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;
198 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
199 ir_rvalue
*op0
, ir_rvalue
*op1
,
200 ir_rvalue
*op2
, ir_rvalue
*op3
)
202 this->ir_type
= ir_type_expression
;
204 this->operation
= ir_expression_operation(op
);
205 this->operands
[0] = op0
;
206 this->operands
[1] = op1
;
207 this->operands
[2] = op2
;
208 this->operands
[3] = op3
;
210 int num_operands
= get_num_operands(this->operation
);
211 for (int i
= num_operands
; i
< 4; i
++) {
212 assert(this->operands
[i
] == NULL
);
217 ir_expression::ir_expression(int op
, ir_rvalue
*op0
)
219 this->ir_type
= ir_type_expression
;
221 this->operation
= ir_expression_operation(op
);
222 this->operands
[0] = op0
;
223 this->operands
[1] = NULL
;
224 this->operands
[2] = NULL
;
225 this->operands
[3] = NULL
;
227 assert(op
<= ir_last_unop
);
229 switch (this->operation
) {
230 case ir_unop_bit_not
:
231 case ir_unop_logic_not
:
246 case ir_unop_round_even
:
249 case ir_unop_sin_reduced
:
250 case ir_unop_cos_reduced
:
253 case ir_unop_bitfield_reverse
:
254 this->type
= op0
->type
;
260 case ir_unop_bitcast_f2i
:
261 case ir_unop_bit_count
:
262 case ir_unop_find_msb
:
263 case ir_unop_find_lsb
:
264 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
265 op0
->type
->vector_elements
, 1);
271 case ir_unop_bitcast_i2f
:
272 case ir_unop_bitcast_u2f
:
273 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
274 op0
->type
->vector_elements
, 1);
279 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
280 op0
->type
->vector_elements
, 1);
285 case ir_unop_bitcast_f2u
:
286 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
287 op0
->type
->vector_elements
, 1);
291 case ir_unop_unpack_half_2x16_split_x
:
292 case ir_unop_unpack_half_2x16_split_y
:
293 this->type
= glsl_type::float_type
;
297 this->type
= glsl_type::bool_type
;
300 case ir_unop_pack_snorm_2x16
:
301 case ir_unop_pack_snorm_4x8
:
302 case ir_unop_pack_unorm_2x16
:
303 case ir_unop_pack_unorm_4x8
:
304 case ir_unop_pack_half_2x16
:
305 this->type
= glsl_type::uint_type
;
308 case ir_unop_unpack_snorm_2x16
:
309 case ir_unop_unpack_unorm_2x16
:
310 case ir_unop_unpack_half_2x16
:
311 this->type
= glsl_type::vec2_type
;
314 case ir_unop_unpack_snorm_4x8
:
315 case ir_unop_unpack_unorm_4x8
:
316 this->type
= glsl_type::vec4_type
;
320 assert(!"not reached: missing automatic type setup for ir_expression");
321 this->type
= op0
->type
;
326 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
328 this->ir_type
= ir_type_expression
;
330 this->operation
= ir_expression_operation(op
);
331 this->operands
[0] = op0
;
332 this->operands
[1] = op1
;
333 this->operands
[2] = NULL
;
334 this->operands
[3] = NULL
;
336 assert(op
> ir_last_unop
);
338 switch (this->operation
) {
339 case ir_binop_all_equal
:
340 case ir_binop_any_nequal
:
341 this->type
= glsl_type::bool_type
;
352 if (op0
->type
->is_scalar()) {
353 this->type
= op1
->type
;
354 } else if (op1
->type
->is_scalar()) {
355 this->type
= op0
->type
;
357 /* FINISHME: matrix types */
358 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
359 assert(op0
->type
== op1
->type
);
360 this->type
= op0
->type
;
364 case ir_binop_logic_and
:
365 case ir_binop_logic_xor
:
366 case ir_binop_logic_or
:
367 case ir_binop_bit_and
:
368 case ir_binop_bit_xor
:
369 case ir_binop_bit_or
:
370 assert(!op0
->type
->is_matrix());
371 assert(!op1
->type
->is_matrix());
372 if (op0
->type
->is_scalar()) {
373 this->type
= op1
->type
;
374 } else if (op1
->type
->is_scalar()) {
375 this->type
= op0
->type
;
377 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
378 this->type
= op0
->type
;
383 case ir_binop_nequal
:
384 case ir_binop_lequal
:
385 case ir_binop_gequal
:
387 case ir_binop_greater
:
388 assert(op0
->type
== op1
->type
);
389 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
390 op0
->type
->vector_elements
, 1);
394 this->type
= glsl_type::float_type
;
397 case ir_binop_pack_half_2x16_split
:
398 this->type
= glsl_type::uint_type
;
401 case ir_binop_lshift
:
402 case ir_binop_rshift
:
404 this->type
= op0
->type
;
407 case ir_binop_vector_extract
:
408 this->type
= op0
->type
->get_scalar_type();
412 assert(!"not reached: missing automatic type setup for ir_expression");
413 this->type
= glsl_type::float_type
;
