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
50 * Modify the swizzle make to move one component to another
52 * \param m IR swizzle to be modified
53 * \param from Component in the RHS that is to be swizzled
54 * \param to Desired swizzle location of \c from
57 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
60 case 0: m
.x
= from
; break;
61 case 1: m
.y
= from
; break;
62 case 2: m
.z
= from
; break;
63 case 3: m
.w
= from
; break;
64 default: assert(!"Should not get here.");
67 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
71 ir_assignment::set_lhs(ir_rvalue
*lhs
)
74 bool swizzled
= false;
77 ir_swizzle
*swiz
= lhs
->as_swizzle();
82 unsigned write_mask
= 0;
83 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
85 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
89 case 0: c
= swiz
->mask
.x
; break;
90 case 1: c
= swiz
->mask
.y
; break;
91 case 2: c
= swiz
->mask
.z
; break;
92 case 3: c
= swiz
->mask
.w
; break;
93 default: assert(!"Should not get here.");
96 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
97 update_rhs_swizzle(rhs_swiz
, i
, c
);
100 this->write_mask
= write_mask
;
103 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
108 /* Now, RHS channels line up with the LHS writemask. Collapse it
109 * to just the channels that will be written.
111 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
113 for (int i
= 0; i
< 4; i
++) {
114 if (write_mask
& (1 << i
))
115 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
117 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
120 assert((lhs
== NULL
) || lhs
->as_dereference());
122 this->lhs
= (ir_dereference
*) lhs
;
126 ir_assignment::whole_variable_written()
128 ir_variable
*v
= this->lhs
->whole_variable_referenced();
133 if (v
->type
->is_scalar())
136 if (v
->type
->is_vector()) {
137 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
139 if (mask
!= this->write_mask
)
143 /* Either all the vector components are assigned or the variable is some
144 * composite type (and the whole thing is assigned.
149 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
150 ir_rvalue
*condition
, unsigned write_mask
)
151 : ir_instruction(ir_type_assignment
)
153 this->condition
= condition
;
156 this->write_mask
= write_mask
;
158 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
159 int lhs_components
= 0;
160 for (int i
= 0; i
< 4; i
++) {
161 if (write_mask
& (1 << i
))
165 assert(lhs_components
== this->rhs
->type
->vector_elements
);
169 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
170 ir_rvalue
*condition
)
171 : ir_instruction(ir_type_assignment
)
173 this->condition
= condition
;
176 /* If the RHS is a vector type, assume that all components of the vector
177 * type are being written to the LHS. The write mask comes from the RHS
178 * because we can have a case where the LHS is a vec4 and the RHS is a
179 * vec3. In that case, the assignment is:
181 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
183 if (rhs
->type
->is_vector())
184 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
185 else if (rhs
->type
->is_scalar())
186 this->write_mask
= 1;
188 this->write_mask
= 0;
193 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
194 ir_rvalue
*op0
, ir_rvalue
*op1
,
195 ir_rvalue
*op2
, ir_rvalue
*op3
)
196 : ir_rvalue(ir_type_expression
)
199 this->operation
= ir_expression_operation(op
);
200 this->operands
[0] = op0
;
201 this->operands
[1] = op1
;
202 this->operands
[2] = op2
;
203 this->operands
[3] = op3
;
205 int num_operands
= get_num_operands(this->operation
);
206 for (int i
= num_operands
; i
< 4; i
++) {
207 assert(this->operands
[i
] == NULL
);
212 ir_expression::ir_expression(int op
, ir_rvalue
*op0
)
213 : ir_rvalue(ir_type_expression
)
215 this->operation
= ir_expression_operation(op
);
216 this->operands
[0] = op0
;
217 this->operands
[1] = NULL
;
218 this->operands
[2] = NULL
;
219 this->operands
[3] = NULL
;
221 assert(op
<= ir_last_unop
);
223 switch (this->operation
) {
224 case ir_unop_bit_not
:
225 case ir_unop_logic_not
:
240 case ir_unop_round_even
:
243 case ir_unop_sin_reduced
:
244 case ir_unop_cos_reduced
:
246 case ir_unop_dFdx_coarse
:
247 case ir_unop_dFdx_fine
:
249 case ir_unop_dFdy_coarse
:
250 case ir_unop_dFdy_fine
:
251 case ir_unop_bitfield_reverse
:
252 case ir_unop_interpolate_at_centroid
:
253 case ir_unop_saturate
:
254 this->type
= op0
->type
;
260 case ir_unop_bitcast_f2i
:
261 case ir_unop_bit_count
:
262 case ir_unop_find_msb
:
263 case ir_unop_find_lsb
:
264 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
265 op0
->type
->vector_elements
, 1);
271 case ir_unop_bitcast_i2f
:
272 case ir_unop_bitcast_u2f
:
273 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
274 op0
->type
->vector_elements
, 1);
279 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
280 op0
->type
->vector_elements
, 1);
285 case ir_unop_bitcast_f2u
