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_snorm_4x8
:
320 case ir_unop_pack_unorm_2x16
:
321 case ir_unop_pack_unorm_4x8
:
322 case ir_unop_pack_half_2x16
:
323 this->type
= glsl_type::uint_type
;
326 case ir_unop_unpack_snorm_2x16
:
327 case ir_unop_unpack_unorm_2x16
:
328 case ir_unop_unpack_half_2x16
:
329 this->type
= glsl_type::vec2_type
;
332 case ir_unop_unpack_snorm_4x8
:
333 case ir_unop_unpack_unorm_4x8
:
334 this->type
= glsl_type::vec4_type
;
338 assert(!"not reached: missing automatic type setup for ir_expression");
339 this->type
= op0
->type
;
344 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
346 this->ir_type
= ir_type_expression
;
348 this->operation
= ir_expression_operation(op
);
349 this->operands
[0] = op0
;
350 this->operands
[1] = op1
;
351 this->operands
[2] = NULL
;
352 this->operands
[3] = NULL
;
354 assert(op
> ir_last_unop
);
356 switch (this->operation
) {
357 case ir_binop_all_equal
:
358 case ir_binop_any_nequal
:
359 this->type
= glsl_type::bool_type
;
370 if (op0
->type
->is_scalar()) {
371 this->type
= op1
->type
;
372 } else if (op1
->type
->is_scalar()) {
373 this->type
= op0
->type
;
375 /* FINISHME: matrix types */
376 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
377 assert(op0
->type
== op1
->type
);
378 this->type
= op0
->type
;
382 case ir_binop_logic_and
:
383 case ir_binop_logic_xor
:
384 case ir_binop_logic_or
:
385 case ir_binop_bit_and
:
386 case ir_binop_bit_xor
:
387 case ir_binop_bit_or
:
388 assert(!op0
->type
->is_matrix());
389 assert(!op1
->type
->is_matrix());
390 if (op0
->type
->is_scalar()) {
391 this->type
= op1
->type
;
392 } else if (op1
->type
->is_scalar()) {
393 this->type
= op0
->type
;
395 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
396 this->type
= op0
->type
;
401 case ir_binop_nequal
:
402 case ir_binop_lequal
:
403 case ir_binop_gequal
:
405 case ir_binop_greater
:
406 assert(op0
->type
== op1
->type
);
407 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
408 op0
->type
->vector_elements
, 1);
412 this->type
= glsl_type::float_type
;
415 case ir_binop_pack_half_2x16_split
:
416 this->type
= glsl_type::uint_type
;
419 case ir_binop_lshift
:
420 case ir_binop_rshift
:
421 this->type
= op0
->type
;
425 assert(!"not reached: missing automatic type setup for ir_expression");
426 this->type
= glsl_type::float_type
;
431 ir_expression::get_num_operands(ir_expression_operation op
)
433 assert(op
<= ir_last_opcode
);
435 if (op
<= ir_last_unop
)
438 if (op
<= ir_last_binop
)
441 if (op
== ir_quadop_vector
)
448 static const char *const operator_strs
[] = {
497 "unpackHalf2x16_split_x",
498 "unpackHalf2x16_split_y",
525 "packHalf2x16_split",
530 const char *ir_expression::operator_string(ir_expression_operation op
)
532 assert((unsigned int) op
< Elements(operator_strs
));
533 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
534 return operator_strs
[op
];
537 const char *ir_expression::operator_string()
539 return operator_string(this->operation
);
543 depth_layout_string(ir_depth_layout layout
)
546 case ir_depth_layout_none
: return "";
547 case ir_depth_layout_any
: return "depth_any";
548 case ir_depth_layout_greater
: return "depth_greater";
549 case ir_depth_layout_less
: return "depth_less";
550 case ir_depth_layout_unchanged
: return "depth_unchanged";
558 ir_expression_operation
559 ir_expression::get_operator(const char *str
)
561 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
562 for (int op
= 0; op
< operator_count
; op
++) {
563 if (strcmp(str
, operator_strs
[op
]) == 0)
564 return (ir_expression_operation
) op
;
566 return (ir_expression_operation
) -1;
569 ir_constant::ir_constant()
571 this->ir_type
= ir_type_constant
;
574 ir_constant::ir_constant(const struct glsl_type
*type
,
575 const ir_constant_data
*data
)
577 assert((type
->base_type
>= GLSL_TYPE_UINT
)
578 && (type
->base_type
<= GLSL_TYPE_BOOL
));
580 this->ir_type
= ir_type_constant
;
