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 "glsl_symbol_table.h"
26 #include "glsl_types.h"
28 #include "main/core.h" /* for MIN2 */
31 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
34 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
35 struct _mesa_glsl_parse_state
*state
);
38 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
39 exec_list
*parameters
,
40 struct _mesa_glsl_parse_state
*state
)
44 foreach_list (n
, parameters
) {
45 ast_node
*const ast
= exec_node_data(ast_node
, n
, link
);
46 ir_rvalue
*result
= ast
->hir(instructions
, state
);
48 ir_constant
*const constant
= result
->constant_expression_value();
52 actual_parameters
->push_tail(result
);
61 * Generate a source prototype for a function signature
63 * \param return_type Return type of the function. May be \c NULL.
64 * \param name Name of the function.
65 * \param parameters Parameter list for the function. This may be either a
66 * formal or actual parameter list. Only the type is used.
69 * A talloced string representing the prototype of the function.
72 prototype_string(const glsl_type
*return_type
, const char *name
,
73 exec_list
*parameters
)
77 if (return_type
!= NULL
)
78 str
= talloc_asprintf(str
, "%s ", return_type
->name
);
80 str
= talloc_asprintf_append(str
, "%s(", name
);
82 const char *comma
= "";
83 foreach_list(node
, parameters
) {
84 const ir_instruction
*const param
= (ir_instruction
*) node
;
86 str
= talloc_asprintf_append(str
, "%s%s", comma
, param
->type
->name
);
90 str
= talloc_strdup_append(str
, ")");
96 match_function_by_name(exec_list
*instructions
, const char *name
,
97 YYLTYPE
*loc
, exec_list
*actual_parameters
,
98 struct _mesa_glsl_parse_state
*state
)
101 ir_function
*f
= state
->symbols
->get_function(name
);
102 ir_function_signature
*sig
;
104 sig
= f
? f
->matching_signature(actual_parameters
) : NULL
;
106 /* FINISHME: This doesn't handle the case where shader X contains a
107 * FINISHME: matching signature but shader X + N contains an _exact_
108 * FINISHME: matching signature.
110 if (sig
== NULL
&& (f
== NULL
|| state
->es_shader
|| !f
->has_user_signature()) && state
->symbols
->get_type(name
) == NULL
&& (state
->language_version
== 110 || state
->symbols
->get_variable(name
) == NULL
)) {
111 /* The current shader doesn't contain a matching function or signature.
112 * Before giving up, look for the prototype in the built-in functions.
114 for (unsigned i
= 0; i
< state
->num_builtins_to_link
; i
++) {
115 ir_function
*builtin
;
116 builtin
= state
->builtins_to_link
[i
]->symbols
->get_function(name
);
117 sig
= builtin
? builtin
->matching_signature(actual_parameters
) : NULL
;
120 f
= new(ctx
) ir_function(name
);
121 state
->symbols
->add_global_function(f
);
122 emit_function(state
, instructions
, f
);
125 f
->add_signature(sig
->clone_prototype(f
, NULL
));
132 /* Verify that 'out' and 'inout' actual parameters are lvalues. This
133 * isn't done in ir_function::matching_signature because that function
134 * cannot generate the necessary diagnostics.
136 exec_list_iterator actual_iter
= actual_parameters
->iterator();
137 exec_list_iterator formal_iter
= sig
->parameters
.iterator();
139 while (actual_iter
.has_next()) {
140 ir_rvalue
*actual
= (ir_rvalue
*) actual_iter
.get();
141 ir_variable
*formal
= (ir_variable
*) formal_iter
.get();
143 assert(actual
!= NULL
);
144 assert(formal
!= NULL
);
146 if ((formal
->mode
== ir_var_out
)
147 || (formal
->mode
== ir_var_inout
)) {
148 if (! actual
->is_lvalue()) {
149 /* FINISHME: Log a better diagnostic here. There is no way
150 * FINISHME: to tell the user which parameter is invalid.
