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 case ir_unop_saturate
:
259 this->type
= op0
->type
;
265 case ir_unop_bitcast_f2i
:
266 case ir_unop_bit_count
:
267 case ir_unop_find_msb
:
268 case ir_unop_find_lsb
:
269 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
270 op0
->type
->vector_elements
, 1);
276 case ir_unop_bitcast_i2f
:
277 case ir_unop_bitcast_u2f
:
278 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
279 op0
->type
->vector_elements
, 1);
284 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
285 op0
->type
->vector_elements
, 1);
290 case ir_unop_bitcast_f2u
:
291 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
292 op0
->type
->vector_elements
, 1);
296 case ir_unop_unpack_half_2x16_split_x
:
297 case ir_unop_unpack_half_2x16_split_y
:
298 this->type
= glsl_type::float_type
;
302 this->type
= glsl_type::bool_type
;
305 case ir_unop_pack_snorm_2x16
:
306 case ir_unop_pack_snorm_4x8
:
307 case ir_unop_pack_unorm_2x16
:
308 case ir_unop_pack_unorm_4x8
:
309 case ir_unop_pack_half_2x16
:
310 this->type
= glsl_type::uint_type
;
313 case ir_unop_unpack_snorm_2x16
:
314 case ir_unop_unpack_unorm_2x16
:
315 case ir_unop_unpack_half_2x16
:
316 this->type
= glsl_type::vec2_type
;
319 case ir_unop_unpack_snorm_4x8
:
320 case ir_unop_unpack_unorm_4x8
:
321 this->type
= glsl_type::vec4_type
;
325 assert(!"not reached: missing automatic type setup for ir_expression");
326 this->type
= op0
->type
;
331 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
332 : ir_rvalue(ir_type_expression
)
334 this->operation
= ir_expression_operation(op
);
335 this->operands
[0] = op0
;
336 this->operands
[1] = op1
;
337 this->operands
[2] = NULL
;
338 this->operands
[3] = NULL
;
340 assert(op
> ir_last_unop
);
342 switch (this->operation
) {
343 case ir_binop_all_equal
:
344 case ir_binop_any_nequal
:
345 this->type
= glsl_type::bool_type
;
356 if (op0
->type
->is_scalar()) {
357 this->type
= op1
->type
;
358 } else if (op1
->type
->is_scalar()) {
359 this->type
= op0
->type
;
361 /* FINISHME: matrix types */
362 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
363 assert(op0
->type
== op1
->type
);
364 this->type
= op0
->type
;
368 case ir_binop_logic_and
:
369 case ir_binop_logic_xor
:
370 case ir_binop_logic_or
:
371 case ir_binop_bit_and
:
372 case ir_binop_bit_xor
:
373 case ir_binop_bit_or
:
374 assert(!op0
->type
->is_matrix());
375 assert(!op1
->type
->is_matrix());
376 if (op0
->type
->is_scalar()) {
377 this->type
= op1
->type
;
378 } else if (op1
->type
->is_scalar()) {
379 this->type
= op0
->type
;
381 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
382 this->type
= op0
->type
;
387 case ir_binop_nequal
:
388 case ir_binop_lequal
:
389 case ir_binop_gequal
:
391 case ir_binop_greater
:
392 assert(op0
->type
== op1
->type
);
393 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
394 op0
->type
->vector_elements
, 1);
398 this->type
= glsl_type::float_type
;
401 case ir_binop_pack_half_2x16_split
:
402 this->type
= glsl_type::uint_type
;
405 case ir_binop_imul_high
:
407 case ir_binop_borrow
:
408 case ir_binop_lshift
:
409 case ir_binop_rshift
:
412 case ir_binop_interpolate_at_offset
:
413 case ir_binop_interpolate_at_sample
:
414 this->type
= op0
->type
;
417 case ir_binop_vector_extract
:
418 this->type
= op0
->type
->get_scalar_type();
422 assert(!"not reached: missing automatic type setup for ir_expression");
423 this->type
= glsl_type::float_type
;
427 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
429 : ir_rvalue(ir_type_expression
)
431 this->operation
= ir_expression_operation(op
);
432 this->operands
[0] = op0
;
433 this->operands
[1] = op1
;
434 this->operands
[2] = op2
;
435 this->operands
[3] = NULL
;
437 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
439 switch (this->operation
) {
442 case ir_triop_bitfield_extract
:
443 case ir_triop_vector_insert
:
444 this->type
= op0
->type
;
449 this->type
= op1
->type
;
453 assert(!"not reached: missing automatic type setup for ir_expression");
454 this->type
= glsl_type::float_type
;
459 ir_expression::get_num_operands(ir_expression_operation op
)
461 assert(op
<= ir_last_opcode
);
463 if (op
<= ir_last_unop
)
466 if (op
<= ir_last_binop
)
469 if (op
<= ir_last_triop
)
472 if (op
