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 "glsl_types.h"
28 ir_rvalue::ir_rvalue(enum ir_node_type t
)
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
)
156 : ir_instruction(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
)
176 : ir_instruction(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
)
201 : ir_rvalue(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
)
218 : ir_rvalue(ir_type_expression
)
220 this->operation
= ir_expression_operation(op
);
221 this->operands
[0] = op0
;
222 this->operands
[1] = NULL
;
223 this->operands
[2] = NULL
;
224 this->operands
[3] = NULL
;
226 assert(op
<= ir_last_unop
);
228 switch (this->operation
) {
229 case ir_unop_bit_not
:
230 case ir_unop_logic_not
:
245 case ir_unop_round_even
:
248 case ir_unop_sin_reduced
:
249 case ir_unop_cos_reduced
:
251 case ir_unop_dFdx_coarse
:
252 case ir_unop_dFdx_fine
:
254 case ir_unop_dFdy_coarse
:
255 case ir_unop_dFdy_fine
:
256 case ir_unop_bitfield_reverse
:
257 case ir_unop_interpolate_at_centroid
:
258 this->type
= op0
->type
;
264 case ir_unop_bitcast_f2i
:
265 case ir_unop_bit_count
:
266 case ir_unop_find_msb
:
267 case ir_unop_find_lsb
:
268 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
269 op0
->type
->vector_elements
, 1);
275 case ir_unop_bitcast_i2f
:
276 case ir_unop_bitcast_u2f
:
277 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
278 op0
->type
->vector_elements
, 1);
283 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
284 op0
->type
->vector_elements
, 1);
289 case ir_unop_bitcast_f2u
:
290 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
291 op0
->type
->vector_elements
, 1);
295 case ir_unop_unpack_half_2x16_split_x
:
296 case ir_unop_unpack_half_2x16_split_y
:
297 this->type
= glsl_type::float_type
;
301 this->type
= glsl_type::bool_type
;
304 case ir_unop_pack_snorm_2x16
:
305 case ir_unop_pack_snorm_4x8
:
306 case ir_unop_pack_unorm_2x16
:
307 case ir_unop_pack_unorm_4x8
:
308 case ir_unop_pack_half_2x16
:
309 this->type
= glsl_type::uint_type
;
312 case ir_unop_unpack_snorm_2x16
:
313 case ir_unop_unpack_unorm_2x16
:
314 case ir_unop_unpack_half_2x16
:
315 this->type
= glsl_type::vec2_type
;
318 case ir_unop_unpack_snorm_4x8
:
319 case ir_unop_unpack_unorm_4x8
:
320 this->type
= glsl_type::vec4_type
;
324 assert(!"not reached: missing automatic type setup for ir_expression");
325 this->type
= op0
->type
;
330 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
331 : ir_rvalue(ir_type_expression
)
333 this->operation
= ir_expression_operation(op
);
334 this->operands
[0] = op0
;
335 this->operands
[1] = op1
;
336 this->operands
[2] = NULL
;
337 this->operands
[3] = NULL
;
339 assert(op
> ir_last_unop
);
341 switch (this->operation
) {
342 case ir_binop_all_equal
:
343 case ir_binop_any_nequal
:
344 this->type
= glsl_type::bool_type
;
355 if (op0
->type
->is_scalar()) {
356 this->type
= op1
->type
;
357 } else if (op1
->type
->is_scalar()) {
358 this->type
= op0
->type
;
360 /* FINISHME: matrix types */
361 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
362 assert(op0
->type
== op1
->type
);
363 this->type
= op0
->type
;
367 case ir_binop_logic_and
:
368 case ir_binop_logic_xor
:
369 case ir_binop_logic_or
:
370 case ir_binop_bit_and
:
371 case ir_binop_bit_xor
:
372 case ir_binop_bit_or
:
373 assert(!op0
->type
->is_matrix());
374 assert(!op1
->type
->is_matrix());
375 if (op0
->type
->is_scalar()) {
376 this->type
= op1
->type
;
377 } else if (op1
->type
->is_scalar()) {
378 this->type
= op0
->type
;
380 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
381 this->type
= op0
->type
;
386 case ir_binop_nequal
:
387 case ir_binop_lequal
:
388 case ir_binop_gequal
:
390 case ir_binop_greater
:
391 assert(op0
->type
== op1
->type
);
392 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
393 op0
->type
->vector_elements
, 1);
397 this->type
= glsl_type::float_type
;
400 case ir_binop_pack_half_2x16_split
:
401 this->type
= glsl_type::uint_type
;
404 case ir_binop_imul_high
:
406 case ir_binop_borrow
:
407 case ir_binop_lshift
:
408 case ir_binop_rshift
:
411 case ir_binop_interpolate_at_offset
:
412 case ir_binop_interpolate_at_sample
:
413 this->type
= op0
->type
;
416 case ir_binop_vector_extract
:
417 this->type
= op0
->type
->get_scalar_type();
421 assert(!"not reached: missing automatic type setup for ir_expression");
422 this->type
= glsl_type::float_type
;
426 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
428 : ir_rvalue(ir_type_expression
)
430 this->operation
= ir_expression_operation(op
);
431 this->operands
[0] = op0
;
432 this->operands
[1] = op1
;
433 this->operands
[2] = op2
;
434 this->operands
[3] = NULL
;
436 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
