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 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
277 op0
->type
->vector_elements
, 1);
283 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
284 op0
->type
->vector_elements
, 1);
289 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
290 op0
->type
->vector_elements
, 1);
294 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
295 op0
->type
->vector_elements
, 1);
299 this->type
= glsl_type::float_type
;
303 this->type
= glsl_type::bool_type
;
307 assert(!"not reached: missing automatic type setup for ir_expression");
308 this->type
= op0
->type
;
313 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
315 this->ir_type
= ir_type_expression
;
317 this->operation
= ir_expression_operation(op
);
318 this->operands
[0] = op0
;
319 this->operands
[1] = op1
;
320 this->operands
[2] = NULL
;
321 this->operands
[3] = NULL
;
323 assert(op
> ir_last_unop
);
325 switch (this->operation
) {
326 case ir_binop_all_equal
:
327 case ir_binop_any_nequal
:
328 this->type
= glsl_type::bool_type
;
339 if (op0
->type
->is_scalar()) {
340 this->type
= op1
->type
;
341 } else if (op1
->type
->is_scalar()) {
342 this->type
= op0
->type
;
344 /* FINISHME: matrix types */
345 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
346 assert(op0
->type
== op1
->type
);
347 this->type
= op0
->type
;
351 case ir_binop_logic_and
:
352 case ir_binop_logic_xor
:
353 case ir_binop_logic_or
:
354 case ir_binop_bit_and
:
355 case ir_binop_bit_xor
:
356 case ir_binop_bit_or
:
357 if (op0
->type
->is_scalar()) {
358 this->type
= op1
->type
;
359 } else if (op1
->type
->is_scalar()) {
360 this->type
= op0
->type
;
365 case ir_binop_nequal
:
366 case ir_binop_lequal
:
367 case ir_binop_gequal
:
369 case ir_binop_greater
:
370 assert(op0
->type
== op1
->type
);
371 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
372 op0
->type
->vector_elements
, 1);
376 this->type
= glsl_type::float_type
;
379 case ir_binop_lshift
:
380 case ir_binop_rshift
:
381 this->type
= op0
->type
;
385 assert(!"not reached: missing automatic type setup for ir_expression");
386 this->type
= glsl_type::float_type
;
391 ir_expression::get_num_operands(ir_expression_operation op
)
393 assert(op
<= ir_last_opcode
);
395 if (op
<= ir_last_unop
)
398 if (op
<= ir_last_binop
)
401 if (op
== ir_quadop_vector
)
408 static const char *const operator_strs
[] = {
471 const char *ir_expression::operator_string(ir_expression_operation op
)
473 assert((unsigned int) op
< Elements(operator_strs
));
474 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
475 return operator_strs
[op
];
478 const char *ir_expression::operator_string()
480 return operator_string(this->operation
);
484 depth_layout_string(ir_depth_layout layout
)
487 case ir_depth_layout_none
: return "";
488 case ir_depth_layout_any
: return "depth_any";
489 case ir_depth_layout_greater
: return "depth_greater";
490 case ir_depth_layout_less
: return "depth_less";
491 case ir_depth_layout_unchanged
: return "depth_unchanged";
499 ir_expression_operation
500 ir_expression::get_operator(const char *str
)
502 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
503 for (int op
= 0; op
< operator_count
; op
++) {
504 if (strcmp(str
, operator_strs
[op
]) == 0)
505 return (ir_expression_operation
) op
;
507 return (ir_expression_operation
) -1;
510 ir_constant::ir_constant()
512 this->ir_type
= ir_type_constant
;
515 ir_constant::ir_constant(const struct glsl_type
*type
,
516 const ir_constant_data
*data
)
518 assert((type
->base_type
>= GLSL_TYPE_UINT
)
519 && (type
->base_type
<= GLSL_TYPE_BOOL
));
521 this->ir_type
= ir_type_constant
;
523 memcpy(& this->value
, data
, sizeof(this->value
));
526 ir_constant::ir_constant(float f
)
528 this->ir_type
= ir_type_constant
;
529 this->type
= glsl_type::float_type
;
530 this->value
.f
[0] = f
;
531 for (int i
= 1; i
< 16; i
++) {
532 this->value
.f
[i
] = 0;
536 ir_constant::ir_constant(unsigned int u
)
538 this->ir_type
= ir_type_constant
;
539 this->type
= glsl_type::uint_type
;
540 this->value
.u
[0] = u
;
541 for (int i
= 1; i
< 16; i
++) {
542 this->value
.u
[i
] = 0;
546 ir_constant::ir_constant(int i
)
548 this->ir_type
= ir_type_constant
;
549 this->type
= glsl_type::int_type
;
550 this->value
.i
[0] = i
;
551 for (int i
= 1; i
< 16; i
++) {
552 this->value
.i
[i
] = 0;
556 ir_constant::ir_constant(bool b
)
558 this->ir_type
= ir_type_constant