417 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
420 this->ir_type
= ir_type_expression
;
422 this->operation
= ir_expression_operation(op
);
423 this->operands
[0] = op0
;
424 this->operands
[1] = op1
;
425 this->operands
[2] = op2
;
426 this->operands
[3] = NULL
;
428 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
430 switch (this->operation
) {
433 case ir_triop_bitfield_extract
:
434 case ir_triop_vector_insert
:
435 this->type
= op0
->type
;
440 this->type
= op1
->type
;
444 assert(!"not reached: missing automatic type setup for ir_expression");
445 this->type
= glsl_type::float_type
;
450 ir_expression::get_num_operands(ir_expression_operation op
)
452 assert(op
<= ir_last_opcode
);
454 if (op
<= ir_last_unop
)
457 if (op
<= ir_last_binop
)
460 if (op
<= ir_last_triop
)
463 if (op
<= ir_last_quadop
)
470 static const char *const operator_strs
[] = {
519 "unpackHalf2x16_split_x",
520 "unpackHalf2x16_split_y",
551 "packHalf2x16_split",
565 const char *ir_expression::operator_string(ir_expression_operation op
)
567 assert((unsigned int) op
< Elements(operator_strs
));
568 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
569 return operator_strs
[op
];
572 const char *ir_expression::operator_string()
574 return operator_string(this->operation
);
578 depth_layout_string(ir_depth_layout layout
)
581 case ir_depth_layout_none
: return "";
582 case ir_depth_layout_any
: return "depth_any";
583 case ir_depth_layout_greater
: return "depth_greater";
584 case ir_depth_layout_less
: return "depth_less";
585 case ir_depth_layout_unchanged
: return "depth_unchanged";
593 ir_expression_operation
594 ir_expression::get_operator(const char *str
)
596 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
597 for (int op
= 0; op
< operator_count
; op
++) {
598 if (strcmp(str
, operator_strs
[op
]) == 0)
599 return (ir_expression_operation
) op
;
601 return (ir_expression_operation
) -1;
604 ir_constant::ir_constant()
606 this->ir_type
= ir_type_constant
;
609 ir_constant::ir_constant(const struct glsl_type
*type
,
610 const ir_constant_data
*data
)
612 assert((type
->base_type
>= GLSL_TYPE_UINT
)
613 && (type
->base_type
<= GLSL_TYPE_BOOL
));
615 this->ir_type
= ir_type_constant
;
617 memcpy(& this->value
, data
, sizeof(this->value
));
620 ir_constant::ir_constant(float f
)
622 this->ir_type
= ir_type_constant
;
623 this->type
= glsl_type::float_type
;
624 this->value
.f
[0] = f
;
625 for (int i
= 1; i
< 16; i
++) {
626 this->value
.f
[i
] = 0;
630 ir_constant::ir_constant(unsigned int u
)
632 this->ir_type
= ir_type_constant
;
633 this->type
= glsl_type::uint_type
;
634 this->value
.u
[0] = u
;
635 for (int i
= 1; i
< 16; i
++) {
636 this->value
.u
[i
] = 0;
640 ir_constant::ir_constant(int i
)
642 this->ir_type
= ir_type_constant
;
643 this->type
= glsl_type::int_type
;
644 this->value
.i
[0] = i
;
645 for (int i
= 1; i
< 16; i
++) {
646 this->value
.i
[i
] = 0;
650 ir_constant::ir_constant(bool b
)
652 this->ir_type
= ir_type_constant
;
653 this->type
= glsl_type::bool_type
;
654 this->value
.b
[0] = b
;
655 for (int i
= 1; i
< 16; i
++) {
656 this->value
.b
[i
] = false;
660 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
662 this->ir_type
= ir_type_constant
;
663 this->type
= c
->type
->get_base_type();
665 switch (this->type
->base_type
) {
666 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
667 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
668 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
669 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
670 default: assert(!"Should not get here."); break;
674 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
676 this->ir_type
= ir_type_constant
;
679 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
680 || type
->is_record() || type
->is_array());
682 if (type
->is_array()) {
683 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
685 foreach_list(node
, value_list
) {
686 ir_constant
*value
= (ir_constant
*) node
;
687 assert(value
->as_constant() != NULL
);
689 this->array_elements
[i
++] = value
;
694 /* If the constant is a record, the types of each of the entries in
695 * value_list must be a 1-for-1 match with the structure components. Each
696 * entry must also be a constant. Just move the nodes from the value_list
697 * to the list in the ir_constant.
