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 ralloced 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
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
80 ralloc_asprintf_append(&str
, "%s(", name
);
82 const char *comma
= "";
83 foreach_list(node
, parameters
) {
84 const ir_instruction
*const param
= (ir_instruction
*) node
;
86 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
90 ralloc_strcat(&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.
111 && (f
== NULL
|| state
->es_shader
|| !f
->has_user_signature())
112 && state
->symbols
->get_type(name
) == NULL
113 && (state
->language_version
== 110
114 || state
->symbols
->get_variable(name
) == NULL
)) {
115 /* The current shader doesn't contain a matching function or signature.
116 * Before giving up, look for the prototype in the built-in functions.
118 for (unsigned i
= 0; i
< state
->num_builtins_to_link
; i
++) {
119 ir_function
*builtin
;
120 builtin
= state
->builtins_to_link
[i
]->symbols
->get_function(name
);
121 sig
= builtin
? builtin
->matching_signature(actual_parameters
) : NULL
;
124 f
= new(ctx
) ir_function(name
);
125 state
->symbols
->add_global_function(f
);
126 emit_function(state
, instructions
, f
);
129 f
->add_signature(sig
->clone_prototype(f
, NULL
));
136 /* Verify that 'out' and 'inout' actual parameters are lvalues. This
137 * isn't done in ir_function::matching_signature because that function
138 * cannot generate the necessary diagnostics.
140 * Also, validate that 'const_in' formal parameters (an extension of our
141 * IR) correspond to ir_constant actual parameters.
143 exec_list_iterator actual_iter
= actual_parameters
->iterator();
144 exec_list_iterator formal_iter
= sig
->parameters
.iterator();
146 while (actual_iter
.has_next()) {
147 ir_rvalue
*actual
= (ir_rvalue
*) actual_iter
.get();
148 ir_variable
*formal
= (ir_variable
*) formal_iter
.get();
150 assert(actual
!= NULL
);
151 assert(formal
!= NULL
);
153 if (formal
->mode
== ir_var_const_in
&& !actual
->as_constant()) {
154 _mesa_glsl_error(loc
, state
,
155 "parameter `%s' must be a constant expression",
159 if ((formal
->mode
== ir_var_out
)
160 || (formal
->mode
== ir_var_inout
)) {
161 const char *mode
= NULL
;
162 switch (formal
->mode
) {
163 case ir_var_out
: mode
= "out"; break;
164 case ir_var_inout
: mode
= "inout"; break;
165 default: assert(false); break;
167 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
170 if (actual
->variable_referenced()
171 && actual
->variable_referenced()->read_only
) {
172 _mesa_glsl_error(loc
, state
,
173 "function parameter '%s %s' references the "
174 "read-only variable '%s'",
176 actual
->variable_referenced()->name
);
178 } else if (!actual
->is_lvalue()) {
179 _mesa_glsl_error(loc
, state
,
180 "function parameter '%s %s' is not an lvalue",
185 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
186 ir_rvalue
*converted
= convert_component(actual
, formal
->type
);
187 actual
->replace_with(converted
);
194 /* Always insert the call in the instruction stream, and return a deref
195 * of its return val if it returns a value, since we don't know if
196 * the rvalue is going to be assigned to anything or not.
