2 * Copyright © 2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #include "main/core.h" /* for MAX2 */
26 #include "ir_visitor.h"
27 #include "glsl_types.h"
29 ir_rvalue::ir_rvalue()
31 this->type
= glsl_type::error_type
;
34 bool ir_rvalue::is_zero() const
39 bool ir_rvalue::is_one() const
44 bool ir_rvalue::is_negative_one() const
49 bool ir_rvalue::is_basis() const
55 * Modify the swizzle make to move one component to another
57 * \param m IR swizzle to be modified
58 * \param from Component in the RHS that is to be swizzled
59 * \param to Desired swizzle location of \c from
62 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
65 case 0: m
.x
= from
; break;
66 case 1: m
.y
= from
; break;
67 case 2: m
.z
= from
; break;
68 case 3: m
.w
= from
; break;
69 default: assert(!"Should not get here.");
72 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
76 ir_assignment::set_lhs(ir_rvalue
*lhs
)
79 bool swizzled
= false;
82 ir_swizzle
*swiz
= lhs
->as_swizzle();
87 unsigned write_mask
= 0;
88 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
90 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
94 case 0: c
= swiz
->mask
.x
; break;
95 case 1: c
= swiz
->mask
.y
; break;
96 case 2: c
= swiz
->mask
.z
; break;
97 case 3: c
= swiz
->mask
.w
; break;
98 default: assert(!"Should not get here.");
101 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
102 update_rhs_swizzle(rhs_swiz
, i
, c
);
105 this->write_mask
= write_mask
;
108 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
113 /* Now, RHS channels line up with the LHS writemask. Collapse it
114 * to just the channels that will be written.
116 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
118 for (int i
= 0; i
< 4; i
++) {
119 if (write_mask
& (1 << i
))
120 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
122 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
125 assert((lhs
== NULL
) || lhs
->as_dereference());
127 this->lhs
= (ir_dereference
*) lhs
;
131 ir_assignment::whole_variable_written()
133 ir_variable
*v
= this->lhs
->whole_variable_referenced();
138 if (v
->type
->is_scalar())
141 if (v
->type
->is_vector()) {
142 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
144 if (mask
!= this->write_mask
)
148 /* Either all the vector components are assigned or the variable is some
149 * composite type (and the whole thing is assigned.
154 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
155 ir_rvalue
*condition
, unsigned write_mask
)
157 this->ir_type
= ir_type_assignment
;
158 this->condition
= condition
;
161 this->write_mask
= write_mask
;
163 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
164 int lhs_components
= 0;
165 for (int i
= 0; i
< 4; i
++) {
166 if (write_mask
& (1 << i
))
170 assert(lhs_components
== this->rhs
->type
->vector_elements
);
174 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
175 ir_rvalue
*condition
)
177 this->ir_type
= ir_type_assignment
;
178 this->condition
= condition
;
181 /* If the RHS is a vector type, assume that all components of the vector
182 * type are being written to the LHS. The write mask comes from the RHS
183 * because we can have a case where the LHS is a vec4 and the RHS is a
184 * vec3. In that case, the assignment is:
186 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
188 if (rhs
->type
->is_vector())
189 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
190 else if (rhs
->type
->is_scalar())
191 this->write_mask
= 1;
193 this->write_mask
= 0;
199 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
202 assert(get_num_operands(ir_expression_operation(op
)) == 1);
203 this->ir_type
= ir_type_expression
;
205 this->operation
= ir_expression_operation(op
);
206 this->operands
[0] = op0
;
207 this->operands
[1] = NULL
;
208 this->operands
[2] = NULL
;
209 this->operands
[3] = NULL
;
212 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
213 ir_rvalue
*op0
, ir_rvalue
*op1
)
215 assert(((op1
== NULL
) && (get_num_operands(ir_expression_operation(op
)) == 1))
216 || (get_num_operands(ir_expression_operation(op
)) == 2));
217 this->ir_type
= ir_type_expression
;
219 this->operation
= ir_expression_operation(op
);
220 this->operands
[0] = op0
;
221 this->operands
[1] = op1
;
222 this->operands
[2] = NULL
;
223 this->operands
[3] = NULL