699 /* FINISHME: Should there be some type checking and / or assertions here? */
700 /* FINISHME: Should the new constant take ownership of the nodes from
701 * FINISHME: value_list, or should it make copies?
703 if (type
->is_record()) {
704 value_list
->move_nodes_to(& this->components
);
708 for (unsigned i
= 0; i
< 16; i
++) {
709 this->value
.u
[i
] = 0;
712 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
714 /* Constructors with exactly one scalar argument are special for vectors
715 * and matrices. For vectors, the scalar value is replicated to fill all
716 * the components. For matrices, the scalar fills the components of the
717 * diagonal while the rest is filled with 0.
719 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
720 if (type
->is_matrix()) {
721 /* Matrix - fill diagonal (rest is already set to 0) */
722 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
723 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
724 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
726 /* Vector or scalar - fill all components */
727 switch (type
->base_type
) {
730 for (unsigned i
= 0; i
< type
->components(); i
++)
731 this->value
.u
[i
] = value
->value
.u
[0];
733 case GLSL_TYPE_FLOAT
:
734 for (unsigned i
= 0; i
< type
->components(); i
++)
735 this->value
.f
[i
] = value
->value
.f
[0];
738 for (unsigned i
= 0; i
< type
->components(); i
++)
739 this->value
.b
[i
] = value
->value
.b
[0];
742 assert(!"Should not get here.");
749 if (type
->is_matrix() && value
->type
->is_matrix()) {
750 assert(value
->next
->is_tail_sentinel());
752 /* From section 5.4.2 of the GLSL 1.20 spec:
753 * "If a matrix is constructed from a matrix, then each component
754 * (column i, row j) in the result that has a corresponding component
755 * (column i, row j) in the argument will be initialized from there."
757 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
758 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
759 for (unsigned i
= 0; i
< cols
; i
++) {
760 for (unsigned j
= 0; j
< rows
; j
++) {
761 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
762 const unsigned dst
= i
* type
->vector_elements
+ j
;
763 this->value
.f
[dst
] = value
->value
.f
[src
];
767 /* "All other components will be initialized to the identity matrix." */
768 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
769 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
774 /* Use each component from each entry in the value_list to initialize one
775 * component of the constant being constructed.
777 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
778 assert(value
->as_constant() != NULL
);
779 assert(!value
->is_tail_sentinel());
781 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
782 switch (type
->base_type
) {
784 this->value
.u
[i
] = value
->get_uint_component(j
);
787 this->value
.i
[i
] = value
->get_int_component(j
);
789 case GLSL_TYPE_FLOAT
:
790 this->value
.f
[i
] = value
->get_float_component(j
);
793 this->value
.b
[i
] = value
->get_bool_component(j
);
796 /* FINISHME: What to do? Exceptions are not the answer.