;
559 this->type
= glsl_type::bool_type
;
560 this->value
.b
[0] = b
;
561 for (int i
= 1; i
< 16; i
++) {
562 this->value
.b
[i
] = false;
566 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
568 this->ir_type
= ir_type_constant
;
569 this->type
= c
->type
->get_base_type();
571 switch (this->type
->base_type
) {
572 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
573 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
574 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
575 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
576 default: assert(!"Should not get here."); break;
580 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
582 this->ir_type
= ir_type_constant
;
585 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
586 || type
->is_record() || type
->is_array());
588 if (type
->is_array()) {
589 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
591 foreach_list(node
, value_list
) {
592 ir_constant
*value
= (ir_constant
*) node
;
593 assert(value
->as_constant() != NULL
);
595 this->array_elements
[i
++] = value
;
600 /* If the constant is a record, the types of each of the entries in
601 * value_list must be a 1-for-1 match with the structure components. Each
602 * entry must also be a constant. Just move the nodes from the value_list
603 * to the list in the ir_constant.
605 /* FINISHME: Should there be some type checking and / or assertions here? */
606 /* FINISHME: Should the new constant take ownership of the nodes from
607 * FINISHME: value_list, or should it make copies?
609 if (type
->is_record()) {
610 value_list
->move_nodes_to(& this->components
);
614 for (unsigned i
= 0; i
< 16; i
++) {
615 this->value
.u
[i
] = 0;
618 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
620 /* Constructors with exactly one scalar argument are special for vectors
621 * and matrices. For vectors, the scalar value is replicated to fill all
622 * the components. For matrices, the scalar fills the components of the
623 * diagonal while the rest is filled with 0.
625 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
626 if (type
->is_matrix()) {
627 /* Matrix - fill diagonal (rest is already set to 0) */
628 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
629 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
630 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
632 /* Vector or scalar - fill all components */
633 switch (type
->base_type
) {
636 for (unsigned i
= 0; i
< type
->components(); i
++)
637 this->value
.u
[i
] = value
->value
.u
[0];
639 case GLSL_TYPE_FLOAT
:
640 for (unsigned i
= 0; i
< type
->components(); i
++)
641 this->value
.f
[i
] = value
->value
.f
[0];
644 for (unsigned i
= 0; i
< type
->components(); i
++)
645 this->value
.b
[i
] = value
->value
.b
[0];
648 assert(!"Should not get here.");
655 if (type
->is_matrix() && value
->type
->is_matrix()) {
656 assert(value
->next
->is_tail_sentinel());
658 /* From section 5.4.2 of the GLSL 1.20 spec:
659 * "If a matrix is constructed from a matrix, then each component
660 * (column i, row j) in the result that has a corresponding component
661 * (column i, row j) in the argument will be initialized from there."
663 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
664 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
665 for (unsigned i
= 0; i
< cols
; i
++) {
666 for (unsigned j
= 0; j
< rows
; j
++) {
667 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
668 const unsigned dst
= i
* type
->vector_elements
+ j
;
669 this->value
.f
[dst
] = value
->value
.f
[src
];
673 /* "All other components will be initialized to the identity matrix." */
674 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
675 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
680 /* Use each component from each entry in the value_list to initialize one
681 * component of the constant being constructed.
683 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
684 assert(value
->as_constant() != NULL
);
685 assert(!value
->is_tail_sentinel());
687 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
688 switch (type
->base_type
) {
690 this->value
.u
[i
] = value
->get_uint_component(j
);
693 this->value
.i
[i
] = value
->get_int_component(j
);
695 case GLSL_TYPE_FLOAT
:
696 this->value
.f
[i
] = value
->get_float_component(j
);
699 this->value
.b
[i
] = value
->get_bool_component(j
);
702 /* FINISHME: What to do? Exceptions are not the answer.