<= ir_last_quadop
)
479 static const char *const operator_strs
[] = {
532 "unpackHalf2x16_split_x",
533 "unpackHalf2x16_split_y",
540 "interpolate_at_centroid",
569 "packHalf2x16_split",
574 "interpolate_at_offset",
575 "interpolate_at_sample",
586 const char *ir_expression::operator_string(ir_expression_operation op
)
588 assert((unsigned int) op
< Elements(operator_strs
));
589 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
590 return operator_strs
[op
];
593 const char *ir_expression::operator_string()
595 return operator_string(this->operation
);
599 depth_layout_string(ir_depth_layout layout
)
602 case ir_depth_layout_none
: return "";
603 case ir_depth_layout_any
: return "depth_any";
604 case ir_depth_layout_greater
: return "depth_greater";
605 case ir_depth_layout_less
: return "depth_less";
606 case ir_depth_layout_unchanged
: return "depth_unchanged";
614 ir_expression_operation
615 ir_expression::get_operator(const char *str
)
617 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
618 for (int op
= 0; op
< operator_count
; op
++) {
619 if (strcmp(str
, operator_strs
[op
]) == 0)
620 return (ir_expression_operation
) op
;
622 return (ir_expression_operation
) -1;
625 ir_constant::ir_constant()
626 : ir_rvalue(ir_type_constant
)
630 ir_constant::ir_constant(const struct glsl_type
*type
,
631 const ir_constant_data
*data
)
632 : ir_rvalue(ir_type_constant
)
634 assert((type
->base_type
>= GLSL_TYPE_UINT
)
635 && (type
->base_type
<= GLSL_TYPE_BOOL
));
638 memcpy(& this->value
, data
, sizeof(this->value
));
641 ir_constant::ir_constant(float f
, unsigned vector_elements
)
642 : ir_rvalue(ir_type_constant
)
644 assert(vector_elements
<= 4);
645 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, vector_elements
, 1);
646 for (unsigned i
= 0; i
< vector_elements
; i
++) {
647 this->value
.f
[i
] = f
;
649 for (unsigned i
= vector_elements
; i
< 16; i
++) {
650 this->value
.f
[i
] = 0;
654 ir_constant::ir_constant(unsigned int u
, unsigned vector_elements
)
655 : ir_rvalue(ir_type_constant
)
657 assert(vector_elements
<= 4);
658 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
, vector_elements
, 1);
659 for (unsigned i
= 0; i
< vector_elements
; i
++) {
660 this->value
.u
[i
] = u
;
662 for (unsigned i
= vector_elements
; i
< 16; i
++) {
663 this->value
.u
[i
] = 0;
667 ir_constant::ir_constant(int integer
, unsigned vector_elements
)
668 : ir_rvalue(ir_type_constant
)
670 assert(vector_elements
<= 4);
671 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
, vector_elements
, 1);
672 for (unsigned i
= 0; i
< vector_elements
; i
++) {
673 this->value
.i
[i
] = integer
;
675 for (unsigned i
= vector_elements
; i
< 16; i
++) {
676 this->value
.i
[i
] = 0;
680 ir_constant::ir_constant(bool b
, unsigned vector_elements
)
681 : ir_rvalue(ir_type_constant
)
683 assert(vector_elements
<= 4);
684 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
, vector_elements
, 1);
685 for (unsigned i
= 0; i
< vector_elements
; i
++) {
686 this->value
.b
[i
] = b
;
688 for (unsigned i
= vector_elements
; i
< 16; i
++) {
689 this->value
.b
[i
] = false;
693 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
694 : ir_rvalue(ir_type_constant
)
696 this->type
= c
->type
->get_base_type();
698 switch (this->type
->base_type
) {
699 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
700 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
701 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
702 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
703 default: assert(!"Should not get here."); break;
707 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
708 : ir_rvalue(ir_type_constant
)
712 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
713 || type
->is_record() || type
->is_array());
715 if (type
->is_array()) {
716 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
718 foreach_in_list(ir_constant
, value
, value_list
) {
719 assert(value
->as_constant() != NULL
);
721 this->array_elements
[i
++] = value
;
726 /* If the constant is a record, the types of each of the entries in
727 * value_list must be a 1-for-1 match with the structure components. Each
728 * entry must also be a constant. Just move the nodes from the value_list
729 * to the list in the ir_constant.