198 ir_call
*call
= new(ctx
) ir_call(sig
, actual_parameters
);
199 if (!sig
->return_type
->is_void()) {
201 ir_dereference_variable
*deref
;
203 var
= new(ctx
) ir_variable(sig
->return_type
,
204 ralloc_asprintf(ctx
, "%s_retval",
205 sig
->function_name()),
207 instructions
->push_tail(var
);
209 deref
= new(ctx
) ir_dereference_variable(var
);
210 ir_assignment
*assign
= new(ctx
) ir_assignment(deref
, call
, NULL
);
211 instructions
->push_tail(assign
);
212 if (state
->language_version
>= 120)
213 var
->constant_value
= call
->constant_expression_value();
215 deref
= new(ctx
) ir_dereference_variable(var
);
218 instructions
->push_tail(call
);
222 char *str
= prototype_string(NULL
, name
, actual_parameters
);
224 _mesa_glsl_error(loc
, state
, "no matching function for call to `%s'",
228 const char *prefix
= "candidates are: ";
230 for (int i
= -1; i
< (int) state
->num_builtins_to_link
; i
++) {
231 glsl_symbol_table
*syms
= i
>= 0 ? state
->builtins_to_link
[i
]->symbols
233 f
= syms
->get_function(name
);
237 foreach_list (node
, &f
->signatures
) {
238 ir_function_signature
*sig
= (ir_function_signature
*) node
;
240 str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
241 _mesa_glsl_error(loc
, state
, "%s%s", prefix
, str
);
249 return ir_call::get_error_instruction(ctx
);
255 * Perform automatic type conversion of constructor parameters
257 * This implements the rules in the "Conversion and Scalar Constructors"
258 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
261 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
263 void *ctx
= ralloc_parent(src
);
264 const unsigned a
= desired_type
->base_type
;
265 const unsigned b
= src
->type
->base_type
;
266 ir_expression
*result
= NULL
;
268 if (src
->type
->is_error())
271 assert(a
<= GLSL_TYPE_BOOL
);
272 assert(b
<= GLSL_TYPE_BOOL
);
274 if ((a
== b
) || (src
->type
->is_integer() && desired_type
->is_integer()))
280 if (b
== GLSL_TYPE_FLOAT
)
281 result
= new(ctx
) ir_expression(ir_unop_f2i
, desired_type
, src
, NULL
);
283 assert(b
== GLSL_TYPE_BOOL
);
284 result
= new(ctx
) ir_expression(ir_unop_b2i
, desired_type
, src
, NULL
);
287 case GLSL_TYPE_FLOAT
:
290 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
293 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
296 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
304 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
306 case GLSL_TYPE_FLOAT
:
307 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
313 assert(result
!= NULL
);
315 /* Try constant folding; it may fold in the conversion we just added. */
316 ir_constant
*const constant
= result
->constant_expression_value();
317 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
321 * Dereference a specific component from a scalar, vector, or matrix
324 dereference_component(ir_rvalue
*src
, unsigned component
)
326 void *ctx
= ralloc_parent(src
);
327 assert(component
< src
->type
->components());
329 /* If the source is a constant, just create a new constant instead of a
330 * dereference of the existing constant.
332 ir_constant
*constant
= src
->as_constant();
334 return new(ctx
) ir_constant(constant
, component
);
336 if (src
->type
->is_scalar()) {
338 } else if (src
->type
->is_vector()) {
339 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
341 assert(src
->type
->is_matrix());
343 /* Dereference a row of the matrix, then call this function again to get
344 * a specific element from that row.
346 const int c
= component
/ src
->type
->column_type()->vector_elements
;
347 const int r
= component
% src
->type
->column_type()->vector_elements
;
348 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
349 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
351 col
->type
= src
->type
->column_type();
353 return dereference_component(col
, r
);
356 assert(!"Should not get here.");
362 process_array_constructor(exec_list
*instructions
,
363 const glsl_type
*constructor_type
,
364 YYLTYPE
*loc
, exec_list
*parameters
,
365 struct _mesa_glsl_parse_state
*state
)
368 /* Array constructors come in two forms: sized and unsized. Sized array
369 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
370 * variables. In this case the number of parameters must exactly match the
371 * specified size of the array.
373 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
374 * are vec4 variables. In this case the size of the array being constructed
375 * is determined by the number of parameters.
377 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
379 * "There must be exactly the same number of arguments as the size of
380 * the array being constructed. If no size is present in the
381 * constructor, then the array is explicitly sized to the number of
382 * arguments provided. The arguments are assigned in order, starting at
383 * element 0, to the elements of the constructed array. Each argument
384 * must be the same type as the element type of the array, or be a type
385 * that can be converted to the element type of the array according to
386 * Section 4.1.10 "Implicit Conversions.""