:
286 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
287 op0
->type
->vector_elements
, 1);
291 case ir_unop_unpack_half_2x16_split_x
:
292 case ir_unop_unpack_half_2x16_split_y
:
293 this->type
= glsl_type::float_type
;
297 this->type
= glsl_type::bool_type
;
300 case ir_unop_pack_snorm_2x16
:
301 case ir_unop_pack_snorm_4x8
:
302 case ir_unop_pack_unorm_2x16
:
303 case ir_unop_pack_unorm_4x8
:
304 case ir_unop_pack_half_2x16
:
305 this->type
= glsl_type::uint_type
;
308 case ir_unop_unpack_snorm_2x16
:
309 case ir_unop_unpack_unorm_2x16
:
310 case ir_unop_unpack_half_2x16
:
311 this->type
= glsl_type::vec2_type
;
314 case ir_unop_unpack_snorm_4x8
:
315 case ir_unop_unpack_unorm_4x8
:
316 this->type
= glsl_type::vec4_type
;
320 assert(!"not reached: missing automatic type setup for ir_expression");
321 this->type
= op0
->type
;
326 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
327 : ir_rvalue(ir_type_expression
)
329 this->operation
= ir_expression_operation(op
);
330 this->operands
[0] = op0
;
331 this->operands
[1] = op1
;
332 this->operands
[2] = NULL
;
333 this->operands
[3] = NULL
;
335 assert(op
> ir_last_unop
);
337 switch (this->operation
) {
338 case ir_binop_all_equal
:
339 case ir_binop_any_nequal
:
340 this->type
= glsl_type::bool_type
;
351 if (op0
->type
->is_scalar()) {
352 this->type
= op1
->type
;
353 } else if (op1
->type
->is_scalar()) {
354 this->type
= op0
->type
;
356 /* FINISHME: matrix types */
357 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
358 assert(op0
->type
== op1
->type
);
359 this->type
= op0
->type
;
363 case ir_binop_logic_and
:
364 case ir_binop_logic_xor
:
365 case ir_binop_logic_or
:
366 case ir_binop_bit_and
:
367 case ir_binop_bit_xor
:
368 case ir_binop_bit_or
:
369 assert(!op0
->type
->is_matrix());
370 assert(!op1
->type
->is_matrix());
371 if (op0
->type
->is_scalar()) {
372 this->type
= op1
->type
;
373 } else if (op1
->type
->is_scalar()) {
374 this->type
= op0
->type
;
376 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
377 this->type
= op0
->type
;
382 case ir_binop_nequal
:
383 case ir_binop_lequal
:
384 case ir_binop_gequal
:
386 case ir_binop_greater
:
387 assert(op0
->type
== op1
->type
);
388 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
389 op0
->type
->vector_elements
, 1);
393 this->type
= glsl_type::float_type
;
396 case ir_binop_pack_half_2x16_split
:
397 this->type
= glsl_type::uint_type
;
400 case ir_binop_imul_high
:
402 case ir_binop_borrow
:
403 case ir_binop_lshift
:
404 case ir_binop_rshift
:
407 case ir_binop_interpolate_at_offset
:
408 case ir_binop_interpolate_at_sample
:
409 this->type
= op0
->type
;
412 case ir_binop_vector_extract
:
413 this->type
= op0
->type
->get_scalar_type();
417 assert(!"not reached: missing automatic type setup for ir_expression");
418 this->type
= glsl_type::float_type
;
422 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
424 : ir_rvalue(ir_type_expression
)
426 this->operation
= ir_expression_operation(op
);
427 this->operands
[0] = op0
;
428 this->operands
[1] = op1
;
429 this->operands
[2] = op2
;
430 this->operands
[3] = NULL
;
432 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
434 switch (this->operation
) {
437 case ir_triop_bitfield_extract
:
438 case ir_triop_vector_insert
:
439 this->type
= op0
->type
;
444 this->type
= op1
->type
;
448 assert(!"not reached: missing automatic type setup for ir_expression");
449 this->type
= glsl_type::float_type
;
454 ir_expression::get_num_operands(ir_expression_operation op
)
456 assert(op
<= ir_last_opcode
);
458 if (op
<= ir_last_unop
)
461 if (op
<= ir_last_binop
)
464 if (op
<= ir_last_triop
)
467 if (op
<= ir_last_quadop
)
474 static const char *const operator_strs
[] = {
527 "unpackHalf2x16_split_x",
528 "unpackHalf2x16_split_y",
535 "interpolate_at_centroid",
564 "packHalf2x16_split",
569 "interpolate_at_offset",
570 "interpolate_at_sample",
581 const char *ir_expression::operator_string(ir_expression_operation op
)
583 assert((unsigned int) op
< Elements(operator_strs
));
584 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
585 return operator_strs
[op
];
588 const char *ir_expression::operator_string()
590 return operator_string(this->operation
);
594 depth_layout_string(ir_depth_layout layout
)
597 case ir_depth_layout_none
: return "";
598 case ir_depth_layout_any
: return "depth_any";
599 case ir_depth_layout_greater
: return "depth_greater";
600 case ir_depth_layout_less
: return "depth_less";
601 case ir_depth_layout_unchanged
: return "depth_unchanged";
609 ir_expression_operation
610 ir_expression::get_operator(const char *str
)
612 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
613 for (int op
= 0; op
< operator_count
; op
++) {
614 if (strcmp(str
, operator_strs
[op
]) == 0)
615 return (ir_expression_operation
) op
;
617 return (ir_expression_operation
) -1;
620 ir_constant::ir_constant()