731 /* FINISHME: Should there be some type checking and / or assertions here? */
732 /* FINISHME: Should the new constant take ownership of the nodes from
733 * FINISHME: value_list, or should it make copies?
735 if (type
->is_record()) {
736 value_list
->move_nodes_to(& this->components
);
740 for (unsigned i
= 0; i
< 16; i
++) {
741 this->value
.u
[i
] = 0;
744 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
746 /* Constructors with exactly one scalar argument are special for vectors
747 * and matrices. For vectors, the scalar value is replicated to fill all
748 * the components. For matrices, the scalar fills the components of the
749 * diagonal while the rest is filled with 0.
751 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
752 if (type
->is_matrix()) {
753 /* Matrix - fill diagonal (rest is already set to 0) */
754 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
755 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
756 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
758 /* Vector or scalar - fill all components */
759 switch (type
->base_type
) {
762 for (unsigned i
= 0; i
< type
->components(); i
++)
763 this->value
.u
[i
] = value
->value
.u
[0];
765 case GLSL_TYPE_FLOAT
:
766 for (unsigned i
= 0; i
< type
->components(); i
++)
767 this->value
.f
[i
] = value
->value
.f
[0];
770 for (unsigned i
= 0; i
< type
->components(); i
++)
771 this->value
.b
[i
] = value
->value
.b
[0];
774 assert(!"Should not get here.");
781 if (type
->is_matrix() && value
->type
->is_matrix()) {
782 assert(value
->next
->is_tail_sentinel());
784 /* From section 5.4.2 of the GLSL 1.20 spec:
785 * "If a matrix is constructed from a matrix, then each component
786 * (column i, row j) in the result that has a corresponding component
787 * (column i, row j) in the argument will be initialized from there."
789 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
790 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
791 for (unsigned i
= 0; i
< cols
; i
++) {
792 for (unsigned j
= 0; j
< rows
; j
++) {
793 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
794 const unsigned dst
= i
* type
->vector_elements
+ j
;
795 this->value
.f
[dst
] = value
->value
.f
[src
];
799 /* "All other components will be initialized to the identity matrix." */
800 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
801 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
806 /* Use each component from each entry in the value_list to initialize one
807 * component of the constant being constructed.
809 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
810 assert(value
->as_constant() != NULL
);
811 assert(!value
->is_tail_sentinel());
813 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
814 switch (type
->base_type
) {
816 this->value
.u
[i
] = value
->get_uint_component(j
);
819 this->value
.i
[i
] = value
->get_int_component(j
);
821 case GLSL_TYPE_FLOAT
:
822 this->value
.f
[i
] = value
->get_float_component(j
);
825 this->value
.b
[i
] = value
->get_bool_component(j
);
828 /* FINISHME: What to do? Exceptions are not the answer.
834 if (i
>= type
->components())
838 value
= (ir_constant
*) value
->next
;
843 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
845 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
846 || type
->is_record() || type
->is_array());
848 ir_constant
*c
= new(mem_ctx
) ir_constant
;
850 memset(&c
->value
, 0, sizeof(c
->value
));
852 if (type
->is_array()) {
853 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
855 for (unsigned i
= 0; i
< type
->length
; i
++)
856 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
859 if (type
->is_record()) {
860 for (unsigned i
= 0; i
< type
->length
; i
++) {
861 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
862 c
->components
.push_tail(comp
);
870 ir_constant::get_bool_component(unsigned i
) const
872 switch (this->type
->base_type
) {
873 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
874 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
875 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
876 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
877 default: assert(!"Should not get here."); break;
880 /* Must return something to make the compiler happy. This is clearly an
887 ir_constant::get_float_component(unsigned i
) const
889 switch (this->type
->base_type
) {
890 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
891 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
892 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
893 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
894 default: assert(!"Should not get here."); break;
897 /* Must return something to make the compiler happy. This is clearly an
904 ir_constant::get_int_component(unsigned i
) const
906 switch (this->type
->base_type
) {
907 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
908 case GLSL_TYPE_INT
: return this->value
.i
[i
];
909 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
910 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
911 default: assert(!"Should not get here."); break;
914 /* Must return something to make the compiler happy. This is clearly an
921 ir_constant::get_uint_component(unsigned i
) const
923 switch (this->type
->base_type
) {
924 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
925 case GLSL_TYPE_INT
: return this->value
.i
[i
];
926 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
927 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
928 default: assert(!"Should not get here."); break;
931 /* Must return something to make the compiler happy. This is clearly an
938 ir_constant::get_array_element(unsigned i
) const
940 assert(this->type
->is_array());
942 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
944 * "Behavior is undefined if a shader subscripts an array with an index
945 * less than 0 or greater than or equal to the size the array was
948 * Most out-of-bounds accesses are removed before things could get this far.
