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
[] = {
486 const char *ir_expression::operator_string(ir_expression_operation op
)
488 assert((unsigned int) op
< Elements(operator_strs
));
489 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
490 return operator_strs
[op
];
493 const char *ir_expression::operator_string()
495 return operator_string(this->operation
);
499 depth_layout_string(ir_depth_layout layout
)
502 case ir_depth_layout_none
: return "";
503 case ir_depth_layout_any
: return "depth_any";
504 case ir_depth_layout_greater
: return "depth_greater";
505 case ir_depth_layout_less
: return "depth_less";
506 case ir_depth_layout_unchanged
: return "depth_unchanged";
514 ir_expression_operation
515 ir_expression::get_operator(const char *str
)
517 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
518 for (int op
= 0; op
< operator_count
; op
++) {
519 if (strcmp(str
, operator_strs
[op
]) == 0)
520 return (ir_expression_operation
) op
;
522 return (ir_expression_operation
) -1;
525 ir_constant::ir_constant()
527 this->ir_type
= ir_type_constant
;
530 ir_constant::ir_constant(const struct glsl_type
*type
,
531 const ir_constant_data
*data
)
533 assert((type
->base_type
>= GLSL_TYPE_UINT
)
534 && (type
->base_type
<= GLSL_TYPE_BOOL
));
536 this->ir_type
= ir_type_constant
;
538 memcpy(& this->value
, data
, sizeof(this->value
));
541 ir_constant::ir_constant(float f
)
543 this->ir_type
= ir_type_constant
;
544 this->type
= glsl_type::float_type
;
545 this->value
.f
[0] = f
;
546 for (int i
= 1; i
< 16; i
++) {
547 this->value
.f
[i
] = 0;
551 ir_constant::ir_constant(unsigned int u
)
553 this->ir_type
= ir_type_constant
;
554 this->type
= glsl_type::uint_type
;
555 this->value
.u
[0] = u
;
556 for (int i
= 1; i
< 16; i
++) {
557 this->value
.u
[i
] = 0;
561 ir_constant::ir_constant(int i
)
563 this->ir_type
= ir_type_constant
;
564 this->type
= glsl_type::int_type
;
565 this->value
.i
[0] = i
;
566 for (int i
= 1; i
< 16; i
++) {
567 this->value
.i
[i
] = 0;
571 ir_constant::ir_constant(bool b
)
573 this->ir_type
= ir_type_constant
;
574 this->type
= glsl_type::bool_type
;
575 this->value
.b
[0] = b
;
576 for (int i
= 1; i
< 16; i
++) {
577 this->value
.b
[i
] = false;
581 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
583 this->ir_type
= ir_type_constant
;
584 this->type
= c
->type
->get_base_type();
586 switch (this->type
->base_type
) {
587 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
588 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
589 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
590 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
591 default: assert(!"Should not get here."); break;
595 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
597 this->ir_type
= ir_type_constant
;
600 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
601 || type
->is_record() || type
->is_array());
603 if (type
->is_array()) {
604 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
606 foreach_list(node
, value_list
) {
607 ir_constant
*value
= (ir_constant
*) node
;
608 assert(value
->as_constant() != NULL
);
610 this->array_elements
[i
++] = value
;
615 /* If the constant is a record, the types of each of the entries in
616 * value_list must be a 1-for-1 match with the structure components. Each
617 * entry must also be a constant. Just move the nodes from the value_list
618 * to the list in the ir_constant.
620 /* FINISHME: Should there be some type checking and / or assertions here? */
621 /* FINISHME: Should the new constant take ownership of the nodes from
622 * FINISHME: value_list, or should it make copies?
624 if (type
->is_record()) {
625 value_list
->move_nodes_to(& this->components
);
629 for (unsigned i
= 0; i
< 16; i
++) {
630 this->value
.u
[i
] = 0;
633 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
635 /* Constructors with exactly one scalar argument are special for vectors
636 * and matrices. For vectors, the scalar value is replicated to fill all
637 * the components. For matrices, the scalar fills the components of the
638 * diagonal while the rest is filled with 0.
