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
50 * Modify the swizzle make to move one component to another
52 * \param m IR swizzle to be modified
53 * \param from Component in the RHS that is to be swizzled
54 * \param to Desired swizzle location of \c from
57 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
60 case 0: m
.x
= from
; break;
61 case 1: m
.y
= from
; break;
62 case 2: m
.z
= from
; break;
63 case 3: m
.w
= from
; break;
64 default: assert(!"Should not get here.");
67 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
71 ir_assignment::set_lhs(ir_rvalue
*lhs
)
74 bool swizzled
= false;
77 ir_swizzle
*swiz
= lhs
->as_swizzle();
82 unsigned write_mask
= 0;
83 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
85 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
89 case 0: c
= swiz
->mask
.x
; break;
90 case 1: c
= swiz
->mask
.y
; break;
91 case 2: c
= swiz
->mask
.z
; break;
92 case 3: c
= swiz
->mask
.w
; break;
93 default: assert(!"Should not get here.");
96 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
97 update_rhs_swizzle(rhs_swiz
, i
, c
);
100 this->write_mask
= write_mask
;
103 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
108 /* Now, RHS channels line up with the LHS writemask. Collapse it
109 * to just the channels that will be written.
111 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
113 for (int i
= 0; i
< 4; i
++) {
114 if (write_mask
& (1 << i
))
115 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
117 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
120 assert((lhs
== NULL
) || lhs
->as_dereference());
122 this->lhs
= (ir_dereference
*) lhs
;
126 ir_assignment::whole_variable_written()
128 ir_variable
*v
= this->lhs
->whole_variable_referenced();
133 if (v
->type
->is_scalar())
136 if (v
->type
->is_vector()) {
137 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
139 if (mask
!= this->write_mask
)
143 /* Either all the vector components are assigned or the variable is some
144 * composite type (and the whole thing is assigned.
149 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
150 ir_rvalue
*condition
, unsigned write_mask
)
152 this->ir_type
= ir_type_assignment
;
153 this->condition
= condition
;
156 this->write_mask
= write_mask
;
158 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
159 int lhs_components
= 0;
160 for (int i
= 0; i
< 4; i
++) {
161 if (write_mask
& (1 << i
))
165 assert(lhs_components
== this->rhs
->type
->vector_elements
);
169 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
170 ir_rvalue
*condition
)
172 this->ir_type
= ir_type_assignment
;
173 this->condition
= condition
;
176 /* If the RHS is a vector type, assume that all components of the vector
177 * type are being written to the LHS. The write mask comes from the RHS
178 * because we can have a case where the LHS is a vec4 and the RHS is a
179 * vec3. In that case, the assignment is:
181 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
183 if (rhs
->type
->is_vector())
184 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
185 else if (rhs
->type
->is_scalar())
186 this->write_mask
= 1;
188 this->write_mask
= 0;
194 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
197 assert(get_num_operands(ir_expression_operation(op
)) == 1);
198 this->ir_type
= ir_type_expression
;
200 this->operation
= ir_expression_operation(op
);
201 this->operands
[0] = op0
;
202 this->operands
[1] = NULL
;
203 this->operands
[2] = NULL
;
204 this->operands
[3] = NULL
;
207 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
208 ir_rvalue
*op0
, ir_rvalue
*op1
)
210 assert(((op1
== NULL
) && (get_num_operands(ir_expression_operation(op
)) == 1))
211 || (get_num_operands(ir_expression_operation(op
)) == 2));
212 this->ir_type
= ir_type_expression
;
214 this->operation
= ir_expression_operation(op
);
215 this->operands
[0] = op0
;
216 this->operands
[1] = op1
;
217 this->operands
[2] = NULL
;
218 this->operands
[3] = NULL
;
221 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
222 ir_rvalue
*op0
, ir_rvalue
*op1
,
223 ir_rvalue
*op2
, ir_rvalue
*op3
)
225 this->ir_type
= ir_type_expression
;
227 this->operation