708 if (i
>= type
->components())
712 value
= (ir_constant
*) value
->next
;
717 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
719 assert(type
->is_numeric() || type
->is_boolean());
721 ir_constant
*c
= new(mem_ctx
) ir_constant
;
723 memset(&c
->value
, 0, sizeof(c
->value
));
729 ir_constant::get_bool_component(unsigned i
) const
731 switch (this->type
->base_type
) {
732 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
733 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
734 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
735 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
736 default: assert(!"Should not get here."); break;
739 /* Must return something to make the compiler happy. This is clearly an
746 ir_constant::get_float_component(unsigned i
) const
748 switch (this->type
->base_type
) {
749 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
750 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
751 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
752 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0 : 0.0;
753 default: assert(!"Should not get here."); break;
756 /* Must return something to make the compiler happy. This is clearly an
763 ir_constant::get_int_component(unsigned i
) const
765 switch (this->type
->base_type
) {
766 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
767 case GLSL_TYPE_INT
: return this->value
.i
[i
];
768 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
769 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
770 default: assert(!"Should not get here."); break;
773 /* Must return something to make the compiler happy. This is clearly an
780 ir_constant::get_uint_component(unsigned i
) const
782 switch (this->type
->base_type
) {
783 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
784 case GLSL_TYPE_INT
: return this->value
.i
[i
];
785 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
786 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
787 default: assert(!"Should not get here."); break;
790 /* Must return something to make the compiler happy. This is clearly an
797 ir_constant::get_array_element(unsigned i
) const
799 assert(this->type
->is_array());
801 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
803 * "Behavior is undefined if a shader subscripts an array with an index
804 * less than 0 or greater than or equal to the size the array was
807 * Most out-of-bounds accesses are removed before things could get this far.
808 * There are cases where non-constant array index values can get constant
813 else if (i
>= this->type
->length
)
814 i
= this->type
->length
- 1;
816 return array_elements
[i
];
820 ir_constant::get_record_field(const char *name
)
822 int idx
= this->type
->field_index(name
);
827 if (this->components
.is_empty())
830 exec_node
*node
= this->components
.head
;
831 for (int i
= 0; i
< idx
; i
++) {
834 /* If the end of the list is encountered before the element matching the
835 * requested field is found, return NULL.
837 if (node
->is_tail_sentinel())
841 return (ir_constant
*) node
;
846 ir_constant::has_value(const ir_constant
*c
) const
848 if (this->type
!= c
->type
)
851 if (this->type
->is_array()) {
852 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
853 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
859 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
860 const exec_node
*a_node
= this->components
.head
;
861 const exec_node
*b_node
= c
->components
.head
;
863 while (!a_node
->is_tail_sentinel()) {
864 assert(!b_node
->is_tail_sentinel());
866 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
867 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
869 if (!a_field
->has_value(b_field
))
872 a_node
= a_node
->next
;
873 b_node
= b_node
->next
;
879 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
880 switch (this->type
->base_type
) {
882 if (this->value
.u
[i
] != c
->value
.u
[i
])
886 if (this->value
.i
[i
] != c
->value
.i
[i
])
889 case GLSL_TYPE_FLOAT
:
890 if (this->value
.f
[i
] != c
->value
.f
[i
])
894 if (this->value
.b
[i
] != c
->value
.b
[i
])
898 assert(!"Should not get here.");
907 ir_constant::is_zero() const
909 if (!this->type
->is_scalar() && !this->type
->is_vector())
912 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
913 switch (this->type
->base_type
) {
914 case GLSL_TYPE_FLOAT
:
915 if (this->value
.f
[c
] != 0.0)
919 if (this->value
.i
[c
] != 0)
923 if (this->value
.u
[c
] != 0)
927 if (this->value
.b
[c
] != false)
931 /* The only other base types are structures, arrays, and samplers.
932 * Samplers cannot be constants, and the others should have been
933 * filtered out above.