;
226 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
227 ir_rvalue
*op0
, ir_rvalue
*op1
,
228 ir_rvalue
*op2
, ir_rvalue
*op3
)
230 this->ir_type
= ir_type_expression
;
232 this->operation
= ir_expression_operation(op
);
233 this->operands
[0] = op0
;
234 this->operands
[1] = op1
;
235 this->operands
[2] = op2
;
236 this->operands
[3] = op3
;
239 ir_expression::ir_expression(int op
, ir_rvalue
*op0
)
241 this->ir_type
= ir_type_expression
;
243 this->operation
= ir_expression_operation(op
);
244 this->operands
[0] = op0
;
245 this->operands
[1] = NULL
;
246 this->operands
[2] = NULL
;
247 this->operands
[3] = NULL
;
249 assert(op
<= ir_last_unop
);
251 switch (this->operation
) {
252 case ir_unop_bit_not
:
253 case ir_unop_logic_not
:
268 case ir_unop_round_even
:
271 case ir_unop_sin_reduced
:
272 case ir_unop_cos_reduced
:
275 this->type
= op0
->type
;
281 case ir_unop_bitcast_f2i
:
282 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
283 op0
->type
->vector_elements
, 1);
289 case ir_unop_bitcast_i2f
:
290 case ir_unop_bitcast_u2f
:
291 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
292 op0
->type
->vector_elements
, 1);
297 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
298 op0
->type
->vector_elements
, 1);
303 case ir_unop_bitcast_f2u
:
304 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
305 op0
->type
->vector_elements
, 1);
309 this->type
= glsl_type::float_type
;
313 this->type
= glsl_type::bool_type
;
317 assert(!"not reached: missing automatic type setup for ir_expression");
318 this->type
= op0
->type
;
323 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
325 this->ir_type
= ir_type_expression
;
327 this->operation
= ir_expression_operation(op
);
328 this->operands
[0] = op0
;
329 this->operands
[1] = op1
;
330 this->operands
[2] = NULL
;
331 this->operands
[3] = NULL
;
333 assert(op
> ir_last_unop
);
335 switch (this->operation
) {
336 case ir_binop_all_equal
:
337 case ir_binop_any_nequal
:
338 this->type
= glsl_type::bool_type
;
349 if (op0
->type
->is_scalar()) {
350 this->type
= op1
->type
;
351 } else if (op1
->type
->is_scalar()) {
352 this->type
= op0
->type
;
354 /* FINISHME: matrix types */
355 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
356 assert(op0
->type
== op1
->type
);
357 this->type
= op0
->type
;
361 case ir_binop_logic_and
:
362 case ir_binop_logic_xor
:
363 case ir_binop_logic_or
:
364 case ir_binop_bit_and
:
365 case ir_binop_bit_xor
:
366 case ir_binop_bit_or
:
367 if (op0
->type
->is_scalar()) {
368 this->type
= op1
->type
;
369 } else if (op1
->type
->is_scalar()) {
370 this->type
= op0
->type
;
375 case ir_binop_nequal
:
376 case ir_binop_lequal
:
377 case ir_binop_gequal
:
379 case ir_binop_greater
:
380 assert(op0
->type
== op1
->type
);
381 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
382 op0
->type
->vector_elements
, 1);
386 this->type
= glsl_type::float_type
;
389 case ir_binop_lshift
:
390 case ir_binop_rshift
:
391 this->type
= op0
->type
;
395 assert(!"not reached: missing automatic type setup for ir_expression");
396 this->type
= glsl_type::float_type
;
401 ir_expression::get_num_operands(ir_expression_operation op
)
403 assert(op
<= ir_last_opcode
);
405 if (op
<= ir_last_unop
)
408 if (op
<= ir_last_binop
)
411 if (op
== ir_quadop_vector
)
418 static const char *const operator_strs
[] = {
487 const char *ir_expression::operator_string(ir_expression_operation op
)
489 assert((unsigned int) op
< Elements(operator_strs
));
490 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
491 return operator_strs
[op
];
494 const char *ir_expression::operator_string()
496 return operator_string(this->operation
);
500 depth_layout_string(ir_depth_layout layout
)
503 case ir_depth_layout_none
: return "";
504 case ir_depth_layout_any
: return "depth_any";
505 case ir_depth_layout_greater
: return "depth_greater";
506 case ir_depth_layout_less
: return "depth_less";
507 case ir_depth_layout_unchanged
: return "depth_unchanged";
515 ir_expression_operation
516 ir_expression::get_operator(const char *str
)
518 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
519 for (int op
= 0; op
< operator_count
; op
++) {
520 if (strcmp(str
, operator_strs
[op
]) == 0)
521 return (ir_expression_operation
) op
;
