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 case ir_unop_unpack_half_2x16_split_x
:
310 case ir_unop_unpack_half_2x16_split_y
:
311 this->type
= glsl_type::float_type
;
315 this->type
= glsl_type::bool_type
;
318 case ir_unop_pack_snorm_2x16
:
319 case ir_unop_pack_unorm_2x16
:
320 case ir_unop_pack_half_2x16
:
321 this->type
= glsl_type::uint_type
;
324 case ir_unop_unpack_snorm_2x16
:
325 case ir_unop_unpack_unorm_2x16
:
326 case ir_unop_unpack_half_2x16
:
327 this->type
= glsl_type::vec2_type
;
331 assert(!"not reached: missing automatic type setup for ir_expression");
332 this->type
= op0
->type
;
337 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
339 this->ir_type
= ir_type_expression
;
341 this->operation
= ir_expression_operation(op
);
342 this->operands
[0] = op0
;
343 this->operands
[1] = op1
;
344 this->operands
[2] = NULL
;
345 this->operands
[3] = NULL
;
347 assert(op
> ir_last_unop
);
349 switch (this->operation
) {
350 case ir_binop_all_equal
:
351 case ir_binop_any_nequal
:
352 this->type
= glsl_type::bool_type
;
363 if (op0
->type
->is_scalar()) {
364 this->type
= op1
->type
;
365 } else if (op1
->type
->is_scalar()) {
366 this->type
= op0
->type
;
368 /* FINISHME: matrix types */
369 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
370 assert(op0
->type
== op1
->type
);
371 this->type
= op0
->type
;
375 case ir_binop_logic_and
:
376 case ir_binop_logic_xor
:
377 case ir_binop_logic_or
:
378 case ir_binop_bit_and
:
379 case ir_binop_bit_xor
:
380 case ir_binop_bit_or
:
381 assert(!op0
->type
->is_matrix());
382 assert(!op1
->type
->is_matrix());
383 if (op0
->type
->is_scalar()) {
384 this->type
= op1
->type
;
385 } else if (op1
->type
->is_scalar()) {
386 this->type
= op0
->type
;
388 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
389 this->type
= op0
->type
;
394 case ir_binop_nequal
:
395 case ir_binop_lequal
:
396 case ir_binop_gequal
:
398 case ir_binop_greater
:
399 assert(op0
->type
== op1
->type
);
400 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
401 op0
->type
->vector_elements
, 1);
405 this->type
= glsl_type::float_type
;
408 case ir_binop_pack_half_2x16_split
:
409 this->type
= glsl_type::uint_type
;
412 case ir_binop_lshift
:
413 case ir_binop_rshift
:
414 this->type
= op0
->type
;
418 assert(!"not reached: missing automatic type setup for ir_expression");
419 this->type
= glsl_type::float_type
;
424 ir_expression::get_num_operands(ir_expression_operation op
)
426 assert(op
<= ir_last_opcode
);
428 if (op
<= ir_last_unop
)
431 if (op
<= ir_last_binop
)
434 if (op
== ir_quadop_vector
)
441 static const char *const operator_strs
[] = {
486 "unpackHalf2x16_split_x",
487 "unpackHalf2x16_split_y",
514 "packHalf2x16_split",
519 const char *ir_expression::operator_string(ir_expression_operation op
)
521 assert((unsigned int) op
< Elements(operator_strs
));
522 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
523 return operator_strs
[op
];
526 const char *ir_expression::operator_string()
528 return operator_string(this->operation
);
532 depth_layout_string(ir_depth_layout layout
)
535 case ir_depth_layout_none
: return "";
536 case ir_depth_layout_any
: return "depth_any";
537 case ir_depth_layout_greater
: return "depth_greater";
538 case ir_depth_layout_less
: return "depth_less";
539 case ir_depth_layout_unchanged
: return "depth_unchanged";
547 ir_expression_operation
548 ir_expression::get_operator(const char *str
)
550 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
551 for (int op
= 0; op
< operator_count
; op
++) {
552 if (strcmp(str
, operator_strs
[op
]) == 0)
553 return (ir_expression_operation
) op
;
555 return (ir_expression_operation
) -1;
558 ir_constant::ir_constant()
560 this->ir_type
= ir_type_constant
;
563 ir_constant::ir_constant(const struct glsl_type
*type
,
564 const ir_constant_data
*data
)
566 assert((type
->base_type
>= GLSL_TYPE_UINT
)
567 && (type
->base_type
<= GLSL_TYPE_BOOL
));
569 this->ir_type
