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
:
405 this->type
= op0
->type
;
408 case ir_binop_vector_extract
:
409 this->type
= op0
->type
->get_scalar_type();
413 assert(!"not reached: missing automatic type setup for ir_expression");
414 this->type
= glsl_type::float_type
;
418 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
421 this->ir_type
= ir_type_expression
;
423 this->operation
= ir_expression_operation(op
);
424 this->operands
[0] = op0
;
425 this->operands
[1] = op1
;
426 this->operands
[2] = op2
;
427 this->operands
[3] = NULL
;
429 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
431 switch (this->operation
) {
434 case ir_triop_bitfield_extract
:
435 case ir_triop_vector_insert
:
436 this->type
= op0
->type
;
441 this->type
= op1
->type
;
445 assert(!"not reached: missing automatic type setup for ir_expression");
446 this->type
= glsl_type::float_type
;
451 ir_expression::get_num_operands(ir_expression_operation op
)
453 assert(op
<= ir_last_opcode
);
455 if (op
<= ir_last_unop
)
458 if (op
<= ir_last_binop
)
461 if (op
<= ir_last_triop
)
464 if (op
<= ir_last_quadop
)
471 static const char *const operator_strs
[] = {
520 "unpackHalf2x16_split_x",
521 "unpackHalf2x16_split_y",
552 "packHalf2x16_split",
567 const char *ir_expression::operator_string(ir_expression_operation op
)
569 assert((unsigned int) op
< Elements(operator_strs
));
570 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
571 return operator_strs
[op
];
574 const char *ir_expression::operator_string()
576 return operator_string(this->operation
);
580 depth_layout_string(ir_depth_layout layout
)
583 case ir_depth_layout_none
: return "";
584 case ir_depth_layout_any
: return "depth_any";
585 case ir_depth_layout_greater
: return "depth_greater";
586 case ir_depth_layout_less
: return "depth_less";
587 case ir_depth_layout_unchanged
: return "depth_unchanged";
595 ir_expression_operation
596 ir_expression::get_operator(const char *str
)
598 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
599 for (int op
= 0; op
< operator_count
; op
++) {
600 if (strcmp(str
, operator_strs
[op
]) == 0)
601 return (ir_expression_operation
) op
;
603 return (ir_expression_operation
) -1;
606 ir_constant::ir_constant()
608 this->ir_type
= ir_type_constant
;
611 ir_constant::ir_constant(const struct glsl_type
*type
,
612 const ir_constant_data
*data
)
614 assert((type
->base_type
>= GLSL_TYPE_UINT
)
615 && (type
->base_type
<= GLSL_TYPE_BOOL
));
617 this->ir_type
= ir_type_constant
;
619 memcpy(& this->value
, data
, sizeof(this->value
));
622 ir_constant::ir_constant(float f
, unsigned vector_elements
)
624 assert(vector_elements
<= 4);
625 this->ir_type
= ir_type_constant
;
626 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, vector_elements
, 1);
627 for (unsigned i
= 0; i
< vector_elements
; i
++) {
628 this->value
.f
[i
] = f
;
630 for (unsigned i
= vector_elements
; i
< 16; i
++) {
631 this->value
.f
[i
] = 0;
635 ir_constant::ir_constant(unsigned int u
, unsigned vector_elements
)
637 assert(vector_elements
<= 4);
638 this->ir_type
= ir_type_constant
;
639 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
, vector_elements
, 1);
640 for (unsigned i
= 0; i
< vector_elements
; i
++) {
641 this->value
.u
[i
] = u
;
643 for (unsigned i
= vector_elements
; i
< 16; i
++) {
644 this->value
.u
[i
] = 0;
648 ir_constant::ir_constant(int integer
, unsigned vector_elements
)
650 assert(vector_elements
<= 4);
651 this->ir_type
= ir_type_constant
;
652 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
, vector_elements
, 1);
653 for (unsigned i
= 0; i
< vector_elements
; i
++) {
654 this->value
.i
[i
] = integer
;
656 for (unsigned i
= vector_elements
; i
< 16; i
++) {
657 this->value
.i
[i
] = 0;
661 ir_constant::ir_constant(bool b
, unsigned vector_elements
)
663 assert(vector_elements
<= 4);
664 this->ir_type
= ir_type_constant
;
665 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
, vector_elements
, 1);
666 for (unsigned i
= 0; i
< vector_elements
; i
++) {
667 this->value
.b
[i
] = b
;
669 for (unsigned i
= vector_elements
; i
< 16; i
++) {
670 this->value
.b
[i
] = false;
674 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
676 this->ir_type
= ir_type_constant
;
677 this->type
= c
->type
->get_base_type();
679 switch (this->type
->base_type
) {
680 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
681 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
682 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
683 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
684 default: assert(!"Should not get here."); break;
688 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
690 this->ir_type
= ir_type_constant
;
693 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
694 || type
->is_record() || type
->is_array());
696 if (type
->is_array()) {
697 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
699 foreach_list(node
, value_list
) {
700 ir_constant
*value
= (ir_constant
*) node
;
701 assert(value
->as_constant() != NULL
);
703 this->array_elements
[i
++] = value
;
708 /* If the constant is a record, the types of each of the entries in
709 * value_list must be a 1-for-1 match with the structure components. Each
710 * entry must also be a constant. Just move the nodes from the value_list
711 * to the list in the ir_constant.