949 * There are cases where non-constant array index values can get constant
954 else if (i
>= this->type
->length
)
955 i
= this->type
->length
- 1;
957 return array_elements
[i
];
961 ir_constant::get_record_field(const char *name
)
963 int idx
= this->type
->field_index(name
);
968 if (this->components
.is_empty())
971 exec_node
*node
= this->components
.head
;
972 for (int i
= 0; i
< idx
; i
++) {
975 /* If the end of the list is encountered before the element matching the
976 * requested field is found, return NULL.
978 if (node
->is_tail_sentinel())
982 return (ir_constant
*) node
;
986 ir_constant::copy_offset(ir_constant
*src
, int offset
)
988 switch (this->type
->base_type
) {
991 case GLSL_TYPE_FLOAT
:
992 case GLSL_TYPE_BOOL
: {
993 unsigned int size
= src
->type
->components();
994 assert (size
<= this->type
->components() - offset
);
995 for (unsigned int i
=0; i
<size
; i
++) {
996 switch (this->type
->base_type
) {
998 value
.u
[i
+offset
] = src
->get_uint_component(i
);
1001 value
.i
[i
+offset
] = src
->get_int_component(i
);
1003 case GLSL_TYPE_FLOAT
:
1004 value
.f
[i
+offset
] = src
->get_float_component(i
);
1006 case GLSL_TYPE_BOOL
:
1007 value
.b
[i
+offset
] = src
->get_bool_component(i
);
1009 default: // Shut up the compiler
1016 case GLSL_TYPE_STRUCT
: {
1017 assert (src
->type
== this->type
);
1018 this->components
.make_empty();
1019 foreach_in_list(ir_constant
, orig
, &src
->components
) {
1020 this->components
.push_tail(orig
->clone(this, NULL
));
1025 case GLSL_TYPE_ARRAY
: {
1026 assert (src
->type
== this->type
);
1027 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1028 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1034 assert(!"Should not get here.");
1040 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1042 assert (!type
->is_array() && !type
->is_record());
1044 if (!type
->is_vector() && !type
->is_matrix()) {
1050 for (int i
=0; i
<4; i
++) {
1051 if (mask
& (1 << i
)) {
1052 switch (this->type
->base_type
) {
1053 case GLSL_TYPE_UINT
:
1054 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1057 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1059 case GLSL_TYPE_FLOAT
:
1060 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1062 case GLSL_TYPE_BOOL
:
1063 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1066 assert(!"Should not get here.");
1074 ir_constant::has_value(const ir_constant
*c
) const
1076 if (this->type
!= c
->type
)
1079 if (this->type
->is_array()) {
1080 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1081 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1087 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1088 const exec_node
*a_node
= this->components
.head
;
1089 const exec_node
*b_node
= c
->components
.head
;
1091 while (!a_node
->is_tail_sentinel()) {
1092 assert(!b_node
->is_tail_sentinel());
1094 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1095 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1097 if (!a_field
->has_value(b_field
))
1100 a_node
= a_node
->next
;
1101 b_node
= b_node
->next
;
1107 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1108 switch (this->type
->base_type
) {
1109 case GLSL_TYPE_UINT
:
1110 if (this->value
.u
[i
] != c
->value
.u
[i
])
1114 if (this->value
.i
[i
] != c
->value
.i
[i
])
1117 case GLSL_TYPE_FLOAT
:
1118 if (this->value
.f
[i
] != c
->value
.f
[i
])
1121 case GLSL_TYPE_BOOL
:
1122 if (this->value
.b
[i
] != c
->value
.b
[i
])
1126 assert(!"Should not get here.");
1135 ir_constant::is_value(float f
, int i
) const
1137 if (!this->type
->is_scalar() && !this->type
->is_vector())
1140 /* Only accept boolean values for 0/1. */
1141 if (int(bool(i
)) != i
&& this->type
->is_boolean())
1144 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1145 switch (this->type
->base_type
) {
1146 case GLSL_TYPE_FLOAT
:
1147 if (this->value
.f
[c
] != f
)
1151 if (this->value
.i
[c
] != i
)
1154 case GLSL_TYPE_UINT
:
1155 if (this->value
.u
[c
] != unsigned(i
))
1158 case GLSL_TYPE_BOOL
:
1159 if (this->value
.b
[c
] != bool(i
))
1163 /* The only other base types are structures, arrays, and samplers.
