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 ralloc_asprintf(&str
, "%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.
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 const char *mode
= NULL
;
149 switch (formal
->mode
) {
150 case ir_var_out
: mode
= "out"; break;
151 case ir_var_inout
: mode
= "inout"; break;
152 default: assert(false); break;
154 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
157 if (actual
->variable_referenced()
158 && actual
->variable_referenced()->read_only
) {
159 _mesa_glsl_error(loc
, state
,
160 "function parameter '%s %s' references the "
161 "read-only variable '%s'",
163 actual
->variable_referenced()->name
);
165 } else if (!actual
->is_lvalue()) {
166 _mesa_glsl_error(loc
, state
,
167 "function parameter '%s %s' is not an lvalue",
172 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
173 ir_rvalue
*converted
= convert_component(actual
, formal
->type
);
174 actual
->replace_with(converted
);
181 /* Always insert the call in the instruction stream, and return a deref
182 * of its return val if it returns a value, since we don't know if
183 * the rvalue is going to be assigned to anything or not.
185 ir_call
*call
= new(ctx
) ir_call(sig
, actual_parameters
);
186 if (!sig
->return_type
->is_void()) {
188 ir_dereference_variable
*deref
;
190 var
= new(ctx
) ir_variable(sig
->return_type
,
191 ralloc_asprintf(ctx
, "%s_retval",
192 sig
->function_name()),
194 instructions
->push_tail(var
);
196 deref
= new(ctx
) ir_dereference_variable(var
);
197 ir_assignment
*assign
= new(ctx
) ir_assignment(deref
, call
, NULL
);
198 instructions
->push_tail(assign
);
199 if (state
->language_version
>= 120)
200 var
->constant_value
= call
->constant_expression_value();
202 deref
= new(ctx
) ir_dereference_variable(var
);
205 instructions
->push_tail(call
);
209 char *str
= prototype_string(NULL
, name
, actual_parameters
);
211 _mesa_glsl_error(loc
, state
, "no matching function for call to `%s'",
215 const char *prefix
= "candidates are: ";
217 for (int i
= -1; i
< state
->num_builtins_to_link
; i
++) {
218 glsl_symbol_table
*syms
= i
>= 0 ? state
->builtins_to_link
[i
]->symbols
220 f
= syms
->get_function(name
);
224 foreach_list (node
, &f
->signatures
) {
225 ir_function_signature
*sig
= (ir_function_signature
*) node
;
227 str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
228 _mesa_glsl_error(loc
, state
, "%s%s\n", prefix
, str
);
236 return ir_call::get_error_instruction(ctx
);
242 * Perform automatic type conversion of constructor parameters
244 * This implements the rules in the "Conversion and Scalar Constructors"
245 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
248 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
250 void *ctx
= ralloc_parent(src
);
251 const unsigned a
= desired_type
->base_type
;
252 const unsigned b
= src
->type
->base_type
;
253 ir_expression
*result
= NULL
;
255 if (src
->type
->is_error())
258 assert(a
<= GLSL_TYPE_BOOL
);
259 assert(b
<= GLSL_TYPE_BOOL
);
261 if ((a
== b
) || (src
->type
->is_integer() && desired_type
->is_integer()))
267 if (b
== GLSL_TYPE_FLOAT
)
268 result
= new(ctx
) ir_expression(ir_unop_f2i
, desired_type
, src
, NULL
);
270 assert(b
== GLSL_TYPE_BOOL
);
271 result
= new(ctx
) ir_expression(ir_unop_b2i
, desired_type
, src
, NULL
);
274 case GLSL_TYPE_FLOAT
:
277 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
280 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
283 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
291 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
293 case GLSL_TYPE_FLOAT
:
294 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
300 assert(result
!= NULL
);
302 /* Try constant folding; it may fold in the conversion we just added. */
303 ir_constant
*const constant
= result
->constant_expression_value();
304 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
308 * Dereference a specific component from a scalar, vector, or matrix
311 dereference_component(ir_rvalue
*src
, unsigned component
)
313 void *ctx
= ralloc_parent(src
);
314 assert(component
< src
->type
->components());
316 /* If the source is a constant, just create a new constant instead of a
317 * dereference of the existing constant.