= ir_type_constant
;
571 memcpy(& this->value
, data
, sizeof(this->value
));
574 ir_constant::ir_constant(float f
)
576 this->ir_type
= ir_type_constant
;
577 this->type
= glsl_type::float_type
;
578 this->value
.f
[0] = f
;
579 for (int i
= 1; i
< 16; i
++) {
580 this->value
.f
[i
] = 0;
584 ir_constant::ir_constant(unsigned int u
)
586 this->ir_type
= ir_type_constant
;
587 this->type
= glsl_type::uint_type
;
588 this->value
.u
[0] = u
;
589 for (int i
= 1; i
< 16; i
++) {
590 this->value
.u
[i
] = 0;
594 ir_constant::ir_constant(int i
)
596 this->ir_type
= ir_type_constant
;
597 this->type
= glsl_type::int_type
;
598 this->value
.i
[0] = i
;
599 for (int i
= 1; i
< 16; i
++) {
600 this->value
.i
[i
] = 0;
604 ir_constant::ir_constant(bool b
)
606 this->ir_type
= ir_type_constant
;
607 this->type
= glsl_type::bool_type
;
608 this->value
.b
[0] = b
;
609 for (int i
= 1; i
< 16; i
++) {
610 this->value
.b
[i
] = false;
614 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
616 this->ir_type
= ir_type_constant
;
617 this->type
= c
->type
->get_base_type();
619 switch (this->type
->base_type
) {
620 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
621 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
622 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
623 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
624 default: assert(!"Should not get here."); break;
628 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
630 this->ir_type
= ir_type_constant
;
633 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
634 || type
->is_record() || type
->is_array());
636 if (type
->is_array()) {
637 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
639 foreach_list(node
, value_list
) {
640 ir_constant
*value
= (ir_constant
*) node
;
641 assert(value
->as_constant() != NULL
);
643 this->array_elements
[i
++] = value
;
648 /* If the constant is a record, the types of each of the entries in
649 * value_list must be a 1-for-1 match with the structure components. Each
650 * entry must also be a constant. Just move the nodes from the value_list
651 * to the list in the ir_constant.
653 /* FINISHME: Should there be some type checking and / or assertions here? */
654 /* FINISHME: Should the new constant take ownership of the nodes from
655 * FINISHME: value_list, or should it make copies?
657 if (type
->is_record()) {
658 value_list
->move_nodes_to(& this->components
);
662 for (unsigned i
= 0; i
< 16; i
++) {
663 this->value
.u
[i
] = 0;
666 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
668 /* Constructors with exactly one scalar argument are special for vectors
669 * and matrices. For vectors, the scalar value is replicated to fill all
670 * the components. For matrices, the scalar fills the components of the
671 * diagonal while the rest is filled with 0.
673 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
674 if (type
->is_matrix()) {
675 /* Matrix - fill diagonal (rest is already set to 0) */
676 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
677 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
678 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
680 /* Vector or scalar - fill all components */
681 switch (type
->base_type
) {
684 for (unsigned i
= 0; i
< type
->components(); i
++)
685 this->value
.u
[i
] = value
->value
.u
[0];
687 case GLSL_TYPE_FLOAT
:
688 for (unsigned i
= 0; i
< type
->components(); i
++)
689 this->value
.f
[i
] = value
->value
.f
[0];
692 for (unsigned i
= 0; i
< type
->components(); i
++)
693 this->value
.b
[i
] = value
->value
.b
[0];
696 assert(!"Should not get here.");
703 if (type
->is_matrix() && value
->type
->is_matrix()) {
704 assert(value
->next
->is_tail_sentinel());
706 /* From section 5.4.2 of the GLSL 1.20 spec:
707 * "If a matrix is constructed from a matrix, then each component
708 * (column i, row j) in the result that has a corresponding component
709 * (column i, row j) in the argument will be initialized from there."