640 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
641 if (type
->is_matrix()) {
642 /* Matrix - fill diagonal (rest is already set to 0) */
643 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
644 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
645 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
647 /* Vector or scalar - fill all components */
648 switch (type
->base_type
) {
651 for (unsigned i
= 0; i
< type
->components(); i
++)
652 this->value
.u
[i
] = value
->value
.u
[0];
654 case GLSL_TYPE_FLOAT
:
655 for (unsigned i
= 0; i
< type
->components(); i
++)
656 this->value
.f
[i
] = value
->value
.f
[0];
659 for (unsigned i
= 0; i
< type
->components(); i
++)
660 this->value
.b
[i
] = value
->value
.b
[0];
663 assert(!"Should not get here.");
670 if (type
->is_matrix() && value
->type
->is_matrix()) {
671 assert(value
->next
->is_tail_sentinel());
673 /* From section 5.4.2 of the GLSL 1.20 spec:
674 * "If a matrix is constructed from a matrix, then each component
675 * (column i, row j) in the result that has a corresponding component
676 * (column i, row j) in the argument will be initialized from there."
678 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
679 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
680 for (unsigned i
= 0; i
< cols
; i
++) {
681 for (unsigned j
= 0; j
< rows
; j
++) {
682 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
683 const unsigned dst
= i
* type
->vector_elements
+ j
;
684 this->value
.f
[dst
] = value
->value
.f
[src
];
688 /* "All other components will be initialized to the identity matrix." */
689 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
690 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
695 /* Use each component from each entry in the value_list to initialize one
696 * component of the constant being constructed.
698 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
699 assert(value
->as_constant() != NULL
);
700 assert(!value
->is_tail_sentinel());
702 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
703 switch (type
->base_type
) {
705 this->value
.u
[i
] = value
->get_uint_component(j
);
708 this->value
.i
[i
] = value
->get_int_component(j
);
710 case GLSL_TYPE_FLOAT
:
711 this->value
.f
[i
] = value
->get_float_component(j
);
714 this->value
.b
[i
] = value
->get_bool_component(j
);
717 /* FINISHME: What to do? Exceptions are not the answer.
723 if (i
>= type
->components())
727 value
= (ir_constant
*) value
->next
;
732 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
734 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
735 || type
->is_record() || type
->is_array());
737 ir_constant
*c
= new(mem_ctx
) ir_constant
;
739 memset(&c
->value
, 0, sizeof(c
->value
));
741 if (type
->is_array()) {
742 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
744 for (unsigned i
= 0; i
< type
->length
; i
++)
745 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
748 if (type
->is_record()) {
749 for (unsigned i
= 0; i
< type
->length
; i
++) {
750 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
751 c
->components
.push_tail(comp
);
759 ir_constant::get_bool_component(unsigned i
) const
761 switch (this->type
->base_type
) {
762 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
763 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
764 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
765 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
766 default: assert(!"Should not get here."); break;
769 /* Must return something to make the compiler happy. This is clearly an
776 ir_constant::get_float_component(unsigned i
) const
778 switch (this->type
->base_type
) {
779 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
780 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
781 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
782 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
783 default: assert(!"Should not get here."); break;
786 /* Must return something to make the compiler happy. This is clearly an
793 ir_constant::get_int_component(unsigned i
) const
795 switch (this->type
->base_type
) {
796 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
797 case GLSL_TYPE_INT
: return this->value
.i
[i
];
798 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
799 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
800 default: assert(!"Should not get here."); break;
803 /* Must return something to make the compiler happy. This is clearly an
810 ir_constant::get_uint_component(unsigned i
) const
812 switch (this->type
->base_type
) {
813 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
814 case GLSL_TYPE_INT
: return this->value
.i
[i
];
815 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
816 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
817 default: assert(!"Should not get here."); break;
820 /* Must return something to make the compiler happy. This is clearly an
827 ir_constant::get_array_element(unsigned i
) const
829 assert(this->type
->is_array());
831 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
833 * "Behavior is undefined if a shader subscripts an array with an index
834 * less than 0 or greater than or equal to the size the array was
837 * Most out-of-bounds accesses are removed before things could get this far.
838 * There are cases where non-constant array index values can get constant
843 else if (i
>= this->type
->length
)
844 i
= this->type
->length
- 1;
846 return array_elements
[i
];
850 ir_constant::get_record_field(const char *name
)
852 int idx
= this->type
->field_index(name
);
857 if (this->components
.is_empty())
860 exec_node
*node
= this->components
.head
;
861 for (int i
= 0; i
< idx
; i
++) {
864 /* If the end of the list is encountered before the element matching the
865 * requested field is found, return NULL.