523 return (ir_expression_operation
) -1;
526 ir_constant::ir_constant()
528 this->ir_type
= ir_type_constant
;
531 ir_constant::ir_constant(const struct glsl_type
*type
,
532 const ir_constant_data
*data
)
534 assert((type
->base_type
>= GLSL_TYPE_UINT
)
535 && (type
->base_type
<= GLSL_TYPE_BOOL
));
537 this->ir_type
= ir_type_constant
;
539 memcpy(& this->value
, data
, sizeof(this->value
));
542 ir_constant::ir_constant(float f
)
544 this->ir_type
= ir_type_constant
;
545 this->type
= glsl_type::float_type
;
546 this->value
.f
[0] = f
;
547 for (int i
= 1; i
< 16; i
++) {
548 this->value
.f
[i
] = 0;
552 ir_constant::ir_constant(unsigned int u
)
554 this->ir_type
= ir_type_constant
;
555 this->type
= glsl_type::uint_type
;
556 this->value
.u
[0] = u
;
557 for (int i
= 1; i
< 16; i
++) {
558 this->value
.u
[i
] = 0;
562 ir_constant::ir_constant(int i
)
564 this->ir_type
= ir_type_constant
;
565 this->type
= glsl_type::int_type
;
566 this->value
.i
[0] = i
;
567 for (int i
= 1; i
< 16; i
++) {
568 this->value
.i
[i
] = 0;
572 ir_constant::ir_constant(bool b
)
574 this->ir_type
= ir_type_constant
;
575 this->type
= glsl_type::bool_type
;
576 this->value
.b
[0] = b
;
577 for (int i
= 1; i
< 16; i
++) {
578 this->value
.b
[i
] = false;
582 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
584 this->ir_type
= ir_type_constant
;
585 this->type
= c
->type
->get_base_type();
587 switch (this->type
->base_type
) {
588 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
589 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
590 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
591 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
592 default: assert(!"Should not get here."); break;
596 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
598 this->ir_type
= ir_type_constant
;
601 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
602 || type
->is_record() || type
->is_array());
604 if (type
->is_array()) {
605 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
607 foreach_list(node
, value_list
) {
608 ir_constant
*value
= (ir_constant
*) node
;
609 assert(value
->as_constant() != NULL
);
611 this->array_elements
[i
++] = value
;
616 /* If the constant is a record, the types of each of the entries in
617 * value_list must be a 1-for-1 match with the structure components. Each
618 * entry must also be a constant. Just move the nodes from the value_list
619 * to the list in the ir_constant.
621 /* FINISHME: Should there be some type checking and / or assertions here? */
622 /* FINISHME: Should the new constant take ownership of the nodes from
623 * FINISHME: value_list, or should it make copies?
625 if (type
->is_record()) {
626 value_list
->move_nodes_to(& this->components
);
630 for (unsigned i
= 0; i
< 16; i
++) {
631 this->value
.u
[i
] = 0;
634 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
636 /* Constructors with exactly one scalar argument are special for vectors
637 * and matrices. For vectors, the scalar value is replicated to fill all
638 * the components. For matrices, the scalar fills the components of the
639 * diagonal while the rest is filled with 0.
641 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
642 if (type
->is_matrix()) {
643 /* Matrix - fill diagonal (rest is already set to 0) */
644 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
645 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
646 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
648 /* Vector or scalar - fill all components */
649 switch (type
->base_type
) {
652 for (unsigned i
= 0; i
< type
->components(); i
++)
653 this->value
.u
[i
] = value
->value
.u
[0];
655 case GLSL_TYPE_FLOAT
:
656 for (unsigned i
= 0; i
< type
->components(); i
++)
657 this->value
.f
[i
] = value
->value
.f
[0];
660 for (unsigned i
= 0; i
< type
->components(); i
++)
661 this->value
.b
[i
] = value
->value
.b
[0];
664 assert(!"Should not get here.");
671 if (type
->is_matrix() && value
->type
->is_matrix()) {
672 assert(value
->next
->is_tail_sentinel());
674 /* From section 5.4.2 of the GLSL 1.20 spec:
675 * "If a matrix is constructed from a matrix, then each component
676 * (column i, row j) in the result that has a corresponding component
677 * (column i, row j) in the argument will be initialized from there."