1164 * Samplers cannot be constants, and the others should have been
1165 * filtered out above.
1167 assert(!"Should not get here.");
1176 ir_constant::is_zero() const
1178 return is_value(0.0, 0);
1182 ir_constant::is_one() const
1184 return is_value(1.0, 1);
1188 ir_constant::is_negative_one() const
1190 return is_value(-1.0, -1);
1194 ir_constant::is_basis() const
1196 if (!this->type
->is_scalar() && !this->type
->is_vector())
1199 if (this->type
->is_boolean())
1203 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1204 switch (this->type
->base_type
) {
1205 case GLSL_TYPE_FLOAT
:
1206 if (this->value
.f
[c
] == 1.0)
1208 else if (this->value
.f
[c
] != 0.0)
1212 if (this->value
.i
[c
] == 1)
1214 else if (this->value
.i
[c
] != 0)
1217 case GLSL_TYPE_UINT
:
1218 if (int(this->value
.u
[c
]) == 1)
1220 else if (int(this->value
.u
[c
]) != 0)
1224 /* The only other base types are structures, arrays, samplers, and
1225 * booleans. Samplers cannot be constants, and the others should
1226 * have been filtered out above.
1228 assert(!"Should not get here.");
1237 ir_constant::is_uint16_constant() const
1239 if (!type
->is_integer())
1242 return value
.u
[0] < (1 << 16);
1246 : ir_instruction(ir_type_loop
)
1251 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1252 : ir_dereference(ir_type_dereference_variable
)
1254 assert(var
!= NULL
);
1257 this->type
= var
->type
;
1261 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1262 ir_rvalue
*array_index
)
1263 : ir_dereference(ir_type_dereference_array
)
1265 this->array_index
= array_index
;
1266 this->set_array(value
);
1270 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1271 ir_rvalue
*array_index
)
1272 : ir_dereference(ir_type_dereference_array
)
1274 void *ctx
= ralloc_parent(var
);
1276 this->array_index
= array_index
;
1277 this->set_array(new(ctx
) ir_dereference_variable(var
));
1282 ir_dereference_array::set_array(ir_rvalue
*value
)
1284 assert(value
!= NULL
);
1286 this->array
= value
;
1288 const glsl_type
*const vt
= this->array
->type
;
1290 if (vt
->is_array()) {
1291 type
= vt
->element_type();
1292 } else if (vt
->is_matrix()) {
1293 type
= vt
->column_type();
1294 } else if (vt
->is_vector()) {
1295 type
= vt
->get_base_type();
1300 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1302 : ir_dereference(ir_type_dereference_record
)
1304 assert(value
!= NULL
);
1306 this->record
= value
;
1307 this->field
= ralloc_strdup(this, field
);
1308 this->type
= this->record
->type
->field_type(field
);
1312 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1314 : ir_dereference(ir_type_dereference_record
)
1316 void *ctx
= ralloc_parent(var
);
1318 this->record
= new(ctx
) ir_dereference_variable(var
);
1319 this->field
= ralloc_strdup(this, field
);
1320 this->type
= this->record
->type
->field_type(field
);
1324 ir_dereference::is_lvalue() const
1326 ir_variable
*var
= this->variable_referenced();
1328 /* Every l-value derference chain eventually ends in a variable.