= ir_expression_operation(op
);
228 this->operands
[0] = op0
;
229 this->operands
[1] = op1
;
230 this->operands
[2] = op2
;
231 this->operands
[3] = op3
;
234 ir_expression::ir_expression(int op
, ir_rvalue
*op0
)
236 this->ir_type
= ir_type_expression
;
238 this->operation
= ir_expression_operation(op
);
239 this->operands
[0] = op0
;
240 this->operands
[1] = NULL
;
241 this->operands
[2] = NULL
;
242 this->operands
[3] = NULL
;
244 assert(op
<= ir_last_unop
);
246 switch (this->operation
) {
247 case ir_unop_bit_not
:
248 case ir_unop_logic_not
:
263 case ir_unop_round_even
:
266 case ir_unop_sin_reduced
:
267 case ir_unop_cos_reduced
:
270 this->type
= op0
->type
;
276 case ir_unop_bitcast_f2i
:
277 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
278 op0
->type
->vector_elements
, 1);
284 case ir_unop_bitcast_i2f
:
285 case ir_unop_bitcast_u2f
:
286 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
287 op0
->type
->vector_elements
, 1);
292 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
293 op0
->type
->vector_elements
, 1);
297 case ir_unop_bitcast_f2u
:
298 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
299 op0
->type
->vector_elements
, 1);
303 this->type
= glsl_type::float_type
;
307 this->type
= glsl_type::bool_type
;
311 assert(!"not reached: missing automatic type setup for ir_expression");
312 this->type
= op0
->type
;
317 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
319 this->ir_type
= ir_type_expression
;
321 this->operation
= ir_expression_operation(op
);
322 this->operands
[0] = op0
;
323 this->operands
[1] = op1
;
324 this->operands
[2] = NULL
;
325 this->operands
[3] = NULL
;
327 assert(op
> ir_last_unop
);
329 switch (this->operation
) {
330 case ir_binop_all_equal
:
331 case ir_binop_any_nequal
:
332 this->type
= glsl_type::bool_type
;
343 if (op0
->type
->is_scalar()) {
344 this->type
= op1
->type
;
345 } else if (op1
->type
->is_scalar()) {
346 this->type
= op0
->type
;
348 /* FINISHME: matrix types */
349 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
350 assert(op0
->type
== op1
->type
);
351 this->type
= op0
->type
;
355 case ir_binop_logic_and
:
356 case ir_binop_logic_xor
:
357 case ir_binop_logic_or
:
358 case ir_binop_bit_and
:
359 case ir_binop_bit_xor
:
360 case ir_binop_bit_or
:
361 if (op0
->type
->is_scalar()) {
362 this->type
= op1
->type
;
363 } else if (op1
->type
->is_scalar()) {
364 this->type
= op0
->type
;
369 case ir_binop_nequal
:
370 case ir_binop_lequal
:
371 case ir_binop_gequal
:
373 case ir_binop_greater
:
374 assert(op0
->type
== op1
->type
);
375 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
376 op0
->type
->vector_elements
, 1);
380 this->type
= glsl_type::float_type
;
383 case ir_binop_lshift
:
384 case ir_binop_rshift
:
385 this->type
= op0
->type
;
389 assert(!"not reached: missing automatic type setup for ir_expression");
390 this->type
= glsl_type::float_type
;
395 ir_expression::get_num_operands(ir_expression_operation op
)
397 assert(op
<= ir_last_opcode
);
399 if (op
<= ir_last_unop
)
402 if (op
<= ir_last_binop
)
405 if (op
== ir_quadop_vector
)
412 static const char *const operator_strs
[] = {
479 const char *ir_expression::operator_string(ir_expression_operation op
)
481 assert((unsigned int) op
< Elements(operator_strs
));
482 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
483 return operator_strs
[op
];
486 const char *ir_expression::operator_string()
488 return operator_string(this->operation
);
492 depth_layout_string(ir_depth_layout layout
)
495 case ir_depth_layout_none
: return "";
496 case ir_depth_layout_any
: return "depth_any";
497 case ir_depth_layout_greater
: return "depth_greater";
498 case ir_depth_layout_less
: return "depth_less";
499 case ir_depth_layout_unchanged
: return "depth_unchanged";
507 ir_expression_operation
508 ir_expression::get_operator(const char *str
)
510 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
511 for (int op
= 0; op
< operator_count
; op
++) {
512 if (strcmp(str
, operator_strs
[op
]) == 0)
513 return (ir_expression_operation
) op
;
515 return (ir_expression_operation
) -1;
518 ir_constant::ir_constant()
520 this->ir_type
= ir_type_constant
;