679 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
680 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
681 for (unsigned i
= 0; i
< cols
; i
++) {
682 for (unsigned j
= 0; j
< rows
; j
++) {
683 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
684 const unsigned dst
= i
* type
->vector_elements
+ j
;
685 this->value
.f
[dst
] = value
->value
.f
[src
];
689 /* "All other components will be initialized to the identity matrix." */
690 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
691 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
696 /* Use each component from each entry in the value_list to initialize one
697 * component of the constant being constructed.
699 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
700 assert(value
->as_constant() != NULL
);
701 assert(!value
->is_tail_sentinel());
703 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
704 switch (type
->base_type
) {
706 this->value
.u
[i
] = value
->get_uint_component(j
);
709 this->value
.i
[i
] = value
->get_int_component(j
);
711 case GLSL_TYPE_FLOAT
:
712 this->value
.f
[i
] = value
->get_float_component(j
);
715 this->value
.b
[i
] = value
->get_bool_component(j
);
718 /* FINISHME: What to do? Exceptions are not the answer.
724 if (i
>= type
->components())
728 value
= (ir_constant
*) value
->next
;
733 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
735 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
736 || type
->is_record() || type
->is_array());
738 ir_constant
*c
= new(mem_ctx
) ir_constant
;
740 memset(&c
->value
, 0, sizeof(c
->value
));
742 if (type
->is_array()) {
743 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
745 for (unsigned i
= 0; i
< type
->length
; i
++)
746 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
749 if (type
->is_record()) {
750 for (unsigned i
= 0; i
< type
->length
; i
++) {
751 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
752 c
->components
.push_tail(comp
);
760 ir_constant::get_bool_component(unsigned i
) const
762 switch (this->type
->base_type
) {
763 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
764 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
765 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
766 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
767 default: assert(!"Should not get here."); break;
770 /* Must return something to make the compiler happy. This is clearly an
777 ir_constant::get_float_component(unsigned i
) const
779 switch (this->type
->base_type
) {
780 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
781 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
782 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
783 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
784 default: assert(!"Should not get here."); break;
787 /* Must return something to make the compiler happy. This is clearly an
794 ir_constant::get_int_component(unsigned i
) const
796 switch (this->type
->base_type
) {
797 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
798 case GLSL_TYPE_INT
: return this->value
.i
[i
];
799 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
800 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
801 default: assert(!"Should not get here."); break;
804 /* Must return something to make the compiler happy. This is clearly an
811 ir_constant::get_uint_component(unsigned i
) const
813 switch (this->type
->base_type
) {
814 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
815 case GLSL_TYPE_INT
: return this->value
.i
[i
];
816 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
817 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
818 default: assert(!"Should not get here."); break;
821 /* Must return something to make the compiler happy. This is clearly an
828 ir_constant::get_array_element(unsigned i
) const
830 assert(this->type
->is_array());
832 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
834 * "Behavior is undefined if a shader subscripts an array with an index
835 * less than 0 or greater than or equal to the size the array was
838 * Most out-of-bounds accesses are removed before things could get this far.
839 * There are cases where non-constant array index values can get constant
844 else if (i
>= this->type
->length
)
845 i
= this->type
->length
- 1;
847 return array_elements
[i
];
851 ir_constant::get_record_field(const char *name
)
853 int idx
= this->type
->field_index(name
);
858 if (this->components
.is_empty())
861 exec_node
*node
= this->components
.head
;
862 for (int i
= 0; i
< idx
; i
++) {
865 /* If the end of the list is encountered before the element matching the
866 * requested field is found, return NULL.