152 _mesa_glsl_error(loc
, state
, "`%s' parameter is not lvalue",
153 (formal
->mode
== ir_var_out
) ? "out" : "inout");
157 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
158 ir_rvalue
*converted
= convert_component(actual
, formal
->type
);
159 actual
->replace_with(converted
);
166 /* Always insert the call in the instruction stream, and return a deref
167 * of its return val if it returns a value, since we don't know if
168 * the rvalue is going to be assigned to anything or not.
170 ir_call
*call
= new(ctx
) ir_call(sig
, actual_parameters
);
171 if (!sig
->return_type
->is_void()) {
173 ir_dereference_variable
*deref
;
175 var
= new(ctx
) ir_variable(sig
->return_type
,
176 talloc_asprintf(ctx
, "%s_retval",
177 sig
->function_name()),
179 instructions
->push_tail(var
);
181 deref
= new(ctx
) ir_dereference_variable(var
);
182 ir_assignment
*assign
= new(ctx
) ir_assignment(deref
, call
, NULL
);
183 instructions
->push_tail(assign
);
184 if (state
->language_version
>= 120)
185 var
->constant_value
= call
->constant_expression_value();
187 deref
= new(ctx
) ir_dereference_variable(var
);
190 instructions
->push_tail(call
);
194 char *str
= prototype_string(NULL
, name
, actual_parameters
);
196 _mesa_glsl_error(loc
, state
, "no matching function for call to `%s'",
200 const char *prefix
= "candidates are: ";
202 for (int i
= -1; i
< state
->num_builtins_to_link
; i
++) {
203 glsl_symbol_table
*syms
= i
>= 0 ? state
->builtins_to_link
[i
]->symbols
205 f
= syms
->get_function(name
);
209 foreach_list (node
, &f
->signatures
) {
210 ir_function_signature
*sig
= (ir_function_signature
*) node
;
212 str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
213 _mesa_glsl_error(loc
, state
, "%s%s\n", prefix
, str
);
221 return ir_call::get_error_instruction(ctx
);
227 * Perform automatic type conversion of constructor parameters
229 * This implements the rules in the "Conversion and Scalar Constructors"
230 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
233 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
235 void *ctx
= talloc_parent(src
);
236 const unsigned a
= desired_type
->base_type
;
237 const unsigned b
= src
->type
->base_type
;
238 ir_expression
*result
= NULL
;
240 if (src
->type
->is_error())
243 assert(a
<= GLSL_TYPE_BOOL
);
244 assert(b
<= GLSL_TYPE_BOOL
);
246 if ((a
== b
) || (src
->type
->is_integer() && desired_type
->is_integer()))
252 if (b
== GLSL_TYPE_FLOAT
)
253 result
= new(ctx
) ir_expression(ir_unop_f2i
, desired_type
, src
, NULL
);
255 assert(b
== GLSL_TYPE_BOOL
);
256 result
= new(ctx
) ir_expression(ir_unop_b2i
, desired_type
, src
, NULL
);
259 case GLSL_TYPE_FLOAT
:
262 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
265 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
268 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
276 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
278 case GLSL_TYPE_FLOAT
:
279 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
285 assert(result
!= NULL
);
287 /* Try constant folding; it may fold in the conversion we just added. */
288 ir_constant
*const constant
= result
->constant_expression_value();
289 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
293 * Dereference a specific component from a scalar, vector, or matrix
296 dereference_component(ir_rvalue
*src
, unsigned component
)
298 void *ctx
= talloc_parent(src
);
299 assert(component
< src
->type
->components());
301 /* If the source is a constant, just create a new constant instead of a
302 * dereference of the existing constant.
304 ir_constant
*constant
= src
->as_constant();
306 return new(ctx
) ir_constant(constant
, component
);
308 if (src
->type
->is_scalar()) {
310 } else if (src
->type
->is_vector()) {
311 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
313 assert(src
->type
->is_matrix());
315 /* Dereference a row of the matrix, then call this function again to get
316 * a specific element from that row.