1330 if ((var
== NULL
) || var
->data
.read_only
)
1333 /* From section 4.1.7 of the GLSL 4.40 spec:
1335 * "Opaque variables cannot be treated as l-values; hence cannot
1336 * be used as out or inout function parameters, nor can they be
1339 if (this->type
->contains_opaque())
1346 static const char * const tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod", "tg4", "query_levels" };
1348 const char *ir_texture::opcode_string()
1350 assert((unsigned int) op
<=
1351 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1352 return tex_opcode_strs
[op
];
1356 ir_texture::get_opcode(const char *str
)
1358 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1359 for (int op
= 0; op
< count
; op
++) {
1360 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1361 return (ir_texture_opcode
) op
;
1363 return (ir_texture_opcode
) -1;
1368 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1370 assert(sampler
!= NULL
);
1371 assert(type
!= NULL
);
1372 this->sampler
= sampler
;
1375 if (this->op
== ir_txs
|| this->op
== ir_query_levels
) {
1376 assert(type
->base_type
== GLSL_TYPE_INT
);
1377 } else if (this->op
== ir_lod
) {
1378 assert(type
->vector_elements
== 2);
1379 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1381 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1382 if (sampler
->type
->sampler_shadow
)
1383 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1385 assert(type
->vector_elements
== 4);
1391 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1393 assert((count
>= 1) && (count
<= 4));
1395 memset(&this->mask
, 0, sizeof(this->mask
));
1396 this->mask
.num_components
= count
;
1398 unsigned dup_mask
= 0;
1401 assert(comp
[3] <= 3);
1402 dup_mask
|= (1U << comp
[3])
1403 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1404 this->mask
.w
= comp
[3];
1407 assert(comp
[2] <= 3);
1408 dup_mask
|= (1U << comp
[2])
1409 & ((1U << comp
[0]) | (1U << comp
[1]));
1410 this->mask
.z
= comp
[2];
1413 assert(comp
[1] <= 3);
1414 dup_mask
|= (1U << comp
[1])
1415 & ((1U << comp
[0]));
1416 this->mask
.y
= comp
[1];
1419 assert(comp
[0] <= 3);
1420 this->mask
.x
= comp
[0];
1423 this->mask
.has_duplicates
= dup_mask
!= 0;
1425 /* Based on the number of elements in the swizzle and the base type
1426 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1427 * generate the type of the resulting value.
1429 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1432 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1433 unsigned w
, unsigned count
)
1434 : ir_rvalue(ir_type_swizzle
), val(val
)
1436 const unsigned components
[4] = { x
, y
, z
, w
};
1437 this->init_mask(components
, count
);
1440 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1442 : ir_rvalue(ir_type_swizzle
), val(val
)
1444 this->init_mask(comp
, count
);
1447 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1448 : ir_rvalue(ir_type_swizzle
)
1452 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1453 mask
.num_components
, 1);
1462 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1464 void *ctx
= ralloc_parent(val
);
1466 /* For each possible swizzle character, this table encodes the value in
1467 * \c idx_map that represents the 0th element of the vector. For invalid
1468 * swizzle characters (e.g., 'k'), a special value is used that will allow
1469 * detection of errors.
1471 static const unsigned char base_idx
[26] = {
1472 /* a b c d e f g h i j k l m */
1473 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1474 /* n o p q r s t u v w x y z */
1475 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1478 /* Each valid swizzle character has an entry in the previous table. This
1479 * table encodes the base index encoded in the previous table plus the actual
1480 * index of the swizzle character. When processing swizzles, the first
1481 * character in the string is indexed in the previous table. Each character
1482 * in the string is indexed in this table, and the value found there has the
1483 * value form the first table subtracted. The result must be on the range
1486 * For example, the string "wzyx" will get X from the first table. Each of
1487 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1488 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1490 * The string "wzrg" will get X from the first table. Each of the characters
1491 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1492 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1493 * [0,3], the error is detected.
1495 static const unsigned char idx_map
[26] = {
1496 /* a b c d e f g h i j k l m */
1497 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1498 /* n o p q r s t u v w x y z */
1499 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1502 int swiz_idx
[4] = { 0, 0, 0, 0 };
1506 /* Validate the first character in the swizzle string and look up the base
1507 * index value as described above.
1509 if ((str
[0] < 'a') || (str
[0] > 'z'))
1512 const unsigned base
= base_idx
[str
[0] - 'a'];
1515 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1516 /* Validate the next character, and, as described above, convert it to a
1519 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1522 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1523 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1530 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1540 ir_swizzle::variable_referenced() const
1542 return this->val
->variable_referenced();
1546 bool ir_variable::temporaries_allocate_names
= false;
1548 const char ir_variable::tmp_name
[] = "compiler_temp";
1550 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1551 ir_variable_mode mode