868 if (node
->is_tail_sentinel())
872 return (ir_constant
*) node
;
876 ir_constant::copy_offset(ir_constant
*src
, int offset
)
878 switch (this->type
->base_type
) {
881 case GLSL_TYPE_FLOAT
:
882 case GLSL_TYPE_BOOL
: {
883 unsigned int size
= src
->type
->components();
884 assert (size
<= this->type
->components() - offset
);
885 for (unsigned int i
=0; i
<size
; i
++) {
886 switch (this->type
->base_type
) {
888 value
.u
[i
+offset
] = src
->get_uint_component(i
);
891 value
.i
[i
+offset
] = src
->get_int_component(i
);
893 case GLSL_TYPE_FLOAT
:
894 value
.f
[i
+offset
] = src
->get_float_component(i
);
897 value
.b
[i
+offset
] = src
->get_bool_component(i
);
899 default: // Shut up the compiler
906 case GLSL_TYPE_STRUCT
: {
907 assert (src
->type
== this->type
);
908 this->components
.make_empty();
909 foreach_list(node
, &src
->components
) {
910 ir_constant
*const orig
= (ir_constant
*) node
;
912 this->components
.push_tail(orig
->clone(this, NULL
));
917 case GLSL_TYPE_ARRAY
: {
918 assert (src
->type
== this->type
);
919 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
920 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
926 assert(!"Should not get here.");
932 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
934 assert (!type
->is_array() && !type
->is_record());
936 if (!type
->is_vector() && !type
->is_matrix()) {
942 for (int i
=0; i
<4; i
++) {
943 if (mask
& (1 << i
)) {
944 switch (this->type
->base_type
) {
946 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
949 value
.i
[i
+offset
] = src
->get_int_component(id
++);
951 case GLSL_TYPE_FLOAT
:
952 value
.f
[i
+offset
] = src
->get_float_component(id
++);
955 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
958 assert(!"Should not get here.");
966 ir_constant::has_value(const ir_constant
*c
) const
968 if (this->type
!= c
->type
)
971 if (this->type
->is_array()) {
972 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
973 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
979 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
980 const exec_node
*a_node
= this->components
.head
;
981 const exec_node
*b_node
= c
->components
.head
;
983 while (!a_node
->is_tail_sentinel()) {
984 assert(!b_node
->is_tail_sentinel());
986 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
987 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
989 if (!a_field
->has_value(b_field
))
992 a_node
= a_node
->next
;
993 b_node
= b_node
->next
;
999 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1000 switch (this->type
->base_type
) {
1001 case GLSL_TYPE_UINT
:
1002 if (this->value
.u
[i
] != c
->value
.u
[i
])
1006 if (this->value
.i
[i
] != c
->value
.i
[i
])
1009 case GLSL_TYPE_FLOAT
:
1010 if (this->value
.f
[i
] != c
->value
.f
[i
])
1013 case GLSL_TYPE_BOOL
:
1014 if (this->value
.b
[i
] != c
->value
.b
[i
])
1018 assert(!"Should not get here.");
1027 ir_constant::is_zero() const
1029 if (!this->type
->is_scalar() && !this->type
->is_vector())
1032 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1033 switch (this->type
->base_type
) {
1034 case GLSL_TYPE_FLOAT
:
1035 if (this->value
.f
[c
] != 0.0)
1039 if (this->value
.i
[c
] != 0)
1042 case GLSL_TYPE_UINT
:
1043 if (this->value
.u
[c
] != 0)
1046 case GLSL_TYPE_BOOL
:
1047 if (this->value
.b
[c
] != false)
1051 /* The only other base types are structures, arrays, and samplers.
1052 * Samplers cannot be constants, and the others should have been
1053 * filtered out above.
1055 assert(!"Should not get here.");
1064 ir_constant::is_one() const
1066 if (!this->type
->is_scalar() && !this->type
->is_vector())
1069 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1070 switch (this->type
->base_type
) {
1071 case GLSL_TYPE_FLOAT
:
1072 if (this->value
.f
[c
] != 1.0)
1076 if (this->value
.i
[c
] != 1)
1079 case GLSL_TYPE_UINT
:
1080 if (this->value
.u
[c
] != 1)
1083 case GLSL_TYPE_BOOL
:
1084 if (this->value
.b
[c
] != true)
1088 /* The only other base types are structures, arrays, and samplers.
1089 * Samplers cannot be constants, and the others should have been
1090 * filtered out above.
1092 assert(!"Should not get here.");
1101 ir_constant::is_negative_one() const
1103 if (!this->type
->is_scalar() && !this->type
->is_vector())
1106 if (this->type
->is_boolean())
1109 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1110 switch (this->type
->base_type
) {
1111 case GLSL_TYPE_FLOAT
:
1112 if (this->value
.f
[c
] != -1.0)
1116 if (this->value
.i
[c
] != -1)
1119 case GLSL_TYPE_UINT
:
1120 if (int(this->value
.u
[c
]) != -1)
1124 /* The only other base types are structures, arrays, samplers, and
1125 * booleans. Samplers cannot be constants, and the others should
1126 * have been filtered out above.