621 : ir_rvalue(ir_type_constant
)
625 ir_constant::ir_constant(const struct glsl_type
*type
,
626 const ir_constant_data
*data
)
627 : ir_rvalue(ir_type_constant
)
629 assert((type
->base_type
>= GLSL_TYPE_UINT
)
630 && (type
->base_type
<= GLSL_TYPE_BOOL
));
633 memcpy(& this->value
, data
, sizeof(this->value
));
636 ir_constant::ir_constant(float f
, unsigned vector_elements
)
637 : ir_rvalue(ir_type_constant
)
639 assert(vector_elements
<= 4);
640 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, vector_elements
, 1);
641 for (unsigned i
= 0; i
< vector_elements
; i
++) {
642 this->value
.f
[i
] = f
;
644 for (unsigned i
= vector_elements
; i
< 16; i
++) {
645 this->value
.f
[i
] = 0;
649 ir_constant::ir_constant(unsigned int u
, unsigned vector_elements
)
650 : ir_rvalue(ir_type_constant
)
652 assert(vector_elements
<= 4);
653 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
, vector_elements
, 1);
654 for (unsigned i
= 0; i
< vector_elements
; i
++) {
655 this->value
.u
[i
] = u
;
657 for (unsigned i
= vector_elements
; i
< 16; i
++) {
658 this->value
.u
[i
] = 0;
662 ir_constant::ir_constant(int integer
, unsigned vector_elements
)
663 : ir_rvalue(ir_type_constant
)
665 assert(vector_elements
<= 4);
666 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
, vector_elements
, 1);
667 for (unsigned i
= 0; i
< vector_elements
; i
++) {
668 this->value
.i
[i
] = integer
;
670 for (unsigned i
= vector_elements
; i
< 16; i
++) {
671 this->value
.i
[i
] = 0;
675 ir_constant::ir_constant(bool b
, unsigned vector_elements
)
676 : ir_rvalue(ir_type_constant
)
678 assert(vector_elements
<= 4);
679 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
, vector_elements
, 1);
680 for (unsigned i
= 0; i
< vector_elements
; i
++) {
681 this->value
.b
[i
] = b
;
683 for (unsigned i
= vector_elements
; i
< 16; i
++) {
684 this->value
.b
[i
] = false;
688 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
689 : ir_rvalue(ir_type_constant
)
691 this->type
= c
->type
->get_base_type();
693 switch (this->type
->base_type
) {
694 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
695 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
696 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
697 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
698 default: assert(!"Should not get here."); break;
702 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
703 : ir_rvalue(ir_type_constant
)
707 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
708 || type
->is_record() || type
->is_array());
710 if (type
->is_array()) {
711 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
713 foreach_in_list(ir_constant
, value
, value_list
) {
714 assert(value
->as_constant() != NULL
);
716 this->array_elements
[i
++] = value
;
721 /* If the constant is a record, the types of each of the entries in
722 * value_list must be a 1-for-1 match with the structure components. Each
723 * entry must also be a constant. Just move the nodes from the value_list
724 * to the list in the ir_constant.
726 /* FINISHME: Should there be some type checking and / or assertions here? */
727 /* FINISHME: Should the new constant take ownership of the nodes from
728 * FINISHME: value_list, or should it make copies?
730 if (type
->is_record()) {
731 value_list
->move_nodes_to(& this->components
);
735 for (unsigned i
= 0; i
< 16; i
++) {
736 this->value
.u
[i
] = 0;
739 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
741 /* Constructors with exactly one scalar argument are special for vectors
742 * and matrices. For vectors, the scalar value is replicated to fill all
743 * the components. For matrices, the scalar fills the components of the
744 * diagonal while the rest is filled with 0.
746 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
747 if (type
->is_matrix()) {
748 /* Matrix - fill diagonal (rest is already set to 0) */
749 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
750 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
751 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
753 /* Vector or scalar - fill all components */
754 switch (type
->base_type
) {
757 for (unsigned i
= 0; i
< type
->components(); i
++)
758 this->value
.u
[i
] = value
->value
.u
[0];
760 case GLSL_TYPE_FLOAT
:
761 for (unsigned i
= 0; i
< type
->components(); i
++)
762 this->value
.f
[i
] = value
->value
.f
[0];
765 for (unsigned i
= 0; i
< type
->components(); i
++)
766 this->value
.b
[i
] = value
->value
.b
[0];
769 assert(!"Should not get here.");
776 if (type
->is_matrix() && value
->type
->is_matrix()) {
777 assert(value
->next
->is_tail_sentinel());
779 /* From section 5.4.2 of the GLSL 1.20 spec:
780 * "If a matrix is constructed from a matrix, then each component
781 * (column i, row j) in the result that has a corresponding component
782 * (column i, row j) in the argument will be initialized from there."