582 memcpy(& this->value
, data
, sizeof(this->value
));
585 ir_constant::ir_constant(float f
)
587 this->ir_type
= ir_type_constant
;
588 this->type
= glsl_type::float_type
;
589 this->value
.f
[0] = f
;
590 for (int i
= 1; i
< 16; i
++) {
591 this->value
.f
[i
] = 0;
595 ir_constant::ir_constant(unsigned int u
)
597 this->ir_type
= ir_type_constant
;
598 this->type
= glsl_type::uint_type
;
599 this->value
.u
[0] = u
;
600 for (int i
= 1; i
< 16; i
++) {
601 this->value
.u
[i
] = 0;
605 ir_constant::ir_constant(int i
)
607 this->ir_type
= ir_type_constant
;
608 this->type
= glsl_type::int_type
;
609 this->value
.i
[0] = i
;
610 for (int i
= 1; i
< 16; i
++) {
611 this->value
.i
[i
] = 0;
615 ir_constant::ir_constant(bool b
)
617 this->ir_type
= ir_type_constant
;
618 this->type
= glsl_type::bool_type
;
619 this->value
.b
[0] = b
;
620 for (int i
= 1; i
< 16; i
++) {
621 this->value
.b
[i
] = false;
625 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
627 this->ir_type
= ir_type_constant
;
628 this->type
= c
->type
->get_base_type();
630 switch (this->type
->base_type
) {
631 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
632 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
633 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
634 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
635 default: assert(!"Should not get here."); break;
639 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
641 this->ir_type
= ir_type_constant
;
644 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
645 || type
->is_record() || type
->is_array());
647 if (type
->is_array()) {
648 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
650 foreach_list(node
, value_list
) {
651 ir_constant
*value
= (ir_constant
*) node
;
652 assert(value
->as_constant() != NULL
);
654 this->array_elements
[i
++] = value
;
659 /* If the constant is a record, the types of each of the entries in
660 * value_list must be a 1-for-1 match with the structure components. Each
661 * entry must also be a constant. Just move the nodes from the value_list
662 * to the list in the ir_constant.
664 /* FINISHME: Should there be some type checking and / or assertions here? */
665 /* FINISHME: Should the new constant take ownership of the nodes from
666 * FINISHME: value_list, or should it make copies?
668 if (type
->is_record()) {
669 value_list
->move_nodes_to(& this->components
);
673 for (unsigned i
= 0; i
< 16; i
++) {
674 this->value
.u
[i
] = 0;
677 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
679 /* Constructors with exactly one scalar argument are special for vectors
680 * and matrices. For vectors, the scalar value is replicated to fill all
681 * the components. For matrices, the scalar fills the components of the
682 * diagonal while the rest is filled with 0.
684 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
685 if (type
->is_matrix()) {
686 /* Matrix - fill diagonal (rest is already set to 0) */
687 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
688 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
689 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
691 /* Vector or scalar - fill all components */
692 switch (type
->base_type
) {
695 for (unsigned i
= 0; i
< type
->components(); i
++)
696 this->value
.u
[i
] = value
->value
.u
[0];
698 case GLSL_TYPE_FLOAT
:
699 for (unsigned i
= 0; i
< type
->components(); i
++)
700 this->value
.f
[i
] = value
->value
.f
[0];
703 for (unsigned i
= 0; i
< type
->components(); i
++)
704 this->value
.b
[i
] = value
->value
.b
[0];
707 assert(!"Should not get here.");
714 if (type
->is_matrix() && value
->type
->is_matrix()) {
715 assert(value
->next
->is_tail_sentinel());
717 /* From section 5.4.2 of the GLSL 1.20 spec:
718 * "If a matrix is constructed from a matrix, then each component
719 * (column i, row j) in the result that has a corresponding component
720 * (column i, row j) in the argument will be initialized from there."