802 if (i
>= type
->components())
806 value
= (ir_constant
*) value
->next
;
811 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
813 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
814 || type
->is_record() || type
->is_array());
816 ir_constant
*c
= new(mem_ctx
) ir_constant
;
818 memset(&c
->value
, 0, sizeof(c
->value
));
820 if (type
->is_array()) {
821 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
823 for (unsigned i
= 0; i
< type
->length
; i
++)
824 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
827 if (type
->is_record()) {
828 for (unsigned i
= 0; i
< type
->length
; i
++) {
829 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
830 c
->components
.push_tail(comp
);
838 ir_constant::get_bool_component(unsigned i
) const
840 switch (this->type
->base_type
) {
841 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
842 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
843 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
844 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
845 default: assert(!"Should not get here."); break;
848 /* Must return something to make the compiler happy. This is clearly an
855 ir_constant::get_float_component(unsigned i
) const
857 switch (this->type
->base_type
) {
858 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
859 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
860 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
861 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
862 default: assert(!"Should not get here."); break;
865 /* Must return something to make the compiler happy. This is clearly an
872 ir_constant::get_int_component(unsigned i
) const
874 switch (this->type
->base_type
) {
875 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
876 case GLSL_TYPE_INT
: return this->value
.i
[i
];
877 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
878 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
879 default: assert(!"Should not get here."); break;
882 /* Must return something to make the compiler happy. This is clearly an
889 ir_constant::get_uint_component(unsigned i
) const
891 switch (this->type
->base_type
) {
892 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
893 case GLSL_TYPE_INT
: return this->value
.i
[i
];
894 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
895 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
896 default: assert(!"Should not get here."); break;
899 /* Must return something to make the compiler happy. This is clearly an
906 ir_constant::get_array_element(unsigned i
) const
908 assert(this->type
->is_array());
910 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
912 * "Behavior is undefined if a shader subscripts an array with an index
913 * less than 0 or greater than or equal to the size the array was
916 * Most out-of-bounds accesses are removed before things could get this far.
917 * There are cases where non-constant array index values can get constant
922 else if (i
>= this->type
->length
)
923 i
= this->type
->length
- 1;
925 return array_elements
[i
];
929 ir_constant::get_record_field(const char *name
)
931 int idx
= this->type
->field_index(name
);
936 if (this->components
.is_empty())
939 exec_node
*node
= this->components
.head
;
940 for (int i
= 0; i
< idx
; i
++) {
943 /* If the end of the list is encountered before the element matching the
944 * requested field is found, return NULL.
946 if (node
->is_tail_sentinel())
950 return (ir_constant
*) node
;
954 ir_constant::copy_offset(ir_constant
*src
, int offset
)
956 switch (this->type
->base_type
) {
959 case GLSL_TYPE_FLOAT
:
960 case GLSL_TYPE_BOOL
: {
961 unsigned int size
= src
->type
->components();
962 assert (size
<= this->type
->components() - offset
);
963 for (unsigned int i
=0; i
<size
; i
++) {
964 switch (this->type
->base_type
) {
966 value
.u
[i
+offset
] = src
->get_uint_component(i
);
969 value
.i
[i
+offset
] = src
->get_int_component(i
);
971 case GLSL_TYPE_FLOAT
:
972 value
.f
[i
+offset
] = src
->get_float_component(i
);
975 value
.b
[i
+offset
] = src
->get_bool_component(i
);
977 default: // Shut up the compiler
984 case GLSL_TYPE_STRUCT
: {
985 assert (src
->type
== this->type
);
986 this->components
.make_empty();
987 foreach_list(node
, &src
->components
) {
988 ir_constant
*const orig
= (ir_constant
*) node
;
990 this->components
.push_tail(orig
->clone(this, NULL
));
995 case GLSL_TYPE_ARRAY
: {
996 assert (src
->type
== this->type
);