318 const int c
= component
/ src
->type
->column_type()->vector_elements
;
319 const int r
= component
% src
->type
->column_type()->vector_elements
;
320 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
321 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
323 col
->type
= src
->type
->column_type();
325 return dereference_component(col
, r
);
328 assert(!"Should not get here.");
334 process_array_constructor(exec_list
*instructions
,
335 const glsl_type
*constructor_type
,
336 YYLTYPE
*loc
, exec_list
*parameters
,
337 struct _mesa_glsl_parse_state
*state
)
340 /* Array constructors come in two forms: sized and unsized. Sized array
341 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
342 * variables. In this case the number of parameters must exactly match the
343 * specified size of the array.
345 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
346 * are vec4 variables. In this case the size of the array being constructed
347 * is determined by the number of parameters.
349 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
351 * "There must be exactly the same number of arguments as the size of
352 * the array being constructed. If no size is present in the
353 * constructor, then the array is explicitly sized to the number of
354 * arguments provided. The arguments are assigned in order, starting at
355 * element 0, to the elements of the constructed array. Each argument
356 * must be the same type as the element type of the array, or be a type
357 * that can be converted to the element type of the array according to
358 * Section 4.1.10 "Implicit Conversions.""
360 exec_list actual_parameters
;
361 const unsigned parameter_count
=
362 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
364 if ((parameter_count
== 0)
365 || ((constructor_type
->length
!= 0)
366 && (constructor_type
->length
!= parameter_count
))) {
367 const unsigned min_param
= (constructor_type
->length
== 0)
368 ? 1 : constructor_type
->length
;
370 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
372 (constructor_type
->length
!= 0) ? "at least" : "exactly",
373 min_param
, (min_param
<= 1) ? "" : "s");
374 return ir_call::get_error_instruction(ctx
);
377 if (constructor_type
->length
== 0) {
379 glsl_type::get_array_instance(constructor_type
->element_type(),
381 assert(constructor_type
!= NULL
);
382 assert(constructor_type
->length
== parameter_count
);
385 bool all_parameters_are_constant
= true;
387 /* Type cast each parameter and, if possible, fold constants. */
388 foreach_list_safe(n
, &actual_parameters
) {
389 ir_rvalue
*ir
= (ir_rvalue
*) n
;
390 ir_rvalue
*result
= ir
;
392 /* Apply implicit conversions (not the scalar constructor rules!) */
393 if (constructor_type
->element_type()->is_float()) {
394 const glsl_type
*desired_type
=
395 glsl_type::get_instance(GLSL_TYPE_FLOAT
,
396 ir
->type
->vector_elements
,
397 ir
->type
->matrix_columns
);
398 result
= convert_component(ir
, desired_type
);
401 if (result
->type
!= constructor_type
->element_type()) {
402 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
403 "expected: %s, found %s",
404 constructor_type
->element_type()->name
,
408 /* Attempt to convert the parameter to a constant valued expression.
409 * After doing so, track whether or not all the parameters to the
410 * constructor are trivially constant valued expressions.
412 ir_rvalue
*const constant
= result
->constant_expression_value();
414 if (constant
!= NULL
)
417 all_parameters_are_constant
= false;
419 ir
->replace_with(result
);
422 if (all_parameters_are_constant
)
423 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
425 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
427 instructions
->push_tail(var
);
430 foreach_list(node
, &actual_parameters
) {
431 ir_rvalue
*rhs
= (ir_rvalue
*) node
;
432 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
433 new(ctx
) ir_constant(i
));
435 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
436 instructions
->push_tail(assignment
);
441 return new(ctx
) ir_dereference_variable(var
);
446 * Try to convert a record constructor to a constant expression
449 constant_record_constructor(const glsl_type
*constructor_type
,
450 exec_list
*parameters
, void *mem_ctx
)
452 foreach_list(node
, parameters
) {
453 ir_constant
*constant
= ((ir_instruction
*) node
)->as_constant();
454 if (constant
== NULL
)
456 node
->replace_with(constant
);
459 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
464 * Determine if a list consists of a single scalar r-value
467 single_scalar_parameter(exec_list
*parameters
)
469 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
470 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
472 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
477 * Generate inline code for a vector constructor
479 * The generated constructor code will consist of a temporary variable
480 * declaration of the same type as the constructor. A sequence of assignments
481 * from constructor parameters to the temporary will follow.