438 switch (this->operation
) {
441 case ir_triop_bitfield_extract
:
442 case ir_triop_vector_insert
:
443 this->type
= op0
->type
;
448 this->type
= op1
->type
;
452 assert(!"not reached: missing automatic type setup for ir_expression");
453 this->type
= glsl_type::float_type
;
458 ir_expression::get_num_operands(ir_expression_operation op
)
460 assert(op
<= ir_last_opcode
);
462 if (op
<= ir_last_unop
)
465 if (op
<= ir_last_binop
)
468 if (op
<= ir_last_triop
)
471 if (op
<= ir_last_quadop
)
478 static const char *const operator_strs
[] = {
531 "unpackHalf2x16_split_x",
532 "unpackHalf2x16_split_y",
538 "interpolate_at_centroid",
567 "packHalf2x16_split",
572 "interpolate_at_offset",
573 "interpolate_at_sample",
584 const char *ir_expression::operator_string(ir_expression_operation op
)
586 assert((unsigned int) op
< Elements(operator_strs
));
587 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
588 return operator_strs
[op
];
591 const char *ir_expression::operator_string()
593 return operator_string(this->operation
);
597 depth_layout_string(ir_depth_layout layout
)
600 case ir_depth_layout_none
: return "";
601 case ir_depth_layout_any
: return "depth_any";
602 case ir_depth_layout_greater
: return "depth_greater";
603 case ir_depth_layout_less
: return "depth_less";
604 case ir_depth_layout_unchanged
: return "depth_unchanged";
612 ir_expression_operation
613 ir_expression::get_operator(const char *str
)
615 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
616 for (int op
= 0; op
< operator_count
; op
++) {
617 if (strcmp(str
, operator_strs
[op
]) == 0)
618 return (ir_expression_operation
) op
;
620 return (ir_expression_operation
) -1;
623 ir_constant::ir_constant()
624 : ir_rvalue(ir_type_constant
)
628 ir_constant::ir_constant(const struct glsl_type
*type
,
629 const ir_constant_data
*data
)
630 : ir_rvalue(ir_type_constant
)
632 assert((type
->base_type
>= GLSL_TYPE_UINT
)
633 && (type
->base_type
<= GLSL_TYPE_BOOL
));
636 memcpy(& this->value
, data
, sizeof(this->value
));
639 ir_constant::ir_constant(float f
, unsigned vector_elements
)
640 : ir_rvalue(ir_type_constant
)
642 assert(vector_elements
<= 4);
643 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, vector_elements
, 1);
644 for (unsigned i
= 0; i
< vector_elements
; i
++) {
645 this->value
.f
[i
] = f
;
647 for (unsigned i
= vector_elements
; i
< 16; i
++) {
648 this->value
.f
[i
] = 0;
652 ir_constant::ir_constant(unsigned int u
, unsigned vector_elements
)
653 : ir_rvalue(ir_type_constant
)
655 assert(vector_elements
<= 4);
656 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
, vector_elements
, 1);
657 for (unsigned i
= 0; i
< vector_elements
; i
++) {
658 this->value
.u
[i
] = u
;
660 for (unsigned i
= vector_elements
; i
< 16; i
++) {
661 this->value
.u
[i
] = 0;
665 ir_constant::ir_constant(int integer
, unsigned vector_elements
)
666 : ir_rvalue(ir_type_constant
)
668 assert(vector_elements
<= 4);
669 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
, vector_elements
, 1);
670 for (unsigned i
= 0; i
< vector_elements
; i
++) {
671 this->value
.i
[i
] = integer
;
673 for (unsigned i
= vector_elements
; i
< 16; i
++) {
674 this->value
.i
[i
] = 0;
678 ir_constant::ir_constant(bool b
, unsigned vector_elements
)
679 : ir_rvalue(ir_type_constant
)
681 assert(vector_elements
<= 4);
682 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
, vector_elements
, 1);
683 for (unsigned i
= 0; i
< vector_elements
; i
++) {
684 this->value
.b
[i
] = b
;
686 for (unsigned i
= vector_elements
; i
< 16; i
++) {
687 this->value
.b
[i
] = false;
691 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
692 : ir_rvalue(ir_type_constant
)
694 this->type
= c
->type
->get_base_type();
696 switch (this->type
->base_type
) {
697 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
698 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
699 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
700 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
701 default: assert(!"Should not get here."); break;
705 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
706 : ir_rvalue(ir_type_constant
)
710 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
711 || type
->is_record() || type
->is_array());
713 if (type
->is_array()) {
714 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
716 foreach_in_list(ir_constant
, value
, value_list
) {
717 assert(value
->as_constant() != NULL
);
719 this->array_elements
[i
++] = value
;
724 /* If the constant is a record, the types of each of the entries in
725 * value_list must be a 1-for-1 match with the structure components. Each
726 * entry must also be a constant. Just move the nodes from the value_list
727 * to the list in the ir_constant.
