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 this->type
= op0
->type
;
259 case ir_unop_bitcast_f2i
:
260 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
261 op0
->type
->vector_elements
, 1);
267 case ir_unop_bitcast_i2f
:
268 case ir_unop_bitcast_u2f
:
269 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
270 op0
->type
->vector_elements
, 1);
275 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
276 op0
->type
->vector_elements
, 1);
281 case ir_unop_bitcast_f2u
:
282 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
283 op0
->type
->vector_elements
, 1);
287 case ir_unop_unpack_half_2x16_split_x
:
288 case ir_unop_unpack_half_2x16_split_y
:
289 this->type
= glsl_type::float_type
;
293 this->type
= glsl_type::bool_type
;
296 case ir_unop_pack_snorm_2x16
:
297 case ir_unop_pack_snorm_4x8
:
298 case ir_unop_pack_unorm_2x16
:
299 case ir_unop_pack_unorm_4x8
:
300 case ir_unop_pack_half_2x16
:
301 this->type
= glsl_type::uint_type
;
304 case ir_unop_unpack_snorm_2x16
:
305 case ir_unop_unpack_unorm_2x16
:
306 case ir_unop_unpack_half_2x16
:
307 this->type
= glsl_type::vec2_type
;
310 case ir_unop_unpack_snorm_4x8
:
311 case ir_unop_unpack_unorm_4x8
:
312 this->type
= glsl_type::vec4_type
;
316 assert(!"not reached: missing automatic type setup for ir_expression");
317 this->type
= op0
->type
;
322 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
324 this->ir_type
= ir_type_expression
;
326 this->operation
= ir_expression_operation(op
);
327 this->operands
[0] = op0
;
328 this->operands
[1] = op1
;
329 this->operands
[2] = NULL
;
330 this->operands
[3] = NULL
;
332 assert(op
> ir_last_unop
);
334 switch (this->operation
) {
335 case ir_binop_all_equal
:
336 case ir_binop_any_nequal
:
337 this->type
= glsl_type::bool_type
;
348 if (op0
->type
->is_scalar()) {
349 this->type
= op1
->type
;
350 } else if (op1
->type
->is_scalar()) {
351 this->type
= op0
->type
;
353 /* FINISHME: matrix types */
354 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
355 assert(op0
->type
== op1
->type
);
356 this->type
= op0
->type
;
360 case ir_binop_logic_and
:
361 case ir_binop_logic_xor
:
362 case ir_binop_logic_or
:
363 case ir_binop_bit_and
:
364 case ir_binop_bit_xor
:
365 case ir_binop_bit_or
:
366 assert(!op0
->type
->is_matrix());
367 assert(!op1
->type
->is_matrix());
368 if (op0
->type
->is_scalar()) {
369 this->type
= op1
->type
;
370 } else if (op1
->type
->is_scalar()) {
371 this->type
= op0
->type
;
373 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
374 this->type
= op0
->type
;
379 case ir_binop_nequal
:
380 case ir_binop_lequal
:
381 case ir_binop_gequal
:
383 case ir_binop_greater
:
384 assert(op0
->type
== op1
->type
);
385 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
386 op0
->type
->vector_elements
, 1);
390 this->type
= glsl_type::float_type
;
393 case ir_binop_pack_half_2x16_split
:
394 this->type
= glsl_type::uint_type
;
397 case ir_binop_lshift
:
398 case ir_binop_rshift
:
399 this->type
= op0
->type
;
402 case ir_binop_vector_extract
:
403 this->type
= op0
->type
->get_scalar_type();
407 assert(!"not reached: missing automatic type setup for ir_expression");
408 this->type
= glsl_type::float_type
;
413 ir_expression::get_num_operands(ir_expression_operation op
)
415 assert(op
<= ir_last_opcode
);
417 if (op
<= ir_last_unop
)
420 if (op
<= ir_last_binop
)
423 if (op
<= ir_last_triop
)
426 if (op
<= ir_last_quadop
)
433 static const char *const operator_strs
[] = {
482 "unpackHalf2x16_split_x",
483 "unpackHalf2x16_split_y",
514 "packHalf2x16_split",
525 const char *ir_expression::operator_string(ir_expression_operation op
)
527 assert((unsigned int) op
< Elements(operator_strs
));
528 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
529 return operator_strs
[op
];
532 const char *ir_expression::operator_string()
534 return operator_string(this->operation
);
538 depth_layout_string(ir_depth_layout layout
)
541 case ir_depth_layout_none
: return "";
542 case ir_depth_layout_any
: return "depth_any";
543 case ir_depth_layout_greater
: return "depth_greater";
544 case ir_depth_layout_less
: return "depth_less";
545 case ir_depth_layout_unchanged
: return "depth_unchanged";
553 ir_expression_operation
554 ir_expression::get_operator(const char *str
)
556 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
557 for (int op
= 0; op
< operator_count
; op
++) {