711 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
712 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
713 for (unsigned i
= 0; i
< cols
; i
++) {
714 for (unsigned j
= 0; j
< rows
; j
++) {
715 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
716 const unsigned dst
= i
* type
->vector_elements
+ j
;
717 this->value
.f
[dst
] = value
->value
.f
[src
];
721 /* "All other components will be initialized to the identity matrix." */
722 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
723 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
728 /* Use each component from each entry in the value_list to initialize one
729 * component of the constant being constructed.
731 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
732 assert(value
->as_constant() != NULL
);
733 assert(!value
->is_tail_sentinel());
735 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
736 switch (type
->base_type
) {
738 this->value
.u
[i
] = value
->get_uint_component(j
);
741 this->value
.i
[i
] = value
->get_int_component(j
);
743 case GLSL_TYPE_FLOAT
:
744 this->value
.f
[i
] = value
->get_float_component(j
);
747 this->value
.b
[i
] = value
->get_bool_component(j
);
750 /* FINISHME: What to do? Exceptions are not the answer.
756 if (i
>= type
->components())
760 value
= (ir_constant
*) value
->next
;
765 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
767 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
768 || type
->is_record() || type
->is_array());
770 ir_constant
*c
= new(mem_ctx
) ir_constant
;
772 memset(&c
->value
, 0, sizeof(c
->value
));
774 if (type
->is_array()) {
775 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
777 for (unsigned i
= 0; i
< type
->length
; i
++)
778 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
781 if (type
->is_record()) {
782 for (unsigned i
= 0; i
< type
->length
; i
++) {
783 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
784 c
->components
.push_tail(comp
);
792 ir_constant::get_bool_component(unsigned i
) const
794 switch (this->type
->base_type
) {
795 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
796 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
797 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
798 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
799 default: assert(!"Should not get here."); break;
802 /* Must return something to make the compiler happy. This is clearly an
809 ir_constant::get_float_component(unsigned i
) const
811 switch (this->type
->base_type
) {
812 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
813 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
814 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
815 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
816 default: assert(!"Should not get here."); break;
819 /* Must return something to make the compiler happy. This is clearly an
826 ir_constant::get_int_component(unsigned i
) const
828 switch (this->type
->base_type
) {
829 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
830 case GLSL_TYPE_INT
: return this->value
.i
[i
];
831 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
832 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
833 default: assert(!"Should not get here."); break;
836 /* Must return something to make the compiler happy. This is clearly an
843 ir_constant::get_uint_component(unsigned i
) const
845 switch (this->type
->base_type
) {
846 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
847 case GLSL_TYPE_INT
: return this->value
.i
[i
];
848 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
849 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
850 default: assert(!"Should not get here."); break;
853 /* Must return something to make the compiler happy. This is clearly an
860 ir_constant::get_array_element(unsigned i
) const
862 assert(this->type
->is_array());
864 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
866 * "Behavior is undefined if a shader subscripts an array with an index
867 * less than 0 or greater than or equal to the size the array was
870 * Most out-of-bounds accesses are removed before things could get this far.
871 * There are cases where non-constant array index values can get constant
876 else if (i
>= this->type
->length
)
877 i
= this->type
->length
- 1;
879 return array_elements
[i
];
883 ir_constant::get_record_field(const char *name
)
885 int idx
= this->type
->field_index(name
);
890 if (this->components
.is_empty())
893 exec_node
*node
= this->components
.head
;
894 for (int i
= 0; i
< idx
; i
++) {
897 /* If the end of the list is encountered before the element matching the
898 * requested field is found, return NULL.