784 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
785 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
786 for (unsigned i
= 0; i
< cols
; i
++) {
787 for (unsigned j
= 0; j
< rows
; j
++) {
788 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
789 const unsigned dst
= i
* type
->vector_elements
+ j
;
790 this->value
.f
[dst
] = value
->value
.f
[src
];
794 /* "All other components will be initialized to the identity matrix." */
795 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
796 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
801 /* Use each component from each entry in the value_list to initialize one
802 * component of the constant being constructed.
804 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
805 assert(value
->as_constant() != NULL
);
806 assert(!value
->is_tail_sentinel());
808 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
809 switch (type
->base_type
) {
811 this->value
.u
[i
] = value
->get_uint_component(j
);
814 this->value
.i
[i
] = value
->get_int_component(j
);
816 case GLSL_TYPE_FLOAT
:
817 this->value
.f
[i
] = value
->get_float_component(j
);
820 this->value
.b
[i
] = value
->get_bool_component(j
);
823 /* FINISHME: What to do? Exceptions are not the answer.
829 if (i
>= type
->components())
833 value
= (ir_constant
*) value
->next
;
838 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
840 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
841 || type
->is_record() || type
->is_array());
843 ir_constant
*c
= new(mem_ctx
) ir_constant
;
845 memset(&c
->value
, 0, sizeof(c
->value
));
847 if (type
->is_array()) {
848 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
850 for (unsigned i
= 0; i
< type
->length
; i
++)
851 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
854 if (type
->is_record()) {
855 for (unsigned i
= 0; i
< type
->length
; i
++) {
856 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
857 c
->components
.push_tail(comp
);
865 ir_constant::get_bool_component(unsigned i
) const
867 switch (this->type
->base_type
) {
868 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
869 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
870 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
871 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
872 default: assert(!"Should not get here."); break;
875 /* Must return something to make the compiler happy. This is clearly an
882 ir_constant::get_float_component(unsigned i
) const
884 switch (this->type
->base_type
) {
885 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
886 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
887 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
888 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
889 default: assert(!"Should not get here."); break;
892 /* Must return something to make the compiler happy. This is clearly an
899 ir_constant::get_int_component(unsigned i
) const
901 switch (this->type
->base_type
) {
902 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
903 case GLSL_TYPE_INT
: return this->value
.i
[i
];
904 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
905 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
906 default: assert(!"Should not get here."); break;
909 /* Must return something to make the compiler happy. This is clearly an
916 ir_constant::get_uint_component(unsigned i
) const
918 switch (this->type
->base_type
) {
919 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
920 case GLSL_TYPE_INT
: return this->value
.i
[i
];
921 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
922 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
923 default: assert(!"Should not get here."); break;
926 /* Must return something to make the compiler happy. This is clearly an
933 ir_constant::get_array_element(unsigned i
) const
935 assert(this->type
->is_array());
937 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
939 * "Behavior is undefined if a shader subscripts an array with an index
940 * less than 0 or greater than or equal to the size the array was
943 * Most out-of-bounds accesses are removed before things could get this far.
944 * There are cases where non-constant array index values can get constant
949 else if (i
>= this->type
->length
)
950 i
= this->type
->length
- 1;
952 return array_elements
[i
];
956 ir_constant::get_record_field(const char *name
)
958 int idx
= this->type
->field_index(name
);
963 if (this->components
.is_empty())
966 exec_node
*node
= this->components
.head
;
967 for (int i
= 0; i
< idx
; i
++) {
970 /* If the end of the list is encountered before the element matching the
971 * requested field is found, return NULL.