523 ir_constant::ir_constant(const struct glsl_type
*type
,
524 const ir_constant_data
*data
)
526 assert((type
->base_type
>= GLSL_TYPE_UINT
)
527 && (type
->base_type
<= GLSL_TYPE_BOOL
));
529 this->ir_type
= ir_type_constant
;
531 memcpy(& this->value
, data
, sizeof(this->value
));
534 ir_constant::ir_constant(float f
)
536 this->ir_type
= ir_type_constant
;
537 this->type
= glsl_type::float_type
;
538 this->value
.f
[0] = f
;
539 for (int i
= 1; i
< 16; i
++) {
540 this->value
.f
[i
] = 0;
544 ir_constant::ir_constant(unsigned int u
)
546 this->ir_type
= ir_type_constant
;
547 this->type
= glsl_type::uint_type
;
548 this->value
.u
[0] = u
;
549 for (int i
= 1; i
< 16; i
++) {
550 this->value
.u
[i
] = 0;
554 ir_constant::ir_constant(int i
)
556 this->ir_type
= ir_type_constant
;
557 this->type
= glsl_type::int_type
;
558 this->value
.i
[0] = i
;
559 for (int i
= 1; i
< 16; i
++) {
560 this->value
.i
[i
] = 0;
564 ir_constant::ir_constant(bool b
)
566 this->ir_type
= ir_type_constant
;
567 this->type
= glsl_type::bool_type
;
568 this->value
.b
[0] = b
;
569 for (int i
= 1; i
< 16; i
++) {
570 this->value
.b
[i
] = false;
574 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
576 this->ir_type
= ir_type_constant
;
577 this->type
= c
->type
->get_base_type();
579 switch (this->type
->base_type
) {
580 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
581 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
582 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
583 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
584 default: assert(!"Should not get here."); break;
588 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
590 this->ir_type
= ir_type_constant
;
593 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
594 || type
->is_record() || type
->is_array());
596 if (type
->is_array()) {
597 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
599 foreach_list(node
, value_list
) {
600 ir_constant
*value
= (ir_constant
*) node
;
601 assert(value
->as_constant() != NULL
);
603 this->array_elements
[i
++] = value
;
608 /* If the constant is a record, the types of each of the entries in
609 * value_list must be a 1-for-1 match with the structure components. Each
610 * entry must also be a constant. Just move the nodes from the value_list
611 * to the list in the ir_constant.
613 /* FINISHME: Should there be some type checking and / or assertions here? */
614 /* FINISHME: Should the new constant take ownership of the nodes from
615 * FINISHME: value_list, or should it make copies?
617 if (type
->is_record()) {
618 value_list
->move_nodes_to(& this->components
);
622 for (unsigned i
= 0; i
< 16; i
++) {
623 this->value
.u
[i
] = 0;
626 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
628 /* Constructors with exactly one scalar argument are special for vectors
629 * and matrices. For vectors, the scalar value is replicated to fill all
630 * the components. For matrices, the scalar fills the components of the
631 * diagonal while the rest is filled with 0.
633 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
634 if (type
->is_matrix()) {
635 /* Matrix - fill diagonal (rest is already set to 0) */
636 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
637 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
638 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
640 /* Vector or scalar - fill all components */
641 switch (type
->base_type
) {
644 for (unsigned i
= 0; i
< type
->components(); i
++)
645 this->value
.u
[i
] = value
->value
.u
[0];
647 case GLSL_TYPE_FLOAT
:
648 for (unsigned i
= 0; i
< type
->components(); i
++)
649 this->value
.f
[i
] = value
->value
.f
[0];
652 for (unsigned i
= 0; i
< type
->components(); i
++)
653 this->value
.b
[i
] = value
->value
.b
[0];
656 assert(!"Should not get here.");
663 if (type
->is_matrix() && value
->type
->is_matrix()) {
664 assert(value
->next
->is_tail_sentinel());
666 /* From section 5.4.2 of the GLSL 1.20 spec:
667 * "If a matrix is constructed from a matrix, then each component
668 * (column i, row j) in the result that has a corresponding component
669 * (column i, row j) in the argument will be initialized from there."