900 if (node
->is_tail_sentinel())
904 return (ir_constant
*) node
;
908 ir_constant::copy_offset(ir_constant
*src
, int offset
)
910 switch (this->type
->base_type
) {
913 case GLSL_TYPE_FLOAT
:
914 case GLSL_TYPE_BOOL
: {
915 unsigned int size
= src
->type
->components();
916 assert (size
<= this->type
->components() - offset
);
917 for (unsigned int i
=0; i
<size
; i
++) {
918 switch (this->type
->base_type
) {
920 value
.u
[i
+offset
] = src
->get_uint_component(i
);
923 value
.i
[i
+offset
] = src
->get_int_component(i
);
925 case GLSL_TYPE_FLOAT
:
926 value
.f
[i
+offset
] = src
->get_float_component(i
);
929 value
.b
[i
+offset
] = src
->get_bool_component(i
);
931 default: // Shut up the compiler
938 case GLSL_TYPE_STRUCT
: {
939 assert (src
->type
== this->type
);
940 this->components
.make_empty();
941 foreach_list(node
, &src
->components
) {
942 ir_constant
*const orig
= (ir_constant
*) node
;
944 this->components
.push_tail(orig
->clone(this, NULL
));
949 case GLSL_TYPE_ARRAY
: {
950 assert (src
->type
== this->type
);
951 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
952 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
958 assert(!"Should not get here.");
964 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
966 assert (!type
->is_array() && !type
->is_record());
968 if (!type
->is_vector() && !type
->is_matrix()) {
974 for (int i
=0; i
<4; i
++) {
975 if (mask
& (1 << i
)) {
976 switch (this->type
->base_type
) {
978 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
981 value
.i
[i
+offset
] = src
->get_int_component(id
++);
983 case GLSL_TYPE_FLOAT
:
984 value
.f
[i
+offset
] = src
->get_float_component(id
++);
987 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
990 assert(!"Should not get here.");
998 ir_constant::has_value(const ir_constant
*c
) const
1000 if (this->type
!= c
->type
)
1003 if (this->type
->is_array()) {
1004 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1005 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1011 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1012 const exec_node
*a_node
= this->components
.head
;
1013 const exec_node
*b_node
= c
->components
.head
;
1015 while (!a_node
->is_tail_sentinel()) {
1016 assert(!b_node
->is_tail_sentinel());
1018 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1019 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1021 if (!a_field
->has_value(b_field
))
1024 a_node
= a_node
->next
;
1025 b_node
= b_node
->next
;
1031 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1032 switch (this->type
->base_type
) {
1033 case GLSL_TYPE_UINT
:
1034 if (this->value
.u
[i
] != c
->value
.u
[i
])
1038 if (this->value
.i
[i
] != c
->value
.i
[i
])
1041 case GLSL_TYPE_FLOAT
:
1042 if (this->value
.f
[i
] != c
->value
.f
[i
])
1045 case GLSL_TYPE_BOOL
:
1046 if (this->value
.b
[i
] != c
->value
.b
[i
])
1050 assert(!"Should not get here.");
1059 ir_constant::is_zero() const
1061 if (!this->type
->is_scalar() && !this->type
->is_vector())
1064 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1065 switch (this->type
->base_type
) {
1066 case GLSL_TYPE_FLOAT
:
1067 if (this->value
.f
[c
] != 0.0)
1071 if (this->value
.i
[c
] != 0)
1074 case GLSL_TYPE_UINT
:
1075 if (this->value
.u
[c
] != 0)
1078 case GLSL_TYPE_BOOL
:
1079 if (this->value
.b
[c
] != false)
1083 /* The only other base types are structures, arrays, and samplers.
1084 * Samplers cannot be constants, and the others should have been
1085 * filtered out above.
1087 assert(!"Should not get here.");
1096 ir_constant::is_one() const
1098 if (!this->type
->is_scalar() && !this->type
->is_vector())
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 (this->value
.u
[c
] != 1)
1115 case GLSL_TYPE_BOOL
:
1116 if (this->value
.b
[c
] != true)
1120 /* The only other base types are structures, arrays, and samplers.
1121 * Samplers cannot be constants, and the others should have been
1122 * filtered out above.
1124 assert(!"Should not get here.");
1133 ir_constant::is_negative_one() const
1135 if (!this->type
->is_scalar() && !this->type
->is_vector())
1138 if (this->type
->is_boolean())
1141 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1142 switch (this->type
->base_type
) {
1143 case GLSL_TYPE_FLOAT
:
1144 if (this->value
.f
[c
] != -1.0)
1148 if (this->value
.i
[c
] != -1)
1151 case GLSL_TYPE_UINT
:
1152 if (int(this->value
.u
[c
]) != -1)
1156 /* The only other base types are structures, arrays, samplers, and
1157 * booleans. Samplers cannot be constants, and the others should
1158 * have been filtered out above.