722 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
723 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
724 for (unsigned i
= 0; i
< cols
; i
++) {
725 for (unsigned j
= 0; j
< rows
; j
++) {
726 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
727 const unsigned dst
= i
* type
->vector_elements
+ j
;
728 this->value
.f
[dst
] = value
->value
.f
[src
];
732 /* "All other components will be initialized to the identity matrix." */
733 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
734 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
739 /* Use each component from each entry in the value_list to initialize one
740 * component of the constant being constructed.
742 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
743 assert(value
->as_constant() != NULL
);
744 assert(!value
->is_tail_sentinel());
746 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
747 switch (type
->base_type
) {
749 this->value
.u
[i
] = value
->get_uint_component(j
);
752 this->value
.i
[i
] = value
->get_int_component(j
);
754 case GLSL_TYPE_FLOAT
:
755 this->value
.f
[i
] = value
->get_float_component(j
);
758 this->value
.b
[i
] = value
->get_bool_component(j
);
761 /* FINISHME: What to do? Exceptions are not the answer.
767 if (i
>= type
->components())
771 value
= (ir_constant
*) value
->next
;
776 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
778 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
779 || type
->is_record() || type
->is_array());
781 ir_constant
*c
= new(mem_ctx
) ir_constant
;
783 memset(&c
->value
, 0, sizeof(c
->value
));
785 if (type
->is_array()) {
786 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
788 for (unsigned i
= 0; i
< type
->length
; i
++)
789 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
792 if (type
->is_record()) {
793 for (unsigned i
= 0; i
< type
->length
; i
++) {
794 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
795 c
->components
.push_tail(comp
);
803 ir_constant::get_bool_component(unsigned i
) const
805 switch (this->type
->base_type
) {
806 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
807 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
808 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
809 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
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_float_component(unsigned i
) const
822 switch (this->type
->base_type
) {
823 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
824 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
825 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
826 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
827 default: assert(!"Should not get here."); break;
830 /* Must return something to make the compiler happy. This is clearly an
837 ir_constant::get_int_component(unsigned i
) const
839 switch (this->type
->base_type
) {
840 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
841 case GLSL_TYPE_INT
: return this->value
.i
[i
];
842 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
843 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
844 default: assert(!"Should not get here."); break;
847 /* Must return something to make the compiler happy. This is clearly an
854 ir_constant::get_uint_component(unsigned i
) const
856 switch (this->type
->base_type
) {
857 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
858 case GLSL_TYPE_INT
: return this->value
.i
[i
];
859 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
860 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
861 default: assert(!"Should not get here."); break;
864 /* Must return something to make the compiler happy. This is clearly an
871 ir_constant::get_array_element(unsigned i
) const
873 assert(this->type
->is_array());
875 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
877 * "Behavior is undefined if a shader subscripts an array with an index
878 * less than 0 or greater than or equal to the size the array was
881 * Most out-of-bounds accesses are removed before things could get this far.
882 * There are cases where non-constant array index values can get constant
887 else if (i
>= this->type
->length
)
888 i
= this->type
->length
- 1;
890 return array_elements
[i
];
894 ir_constant::get_record_field(const char *name
)
896 int idx
= this->type
->field_index(name
);
901 if (this->components
.is_empty())
904 exec_node
*node
= this->components
.head
;
905 for (int i
= 0; i
< idx
; i
++) {
908 /* If the end of the list is encountered before the element matching the
909 * requested field is found, return NULL.