867 if (node
->is_tail_sentinel())
871 return (ir_constant
*) node
;
875 ir_constant::copy_offset(ir_constant
*src
, int offset
)
877 switch (this->type
->base_type
) {
880 case GLSL_TYPE_FLOAT
:
881 case GLSL_TYPE_BOOL
: {
882 unsigned int size
= src
->type
->components();
883 assert (size
<= this->type
->components() - offset
);
884 for (unsigned int i
=0; i
<size
; i
++) {
885 switch (this->type
->base_type
) {
887 value
.u
[i
+offset
] = src
->get_uint_component(i
);
890 value
.i
[i
+offset
] = src
->get_int_component(i
);
892 case GLSL_TYPE_FLOAT
:
893 value
.f
[i
+offset
] = src
->get_float_component(i
);
896 value
.b
[i
+offset
] = src
->get_bool_component(i
);
898 default: // Shut up the compiler
905 case GLSL_TYPE_STRUCT
: {
906 assert (src
->type
== this->type
);
907 this->components
.make_empty();
908 foreach_list(node
, &src
->components
) {
909 ir_constant
*const orig
= (ir_constant
*) node
;
911 this->components
.push_tail(orig
->clone(this, NULL
));
916 case GLSL_TYPE_ARRAY
: {
917 assert (src
->type
== this->type
);
918 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
919 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
925 assert(!"Should not get here.");
931 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
933 assert (!type
->is_array() && !type
->is_record());
935 if (!type
->is_vector() && !type
->is_matrix()) {
941 for (int i
=0; i
<4; i
++) {
942 if (mask
& (1 << i
)) {
943 switch (this->type
->base_type
) {
945 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
948 value
.i
[i
+offset
] = src
->get_int_component(id
++);
950 case GLSL_TYPE_FLOAT
:
951 value
.f
[i
+offset
] = src
->get_float_component(id
++);
954 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
957 assert(!"Should not get here.");
965 ir_constant::has_value(const ir_constant
*c
) const
967 if (this->type
!= c
->type
)
970 if (this->type
->is_array()) {
971 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
972 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
978 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
979 const exec_node
*a_node
= this->components
.head
;
980 const exec_node
*b_node
= c
->components
.head
;
982 while (!a_node
->is_tail_sentinel()) {
983 assert(!b_node
->is_tail_sentinel());
985 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
986 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
988 if (!a_field
->has_value(b_field
))
991 a_node
= a_node
->next
;
992 b_node
= b_node
->next
;
998 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
999 switch (this->type
->base_type
) {
1000 case GLSL_TYPE_UINT
:
1001 if (this->value
.u
[i
] != c
->value
.u
[i
])
1005 if (this->value
.i
[i
] != c
->value
.i
[i
])
1008 case GLSL_TYPE_FLOAT
:
1009 if (this->value
.f
[i
] != c
->value
.f
[i
])
1012 case GLSL_TYPE_BOOL
:
1013 if (this->value
.b
[i
] != c
->value
.b
[i
])
1017 assert(!"Should not get here.");
1026 ir_constant::is_zero() const
1028 if (!this->type
->is_scalar() && !this->type
->is_vector())
1031 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1032 switch (this->type
->base_type
) {
1033 case GLSL_TYPE_FLOAT
:
1034 if (this->value
.f
[c
] != 0.0)
1038 if (this->value
.i
[c
] != 0)
1041 case GLSL_TYPE_UINT
:
1042 if (this->value
.u
[c
] != 0)
1045 case GLSL_TYPE_BOOL
:
1046 if (this->value
.b
[c
] != false)
1050 /* The only other base types are structures, arrays, and samplers.
1051 * Samplers cannot be constants, and the others should have been
1052 * filtered out above.
1054 assert(!"Should not get here.");
1063 ir_constant::is_one() const
1065 if (!this->type
->is_scalar() && !this->type
->is_vector())
1068 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1069 switch (this->type
->base_type
) {
1070 case GLSL_TYPE_FLOAT
:
1071 if (this->value
.f
[c
] != 1.0)
1075 if (this->value
.i
[c
] != 1)
1078 case GLSL_TYPE_UINT
:
1079 if (this->value
.u
[c
] != 1)
1082 case GLSL_TYPE_BOOL
:
1083 if (this->value
.b
[c
] != true)
1087 /* The only other base types are structures, arrays, and samplers.
1088 * Samplers cannot be constants, and the others should have been
1089 * filtered out above.