319 ir_constant
*constant
= src
->as_constant();
321 return new(ctx
) ir_constant(constant
, component
);
323 if (src
->type
->is_scalar()) {
325 } else if (src
->type
->is_vector()) {
326 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
328 assert(src
->type
->is_matrix());
330 /* Dereference a row of the matrix, then call this function again to get
331 * a specific element from that row.
333 const int c
= component
/ src
->type
->column_type()->vector_elements
;
334 const int r
= component
% src
->type
->column_type()->vector_elements
;
335 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
336 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
338 col
->type
= src
->type
->column_type();
340 return dereference_component(col
, r
);
343 assert(!"Should not get here.");
349 process_array_constructor(exec_list
*instructions
,
350 const glsl_type
*constructor_type
,
351 YYLTYPE
*loc
, exec_list
*parameters
,
352 struct _mesa_glsl_parse_state
*state
)
355 /* Array constructors come in two forms: sized and unsized. Sized array
356 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
357 * variables. In this case the number of parameters must exactly match the
358 * specified size of the array.
360 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
361 * are vec4 variables. In this case the size of the array being constructed
362 * is determined by the number of parameters.
364 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
366 * "There must be exactly the same number of arguments as the size of
367 * the array being constructed. If no size is present in the
368 * constructor, then the array is explicitly sized to the number of
369 * arguments provided. The arguments are assigned in order, starting at
370 * element 0, to the elements of the constructed array. Each argument
371 * must be the same type as the element type of the array, or be a type
372 * that can be converted to the element type of the array according to
373 * Section 4.1.10 "Implicit Conversions.""
375 exec_list actual_parameters
;
376 const unsigned parameter_count
=
377 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
379 if ((parameter_count
== 0)
380 || ((constructor_type
->length
!= 0)
381 && (constructor_type
->length
!= parameter_count
))) {
382 const unsigned min_param
= (constructor_type
->length
== 0)
383 ? 1 : constructor_type
->length
;
385 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
387 (constructor_type
->length
!= 0) ? "at least" : "exactly",
388 min_param
, (min_param
<= 1) ? "" : "s");
389 return ir_call::get_error_instruction(ctx
);
392 if (constructor_type
->length
== 0) {
394 glsl_type::get_array_instance(constructor_type
->element_type(),
396 assert(constructor_type
!= NULL
);
397 assert(constructor_type
->length
== parameter_count
);
400 bool all_parameters_are_constant
= true;
402 /* Type cast each parameter and, if possible, fold constants. */
403 foreach_list_safe(n
, &actual_parameters
) {
404 ir_rvalue
*ir
= (ir_rvalue
*) n
;
405 ir_rvalue
*result
= ir
;
407 /* Apply implicit conversions (not the scalar constructor rules!) */
408 if (constructor_type
->element_type()->is_float()) {
409 const glsl_type
*desired_type
=
410 glsl_type::get_instance(GLSL_TYPE_FLOAT
,
411 ir
->type
->vector_elements
,
412 ir
->type
->matrix_columns
);
413 result
= convert_component(ir
, desired_type
);
416 if (result
->type
!= constructor_type
->element_type()) {
417 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
418 "expected: %s, found %s",
419 constructor_type
->element_type()->name
,
423 /* Attempt to convert the parameter to a constant valued expression.
424 * After doing so, track whether or not all the parameters to the
425 * constructor are trivially constant valued expressions.