911 if (node
->is_tail_sentinel())
915 return (ir_constant
*) node
;
919 ir_constant::copy_offset(ir_constant
*src
, int offset
)
921 switch (this->type
->base_type
) {
924 case GLSL_TYPE_FLOAT
:
925 case GLSL_TYPE_BOOL
: {
926 unsigned int size
= src
->type
->components();
927 assert (size
<= this->type
->components() - offset
);
928 for (unsigned int i
=0; i
<size
; i
++) {
929 switch (this->type
->base_type
) {
931 value
.u
[i
+offset
] = src
->get_uint_component(i
);
934 value
.i
[i
+offset
] = src
->get_int_component(i
);
936 case GLSL_TYPE_FLOAT
:
937 value
.f
[i
+offset
] = src
->get_float_component(i
);
940 value
.b
[i
+offset
] = src
->get_bool_component(i
);
942 default: // Shut up the compiler
949 case GLSL_TYPE_STRUCT
: {
950 assert (src
->type
== this->type
);
951 this->components
.make_empty();
952 foreach_list(node
, &src
->components
) {
953 ir_constant
*const orig
= (ir_constant
*) node
;
955 this->components
.push_tail(orig
->clone(this, NULL
));
960 case GLSL_TYPE_ARRAY
: {
961 assert (src
->type
== this->type
);
962 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
963 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
969 assert(!"Should not get here.");
975 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
977 assert (!type
->is_array() && !type
->is_record());
979 if (!type
->is_vector() && !type
->is_matrix()) {
985 for (int i
=0; i
<4; i
++) {
986 if (mask
& (1 << i
)) {
987 switch (this->type
->base_type
) {
989 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
992 value
.i
[i
+offset
] = src
->get_int_component(id
++);
994 case GLSL_TYPE_FLOAT
:
995 value
.f
[i
+offset
] = src
->get_float_component(id
++);
998 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1001 assert(!"Should not get here.");
1009 ir_constant::has_value(const ir_constant
*c
) const
1011 if (this->type
!= c
->type
)
1014 if (this->type
->is_array()) {
1015 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1016 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1022 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1023 const exec_node
*a_node
= this->components
.head
;
1024 const exec_node
*b_node
= c
->components
.head
;
1026 while (!a_node
->is_tail_sentinel()) {
1027 assert(!b_node
->is_tail_sentinel());
1029 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1030 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1032 if (!a_field
->has_value(b_field
))
1035 a_node
= a_node
->next
;
1036 b_node
= b_node
->next
;
1042 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1043 switch (this->type
->base_type
) {
1044 case GLSL_TYPE_UINT
:
1045 if (this->value
.u
[i
] != c
->value
.u
[i
])
1049 if (this->value
.i
[i
] != c
->value
.i
[i
])
1052 case GLSL_TYPE_FLOAT
:
1053 if (this->value
.f
[i
] != c
->value
.f
[i
])
1056 case GLSL_TYPE_BOOL
:
1057 if (this->value
.b
[i
] != c
->value
.b
[i
])
1061 assert(!"Should not get here.");
1070 ir_constant::is_zero() const
1072 if (!this->type
->is_scalar() && !this->type
->is_vector())
1075 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1076 switch (this->type
->base_type
) {
1077 case GLSL_TYPE_FLOAT
:
1078 if (this->value
.f
[c
] != 0.0)
1082 if (this->value
.i
[c
] != 0)
1085 case GLSL_TYPE_UINT
:
1086 if (this->value
.u
[c
] != 0)
1089 case GLSL_TYPE_BOOL
:
1090 if (this->value
.b
[c
] != false)
1094 /* The only other base types are structures, arrays, and samplers.
1095 * Samplers cannot be constants, and the others should have been
1096 * filtered out above.
1098 assert(!"Should not get here.");
1107 ir_constant::is_one() const
1109 if (!this->type
->is_scalar() && !this->type
->is_vector())
1112 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1113 switch (this->type
->base_type
) {
1114 case GLSL_TYPE_FLOAT
:
1115 if (this->value
.f
[c
] != 1.0)
1119 if (this->value
.i
[c
] != 1)
1122 case GLSL_TYPE_UINT
:
1123 if (this->value
.u
[c
] != 1)
1126 case GLSL_TYPE_BOOL
:
1127 if (this->value
.b
[c
] != true)
1131 /* The only other base types are structures, arrays, and samplers.
1132 * Samplers cannot be constants, and the others should have been
1133 * filtered out above.
1135 assert(!"Should not get here.");
1144 ir_constant::is_negative_one() const
1146 if (!this->type
->is_scalar() && !this->type
->is_vector())
1149 if (this->type
->is_boolean())
1152 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1153 switch (this->type
->base_type
) {
1154 case GLSL_TYPE_FLOAT
:
1155 if (this->value
.f
[c
] != -1.0)
1159 if (this->value
.i
[c
] != -1)
1162 case GLSL_TYPE_UINT
:
1163 if (int(this->value
.u
[c
]) != -1)
1167 /* The only other base types are structures, arrays, samplers, and
1168 * booleans. Samplers cannot be constants, and the others should
1169 * have been filtered out above.