997 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
998 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1004 assert(!"Should not get here.");
1010 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1012 assert (!type
->is_array() && !type
->is_record());
1014 if (!type
->is_vector() && !type
->is_matrix()) {
1020 for (int i
=0; i
<4; i
++) {
1021 if (mask
& (1 << i
)) {
1022 switch (this->type
->base_type
) {
1023 case GLSL_TYPE_UINT
:
1024 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1027 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1029 case GLSL_TYPE_FLOAT
:
1030 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1032 case GLSL_TYPE_BOOL
:
1033 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1036 assert(!"Should not get here.");
1044 ir_constant::has_value(const ir_constant
*c
) const
1046 if (this->type
!= c
->type
)
1049 if (this->type
->is_array()) {
1050 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1051 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1057 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1058 const exec_node
*a_node
= this->components
.head
;
1059 const exec_node
*b_node
= c
->components
.head
;
1061 while (!a_node
->is_tail_sentinel()) {
1062 assert(!b_node
->is_tail_sentinel());
1064 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1065 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1067 if (!a_field
->has_value(b_field
))
1070 a_node
= a_node
->next
;
1071 b_node
= b_node
->next
;
1077 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1078 switch (this->type
->base_type
) {
1079 case GLSL_TYPE_UINT
:
1080 if (this->value
.u
[i
] != c
->value
.u
[i
])
1084 if (this->value
.i
[i
] != c
->value
.i
[i
])
1087 case GLSL_TYPE_FLOAT
:
1088 if (this->value
.f
[i
] != c
->value
.f
[i
])
1091 case GLSL_TYPE_BOOL
:
1092 if (this->value
.b
[i
] != c
->value
.b
[i
])
1096 assert(!"Should not get here.");
1105 ir_constant::is_zero() const
1107 if (!this->type
->is_scalar() && !this->type
->is_vector())
1110 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1111 switch (this->type
->base_type
) {
1112 case GLSL_TYPE_FLOAT
:
1113 if (this->value
.f
[c
] != 0.0)
1117 if (this->value
.i
[c
] != 0)
1120 case GLSL_TYPE_UINT
:
1121 if (this->value
.u
[c
] != 0)
1124 case GLSL_TYPE_BOOL
:
1125 if (this->value
.b
[c
] != false)
1129 /* The only other base types are structures, arrays, and samplers.
1130 * Samplers cannot be constants, and the others should have been
1131 * filtered out above.
1133 assert(!"Should not get here.");
1142 ir_constant::is_one() const
1144 if (!this->type
->is_scalar() && !this->type
->is_vector())
1147 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1148 switch (this->type
->base_type
) {
1149 case GLSL_TYPE_FLOAT
:
1150 if (this->value
.f
[c
] != 1.0)
1154 if (this->value
.i
[c
] != 1)
1157 case GLSL_TYPE_UINT
:
1158 if (this->value
.u
[c
] != 1)
1161 case GLSL_TYPE_BOOL
:
1162 if (this->value
.b
[c
] != true)
1166 /* The only other base types are structures, arrays, and samplers.
1167 * Samplers cannot be constants, and the others should have been
1168 * filtered out above.
1170 assert(!"Should not get here.");
1179 ir_constant::is_negative_one() const
1181 if (!this->type
->is_scalar() && !this->type
->is_vector())
1184 if (this->type
->is_boolean())
1187 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1188 switch (this->type
->base_type
) {
1189 case GLSL_TYPE_FLOAT
:
1190 if (this->value
.f
[c
] != -1.0)
1194 if (this->value
.i
[c
] != -1)
1197 case GLSL_TYPE_UINT
:
1198 if (int(this->value
.u
[c
]) != -1)
1202 /* The only other base types are structures, arrays, samplers, and
1203 * booleans. Samplers cannot be constants, and the others should
1204 * have been filtered out above.
1206 assert(!"Should not get here.");
1215 ir_constant::is_basis() const
1217 if (!this->type
->is_scalar() && !this->type
->is_vector())
1220 if (this->type
->is_boolean())
1224 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1225 switch (this->type
->base_type
) {
1226 case GLSL_TYPE_FLOAT
:
1227 if (this->value
.f
[c
] == 1.0)
1229 else if (this->value
.f
[c
] != 0.0)
1233 if (this->value
.i
[c
] == 1)
1235 else if (this->value
.i
[c
] != 0)
1238 case GLSL_TYPE_UINT
:
1239 if (int(this->value
.u
[c
]) == 1)
1241 else if (int(this->value
.u
[c
]) != 0)
1245 /* The only other base types are structures, arrays, samplers, and
1246 * booleans. Samplers cannot be constants, and the others should
1247 * have been filtered out above.