388 exec_list actual_parameters
;
389 const unsigned parameter_count
=
390 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
392 if ((parameter_count
== 0)
393 || ((constructor_type
->length
!= 0)
394 && (constructor_type
->length
!= parameter_count
))) {
395 const unsigned min_param
= (constructor_type
->length
== 0)
396 ? 1 : constructor_type
->length
;
398 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
400 (constructor_type
->length
!= 0) ? "at least" : "exactly",
401 min_param
, (min_param
<= 1) ? "" : "s");
402 return ir_call::get_error_instruction(ctx
);
405 if (constructor_type
->length
== 0) {
407 glsl_type::get_array_instance(constructor_type
->element_type(),
409 assert(constructor_type
!= NULL
);
410 assert(constructor_type
->length
== parameter_count
);
413 bool all_parameters_are_constant
= true;
415 /* Type cast each parameter and, if possible, fold constants. */
416 foreach_list_safe(n
, &actual_parameters
) {
417 ir_rvalue
*ir
= (ir_rvalue
*) n
;
418 ir_rvalue
*result
= ir
;
420 /* Apply implicit conversions (not the scalar constructor rules!) */
421 if (constructor_type
->element_type()->is_float()) {
422 const glsl_type
*desired_type
=
423 glsl_type::get_instance(GLSL_TYPE_FLOAT
,
424 ir
->type
->vector_elements
,
425 ir
->type
->matrix_columns
);
426 result
= convert_component(ir
, desired_type
);
429 if (result
->type
!= constructor_type
->element_type()) {
430 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
431 "expected: %s, found %s",
432 constructor_type
->element_type()->name
,
436 /* Attempt to convert the parameter to a constant valued expression.
437 * After doing so, track whether or not all the parameters to the
438 * constructor are trivially constant valued expressions.
440 ir_rvalue
*const constant
= result
->constant_expression_value();
442 if (constant
!= NULL
)
445 all_parameters_are_constant
= false;
447 ir
->replace_with(result
);
450 if (all_parameters_are_constant
)
451 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
453 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
455 instructions
->push_tail(var
);
458 foreach_list(node
, &actual_parameters
) {
459 ir_rvalue
*rhs
= (ir_rvalue
*) node
;
460 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
461 new(ctx
) ir_constant(i
));
463 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
464 instructions
->push_tail(assignment
);
469 return new(ctx
) ir_dereference_variable(var
);
474 * Try to convert a record constructor to a constant expression
477 constant_record_constructor(const glsl_type
*constructor_type
,
478 exec_list
*parameters
, void *mem_ctx
)
480 foreach_list(node
, parameters
) {
481 ir_constant
*constant
= ((ir_instruction
*) node
)->as_constant();
482 if (constant
== NULL
)
484 node
->replace_with(constant
);
487 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
492 * Determine if a list consists of a single scalar r-value
495 single_scalar_parameter(exec_list
*parameters
)
497 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
498 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
500 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
505 * Generate inline code for a vector constructor
507 * The generated constructor code will consist of a temporary variable
508 * declaration of the same type as the constructor. A sequence of assignments
509 * from constructor parameters to the temporary will follow.
512 * An \c ir_dereference_variable of the temprorary generated in the constructor
516 emit_inline_vector_constructor(const glsl_type
*type
,
517 exec_list
*instructions
,
518 exec_list
*parameters
,
521 assert(!parameters
->is_empty());
523 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
524 instructions
->push_tail(var
);
526 /* There are two kinds of vector constructors.
528 * - Construct a vector from a single scalar by replicating that scalar to
529 * all components of the vector.
531 * - Construct a vector from an arbirary combination of vectors and
532 * scalars. The components of the constructor parameters are assigned
533 * to the vector in order until the vector is full.
535 const unsigned lhs_components
= type
->components();
536 if (single_scalar_parameter(parameters
)) {
537 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
538 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
540 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
541 const unsigned mask
= (1U << lhs_components
) - 1;
543 assert(rhs
->type
== lhs
->type
);
545 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
546 instructions
->push_tail(inst
);
548 unsigned base_component
= 0;
549 unsigned base_lhs_component
= 0;
550 ir_constant_data data
;
551 unsigned constant_mask
= 0, constant_components
= 0;
553 memset(&data
, 0, sizeof(data
));
555 foreach_list(node
, parameters
) {
556 ir_rvalue
*param
= (ir_rvalue
*) node
;
557 unsigned rhs_components
= param
->type
->components();
559 /* Do not try to assign more components to the vector than it has!
561 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
562 rhs_components
= lhs_components
- base_lhs_component
;
565 const ir_constant
*const c
= param
->as_constant();
567 for (unsigned i
= 0; i
< rhs_components
; i
++) {
568 switch (c
->type
->base_type
) {
570 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
573 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
575 case GLSL_TYPE_FLOAT
:
576 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
579 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
582 assert(!"Should not get here.");
587 /* Mask of fields to be written in the assignment.
589 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
590 constant_components
+= rhs_components
;
592 base_component
+= rhs_components
;
594 /* Advance the component index by the number of components
595 * that were just assigned.