1160 assert(!"Should not get here.");
1169 ir_constant::is_basis() const
1171 if (!this->type
->is_scalar() && !this->type
->is_vector())
1174 if (this->type
->is_boolean())
1178 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1179 switch (this->type
->base_type
) {
1180 case GLSL_TYPE_FLOAT
:
1181 if (this->value
.f
[c
] == 1.0)
1183 else if (this->value
.f
[c
] != 0.0)
1187 if (this->value
.i
[c
] == 1)
1189 else if (this->value
.i
[c
] != 0)
1192 case GLSL_TYPE_UINT
:
1193 if (int(this->value
.u
[c
]) == 1)
1195 else if (int(this->value
.u
[c
]) != 0)
1199 /* The only other base types are structures, arrays, samplers, and
1200 * booleans. Samplers cannot be constants, and the others should
1201 * have been filtered out above.
1203 assert(!"Should not get here.");
1213 this->ir_type
= ir_type_loop
;
1214 this->cmp
= ir_unop_neg
;
1217 this->increment
= NULL
;
1218 this->counter
= NULL
;
1222 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1224 assert(var
!= NULL
);
1226 this->ir_type
= ir_type_dereference_variable
;
1228 this->type
= var
->type
;
1232 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1233 ir_rvalue
*array_index
)
1235 this->ir_type
= ir_type_dereference_array
;
1236 this->array_index
= array_index
;
1237 this->set_array(value
);
1241 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1242 ir_rvalue
*array_index
)
1244 void *ctx
= ralloc_parent(var
);
1246 this->ir_type
= ir_type_dereference_array
;
1247 this->array_index
= array_index
;
1248 this->set_array(new(ctx
) ir_dereference_variable(var
));
1253 ir_dereference_array::set_array(ir_rvalue
*value
)
1255 assert(value
!= NULL
);
1257 this->array
= value
;
1259 const glsl_type
*const vt
= this->array
->type
;
1261 if (vt
->is_array()) {
1262 type
= vt
->element_type();
1263 } else if (vt
->is_matrix()) {
1264 type
= vt
->column_type();
1265 } else if (vt
->is_vector()) {
1266 type
= vt
->get_base_type();
1271 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1274 assert(value
!= NULL
);
1276 this->ir_type
= ir_type_dereference_record
;
1277 this->record
= value
;
1278 this->field
= ralloc_strdup(this, field
);
1279 this->type
= this->record
->type
->field_type(field
);
1283 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1286 void *ctx
= ralloc_parent(var
);
1288 this->ir_type
= ir_type_dereference_record
;
1289 this->record
= new(ctx
) ir_dereference_variable(var
);
1290 this->field
= ralloc_strdup(this, field
);
1291 this->type
= this->record
->type
->field_type(field
);
1295 ir_dereference::is_lvalue() const
1297 ir_variable
*var
= this->variable_referenced();
1299 /* Every l-value derference chain eventually ends in a variable.
1301 if ((var
== NULL
) || var
->read_only
)
1304 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1306 * "Samplers cannot be treated as l-values; hence cannot be used
1307 * as out or inout function parameters, nor can they be
1310 if (this->type
->contains_sampler())
1317 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1319 const char *ir_texture::opcode_string()
1321 assert((unsigned int) op
<=
1322 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1323 return tex_opcode_strs
[op
];
1327 ir_texture::get_opcode(const char *str
)
1329 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1330 for (int op
= 0; op
< count
; op
++) {
1331 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1332 return (ir_texture_opcode
) op
;
1334 return (ir_texture_opcode
) -1;
1339 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1341 assert(sampler
!= NULL
);
1342 assert(type
!= NULL
);
1343 this->sampler
= sampler
;
1346 if (this->op
== ir_txs
) {
1347 assert(type
->base_type
== GLSL_TYPE_INT
);
1349 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1350 if (sampler
->type
->sampler_shadow
)
1351 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1353 assert(type
->vector_elements
== 4);
1359 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1361 assert((count
>= 1) && (count
<= 4));
1363 memset(&this->mask
, 0, sizeof(this->mask
));
1364 this->mask
.num_components
= count
;
1366 unsigned dup_mask
= 0;
1369 assert(comp
[3] <= 3);
1370 dup_mask
|= (1U << comp
[3])
1371 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1372 this->mask
.w
= comp
[3];
1375 assert(comp
[2] <= 3);
1376 dup_mask
|= (1U << comp
[2])
1377 & ((1U << comp
[0]) | (1U << comp
[1]));
1378 this->mask
.z
= comp
[2];
1381 assert(comp
[1] <= 3);
1382 dup_mask
|= (1U << comp
[1])
1383 & ((1U << comp
[0]));
1384 this->mask
.y
= comp
[1];
1387 assert(comp
[0] <= 3);
1388 this->mask
.x
= comp
[0];
1391 this->mask
.has_duplicates
= dup_mask
!= 0;
1393 /* Based on the number of elements in the swizzle and the base type
1394 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1395 * generate the type of the resulting value.