1249 assert(!"Should not get here.");
1259 this->ir_type
= ir_type_loop
;
1260 this->cmp
= ir_unop_neg
;
1263 this->increment
= NULL
;
1264 this->counter
= NULL
;
1268 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1270 assert(var
!= NULL
);
1272 this->ir_type
= ir_type_dereference_variable
;
1274 this->type
= var
->type
;
1278 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1279 ir_rvalue
*array_index
)
1281 this->ir_type
= ir_type_dereference_array
;
1282 this->array_index
= array_index
;
1283 this->set_array(value
);
1287 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1288 ir_rvalue
*array_index
)
1290 void *ctx
= ralloc_parent(var
);
1292 this->ir_type
= ir_type_dereference_array
;
1293 this->array_index
= array_index
;
1294 this->set_array(new(ctx
) ir_dereference_variable(var
));
1299 ir_dereference_array::set_array(ir_rvalue
*value
)
1301 assert(value
!= NULL
);
1303 this->array
= value
;
1305 const glsl_type
*const vt
= this->array
->type
;
1307 if (vt
->is_array()) {
1308 type
= vt
->element_type();
1309 } else if (vt
->is_matrix()) {
1310 type
= vt
->column_type();
1311 } else if (vt
->is_vector()) {
1312 type
= vt
->get_base_type();
1317 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1320 assert(value
!= NULL
);
1322 this->ir_type
= ir_type_dereference_record
;
1323 this->record
= value
;
1324 this->field
= ralloc_strdup(this, field
);
1325 this->type
= this->record
->type
->field_type(field
);
1329 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1332 void *ctx
= ralloc_parent(var
);
1334 this->ir_type
= ir_type_dereference_record
;
1335 this->record
= new(ctx
) ir_dereference_variable(var
);
1336 this->field
= ralloc_strdup(this, field
);
1337 this->type
= this->record
->type
->field_type(field
);
1341 ir_dereference::is_lvalue() const
1343 ir_variable
*var
= this->variable_referenced();
1345 /* Every l-value derference chain eventually ends in a variable.
1347 if ((var
== NULL
) || var
->read_only
)
1350 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1352 * "Samplers cannot be treated as l-values; hence cannot be used
1353 * as out or inout function parameters, nor can they be
1356 if (this->type
->contains_sampler())
1363 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod" };
1365 const char *ir_texture::opcode_string()
1367 assert((unsigned int) op
<=
1368 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1369 return tex_opcode_strs
[op
];
1373 ir_texture::get_opcode(const char *str
)
1375 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1376 for (int op
= 0; op
< count
; op
++) {
1377 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1378 return (ir_texture_opcode
) op
;
1380 return (ir_texture_opcode
) -1;
1385 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1387 assert(sampler
!= NULL
);
1388 assert(type
!= NULL
);
1389 this->sampler
= sampler
;
1392 if (this->op
== ir_txs
) {
1393 assert(type
->base_type
== GLSL_TYPE_INT
);
1394 } else if (this->op
== ir_lod
) {
1395 assert(type
->vector_elements
== 2);
1396 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1398 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1399 if (sampler
->type
->sampler_shadow
)
1400 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1402 assert(type
->vector_elements
== 4);
1408 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1410 assert((count
>= 1) && (count
<= 4));
1412 memset(&this->mask
, 0, sizeof(this->mask
));
1413 this->mask
.num_components
= count
;
1415 unsigned dup_mask
= 0;
1418 assert(comp
[3] <= 3);
1419 dup_mask
|= (1U << comp
[3])
1420 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1421 this->mask
.w
= comp
[3];
1424 assert(comp
[2] <= 3);
1425 dup_mask
|= (1U << comp
[2])
1426 & ((1U << comp
[0]) | (1U << comp
[1]));
1427 this->mask
.z
= comp
[2];
1430 assert(comp
[1] <= 3);
1431 dup_mask
|= (1U << comp
[1])
1432 & ((1U << comp
[0]));
1433 this->mask
.y
= comp
[1];
1436 assert(comp
[0] <= 3);
1437 this->mask
.x
= comp
[0];
1440 this->mask
.has_duplicates
= dup_mask
!= 0;
1442 /* Based on the number of elements in the swizzle and the base type
1443 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1444 * generate the type of the resulting value.