1091 assert(!"Should not get here.");
1100 ir_constant::is_negative_one() const
1102 if (!this->type
->is_scalar() && !this->type
->is_vector())
1105 if (this->type
->is_boolean())
1108 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1109 switch (this->type
->base_type
) {
1110 case GLSL_TYPE_FLOAT
:
1111 if (this->value
.f
[c
] != -1.0)
1115 if (this->value
.i
[c
] != -1)
1118 case GLSL_TYPE_UINT
:
1119 if (int(this->value
.u
[c
]) != -1)
1123 /* The only other base types are structures, arrays, samplers, and
1124 * booleans. Samplers cannot be constants, and the others should
1125 * have been filtered out above.
1127 assert(!"Should not get here.");
1136 ir_constant::is_basis() const
1138 if (!this->type
->is_scalar() && !this->type
->is_vector())
1141 if (this->type
->is_boolean())
1145 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1146 switch (this->type
->base_type
) {
1147 case GLSL_TYPE_FLOAT
:
1148 if (this->value
.f
[c
] == 1.0)
1150 else if (this->value
.f
[c
] != 0.0)
1154 if (this->value
.i
[c
] == 1)
1156 else if (this->value
.i
[c
] != 0)
1159 case GLSL_TYPE_UINT
:
1160 if (int(this->value
.u
[c
]) == 1)
1162 else if (int(this->value
.u
[c
]) != 0)
1166 /* The only other base types are structures, arrays, samplers, and
1167 * booleans. Samplers cannot be constants, and the others should
1168 * have been filtered out above.
1170 assert(!"Should not get here.");
1180 this->ir_type
= ir_type_loop
;
1181 this->cmp
= ir_unop_neg
;
1184 this->increment
= NULL
;
1185 this->counter
= NULL
;
1189 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1191 assert(var
!= NULL
);
1193 this->ir_type
= ir_type_dereference_variable
;
1195 this->type
= var
->type
;
1199 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1200 ir_rvalue
*array_index
)
1202 this->ir_type
= ir_type_dereference_array
;
1203 this->array_index
= array_index
;
1204 this->set_array(value
);
1208 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1209 ir_rvalue
*array_index
)
1211 void *ctx
= ralloc_parent(var
);
1213 this->ir_type
= ir_type_dereference_array
;
1214 this->array_index
= array_index
;
1215 this->set_array(new(ctx
) ir_dereference_variable(var
));
1220 ir_dereference_array::set_array(ir_rvalue
*value
)
1222 assert(value
!= NULL
);
1224 this->array
= value
;
1226 const glsl_type
*const vt
= this->array
->type
;
1228 if (vt
->is_array()) {
1229 type
= vt
->element_type();
1230 } else if (vt
->is_matrix()) {
1231 type
= vt
->column_type();
1232 } else if (vt
->is_vector()) {
1233 type
= vt
->get_base_type();
1238 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1241 assert(value
!= NULL
);
1243 this->ir_type
= ir_type_dereference_record
;
1244 this->record
= value
;
1245 this->field
= ralloc_strdup(this, field
);
1246 this->type
= this->record
->type
->field_type(field
);
1250 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1253 void *ctx
= ralloc_parent(var
);
1255 this->ir_type
= ir_type_dereference_record
;
1256 this->record
= new(ctx
) ir_dereference_variable(var
);
1257 this->field
= ralloc_strdup(this, field
);
1258 this->type
= this->record
->type
->field_type(field
);
1262 ir_dereference::is_lvalue() const
1264 ir_variable
*var
= this->variable_referenced();
1266 /* Every l-value derference chain eventually ends in a variable.