671 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
672 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
673 for (unsigned i
= 0; i
< cols
; i
++) {
674 for (unsigned j
= 0; j
< rows
; j
++) {
675 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
676 const unsigned dst
= i
* type
->vector_elements
+ j
;
677 this->value
.f
[dst
] = value
->value
.f
[src
];
681 /* "All other components will be initialized to the identity matrix." */
682 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
683 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
688 /* Use each component from each entry in the value_list to initialize one
689 * component of the constant being constructed.
691 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
692 assert(value
->as_constant() != NULL
);
693 assert(!value
->is_tail_sentinel());
695 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
696 switch (type
->base_type
) {
698 this->value
.u
[i
] = value
->get_uint_component(j
);
701 this->value
.i
[i
] = value
->get_int_component(j
);
703 case GLSL_TYPE_FLOAT
:
704 this->value
.f
[i
] = value
->get_float_component(j
);
707 this->value
.b
[i
] = value
->get_bool_component(j
);
710 /* FINISHME: What to do? Exceptions are not the answer.
716 if (i
>= type
->components())
720 value
= (ir_constant
*) value
->next
;
725 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
727 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
728 || type
->is_record() || type
->is_array());
730 ir_constant
*c
= new(mem_ctx
) ir_constant
;
732 memset(&c
->value
, 0, sizeof(c
->value
));
734 if (type
->is_array()) {
735 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
737 for (unsigned i
= 0; i
< type
->length
; i
++)
738 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
741 if (type
->is_record()) {
742 for (unsigned i
= 0; i
< type
->length
; i
++) {
743 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
744 c
->components
.push_tail(comp
);
752 ir_constant::get_bool_component(unsigned i
) const
754 switch (this->type
->base_type
) {
755 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
756 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
757 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
758 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
759 default: assert(!"Should not get here."); break;
762 /* Must return something to make the compiler happy. This is clearly an
769 ir_constant::get_float_component(unsigned i
) const
771 switch (this->type
->base_type
) {
772 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
773 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
774 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
775 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
776 default: assert(!"Should not get here."); break;
779 /* Must return something to make the compiler happy. This is clearly an
786 ir_constant::get_int_component(unsigned i
) const
788 switch (this->type
->base_type
) {
789 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
790 case GLSL_TYPE_INT
: return this->value
.i
[i
];
791 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
792 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
793 default: assert(!"Should not get here."); break;
796 /* Must return something to make the compiler happy. This is clearly an
803 ir_constant::get_uint_component(unsigned i
) const
805 switch (this->type
->base_type
) {
806 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
807 case GLSL_TYPE_INT
: return this->value
.i
[i
];
808 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
809 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
810 default: assert(!"Should not get here."); break;
813 /* Must return something to make the compiler happy. This is clearly an
820 ir_constant::get_array_element(unsigned i
) const
822 assert(this->type
->is_array());
824 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
826 * "Behavior is undefined if a shader subscripts an array with an index
827 * less than 0 or greater than or equal to the size the array was
830 * Most out-of-bounds accesses are removed before things could get this far.
831 * There are cases where non-constant array index values can get constant
836 else if (i
>= this->type
->length
)
837 i
= this->type
->length
- 1;
839 return array_elements
[i
];
843 ir_constant::get_record_field(const char *name
)
845 int idx
= this->type
->field_index(name
);
850 if (this->components
.is_empty())
853 exec_node
*node
= this->components
.head
;
854 for (int i
= 0; i
< idx
; i
++) {
857 /* If the end of the list is encountered before the element matching the
858 * requested field is found, return NULL.
