 /* Matrix - fill diagonal (rest is already set to 0) */
430 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
431 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
432 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
434 /* Vector or scalar - fill all components */
435 switch (type
->base_type
) {
438 for (unsigned i
= 0; i
< type
->components(); i
++)
439 this->value
.u
[i
] = value
->value
.u
[0];
441 case GLSL_TYPE_FLOAT
:
442 for (unsigned i
= 0; i
< type
->components(); i
++)
443 this->value
.f
[i
] = value
->value
.f
[0];
446 for (unsigned i
= 0; i
< type
->components(); i
++)
447 this->value
.b
[i
] = value
->value
.b
[0];
450 assert(!"Should not get here.");
457 if (type
->is_matrix() && value
->type
->is_matrix()) {
458 assert(value
->next
->is_tail_sentinel());
460 /* From section 5.4.2 of the GLSL 1.20 spec:
461 * "If a matrix is constructed from a matrix, then each component
462 * (column i, row j) in the result that has a corresponding component
463 * (column i, row j) in the argument will be initialized from there."
465 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
466 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
467 for (unsigned i
= 0; i
< cols
; i
++) {
468 for (unsigned j
= 0; j
< rows
; j
++) {
469 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
470 const unsigned dst
= i
* type
->vector_elements
+ j
;
471 this->value
.f
[dst
] = value
->value
.f
[src
];
475 /* "All other components will be initialized to the identity matrix." */
476 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
477 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
482 /* Use each component from each entry in the value_list to initialize one
483 * component of the constant being constructed.
485 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
486 assert(value
->as_constant() != NULL
);
487 assert(!value
->is_tail_sentinel());
489 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
490 switch (type
->base_type
) {
492 this->value
.u
[i
] = value
->get_uint_component(j
);
495 this->value
.i
[i
] = value
->get_int_component(j
);
497 case GLSL_TYPE_FLOAT
:
498 this->value
.f
[i
] = value
->get_float_component(j
);
501 this->value
.b
[i
] = value
->get_bool_component(j
);
504 /* FINISHME: What to do? Exceptions are not the answer.
510 if (i
>= type
->components())
514 value
= (ir_constant
*) value
->next
;
519 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
521 assert(type
->is_numeric() || type
->is_boolean());
523 ir_constant
*c
= new(mem_ctx
) ir_constant
;
525 memset(&c
->value
, 0, sizeof(c
->value
));
531 ir_constant::get_bool_component(unsigned i
) const
533 switch (this->type
->base_type
) {
534 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
535 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
536 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
537 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
538 default: assert(!"Should not get here."); break;
541 /* Must return something to make the compiler happy. This is clearly an
548 ir_constant::get_float_component(unsigned i
) const
550 switch (this->type
->base_type
) {
551 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
552 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
553 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
554 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
555 default: assert(!"Should not get here."); break;
558 /* Must return something to make the compiler happy. This is clearly an
565 ir_constant::get_int_component(unsigned i
) const
567 switch (this->type
->base_type
) {
568 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
569 case GLSL_TYPE_INT
: return this->value
.i
[i
];
570 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
571 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
572 default: assert(!"Should not get here."); break;
575 /* Must return something to make the compiler happy. This is clearly an
582 ir_constant::get_uint_component(unsigned i
) const
584 switch (this->type
->base_type
) {
585 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
586 case GLSL_TYPE_INT
: return this->value
.i
[i
];
587 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
588 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
589 default: assert(!"Should not get here."); break;
592 /* Must return something to make the compiler happy. This is clearly an
599 ir_constant::get_array_element(unsigned i
) const
601 assert(this->type
->is_array());
603 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
605 * "Behavior is undefined if a shader subscripts an array with an index
606 * less than 0 or greater than or equal to the size the array was
609 * Most out-of-bounds accesses are removed before things could get this far.