427 ir_rvalue
*const constant
= result
->constant_expression_value();
429 if (constant
!= NULL
)
432 all_parameters_are_constant
= false;
434 ir
->replace_with(result
);
437 if (all_parameters_are_constant
)
438 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
440 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
442 instructions
->push_tail(var
);
445 foreach_list(node
, &actual_parameters
) {
446 ir_rvalue
*rhs
= (ir_rvalue
*) node
;
447 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
448 new(ctx
) ir_constant(i
));
450 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
451 instructions
->push_tail(assignment
);
456 return new(ctx
) ir_dereference_variable(var
);
461 * Try to convert a record constructor to a constant expression
464 constant_record_constructor(const glsl_type
*constructor_type
,
465 exec_list
*parameters
, void *mem_ctx
)
467 foreach_list(node
, parameters
) {
468 ir_constant
*constant
= ((ir_instruction
*) node
)->as_constant();
469 if (constant
== NULL
)
471 node
->replace_with(constant
);
474 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
479 * Determine if a list consists of a single scalar r-value
482 single_scalar_parameter(exec_list
*parameters
)
484 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
485 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
487 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
492 * Generate inline code for a vector constructor
494 * The generated constructor code will consist of a temporary variable
495 * declaration of the same type as the constructor. A sequence of assignments
496 * from constructor parameters to the temporary will follow.
499 * An \c ir_dereference_variable of the temprorary generated in the constructor
503 emit_inline_vector_constructor(const glsl_type
*type
,
504 exec_list
*instructions
,
505 exec_list
*parameters
,
508 assert(!parameters
->is_empty());
510 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
511 instructions
->push_tail(var
);
513 /* There are two kinds of vector constructors.
515 * - Construct a vector from a single scalar by replicating that scalar to
516 * all components of the vector.
518 * - Construct a vector from an arbirary combination of vectors and
519 * scalars. The components of the constructor parameters are assigned
520 * to the vector in order until the vector is full.
522 const unsigned lhs_components
= type
->components();
523 if (single_scalar_parameter(parameters
)) {
524 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
525 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
527 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
528 const unsigned mask
= (1U << lhs_components
) - 1;
530 assert(rhs
->type
== lhs
->type
);
532 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
533 instructions
->push_tail(inst
);
535 unsigned base_component
= 0;
536 unsigned base_lhs_component
= 0;
537 ir_constant_data data
;
538 unsigned constant_mask
= 0, constant_components
= 0;
540 memset(&data
, 0, sizeof(data
));
542 foreach_list(node
, parameters
) {
543 ir_rvalue
*param
= (ir_rvalue
*) node
;
544 unsigned rhs_components
= param
->type
->components();
546 /* Do not try to assign more components to the vector than it has!
548 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
549 rhs_components
= lhs_components
- base_lhs_component
;
552 const ir_constant
*const c
= param
->as_constant();
554 for (unsigned i
= 0; i
< rhs_components
; i
++) {
555 switch (c
->type
->base_type
) {
557 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
560 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
562 case GLSL_TYPE_FLOAT
:
563 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
566 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
569 assert(!"Should not get here.");
574 /* Mask of fields to be written in the assignment.
576 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
577 constant_components
+= rhs_components
;
579 base_component
+= rhs_components
;
581 /* Advance the component index by the number of components
582 * that were just assigned.
584 base_lhs_component
+= rhs_components
;
587 if (constant_mask
!= 0) {
588 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
589 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
592 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
594 ir_instruction
*inst
=
595 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
596 instructions
->push_tail(inst
);
600 foreach_list(node
, parameters
) {
601 ir_rvalue
*param
= (ir_rvalue
*) node
;
602 unsigned rhs_components
= param
->type
->components();
604 /* Do not try to assign more components to the vector than it has!
606 if ((rhs_components
+ base_component
) > lhs_components
) {
607 rhs_components
= lhs_components
- base_component
;
610 const ir_constant
*const c
= param
->as_constant();
612 /* Mask of fields to be written in the assignment.