713 /* FINISHME: Should there be some type checking and / or assertions here? */
714 /* FINISHME: Should the new constant take ownership of the nodes from
715 * FINISHME: value_list, or should it make copies?
717 if (type
->is_record()) {
718 value_list
->move_nodes_to(& this->components
);
722 for (unsigned i
= 0; i
< 16; i
++) {
723 this->value
.u
[i
] = 0;
726 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
728 /* Constructors with exactly one scalar argument are special for vectors
729 * and matrices. For vectors, the scalar value is replicated to fill all
730 * the components. For matrices, the scalar fills the components of the
731 * diagonal while the rest is filled with 0.
733 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
734 if (type
->is_matrix()) {
735 /* Matrix - fill diagonal (rest is already set to 0) */
736 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
737 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
738 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
740 /* Vector or scalar - fill all components */
741 switch (type
->base_type
) {
744 for (unsigned i
= 0; i
< type
->components(); i
++)
745 this->value
.u
[i
] = value
->value
.u
[0];
747 case GLSL_TYPE_FLOAT
:
748 for (unsigned i
= 0; i
< type
->components(); i
++)
749 this->value
.f
[i
] = value
->value
.f
[0];
752 for (unsigned i
= 0; i
< type
->components(); i
++)
753 this->value
.b
[i
] = value
->value
.b
[0];
756 assert(!"Should not get here.");
763 if (type
->is_matrix() && value
->type
->is_matrix()) {
764 assert(value
->next
->is_tail_sentinel());
766 /* From section 5.4.2 of the GLSL 1.20 spec:
767 * "If a matrix is constructed from a matrix, then each component
768 * (column i, row j) in the result that has a corresponding component
769 * (column i, row j) in the argument will be initialized from there."
771 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
772 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
773 for (unsigned i
= 0; i
< cols
; i
++) {
774 for (unsigned j
= 0; j
< rows
; j
++) {
775 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
776 const unsigned dst
= i
* type
->vector_elements
+ j
;
777 this->value
.f
[dst
] = value
->value
.f
[src
];
781 /* "All other components will be initialized to the identity matrix." */
782 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
783 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
788 /* Use each component from each entry in the value_list to initialize one
789 * component of the constant being constructed.
791 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
792 assert(value
->as_constant() != NULL
);
793 assert(!value
->is_tail_sentinel());
795 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
796 switch (type
->base_type
) {
798 this->value
.u
[i
] = value
->get_uint_component(j
);
801 this->value
.i
[i
] = value
->get_int_component(j
);
803 case GLSL_TYPE_FLOAT
:
804 this->value
.f
[i
] = value
->get_float_component(j
);
807 this->value
.b
[i
] = value
->get_bool_component(j
);
810 /* FINISHME: What to do? Exceptions are not the answer.