558 if (strcmp(str
, operator_strs
[op
]) == 0)
559 return (ir_expression_operation
) op
;
561 return (ir_expression_operation
) -1;
564 ir_constant::ir_constant()
566 this->ir_type
= ir_type_constant
;
569 ir_constant::ir_constant(const struct glsl_type
*type
,
570 const ir_constant_data
*data
)
572 assert((type
->base_type
>= GLSL_TYPE_UINT
)
573 && (type
->base_type
<= GLSL_TYPE_BOOL
));
575 this->ir_type
= ir_type_constant
;
577 memcpy(& this->value
, data
, sizeof(this->value
));
580 ir_constant::ir_constant(float f
)
582 this->ir_type
= ir_type_constant
;
583 this->type
= glsl_type::float_type
;
584 this->value
.f
[0] = f
;
585 for (int i
= 1; i
< 16; i
++) {
586 this->value
.f
[i
] = 0;
590 ir_constant::ir_constant(unsigned int u
)
592 this->ir_type
= ir_type_constant
;
593 this->type
= glsl_type::uint_type
;
594 this->value
.u
[0] = u
;
595 for (int i
= 1; i
< 16; i
++) {
596 this->value
.u
[i
] = 0;
600 ir_constant::ir_constant(int i
)
602 this->ir_type
= ir_type_constant
;
603 this->type
= glsl_type::int_type
;
604 this->value
.i
[0] = i
;
605 for (int i
= 1; i
< 16; i
++) {
606 this->value
.i
[i
] = 0;
610 ir_constant::ir_constant(bool b
)
612 this->ir_type
= ir_type_constant
;
613 this->type
= glsl_type::bool_type
;
614 this->value
.b
[0] = b
;
615 for (int i
= 1; i
< 16; i
++) {
616 this->value
.b
[i
] = false;
620 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
622 this->ir_type
= ir_type_constant
;
623 this->type
= c
->type
->get_base_type();
625 switch (this->type
->base_type
) {
626 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
627 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
628 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
629 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
630 default: assert(!"Should not get here."); break;
634 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
636 this->ir_type
= ir_type_constant
;
639 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
640 || type
->is_record() || type
->is_array());
642 if (type
->is_array()) {
643 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
645 foreach_list(node
, value_list
) {
646 ir_constant
*value
= (ir_constant
*) node
;
647 assert(value
->as_constant() != NULL
);
649 this->array_elements
[i
++] = value
;
654 /* If the constant is a record, the types of each of the entries in
655 * value_list must be a 1-for-1 match with the structure components. Each
656 * entry must also be a constant. Just move the nodes from the value_list
657 * to the list in the ir_constant.
659 /* FINISHME: Should there be some type checking and / or assertions here? */
660 /* FINISHME: Should the new constant take ownership of the nodes from
661 * FINISHME: value_list, or should it make copies?
663 if (type
->is_record()) {
664 value_list
->move_nodes_to(& this->components
);
668 for (unsigned i
= 0; i
< 16; i
++) {
669 this->value
.u
[i
] = 0;
672 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
674 /* Constructors with exactly one scalar argument are special for vectors
675 * and matrices. For vectors, the scalar value is replicated to fill all
676 * the components. For matrices, the scalar fills the components of the
677 * diagonal while the rest is filled with 0.
679 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
680 if (type
->is_matrix()) {
681 /* Matrix - fill diagonal (rest is already set to 0) */
682 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
683 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
684 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
686 /* Vector or scalar - fill all components */
687 switch (type
->base_type
) {
690 for (unsigned i
= 0; i
< type
->components(); i
++)
691 this->value
.u
[i
] = value
->value
.u
[0];
693 case GLSL_TYPE_FLOAT
:
694 for (unsigned i
= 0; i
< type
->components(); i
++)
695 this->value
.f
[i
] = value
->value
.f
[0];
698 for (unsigned i
= 0; i
< type
->components(); i
++)
699 this->value
.b
[i
] = value
->value
.b
[0];
702 assert(!"Should not get here.");
709 if (type
->is_matrix() && value
->type
->is_matrix()) {
710 assert(value
->next
->is_tail_sentinel());
712 /* From section 5.4.2 of the GLSL 1.20 spec:
713 * "If a matrix is constructed from a matrix, then each component
714 * (column i, row j) in the result that has a corresponding component
715 * (column i, row j) in the argument will be initialized from there."