729 /* FINISHME: Should there be some type checking and / or assertions here? */
730 /* FINISHME: Should the new constant take ownership of the nodes from
731 * FINISHME: value_list, or should it make copies?
733 if (type
->is_record()) {
734 value_list
->move_nodes_to(& this->components
);
738 for (unsigned i
= 0; i
< 16; i
++) {
739 this->value
.u
[i
] = 0;
742 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
744 /* Constructors with exactly one scalar argument are special for vectors
745 * and matrices. For vectors, the scalar value is replicated to fill all
746 * the components. For matrices, the scalar fills the components of the
747 * diagonal while the rest is filled with 0.
749 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
750 if (type
->is_matrix()) {
751 /* Matrix - fill diagonal (rest is already set to 0) */
752 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
753 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
754 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
756 /* Vector or scalar - fill all components */
757 switch (type
->base_type
) {
760 for (unsigned i
= 0; i
< type
->components(); i
++)
761 this->value
.u
[i
] = value
->value
.u
[0];
763 case GLSL_TYPE_FLOAT
:
764 for (unsigned i
= 0; i
< type
->components(); i
++)
765 this->value
.f
[i
] = value
->value
.f
[0];
768 for (unsigned i
= 0; i
< type
->components(); i
++)
769 this->value
.b
[i
] = value
->value
.b
[0];
772 assert(!"Should not get here.");
779 if (type
->is_matrix() && value
->type
->is_matrix()) {
780 assert(value
->next
->is_tail_sentinel());
782 /* From section 5.4.2 of the GLSL 1.20 spec:
783 * "If a matrix is constructed from a matrix, then each component
784 * (column i, row j) in the result that has a corresponding component
785 * (column i, row j) in the argument will be initialized from there."
787 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
788 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
789 for (unsigned i
= 0; i
< cols
; i
++) {
790 for (unsigned j
= 0; j
< rows
; j
++) {
791 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
792 const unsigned dst
= i
* type
->vector_elements
+ j
;
793 this->value
.f
[dst
] = value
->value
.f
[src
];
797 /* "All other components will be initialized to the identity matrix." */
798 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
799 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
804 /* Use each component from each entry in the value_list to initialize one
805 * component of the constant being constructed.
807 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
808 assert(value
->as_constant() != NULL
);
809 assert(!value
->is_tail_sentinel());
811 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
812 switch (type
->base_type
) {
814 this->value
.u
[i
] = value
->get_uint_component(j
);
817 this->value
.i
[i
] = value
->get_int_component(j
);
819 case GLSL_TYPE_FLOAT
:
820 this->value
.f
[i
] = value
->get_float_component(j
);
823 this->value
.b
[i
] = value
->get_bool_component(j
);
826 /* FINISHME: What to do? Exceptions are not the answer.