610 * There are cases where non-constant array index values can get constant
615 else if (i
>= this->type
->length
)
616 i
= this->type
->length
- 1;
618 return array_elements
[i
];
622 ir_constant::get_record_field(const char *name
)
624 int idx
= this->type
->field_index(name
);
629 if (this->components
.is_empty())
632 exec_node
*node
= this->components
.head
;
633 for (int i
= 0; i
< idx
; i
++) {
636 /* If the end of the list is encountered before the element matching the
637 * requested field is found, return NULL.
639 if (node
->is_tail_sentinel())
643 return (ir_constant
*) node
;
648 ir_constant::has_value(const ir_constant
*c
) const
650 if (this->type
!= c
->type
)
653 if (this->type
->is_array()) {
654 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
655 if (this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
661 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
662 const exec_node
*a_node
= this->components
.head
;
663 const exec_node
*b_node
= c
->components
.head
;
665 while (!a_node
->is_tail_sentinel()) {
666 assert(!b_node
->is_tail_sentinel());
668 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
669 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
671 if (!a_field
->has_value(b_field
))
674 a_node
= a_node
->next
;
675 b_node
= b_node
->next
;
681 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
682 switch (this->type
->base_type
) {
684 if (this->value
.u
[i
] != c
->value
.u
[i
])
688 if (this->value
.i
[i
] != c
->value
.i
[i
])
691 case GLSL_TYPE_FLOAT
:
692 if (this->value
.f
[i
] != c
->value
.f
[i
])
696 if (this->value
.b
[i
] != c
->value
.b
[i
])
700 assert(!"Should not get here.");
711 this->ir_type
= ir_type_loop
;
712 this->cmp
= ir_unop_neg
;
715 this->increment
= NULL
;
716 this->counter
= NULL
;
720 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
722 this->ir_type
= ir_type_dereference_variable
;
724 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
728 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
729 ir_rvalue
*array_index
)
731 this->ir_type
= ir_type_dereference_array
;
732 this->array_index
= array_index
;
733 this->set_array(value
);
737 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
738 ir_rvalue
*array_index
)
740 void *ctx
= talloc_parent(var
);
742 this->ir_type
= ir_type_dereference_array
;
743 this->array_index
= array_index
;
744 this->set_array(new(ctx
) ir_dereference_variable(var
));
749 ir_dereference_array::set_array(ir_rvalue
*value
)
752 this->type
= glsl_type::error_type
;
754 if (this->array
!= NULL
) {
755 const glsl_type
*const vt
= this->array
->type
;
757 if (vt
->is_array()) {
758 type
= vt
->element_type();
759 } else if (vt
->is_matrix()) {
760 type
= vt
->column_type();
761 } else if (vt
->is_vector()) {
762 type
= vt
->get_base_type();
768 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
771 this->ir_type
= ir_type_dereference_record
;
772 this->record
= value
;
773 this->field
= talloc_strdup(this, field
);
774 this->type
= (this->record
!= NULL
)
775 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
779 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
782 void *ctx
= talloc_parent(var
);
784 this->ir_type
= ir_type_dereference_record
;
785 this->record
= new(ctx
) ir_dereference_variable(var
);
786 this->field
= talloc_strdup(this, field
);
787 this->type
= (this->record
!= NULL
)
788 ? this->record
->type
->field_type(field
) : glsl_type::error_type
;
791 bool type_contains_sampler(const glsl_type
*type
)
793 if (type
->is_array()) {
794 return type_contains_sampler(type
->fields
.array
);
795 } else if (type
->is_record()) {
796 for (unsigned int i
= 0; i
< type
->length
; i
++) {
797 if (type_contains_sampler(type
->fields
.structure
[i
].type
))
802 return type
->is_sampler();
807 ir_dereference::is_lvalue()
809 ir_variable
*var
= this->variable_referenced();
811 /* Every l-value derference chain eventually ends in a variable.