717 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
718 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
719 for (unsigned i
= 0; i
< cols
; i
++) {
720 for (unsigned j
= 0; j
< rows
; j
++) {
721 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
722 const unsigned dst
= i
* type
->vector_elements
+ j
;
723 this->value
.f
[dst
] = value
->value
.f
[src
];
727 /* "All other components will be initialized to the identity matrix." */
728 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
729 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
734 /* Use each component from each entry in the value_list to initialize one
735 * component of the constant being constructed.
737 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
738 assert(value
->as_constant() != NULL
);
739 assert(!value
->is_tail_sentinel());
741 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
742 switch (type
->base_type
) {
744 this->value
.u
[i
] = value
->get_uint_component(j
);
747 this->value
.i
[i
] = value
->get_int_component(j
);
749 case GLSL_TYPE_FLOAT
:
750 this->value
.f
[i
] = value
->get_float_component(j
);
753 this->value
.b
[i
] = value
->get_bool_component(j
);
756 /* FINISHME: What to do? Exceptions are not the answer.
762 if (i
>= type
->components())
766 value
= (ir_constant
*) value
->next
;
771 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
773 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
774 || type
->is_record() || type
->is_array());
776 ir_constant
*c
= new(mem_ctx
) ir_constant
;
778 memset(&c
->value
, 0, sizeof(c
->value
));
780 if (type
->is_array()) {
781 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
783 for (unsigned i
= 0; i
< type
->length
; i
++)
784 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
787 if (type
->is_record()) {
788 for (unsigned i
= 0; i
< type
->length
; i
++) {
789 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
790 c
->components
.push_tail(comp
);
798 ir_constant::get_bool_component(unsigned i
) const
800 switch (this->type
->base_type
) {
801 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
802 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
803 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
804 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
805 default: assert(!"Should not get here."); break;
808 /* Must return something to make the compiler happy. This is clearly an
815 ir_constant::get_float_component(unsigned i
) const
817 switch (this->type
->base_type
) {
818 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
819 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
820 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
821 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
822 default: assert(!"Should not get here."); break;
825 /* Must return something to make the compiler happy. This is clearly an
832 ir_constant::get_int_component(unsigned i
) const
834 switch (this->type
->base_type
) {
835 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
836 case GLSL_TYPE_INT
: return this->value
.i
[i
];
837 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
838 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
839 default: assert(!"Should not get here."); break;
842 /* Must return something to make the compiler happy. This is clearly an
849 ir_constant::get_uint_component(unsigned i
) const
851 switch (this->type
->base_type
) {
852 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
853 case GLSL_TYPE_INT
: return this->value
.i
[i
];
854 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
855 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
856 default: assert(!"Should not get here."); break;
859 /* Must return something to make the compiler happy. This is clearly an
866 ir_constant::get_array_element(unsigned i
) const
868 assert(this->type
->is_array());
870 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
872 * "Behavior is undefined if a shader subscripts an array with an index
873 * less than 0 or greater than or equal to the size the array was
876 * Most out-of-bounds accesses are removed before things could get this far.
877 * There are cases where non-constant array index values can get constant
882 else if (i
>= this->type
->length
)
883 i
= this->type
->length
- 1;
885 return array_elements
[i
];
889 ir_constant::get_record_field(const char *name
)
891 int idx
= this->type
->field_index(name
);
896 if (this->components
.is_empty())
899 exec_node
*node
= this->components
.head
;
900 for (int i
= 0; i
< idx
; i
++) {
903 /* If the end of the list is encountered before the element matching the
904 * requested field is found, return NULL.