1128 assert(!"Should not get here.");
1137 ir_constant::is_basis() const
1139 if (!this->type
->is_scalar() && !this->type
->is_vector())
1142 if (this->type
->is_boolean())
1146 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1147 switch (this->type
->base_type
) {
1148 case GLSL_TYPE_FLOAT
:
1149 if (this->value
.f
[c
] == 1.0)
1151 else if (this->value
.f
[c
] != 0.0)
1155 if (this->value
.i
[c
] == 1)
1157 else if (this->value
.i
[c
] != 0)
1160 case GLSL_TYPE_UINT
:
1161 if (int(this->value
.u
[c
]) == 1)
1163 else if (int(this->value
.u
[c
]) != 0)
1167 /* The only other base types are structures, arrays, samplers, and
1168 * booleans. Samplers cannot be constants, and the others should
1169 * have been filtered out above.
1171 assert(!"Should not get here.");
1181 this->ir_type
= ir_type_loop
;
1182 this->cmp
= ir_unop_neg
;
1185 this->increment
= NULL
;
1186 this->counter
= NULL
;
1190 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1192 assert(var
!= NULL
);
1194 this->ir_type
= ir_type_dereference_variable
;
1196 this->type
= var
->type
;
1200 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1201 ir_rvalue
*array_index
)
1203 this->ir_type
= ir_type_dereference_array
;
1204 this->array_index
= array_index
;
1205 this->set_array(value
);
1209 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1210 ir_rvalue
*array_index
)
1212 void *ctx
= ralloc_parent(var
);
1214 this->ir_type
= ir_type_dereference_array
;
1215 this->array_index
= array_index
;
1216 this->set_array(new(ctx
) ir_dereference_variable(var
));
1221 ir_dereference_array::set_array(ir_rvalue
*value
)
1223 assert(value
!= NULL
);
1225 this->array
= value
;
1227 const glsl_type
*const vt
= this->array
->type
;
1229 if (vt
->is_array()) {
1230 type
= vt
->element_type();
1231 } else if (vt
->is_matrix()) {
1232 type
= vt
->column_type();
1233 } else if (vt
->is_vector()) {
1234 type
= vt
->get_base_type();
1239 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1242 assert(value
!= NULL
);
1244 this->ir_type
= ir_type_dereference_record
;
1245 this->record
= value
;
1246 this->field
= ralloc_strdup(this, field
);
1247 this->type
= this->record
->type
->field_type(field
);
1251 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1254 void *ctx
= ralloc_parent(var
);
1256 this->ir_type
= ir_type_dereference_record
;
1257 this->record
= new(ctx
) ir_dereference_variable(var
);
1258 this->field
= ralloc_strdup(this, field
);
1259 this->type
= this->record
->type
->field_type(field
);
1263 ir_dereference::is_lvalue() const
1265 ir_variable
*var
= this->variable_referenced();
1267 /* Every l-value derference chain eventually ends in a variable.
1269 if ((var
== NULL
) || var
->read_only
)
1272 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1274 * "Samplers cannot be treated as l-values; hence cannot be used
1275 * as out or inout function parameters, nor can they be
1278 if (this->type
->contains_sampler())
1285 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1287 const char *ir_texture::opcode_string()
1289 assert((unsigned int) op
<=
1290 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1291 return tex_opcode_strs
[op
];
1295 ir_texture::get_opcode(const char *str
)
1297 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1298 for (int op
= 0; op
< count
; op
++) {
1299 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1300 return (ir_texture_opcode
) op
;
1302 return (ir_texture_opcode
) -1;
1307 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1309 assert(sampler
!= NULL
);
1310 assert(type
!= NULL
);
1311 this->sampler
= sampler
;
1314 if (this->op
== ir_txs
) {
1315 assert(type
->base_type
== GLSL_TYPE_INT
);
1317 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1318 if (sampler
->type
->sampler_shadow
)
1319 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1321 assert(type
->vector_elements
== 4);
1327 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1329 assert((count
>= 1) && (count
<= 4));
1331 memset(&this->mask
, 0, sizeof(this->mask
));
1332 this->mask
.num_components
= count
;
1334 unsigned dup_mask
= 0;
1337 assert(comp
[3] <= 3);
1338 dup_mask
|= (1U << comp
[3])
1339 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1340 this->mask
.w
= comp
[3];
1343 assert(comp
[2] <= 3);
1344 dup_mask
|= (1U << comp
[2])
1345 & ((1U << comp
[0]) | (1U << comp
[1]));
1346 this->mask
.z
= comp
[2];
1349 assert(comp
[1] <= 3);
1350 dup_mask
|= (1U << comp
[1])
1351 & ((1U << comp
[0]));
1352 this->mask
.y
= comp
[1];
1355 assert(comp
[0] <= 3);
1356 this->mask
.x
= comp
[0];
1359 this->mask
.has_duplicates
= dup_mask
!= 0;
1361 /* Based on the number of elements in the swizzle and the base type
1362 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1363 * generate the type of the resulting value.