935 assert(!"Should not get here.");
944 ir_constant::is_one() const
946 if (!this->type
->is_scalar() && !this->type
->is_vector())
949 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
950 switch (this->type
->base_type
) {
951 case GLSL_TYPE_FLOAT
:
952 if (this->value
.f
[c
] != 1.0)
956 if (this->value
.i
[c
] != 1)
960 if (this->value
.u
[c
] != 1)
964 if (this->value
.b
[c
] != true)
968 /* The only other base types are structures, arrays, and samplers.
969 * Samplers cannot be constants, and the others should have been
970 * filtered out above.
972 assert(!"Should not get here.");
981 ir_constant::is_negative_one() const
983 if (!this->type
->is_scalar() && !this->type
->is_vector())
986 if (this->type
->is_boolean())
989 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
990 switch (this->type
->base_type
) {
991 case GLSL_TYPE_FLOAT
:
992 if (this->value
.f
[c
] != -1.0)
996 if (this->value
.i
[c
] != -1)
1000 if (int(this->value
.u
[c
]) != -1)
1004 /* The only other base types are structures, arrays, samplers, and
1005 * booleans. Samplers cannot be constants, and the others should
1006 * have been filtered out above.
1008 assert(!"Should not get here.");
1018 this->ir_type
= ir_type_loop
;
1019 this->cmp
= ir_unop_neg
;
1022 this->increment
= NULL
;
1023 this->counter
= NULL
;
1027 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1029 this->ir_type
= ir_type_dereference_variable
;
1031 this->type
= (var
!= NULL
) ? var
->type
: glsl_type::error_type
;
1035 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1036 ir_rvalue
*array_index
)
1038 this->ir_type
= ir_type_dereference_array
;
1039 this->array_index
= array_index
;
1040 this->set_array(value
);
1044 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1045 ir_rvalue
*array_index
)
1047 void *ctx
= ralloc_parent(var
);
1049 this->ir_type
= ir_type_dereference_array
;
1050 this->array_index
= array_index
;
1051 this->set_array(new(ctx
) ir_dereference_variable(var
));
1056 ir_dereference_array::set_array(ir_rvalue
*value
)
1058 assert(value
!= NULL
);
1060 this->array
= value
;
1062 const glsl_type
*const vt
= this->array
->type
;
1064 if (vt
->is_array()) {
1065 type
= vt
->element_type();
1066 } else if (vt
->is_matrix()) {
1067 type
= vt
->column_type();
1068 } else if (vt
->is_vector()) {
1069 type
= vt
->get_base_type();
1074 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1077 assert(value
!= NULL
);
1079 this->ir_type
= ir_type_dereference_record
;
1080 this->record
= value
;
1081 this->field
= ralloc_strdup(this, field
);
1082 this->type
= this->record
->type
->field_type(field
);
1086 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1089 void *ctx
= ralloc_parent(var
);
1091 this->ir_type
= ir_type_dereference_record
;
1092 this->record
= new(ctx
) ir_dereference_variable(var
);
1093 this->field
= ralloc_strdup(this, field
);
1094 this->type
= this->record
->type
->field_type(field
);
1098 ir_dereference::is_lvalue() const
1100 ir_variable
*var
= this->variable_referenced();
1102 /* Every l-value derference chain eventually ends in a variable.
1104 if ((var
== NULL
) || var
->read_only
)
1107 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1109 * "Samplers cannot be treated as l-values; hence cannot be used
1110 * as out or inout function parameters, nor can they be
1113 if (this->type
->contains_sampler())
1120 const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1122 const char *ir_texture::opcode_string()
1124 assert((unsigned int) op
<=
1125 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1126 return tex_opcode_strs
[op
];
1130 ir_texture::get_opcode(const char *str
)
1132 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1133 for (int op
= 0; op
< count
; op
++) {
1134 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1135 return (ir_texture_opcode
) op
;
1137 return (ir_texture_opcode
) -1;
1142 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1144 assert(sampler
!= NULL
);
1145 assert(type
!= NULL
);
1146 this->sampler
= sampler
;
1149 if (this->op
== ir_txs
) {
1150 assert(type
->base_type
== GLSL_TYPE_INT
);
1152 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1153 if (sampler
->type
->sampler_shadow
)
1154 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1156 assert(type
->vector_elements
== 4);
1162 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1164 assert((count
>= 1) && (count
<= 4));
1166 memset(&this->mask
, 0, sizeof(this->mask
));
1167 this->mask
.num_components
= count
;
1169 unsigned dup_mask
= 0;
1172 assert(comp
[3] <= 3);
1173 dup_mask
|= (1U << comp
[3])
1174 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1175 this->mask
.w
= comp
[3];
1178 assert(comp
[2] <= 3);
1179 dup_mask
|= (1U << comp
[2])
1180 & ((1U << comp
[0]) | (1U << comp
[1]));
1181 this->mask
.z
= comp
[2];
1184 assert(comp
[1] <= 3);
1185 dup_mask
|= (1U << comp
[1])
1186 & ((1U << comp
[0]));
1187 this->mask
.y
= comp
[1];
1190 assert(comp
[0] <= 3);
1191 this->mask
.x
= comp
[0];
1194 this->mask
.has_duplicates
= dup_mask
!= 0;
1196 /* Based on the number of elements in the swizzle and the base type
1197 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1198 * generate the type of the resulting value.