813 if ((var
== NULL
) || var
->read_only
)
816 if (this->type
->is_array() && !var
->array_lvalue
)
819 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
821 * "Samplers cannot be treated as l-values; hence cannot be used
822 * as out or inout function parameters, nor can they be
825 if (type_contains_sampler(this->type
))
832 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf" };
834 const char *ir_texture::opcode_string()
836 assert((unsigned int) op
<=
837 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
838 return tex_opcode_strs
[op
];
842 ir_texture::get_opcode(const char *str
)
844 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
845 for (int op
= 0; op
< count
; op
++) {
846 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
847 return (ir_texture_opcode
) op
;
849 return (ir_texture_opcode
) -1;
854 ir_texture::set_sampler(ir_dereference
*sampler
)
856 assert(sampler
!= NULL
);
857 this->sampler
= sampler
;
859 switch (sampler
->type
->sampler_type
) {
860 case GLSL_TYPE_FLOAT
:
861 this->type
= glsl_type::vec4_type
;
864 this->type
= glsl_type::ivec4_type
;
867 this->type
= glsl_type::uvec4_type
;
874 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
876 assert((count
>= 1) && (count
<= 4));
878 memset(&this->mask
, 0, sizeof(this->mask
));
879 this->mask
.num_components
= count
;
881 unsigned dup_mask
= 0;
884 assert(comp
[3] <= 3);
885 dup_mask
|= (1U << comp
[3])
886 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
887 this->mask
.w
= comp
[3];
890 assert(comp
[2] <= 3);
891 dup_mask
|= (1U << comp
[2])
892 & ((1U << comp
[0]) | (1U << comp
[1]));
893 this->mask
.z
= comp
[2];
896 assert(comp
[1] <= 3);
897 dup_mask
|= (1U << comp
[1])
899 this->mask
.y
= comp
[1];
902 assert(comp
[0] <= 3);
903 this->mask
.x
= comp
[0];
906 this->mask
.has_duplicates
= dup_mask
!= 0;
908 /* Based on the number of elements in the swizzle and the base type
909 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
910 * generate the type of the resulting value.
912 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
915 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
916 unsigned w
, unsigned count
)
919 const unsigned components
[4] = { x
, y
, z
, w
};
920 this->ir_type
= ir_type_swizzle
;
921 this->init_mask(components
, count
);
924 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
928 this->ir_type
= ir_type_swizzle
;
929 this->init_mask(comp
, count
);
932 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
934 this->ir_type
= ir_type_swizzle
;
937 this->type
= glsl_type::get_instance(val
->type
->base_type
,
938 mask
.num_components
, 1);
947 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
949 void *ctx
= talloc_parent(val
);
951 /* For each possible swizzle character, this table encodes the value in
952 * \c idx_map that represents the 0th element of the vector. For invalid
953 * swizzle characters (e.g., 'k'), a special value is used that will allow
954 * detection of errors.
956 static const unsigned char base_idx
[26] = {
957 /* a b c d e f g h i j k l m */
958 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
959 /* n o p q r s t u v w x y z */
960 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
963 /* Each valid swizzle character has an entry in the previous table. This
964 * table encodes the base index encoded in the previous table plus the actual
965 * index of the swizzle character. When processing swizzles, the first
966 * character in the string is indexed in the previous table. Each character
967 * in the string is indexed in this table, and the value found there has the
968 * value form the first table subtracted. The result must be on the range
971 * For example, the string "wzyx" will get X from the first table. Each of
972 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
973 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
975 * The string "wzrg" will get X from the first table. Each of the characters
976 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
977 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
978 * [0,3], the error is detected.
980 static const unsigned char idx_map
[26] = {
981 /* a b c d e f g h i j k l m */
982 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
983 /* n o p q r s t u v w x y z */
984 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
987 int swiz_idx
[4] = { 0, 0, 0, 0 };
991 /* Validate the first character in the swizzle string and look up the base
992 * index value as described above.