484 * An \c ir_dereference_variable of the temprorary generated in the constructor
488 emit_inline_vector_constructor(const glsl_type
*type
,
489 exec_list
*instructions
,
490 exec_list
*parameters
,
493 assert(!parameters
->is_empty());
495 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
496 instructions
->push_tail(var
);
498 /* There are two kinds of vector constructors.
500 * - Construct a vector from a single scalar by replicating that scalar to
501 * all components of the vector.
503 * - Construct a vector from an arbirary combination of vectors and
504 * scalars. The components of the constructor parameters are assigned
505 * to the vector in order until the vector is full.
507 const unsigned lhs_components
= type
->components();
508 if (single_scalar_parameter(parameters
)) {
509 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
510 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
512 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
513 const unsigned mask
= (1U << lhs_components
) - 1;
515 assert(rhs
->type
== lhs
->type
);
517 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
518 instructions
->push_tail(inst
);
520 unsigned base_component
= 0;
521 unsigned base_lhs_component
= 0;
522 ir_constant_data data
;
523 unsigned constant_mask
= 0, constant_components
= 0;
525 memset(&data
, 0, sizeof(data
));
527 foreach_list(node
, parameters
) {
528 ir_rvalue
*param
= (ir_rvalue
*) node
;
529 unsigned rhs_components
= param
->type
->components();
531 /* Do not try to assign more components to the vector than it has!
533 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
534 rhs_components
= lhs_components
- base_lhs_component
;
537 const ir_constant
*const c
= param
->as_constant();
539 for (unsigned i
= 0; i
< rhs_components
; i
++) {
540 switch (c
->type
->base_type
) {
542 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
545 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
547 case GLSL_TYPE_FLOAT
:
548 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
551 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
554 assert(!"Should not get here.");
559 /* Mask of fields to be written in the assignment.
561 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
562 constant_components
+= rhs_components
;
564 base_component
+= rhs_components
;
566 /* Advance the component index by the number of components
567 * that were just assigned.
569 base_lhs_component
+= rhs_components
;
572 if (constant_mask
!= 0) {
573 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
574 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
577 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
579 ir_instruction
*inst
=
580 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
581 instructions
->push_tail(inst
);
585 foreach_list(node
, parameters
) {
586 ir_rvalue
*param
= (ir_rvalue
*) node
;
587 unsigned rhs_components
= param
->type
->components();
589 /* Do not try to assign more components to the vector than it has!
591 if ((rhs_components
+ base_component
) > lhs_components
) {
592 rhs_components
= lhs_components
- base_component
;
595 const ir_constant
*const c
= param
->as_constant();
597 /* Mask of fields to be written in the assignment.
599 const unsigned write_mask
= ((1U << rhs_components
) - 1)
602 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
604 /* Generate a swizzle so that LHS and RHS sizes match.
607 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
609 ir_instruction
*inst
=
610 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
611 instructions
->push_tail(inst
);
614 /* Advance the component index by the number of components that were
617 base_component
+= rhs_components
;
620 return new(ctx
) ir_dereference_variable(var
);
625 * Generate assignment of a portion of a vector to a portion of a matrix column
627 * \param src_base First component of the source to be used in assignment
628 * \param column Column of destination to be assiged
629 * \param row_base First component of the destination column to be assigned
630 * \param count Number of components to be assigned
633 * \c src_base + \c count must be less than or equal to the number of components
634 * in the source vector.