860 if (node
->is_tail_sentinel())
864 return (ir_constant
*) node
;
868 ir_constant::copy_offset(ir_constant
*src
, int offset
)
870 switch (this->type
->base_type
) {
873 case GLSL_TYPE_FLOAT
:
874 case GLSL_TYPE_BOOL
: {
875 unsigned int size
= src
->type
->components();
876 assert (size
<= this->type
->components() - offset
);
877 for (unsigned int i
=0; i
<size
; i
++) {
878 switch (this->type
->base_type
) {
880 value
.u
[i
+offset
] = src
->get_uint_component(i
);
883 value
.i
[i
+offset
] = src
->get_int_component(i
);
885 case GLSL_TYPE_FLOAT
:
886 value
.f
[i
+offset
] = src
->get_float_component(i
);
889 value
.b
[i
+offset
] = src
->get_bool_component(i
);
891 default: // Shut up the compiler
898 case GLSL_TYPE_STRUCT
: {
899 assert (src
->type
== this->type
);
900 this->components
.make_empty();
901 foreach_list(node
, &src
->components
) {
902 ir_constant
*const orig
= (ir_constant
*) node
;
904 this->components
.push_tail(orig
->clone(this, NULL
));
909 case GLSL_TYPE_ARRAY
: {
910 assert (src
->type
== this->type
);
911 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
912 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
918 assert(!"Should not get here.");
924 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
926 assert (!type
->is_array() && !type
->is_record());
928 if (!type
->is_vector() && !type
->is_matrix()) {
934 for (int i
=0; i
<4; i
++) {
935 if (mask
& (1 << i
)) {
936 switch (this->type
->base_type
) {
938 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
941 value
.i
[i
+offset
] = src
->get_int_component(id
++);
943 case GLSL_TYPE_FLOAT
:
944 value
.f
[i
+offset
] = src
->get_float_component(id
++);
947 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
950 assert(!"Should not get here.");
958 ir_constant::has_value(const ir_constant
*c
) const
960 if (this->type
!= c
->type
)
963 if (this->type
->is_array()) {
964 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
965 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
971 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
972 const exec_node
*a_node
= this->components
.head
;
973 const exec_node
*b_node
= c
->components
.head
;
975 while (!a_node
->is_tail_sentinel()) {
976 assert(!b_node
->is_tail_sentinel());
978 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
979 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
981 if (!a_field
->has_value(b_field
))
984 a_node
= a_node
->next
;
985 b_node
= b_node
->next
;
991 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
992 switch (this->type
->base_type
) {
994 if (this->value
.u
[i
] != c
->value
.u
[i
])
998 if (this->value
.i
[i
] != c
->value
.i
[i
])
1001 case GLSL_TYPE_FLOAT
:
1002 if (this->value
.f
[i
] != c
->value
.f
[i
])
1005 case GLSL_TYPE_BOOL
:
1006 if (this->value
.b
[i
] != c
->value
.b
[i
])
1010 assert(!"Should not get here.");
1019 ir_constant::is_zero() const
1021 if (!this->type
->is_scalar() && !this->type
->is_vector())
1024 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1025 switch (this->type
->base_type
) {
1026 case GLSL_TYPE_FLOAT
:
1027 if (this->value
.f
[c
] != 0.0)
1031 if (this->value
.i
[c
] != 0)
1034 case GLSL_TYPE_UINT
:
1035 if (this->value
.u
[c
] != 0)
1038 case GLSL_TYPE_BOOL
:
1039 if (this->value
.b
[c
] != false)
1043 /* The only other base types are structures, arrays, and samplers.
1044 * Samplers cannot be constants, and the others should have been
1045 * filtered out above.
1047 assert(!"Should not get here.");
1056 ir_constant::is_one() const
1058 if (!this->type
->is_scalar() && !this->type
->is_vector())
1061 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1062 switch (this->type
->base_type
) {
1063 case GLSL_TYPE_FLOAT
:
1064 if (this->value
.f
[c
] != 1.0)
1068 if (this->value
.i
[c
] != 1)
1071 case GLSL_TYPE_UINT
:
1072 if (this->value
.u
[c
] != 1)
1075 case GLSL_TYPE_BOOL
:
1076 if (this->value
.b
[c
] != true)
1080 /* The only other base types are structures, arrays, and samplers.
1081 * Samplers cannot be constants, and the others should have been
1082 * filtered out above.