614 const unsigned write_mask
= ((1U << rhs_components
) - 1)
617 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
619 /* Generate a swizzle so that LHS and RHS sizes match.
622 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
624 ir_instruction
*inst
=
625 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
626 instructions
->push_tail(inst
);
629 /* Advance the component index by the number of components that were
632 base_component
+= rhs_components
;
635 return new(ctx
) ir_dereference_variable(var
);
640 * Generate assignment of a portion of a vector to a portion of a matrix column
642 * \param src_base First component of the source to be used in assignment
643 * \param column Column of destination to be assiged
644 * \param row_base First component of the destination column to be assigned
645 * \param count Number of components to be assigned
648 * \c src_base + \c count must be less than or equal to the number of components
649 * in the source vector.
652 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
653 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
656 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
657 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
659 assert(column_ref
->type
->components() >= (row_base
+ count
));
660 assert(src
->type
->components() >= (src_base
+ count
));
662 /* Generate a swizzle that extracts the number of components from the source
663 * that are to be assigned to the column of the matrix.
665 if (count
< src
->type
->vector_elements
) {
666 src
= new(mem_ctx
) ir_swizzle(src
,
667 src_base
+ 0, src_base
+ 1,
668 src_base
+ 2, src_base
+ 3,
672 /* Mask of fields to be written in the assignment.
674 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
676 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
681 * Generate inline code for a matrix constructor
683 * The generated constructor code will consist of a temporary variable
684 * declaration of the same type as the constructor. A sequence of assignments
685 * from constructor parameters to the temporary will follow.
688 * An \c ir_dereference_variable of the temprorary generated in the constructor
692 emit_inline_matrix_constructor(const glsl_type
*type
,
693 exec_list
*instructions
,
694 exec_list
*parameters
,
697 assert(!parameters
->is_empty());
699 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
700 instructions
->push_tail(var
);
702 /* There are three kinds of matrix constructors.
704 * - Construct a matrix from a single scalar by replicating that scalar to
705 * along the diagonal of the matrix and setting all other components to
708 * - Construct a matrix from an arbirary combination of vectors and
709 * scalars. The components of the constructor parameters are assigned
710 * to the matrix in colum-major order until the matrix is full.
712 * - Construct a matrix from a single matrix. The source matrix is copied
713 * to the upper left portion of the constructed matrix, and the remaining
714 * elements take values from the identity matrix.
716 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
717 if (single_scalar_parameter(parameters
)) {
718 /* Assign the scalar to the X component of a vec4, and fill the remaining
719 * components with zero.
721 ir_variable
*rhs_var
=
722 new(ctx
) ir_variable(glsl_type::vec4_type
, "mat_ctor_vec",
724 instructions
->push_tail(rhs_var
);
726 ir_constant_data zero
;
732 ir_instruction
*inst
=
733 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
734 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
736 instructions
->push_tail(inst
);
738 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
740 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
741 instructions
->push_tail(inst
);
743 /* Assign the temporary vector to each column of the destination matrix
744 * with a swizzle that puts the X component on the diagonal of the
745 * matrix. In some cases this may mean that the X component does not
746 * get assigned into the column at all (i.e., when the matrix has more
747 * columns than rows).
749 static const unsigned rhs_swiz
[4][4] = {
756 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
757 type
->vector_elements
);
758 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
759 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
760 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
762 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
763 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
764 type
->vector_elements
);
766 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
767 instructions
->push_tail(inst
);
770 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
771 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
772 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
774 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
775 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
776 type
->vector_elements
);
778 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
779 instructions
->push_tail(inst
);
781 } else if (first_param
->type
->is_matrix()) {
782 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
784 * "If a matrix is constructed from a matrix, then each component
785 * (column i, row j) in the result that has a corresponding
786 * component (column i, row j) in the argument will be initialized
787 * from there. All other components will be initialized to the
788 * identity matrix. If a matrix argument is given to a matrix
789 * constructor, it is an error to have any other arguments."