832 if (i
>= type
->components())
836 value
= (ir_constant
*) value
->next
;
841 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
843 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
844 || type
->is_record() || type
->is_array());
846 ir_constant
*c
= new(mem_ctx
) ir_constant
;
848 memset(&c
->value
, 0, sizeof(c
->value
));
850 if (type
->is_array()) {
851 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
853 for (unsigned i
= 0; i
< type
->length
; i
++)
854 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
857 if (type
->is_record()) {
858 for (unsigned i
= 0; i
< type
->length
; i
++) {
859 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
860 c
->components
.push_tail(comp
);
868 ir_constant::get_bool_component(unsigned i
) const
870 switch (this->type
->base_type
) {
871 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
872 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
873 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
874 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
875 default: assert(!"Should not get here."); break;
878 /* Must return something to make the compiler happy. This is clearly an
885 ir_constant::get_float_component(unsigned i
) const
887 switch (this->type
->base_type
) {
888 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
889 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
890 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
891 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
892 default: assert(!"Should not get here."); break;
895 /* Must return something to make the compiler happy. This is clearly an
902 ir_constant::get_int_component(unsigned i
) const
904 switch (this->type
->base_type
) {
905 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
906 case GLSL_TYPE_INT
: return this->value
.i
[i
];
907 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
908 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
909 default: assert(!"Should not get here."); break;
912 /* Must return something to make the compiler happy. This is clearly an
919 ir_constant::get_uint_component(unsigned i
) const
921 switch (this->type
->base_type
) {
922 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
923 case GLSL_TYPE_INT
: return this->value
.i
[i
];
924 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
925 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
926 default: assert(!"Should not get here."); break;
929 /* Must return something to make the compiler happy. This is clearly an
936 ir_constant::get_array_element(unsigned i
) const
938 assert(this->type
->is_array());
940 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
942 * "Behavior is undefined if a shader subscripts an array with an index
943 * less than 0 or greater than or equal to the size the array was
946 * Most out-of-bounds accesses are removed before things could get this far.
947 * There are cases where non-constant array index values can get constant
952 else if (i
>= this->type
->length
)
953 i
= this->type
->length
- 1;
955 return array_elements
[i
];
959 ir_constant::get_record_field(const char *name
)
961 int idx
= this->type
->field_index(name
);
966 if (this->components
.is_empty())
969 exec_node
*node
= this->components
.head
;
970 for (int i
= 0; i
< idx
; i
++) {
973 /* If the end of the list is encountered before the element matching the
974 * requested field is found, return NULL.
976 if (node
->is_tail_sentinel())
980 return (ir_constant
*) node
;
984 ir_constant::copy_offset(ir_constant
*src
, int offset
)
986 switch (this->type
->base_type
) {
989 case GLSL_TYPE_FLOAT
:
990 case GLSL_TYPE_BOOL
: {
991 unsigned int size
= src
->type
->components();
992 assert (size
<= this->type
->components() - offset
);
993 for (unsigned int i
=0; i
<size
; i
++) {
994 switch (this->type
->base_type
) {
996 value
.u
[i
+offset
] = src
->get_uint_component(i
);
999 value
.i
[i
+offset
] = src
->get_int_component(i
);
1001 case GLSL_TYPE_FLOAT
:
1002 value
.f
[i
+offset
] = src
->get_float_component(i
);
1004 case GLSL_TYPE_BOOL
:
1005 value
.b
[i
+offset
] = src
->get_bool_component(i
);
1007 default: // Shut up the compiler
1014 case GLSL_TYPE_STRUCT
: {
1015 assert (src
->type
== this->type
);
1016 this->components
.make_empty();
1017 foreach_in_list(ir_constant
, orig
, &src
->components
) {
1018 this->components
.push_tail(orig
->clone(this, NULL
));
1023 case GLSL_TYPE_ARRAY
: {
1024 assert (src
->type
== this->type
);
1025 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1026 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1032 assert(!"Should not get here.");
1038 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1040 assert (!type
->is_array() && !type
->is_record());
1042 if (!type
->is_vector() && !type
->is_matrix()) {
1048 for (int i
=0; i
<4; i
++) {
1049 if (mask
& (1 << i
)) {
1050 switch (this->type
->base_type
) {
1051 case GLSL_TYPE_UINT
:
1052 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1055 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1057 case GLSL_TYPE_FLOAT
:
1058 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1060 case GLSL_TYPE_BOOL
:
1061 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1064 assert(!"Should not get here.");
1072 ir_constant::has_value(const ir_constant
*c
) const
1074 if (this->type
!= c
->type
)
1077 if (this->type
->is_array()) {
1078 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1079 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1085 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1086 const exec_node
*a_node
= this->components
.head
;
1087 const exec_node
*b_node
= c
->components
.head
;
1089 while (!a_node
->is_tail_sentinel()) {
1090 assert(!b_node
->is_tail_sentinel());
1092 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1093 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1095 if (!a_field
->has_value(b_field
))
1098 a_node
= a_node
->next
;
1099 b_node
= b_node
->next
;
1105 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1106 switch (this->type
->base_type
) {
1107 case GLSL_TYPE_UINT
:
1108 if (this->value
.u
[i
] != c
->value
.u
[i
])
1112 if (this->value
.i
[i
] != c
->value
.i
[i
])
1115 case GLSL_TYPE_FLOAT
:
1116 if (this->value
.f
[i
] != c
->value
.f
[i
])
1119 case GLSL_TYPE_BOOL
:
1120 if (this->value
.b
[i
] != c
->value
.b
[i
])
1124 assert(!"Should not get here.");
1133 ir_constant::is_value(float f
, int i
) const
1135 if (!this->type
->is_scalar() && !this->type
->is_vector())
1138 /* Only accept boolean values for 0/1. */
1139 if (int(bool(i
)) != i
&& this->type
->is_boolean())
1142 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1143 switch (this->type
->base_type
) {
1144 case GLSL_TYPE_FLOAT
:
1145 if (this->value
.f
[c
] != f
)
1149 if (this->value
.i
[c
] != i
)
1152 case GLSL_TYPE_UINT
:
1153 if (this->value
.u
[c
] != unsigned(i
))
1156 case GLSL_TYPE_BOOL
:
1157 if (this->value
.b
[c
] != bool(i
))
1161 /* The only other base types are structures, arrays, and samplers.
1162 * Samplers cannot be constants, and the others should have been
1163 * filtered out above.
1165 assert(!"Should not get here.");
1174 ir_constant::is_zero() const
1176 return is_value(0.0, 0);
1180 ir_constant::is_one() const
1182 return is_value(1.0, 1);
1186 ir_constant::is_negative_one() const
1188 return is_value(-1.0, -1);
1192 ir_constant::is_basis() const
1194 if (!this->type
->is_scalar() && !this->type
->is_vector())
1197 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)
1206 else if (this->value
.f
[c
] != 0.0)
1210 if (this->value
.i
[c
] == 1)
1212 else if (this->value
.i
[c
] != 0)
1215 case GLSL_TYPE_UINT
:
1216 if (int(this->value
.u
[c
]) == 1)
1218 else if (int(this->value
.u
[c
]) != 0)
1222 /* The only other base types are structures, arrays, samplers, and
1223 * booleans. Samplers cannot be constants, and the others should
1224 * have been filtered out above.
1226 assert(!"Should not get here.");
1235 ir_constant::is_uint16_constant() const
1237 if (!type
->is_integer())
1240 return value
.u
[0] < (1 << 16);
1244 : ir_instruction(ir_type_loop
)
1249 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1250 : ir_dereference(ir_type_dereference_variable
)
1252 assert(var
!= NULL
);
1255 this->type
= var
->type
;
1259 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1260 ir_rvalue
*array_index
)
1261 : ir_dereference(ir_type_dereference_array
)
1263 this->array_index
= array_index
;
1264 this->set_array(value
);
1268 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1269 ir_rvalue
*array_index
)
1270 : ir_dereference(ir_type_dereference_array
)
1272 void *ctx
= ralloc_parent(var
);
1274 this->array_index
= array_index
;
1275 this->set_array(new(ctx
) ir_dereference_variable(var
));
1280 ir_dereference_array::set_array(ir_rvalue
*value
)
1282 assert(value
!= NULL
);
1284 this->array
= value
;
1286 const glsl_type
*const vt
= this->array
->type
;
1288 if (vt
->is_array()) {
1289 type
= vt
->element_type();
1290 } else if (vt
->is_matrix()) {
1291 type
= vt
->column_type();
1292 } else if (vt
->is_vector()) {
1293 type
= vt
->get_base_type();
1298 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1300 : ir_dereference(ir_type_dereference_record
)
1302 assert(value
!= NULL
);
1304 this->record
= value
;
1305 this->field
= ralloc_strdup(this, field
);
1306 this->type
= this->record
->type
->field_type(field
);
1310 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1312 : ir_dereference(ir_type_dereference_record
)
1314 void *ctx
= ralloc_parent(var
);
1316 this->record
= new(ctx
) ir_dereference_variable(var
);
1317 this->field
= ralloc_strdup(this, field
);
1318 this->type
= this->record
->type
->field_type(field
);
1322 ir_dereference::is_lvalue() const
1324 ir_variable
*var
= this->variable_referenced();
1326 /* Every l-value derference chain eventually ends in a variable.