1084 assert(!"Should not get here.");
1093 ir_constant::is_negative_one() const
1095 if (!this->type
->is_scalar() && !this->type
->is_vector())
1098 if (this->type
->is_boolean())
1101 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1102 switch (this->type
->base_type
) {
1103 case GLSL_TYPE_FLOAT
:
1104 if (this->value
.f
[c
] != -1.0)
1108 if (this->value
.i
[c
] != -1)
1111 case GLSL_TYPE_UINT
:
1112 if (int(this->value
.u
[c
]) != -1)
1116 /* The only other base types are structures, arrays, samplers, and
1117 * booleans. Samplers cannot be constants, and the others should
1118 * have been filtered out above.
1120 assert(!"Should not get here.");
1130 this->ir_type
= ir_type_loop
;
1131 this->cmp
= ir_unop_neg
;
1134 this->increment
= NULL
;
1135 this->counter
= NULL
;
1139 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1141 assert(var
!= NULL
);
1143 this->ir_type
= ir_type_dereference_variable
;
1145 this->type
= var
->type
;
1149 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1150 ir_rvalue
*array_index
)
1152 this->ir_type
= ir_type_dereference_array
;
1153 this->array_index
= array_index
;
1154 this->set_array(value
);
1158 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1159 ir_rvalue
*array_index
)
1161 void *ctx
= ralloc_parent(var
);
1163 this->ir_type
= ir_type_dereference_array
;
1164 this->array_index
= array_index
;
1165 this->set_array(new(ctx
) ir_dereference_variable(var
));
1170 ir_dereference_array::set_array(ir_rvalue
*value
)
1172 assert(value
!= NULL
);
1174 this->array
= value
;
1176 const glsl_type
*const vt
= this->array
->type
;
1178 if (vt
->is_array()) {
1179 type
= vt
->element_type();
1180 } else if (vt
->is_matrix()) {
1181 type
= vt
->column_type();
1182 } else if (vt
->is_vector()) {
1183 type
= vt
->get_base_type();
1188 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1191 assert(value
!= NULL
);
1193 this->ir_type
= ir_type_dereference_record
;
1194 this->record
= value
;
1195 this->field
= ralloc_strdup(this, field
);
1196 this->type
= this->record
->type
->field_type(field
);
1200 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1203 void *ctx
= ralloc_parent(var
);
1205 this->ir_type
= ir_type_dereference_record
;
1206 this->record
= new(ctx
) ir_dereference_variable(var
);
1207 this->field
= ralloc_strdup(this, field
);
1208 this->type
= this->record
->type
->field_type(field
);
1212 ir_dereference::is_lvalue() const
1214 ir_variable
*var
= this->variable_referenced();
1216 /* Every l-value derference chain eventually ends in a variable.
1218 if ((var
== NULL
) || var
->read_only
)
1221 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1223 * "Samplers cannot be treated as l-values; hence cannot be used
1224 * as out or inout function parameters, nor can they be
1227 if (this->type
->contains_sampler())
1234 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1236 const char *ir_texture::opcode_string()
1238 assert((unsigned int) op
<=
1239 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1240 return tex_opcode_strs
[op
];
1244 ir_texture::get_opcode(const char *str
)
1246 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1247 for (int op
= 0; op
< count
; op
++) {
1248 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1249 return (ir_texture_opcode
) op
;
1251 return (ir_texture_opcode
) -1;
1256 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1258 assert(sampler
!= NULL
);
1259 assert(type
!= NULL
);
1260 this->sampler
= sampler
;
1263 if (this->op
== ir_txs
) {
1264 assert(type
->base_type
== GLSL_TYPE_INT
);
1266 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1267 if (sampler
->type
->sampler_shadow
)
1268 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1270 assert(type
->vector_elements
== 4);
1276 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1278 assert((count
>= 1) && (count
<= 4));
1280 memset(&this->mask
, 0, sizeof(this->mask
));
1281 this->mask
.num_components
= count
;
1283 unsigned dup_mask
= 0;
1286 assert(comp
[3] <= 3);
1287 dup_mask
|= (1U << comp
[3])
1288 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1289 this->mask
.w
= comp
[3];
1292 assert(comp
[2] <= 3);
1293 dup_mask
|= (1U << comp
[2])
1294 & ((1U << comp
[0]) | (1U << comp
[1]));
1295 this->mask
.z
= comp
[2];
1298 assert(comp
[1] <= 3);
1299 dup_mask
|= (1U << comp
[1])
1300 & ((1U << comp
[0]));
1301 this->mask
.y
= comp
[1];
1304 assert(comp
[0] <= 3);
1305 this->mask
.x
= comp
[0];
1308 this->mask
.has_duplicates
= dup_mask
!= 0;
1310 /* Based on the number of elements in the swizzle and the base type
1311 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1312 * generate the type of the resulting value.