906 if (node
->is_tail_sentinel())
910 return (ir_constant
*) node
;
914 ir_constant::copy_offset(ir_constant
*src
, int offset
)
916 switch (this->type
->base_type
) {
919 case GLSL_TYPE_FLOAT
:
920 case GLSL_TYPE_BOOL
: {
921 unsigned int size
= src
->type
->components();
922 assert (size
<= this->type
->components() - offset
);
923 for (unsigned int i
=0; i
<size
; i
++) {
924 switch (this->type
->base_type
) {
926 value
.u
[i
+offset
] = src
->get_uint_component(i
);
929 value
.i
[i
+offset
] = src
->get_int_component(i
);
931 case GLSL_TYPE_FLOAT
:
932 value
.f
[i
+offset
] = src
->get_float_component(i
);
935 value
.b
[i
+offset
] = src
->get_bool_component(i
);
937 default: // Shut up the compiler
944 case GLSL_TYPE_STRUCT
: {
945 assert (src
->type
== this->type
);
946 this->components
.make_empty();
947 foreach_list(node
, &src
->components
) {
948 ir_constant
*const orig
= (ir_constant
*) node
;
950 this->components
.push_tail(orig
->clone(this, NULL
));
955 case GLSL_TYPE_ARRAY
: {
956 assert (src
->type
== this->type
);
957 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
958 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
964 assert(!"Should not get here.");
970 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
972 assert (!type
->is_array() && !type
->is_record());
974 if (!type
->is_vector() && !type
->is_matrix()) {
980 for (int i
=0; i
<4; i
++) {
981 if (mask
& (1 << i
)) {
982 switch (this->type
->base_type
) {
984 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
987 value
.i
[i
+offset
] = src
->get_int_component(id
++);
989 case GLSL_TYPE_FLOAT
:
990 value
.f
[i
+offset
] = src
->get_float_component(id
++);
993 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
996 assert(!"Should not get here.");
1004 ir_constant::has_value(const ir_constant
*c
) const
1006 if (this->type
!= c
->type
)
1009 if (this->type
->is_array()) {
1010 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1011 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1017 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1018 const exec_node
*a_node
= this->components
.head
;
1019 const exec_node
*b_node
= c
->components
.head
;
1021 while (!a_node
->is_tail_sentinel()) {
1022 assert(!b_node
->is_tail_sentinel());
1024 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1025 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1027 if (!a_field
->has_value(b_field
))
1030 a_node
= a_node
->next
;
1031 b_node
= b_node
->next
;
1037 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1038 switch (this->type
->base_type
) {
1039 case GLSL_TYPE_UINT
:
1040 if (this->value
.u
[i
] != c
->value
.u
[i
])
1044 if (this->value
.i
[i
] != c
->value
.i
[i
])
1047 case GLSL_TYPE_FLOAT
:
1048 if (this->value
.f
[i
] != c
->value
.f
[i
])
1051 case GLSL_TYPE_BOOL
:
1052 if (this->value
.b
[i
] != c
->value
.b
[i
])
1056 assert(!"Should not get here.");
1065 ir_constant::is_zero() const
1067 if (!this->type
->is_scalar() && !this->type
->is_vector())
1070 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1071 switch (this->type
->base_type
) {
1072 case GLSL_TYPE_FLOAT
:
1073 if (this->value
.f
[c
] != 0.0)
1077 if (this->value
.i
[c
] != 0)
1080 case GLSL_TYPE_UINT
:
1081 if (this->value
.u
[c
] != 0)
1084 case GLSL_TYPE_BOOL
:
1085 if (this->value
.b
[c
] != false)
1089 /* The only other base types are structures, arrays, and samplers.
1090 * Samplers cannot be constants, and the others should have been
1091 * filtered out above.
1093 assert(!"Should not get here.");
1102 ir_constant::is_one() const
1104 if (!this->type
->is_scalar() && !this->type
->is_vector())
1107 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1108 switch (this->type
->base_type
) {
1109 case GLSL_TYPE_FLOAT
:
1110 if (this->value
.f
[c
] != 1.0)
1114 if (this->value
.i
[c
] != 1)
1117 case GLSL_TYPE_UINT
:
1118 if (this->value
.u
[c
] != 1)
1121 case GLSL_TYPE_BOOL
:
1122 if (this->value
.b
[c
] != true)
1126 /* The only other base types are structures, arrays, and samplers.
1127 * Samplers cannot be constants, and the others should have been
1128 * filtered out above.