1446 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1449 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1450 unsigned w
, unsigned count
)
1453 const unsigned components
[4] = { x
, y
, z
, w
};
1454 this->ir_type
= ir_type_swizzle
;
1455 this->init_mask(components
, count
);
1458 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1462 this->ir_type
= ir_type_swizzle
;
1463 this->init_mask(comp
, count
);
1466 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1468 this->ir_type
= ir_type_swizzle
;
1471 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1472 mask
.num_components
, 1);
1481 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1483 void *ctx
= ralloc_parent(val
);
1485 /* For each possible swizzle character, this table encodes the value in
1486 * \c idx_map that represents the 0th element of the vector. For invalid
1487 * swizzle characters (e.g., 'k'), a special value is used that will allow
1488 * detection of errors.
1490 static const unsigned char base_idx
[26] = {
1491 /* a b c d e f g h i j k l m */
1492 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1493 /* n o p q r s t u v w x y z */
1494 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1497 /* Each valid swizzle character has an entry in the previous table. This
1498 * table encodes the base index encoded in the previous table plus the actual
1499 * index of the swizzle character. When processing swizzles, the first
1500 * character in the string is indexed in the previous table. Each character
1501 * in the string is indexed in this table, and the value found there has the
1502 * value form the first table subtracted. The result must be on the range
1505 * For example, the string "wzyx" will get X from the first table. Each of
1506 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1507 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1509 * The string "wzrg" will get X from the first table. Each of the characters
1510 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1511 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1512 * [0,3], the error is detected.
1514 static const unsigned char idx_map
[26] = {
1515 /* a b c d e f g h i j k l m */
1516 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1517 /* n o p q r s t u v w x y z */
1518 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1521 int swiz_idx
[4] = { 0, 0, 0, 0 };
1525 /* Validate the first character in the swizzle string and look up the base
1526 * index value as described above.
1528 if ((str
[0] < 'a') || (str
[0] > 'z'))
1531 const unsigned base
= base_idx
[str
[0] - 'a'];
1534 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1535 /* Validate the next character, and, as described above, convert it to a
1538 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1541 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1542 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1549 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1559 ir_swizzle::variable_referenced() const
1561 return this->val
->variable_referenced();
1565 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1566 ir_variable_mode mode
)
1567 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1568 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1570 this->ir_type
= ir_type_variable
;
1572 this->name
= ralloc_strdup(this, name
);
1573 this->explicit_location
= false;
1574 this->has_initializer
= false;
1575 this->location
= -1;
1576 this->location_frac
= 0;
1577 this->warn_extension
= NULL
;
1578 this->constant_value
= NULL
;
1579 this->constant_initializer
= NULL
;
1580 this->origin_upper_left
= false;
1581 this->pixel_center_integer
= false;
1582 this->depth_layout
= ir_depth_layout_none
;
1585 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1586 this->read_only
= true;
1591 ir_variable::interpolation_string() const
1593 switch (this->interpolation
) {
1594 case INTERP_QUALIFIER_NONE
: return "no";
1595 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1596 case INTERP_QUALIFIER_FLAT
: return "flat";
1597 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1600 assert(!"Should not get here.");
1605 glsl_interp_qualifier
1606 ir_variable::determine_interpolation_mode(bool flat_shade
)
1608 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1609 return (glsl_interp_qualifier
) this->interpolation
;
1610 int location
= this->location
;
1612 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1613 if (flat_shade
&& is_gl_Color
)
1614 return INTERP_QUALIFIER_FLAT
;
1616 return INTERP_QUALIFIER_SMOOTH
;
1620 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1621 builtin_available_predicate b
)
1622 : return_type(return_type
), is_defined(false), builtin_avail(b
),
1625 this->ir_type
= ir_type_function_signature
;
1626 this->origin
= NULL
;
1631 ir_function_signature::is_builtin() const
1633 return builtin_avail
!= NULL
;
1638 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1640 /* We can't call the predicate without a state pointer, so just say that
1641 * the signature is available. At compile time, we need the filtering,
1642 * but also receive a valid state pointer. At link time, we're resolving
1643 * imported built-in prototypes to their definitions, which will always
1644 * be an exact match. So we can skip the filtering.