816 if (i
>= type
->components())
820 value
= (ir_constant
*) value
->next
;
825 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
827 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
828 || type
->is_record() || type
->is_array());
830 ir_constant
*c
= new(mem_ctx
) ir_constant
;
832 memset(&c
->value
, 0, sizeof(c
->value
));
834 if (type
->is_array()) {
835 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
837 for (unsigned i
= 0; i
< type
->length
; i
++)
838 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
841 if (type
->is_record()) {
842 for (unsigned i
= 0; i
< type
->length
; i
++) {
843 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
844 c
->components
.push_tail(comp
);
852 ir_constant::get_bool_component(unsigned i
) const
854 switch (this->type
->base_type
) {
855 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
856 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
857 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
858 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
859 default: assert(!"Should not get here."); break;
862 /* Must return something to make the compiler happy. This is clearly an
869 ir_constant::get_float_component(unsigned i
) const
871 switch (this->type
->base_type
) {
872 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
873 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
874 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
875 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
876 default: assert(!"Should not get here."); break;
879 /* Must return something to make the compiler happy. This is clearly an
886 ir_constant::get_int_component(unsigned i
) const
888 switch (this->type
->base_type
) {
889 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
890 case GLSL_TYPE_INT
: return this->value
.i
[i
];
891 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
892 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
893 default: assert(!"Should not get here."); break;
896 /* Must return something to make the compiler happy. This is clearly an
903 ir_constant::get_uint_component(unsigned i
) const
905 switch (this->type
->base_type
) {
906 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
907 case GLSL_TYPE_INT
: return this->value
.i
[i
];
908 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
909 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
910 default: assert(!"Should not get here."); break;
913 /* Must return something to make the compiler happy. This is clearly an
920 ir_constant::get_array_element(unsigned i
) const
922 assert(this->type
->is_array());
924 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
926 * "Behavior is undefined if a shader subscripts an array with an index
927 * less than 0 or greater than or equal to the size the array was
930 * Most out-of-bounds accesses are removed before things could get this far.
931 * There are cases where non-constant array index values can get constant
936 else if (i
>= this->type
->length
)
937 i
= this->type
->length
- 1;
939 return array_elements
[i
];
943 ir_constant::get_record_field(const char *name
)
945 int idx
= this->type
->field_index(name
);
950 if (this->components
.is_empty())
953 exec_node
*node
= this->components
.head
;
954 for (int i
= 0; i
< idx
; i
++) {
957 /* If the end of the list is encountered before the element matching the
958 * requested field is found, return NULL.
960 if (node
->is_tail_sentinel())
964 return (ir_constant
*) node
;
968 ir_constant::copy_offset(ir_constant
*src
, int offset
)
970 switch (this->type
->base_type
) {
973 case GLSL_TYPE_FLOAT
:
974 case GLSL_TYPE_BOOL
: {
975 unsigned int size
= src
->type
->components();
976 assert (size
<= this->type
->components() - offset
);
977 for (unsigned int i
=0; i
<size
; i
++) {
978 switch (this->type
->base_type
) {
980 value
.u
[i
+offset
] = src
->get_uint_component(i
);
983 value
.i
[i
+offset
] = src
->get_int_component(i
);
985 case GLSL_TYPE_FLOAT
:
986 value
.f
[i
+offset
] = src
->get_float_component(i
);
989 value
.b
[i
+offset
] = src
->get_bool_component(i
);
991 default: // Shut up the compiler
998 case GLSL_TYPE_STRUCT
: {
999 assert (src
->type
== this->type
);
1000 this->components
.make_empty();
1001 foreach_list(node
, &src
->components
) {
1002 ir_constant
*const orig
= (ir_constant
*) node
;
1004 this->components
.push_tail(orig
->clone(this, NULL
));
1009 case GLSL_TYPE_ARRAY
: {
1010 assert (src
->type
== this->type
);