1200 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1203 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1204 unsigned w
, unsigned count
)
1207 const unsigned components
[4] = { x
, y
, z
, w
};
1208 this->ir_type
= ir_type_swizzle
;
1209 this->init_mask(components
, count
);
1212 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1216 this->ir_type
= ir_type_swizzle
;
1217 this->init_mask(comp
, count
);
1220 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1222 this->ir_type
= ir_type_swizzle
;
1225 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1226 mask
.num_components
, 1);
1235 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1237 void *ctx
= ralloc_parent(val
);
1239 /* For each possible swizzle character, this table encodes the value in
1240 * \c idx_map that represents the 0th element of the vector. For invalid
1241 * swizzle characters (e.g., 'k'), a special value is used that will allow
1242 * detection of errors.
1244 static const unsigned char base_idx
[26] = {
1245 /* a b c d e f g h i j k l m */
1246 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1247 /* n o p q r s t u v w x y z */
1248 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1251 /* Each valid swizzle character has an entry in the previous table. This
1252 * table encodes the base index encoded in the previous table plus the actual
1253 * index of the swizzle character. When processing swizzles, the first
1254 * character in the string is indexed in the previous table. Each character
1255 * in the string is indexed in this table, and the value found there has the
1256 * value form the first table subtracted. The result must be on the range
1259 * For example, the string "wzyx" will get X from the first table. Each of
1260 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1261 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1263 * The string "wzrg" will get X from the first table. Each of the characters
1264 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1265 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1266 * [0,3], the error is detected.
1268 static const unsigned char idx_map
[26] = {
1269 /* a b c d e f g h i j k l m */
1270 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1271 /* n o p q r s t u v w x y z */
1272 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1275 int swiz_idx
[4] = { 0, 0, 0, 0 };
1279 /* Validate the first character in the swizzle string and look up the base
1280 * index value as described above.
1282 if ((str
[0] < 'a') || (str
[0] > 'z'))
1285 const unsigned base
= base_idx
[str
[0] - 'a'];
1288 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1289 /* Validate the next character, and, as described above, convert it to a
1292 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1295 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1296 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1303 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1313 ir_swizzle::variable_referenced() const
1315 return this->val
->variable_referenced();
1319 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1320 ir_variable_mode mode
)
1321 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1322 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1324 this->ir_type
= ir_type_variable
;
1326 this->name
= ralloc_strdup(this, name
);
1327 this->explicit_location
= false;
1328 this->has_initializer
= false;
1329 this->location
= -1;
1330 this->warn_extension
= NULL
;
1331 this->constant_value
= NULL
;
1332 this->constant_initializer
= NULL
;
1333 this->origin_upper_left
= false;
1334 this->pixel_center_integer
= false;
1335 this->depth_layout
= ir_depth_layout_none
;
1338 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1339 this->read_only
= true;
1344 ir_variable::interpolation_string() const
1346 switch (this->interpolation
) {
1347 case INTERP_QUALIFIER_NONE
: return "no";
1348 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1349 case INTERP_QUALIFIER_FLAT
: return "flat";
1350 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1353 assert(!"Should not get here.");
1358 glsl_interp_qualifier
1359 ir_variable::determine_interpolation_mode(bool flat_shade
)
1361 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1362 return (glsl_interp_qualifier