791 assert(first_param
->next
->is_tail_sentinel());
792 ir_rvalue
*const src_matrix
= first_param
;
794 /* If the source matrix is smaller, pre-initialize the relavent parts of
795 * the destination matrix to the identity matrix.
797 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
798 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
800 /* If the source matrix has fewer rows, every column of the destination
801 * must be initialized. Otherwise only the columns in the destination
802 * that do not exist in the source must be initialized.
805 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
806 ? 0 : src_matrix
->type
->matrix_columns
;
808 const glsl_type
*const col_type
= var
->type
->column_type();
809 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
810 ir_constant_data ident
;
819 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
821 ir_rvalue
*const lhs
=
822 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
824 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
825 instructions
->push_tail(inst
);
829 /* Assign columns from the source matrix to the destination matrix.
831 * Since the parameter will be used in the RHS of multiple assignments,
832 * generate a temporary and copy the paramter there.
834 ir_variable
*const rhs_var
=
835 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
837 instructions
->push_tail(rhs_var
);
839 ir_dereference
*const rhs_var_ref
=
840 new(ctx
) ir_dereference_variable(rhs_var
);
841 ir_instruction
*const inst
=
842 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
843 instructions
->push_tail(inst
);
845 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
846 var
->type
->vector_elements
);
847 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
848 var
->type
->matrix_columns
);
850 unsigned swiz
[4] = { 0, 0, 0, 0 };
851 for (unsigned i
= 1; i
< last_row
; i
++)
854 const unsigned write_mask
= (1U << last_row
) - 1;
856 for (unsigned i
= 0; i
< last_col
; i
++) {
857 ir_dereference
*const lhs
=
858 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
859 ir_rvalue
*const rhs_col
=
860 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
862 /* If one matrix has columns that are smaller than the columns of the
863 * other matrix, wrap the column access of the larger with a swizzle
864 * so that the LHS and RHS of the assignment have the same size (and
865 * therefore have the same type).
867 * It would be perfectly valid to unconditionally generate the
868 * swizzles, this this will typically result in a more compact IR tree.
871 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
872 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
877 ir_instruction
*inst
=
878 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
879 instructions
->push_tail(inst
);
882 const unsigned cols
= type
->matrix_columns
;
883 const unsigned rows
= type
->vector_elements
;
884 unsigned col_idx
= 0;
885 unsigned row_idx
= 0;
887 foreach_list (node
, parameters
) {
888 ir_rvalue
*const rhs
= (ir_rvalue
*) node
;
889 const unsigned components_remaining_this_column
= rows
- row_idx
;
890 unsigned rhs_components
= rhs
->type
->components();
891 unsigned rhs_base
= 0;
893 /* Since the parameter might be used in the RHS of two assignments,
894 * generate a temporary and copy the paramter there.
896 ir_variable
*rhs_var
=
897 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
898 instructions
->push_tail(rhs_var
);
900 ir_dereference
*rhs_var_ref
=
901 new(ctx
) ir_dereference_variable(rhs_var
);
902 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
903 instructions
->push_tail(inst
);
905 /* Assign the current parameter to as many components of the matrix
908 * NOTE: A single vector parameter can span two matrix columns. A
909 * single vec4, for example, can completely fill a mat2.
911 if (rhs_components
>= components_remaining_this_column
) {
912 const unsigned count
= MIN2(rhs_components
,
913 components_remaining_this_column
);
915 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
917 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
921 instructions
->push_tail(inst
);
929 /* If there is data left in the parameter and components left to be
930 * set in the destination, emit another assignment. It is possible
931 * that the assignment could be of a vec4 to the last element of the
932 * matrix. In this case col_idx==cols, but there is still data
933 * left in the source parameter. Obviously, don't emit an assignment
934 * to data outside the destination matrix.