1011 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1012 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1018 assert(!"Should not get here.");
1024 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1026 assert (!type
->is_array() && !type
->is_record());
1028 if (!type
->is_vector() && !type
->is_matrix()) {
1034 for (int i
=0; i
<4; i
++) {
1035 if (mask
& (1 << i
)) {
1036 switch (this->type
->base_type
) {
1037 case GLSL_TYPE_UINT
:
1038 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1041 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1043 case GLSL_TYPE_FLOAT
:
1044 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1046 case GLSL_TYPE_BOOL
:
1047 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1050 assert(!"Should not get here.");
1058 ir_constant::has_value(const ir_constant
*c
) const
1060 if (this->type
!= c
->type
)
1063 if (this->type
->is_array()) {
1064 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1065 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1071 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1072 const exec_node
*a_node
= this->components
.head
;
1073 const exec_node
*b_node
= c
->components
.head
;
1075 while (!a_node
->is_tail_sentinel()) {
1076 assert(!b_node
->is_tail_sentinel());
1078 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1079 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1081 if (!a_field
->has_value(b_field
))
1084 a_node
= a_node
->next
;
1085 b_node
= b_node
->next
;
1091 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1092 switch (this->type
->base_type
) {
1093 case GLSL_TYPE_UINT
:
1094 if (this->value
.u
[i
] != c
->value
.u
[i
])
1098 if (this->value
.i
[i
] != c
->value
.i
[i
])
1101 case GLSL_TYPE_FLOAT
:
1102 if (this->value
.f
[i
] != c
->value
.f
[i
])
1105 case GLSL_TYPE_BOOL
:
1106 if (this->value
.b
[i
] != c
->value
.b
[i
])
1110 assert(!"Should not get here.");
1119 ir_constant::is_zero() const
1121 if (!this->type
->is_scalar() && !this->type
->is_vector())
1124 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1125 switch (this->type
->base_type
) {
1126 case GLSL_TYPE_FLOAT
:
1127 if (this->value
.f
[c
] != 0.0)
1131 if (this->value
.i
[c
] != 0)
1134 case GLSL_TYPE_UINT
:
1135 if (this->value
.u
[c
] != 0)
1138 case GLSL_TYPE_BOOL
:
1139 if (this->value
.b
[c
] != false)
1143 /* The only other base types are structures, arrays, and samplers.
1144 * Samplers cannot be constants, and the others should have been
1145 * filtered out above.
1147 assert(!"Should not get here.");
1156 ir_constant::is_one() const
1158 if (!this->type
->is_scalar() && !this->type
->is_vector())
1161 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1162 switch (this->type
->base_type
) {
1163 case GLSL_TYPE_FLOAT
:
1164 if (this->value
.f
[c
] != 1.0)
1168 if (this->value
.i
[c
] != 1)
1171 case GLSL_TYPE_UINT
:
1172 if (this->value
.u
[c
] != 1)
1175 case GLSL_TYPE_BOOL
:
1176 if (this->value
.b
[c
] != true)
1180 /* The only other base types are structures, arrays, and samplers.
1181 * Samplers cannot be constants, and the others should have been
1182 * filtered out above.
1184 assert(!"Should not get here.");
1193 ir_constant::is_negative_one() const
1195 if (!this->type
->is_scalar() && !this->type
->is_vector())
1198 if (this->type
->is_boolean())
1201 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1202 switch (this->type
->base_type
) {
1203 case GLSL_TYPE_FLOAT
:
1204 if (this->value
.f
[c
] != -1.0)
1208 if (this->value
.i
[c
] != -1)
1211 case GLSL_TYPE_UINT
:
1212 if (int(this->value
.u
[c
]) != -1)
1216 /* The only other base types are structures, arrays, samplers, and
1217 * booleans. Samplers cannot be constants, and the others should
1218 * have been filtered out above.
1220 assert(!"Should not get here.");
1229 ir_constant::is_basis() const
1231 if (!this->type
->is_scalar() && !this->type
->is_vector())
1234 if (this->type
->is_boolean())
1238 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1239 switch (this->type
->base_type
) {
1240 case GLSL_TYPE_FLOAT
:
1241 if (this->value
.f
[c
] == 1.0)
1243 else if (this->value
.f
[c
] != 0.0)
1247 if (this->value
.i
[c
] == 1)
1249 else if (this->value
.i
[c
] != 0)
1252 case GLSL_TYPE_UINT
:
1253 if (int(this->value
.u
[c
]) == 1)
1255 else if (int(this->value
.u
[c
]) != 0)
1259 /* The only other base types are structures, arrays, samplers, and
1260 * booleans. Samplers cannot be constants, and the others should
1261 * have been filtered out above.