1328 if ((var
== NULL
) || var
->data
.read_only
)
1331 /* From section 4.1.7 of the GLSL 4.40 spec:
1333 * "Opaque variables cannot be treated as l-values; hence cannot
1334 * be used as out or inout function parameters, nor can they be
1337 if (this->type
->contains_opaque())
1344 static const char * const tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod", "tg4", "query_levels" };
1346 const char *ir_texture::opcode_string()
1348 assert((unsigned int) op
<=
1349 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1350 return tex_opcode_strs
[op
];
1354 ir_texture::get_opcode(const char *str
)
1356 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1357 for (int op
= 0; op
< count
; op
++) {
1358 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1359 return (ir_texture_opcode
) op
;
1361 return (ir_texture_opcode
) -1;
1366 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1368 assert(sampler
!= NULL
);
1369 assert(type
!= NULL
);
1370 this->sampler
= sampler
;
1373 if (this->op
== ir_txs
|| this->op
== ir_query_levels
) {
1374 assert(type
->base_type
== GLSL_TYPE_INT
);
1375 } else if (this->op
== ir_lod
) {
1376 assert(type
->vector_elements
== 2);
1377 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1379 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1380 if (sampler
->type
->sampler_shadow
)
1381 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1383 assert(type
->vector_elements
== 4);
1389 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1391 assert((count
>= 1) && (count
<= 4));
1393 memset(&this->mask
, 0, sizeof(this->mask
));
1394 this->mask
.num_components
= count
;
1396 unsigned dup_mask
= 0;
1399 assert(comp
[3] <= 3);
1400 dup_mask
|= (1U << comp
[3])
1401 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1402 this->mask
.w
= comp
[3];
1405 assert(comp
[2] <= 3);
1406 dup_mask
|= (1U << comp
[2])
1407 & ((1U << comp
[0]) | (1U << comp
[1]));
1408 this->mask
.z
= comp
[2];
1411 assert(comp
[1] <= 3);
1412 dup_mask
|= (1U << comp
[1])
1413 & ((1U << comp
[0]));
1414 this->mask
.y
= comp
[1];
1417 assert(comp
[0] <= 3);
1418 this->mask
.x
= comp
[0];
1421 this->mask
.has_duplicates
= dup_mask
!= 0;
1423 /* Based on the number of elements in the swizzle and the base type
1424 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1425 * generate the type of the resulting value.
1427 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1430 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1431 unsigned w
, unsigned count
)
1432 : ir_rvalue(ir_type_swizzle
), val(val
)
1434 const unsigned components
[4] = { x
, y
, z
, w
};
1435 this->init_mask(components
, count
);
1438 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1440 : ir_rvalue(ir_type_swizzle
), val(val
)
1442 this->init_mask(comp
, count
);
1445 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1446 : ir_rvalue(ir_type_swizzle
)
1450 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1451 mask
.num_components
, 1);
1460 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1462 void *ctx
= ralloc_parent(val
);
1464 /* For each possible swizzle character, this table encodes the value in
1465 * \c idx_map that represents the 0th element of the vector. For invalid
1466 * swizzle characters (e.g., 'k'), a special value is used that will allow
1467 * detection of errors.
1469 static const unsigned char base_idx
[26] = {
1470 /* a b c d e f g h i j k l m */
1471 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1472 /* n o p q r s t u v w x y z */
1473 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1476 /* Each valid swizzle character has an entry in the previous table. This
1477 * table encodes the base index encoded in the previous table plus the actual
1478 * index of the swizzle character. When processing swizzles, the first
1479 * character in the string is indexed in the previous table. Each character
1480 * in the string is indexed in this table, and the value found there has the
1481 * value form the first table subtracted. The result must be on the range
1484 * For example, the string "wzyx" will get X from the first table. Each of
1485 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1486 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1488 * The string "wzrg" will get X from the first table. Each of the characters
1489 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1490 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1491 * [0,3], the error is detected.
1493 static const unsigned char idx_map
[26] = {
1494 /* a b c d e f g h i j k l m */
1495 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1496 /* n o p q r s t u v w x y z */
1497 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1500 int swiz_idx
[4] = { 0, 0, 0, 0 };
1504 /* Validate the first character in the swizzle string and look up the base
1505 * index value as described above.