)
1552 : ir_instruction(ir_type_variable
)
1556 if (mode
== ir_var_temporary
&& !ir_variable::temporaries_allocate_names
)
1559 /* The ir_variable clone method may call this constructor with name set to
1563 || mode
== ir_var_temporary
1564 || mode
== ir_var_function_in
1565 || mode
== ir_var_function_out
1566 || mode
== ir_var_function_inout
);
1567 assert(name
!= ir_variable::tmp_name
1568 || mode
== ir_var_temporary
);
1569 if (mode
== ir_var_temporary
1570 && (name
== NULL
|| name
== ir_variable::tmp_name
)) {
1571 this->name
= ir_variable::tmp_name
;
1573 this->name
= ralloc_strdup(this, name
);
1576 this->u
.max_ifc_array_access
= NULL
;
1578 this->data
.explicit_location
= false;
1579 this->data
.has_initializer
= false;
1580 this->data
.location
= -1;
1581 this->data
.location_frac
= 0;
1582 this->data
.binding
= 0;
1583 this->data
.warn_extension_index
= 0;
1584 this->constant_value
= NULL
;
1585 this->constant_initializer
= NULL
;
1586 this->data
.origin_upper_left
= false;
1587 this->data
.pixel_center_integer
= false;
1588 this->data
.depth_layout
= ir_depth_layout_none
;
1589 this->data
.used
= false;
1590 this->data
.read_only
= false;
1591 this->data
.centroid
= false;
1592 this->data
.sample
= false;
1593 this->data
.invariant
= false;
1594 this->data
.how_declared
= ir_var_declared_normally
;
1595 this->data
.mode
= mode
;
1596 this->data
.interpolation
= INTERP_QUALIFIER_NONE
;
1597 this->data
.max_array_access
= 0;
1598 this->data
.atomic
.offset
= 0;
1599 this->data
.image_read_only
= false;
1600 this->data
.image_write_only
= false;
1601 this->data
.image_coherent
= false;
1602 this->data
.image_volatile
= false;
1603 this->data
.image_restrict
= false;
1606 if (type
->base_type
== GLSL_TYPE_SAMPLER
)
1607 this->data
.read_only
= true;
1609 if (type
->is_interface())
1610 this->init_interface_type(type
);
1611 else if (type
->is_array() && type
->fields
.array
->is_interface())
1612 this->init_interface_type(type
->fields
.array
);
1618 interpolation_string(unsigned interpolation
)
1620 switch (interpolation
) {
1621 case INTERP_QUALIFIER_NONE
: return "no";
1622 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1623 case INTERP_QUALIFIER_FLAT
: return "flat";
1624 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1627 assert(!"Should not get here.");
1632 glsl_interp_qualifier
1633 ir_variable::determine_interpolation_mode(bool flat_shade
)
1635 if (this->data
.interpolation
!= INTERP_QUALIFIER_NONE
)
1636 return (glsl_interp_qualifier
) this->data
.interpolation
;
1637 int location
= this->data
.location
;
1639 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1640 if (flat_shade
&& is_gl_Color
)
1641 return INTERP_QUALIFIER_FLAT
;
1643 return INTERP_QUALIFIER_SMOOTH
;
1646 const char *const ir_variable::warn_extension_table
[] = {
1648 "GL_ARB_shader_stencil_export",
1649 "GL_AMD_shader_stencil_export",
1653 ir_variable::enable_extension_warning(const char *extension
)
1655 for (unsigned i
= 0; i
< Elements(warn_extension_table
); i
++) {
1656 if (strcmp(warn_extension_table
[i
], extension
) == 0) {
1657 this->data
.warn_extension_index
= i
;
1662 assert(!"Should not get here.");
1663 this->data
.warn_extension_index
= 0;
1667 ir_variable::get_extension_warning() const
1669 return this->data
.warn_extension_index
== 0
1670 ? NULL
: warn_extension_table
[this->data
.warn_extension_index
];
1673 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1674 builtin_available_predicate b
)
1675 : ir_instruction(ir_type_function_signature
),
1676 return_type(return_type
), is_defined(false), is_intrinsic(false),
1677 builtin_avail(b
), _function(NULL
)
1679 this->origin
= NULL
;
1684 ir_function_signature::is_builtin() const
1686 return builtin_avail
!= NULL
;
1691 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1693 /* We can't call the predicate without a state pointer, so just say that
1694 * the signature is available. At compile time, we need the filtering,
1695 * but also receive a valid state pointer. At link time, we're resolving
1696 * imported built-in prototypes to their definitions, which will always
1697 * be an exact match. So we can skip the filtering.
1702 assert(builtin_avail
!= NULL
);
1703 return builtin_avail(state
);
1708 modes_match(unsigned a
, unsigned b
)
1713 /* Accept "in" vs. "const in" */
1714 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1715 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1723 ir_function_signature::qualifiers_match(exec_list
*params
)
1725 /* check that the qualifiers match. */
1726 foreach_two_lists(a_node
, &this->parameters
, b_node
, params
) {
1727 ir_variable
*a
= (ir_variable
*) a_node
;
1728 ir_variable
*b
= (ir_variable
*) b_node
;
1730 if (a
->data
.read_only
!= b
->data
.read_only
||
1731 !modes_match(a
->data
.mode
, b
->data
.mode
) ||
1732 a
->data
.interpolation
!= b
->data
.interpolation
||
1733 a
->data
.centroid
!= b
->data
.centroid
||
1734 a
->data
.sample
!= b
->data
.sample
||
1735 a
->data
.image_read_only
!= b
->data
.image_read_only
||
1736 a
->data
.image_write_only
!= b
->data
.image_write_only
||
1737 a
->data
.image_coherent
!= b
->data
.image_coherent
||
1738 a
->data
.image_volatile
!= b
->data
.image_volatile
||
1739 a
->data
.image_restrict
!= b
->data
.image_restrict
) {
1741 /* parameter a's qualifiers don't match */
1750 ir_function_signature::replace_parameters(exec_list
*new_params
)
1752 /* Destroy all of the previous parameter information. If the previous
1753 * parameter information comes from the function prototype, it may either
1754 * specify incorrect parameter names or not have names at all.