1649 assert(builtin_avail
!= NULL
);
1650 return builtin_avail(state
);
1655 modes_match(unsigned a
, unsigned b
)
1660 /* Accept "in" vs. "const in" */
1661 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1662 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1670 ir_function_signature::qualifiers_match(exec_list
*params
)
1672 exec_list_iterator iter_a
= parameters
.iterator();
1673 exec_list_iterator iter_b
= params
->iterator();
1675 /* check that the qualifiers match. */
1676 while (iter_a
.has_next()) {
1677 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1678 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1680 if (a
->read_only
!= b
->read_only
||
1681 !modes_match(a
->mode
, b
->mode
) ||
1682 a
->interpolation
!= b
->interpolation
||
1683 a
->centroid
!= b
->centroid
) {
1685 /* parameter a's qualifiers don't match */
1697 ir_function_signature::replace_parameters(exec_list
*new_params
)
1699 /* Destroy all of the previous parameter information. If the previous
1700 * parameter information comes from the function prototype, it may either
1701 * specify incorrect parameter names or not have names at all.
1703 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1704 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1709 new_params
->move_nodes_to(¶meters
);
1713 ir_function::ir_function(const char *name
)
1715 this->ir_type
= ir_type_function
;
1716 this->name
= ralloc_strdup(this, name
);
1721 ir_function::has_user_signature()
1723 foreach_list(n
, &this->signatures
) {
1724 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1725 if (!sig
->is_builtin())
1733 ir_rvalue::error_value(void *mem_ctx
)
1735 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1737 v
->type
= glsl_type::error_type
;
1743 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1745 foreach_iter(exec_list_iterator
, iter
, *list
) {
1746 ((ir_instruction
*)iter
.get())->accept(visitor
);
1752 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1754 ir_variable
*var
= ir
->as_variable();
1755 ir_constant
*constant
= ir
->as_constant();
1756 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1757 steal_memory(var
->constant_value
, ir
);
1759 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1760 steal_memory(var
->constant_initializer
, ir
);
1762 /* The components of aggregate constants are not visited by the normal
1763 * visitor, so steal their values by hand.
1765 if (constant
!= NULL
) {
1766 if (constant
->type
->is_record()) {
1767 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1768 ir_constant
*field
= (ir_constant
*)iter
.get();
1769 steal_memory(field
, ir
);
1771 } else if (constant
->type
->is_array()) {
1772 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1773 steal_memory(constant
->array_elements
[i
], ir
);
1778 ralloc_steal(new_ctx
, ir
);
1783 reparent_ir(exec_list
*list
, void *mem_ctx
)
1785 foreach_list(node
, list
) {
1786 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1792 try_min_one(ir_rvalue
*ir
)
1794 ir_expression
*expr
= ir
->as_expression();
1796 if (!expr
|| expr
->operation
!= ir_binop_min
)
1799 if (expr
->operands
[0]->is_one())
1800 return expr
->operands
[1];
1802 if (expr
->operands
[1]->is_one())
1803 return expr
->operands
[0];
1809 try_max_zero(ir_rvalue
*ir
)
1811 ir_expression
*expr
= ir
->as_expression();
1813 if (!expr
|| expr
->operation
!= ir_binop_max
)
1816 if (expr
->operands
[0]->is_zero())
1817 return expr
->operands
[1];
1819 if (expr
->operands
[1]->is_zero())
1820 return expr
->operands
[0];
1826 ir_rvalue::as_rvalue_to_saturate()
1828 ir_expression
*expr
= this->as_expression();
1833 ir_rvalue
*max_zero
= try_max_zero(expr
);
1835 return try_min_one(max_zero
);
1837 ir_rvalue
*min_one
= try_min_one(expr
);
1839 return try_max_zero(min_one
);
1848 vertices_per_prim(GLenum prim
)
1857 case GL_LINES_ADJACENCY
:
1859 case GL_TRIANGLES_ADJACENCY
:
1862 assert(!"Bad primitive");