597 base_lhs_component
+= rhs_components
;
600 if (constant_mask
!= 0) {
601 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
602 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
605 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
607 ir_instruction
*inst
=
608 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
609 instructions
->push_tail(inst
);
613 foreach_list(node
, parameters
) {
614 ir_rvalue
*param
= (ir_rvalue
*) node
;
615 unsigned rhs_components
= param
->type
->components();
617 /* Do not try to assign more components to the vector than it has!
619 if ((rhs_components
+ base_component
) > lhs_components
) {
620 rhs_components
= lhs_components
- base_component
;
623 const ir_constant
*const c
= param
->as_constant();
625 /* Mask of fields to be written in the assignment.
627 const unsigned write_mask
= ((1U << rhs_components
) - 1)
630 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
632 /* Generate a swizzle so that LHS and RHS sizes match.
635 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
637 ir_instruction
*inst
=
638 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
639 instructions
->push_tail(inst
);
642 /* Advance the component index by the number of components that were
645 base_component
+= rhs_components
;
648 return new(ctx
) ir_dereference_variable(var
);
653 * Generate assignment of a portion of a vector to a portion of a matrix column
655 * \param src_base First component of the source to be used in assignment
656 * \param column Column of destination to be assiged
657 * \param row_base First component of the destination column to be assigned
658 * \param count Number of components to be assigned
661 * \c src_base + \c count must be less than or equal to the number of components
662 * in the source vector.
665 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
666 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
669 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
670 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
672 assert(column_ref
->type
->components() >= (row_base
+ count
));
673 assert(src
->type
->components() >= (src_base
+ count
));
675 /* Generate a swizzle that extracts the number of components from the source
676 * that are to be assigned to the column of the matrix.
678 if (count
< src
->type
->vector_elements
) {
679 src
= new(mem_ctx
) ir_swizzle(src
,
680 src_base
+ 0, src_base
+ 1,
681 src_base
+ 2, src_base
+ 3,
685 /* Mask of fields to be written in the assignment.
687 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
689 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
694 * Generate inline code for a matrix constructor
696 * The generated constructor code will consist of a temporary variable
697 * declaration of the same type as the constructor. A sequence of assignments
698 * from constructor parameters to the temporary will follow.
701 * An \c ir_dereference_variable of the temprorary generated in the constructor
705 emit_inline_matrix_constructor(const glsl_type
*type
,
706 exec_list
*instructions
,
707 exec_list
*parameters
,
710 assert(!parameters
->is_empty());
712 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
713 instructions
->push_tail(var
);
715 /* There are three kinds of matrix constructors.
717 * - Construct a matrix from a single scalar by replicating that scalar to
718 * along the diagonal of the matrix and setting all other components to
721 * - Construct a matrix from an arbirary combination of vectors and
722 * scalars. The components of the constructor parameters are assigned
723 * to the matrix in colum-major order until the matrix is full.
725 * - Construct a matrix from a single matrix. The source matrix is copied
726 * to the upper left portion of the constructed matrix, and the remaining
727 * elements take values from the identity matrix.
729 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
730 if (single_scalar_parameter(parameters
)) {
731 /* Assign the scalar to the X component of a vec4, and fill the remaining
732 * components with zero.
734 ir_variable
*rhs_var
=
735 new(ctx
) ir_variable(glsl_type::vec4_type
, "mat_ctor_vec",
737 instructions
->push_tail(rhs_var
);
739 ir_constant_data zero
;
745 ir_instruction
*inst
=
746 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
747 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
749 instructions
->push_tail(inst
);
751 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
753 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
754 instructions
->push_tail(inst
);
756 /* Assign the temporary vector to each column of the destination matrix
757 * with a swizzle that puts the X component on the diagonal of the
758 * matrix. In some cases this may mean that the X component does not
759 * get assigned into the column at all (i.e., when the matrix has more
760 * columns than rows).
762 static const unsigned rhs_swiz
[4][4] = {
769 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
770 type
->vector_elements
);
771 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
772 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
773 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
775 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
776 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
777 type
->vector_elements
);
779 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
780 instructions
->push_tail(inst
);
783 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
784 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
785 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
787 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
788 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
789 type
->vector_elements
);
791 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
792 instructions
->push_tail(inst
);
794 } else if (first_param
->type
->is_matrix()) {
795 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
797 * "If a matrix is constructed from a matrix, then each component
798 * (column i, row j) in the result that has a corresponding
799 * component (column i, row j) in the argument will be initialized
800 * from there. All other components will be initialized to the
801 * identity matrix. If a matrix argument is given to a matrix
802 * constructor, it is an error to have any other arguments."