1171 assert(!"Should not get here.");
1180 ir_constant::is_basis() const
1182 if (!this->type
->is_scalar() && !this->type
->is_vector())
1185 if (this->type
->is_boolean())
1189 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1190 switch (this->type
->base_type
) {
1191 case GLSL_TYPE_FLOAT
:
1192 if (this->value
.f
[c
] == 1.0)
1194 else if (this->value
.f
[c
] != 0.0)
1198 if (this->value
.i
[c
] == 1)
1200 else if (this->value
.i
[c
] != 0)
1203 case GLSL_TYPE_UINT
:
1204 if (int(this->value
.u
[c
]) == 1)
1206 else if (int(this->value
.u
[c
]) != 0)
1210 /* The only other base types are structures, arrays, samplers, and
1211 * booleans. Samplers cannot be constants, and the others should
1212 * have been filtered out above.
1214 assert(!"Should not get here.");
1224 this->ir_type
= ir_type_loop
;
1225 this->cmp
= ir_unop_neg
;
1228 this->increment
= NULL
;
1229 this->counter
= NULL
;
1233 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1235 assert(var
!= NULL
);
1237 this->ir_type
= ir_type_dereference_variable
;
1239 this->type
= var
->type
;
1243 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1244 ir_rvalue
*array_index
)
1246 this->ir_type
= ir_type_dereference_array
;
1247 this->array_index
= array_index
;
1248 this->set_array(value
);
1252 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1253 ir_rvalue
*array_index
)
1255 void *ctx
= ralloc_parent(var
);
1257 this->ir_type
= ir_type_dereference_array
;
1258 this->array_index
= array_index
;
1259 this->set_array(new(ctx
) ir_dereference_variable(var
));
1264 ir_dereference_array::set_array(ir_rvalue
*value
)
1266 assert(value
!= NULL
);
1268 this->array
= value
;
1270 const glsl_type
*const vt
= this->array
->type
;
1272 if (vt
->is_array()) {
1273 type
= vt
->element_type();
1274 } else if (vt
->is_matrix()) {
1275 type
= vt
->column_type();
1276 } else if (vt
->is_vector()) {
1277 type
= vt
->get_base_type();
1282 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1285 assert(value
!= NULL
);
1287 this->ir_type
= ir_type_dereference_record
;
1288 this->record
= value
;
1289 this->field
= ralloc_strdup(this, field
);
1290 this->type
= this->record
->type
->field_type(field
);
1294 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1297 void *ctx
= ralloc_parent(var
);
1299 this->ir_type
= ir_type_dereference_record
;
1300 this->record
= new(ctx
) ir_dereference_variable(var
);
1301 this->field
= ralloc_strdup(this, field
);
1302 this->type
= this->record
->type
->field_type(field
);
1306 ir_dereference::is_lvalue() const
1308 ir_variable
*var
= this->variable_referenced();
1310 /* Every l-value derference chain eventually ends in a variable.
1312 if ((var
== NULL
) || var
->read_only
)
1315 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1317 * "Samplers cannot be treated as l-values; hence cannot be used
1318 * as out or inout function parameters, nor can they be
1321 if (this->type
->contains_sampler())
1328 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txs" };
1330 const char *ir_texture::opcode_string()
1332 assert((unsigned int) op
<=
1333 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1334 return tex_opcode_strs
[op
];
1338 ir_texture::get_opcode(const char *str
)
1340 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1341 for (int op
= 0; op
< count
; op
++) {
1342 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1343 return (ir_texture_opcode
) op
;
1345 return (ir_texture_opcode
) -1;
1350 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1352 assert(sampler
!= NULL
);
1353 assert(type
!= NULL
);
1354 this->sampler
= sampler
;
1357 if (this->op
== ir_txs
) {
1358 assert(type
->base_type
== GLSL_TYPE_INT
);
1360 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1361 if (sampler
->type
->sampler_shadow
)
1362 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1364 assert(type
->vector_elements
== 4);
1370 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1372 assert((count
>= 1) && (count
<= 4));
1374 memset(&this->mask
, 0, sizeof(this->mask
));
1375 this->mask
.num_components
= count
;
1377 unsigned dup_mask
= 0;
1380 assert(comp
[3] <= 3);
1381 dup_mask
|= (1U << comp
[3])
1382 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1383 this->mask
.w
= comp
[3];
1386 assert(comp
[2] <= 3);
1387 dup_mask
|= (1U << comp
[2])
1388 & ((1U << comp
[0]) | (1U << comp
[1]));
1389 this->mask
.z
= comp
[2];
1392 assert(comp
[1] <= 3);
1393 dup_mask
|= (1U << comp
[1])
1394 & ((1U << comp
[0]));
1395 this->mask
.y
= comp
[1];
1398 assert(comp
[0] <= 3);
1399 this->mask
.x
= comp
[0];
1402 this->mask
.has_duplicates
= dup_mask
!= 0;
1404 /* Based on the number of elements in the swizzle and the base type
1405 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1406 * generate the type of the resulting value.