1130 assert(!"Should not get here.");
1139 ir_constant::is_negative_one() const
1141 if (!this->type
->is_scalar() && !this->type
->is_vector())
1144 if (this->type
->is_boolean())
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 (int(this->value
.u
[c
]) != -1)
1162 /* The only other base types are structures, arrays, samplers, and
1163 * booleans. Samplers cannot be constants, and the others should
1164 * have been filtered out above.
1166 assert(!"Should not get here.");
1175 ir_constant::is_basis() const
1177 if (!this->type
->is_scalar() && !this->type
->is_vector())
1180 if (this->type
->is_boolean())
1184 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1185 switch (this->type
->base_type
) {
1186 case GLSL_TYPE_FLOAT
:
1187 if (this->value
.f
[c
] == 1.0)
1189 else if (this->value
.f
[c
] != 0.0)
1193 if (this->value
.i
[c
] == 1)
1195 else if (this->value
.i
[c
] != 0)
1198 case GLSL_TYPE_UINT
:
1199 if (int(this->value
.u
[c
]) == 1)
1201 else if (int(this->value
.u
[c
]) != 0)
1205 /* The only other base types are structures, arrays, samplers, and
1206 * booleans. Samplers cannot be constants, and the others should
1207 * have been filtered out above.
1209 assert(!"Should not get here.");
1219 this->ir_type
= ir_type_loop
;
1220 this->cmp
= ir_unop_neg
;
1223 this->increment
= NULL
;
1224 this->counter
= NULL
;
1228 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1230 assert(var
!= NULL
);
1232 this->ir_type
= ir_type_dereference_variable
;
1234 this->type
= var
->type
;
1238 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1239 ir_rvalue
*array_index
)
1241 this->ir_type
= ir_type_dereference_array
;
1242 this->array_index
= array_index
;
1243 this->set_array(value
);
1247 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1248 ir_rvalue
*array_index
)
1250 void *ctx
= ralloc_parent(var
);
1252 this->ir_type
= ir_type_dereference_array
;
1253 this->array_index
= array_index
;
1254 this->set_array(new(ctx
) ir_dereference_variable(var
));
1259 ir_dereference_array::set_array(ir_rvalue
*value
)
1261 assert(value
!= NULL
);
1263 this->array
= value
;
1265 const glsl_type
*const vt
= this->array
->type
;
1267 if (vt
->is_array()) {
1268 type
= vt
->element_type();
1269 } else if (vt
->is_matrix()) {
1270 type
= vt
->column_type();
1271 } else if (vt
->is_vector()) {
1272 type
= vt
->get_base_type();
1277 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1280 assert(value
!= NULL
);
1282 this->ir_type
= ir_type_dereference_record
;
1283 this->record
= value
;
1284 this->field
= ralloc_strdup(this, field
);
1285 this->type
= this->record
->type
->field_type(field
);
1289 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1292 void *ctx
= ralloc_parent(var
);
1294 this->ir_type
= ir_type_dereference_record
;
1295 this->record
= new(ctx
) ir_dereference_variable(var
);
1296 this->field
= ralloc_strdup(this, field
);
1297 this->type
= this->record
->type
->field_type(field
);
1301 ir_dereference::is_lvalue() const
1303 ir_variable
*var
= this->variable_referenced();
1305 /* Every l-value derference chain eventually ends in a variable.
1307 if ((var
== NULL
) || var
->read_only
)
1310 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1312 * "Samplers cannot be treated as l-values; hence cannot be used
1313 * as out or inout function parameters, nor can they be
1316 if (this->type
->contains_sampler())
1323 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod" };
1325 const char *ir_texture::opcode_string()
1327 assert((unsigned int) op
<=
1328 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1329 return tex_opcode_strs
[op
];
1333 ir_texture::get_opcode(const char *str
)
1335 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1336 for (int op
= 0; op
< count
; op
++) {
1337 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1338 return (ir_texture_opcode
) op
;
1340 return (ir_texture_opcode
) -1;
1345 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1347 assert(sampler
!= NULL
);
1348 assert(type
!= NULL
);
1349 this->sampler
= sampler
;
1352 if (this->op
== ir_txs
) {
1353 assert(type
->base_type
== GLSL_TYPE_INT
);
1354 } else if (this->op
== ir_lod
) {
1355 assert(type
->vector_elements
== 2);
1356 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1358 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1359 if (sampler
->type
->sampler_shadow
)
1360 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1362 assert(type
->vector_elements
== 4);
1368 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1370 assert((count
>= 1) && (count
<= 4));
1372 memset(&this->mask
, 0, sizeof(this->mask
));
1373 this->mask
.num_components
= count
;
1375 unsigned dup_mask
= 0;
1378 assert(comp
[3] <= 3);
1379 dup_mask
|= (1U << comp
[3])
1380 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1381 this->mask
.w
= comp
[3];
1384 assert(comp
[2] <= 3);
1385 dup_mask
|= (1U << comp
[2])
1386 & ((1U << comp
[0]) | (1U << comp
[1]));
1387 this->mask
.z
= comp
[2];
1390 assert(comp
[1] <= 3);
1391 dup_mask
|= (1U << comp
[1])
1392 & ((1U << comp
[0]));
1393 this->mask
.y
= comp
[1];
1396 assert(comp
[0] <= 3);
1397 this->mask
.x
= comp
[0];
1400 this->mask
.has_duplicates
= dup_mask
!= 0;
1402 /* Based on the number of elements in the swizzle and the base type
1403 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1404 * generate the type of the resulting value.