1507 if ((str
[0] < 'a') || (str
[0] > 'z'))
1510 const unsigned base
= base_idx
[str
[0] - 'a'];
1513 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1514 /* Validate the next character, and, as described above, convert it to a
1517 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1520 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1521 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1528 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1538 ir_swizzle::variable_referenced() const
1540 return this->val
->variable_referenced();
1544 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1545 ir_variable_mode mode
)
1546 : ir_instruction(ir_type_variable
), max_ifc_array_access(NULL
)
1549 this->name
= ralloc_strdup(this, name
);
1550 this->data
.explicit_location
= false;
1551 this->data
.has_initializer
= false;
1552 this->data
.location
= -1;
1553 this->data
.location_frac
= 0;
1554 this->warn_extension
= NULL
;
1555 this->constant_value
= NULL
;
1556 this->constant_initializer
= NULL
;
1557 this->data
.origin_upper_left
= false;
1558 this->data
.pixel_center_integer
= false;
1559 this->data
.depth_layout
= ir_depth_layout_none
;
1560 this->data
.used
= false;
1561 this->data
.read_only
= false;
1562 this->data
.centroid
= false;
1563 this->data
.sample
= false;
1564 this->data
.invariant
= false;
1565 this->data
.how_declared
= ir_var_declared_normally
;
1566 this->data
.mode
= mode
;
1567 this->data
.interpolation
= INTERP_QUALIFIER_NONE
;
1568 this->data
.max_array_access
= 0;
1569 this->data
.atomic
.buffer_index
= 0;
1570 this->data
.atomic
.offset
= 0;
1571 this->data
.image
.read_only
= false;
1572 this->data
.image
.write_only
= false;
1573 this->data
.image
.coherent
= false;
1574 this->data
.image
._volatile
= false;
1575 this->data
.image
.restrict_flag
= false;
1578 if (type
->base_type
== GLSL_TYPE_SAMPLER
)
1579 this->data
.read_only
= true;
1581 if (type
->is_interface())
1582 this->init_interface_type(type
);
1583 else if (type
->is_array() && type
->fields
.array
->is_interface())
1584 this->init_interface_type(type
->fields
.array
);
1590 interpolation_string(unsigned interpolation
)
1592 switch (interpolation
) {
1593 case INTERP_QUALIFIER_NONE
: return "no";
1594 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1595 case INTERP_QUALIFIER_FLAT
: return "flat";
1596 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1599 assert(!"Should not get here.");
1604 glsl_interp_qualifier
1605 ir_variable::determine_interpolation_mode(bool flat_shade
)
1607 if (this->data
.interpolation
!= INTERP_QUALIFIER_NONE
)
1608 return (glsl_interp_qualifier
) this->data
.interpolation
;
1609 int location
= this->data
.location
;
1611 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1612 if (flat_shade
&& is_gl_Color
)
1613 return INTERP_QUALIFIER_FLAT
;
1615 return INTERP_QUALIFIER_SMOOTH
;
1619 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1620 builtin_available_predicate b
)
1621 : ir_instruction(ir_type_function_signature
),
1622 return_type(return_type
), is_defined(false), is_intrinsic(false),
1623 builtin_avail(b
), _function(NULL
)
1625 this->origin
= NULL
;
1630 ir_function_signature::is_builtin() const
1632 return builtin_avail
!= NULL
;
1637 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1639 /* We can't call the predicate without a state pointer, so just say that
1640 * the signature is available. At compile time, we need the filtering,
1641 * but also receive a valid state pointer. At link time, we're resolving
1642 * imported built-in prototypes to their definitions, which will always
1643 * be an exact match. So we can skip the filtering.
1648 assert(builtin_avail
!= NULL
);
1649 return builtin_avail(state
);
1654 modes_match(unsigned a
, unsigned b
)
1659 /* Accept "in" vs. "const in" */
1660 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1661 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1669 ir_function_signature::qualifiers_match(exec_list
*params
)
1671 /* check that the qualifiers match. */
1672 foreach_two_lists(a_node
, &this->parameters
, b_node
, params
) {
1673 ir_variable
*a
= (ir_variable
*) a_node
;
1674 ir_variable
*b
= (ir_variable
*) b_node
;
1676 if (a
->data
.read_only
!= b
->data
.read_only
||
1677 !modes_match(a
->data
.mode
, b
->data
.mode
) ||
1678 a
->data
.interpolation
!= b
->data
.interpolation
||
1679 a
->data
.centroid
!= b
->data
.centroid
||
1680 a
->data
.sample
!= b
->data
.sample
||
1681 a
->data
.image
.read_only
!= b
->data
.image
.read_only
||
1682 a
->data
.image
.write_only
!= b
->data
.image
.write_only
||
1683 a
->data
.image
.coherent
!= b
->data
.image
.coherent
||
1684 a
->data
.image
._volatile
!= b
->data
.image
._volatile
||
1685 a
->data
.image
.restrict_flag
!= b
->data
.image
.restrict_flag
) {
1687 /* parameter a's qualifiers don't match */
1696 ir_function_signature::replace_parameters(exec_list
*new_params
)
1698 /* Destroy all of the previous parameter information. If the previous
1699 * parameter information comes from the function prototype, it may either
1700 * specify incorrect parameter names or not have names at all.