1263 assert(!"Should not get here.");
1273 this->ir_type
= ir_type_loop
;
1274 this->cmp
= ir_unop_neg
;
1277 this->increment
= NULL
;
1278 this->counter
= NULL
;
1282 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1284 assert(var
!= NULL
);
1286 this->ir_type
= ir_type_dereference_variable
;
1288 this->type
= var
->type
;
1292 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1293 ir_rvalue
*array_index
)
1295 this->ir_type
= ir_type_dereference_array
;
1296 this->array_index
= array_index
;
1297 this->set_array(value
);
1301 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1302 ir_rvalue
*array_index
)
1304 void *ctx
= ralloc_parent(var
);
1306 this->ir_type
= ir_type_dereference_array
;
1307 this->array_index
= array_index
;
1308 this->set_array(new(ctx
) ir_dereference_variable(var
));
1313 ir_dereference_array::set_array(ir_rvalue
*value
)
1315 assert(value
!= NULL
);
1317 this->array
= value
;
1319 const glsl_type
*const vt
= this->array
->type
;
1321 if (vt
->is_array()) {
1322 type
= vt
->element_type();
1323 } else if (vt
->is_matrix()) {
1324 type
= vt
->column_type();
1325 } else if (vt
->is_vector()) {
1326 type
= vt
->get_base_type();
1331 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1334 assert(value
!= NULL
);
1336 this->ir_type
= ir_type_dereference_record
;
1337 this->record
= value
;
1338 this->field
= ralloc_strdup(this, field
);
1339 this->type
= this->record
->type
->field_type(field
);
1343 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1346 void *ctx
= ralloc_parent(var
);
1348 this->ir_type
= ir_type_dereference_record
;
1349 this->record
= new(ctx
) ir_dereference_variable(var
);
1350 this->field
= ralloc_strdup(this, field
);
1351 this->type
= this->record
->type
->field_type(field
);
1355 ir_dereference::is_lvalue() const
1357 ir_variable
*var
= this->variable_referenced();
1359 /* Every l-value derference chain eventually ends in a variable.
1361 if ((var
== NULL
) || var
->read_only
)
1364 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1366 * "Samplers cannot be treated as l-values; hence cannot be used
1367 * as out or inout function parameters, nor can they be
1370 if (this->type
->contains_sampler())
1377 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod" };
1379 const char *ir_texture::opcode_string()
1381 assert((unsigned int) op
<=
1382 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1383 return tex_opcode_strs
[op
];
1387 ir_texture::get_opcode(const char *str
)
1389 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1390 for (int op
= 0; op
< count
; op
++) {
1391 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1392 return (ir_texture_opcode
) op
;
1394 return (ir_texture_opcode
) -1;
1399 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1401 assert(sampler
!= NULL
);
1402 assert(type
!= NULL
);
1403 this->sampler
= sampler
;
1406 if (this->op
== ir_txs
) {
1407 assert(type
->base_type
== GLSL_TYPE_INT
);
1408 } else if (this->op
== ir_lod
) {
1409 assert(type
->vector_elements
== 2);
1410 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1412 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1413 if (sampler
->type
->sampler_shadow
)
1414 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1416 assert(type
->vector_elements
== 4);
1422 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1424 assert((count
>= 1) && (count
<= 4));
1426 memset(&this->mask
, 0, sizeof(this->mask
));
1427 this->mask
.num_components
= count
;
1429 unsigned dup_mask
= 0;
1432 assert(comp
[3] <= 3);
1433 dup_mask
|= (1U << comp
[3])
1434 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1435 this->mask
.w
= comp
[3];
1438 assert(comp
[2] <= 3);
1439 dup_mask
|= (1U << comp
[2])
1440 & ((1U << comp
[0]) | (1U << comp
[1]));
1441 this->mask
.z
= comp
[2];
1444 assert(comp
[1] <= 3);
1445 dup_mask
|= (1U << comp
[1])
1446 & ((1U << comp
[0]));
1447 this->mask
.y
= comp
[1];
1450 assert(comp
[0] <= 3);
1451 this->mask
.x
= comp
[0];
1454 this->mask
.has_duplicates
= dup_mask
!= 0;
1456 /* Based on the number of elements in the swizzle and the base type
1457 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1458 * generate the type of the resulting value.