1408 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1411 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1412 unsigned w
, unsigned count
)
1415 const unsigned components
[4] = { x
, y
, z
, w
};
1416 this->ir_type
= ir_type_swizzle
;
1417 this->init_mask(components
, count
);
1420 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1424 this->ir_type
= ir_type_swizzle
;
1425 this->init_mask(comp
, count
);
1428 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1430 this->ir_type
= ir_type_swizzle
;
1433 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1434 mask
.num_components
, 1);
1443 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1445 void *ctx
= ralloc_parent(val
);
1447 /* For each possible swizzle character, this table encodes the value in
1448 * \c idx_map that represents the 0th element of the vector. For invalid
1449 * swizzle characters (e.g., 'k'), a special value is used that will allow
1450 * detection of errors.
1452 static const unsigned char base_idx
[26] = {
1453 /* a b c d e f g h i j k l m */
1454 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1455 /* n o p q r s t u v w x y z */
1456 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1459 /* Each valid swizzle character has an entry in the previous table. This
1460 * table encodes the base index encoded in the previous table plus the actual
1461 * index of the swizzle character. When processing swizzles, the first
1462 * character in the string is indexed in the previous table. Each character
1463 * in the string is indexed in this table, and the value found there has the
1464 * value form the first table subtracted. The result must be on the range
1467 * For example, the string "wzyx" will get X from the first table. Each of
1468 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1469 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1471 * The string "wzrg" will get X from the first table. Each of the characters
1472 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1473 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1474 * [0,3], the error is detected.
1476 static const unsigned char idx_map
[26] = {
1477 /* a b c d e f g h i j k l m */
1478 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1479 /* n o p q r s t u v w x y z */
1480 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1483 int swiz_idx
[4] = { 0, 0, 0, 0 };
1487 /* Validate the first character in the swizzle string and look up the base
1488 * index value as described above.
1490 if ((str
[0] < 'a') || (str
[0] > 'z'))
1493 const unsigned base
= base_idx
[str
[0] - 'a'];
1496 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1497 /* Validate the next character, and, as described above, convert it to a
1500 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1503 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1504 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1511 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1521 ir_swizzle::variable_referenced() const
1523 return this->val
->variable_referenced();
1527 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1528 ir_variable_mode mode
)
1529 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1530 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1532 this->ir_type
= ir_type_variable
;
1534 this->name
= ralloc_strdup(this, name
);
1535 this->explicit_location
= false;
1536 this->has_initializer
= false;
1537 this->location
= -1;
1538 this->location_frac
= 0;
1539 this->warn_extension
= NULL
;
1540 this->constant_value
= NULL
;
1541 this->constant_initializer
= NULL
;
1542 this->origin_upper_left
= false;
1543 this->pixel_center_integer
= false;
1544 this->depth_layout
= ir_depth_layout_none
;
1547 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1548 this->read_only
= true;
1553 ir_variable::interpolation_string() const
1555 switch (this->interpolation
) {
1556 case INTERP_QUALIFIER_NONE
: return "no";
1557 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1558 case INTERP_QUALIFIER_FLAT
: return "flat";
1559 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1562 assert(!"Should not get here.");
1567 glsl_interp_qualifier
1568 ir_variable::determine_interpolation_mode(bool flat_shade
)