) this->interpolation
;
1363 int location
= this->location
;
1365 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1366 if (flat_shade
&& is_gl_Color
)
1367 return INTERP_QUALIFIER_FLAT
;
1369 return INTERP_QUALIFIER_SMOOTH
;
1373 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1374 : return_type(return_type
), is_defined(false), _function(NULL
)
1376 this->ir_type
= ir_type_function_signature
;
1377 this->is_builtin
= false;
1382 modes_match(unsigned a
, unsigned b
)
1387 /* Accept "in" vs. "const in" */
1388 if ((a
== ir_var_const_in
&& b
== ir_var_in
) ||
1389 (b
== ir_var_const_in
&& a
== ir_var_in
))
1397 ir_function_signature::qualifiers_match(exec_list
*params
)
1399 exec_list_iterator iter_a
= parameters
.iterator();
1400 exec_list_iterator iter_b
= params
->iterator();
1402 /* check that the qualifiers match. */
1403 while (iter_a
.has_next()) {
1404 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1405 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1407 if (a
->read_only
!= b
->read_only
||
1408 !modes_match(a
->mode
, b
->mode
) ||
1409 a
->interpolation
!= b
->interpolation
||
1410 a
->centroid
!= b
->centroid
) {
1412 /* parameter a's qualifiers don't match */
1424 ir_function_signature::replace_parameters(exec_list
*new_params
)
1426 /* Destroy all of the previous parameter information. If the previous
1427 * parameter information comes from the function prototype, it may either
1428 * specify incorrect parameter names or not have names at all.
1430 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1431 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1436 new_params
->move_nodes_to(¶meters
);
1440 ir_function::ir_function(const char *name
)
1442 this->ir_type
= ir_type_function
;
1443 this->name
= ralloc_strdup(this, name
);
1448 ir_function::has_user_signature()
1450 foreach_list(n
, &this->signatures
) {
1451 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1452 if (!sig
->is_builtin
)
1460 ir_call::get_error_instruction(void *ctx
)
1462 ir_call
*call
= new(ctx
) ir_call
;
1464 call
->type
= glsl_type::error_type
;
1469 ir_call::set_callee(ir_function_signature
*sig
)
1471 assert((this->type
== NULL
) || (this->type
== sig
->return_type
));
1477 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1479 foreach_iter(exec_list_iterator
, iter
, *list
) {
1480 ((ir_instruction
*)iter
.get())->accept(visitor
);
1486 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1488 ir_variable
*var
= ir
->as_variable();
1489 ir_constant
*constant
= ir
->as_constant();
1490 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1491 steal_memory(var
->constant_value
, ir
);
1493 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1494 steal_memory(var
->constant_initializer
, ir
);
1496 /* The components of aggregate constants are not visited by the normal
1497 * visitor, so steal their values by hand.
1499 if (constant
!= NULL
) {
1500 if (constant
->type
->is_record()) {
1501 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1502 ir_constant
*field
= (ir_constant
*)iter
.get();
1503 steal_memory(field
, ir
);
1505 } else if (constant
->type
->is_array()) {
1506 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1507 steal_memory(constant
->array_elements
[i
], ir
);
1512 ralloc_steal(new_ctx
, ir
);
1517 reparent_ir(exec_list
*list
, void *mem_ctx
)
1519 foreach_list(node
, list
) {
1520 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1526 try_min_one(ir_rvalue
*ir
)
1528 ir_expression
*expr
= ir
->as_expression();
1530 if (!expr
|| expr
->operation
!= ir_binop_min
)
1533 if (expr
->operands
[0]->is_one())
1534 return expr
->operands
[1];
1536 if (expr
->operands
[1]->is_one())
1537 return expr
->operands
[0];
1543 try_max_zero(ir_rvalue
*ir
)
1545 ir_expression
*expr
= ir
->as_expression();
1547 if (!expr
|| expr
->operation
!= ir_binop_max
)
1550 if (expr
->operands
[0]->is_zero())
1551 return expr
->operands
[1];
1553 if (expr
->operands
[1]->is_zero())
1554 return expr
->operands
[0];
1560 ir_rvalue::as_rvalue_to_saturate()
1562 ir_expression
*expr
= this->as_expression();
1567 ir_rvalue
*max_zero
= try_max_zero(expr
);
1569 return try_min_one(max_zero
);
1571 ir_rvalue
*min_one
= try_min_one(expr
);
1573 return try_max_zero(min_one
);