1314 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1317 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1318 unsigned w
, unsigned count
)
1321 const unsigned components
[4] = { x
, y
, z
, w
};
1322 this->ir_type
= ir_type_swizzle
;
1323 this->init_mask(components
, count
);
1326 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1330 this->ir_type
= ir_type_swizzle
;
1331 this->init_mask(comp
, count
);
1334 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1336 this->ir_type
= ir_type_swizzle
;
1339 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1340 mask
.num_components
, 1);
1349 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1351 void *ctx
= ralloc_parent(val
);
1353 /* For each possible swizzle character, this table encodes the value in
1354 * \c idx_map that represents the 0th element of the vector. For invalid
1355 * swizzle characters (e.g., 'k'), a special value is used that will allow
1356 * detection of errors.
1358 static const unsigned char base_idx
[26] = {
1359 /* a b c d e f g h i j k l m */
1360 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1361 /* n o p q r s t u v w x y z */
1362 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1365 /* Each valid swizzle character has an entry in the previous table. This
1366 * table encodes the base index encoded in the previous table plus the actual
1367 * index of the swizzle character. When processing swizzles, the first
1368 * character in the string is indexed in the previous table. Each character
1369 * in the string is indexed in this table, and the value found there has the
1370 * value form the first table subtracted. The result must be on the range
1373 * For example, the string "wzyx" will get X from the first table. Each of
1374 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1375 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1377 * The string "wzrg" will get X from the first table. Each of the characters
1378 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1379 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1380 * [0,3], the error is detected.
1382 static const unsigned char idx_map
[26] = {
1383 /* a b c d e f g h i j k l m */
1384 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1385 /* n o p q r s t u v w x y z */
1386 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1389 int swiz_idx
[4] = { 0, 0, 0, 0 };
1393 /* Validate the first character in the swizzle string and look up the base
1394 * index value as described above.
1396 if ((str
[0] < 'a') || (str
[0] > 'z'))
1399 const unsigned base
= base_idx
[str
[0] - 'a'];
1402 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1403 /* Validate the next character, and, as described above, convert it to a
1406 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1409 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1410 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1417 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1427 ir_swizzle::variable_referenced() const
1429 return this->val
->variable_referenced();
1433 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1434 ir_variable_mode mode
)
1435 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1436 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1438 this->ir_type
= ir_type_variable
;
1440 this->name
= ralloc_strdup(this, name
);
1441 this->explicit_location
= false;
1442 this->has_initializer
= false;
1443 this->location
= -1;
1444 this->warn_extension
= NULL
;
1445 this->constant_value
= NULL
;
1446 this->constant_initializer
= NULL
;
1447 this->origin_upper_left
= false;
1448 this->pixel_center_integer
= false;
1449 this->depth_layout
= ir_depth_layout_none
;
1452 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1453 this->read_only
= true;
1458 ir_variable::interpolation_string() const
1460 switch (this->interpolation
) {
1461 case INTERP_QUALIFIER_NONE
: return "no";
1462 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1463 case INTERP_QUALIFIER_FLAT
: return "flat";
1464 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1467 assert(!"Should not get here.");
1472 glsl_interp_qualifier
1473 ir_variable::determine_interpolation_mode(bool flat_shade
)