804 assert(first_param
->next
->is_tail_sentinel());
805 ir_rvalue
*const src_matrix
= first_param
;
807 /* If the source matrix is smaller, pre-initialize the relavent parts of
808 * the destination matrix to the identity matrix.
810 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
811 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
813 /* If the source matrix has fewer rows, every column of the destination
814 * must be initialized. Otherwise only the columns in the destination
815 * that do not exist in the source must be initialized.
818 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
819 ? 0 : src_matrix
->type
->matrix_columns
;
821 const glsl_type
*const col_type
= var
->type
->column_type();
822 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
823 ir_constant_data ident
;
832 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
834 ir_rvalue
*const lhs
=
835 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
837 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
838 instructions
->push_tail(inst
);
842 /* Assign columns from the source matrix to the destination matrix.
844 * Since the parameter will be used in the RHS of multiple assignments,
845 * generate a temporary and copy the paramter there.
847 ir_variable
*const rhs_var
=
848 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
850 instructions
->push_tail(rhs_var
);
852 ir_dereference
*const rhs_var_ref
=
853 new(ctx
) ir_dereference_variable(rhs_var
);
854 ir_instruction
*const inst
=
855 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
856 instructions
->push_tail(inst
);
858 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
859 var
->type
->vector_elements
);
860 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
861 var
->type
->matrix_columns
);
863 unsigned swiz
[4] = { 0, 0, 0, 0 };
864 for (unsigned i
= 1; i
< last_row
; i
++)
867 const unsigned write_mask
= (1U << last_row
) - 1;
869 for (unsigned i
= 0; i
< last_col
; i
++) {
870 ir_dereference
*const lhs
=
871 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
872 ir_rvalue
*const rhs_col
=
873 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
875 /* If one matrix has columns that are smaller than the columns of the
876 * other matrix, wrap the column access of the larger with a swizzle
877 * so that the LHS and RHS of the assignment have the same size (and
878 * therefore have the same type).
880 * It would be perfectly valid to unconditionally generate the
881 * swizzles, this this will typically result in a more compact IR tree.
884 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
885 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
890 ir_instruction
*inst
=
891 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
892 instructions
->push_tail(inst
);
895 const unsigned cols
= type
->matrix_columns
;
896 const unsigned rows
= type
->vector_elements
;
897 unsigned col_idx
= 0;
898 unsigned row_idx
= 0;
900 foreach_list (node
, parameters
) {
901 ir_rvalue
*const rhs
= (ir_rvalue
*) node
;
902 const unsigned components_remaining_this_column
= rows
- row_idx
;
903 unsigned rhs_components
= rhs
->type
->components();
904 unsigned rhs_base
= 0;
906 /* Since the parameter might be used in the RHS of two assignments,
907 * generate a temporary and copy the paramter there.
909 ir_variable
*rhs_var
=
910 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
911 instructions
->push_tail(rhs_var
);
913 ir_dereference
*rhs_var_ref
=
914 new(ctx
) ir_dereference_variable(rhs_var
);
915 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
916 instructions
->push_tail(inst
);
918 /* Assign the current parameter to as many components of the matrix
921 * NOTE: A single vector parameter can span two matrix columns. A
922 * single vec4, for example, can completely fill a mat2.
924 if (rhs_components
>= components_remaining_this_column
) {
925 const unsigned count
= MIN2(rhs_components
,
926 components_remaining_this_column
);
928 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
930 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
934 instructions
->push_tail(inst
);
942 /* If there is data left in the parameter and components left to be
943 * set in the destination, emit another assignment. It is possible
944 * that the assignment could be of a vec4 to the last element of the
945 * matrix. In this case col_idx==cols, but there is still data
946 * left in the source parameter. Obviously, don't emit an assignment
947 * to data outside the destination matrix.