637 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
638 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
641 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
642 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
644 assert(column_ref
->type
->components() >= (row_base
+ count
));
645 assert(src
->type
->components() >= (src_base
+ count
));
647 /* Generate a swizzle that extracts the number of components from the source
648 * that are to be assigned to the column of the matrix.
650 if (count
< src
->type
->vector_elements
) {
651 src
= new(mem_ctx
) ir_swizzle(src
,
652 src_base
+ 0, src_base
+ 1,
653 src_base
+ 2, src_base
+ 3,
657 /* Mask of fields to be written in the assignment.
659 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
661 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
666 * Generate inline code for a matrix constructor
668 * The generated constructor code will consist of a temporary variable
669 * declaration of the same type as the constructor. A sequence of assignments
670 * from constructor parameters to the temporary will follow.
673 * An \c ir_dereference_variable of the temprorary generated in the constructor
677 emit_inline_matrix_constructor(const glsl_type
*type
,
678 exec_list
*instructions
,
679 exec_list
*parameters
,
682 assert(!parameters
->is_empty());
684 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
685 instructions
->push_tail(var
);
687 /* There are three kinds of matrix constructors.
689 * - Construct a matrix from a single scalar by replicating that scalar to
690 * along the diagonal of the matrix and setting all other components to
693 * - Construct a matrix from an arbirary combination of vectors and
694 * scalars. The components of the constructor parameters are assigned
695 * to the matrix in colum-major order until the matrix is full.
697 * - Construct a matrix from a single matrix. The source matrix is copied
698 * to the upper left portion of the constructed matrix, and the remaining
699 * elements take values from the identity matrix.
701 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
702 if (single_scalar_parameter(parameters
)) {
703 /* Assign the scalar to the X component of a vec4, and fill the remaining
704 * components with zero.
706 ir_variable
*rhs_var
=
707 new(ctx
) ir_variable(glsl_type::vec4_type
, "mat_ctor_vec",
709 instructions
->push_tail(rhs_var
);
711 ir_constant_data zero
;
717 ir_instruction
*inst
=
718 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
719 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
721 instructions
->push_tail(inst
);
723 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
725 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
726 instructions
->push_tail(inst
);
728 /* Assign the temporary vector to each column of the destination matrix
729 * with a swizzle that puts the X component on the diagonal of the
730 * matrix. In some cases this may mean that the X component does not
731 * get assigned into the column at all (i.e., when the matrix has more
732 * columns than rows).
734 static const unsigned rhs_swiz
[4][4] = {
741 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
742 type
->vector_elements
);
743 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
744 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
745 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
747 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
748 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
749 type
->vector_elements
);
751 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
752 instructions
->push_tail(inst
);
755 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
756 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
757 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
759 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
760 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
761 type
->vector_elements
);
763 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
764 instructions
->push_tail(inst
);
766 } else if (first_param
->type
->is_matrix()) {
767 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
769 * "If a matrix is constructed from a matrix, then each component
770 * (column i, row j) in the result that has a corresponding
771 * component (column i, row j) in the argument will be initialized
772 * from there. All other components will be initialized to the
773 * identity matrix. If a matrix argument is given to a matrix
774 * constructor, it is an error to have any other arguments."
776 assert(first_param
->next
->is_tail_sentinel());
777 ir_rvalue
*const src_matrix
= first_param
;
779 /* If the source matrix is smaller, pre-initialize the relavent parts of
780 * the destination matrix to the identity matrix.
782 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
783 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
785 /* If the source matrix has fewer rows, every column of the destination
786 * must be initialized. Otherwise only the columns in the destination
787 * that do not exist in the source must be initialized.
790 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
791 ? 0 : src_matrix
->type
->matrix_columns
;
793 const glsl_type
*const col_type
= var
->type
->column_type();
794 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
795 ir_constant_data ident
;
804 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
806 ir_rvalue
*const lhs
=
807 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
809 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
810 instructions
->push_tail(inst
);
814 /* Assign columns from the source matrix to the destination matrix.