1406 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1409 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1410 unsigned w
, unsigned count
)
1413 const unsigned components
[4] = { x
, y
, z
, w
};
1414 this->ir_type
= ir_type_swizzle
;
1415 this->init_mask(components
, count
);
1418 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1422 this->ir_type
= ir_type_swizzle
;
1423 this->init_mask(comp
, count
);
1426 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1428 this->ir_type
= ir_type_swizzle
;
1431 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1432 mask
.num_components
, 1);
1441 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1443 void *ctx
= ralloc_parent(val
);
1445 /* For each possible swizzle character, this table encodes the value in
1446 * \c idx_map that represents the 0th element of the vector. For invalid
1447 * swizzle characters (e.g., 'k'), a special value is used that will allow
1448 * detection of errors.
1450 static const unsigned char base_idx
[26] = {
1451 /* a b c d e f g h i j k l m */
1452 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1453 /* n o p q r s t u v w x y z */
1454 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1457 /* Each valid swizzle character has an entry in the previous table. This
1458 * table encodes the base index encoded in the previous table plus the actual
1459 * index of the swizzle character. When processing swizzles, the first
1460 * character in the string is indexed in the previous table. Each character
1461 * in the string is indexed in this table, and the value found there has the
1462 * value form the first table subtracted. The result must be on the range
1465 * For example, the string "wzyx" will get X from the first table. Each of
1466 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1467 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1469 * The string "wzrg" will get X from the first table. Each of the characters
1470 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1471 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1472 * [0,3], the error is detected.
1474 static const unsigned char idx_map
[26] = {
1475 /* a b c d e f g h i j k l m */
1476 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1477 /* n o p q r s t u v w x y z */
1478 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1481 int swiz_idx
[4] = { 0, 0, 0, 0 };
1485 /* Validate the first character in the swizzle string and look up the base
1486 * index value as described above.
1488 if ((str
[0] < 'a') || (str
[0] > 'z'))
1491 const unsigned base
= base_idx
[str
[0] - 'a'];
1494 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1495 /* Validate the next character, and, as described above, convert it to a
1498 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1501 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1502 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1509 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1519 ir_swizzle::variable_referenced() const
1521 return this->val
->variable_referenced();
1525 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1526 ir_variable_mode mode
)
1527 : max_array_access(0), read_only(false), centroid(false), invariant(false),
1528 mode(mode
), interpolation(INTERP_QUALIFIER_NONE
)
1530 this->ir_type
= ir_type_variable
;
1532 this->name
= ralloc_strdup(this, name
);
1533 this->explicit_location
= false;
1534 this->has_initializer
= false;
1535 this->location
= -1;
1536 this->location_frac
= 0;
1537 this->warn_extension
= NULL
;
1538 this->constant_value
= NULL
;
1539 this->constant_initializer
= NULL
;
1540 this->origin_upper_left
= false;
1541 this->pixel_center_integer
= false;
1542 this->depth_layout
= ir_depth_layout_none
;
1545 if (type
&& type
->base_type
== GLSL_TYPE_SAMPLER
)
1546 this->read_only
= true;
1551 ir_variable::interpolation_string() const
1553 switch (this->interpolation
) {
1554 case INTERP_QUALIFIER_NONE
: return "no";
1555 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1556 case INTERP_QUALIFIER_FLAT
: return "flat";
1557 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1560 assert(!"Should not get here.");
1565 glsl_interp_qualifier
1566 ir_variable::determine_interpolation_mode(bool flat_shade
)