1570 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1571 return (glsl_interp_qualifier
) this->interpolation
;
1572 int location
= this->location
;
1574 location
== FRAG_ATTRIB_COL0
|| location
== FRAG_ATTRIB_COL1
;
1575 if (flat_shade
&& is_gl_Color
)
1576 return INTERP_QUALIFIER_FLAT
;
1578 return INTERP_QUALIFIER_SMOOTH
;
1582 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1583 : return_type(return_type
), is_defined(false), _function(NULL
)
1585 this->ir_type
= ir_type_function_signature
;
1586 this->is_builtin
= false;
1587 this->origin
= NULL
;
1592 modes_match(unsigned a
, unsigned b
)
1597 /* Accept "in" vs. "const in" */
1598 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1599 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1607 ir_function_signature::qualifiers_match(exec_list
*params
)
1609 exec_list_iterator iter_a
= parameters
.iterator();
1610 exec_list_iterator iter_b
= params
->iterator();
1612 /* check that the qualifiers match. */
1613 while (iter_a
.has_next()) {
1614 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1615 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1617 if (a
->read_only
!= b
->read_only
||
1618 !modes_match(a
->mode
, b
->mode
) ||
1619 a
->interpolation
!= b
->interpolation
||
1620 a
->centroid
!= b
->centroid
) {
1622 /* parameter a's qualifiers don't match */
1634 ir_function_signature::replace_parameters(exec_list
*new_params
)
1636 /* Destroy all of the previous parameter information. If the previous
1637 * parameter information comes from the function prototype, it may either
1638 * specify incorrect parameter names or not have names at all.
1640 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1641 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1646 new_params
->move_nodes_to(¶meters
);
1650 ir_function::ir_function(const char *name
)
1652 this->ir_type
= ir_type_function
;
1653 this->name
= ralloc_strdup(this, name
);
1658 ir_function::has_user_signature()
1660 foreach_list(n
, &this->signatures
) {
1661 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1662 if (!sig
->is_builtin
)
1670 ir_rvalue::error_value(void *mem_ctx
)
1672 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1674 v
->type
= glsl_type::error_type
;
1680 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1682 foreach_iter(exec_list_iterator
, iter
, *list
) {
1683 ((ir_instruction
*)iter
.get())->accept(visitor
);
1689 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1691 ir_variable
*var
= ir
->as_variable();
1692 ir_constant
*constant
= ir
->as_constant();
1693 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1694 steal_memory(var
->constant_value
, ir
);
1696 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1697 steal_memory(var
->constant_initializer
, ir
);
1699 /* The components of aggregate constants are not visited by the normal
1700 * visitor, so steal their values by hand.
1702 if (constant
!= NULL
) {
1703 if (constant
->type
->is_record()) {
1704 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1705 ir_constant
*field
= (ir_constant
*)iter
.get();
1706 steal_memory(field
, ir
);
1708 } else if (constant
->type
->is_array()) {
1709 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1710 steal_memory(constant
->array_elements
[i
], ir
);
1715 ralloc_steal(new_ctx
, ir
);
1720 reparent_ir(exec_list
*list
, void *mem_ctx
)
1722 foreach_list(node
, list
) {
1723 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1729 try_min_one(ir_rvalue
*ir
)
1731 ir_expression
*expr
= ir
->as_expression();
1733 if (!expr
|| expr
->operation
!= ir_binop_min
)
1736 if (expr
->operands
[0]->is_one())
1737 return expr
->operands
[1];
1739 if (expr
->operands
[1]->is_one())
1740 return expr
->operands
[0];
1746 try_max_zero(ir_rvalue
*ir
)
1748 ir_expression
*expr
= ir
->as_expression();
1750 if (!expr
|| expr
->operation
!= ir_binop_max
)
1753 if (expr
->operands
[0]->is_zero())
1754 return expr
->operands
[1];
1756 if (expr
->operands
[1]->is_zero())
1757 return expr
->operands
[0];
1763 ir_rvalue::as_rvalue_to_saturate()
1765 ir_expression
*expr
= this->as_expression();
1770 ir_rvalue
*max_zero
= try_max_zero(expr
);
1772 return try_min_one(max_zero
);
1774 ir_rvalue
*min_one
= try_min_one(expr
);
1776 return try_max_zero(min_one
);