1756 new_params
->move_nodes_to(¶meters
);
1760 ir_function::ir_function(const char *name
)
1761 : ir_instruction(ir_type_function
)
1763 this->name
= ralloc_strdup(this, name
);
1768 ir_function::has_user_signature()
1770 foreach_in_list(ir_function_signature
, sig
, &this->signatures
) {
1771 if (!sig
->is_builtin())
1779 ir_rvalue::error_value(void *mem_ctx
)
1781 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue(ir_type_unset
);
1783 v
->type
= glsl_type::error_type
;
1789 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1791 foreach_in_list_safe(ir_instruction
, node
, list
) {
1792 node
->accept(visitor
);
1798 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1800 ir_variable
*var
= ir
->as_variable();
1801 ir_constant
*constant
= ir
->as_constant();
1802 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1803 steal_memory(var
->constant_value
, ir
);
1805 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1806 steal_memory(var
->constant_initializer
, ir
);
1808 /* The components of aggregate constants are not visited by the normal
1809 * visitor, so steal their values by hand.
1811 if (constant
!= NULL
) {
1812 if (constant
->type
->is_record()) {
1813 foreach_in_list(ir_constant
, field
, &constant
->components
) {
1814 steal_memory(field
, ir
);
1816 } else if (constant
->type
->is_array()) {
1817 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1818 steal_memory(constant
->array_elements
[i
], ir
);
1823 ralloc_steal(new_ctx
, ir
);
1828 reparent_ir(exec_list
*list
, void *mem_ctx
)
1830 foreach_in_list(ir_instruction
, node
, list
) {
1831 visit_tree(node
, steal_memory
, mem_ctx
);
1837 try_min_one(ir_rvalue
*ir
)
1839 ir_expression
*expr
= ir
->as_expression();
1841 if (!expr
|| expr
->operation
!= ir_binop_min
)
1844 if (expr
->operands
[0]->is_one())
1845 return expr
->operands
[1];
1847 if (expr
->operands
[1]->is_one())
1848 return expr
->operands
[0];
1854 try_max_zero(ir_rvalue
*ir
)
1856 ir_expression
*expr
= ir
->as_expression();
1858 if (!expr
|| expr
->operation
!= ir_binop_max
)
1861 if (expr
->operands
[0]->is_zero())
1862 return expr
->operands
[1];
1864 if (expr
->operands
[1]->is_zero())
1865 return expr
->operands
[0];
1871 ir_rvalue::as_rvalue_to_saturate()
1873 ir_expression
*expr
= this->as_expression();
1878 ir_rvalue
*max_zero
= try_max_zero(expr
);
1880 return try_min_one(max_zero
);
1882 ir_rvalue
*min_one
= try_min_one(expr
);
1884 return try_max_zero(min_one
);
1893 vertices_per_prim(GLenum prim
)
1902 case GL_LINES_ADJACENCY
:
1904 case GL_TRIANGLES_ADJACENCY
:
1907 assert(!"Bad primitive");
1913 * Generate a string describing the mode of a variable
1916 mode_string(const ir_variable
*var
)
1918 switch (var
->data
.mode
) {
1920 return (var
->data
.read_only
) ? "global constant" : "global variable";
1922 case ir_var_uniform
:
1925 case ir_var_shader_in
:
1926 return "shader input";
1928 case ir_var_shader_out
:
1929 return "shader output";
1931 case ir_var_function_in
:
1932 case ir_var_const_in
:
1933 return "function input";
1935 case ir_var_function_out
:
1936 return "function output";
1938 case ir_var_function_inout
:
1939 return "function inout";
1941 case ir_var_system_value
:
1942 return "shader input";
1944 case ir_var_temporary
:
1945 return "compiler temporary";
1947 case ir_var_mode_count
:
1951 assert(!"Should not get here.");
1952 return "invalid variable";