936 if ((col_idx
< cols
) && (rhs_base
< rhs_components
)) {
937 const unsigned count
= rhs_components
- rhs_base
;
939 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
941 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
946 instructions
->push_tail(inst
);
953 return new(ctx
) ir_dereference_variable(var
);
958 emit_inline_record_constructor(const glsl_type
*type
,
959 exec_list
*instructions
,
960 exec_list
*parameters
,
963 ir_variable
*const var
=
964 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
965 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
967 instructions
->push_tail(var
);
969 exec_node
*node
= parameters
->head
;
970 for (unsigned i
= 0; i
< type
->length
; i
++) {
971 assert(!node
->is_tail_sentinel());
973 ir_dereference
*const lhs
=
974 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
975 type
->fields
.structure
[i
].name
);
977 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
980 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
982 instructions
->push_tail(assign
);
991 ast_function_expression::hir(exec_list
*instructions
,
992 struct _mesa_glsl_parse_state
*state
)
995 /* There are three sorts of function calls.
997 * 1. constructors - The first subexpression is an ast_type_specifier.
998 * 2. methods - Only the .length() method of array types.
999 * 3. functions - Calls to regular old functions.
1001 * Method calls are actually detected when the ast_field_selection
1002 * expression is handled.
1004 if (is_constructor()) {
1005 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1006 YYLTYPE loc
= type
->get_location();
1009 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1012 /* Constructors for samplers are illegal.
1014 if (constructor_type
->is_sampler()) {
1015 _mesa_glsl_error(& loc
, state
, "cannot construct sampler type `%s'",
1016 constructor_type
->name
);
1017 return ir_call::get_error_instruction(ctx
);
1020 if (constructor_type
->is_array()) {
1021 if (state
->language_version
<= 110) {
1022 _mesa_glsl_error(& loc
, state
,
1023 "array constructors forbidden in GLSL 1.10");
1024 return ir_call::get_error_instruction(ctx
);
1027 return process_array_constructor(instructions
, constructor_type
,
1028 & loc
, &this->expressions
, state
);
1032 /* There are two kinds of constructor call. Constructors for built-in
1033 * language types, such as mat4 and vec2, are free form. The only
1034 * requirement is that the parameters must provide enough values of the
1035 * correct scalar type. Constructors for arrays and structures must
1036 * have the exact number of parameters with matching types in the
1037 * correct order. These constructors follow essentially the same type
1038 * matching rules as functions.
1040 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1041 return ir_call::get_error_instruction(ctx
);
1043 /* Total number of components of the type being constructed. */
1044 const unsigned type_components
= constructor_type
->components();
1046 /* Number of components from parameters that have actually been
1047 * consumed. This is used to perform several kinds of error checking.
1049 unsigned components_used
= 0;
1051 unsigned matrix_parameters
= 0;
1052 unsigned nonmatrix_parameters
= 0;
1053 exec_list actual_parameters
;
1055 foreach_list (n
, &this->expressions
) {
1056 ast_node
*ast
= exec_node_data(ast_node
, n
, link
);
1057 ir_rvalue
*result
= ast
->hir(instructions
, state
)->as_rvalue();
1059 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1061 * "It is an error to provide extra arguments beyond this
1062 * last used argument."
1064 if (components_used
>= type_components
) {
1065 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1067 constructor_type
->name
);
1068 return ir_call::get_error_instruction(ctx
);
1071 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1072 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1073 "non-numeric data type",
1074 constructor_type
->name
);
1075 return ir_call::get_error_instruction(ctx
);
1078 /* Count the number of matrix and nonmatrix parameters. This
1079 * is used below to enforce some of the constructor rules.
1081 if (result
->type
->is_matrix())
1082 matrix_parameters
++;
1084 nonmatrix_parameters
++;
1086 actual_parameters
.push_tail(result
);
1087 components_used
+= result
->type
->components();
1090 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1092 * "It is an error to construct matrices from other matrices. This
1093 * is reserved for future use."