1268 if ((var
== NULL
) || var
->read_only
)
1271 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1273 * "Samplers cannot be treated as l-values; hence cannot be used
1274 * as out or inout function parameters, nor can they be
1277 if (this->type
->contains_sampler())
1284 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1286 const char *ir_texture::opcode_string()
1288 assert((unsigned int) op
<=
1289 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1290 return tex_opcode_strs
[op
];
1294 ir_texture::get_opcode(const char *str
)
1296 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1297 for (int op
= 0; op
< count
; op
++) {
1298 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1299 return (ir_texture_opcode
) op
;
1301 return (ir_texture_opcode
) -1;
1306 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1308 assert(sampler
!= NULL
);
1309 assert(type
!= NULL
);
1310 this->sampler
= sampler
;
1313 if (this->op
== ir_txs
) {
1314 assert(type
->base_type
== GLSL_TYPE_INT
);
1316 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1317 if (sampler
->type
->sampler_shadow
)
1318 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1320 assert(type
->vector_elements
== 4);
1326 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1328 assert((count
>= 1) && (count
<= 4));
1330 memset(&this->mask
, 0, sizeof(this->mask
));
1331 this->mask
.num_components
= count
;
1333 unsigned dup_mask
= 0;
1336 assert(comp
[3] <= 3);
1337 dup_mask
|= (1U << comp
[3])
1338 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1339 this->mask
.w
= comp
[3];
1342 assert(comp
[2] <= 3);
1343 dup_mask
|= (1U << comp
[2])
1344 & ((1U << comp
[0]) | (1U << comp
[1]));
1345 this->mask
.z
= comp
[2];
1348 assert(comp
[1] <= 3);
1349 dup_mask
|= (1U << comp
[1])
1350 & ((1U << comp
[0]));
1351 this->mask
.y
= comp
[1];
1354 assert(comp
[0] <= 3);
1355 this->mask
.x
= comp
[0];
1358 this->mask
.has_duplicates
= dup_mask
!= 0;
1360 /* Based on the number of elements in the swizzle and the base type
1361 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1362 * generate the type of the resulting value.
1364 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1367 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1368 unsigned w
, unsigned count
)
1371 const unsigned components
[4] = { x
, y
, z
, w
};
1372 this->ir_type
= ir_type_swizzle
;
1373 this->init_mask(components
, count
);
1376 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1380 this->ir_type
= ir_type_swizzle
;
1381 this->init_mask(comp
, count
);
1384 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1386 this->ir_type
= ir_type_swizzle
;
1389 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1390 mask
.num_components
, 1);
1399 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1401 void *ctx
= ralloc_parent(val
);
1403 /* For each possible swizzle character, this table encodes the value in
1404 * \c idx_map that represents the 0th element of the vector. For invalid
1405 * swizzle characters (e.g., 'k'), a special value is used that will allow
1406 * detection of errors.
1408 static const unsigned char base_idx
[26] = {
1409 /* a b c d e f g h i j k l m */
1410 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1411 /* n o p q r s t u v w x y z */
1412 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1415 /* Each valid swizzle character has an entry in the previous table. This
1416 * table encodes the base index encoded in the previous table plus the actual
1417 * index of the swizzle character. When processing swizzles, the first
1418 * character in the string is indexed in the previous table. Each character
1419 * in the string is indexed in this table, and the value found there has the
1420 * value form the first table subtracted. The result must be on the range
1423 * For example, the string "wzyx" will get X from the first table. Each of
1424 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1425 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1427 * The string "wzrg" will get X from the first table. Each of the characters
1428 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1429 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1430 * [0,3], the error is detected.
1432 static const unsigned char idx_map
[26] = {
1433 /* a b c d e f g h i j k l m */
1434 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1435 /* n o p q r s t u v w x y z */
1436 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1439 int swiz_idx
[4] = { 0, 0, 0, 0 };
1443 /* Validate the first character in the swizzle string and look up the base
1444 * index value as described above.