973 if (node
->is_tail_sentinel())
977 return (ir_constant
*) node
;
981 ir_constant::copy_offset(ir_constant
*src
, int offset
)
983 switch (this->type
->base_type
) {
986 case GLSL_TYPE_FLOAT
:
987 case GLSL_TYPE_BOOL
: {
988 unsigned int size
= src
->type
->components();
989 assert (size
<= this->type
->components() - offset
);
990 for (unsigned int i
=0; i
<size
; i
++) {
991 switch (this->type
->base_type
) {
993 value
.u
[i
+offset
] = src
->get_uint_component(i
);
996 value
.i
[i
+offset
] = src
->get_int_component(i
);
998 case GLSL_TYPE_FLOAT
:
999 value
.f
[i
+offset
] = src
->get_float_component(i
);
1001 case GLSL_TYPE_BOOL
:
1002 value
.b
[i
+offset
] = src
->get_bool_component(i
);
1004 default: // Shut up the compiler
1011 case GLSL_TYPE_STRUCT
: {
1012 assert (src
->type
== this->type
);
1013 this->components
.make_empty();
1014 foreach_in_list(ir_constant
, orig
, &src
->components
) {
1015 this->components
.push_tail(orig
->clone(this, NULL
));
1020 case GLSL_TYPE_ARRAY
: {
1021 assert (src
->type
== this->type
);
1022 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1023 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1029 assert(!"Should not get here.");
1035 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1037 assert (!type
->is_array() && !type
->is_record());
1039 if (!type
->is_vector() && !type
->is_matrix()) {
1045 for (int i
=0; i
<4; i
++) {
1046 if (mask
& (1 << i
)) {
1047 switch (this->type
->base_type
) {
1048 case GLSL_TYPE_UINT
:
1049 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1052 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1054 case GLSL_TYPE_FLOAT
:
1055 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1057 case GLSL_TYPE_BOOL
:
1058 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1061 assert(!"Should not get here.");
1069 ir_constant::has_value(const ir_constant
*c
) const
1071 if (this->type
!= c
->type
)
1074 if (this->type
->is_array()) {
1075 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1076 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1082 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1083 const exec_node
*a_node
= this->components
.head
;
1084 const exec_node
*b_node
= c
->components
.head
;
1086 while (!a_node
->is_tail_sentinel()) {
1087 assert(!b_node
->is_tail_sentinel());
1089 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1090 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1092 if (!a_field
->has_value(b_field
))
1095 a_node
= a_node
->next
;
1096 b_node
= b_node
->next
;
1102 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1103 switch (this->type
->base_type
) {
1104 case GLSL_TYPE_UINT
:
1105 if (this->value
.u
[i
] != c
->value
.u
[i
])
1109 if (this->value
.i
[i
] != c
->value
.i
[i
])
1112 case GLSL_TYPE_FLOAT
:
1113 if (this->value
.f
[i
] != c
->value
.f
[i
])
1116 case GLSL_TYPE_BOOL
:
1117 if (this->value
.b
[i
] != c
->value
.b
[i
])
1121 assert(!"Should not get here.");
1130 ir_constant::is_value(float f
, int i
) const
1132 if (!this->type
->is_scalar() && !this->type
->is_vector())
1135 /* Only accept boolean values for 0/1. */
1136 if (int(bool(i
)) != i
&& this->type
->is_boolean())
1139 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1140 switch (this->type
->base_type
) {
1141 case GLSL_TYPE_FLOAT
:
1142 if (this->value
.f
[c
] != f
)
1146 if (this->value
.i
[c
] != i
)
1149 case GLSL_TYPE_UINT
:
1150 if (this->value
.u
[c
] != unsigned(i
))
1153 case GLSL_TYPE_BOOL
:
1154 if (this->value
.b
[c
] != bool(i
))
1158 /* The only other base types are structures, arrays, and samplers.
1159 * Samplers cannot be constants, and the others should have been
1160 * filtered out above.
1162 assert(!"Should not get here.");
1171 ir_constant::is_zero() const
1173 return is_value(0.0, 0);
1177 ir_constant::is_one() const
1179 return is_value(1.0, 1);
1183 ir_constant::is_negative_one() const
1185 return is_value(-1.0, -1);
1189 ir_constant::is_uint16_constant() const
1191 if (!type
->is_integer())
1194 return value
.u
[0] < (1 << 16);
1198 : ir_instruction(ir_type_loop
)
1203 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1204 : ir_dereference(ir_type_dereference_variable
)
1206 assert(var
!= NULL
);
1209 this->type
= var
->type
;
1213 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1214 ir_rvalue
*array_index
)
1215 : ir_dereference(ir_type_dereference_array
)
1217 this->array_index
= array_index
;
1218 this->set_array(value
);
1222 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1223 ir_rvalue
*array_index
)
1224 : ir_dereference(ir_type_dereference_array
)
1226 void *ctx
= ralloc_parent(var
);
1228 this->array_index
= array_index
;
1229 this->set_array(new(ctx
) ir_dereference_variable(var
));
1234 ir_dereference_array::set_array(ir_rvalue
*value
)
1236 assert(value
!= NULL
);
1238 this->array
= value
;
1240 const glsl_type
*const vt
= this->array
->type
;
1242 if (vt
->is_array()) {
1243 type
= vt
->element_type();
1244 } else if (vt
->is_matrix()) {
1245 type
= vt
->column_type();
1246 } else if (vt
->is_vector()) {
1247 type
= vt
->get_base_type();
1252 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1254 : ir_dereference(ir_type_dereference_record
)
1256 assert(value
!= NULL
);
1258 this->record
= value
;
1259 this->field
= ralloc_strdup(this, field
);
1260 this->type
= this->record
->type
->field_type(field
);
1264 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1266 : ir_dereference(ir_type_dereference_record
)
1268 void *ctx
= ralloc_parent(var
);
1270 this->record
= new(ctx
) ir_dereference_variable(var
);
1271 this->field
= ralloc_strdup(this, field
);
1272 this->type
= this->record
->type
->field_type(field
);
1276 ir_dereference::is_lvalue() const
1278 ir_variable
*var
= this->variable_referenced();
1280 /* Every l-value derference chain eventually ends in a variable.