816 * Since the parameter will be used in the RHS of multiple assignments,
817 * generate a temporary and copy the paramter there.
819 ir_variable
*const rhs_var
=
820 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
822 instructions
->push_tail(rhs_var
);
824 ir_dereference
*const rhs_var_ref
=
825 new(ctx
) ir_dereference_variable(rhs_var
);
826 ir_instruction
*const inst
=
827 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
828 instructions
->push_tail(inst
);
830 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
831 var
->type
->vector_elements
);
832 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
833 var
->type
->matrix_columns
);
835 unsigned swiz
[4] = { 0, 0, 0, 0 };
836 for (unsigned i
= 1; i
< last_row
; i
++)
839 const unsigned write_mask
= (1U << last_row
) - 1;
841 for (unsigned i
= 0; i
< last_col
; i
++) {
842 ir_dereference
*const lhs
=
843 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
844 ir_rvalue
*const rhs_col
=
845 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
847 /* If one matrix has columns that are smaller than the columns of the
848 * other matrix, wrap the column access of the larger with a swizzle
849 * so that the LHS and RHS of the assignment have the same size (and
850 * therefore have the same type).
852 * It would be perfectly valid to unconditionally generate the
853 * swizzles, this this will typically result in a more compact IR tree.
856 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
857 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
862 ir_instruction
*inst
=
863 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
864 instructions
->push_tail(inst
);
867 const unsigned cols
= type
->matrix_columns
;
868 const unsigned rows
= type
->vector_elements
;
869 unsigned col_idx
= 0;
870 unsigned row_idx
= 0;
872 foreach_list (node
, parameters
) {
873 ir_rvalue
*const rhs
= (ir_rvalue
*) node
;
874 const unsigned components_remaining_this_column
= rows
- row_idx
;
875 unsigned rhs_components
= rhs
->type
->components();
876 unsigned rhs_base
= 0;
878 /* Since the parameter might be used in the RHS of two assignments,
879 * generate a temporary and copy the paramter there.
881 ir_variable
*rhs_var
=
882 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
883 instructions
->push_tail(rhs_var
);
885 ir_dereference
*rhs_var_ref
=
886 new(ctx
) ir_dereference_variable(rhs_var
);
887 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
888 instructions
->push_tail(inst
);
890 /* Assign the current parameter to as many components of the matrix
893 * NOTE: A single vector parameter can span two matrix columns. A
894 * single vec4, for example, can completely fill a mat2.
896 if (rhs_components
>= components_remaining_this_column
) {
897 const unsigned count
= MIN2(rhs_components
,
898 components_remaining_this_column
);
900 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
902 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
906 instructions
->push_tail(inst
);
914 /* If there is data left in the parameter and components left to be
915 * set in the destination, emit another assignment. It is possible
916 * that the assignment could be of a vec4 to the last element of the
917 * matrix. In this case col_idx==cols, but there is still data
918 * left in the source parameter. Obviously, don't emit an assignment
919 * to data outside the destination matrix.
921 if ((col_idx
< cols
) && (rhs_base
< rhs_components
)) {
922 const unsigned count
= rhs_components
- rhs_base
;
924 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
926 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
931 instructions
->push_tail(inst
);
938 return new(ctx
) ir_dereference_variable(var
);
943 emit_inline_record_constructor(const glsl_type
*type
,
944 exec_list
*instructions
,
945 exec_list
*parameters
,
948 ir_variable
*const var
=
949 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
950 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
952 instructions
->push_tail(var
);
954 exec_node
*node
= parameters
->head
;
955 for (unsigned i
= 0; i
< type
->length
; i
++) {
956 assert(!node
->is_tail_sentinel());
958 ir_dereference
*const lhs
=
959 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
960 type
->fields
.structure
[i
].name
);
962 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
965 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
967 instructions
->push_tail(assign
);
976 ast_function_expression::hir(exec_list
*instructions
,
977 struct _mesa_glsl_parse_state
*state
)
980 /* There are three sorts of function calls.