949 if ((col_idx
< cols
) && (rhs_base
< rhs_components
)) {
950 const unsigned count
= rhs_components
- rhs_base
;
952 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
954 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
959 instructions
->push_tail(inst
);
966 return new(ctx
) ir_dereference_variable(var
);
971 emit_inline_record_constructor(const glsl_type
*type
,
972 exec_list
*instructions
,
973 exec_list
*parameters
,
976 ir_variable
*const var
=
977 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
978 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
980 instructions
->push_tail(var
);
982 exec_node
*node
= parameters
->head
;
983 for (unsigned i
= 0; i
< type
->length
; i
++) {
984 assert(!node
->is_tail_sentinel());
986 ir_dereference
*const lhs
=
987 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
988 type
->fields
.structure
[i
].name
);
990 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
993 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
995 instructions
->push_tail(assign
);
1004 ast_function_expression::hir(exec_list
*instructions
,
1005 struct _mesa_glsl_parse_state
*state
)
1008 /* There are three sorts of function calls.
1010 * 1. constructors - The first subexpression is an ast_type_specifier.
1011 * 2. methods - Only the .length() method of array types.
1012 * 3. functions - Calls to regular old functions.
1014 * Method calls are actually detected when the ast_field_selection
1015 * expression is handled.
1017 if (is_constructor()) {
1018 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1019 YYLTYPE loc
= type
->get_location();
1022 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1024 /* constructor_type can be NULL if a variable with the same name as the
1025 * structure has come into scope.
1027 if (constructor_type
== NULL
) {
1028 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1029 "may be shadowed by a variable with the same name)",
1031 return ir_call::get_error_instruction(ctx
);
1035 /* Constructors for samplers are illegal.
1037 if (constructor_type
->is_sampler()) {
1038 _mesa_glsl_error(& loc
, state
, "cannot construct sampler type `%s'",
1039 constructor_type
->name
);
1040 return ir_call::get_error_instruction(ctx
);
1043 if (constructor_type
->is_array()) {
1044 if (state
->language_version
<= 110) {
1045 _mesa_glsl_error(& loc
, state
,
1046 "array constructors forbidden in GLSL 1.10");
1047 return ir_call::get_error_instruction(ctx
);
1050 return process_array_constructor(instructions
, constructor_type
,
1051 & loc
, &this->expressions
, state
);
1055 /* There are two kinds of constructor call. Constructors for built-in
1056 * language types, such as mat4 and vec2, are free form. The only
1057 * requirement is that the parameters must provide enough values of the
1058 * correct scalar type. Constructors for arrays and structures must
1059 * have the exact number of parameters with matching types in the
1060 * correct order. These constructors follow essentially the same type
1061 * matching rules as functions.
1063 if (constructor_type
->is_record()) {
1064 exec_list actual_parameters
;
1066 process_parameters(instructions
, &actual_parameters
,
1067 &this->expressions
, state
);
1069 exec_node
*node
= actual_parameters
.head
;
1070 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1071 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1073 if (node
->is_tail_sentinel()) {
1074 _mesa_glsl_error(&loc
, state
,
1075 "insufficient parameters to constructor "
1077 constructor_type
->name
);
1078 return ir_call::get_error_instruction(ctx
);
1081 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1083 node
->replace_with(ir
);
1085 _mesa_glsl_error(&loc
, state
,
1086 "parameter type mismatch in constructor "
1087 "for `%s.%s' (%s vs %s)",
1088 constructor_type
->name
,
1089 constructor_type
->fields
.structure
[i
].name
,
1091 constructor_type
->fields
.structure
[i
].type
->name
);
1092 return ir_call::get_error_instruction(ctx
);;
1098 if (!node
->is_tail_sentinel()) {
1099 _mesa_glsl_error(&loc
, state
, "too many parameters in constructor "
1100 "for `%s'", constructor_type
->name
);
1101 return ir_call::get_error_instruction(ctx
);
1104 ir_rvalue
*const constant
=
1105 constant_record_constructor(constructor_type
, &actual_parameters
,
1108 return (constant
!= NULL
)
1110 : emit_inline_record_constructor(constructor_type
, instructions
,
1111 &actual_parameters
, state
);
1114 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1115 return ir_call::get_error_instruction(ctx
);
1117 /* Total number of components of the type being constructed. */
1118 const unsigned type_components
= constructor_type
->components();
1120 /* Number of components from parameters that have actually been
1121 * consumed. This is used to perform several kinds of error checking.
1123 unsigned components_used
= 0;
1125 unsigned matrix_parameters
= 0;
1126 unsigned nonmatrix_parameters
= 0;
1127 exec_list actual_parameters
;
1129 foreach_list (n
, &this->expressions
) {
1130 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1131 ir_rvalue
*result
= ast
->hir(instructions
, state
)->as_rvalue();
1133 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1135 * "It is an error to provide extra arguments beyond this
1136 * last used argument."