1568 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1569 return (glsl_interp_qualifier
) this->interpolation
;
1570 int location
= this->location
;
1572 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1573 if (flat_shade
&& is_gl_Color
)
1574 return INTERP_QUALIFIER_FLAT
;
1576 return INTERP_QUALIFIER_SMOOTH
;
1580 ir_function_signature::ir_function_signature(const glsl_type
*return_type
)
1581 : return_type(return_type
), is_defined(false), _function(NULL
)
1583 this->ir_type
= ir_type_function_signature
;
1584 this->is_builtin
= false;
1585 this->origin
= NULL
;
1590 modes_match(unsigned a
, unsigned b
)
1595 /* Accept "in" vs. "const in" */
1596 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1597 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1605 ir_function_signature::qualifiers_match(exec_list
*params
)
1607 exec_list_iterator iter_a
= parameters
.iterator();
1608 exec_list_iterator iter_b
= params
->iterator();
1610 /* check that the qualifiers match. */
1611 while (iter_a
.has_next()) {
1612 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1613 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1615 if (a
->read_only
!= b
->read_only
||
1616 !modes_match(a
->mode
, b
->mode
) ||
1617 a
->interpolation
!= b
->interpolation
||
1618 a
->centroid
!= b
->centroid
) {
1620 /* parameter a's qualifiers don't match */
1632 ir_function_signature::replace_parameters(exec_list
*new_params
)
1634 /* Destroy all of the previous parameter information. If the previous
1635 * parameter information comes from the function prototype, it may either
1636 * specify incorrect parameter names or not have names at all.
1638 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1639 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1644 new_params
->move_nodes_to(¶meters
);
1648 ir_function::ir_function(const char *name
)
1650 this->ir_type
= ir_type_function
;
1651 this->name
= ralloc_strdup(this, name
);
1656 ir_function::has_user_signature()
1658 foreach_list(n
, &this->signatures
) {
1659 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1660 if (!sig
->is_builtin
)
1668 ir_rvalue::error_value(void *mem_ctx
)
1670 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1672 v
->type
= glsl_type::error_type
;
1678 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1680 foreach_iter(exec_list_iterator
, iter
, *list
) {
1681 ((ir_instruction
*)iter
.get())->accept(visitor
);
1687 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1689 ir_variable
*var
= ir
->as_variable();
1690 ir_constant
*constant
= ir
->as_constant();
1691 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1692 steal_memory(var
->constant_value
, ir
);
1694 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1695 steal_memory(var
->constant_initializer
, ir
);
1697 /* The components of aggregate constants are not visited by the normal
1698 * visitor, so steal their values by hand.
1700 if (constant
!= NULL
) {
1701 if (constant
->type
->is_record()) {
1702 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1703 ir_constant
*field
= (ir_constant
*)iter
.get();
1704 steal_memory(field
, ir
);
1706 } else if (constant
->type
->is_array()) {
1707 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1708 steal_memory(constant
->array_elements
[i
], ir
);
1713 ralloc_steal(new_ctx
, ir
);
1718 reparent_ir(exec_list
*list
, void *mem_ctx
)
1720 foreach_list(node
, list
) {
1721 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1727 try_min_one(ir_rvalue
*ir
)
1729 ir_expression
*expr
= ir
->as_expression();
1731 if (!expr
|| expr
->operation
!= ir_binop_min
)
1734 if (expr
->operands
[0]->is_one())
1735 return expr
->operands
[1];
1737 if (expr
->operands
[1]->is_one())
1738 return expr
->operands
[0];
1744 try_max_zero(ir_rvalue
*ir
)
1746 ir_expression
*expr
= ir
->as_expression();
1748 if (!expr
|| expr
->operation
!= ir_binop_max
)
1751 if (expr
->operands
[0]->is_zero())
1752 return expr
->operands
[1];
1754 if (expr
->operands
[1]->is_zero())
1755 return expr
->operands
[0];
1761 ir_rvalue::as_rvalue_to_saturate()
1763 ir_expression
*expr
= this->as_expression();
1768 ir_rvalue
*max_zero
= try_max_zero(expr
);
1770 return try_min_one(max_zero
);
1772 ir_rvalue
*min_one
= try_min_one(expr
);
1774 return try_max_zero(min_one
);