994 if ((str
[0] < 'a') || (str
[0] > 'z'))
997 const unsigned base
= base_idx
[str
[0] - 'a'];
1000 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1001 /* Validate the next character, and, as described above, convert it to a
1004 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1007 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1008 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1015 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1025 ir_swizzle::variable_referenced()
1027 return this->val
->variable_referenced();
1031 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1032 ir_variable_mode mode
)
1033 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1034 mode(mode
), interpolation(ir_var_smooth
), array_lvalue(false)
1036 this->ir_type
= ir_type_variable
;
1038 this->name
= talloc_strdup(this, name
);
1039 this->location
= -1;
1040 this->warn_extension
= NULL
;
1041 this->constant_value
= NULL
;
1042 this->origin_upper_left
= false;
1043 this->pixel_center_integer
= false;
1045 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1046 this->read_only
= true;
1051 ir_variable::interpolation_string() const
1053 switch (this->interpolation
) {
1054 case ir_var_smooth
: return "smooth";
1055 case ir_var_flat
: return "flat";
1056 case ir_var_noperspective
: return "noperspective";
1059 assert(!"Should not get here.");
1065 ir_variable::component_slots() const
1067 /* FINISHME: Sparsely accessed arrays require fewer slots. */
1068 return this->type
->component_slots();
1072 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1073 : return_type(return_type
), is_defined(false), _function(NULL
)
1075 this->ir_type
= ir_type_function_signature
;
1076 this->is_builtin
= false;
1081 ir_function_signature::qualifiers_match(exec_list
*params
)
1083 exec_list_iterator iter_a
= parameters
.iterator();
1084 exec_list_iterator iter_b
= params
->iterator();
1086 /* check that the qualifiers match. */
1087 while (iter_a
.has_next()) {
1088 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1089 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1091 if (a
->read_only
!= b
->read_only
||
1092 a
->mode
!= b
->mode
||
1093 a
->interpolation
!= b
->interpolation
||
1094 a
->centroid
!= b
->centroid
) {
1096 /* parameter a's qualifiers don't match */
1108 ir_function_signature::replace_parameters(exec_list
*new_params
)
1110 /* Destroy all of the previous parameter information. If the previous
1111 * parameter information comes from the function prototype, it may either
1112 * specify incorrect parameter names or not have names at all.
1114 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1115 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1120 new_params
->move_nodes_to(¶meters
);
1124 ir_function::ir_function(const char *name
)
1126 this->ir_type
= ir_type_function
;
1127 this->name
= talloc_strdup(this, name
);
1132 ir_function::has_builtin_signature()
1134 foreach_list(n
, &this->signatures
) {
1135 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1136 if (sig
->is_builtin
)
1144 ir_call::get_error_instruction(void *ctx
)
1146 ir_call
*call
= new(ctx
) ir_call
;
1148 call
->type
= glsl_type::error_type
;
1153 ir_call::set_callee(ir_function_signature
*sig
)
1155 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1161 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1163 foreach_iter(exec_list_iterator
, iter
, *list
) {
1164 ((ir_instruction
*)iter
.get())->accept(visitor
);
1170 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1172 ir_variable
*var
= ir
->as_variable();
1173 ir_constant
*constant
= ir
->as_constant();
1174 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1175 steal_memory(var
->constant_value
, ir
);
1177 /* The components of aggregate constants are not visited by the normal
1178 * visitor, so steal their values by hand.
1180 if (constant
!= NULL
) {
1181 if (constant
->type
->is_record()) {
1182 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1183 ir_constant
*field
= (ir_constant
*)iter
.get();
1184 steal_memory(field
, ir
);
1186 } else if (constant
->type
->is_array()) {
1187 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1188 steal_memory(constant
->array_elements
[i
], ir
);
1193 talloc_steal(new_ctx
, ir
);
1198 reparent_ir(exec_list
*list
, void *mem_ctx
)
1200 foreach_list(node
, list
) {
1201 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);