1365 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1368 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1369 unsigned w
, unsigned count
)
1372 const unsigned components
[4] = { x
, y
, z
, w
};
1373 this->ir_type
= ir_type_swizzle
;
1374 this->init_mask(components
, count
);
1377 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1381 this->ir_type
= ir_type_swizzle
;
1382 this->init_mask(comp
, count
);
1385 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1387 this->ir_type
= ir_type_swizzle
;
1390 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1391 mask
.num_components
, 1);
1400 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1402 void *ctx
= ralloc_parent(val
);
1404 /* For each possible swizzle character, this table encodes the value in
1405 * \c idx_map that represents the 0th element of the vector. For invalid
1406 * swizzle characters (e.g., 'k'), a special value is used that will allow
1407 * detection of errors.
1409 static const unsigned char base_idx
[26] = {
1410 /* a b c d e f g h i j k l m */
1411 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1412 /* n o p q r s t u v w x y z */
1413 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1416 /* Each valid swizzle character has an entry in the previous table. This
1417 * table encodes the base index encoded in the previous table plus the actual
1418 * index of the swizzle character. When processing swizzles, the first
1419 * character in the string is indexed in the previous table. Each character
1420 * in the string is indexed in this table, and the value found there has the
1421 * value form the first table subtracted. The result must be on the range
1424 * For example, the string "wzyx" will get X from the first table. Each of
1425 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1426 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1428 * The string "wzrg" will get X from the first table. Each of the characters
1429 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1430 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1431 * [0,3], the error is detected.
1433 static const unsigned char idx_map
[26] = {
1434 /* a b c d e f g h i j k l m */
1435 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1436 /* n o p q r s t u v w x y z */
1437 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1440 int swiz_idx
[4] = { 0, 0, 0, 0 };
1444 /* Validate the first character in the swizzle string and look up the base
1445 * index value as described above.
1447 if ((str
[0] < 'a') || (str
[0] > 'z'))
1450 const unsigned base
= base_idx
[str
[0] - 'a'];
1453 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1454 /* Validate the next character, and, as described above, convert it to a
1457 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1460 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1461 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1468 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1478 ir_swizzle::variable_referenced() const
1480 return this->val
->variable_referenced();
1484 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1485 ir_variable_mode mode
)
1486 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1487 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1489 this->ir_type
= ir_type_variable
;
1491 this->name
= ralloc_strdup(this, name
);
1492 this->explicit_location
= false;
1493 this->has_initializer
= false;
1494 this->location
= -1;
1495 this->location_frac
= 0;
1496 this->uniform_block
= -1;
1497 this->warn_extension
= NULL
;
1498 this->constant_value
= NULL
;
1499 this->constant_initializer
= NULL
;
1500 this->origin_upper_left
= false;
1501 this->pixel_center_integer
= false;
1502 this->depth_layout
= ir_depth_layout_none
;
1505 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1506 this->read_only
= true;
1511 ir_variable::interpolation_string() const
1513 switch (this->interpolation
) {
1514 case INTERP_QUALIFIER_NONE
: return "no";
1515 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1516 case INTERP_QUALIFIER_FLAT
: return "flat";
1517 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1520 assert(!"Should not get here.");
1525 glsl_interp_qualifier
1526 ir_variable::determine_interpolation_mode(bool flat_shade