1702 new_params
->move_nodes_to(¶meters
);
1706 ir_function::ir_function(const char *name
)
1707 : ir_instruction(ir_type_function
)
1709 this->name
= ralloc_strdup(this, name
);
1714 ir_function::has_user_signature()
1716 foreach_in_list(ir_function_signature
, sig
, &this->signatures
) {
1717 if (!sig
->is_builtin())
1725 ir_rvalue::error_value(void *mem_ctx
)
1727 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue(ir_type_unset
);
1729 v
->type
= glsl_type::error_type
;
1735 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1737 foreach_in_list_safe(ir_instruction
, node
, list
) {
1738 node
->accept(visitor
);
1744 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1746 ir_variable
*var
= ir
->as_variable();
1747 ir_constant
*constant
= ir
->as_constant();
1748 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1749 steal_memory(var
->constant_value
, ir
);
1751 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1752 steal_memory(var
->constant_initializer
, ir
);
1754 /* The components of aggregate constants are not visited by the normal
1755 * visitor, so steal their values by hand.
1757 if (constant
!= NULL
) {
1758 if (constant
->type
->is_record()) {
1759 foreach_in_list(ir_constant
, field
, &constant
->components
) {
1760 steal_memory(field
, ir
);
1762 } else if (constant
->type
->is_array()) {
1763 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1764 steal_memory(constant
->array_elements
[i
], ir
);
1769 ralloc_steal(new_ctx
, ir
);
1774 reparent_ir(exec_list
*list
, void *mem_ctx
)
1776 foreach_in_list(ir_instruction
, node
, list
) {
1777 visit_tree(node
, steal_memory
, mem_ctx
);
1783 try_min_one(ir_rvalue
*ir
)
1785 ir_expression
*expr
= ir
->as_expression();
1787 if (!expr
|| expr
->operation
!= ir_binop_min
)
1790 if (expr
->operands
[0]->is_one())
1791 return expr
->operands
[1];
1793 if (expr
->operands
[1]->is_one())
1794 return expr
->operands
[0];
1800 try_max_zero(ir_rvalue
*ir
)
1802 ir_expression
*expr
= ir
->as_expression();
1804 if (!expr
|| expr
->operation
!= ir_binop_max
)
1807 if (expr
->operands
[0]->is_zero())
1808 return expr
->operands
[1];
1810 if (expr
->operands
[1]->is_zero())
1811 return expr
->operands
[0];
1817 ir_rvalue::as_rvalue_to_saturate()
1819 ir_expression
*expr
= this->as_expression();
1824 ir_rvalue
*max_zero
= try_max_zero(expr
);
1826 return try_min_one(max_zero
);
1828 ir_rvalue
*min_one
= try_min_one(expr
);
1830 return try_max_zero(min_one
);
1839 vertices_per_prim(GLenum prim
)
1848 case GL_LINES_ADJACENCY
:
1850 case GL_TRIANGLES_ADJACENCY
:
1853 assert(!"Bad primitive");
1859 * Generate a string describing the mode of a variable
1862 mode_string(const ir_variable
*var
)
1864 switch (var
->data
.mode
) {
1866 return (var
->data
.read_only
) ? "global constant" : "global variable";
1868 case ir_var_uniform
:
1871 case ir_var_shader_in
:
1872 return "shader input";
1874 case ir_var_shader_out
:
1875 return "shader output";
1877 case ir_var_function_in
:
1878 case ir_var_const_in
:
1879 return "function input";
1881 case ir_var_function_out
:
1882 return "function output";
1884 case ir_var_function_inout
:
1885 return "function inout";
1887 case ir_var_system_value
:
1888 return "shader input";
1890 case ir_var_temporary
:
1891 return "compiler temporary";
1893 case ir_var_mode_count
:
1897 assert(!"Should not get here.");
1898 return "invalid variable";