1282 if ((var
== NULL
) || var
->data
.read_only
)
1285 /* From section 4.1.7 of the GLSL 4.40 spec:
1287 * "Opaque variables cannot be treated as l-values; hence cannot
1288 * be used as out or inout function parameters, nor can they be
1291 if (this->type
->contains_opaque())
1298 static const char * const tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod", "tg4", "query_levels" };
1300 const char *ir_texture::opcode_string()
1302 assert((unsigned int) op
<=
1303 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1304 return tex_opcode_strs
[op
];
1308 ir_texture::get_opcode(const char *str
)
1310 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1311 for (int op
= 0; op
< count
; op
++) {
1312 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1313 return (ir_texture_opcode
) op
;
1315 return (ir_texture_opcode
) -1;
1320 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1322 assert(sampler
!= NULL
);
1323 assert(type
!= NULL
);
1324 this->sampler
= sampler
;
1327 if (this->op
== ir_txs
|| this->op
== ir_query_levels
) {
1328 assert(type
->base_type
== GLSL_TYPE_INT
);
1329 } else if (this->op
== ir_lod
) {
1330 assert(type
->vector_elements
== 2);
1331 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1333 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1334 if (sampler
->type
->sampler_shadow
)
1335 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1337 assert(type
->vector_elements
== 4);
1343 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1345 assert((count
>= 1) && (count
<= 4));
1347 memset(&this->mask
, 0, sizeof(this->mask
));
1348 this->mask
.num_components
= count
;
1350 unsigned dup_mask
= 0;
1353 assert(comp
[3] <= 3);
1354 dup_mask
|= (1U << comp
[3])
1355 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1356 this->mask
.w
= comp
[3];
1359 assert(comp
[2] <= 3);
1360 dup_mask
|= (1U << comp
[2])
1361 & ((1U << comp
[0]) | (1U << comp
[1]));
1362 this->mask
.z
= comp
[2];
1365 assert(comp
[1] <= 3);
1366 dup_mask
|= (1U << comp
[1])
1367 & ((1U << comp
[0]));
1368 this->mask
.y
= comp
[1];
1371 assert(comp
[0] <= 3);
1372 this->mask
.x
= comp
[0];
1375 this->mask
.has_duplicates
= dup_mask
!= 0;
1377 /* Based on the number of elements in the swizzle and the base type
1378 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1379 * generate the type of the resulting value.
1381 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1384 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1385 unsigned w
, unsigned count
)
1386 : ir_rvalue(ir_type_swizzle
), val(val
)
1388 const unsigned components
[4] = { x
, y
, z
, w
};
1389 this->init_mask(components
, count
);
1392 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1394 : ir_rvalue(ir_type_swizzle
), val(val
)
1396 this->init_mask(comp
, count
);
1399 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1400 : ir_rvalue(ir_type_swizzle
)
1404 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1405 mask
.num_components
, 1);
1414 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1416 void *ctx
= ralloc_parent(val
);
1418 /* For each possible swizzle character, this table encodes the value in
1419 * \c idx_map that represents the 0th element of the vector. For invalid
1420 * swizzle characters (e.g., 'k'), a special value is used that will allow
1421 * detection of errors.
1423 static const unsigned char base_idx
[26] = {
1424 /* a b c d e f g h i j k l m */
1425 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1426 /* n o p q r s t u v w x y z */
1427 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1430 /* Each valid swizzle character has an entry in the previous table. This
1431 * table encodes the base index encoded in the previous table plus the actual
1432 * index of the swizzle character. When processing swizzles, the first
1433 * character in the string is indexed in the previous table. Each character
1434 * in the string is indexed in this table, and the value found there has the
1435 * value form the first table subtracted. The result must be on the range
1438 * For example, the string "wzyx" will get X from the first table. Each of
1439 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1440 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1442 * The string "wzrg" will get X from the first table. Each of the characters
1443 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1444 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1445 * [0,3], the error is detected.
1447 static const unsigned char idx_map
[26] = {
1448 /* a b c d e f g h i j k l m */
1449 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1450 /* n o p q r s t u v w x y z */
1451 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1454 int swiz_idx
[4] = { 0, 0, 0, 0 };
1458 /* Validate the first character in the swizzle string and look up the base
1459 * index value as described above.