1460 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1463 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1464 unsigned w
, unsigned count
)
1467 const unsigned components
[4] = { x
, y
, z
, w
};
1468 this->ir_type
= ir_type_swizzle
;
1469 this->init_mask(components
, count
);
1472 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1476 this->ir_type
= ir_type_swizzle
;
1477 this->init_mask(comp
, count
);
1480 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1482 this->ir_type
= ir_type_swizzle
;
1485 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1486 mask
.num_components
, 1);
1495 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1497 void *ctx
= ralloc_parent(val
);
1499 /* For each possible swizzle character, this table encodes the value in
1500 * \c idx_map that represents the 0th element of the vector. For invalid
1501 * swizzle characters (e.g., 'k'), a special value is used that will allow
1502 * detection of errors.
1504 static const unsigned char base_idx
[26] = {
1505 /* a b c d e f g h i j k l m */
1506 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1507 /* n o p q r s t u v w x y z */
1508 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1511 /* Each valid swizzle character has an entry in the previous table. This
1512 * table encodes the base index encoded in the previous table plus the actual
1513 * index of the swizzle character. When processing swizzles, the first
1514 * character in the string is indexed in the previous table. Each character
1515 * in the string is indexed in this table, and the value found there has the
1516 * value form the first table subtracted. The result must be on the range
1519 * For example, the string "wzyx" will get X from the first table. Each of
1520 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1521 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1523 * The string "wzrg" will get X from the first table. Each of the characters
1524 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1525 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1526 * [0,3], the error is detected.
1528 static const unsigned char idx_map
[26] = {
1529 /* a b c d e f g h i j k l m */
1530 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1531 /* n o p q r s t u v w x y z */
1532 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1535 int swiz_idx
[4] = { 0, 0, 0, 0 };
1539 /* Validate the first character in the swizzle string and look up the base
1540 * index value as described above.
1542 if ((str
[0] < 'a') || (str
[0] > 'z'))
1545 const unsigned base
= base_idx
[str
[0] - 'a'];
1548 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1549 /* Validate the next character, and, as described above, convert it to a
1552 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1555 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1556 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1563 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1573 ir_swizzle::variable_referenced() const
1575 return this->val
->variable_referenced();
1579 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1580 ir_variable_mode mode
)
1581 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1582 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1584 this->ir_type
= ir_type_variable
;
1586 this->name
= ralloc_strdup(this, name
);
1587 this->explicit_location
= false;
1588 this->has_initializer
= false;
1589 this->location
= -1;
1590 this->location_frac
= 0;
1591 this->warn_extension
= NULL
;
1592 this->constant_value
= NULL
;
1593 this->constant_initializer
= NULL
;
1594 this->origin_upper_left
= false;
1595 this->pixel_center_integer
= false;
1596 this->depth_layout
= ir_depth_layout_none
;
1599 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1600 this->read_only
= true;
1605 ir_variable::interpolation_string() const
1607 switch (this->interpolation
) {
1608 case INTERP_QUALIFIER_NONE
: return "no";
1609 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1610 case INTERP_QUALIFIER_FLAT
: return "flat";
1611 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1614 assert(!"Should not get here.");
1619 glsl_interp_qualifier
1620 ir_variable::determine_interpolation_mode(bool flat_shade
)
1622 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1623 return (glsl_interp_qualifier
) this->interpolation
;
1624 int location
= this->location
;
1626 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1627 if (flat_shade
&& is_gl_Color
)
1628 return INTERP_QUALIFIER_FLAT
;
1630 return INTERP_QUALIFIER_SMOOTH
;
1634 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1635 builtin_available_predicate b
)
1636 : return_type(return_type
), is_defined(false), builtin_avail(b
),
1639 this->ir_type
= ir_type_function_signature
;
1640 this->origin
= NULL
;
1645 ir_function_signature::is_builtin() const
1647 return builtin_avail
!= NULL
;
1652 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1654 /* We can't call the predicate without a state pointer, so just say that
1655 * the signature is available. At compile time, we need the filtering,
1656 * but also receive a valid state pointer. At link time, we're resolving
1657 * imported built-in prototypes to their definitions, which will always
1658 * be an exact match. So we can skip the filtering.