1397 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1400 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1401 unsigned w
, unsigned count
)
1404 const unsigned components
[4] = { x
, y
, z
, w
};
1405 this->ir_type
= ir_type_swizzle
;
1406 this->init_mask(components
, count
);
1409 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1413 this->ir_type
= ir_type_swizzle
;
1414 this->init_mask(comp
, count
);
1417 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1419 this->ir_type
= ir_type_swizzle
;
1422 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1423 mask
.num_components
, 1);
1432 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1434 void *ctx
= ralloc_parent(val
);
1436 /* For each possible swizzle character, this table encodes the value in
1437 * \c idx_map that represents the 0th element of the vector. For invalid
1438 * swizzle characters (e.g., 'k'), a special value is used that will allow
1439 * detection of errors.
1441 static const unsigned char base_idx
[26] = {
1442 /* a b c d e f g h i j k l m */
1443 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1444 /* n o p q r s t u v w x y z */
1445 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1448 /* Each valid swizzle character has an entry in the previous table. This
1449 * table encodes the base index encoded in the previous table plus the actual
1450 * index of the swizzle character. When processing swizzles, the first
1451 * character in the string is indexed in the previous table. Each character
1452 * in the string is indexed in this table, and the value found there has the
1453 * value form the first table subtracted. The result must be on the range
1456 * For example, the string "wzyx" will get X from the first table. Each of
1457 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1458 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1460 * The string "wzrg" will get X from the first table. Each of the characters
1461 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1462 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1463 * [0,3], the error is detected.
1465 static const unsigned char idx_map
[26] = {
1466 /* a b c d e f g h i j k l m */
1467 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1468 /* n o p q r s t u v w x y z */
1469 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1472 int swiz_idx
[4] = { 0, 0, 0, 0 };
1476 /* Validate the first character in the swizzle string and look up the base
1477 * index value as described above.
1479 if ((str
[0] < 'a') || (str
[0] > 'z'))
1482 const unsigned base
= base_idx
[str
[0] - 'a'];
1485 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1486 /* Validate the next character, and, as described above, convert it to a
1489 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1492 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1493 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1500 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1510 ir_swizzle::variable_referenced() const
1512 return this->val
->variable_referenced();
1516 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1517 ir_variable_mode mode
)
1518 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1519 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1521 this->ir_type
= ir_type_variable
;
1523 this->name
= ralloc_strdup(this, name
);
1524 this->explicit_location
= false;
1525 this->has_initializer
= false;
1526 this->location
= -1;
1527 this->location_frac
= 0;
1528 this->uniform_block
= -1;
1529 this->warn_extension
= NULL
;
1530 this->constant_value
= NULL
;
1531 this->constant_initializer
= NULL
;
1532 this->origin_upper_left
= false;
1533 this->pixel_center_integer
= false;
1534 this->depth_layout
= ir_depth_layout_none
;
1537 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1538 this->read_only
= true;
1543 ir_variable::interpolation_string() const
1545 switch (this->interpolation
) {
1546 case INTERP_QUALIFIER_NONE
: return "no";
1547 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1548 case INTERP_QUALIFIER_FLAT
: return "flat";
1549 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1552 assert(!"Should not get here.");
1557 glsl_interp_qualifier
1558 ir_variable::determine_interpolation_mode(bool flat_shade
)