1461 if ((str
[0] < 'a') || (str
[0] > 'z'))
1464 const unsigned base
= base_idx
[str
[0] - 'a'];
1467 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1468 /* Validate the next character, and, as described above, convert it to a
1471 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1474 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1475 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1482 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1492 ir_swizzle::variable_referenced() const
1494 return this->val
->variable_referenced();
1498 bool ir_variable::temporaries_allocate_names
= false;
1500 const char ir_variable::tmp_name
[] = "compiler_temp";
1502 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1503 ir_variable_mode mode
)
1504 : ir_instruction(ir_type_variable
)
1508 if (mode
== ir_var_temporary
&& !ir_variable::temporaries_allocate_names
)
1511 /* The ir_variable clone method may call this constructor with name set to
1515 || mode
== ir_var_temporary
1516 || mode
== ir_var_function_in
1517 || mode
== ir_var_function_out
1518 || mode
== ir_var_function_inout
);
1519 assert(name
!= ir_variable::tmp_name
1520 || mode
== ir_var_temporary
);
1521 if (mode
== ir_var_temporary
1522 && (name
== NULL
|| name
== ir_variable::tmp_name
)) {
1523 this->name
= ir_variable::tmp_name
;
1525 this->name
= ralloc_strdup(this, name
);
1528 this->u
.max_ifc_array_access
= NULL
;
1530 this->data
.explicit_location
= false;
1531 this->data
.has_initializer
= false;
1532 this->data
.location
= -1;
1533 this->data
.location_frac
= 0;
1534 this->data
.binding
= 0;
1535 this->data
.warn_extension_index
= 0;
1536 this->constant_value
= NULL
;
1537 this->constant_initializer
= NULL
;
1538 this->data
.origin_upper_left
= false;
1539 this->data
.pixel_center_integer
= false;
1540 this->data
.depth_layout
= ir_depth_layout_none
;
1541 this->data
.used
= false;
1542 this->data
.read_only
= false;
1543 this->data
.centroid
= false;
1544 this->data
.sample
= false;
1545 this->data
.invariant
= false;
1546 this->data
.how_declared
= ir_var_declared_normally
;
1547 this->data
.mode
= mode
;
1548 this->data
.interpolation
= INTERP_QUALIFIER_NONE
;
1549 this->data
.max_array_access
= 0;
1550 this->data
.atomic
.offset
= 0;
1551 this->data
.image_read_only
= false;
1552 this->data
.image_write_only
= false;
1553 this->data
.image_coherent
= false;
1554 this->data
.image_volatile
= false;
1555 this->data
.image_restrict
= false;
1558 if (type
->base_type
== GLSL_TYPE_SAMPLER
)
1559 this->data
.read_only
= true;
1561 if (type
->is_interface())
1562 this->init_interface_type(type
);
1563 else if (type
->is_array() && type
->fields
.array
->is_interface())
1564 this->init_interface_type(type
->fields
.array
);
1570 interpolation_string(unsigned interpolation
)
1572 switch (interpolation
) {
1573 case INTERP_QUALIFIER_NONE
: return "no";
1574 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1575 case INTERP_QUALIFIER_FLAT
: return "flat";
1576 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1579 assert(!"Should not get here.");
1584 glsl_interp_qualifier
1585 ir_variable::determine_interpolation_mode(bool flat_shade
)
1587 if (this->data
.interpolation
!= INTERP_QUALIFIER_NONE
)
1588 return (glsl_interp_qualifier
) this->data
.interpolation
;
1589 int location
= this->data
.location
;
1591 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1592 if (flat_shade
&& is_gl_Color
)
1593 return INTERP_QUALIFIER_FLAT
;
1595 return INTERP_QUALIFIER_SMOOTH
;
1598 const char *const ir_variable::warn_extension_table
[] = {
1600 "GL_ARB_shader_stencil_export",
1601 "GL_AMD_shader_stencil_export",
1605 ir_variable::enable_extension_warning(const char *extension
)
1607 for (unsigned i
= 0; i
< Elements(warn_extension_table
); i
++) {
1608 if (strcmp(warn_extension_table
[i
], extension
) == 0) {
1609 this->data
.warn_extension_index
= i
;
1614 assert(!"Should not get here.");
1615 this->data
.warn_extension_index
= 0;
1619 ir_variable::get_extension_warning() const
1621 return this->data
.warn_extension_index
== 0
1622 ? NULL
: warn_extension_table
[this->data
.warn_extension_index
];
1625 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1626 builtin_available_predicate b
)
1627 : ir_instruction(ir_type_function_signature
),
1628 return_type(return_type
), is_defined(false), is_intrinsic(false),
1629 builtin_avail(b
), _function(NULL
)
1631 this->origin
= NULL
;
1636 ir_function_signature::is_builtin() const
1638 return builtin_avail
!= NULL
;
1643 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1645 /* We can't call the predicate without a state pointer, so just say that
1646 * the signature is available. At compile time, we need the filtering,
1647 * but also receive a valid state pointer. At link time, we're resolving
1648 * imported built-in prototypes to their definitions, which will always
1649 * be an exact match. So we can skip the filtering.