)
1528 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1529 return (glsl_interp_qualifier
) this->interpolation
;
1530 int location
= this->location
;
1532 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1533 if (flat_shade
&& is_gl_Color
)
1534 return INTERP_QUALIFIER_FLAT
;
1536 return INTERP_QUALIFIER_SMOOTH
;
1540 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1541 : return_type(return_type
), is_defined(false), _function(NULL
)
1543 this->ir_type
= ir_type_function_signature
;
1544 this->is_builtin
= false;
1545 this->origin
= NULL
;
1550 modes_match(unsigned a
, unsigned b
)
1555 /* Accept "in" vs. "const in" */
1556 if ((a
== ir_var_const_in
&& b
== ir_var_in
) ||
1557 (b
== ir_var_const_in
&& a
== ir_var_in
))
1565 ir_function_signature::qualifiers_match(exec_list
*params
)
1567 exec_list_iterator iter_a
= parameters
.iterator();
1568 exec_list_iterator iter_b
= params
->iterator();
1570 /* check that the qualifiers match. */
1571 while (iter_a
.has_next()) {
1572 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1573 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1575 if (a
->read_only
!= b
->read_only
||
1576 !modes_match(a
->mode
, b
->mode
) ||
1577 a
->interpolation
!= b
->interpolation
||
1578 a
->centroid
!= b
->centroid
) {
1580 /* parameter a's qualifiers don't match */
1592 ir_function_signature::replace_parameters(exec_list
*new_params
)
1594 /* Destroy all of the previous parameter information. If the previous
1595 * parameter information comes from the function prototype, it may either
1596 * specify incorrect parameter names or not have names at all.
1598 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1599 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1604 new_params
->move_nodes_to(¶meters
);
1608 ir_function::ir_function(const char *name
)
1610 this->ir_type
= ir_type_function
;
1611 this->name
= ralloc_strdup(this, name
);
1616 ir_function::has_user_signature()
1618 foreach_list(n
, &this->signatures
) {
1619 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1620 if (!sig
->is_builtin
)
1628 ir_rvalue::error_value(void *mem_ctx
)
1630 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1632 v
->type
= glsl_type::error_type
;
1638 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1640 foreach_iter(exec_list_iterator
, iter
, *list
) {
1641 ((ir_instruction
*)iter
.get())->accept(visitor
);
1647 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1649 ir_variable
*var
= ir
->as_variable();
1650 ir_constant
*constant
= ir
->as_constant();
1651 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1652 steal_memory(var
->constant_value
, ir
);
1654 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1655 steal_memory(var
->constant_initializer
, ir
);
1657 /* The components of aggregate constants are not visited by the normal
1658 * visitor, so steal their values by hand.
1660 if (constant
!= NULL
) {
1661 if (constant
->type
->is_record()) {
1662 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1663 ir_constant
*field
= (ir_constant
*)iter
.get();
1664 steal_memory(field
, ir
);
1666 } else if (constant
->type
->is_array()) {
1667 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1668 steal_memory(constant
->array_elements
[i
], ir
);
1673 ralloc_steal(new_ctx
, ir
);
1678 reparent_ir(exec_list
*list
, void *mem_ctx
)
1680 foreach_list(node
, list
) {
1681 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1687 try_min_one(ir_rvalue
*ir
)
1689 ir_expression
*expr
= ir
->as_expression();
1691 if (!expr
|| expr
->operation
!= ir_binop_min
)
1694 if (expr
->operands
[0]->is_one())
1695 return expr
->operands
[1];
1697 if (expr
->operands
[1]->is_one())
1698 return expr
->operands
[0];
1704 try_max_zero(ir_rvalue
*ir
)
1706 ir_expression
*expr
= ir
->as_expression();
1708 if (!expr
|| expr
->operation
!= ir_binop_max
)
1711 if (expr
->operands
[0]->is_zero())
1712 return expr
->operands
[1];
1714 if (expr
->operands
[1]->is_zero())
1715 return expr
->operands
[0];
1721 ir_rvalue::as_rvalue_to_saturate()
1723 ir_expression
*expr
= this->as_expression();
1728 ir_rvalue
*max_zero
= try_max_zero(expr
);
1730 return try_min_one(max_zero
);
1732 ir_rvalue
*min_one
= try_min_one(expr
);
1734 return try_max_zero(min_one
);