1138 if (components_used
>= type_components
) {
1139 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1141 constructor_type
->name
);
1142 return ir_call::get_error_instruction(ctx
);
1145 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1146 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1147 "non-numeric data type",
1148 constructor_type
->name
);
1149 return ir_call::get_error_instruction(ctx
);
1152 /* Count the number of matrix and nonmatrix parameters. This
1153 * is used below to enforce some of the constructor rules.
1155 if (result
->type
->is_matrix())
1156 matrix_parameters
++;
1158 nonmatrix_parameters
++;
1160 actual_parameters
.push_tail(result
);
1161 components_used
+= result
->type
->components();
1164 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1166 * "It is an error to construct matrices from other matrices. This
1167 * is reserved for future use."
1169 if (state
->language_version
== 110 && matrix_parameters
> 0
1170 && constructor_type
->is_matrix()) {
1171 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1172 "matrix in GLSL 1.10",
1173 constructor_type
->name
);
1174 return ir_call::get_error_instruction(ctx
);
1177 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1179 * "If a matrix argument is given to a matrix constructor, it is
1180 * an error to have any other arguments."
1182 if ((matrix_parameters
> 0)
1183 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1184 && constructor_type
->is_matrix()) {
1185 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1186 "matrix must be only parameter",
1187 constructor_type
->name
);
1188 return ir_call::get_error_instruction(ctx
);
1191 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1193 * "In these cases, there must be enough components provided in the
1194 * arguments to provide an initializer for every component in the
1195 * constructed value."
1197 if (components_used
< type_components
&& components_used
!= 1
1198 && matrix_parameters
== 0) {
1199 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1201 constructor_type
->name
);
1202 return ir_call::get_error_instruction(ctx
);
1205 /* Later, we cast each parameter to the same base type as the
1206 * constructor. Since there are no non-floating point matrices, we
1207 * need to break them up into a series of column vectors.
1209 if (constructor_type
->base_type
!= GLSL_TYPE_FLOAT
) {
1210 foreach_list_safe(n
, &actual_parameters
) {
1211 ir_rvalue
*matrix
= (ir_rvalue
*) n
;
1213 if (!matrix
->type
->is_matrix())
1216 /* Create a temporary containing the matrix. */
1217 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1219 instructions
->push_tail(var
);
1220 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1221 ir_dereference_variable(var
), matrix
, NULL
));
1222 var
->constant_value
= matrix
->constant_expression_value();
1224 /* Replace the matrix with dereferences of its columns. */
1225 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1226 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1227 new(ctx
) ir_constant(i
)));
1233 bool all_parameters_are_constant
= true;
1235 /* Type cast each parameter and, if possible, fold constants.*/
1236 foreach_list_safe(n
, &actual_parameters
) {
1237 ir_rvalue
*ir
= (ir_rvalue
*) n
;
1239 const glsl_type
*desired_type
=
1240 glsl_type::get_instance(constructor_type
->base_type
,
1241 ir
->type
->vector_elements
,
1242 ir
->type
->matrix_columns
);
1243 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1245 /* Attempt to convert the parameter to a constant valued expression.
1246 * After doing so, track whether or not all the parameters to the
1247 * constructor are trivially constant valued expressions.
1249 ir_rvalue
*const constant
= result
->constant_expression_value();
1251 if (constant
!= NULL
)
1254 all_parameters_are_constant
= false;
1257 ir
->replace_with(result
);
1261 /* If all of the parameters are trivially constant, create a
1262 * constant representing the complete collection of parameters.
1264 if (all_parameters_are_constant
) {
1265 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1266 } else if (constructor_type
->is_scalar()) {
1267 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1269 } else if (constructor_type
->is_vector()) {
1270 return emit_inline_vector_constructor(constructor_type
,
1275 assert(constructor_type
->is_matrix());
1276 return emit_inline_matrix_constructor(constructor_type
,
1282 const ast_expression
*id
= subexpressions
[0];
1283 YYLTYPE loc
= id
->get_location();
1284 exec_list actual_parameters
;
1286 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1289 return match_function_by_name(instructions
,
1290 id
->primary_expression
.identifier
, & loc
,
1291 &actual_parameters
, state
);
1294 return ir_call::get_error_instruction(ctx
);