1560 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1561 return (glsl_interp_qualifier
) this->interpolation
;
1562 int location
= this->location
;
1564 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1565 if (flat_shade
&& is_gl_Color
)
1566 return INTERP_QUALIFIER_FLAT
;
1568 return INTERP_QUALIFIER_SMOOTH
;
1572 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1573 : return_type(return_type
), is_defined(false), _function(NULL
)
1575 this->ir_type
= ir_type_function_signature
;
1576 this->is_builtin
= false;
1577 this->origin
= NULL
;
1582 modes_match(unsigned a
, unsigned b
)
1587 /* Accept "in" vs. "const in" */
1588 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1589 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1597 ir_function_signature::qualifiers_match(exec_list
*params
)
1599 exec_list_iterator iter_a
= parameters
.iterator();
1600 exec_list_iterator iter_b
= params
->iterator();
1602 /* check that the qualifiers match. */
1603 while (iter_a
.has_next()) {
1604 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1605 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1607 if (a
->read_only
!= b
->read_only
||
1608 !modes_match(a
->mode
, b
->mode
) ||
1609 a
->interpolation
!= b
->interpolation
||
1610 a
->centroid
!= b
->centroid
) {
1612 /* parameter a's qualifiers don't match */
1624 ir_function_signature::replace_parameters(exec_list
*new_params
)
1626 /* Destroy all of the previous parameter information. If the previous
1627 * parameter information comes from the function prototype, it may either
1628 * specify incorrect parameter names or not have names at all.
1630 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1631 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1636 new_params
->move_nodes_to(¶meters
);
1640 ir_function::ir_function(const char *name
)
1642 this->ir_type
= ir_type_function
;
1643 this->name
= ralloc_strdup(this, name
);
1648 ir_function::has_user_signature()
1650 foreach_list(n
, &this->signatures
) {
1651 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1652 if (!sig
->is_builtin
)
1660 ir_rvalue::error_value(void *mem_ctx
)
1662 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1664 v
->type
= glsl_type::error_type
;
1670 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1672 foreach_iter(exec_list_iterator
, iter
, *list
) {
1673 ((ir_instruction
*)iter
.get())->accept(visitor
);
1679 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1681 ir_variable
*var
= ir
->as_variable();
1682 ir_constant
*constant
= ir
->as_constant();
1683 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1684 steal_memory(var
->constant_value
, ir
);
1686 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1687 steal_memory(var
->constant_initializer
, ir
);
1689 /* The components of aggregate constants are not visited by the normal
1690 * visitor, so steal their values by hand.
1692 if (constant
!= NULL
) {
1693 if (constant
->type
->is_record()) {
1694 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1695 ir_constant
*field
= (ir_constant
*)iter
.get();
1696 steal_memory(field
, ir
);
1698 } else if (constant
->type
->is_array()) {
1699 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1700 steal_memory(constant
->array_elements
[i
], ir
);
1705 ralloc_steal(new_ctx
, ir
);
1710 reparent_ir(exec_list
*list
, void *mem_ctx
)
1712 foreach_list(node
, list
) {
1713 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1719 try_min_one(ir_rvalue
*ir
)
1721 ir_expression
*expr
= ir
->as_expression();
1723 if (!expr
|| expr
->operation
!= ir_binop_min
)
1726 if (expr
->operands
[0]->is_one())
1727 return expr
->operands
[1];
1729 if (expr
->operands
[1]->is_one())
1730 return expr
->operands
[0];
1736 try_max_zero(ir_rvalue
*ir
)
1738 ir_expression
*expr
= ir
->as_expression();
1740 if (!expr
|| expr
->operation
!= ir_binop_max
)
1743 if (expr
->operands
[0]->is_zero())
1744 return expr
->operands
[1];
1746 if (expr
->operands
[1]->is_zero())
1747 return expr
->operands
[0];
1753 ir_rvalue::as_rvalue_to_saturate()
1755 ir_expression
*expr
= this->as_expression();
1760 ir_rvalue
*max_zero
= try_max_zero(expr
);
1762 return try_min_one(max_zero
);
1764 ir_rvalue
*min_one
= try_min_one(expr
);
1766 return try_max_zero(min_one
);