1663 assert(builtin_avail
!= NULL
);
1664 return builtin_avail(state
);
1669 modes_match(unsigned a
, unsigned b
)
1674 /* Accept "in" vs. "const in" */
1675 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1676 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1684 ir_function_signature::qualifiers_match(exec_list
*params
)
1686 exec_list_iterator iter_a
= parameters
.iterator();
1687 exec_list_iterator iter_b
= params
->iterator();
1689 /* check that the qualifiers match. */
1690 while (iter_a
.has_next()) {
1691 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1692 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1694 if (a
->read_only
!= b
->read_only
||
1695 !modes_match(a
->mode
, b
->mode
) ||
1696 a
->interpolation
!= b
->interpolation
||
1697 a
->centroid
!= b
->centroid
) {
1699 /* parameter a's qualifiers don't match */
1711 ir_function_signature::replace_parameters(exec_list
*new_params
)
1713 /* Destroy all of the previous parameter information. If the previous
1714 * parameter information comes from the function prototype, it may either
1715 * specify incorrect parameter names or not have names at all.
1717 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1718 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1723 new_params
->move_nodes_to(¶meters
);
1727 ir_function::ir_function(const char *name
)
1729 this->ir_type
= ir_type_function
;
1730 this->name
= ralloc_strdup(this, name
);
1735 ir_function::has_user_signature()
1737 foreach_list(n
, &this->signatures
) {
1738 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1739 if (!sig
->is_builtin())
1747 ir_rvalue::error_value(void *mem_ctx
)
1749 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1751 v
->type
= glsl_type::error_type
;
1757 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1759 foreach_iter(exec_list_iterator
, iter
, *list
) {
1760 ((ir_instruction
*)iter
.get())->accept(visitor
);
1766 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1768 ir_variable
*var
= ir
->as_variable();
1769 ir_constant
*constant
= ir
->as_constant();
1770 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1771 steal_memory(var
->constant_value
, ir
);
1773 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1774 steal_memory(var
->constant_initializer
, ir
);
1776 /* The components of aggregate constants are not visited by the normal
1777 * visitor, so steal their values by hand.
1779 if (constant
!= NULL
) {
1780 if (constant
->type
->is_record()) {
1781 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1782 ir_constant
*field
= (ir_constant
*)iter
.get();
1783 steal_memory(field
, ir
);
1785 } else if (constant
->type
->is_array()) {
1786 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1787 steal_memory(constant
->array_elements
[i
], ir
);
1792 ralloc_steal(new_ctx
, ir
);
1797 reparent_ir(exec_list
*list
, void *mem_ctx
)
1799 foreach_list(node
, list
) {
1800 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1806 try_min_one(ir_rvalue
*ir
)
1808 ir_expression
*expr
= ir
->as_expression();
1810 if (!expr
|| expr
->operation
!= ir_binop_min
)
1813 if (expr
->operands
[0]->is_one())
1814 return expr
->operands
[1];
1816 if (expr
->operands
[1]->is_one())
1817 return expr
->operands
[0];
1823 try_max_zero(ir_rvalue
*ir
)
1825 ir_expression
*expr
= ir
->as_expression();
1827 if (!expr
|| expr
->operation
!= ir_binop_max
)
1830 if (expr
->operands
[0]->is_zero())
1831 return expr
->operands
[1];
1833 if (expr
->operands
[1]->is_zero())
1834 return expr
->operands
[0];
1840 ir_rvalue::as_rvalue_to_saturate()
1842 ir_expression
*expr
= this->as_expression();
1847 ir_rvalue
*max_zero
= try_max_zero(expr
);
1849 return try_min_one(max_zero
);
1851 ir_rvalue
*min_one
= try_min_one(expr
);
1853 return try_max_zero(min_one
);
1862 vertices_per_prim(GLenum prim
)
1871 case GL_LINES_ADJACENCY
:
1873 case GL_TRIANGLES_ADJACENCY
:
1876 assert(!"Bad primitive");