982 * 1. constructors - The first subexpression is an ast_type_specifier.
983 * 2. methods - Only the .length() method of array types.
984 * 3. functions - Calls to regular old functions.
986 * Method calls are actually detected when the ast_field_selection
987 * expression is handled.
989 if (is_constructor()) {
990 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
991 YYLTYPE loc
= type
->get_location();
994 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
997 /* Constructors for samplers are illegal.
999 if (constructor_type
->is_sampler()) {
1000 _mesa_glsl_error(& loc
, state
, "cannot construct sampler type `%s'",
1001 constructor_type
->name
);
1002 return ir_call::get_error_instruction(ctx
);
1005 if (constructor_type
->is_array()) {
1006 if (state
->language_version
<= 110) {
1007 _mesa_glsl_error(& loc
, state
,
1008 "array constructors forbidden in GLSL 1.10");
1009 return ir_call::get_error_instruction(ctx
);
1012 return process_array_constructor(instructions
, constructor_type
,
1013 & loc
, &this->expressions
, state
);
1017 /* There are two kinds of constructor call. Constructors for built-in
1018 * language types, such as mat4 and vec2, are free form. The only
1019 * requirement is that the parameters must provide enough values of the
1020 * correct scalar type. Constructors for arrays and structures must
1021 * have the exact number of parameters with matching types in the
1022 * correct order. These constructors follow essentially the same type
1023 * matching rules as functions.
1025 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1026 return ir_call::get_error_instruction(ctx
);
1028 /* Total number of components of the type being constructed. */
1029 const unsigned type_components
= constructor_type
->components();
1031 /* Number of components from parameters that have actually been
1032 * consumed. This is used to perform several kinds of error checking.
1034 unsigned components_used
= 0;
1036 unsigned matrix_parameters
= 0;
1037 unsigned nonmatrix_parameters
= 0;
1038 exec_list actual_parameters
;
1040 foreach_list (n
, &this->expressions
) {
1041 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1042 ir_rvalue
*result
= ast
->hir(instructions
, state
)->as_rvalue();
1044 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1046 * "It is an error to provide extra arguments beyond this
1047 * last used argument."
1049 if (components_used
>= type_components
) {
1050 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1052 constructor_type
->name
);
1053 return ir_call::get_error_instruction(ctx
);
1056 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1057 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1058 "non-numeric data type",
1059 constructor_type
->name
);
1060 return ir_call::get_error_instruction(ctx
);
1063 /* Count the number of matrix and nonmatrix parameters. This
1064 * is used below to enforce some of the constructor rules.
1066 if (result
->type
->is_matrix())
1067 matrix_parameters
++;
1069 nonmatrix_parameters
++;
1071 actual_parameters
.push_tail(result
);
1072 components_used
+= result
->type
->components();
1075 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1077 * "It is an error to construct matrices from other matrices. This
1078 * is reserved for future use."
1080 if (state
->language_version
== 110 && matrix_parameters
> 0
1081 && constructor_type
->is_matrix()) {
1082 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1083 "matrix in GLSL 1.10",
1084 constructor_type
->name
);
1085 return ir_call::get_error_instruction(ctx
);
1088 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1090 * "If a matrix argument is given to a matrix constructor, it is
1091 * an error to have any other arguments."
1093 if ((matrix_parameters
> 0)
1094 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1095 && constructor_type
->is_matrix()) {
1096 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1097 "matrix must be only parameter",
1098 constructor_type
->name
);
1099 return ir_call::get_error_instruction(ctx
);
1102 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1104 * "In these cases, there must be enough components provided in the
1105 * arguments to provide an initializer for every component in the
1106 * constructed value."
1108 if (components_used
< type_components
&& components_used
!= 1
1109 && matrix_parameters
== 0) {
1110 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1112 constructor_type
->name
);
1113 return ir_call::get_error_instruction(ctx
);
1116 /* Later, we cast each parameter to the same base type as the
1117 * constructor. Since there are no non-floating point matrices, we
1118 * need to break them up into a series of column vectors.