1654 assert(builtin_avail
!= NULL
);
1655 return builtin_avail(state
);
1660 modes_match(unsigned a
, unsigned b
)
1665 /* Accept "in" vs. "const in" */
1666 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1667 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1675 ir_function_signature::qualifiers_match(exec_list
*params
)
1677 /* check that the qualifiers match. */
1678 foreach_two_lists(a_node
, &this->parameters
, b_node
, params
) {
1679 ir_variable
*a
= (ir_variable
*) a_node
;
1680 ir_variable
*b
= (ir_variable
*) b_node
;
1682 if (a
->data
.read_only
!= b
->data
.read_only
||
1683 !modes_match(a
->data
.mode
, b
->data
.mode
) ||
1684 a
->data
.interpolation
!= b
->data
.interpolation
||
1685 a
->data
.centroid
!= b
->data
.centroid
||
1686 a
->data
.sample
!= b
->data
.sample
||
1687 a
->data
.image_read_only
!= b
->data
.image_read_only
||
1688 a
->data
.image_write_only
!= b
->data
.image_write_only
||
1689 a
->data
.image_coherent
!= b
->data
.image_coherent
||
1690 a
->data
.image_volatile
!= b
->data
.image_volatile
||
1691 a
->data
.image_restrict
!= b
->data
.image_restrict
) {
1693 /* parameter a's qualifiers don't match */
1702 ir_function_signature::replace_parameters(exec_list
*new_params
)
1704 /* Destroy all of the previous parameter information. If the previous
1705 * parameter information comes from the function prototype, it may either
1706 * specify incorrect parameter names or not have names at all.
1708 new_params
->move_nodes_to(¶meters
);
1712 ir_function::ir_function(const char *name
)
1713 : ir_instruction(ir_type_function
)
1715 this->name
= ralloc_strdup(this, name
);
1720 ir_function::has_user_signature()
1722 foreach_in_list(ir_function_signature
, sig
, &this->signatures
) {
1723 if (!sig
->is_builtin())
1731 ir_rvalue::error_value(void *mem_ctx
)
1733 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue(ir_type_unset
);
1735 v
->type
= glsl_type::error_type
;
1741 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1743 foreach_in_list_safe(ir_instruction
, node
, list
) {
1744 node
->accept(visitor
);
1750 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1752 ir_variable
*var
= ir
->as_variable();
1753 ir_constant
*constant
= ir
->as_constant();
1754 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1755 steal_memory(var
->constant_value
, ir
);
1757 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1758 steal_memory(var
->constant_initializer
, ir
);
1760 /* The components of aggregate constants are not visited by the normal
1761 * visitor, so steal their values by hand.
1763 if (constant
!= NULL
) {
1764 if (constant
->type
->is_record()) {
1765 foreach_in_list(ir_constant
, field
, &constant
->components
) {
1766 steal_memory(field
, ir
);
1768 } else if (constant
->type
->is_array()) {
1769 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1770 steal_memory(constant
->array_elements
[i
], ir
);
1775 ralloc_steal(new_ctx
, ir
);
1780 reparent_ir(exec_list
*list
, void *mem_ctx
)
1782 foreach_in_list(ir_instruction
, node
, list
) {
1783 visit_tree(node
, steal_memory
, mem_ctx
);
1789 try_min_one(ir_rvalue
*ir
)
1791 ir_expression
*expr
= ir
->as_expression();
1793 if (!expr
|| expr
->operation
!= ir_binop_min
)
1796 if (expr
->operands
[0]->is_one())
1797 return expr
->operands
[1];
1799 if (expr
->operands
[1]->is_one())
1800 return expr
->operands
[0];
1806 try_max_zero(ir_rvalue
*ir
)
1808 ir_expression
*expr
= ir
->as_expression();
1810 if (!expr
|| expr
->operation
!= ir_binop_max
)
1813 if (expr
->operands
[0]->is_zero())
1814 return expr
->operands
[1];
1816 if (expr
->operands
[1]->is_zero())
1817 return expr
->operands
[0];
1823 ir_rvalue::as_rvalue_to_saturate()
1825 ir_expression
*expr
= this->as_expression();
1830 ir_rvalue
*max_zero
= try_max_zero(expr
);
1832 return try_min_one(max_zero
);
1834 ir_rvalue
*min_one
= try_min_one(expr
);
1836 return try_max_zero(min_one
);
1845 vertices_per_prim(GLenum prim
)
1854 case GL_LINES_ADJACENCY
:
1856 case GL_TRIANGLES_ADJACENCY
:
1859 assert(!"Bad primitive");
1865 * Generate a string describing the mode of a variable
1868 mode_string(const ir_variable
*var
)
1870 switch (var
->data
.mode
) {
1872 return (var
->data
.read_only
) ? "global constant" : "global variable";
1874 case ir_var_uniform
:
1877 case ir_var_shader_in
:
1878 return "shader input";
1880 case ir_var_shader_out
:
1881 return "shader output";
1883 case ir_var_function_in
:
1884 case ir_var_const_in
:
1885 return "function input";
1887 case ir_var_function_out
:
1888 return "function output";
1890 case ir_var_function_inout
:
1891 return "function inout";
1893 case ir_var_system_value
:
1894 return "shader input";
1896 case ir_var_temporary
:
1897 return "compiler temporary";
1899 case ir_var_mode_count
:
1903 assert(!"Should not get here.");
1904 return "invalid variable";