1475 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1476 return (glsl_interp_qualifier
) this->interpolation
;
1477 int location
= this->location
;
1479 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1480 if (flat_shade
&& is_gl_Color
)
1481 return INTERP_QUALIFIER_FLAT
;
1483 return INTERP_QUALIFIER_SMOOTH
;
1487 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1488 : return_type(return_type
), is_defined(false), _function(NULL
)
1490 this->ir_type
= ir_type_function_signature
;
1491 this->is_builtin
= false;
1492 this->origin
= NULL
;
1497 modes_match(unsigned a
, unsigned b
)
1502 /* Accept "in" vs. "const in" */
1503 if ((a
== ir_var_const_in
&& b
== ir_var_in
) ||
1504 (b
== ir_var_const_in
&& a
== ir_var_in
))
1512 ir_function_signature::qualifiers_match(exec_list
*params
)
1514 exec_list_iterator iter_a
= parameters
.iterator();
1515 exec_list_iterator iter_b
= params
->iterator();
1517 /* check that the qualifiers match. */
1518 while (iter_a
.has_next()) {
1519 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1520 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1522 if (a
->read_only
!= b
->read_only
||
1523 !modes_match(a
->mode
, b
->mode
) ||
1524 a
->interpolation
!= b
->interpolation
||
1525 a
->centroid
!= b
->centroid
) {
1527 /* parameter a's qualifiers don't match */
1539 ir_function_signature::replace_parameters(exec_list
*new_params
)
1541 /* Destroy all of the previous parameter information. If the previous
1542 * parameter information comes from the function prototype, it may either
1543 * specify incorrect parameter names or not have names at all.
1545 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1546 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1551 new_params
->move_nodes_to(¶meters
);
1555 ir_function::ir_function(const char *name
)
1557 this->ir_type
= ir_type_function
;
1558 this->name
= ralloc_strdup(this, name
);
1563 ir_function::has_user_signature()
1565 foreach_list(n
, &this->signatures
) {
1566 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1567 if (!sig
->is_builtin
)
1575 ir_rvalue::error_value(void *mem_ctx
)
1577 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1579 v
->type
= glsl_type::error_type
;
1585 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1587 foreach_iter(exec_list_iterator
, iter
, *list
) {
1588 ((ir_instruction
*)iter
.get())->accept(visitor
);
1594 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1596 ir_variable
*var
= ir
->as_variable();
1597 ir_constant
*constant
= ir
->as_constant();
1598 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1599 steal_memory(var
->constant_value
, ir
);
1601 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1602 steal_memory(var
->constant_initializer
, ir
);
1604 /* The components of aggregate constants are not visited by the normal
1605 * visitor, so steal their values by hand.
1607 if (constant
!= NULL
) {
1608 if (constant
->type
->is_record()) {
1609 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1610 ir_constant
*field
= (ir_constant
*)iter
.get();
1611 steal_memory(field
, ir
);
1613 } else if (constant
->type
->is_array()) {
1614 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1615 steal_memory(constant
->array_elements
[i
], ir
);
1620 ralloc_steal(new_ctx
, ir
);
1625 reparent_ir(exec_list
*list
, void *mem_ctx
)
1627 foreach_list(node
, list
) {
1628 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1634 try_min_one(ir_rvalue
*ir
)
1636 ir_expression
*expr
= ir
->as_expression();
1638 if (!expr
|| expr
->operation
!= ir_binop_min
)
1641 if (expr
->operands
[0]->is_one())
1642 return expr
->operands
[1];
1644 if (expr
->operands
[1]->is_one())
1645 return expr
->operands
[0];
1651 try_max_zero(ir_rvalue
*ir
)
1653 ir_expression
*expr
= ir
->as_expression();
1655 if (!expr
|| expr
->operation
!= ir_binop_max
)
1658 if (expr
->operands
[0]->is_zero())
1659 return expr
->operands
[1];
1661 if (expr
->operands
[1]->is_zero())
1662 return expr
->operands
[0];
1668 ir_rvalue::as_rvalue_to_saturate()
1670 ir_expression
*expr
= this->as_expression();
1675 ir_rvalue
*max_zero
= try_max_zero(expr
);
1677 return try_min_one(max_zero
);
1679 ir_rvalue
*min_one
= try_min_one(expr
);
1681 return try_max_zero(min_one
);