1120 if (constructor_type
->base_type
!= GLSL_TYPE_FLOAT
) {
1121 foreach_list_safe(n
, &actual_parameters
) {
1122 ir_rvalue
*matrix
= (ir_rvalue
*) n
;
1124 if (!matrix
->type
->is_matrix())
1127 /* Create a temporary containing the matrix. */
1128 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1130 instructions
->push_tail(var
);
1131 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1132 ir_dereference_variable(var
), matrix
, NULL
));
1133 var
->constant_value
= matrix
->constant_expression_value();
1135 /* Replace the matrix with dereferences of its columns. */
1136 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1137 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1138 new(ctx
) ir_constant(i
)));
1144 bool all_parameters_are_constant
= true;
1146 /* Type cast each parameter and, if possible, fold constants.*/
1147 foreach_list_safe(n
, &actual_parameters
) {
1148 ir_rvalue
*ir
= (ir_rvalue
*) n
;
1150 const glsl_type
*desired_type
=
1151 glsl_type::get_instance(constructor_type
->base_type
,
1152 ir
->type
->vector_elements
,
1153 ir
->type
->matrix_columns
);
1154 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1156 /* Attempt to convert the parameter to a constant valued expression.
1157 * After doing so, track whether or not all the parameters to the
1158 * constructor are trivially constant valued expressions.
1160 ir_rvalue
*const constant
= result
->constant_expression_value();
1162 if (constant
!= NULL
)
1165 all_parameters_are_constant
= false;
1168 ir
->replace_with(result
);
1172 /* If all of the parameters are trivially constant, create a
1173 * constant representing the complete collection of parameters.
1175 if (all_parameters_are_constant
) {
1176 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1177 } else if (constructor_type
->is_scalar()) {
1178 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1180 } else if (constructor_type
->is_vector()) {
1181 return emit_inline_vector_constructor(constructor_type
,
1186 assert(constructor_type
->is_matrix());
1187 return emit_inline_matrix_constructor(constructor_type
,
1193 const ast_expression
*id
= subexpressions
[0];
1194 YYLTYPE loc
= id
->get_location();
1195 exec_list actual_parameters
;
1197 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1200 const glsl_type
*const type
=
1201 state
->symbols
->get_type(id
->primary_expression
.identifier
);
1203 if ((type
!= NULL
) && type
->is_record()) {
1204 exec_node
*node
= actual_parameters
.head
;
1205 for (unsigned i
= 0; i
< type
->length
; i
++) {
1206 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1208 if (node
->is_tail_sentinel()) {
1209 _mesa_glsl_error(&loc
, state
,
1210 "insufficient parameters to constructor "
1213 return ir_call::get_error_instruction(ctx
);
1216 if (apply_implicit_conversion(type
->fields
.structure
[i
].type
, ir
,
1218 node
->replace_with(ir
);
1220 _mesa_glsl_error(&loc
, state
,
1221 "parameter type mismatch in constructor "
1222 "for `%s.%s' (%s vs %s)",
1224 type
->fields
.structure
[i
].name
,
1226 type
->fields
.structure
[i
].type
->name
);
1227 return ir_call::get_error_instruction(ctx
);;
1233 if (!node
->is_tail_sentinel()) {
1234 _mesa_glsl_error(&loc
, state
, "too many parameters in constructor "
1235 "for `%s'", type
->name
);
1236 return ir_call::get_error_instruction(ctx
);
1239 ir_rvalue
*const constant
=
1240 constant_record_constructor(type
, &actual_parameters
, state
);
1242 return (constant
!= NULL
)
1244 : emit_inline_record_constructor(type
, instructions
,
1245 &actual_parameters
, state
);
1248 return match_function_by_name(instructions
,
1249 id
->primary_expression
.identifier
, & loc
,
1250 &actual_parameters
, state
);
1253 return ir_call::get_error_instruction(ctx
);