1446 if ((str
[0] < 'a') || (str
[0] > 'z'))
1449 const unsigned base
= base_idx
[str
[0] - 'a'];
1452 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1453 /* Validate the next character, and, as described above, convert it to a
1456 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1459 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1460 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1467 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1477 ir_swizzle::variable_referenced() const
1479 return this->val
->variable_referenced();
1483 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1484 ir_variable_mode mode
)
1485 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1486 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1488 this->ir_type
= ir_type_variable
;
1490 this->name
= ralloc_strdup(this, name
);
1491 this->explicit_location
= false;
1492 this->has_initializer
= false;
1493 this->location
= -1;
1494 this->uniform_block
= -1;
1495 this->warn_extension
= NULL
;
1496 this->constant_value
= NULL
;
1497 this->constant_initializer
= NULL
;
1498 this->origin_upper_left
= false;
1499 this->pixel_center_integer
= false;
1500 this->depth_layout
= ir_depth_layout_none
;
1503 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1504 this->read_only
= true;
1509 ir_variable::interpolation_string() const
1511 switch (this->interpolation
) {
1512 case INTERP_QUALIFIER_NONE
: return "no";
1513 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1514 case INTERP_QUALIFIER_FLAT
: return "flat";
1515 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1518 assert(!"Should not get here.");
1523 glsl_interp_qualifier
1524 ir_variable::determine_interpolation_mode(bool flat_shade
)
1526 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1527 return (glsl_interp_qualifier
) this->interpolation
;
1528 int location
= this->location
;
1530 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1531 if (flat_shade
&& is_gl_Color
)
1532 return INTERP_QUALIFIER_FLAT
;
1534 return INTERP_QUALIFIER_SMOOTH
;
1538 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1539 : return_type(return_type
), is_defined(false), _function(NULL
)
1541 this->ir_type
= ir_type_function_signature
;
1542 this->is_builtin
= false;
1543 this->origin
= NULL
;
1548 modes_match(unsigned a
, unsigned b
)
1553 /* Accept "in" vs. "const in" */
1554 if ((a
== ir_var_const_in
&& b
== ir_var_in
) ||
1555 (b
== ir_var_const_in
&& a
== ir_var_in
))
1563 ir_function_signature::qualifiers_match(exec_list
*params
)
1565 exec_list_iterator iter_a
= parameters
.iterator();
1566 exec_list_iterator iter_b
= params
->iterator();
1568 /* check that the qualifiers match. */
1569 while (iter_a
.has_next()) {
1570 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1571 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1573 if (a
->read_only
!= b
->read_only
||
1574 !modes_match(a
->mode
, b
->mode
) ||
1575 a
->interpolation
!= b
->interpolation
||
1576 a
->centroid
!= b
->centroid
) {
1578 /* parameter a's qualifiers don't match */
1590 ir_function_signature::replace_parameters(exec_list
*new_params
)
1592 /* Destroy all of the previous parameter information. If the previous
1593 * parameter information comes from the function prototype, it may either
1594 * specify incorrect parameter names or not have names at all.
1596 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1597 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1602 new_params
->move_nodes_to(¶meters
);
1606 ir_function::ir_function(const char *name
)
1608 this->ir_type
= ir_type_function
;
1609 this->name
= ralloc_strdup(this, name
);
1614 ir_function::has_user_signature()
1616 foreach_list(n
, &this->signatures
) {
1617 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1618 if (!sig
->is_builtin
)
1626 ir_rvalue::error_value(void *mem_ctx
)
1628 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1630 v
->type
= glsl_type::error_type
;
1636 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1638 foreach_iter(exec_list_iterator
, iter
, *list
) {
1639 ((ir_instruction
*)iter
.get())->accept(visitor
);
1645 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1647 ir_variable
*var
= ir
->as_variable();
1648 ir_constant
*constant
= ir
->as_constant();
1649 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1650 steal_memory(var
->constant_value
, ir
);
1652 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1653 steal_memory(var
->constant_initializer
, ir
);
1655 /* The components of aggregate constants are not visited by the normal
1656 * visitor, so steal their values by hand.
1658 if (constant
!= NULL
) {
1659 if (constant
->type
->is_record()) {
1660 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1661 ir_constant
*field
= (ir_constant
*)iter
.get();
1662 steal_memory(field
, ir
);
1664 } else if (constant
->type
->is_array()) {
1665 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1666 steal_memory(constant
->array_elements
[i
], ir
);
1671 ralloc_steal(new_ctx
, ir
);
1676 reparent_ir(exec_list
*list
, void *mem_ctx
)
1678 foreach_list(node
, list
) {
1679 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1685 try_min_one(ir_rvalue
*ir
)
1687 ir_expression
*expr
= ir
->as_expression();
1689 if (!expr
|| expr
->operation
!= ir_binop_min
)
1692 if (expr
->operands
[0]->is_one())
1693 return expr
->operands
[1];
1695 if (expr
->operands
[1]->is_one())
1696 return expr
->operands
[0];
1702 try_max_zero(ir_rvalue
*ir
)
1704 ir_expression
*expr
= ir
->as_expression();
1706 if (!expr
|| expr
->operation
!= ir_binop_max
)
1709 if (expr
->operands
[0]->is_zero())
1710 return expr
->operands
[1];
1712 if (expr
->operands
[1]->is_zero())
1713 return expr
->operands
[0];
1719 ir_rvalue::as_rvalue_to_saturate()
1721 ir_expression
*expr
= this->as_expression();
1726 ir_rvalue
*max_zero
= try_max_zero(expr
);
1728 return try_min_one(max_zero
);
1730 ir_rvalue
*min_one
= try_min_one(expr
);
1732 return try_max_zero(min_one
);