1095 if (state
->language_version
== 110 && matrix_parameters
> 0
1096 && constructor_type
->is_matrix()) {
1097 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1098 "matrix in GLSL 1.10",
1099 constructor_type
->name
);
1100 return ir_call::get_error_instruction(ctx
);
1103 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1105 * "If a matrix argument is given to a matrix constructor, it is
1106 * an error to have any other arguments."
1108 if ((matrix_parameters
> 0)
1109 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1110 && constructor_type
->is_matrix()) {
1111 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1112 "matrix must be only parameter",
1113 constructor_type
->name
);
1114 return ir_call::get_error_instruction(ctx
);
1117 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1119 * "In these cases, there must be enough components provided in the
1120 * arguments to provide an initializer for every component in the
1121 * constructed value."
1123 if (components_used
< type_components
&& components_used
!= 1
1124 && matrix_parameters
== 0) {
1125 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1127 constructor_type
->name
);
1128 return ir_call::get_error_instruction(ctx
);
1131 /* Later, we cast each parameter to the same base type as the
1132 * constructor. Since there are no non-floating point matrices, we
1133 * need to break them up into a series of column vectors.
1135 if (constructor_type
->base_type
!= GLSL_TYPE_FLOAT
) {
1136 foreach_list_safe(n
, &actual_parameters
) {
1137 ir_rvalue
*matrix
= (ir_rvalue
*) n
;
1139 if (!matrix
->type
->is_matrix())
1142 /* Create a temporary containing the matrix. */
1143 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1145 instructions
->push_tail(var
);
1146 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1147 ir_dereference_variable(var
), matrix
, NULL
));
1148 var
->constant_value
= matrix
->constant_expression_value();
1150 /* Replace the matrix with dereferences of its columns. */
1151 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1152 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1153 new(ctx
) ir_constant(i
)));
1159 bool all_parameters_are_constant
= true;
1161 /* Type cast each parameter and, if possible, fold constants.*/
1162 foreach_list_safe(n
, &actual_parameters
) {
1163 ir_rvalue
*ir
= (ir_rvalue
*) n
;
1165 const glsl_type
*desired_type
=
1166 glsl_type::get_instance(constructor_type
->base_type
,
1167 ir
->type
->vector_elements
,
1168 ir
->type
->matrix_columns
);
1169 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1171 /* Attempt to convert the parameter to a constant valued expression.
1172 * After doing so, track whether or not all the parameters to the
1173 * constructor are trivially constant valued expressions.
1175 ir_rvalue
*const constant
= result
->constant_expression_value();
1177 if (constant
!= NULL
)
1180 all_parameters_are_constant
= false;
1183 ir
->replace_with(result
);
1187 /* If all of the parameters are trivially constant, create a
1188 * constant representing the complete collection of parameters.
1190 if (all_parameters_are_constant
) {
1191 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1192 } else if (constructor_type
->is_scalar()) {
1193 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1195 } else if (constructor_type
->is_vector()) {
1196 return emit_inline_vector_constructor(constructor_type
,
1201 assert(constructor_type
->is_matrix());
1202 return emit_inline_matrix_constructor(constructor_type
,
1208 const ast_expression
*id
= subexpressions
[0];
1209 YYLTYPE loc
= id
->get_location();
1210 exec_list actual_parameters
;
1212 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1215 const glsl_type
*const type
=
1216 state
->symbols
->get_type(id
->primary_expression
.identifier
);
1218 if ((type
!= NULL
) && type
->is_record()) {
1219 exec_node
*node
= actual_parameters
.head
;
1220 for (unsigned i
= 0; i
< type
->length
; i
++) {
1221 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1223 if (node
->is_tail_sentinel()) {
1224 _mesa_glsl_error(&loc
, state
,
1225 "insufficient parameters to constructor "
1228 return ir_call::get_error_instruction(ctx
);
1231 if (apply_implicit_conversion(type
->fields
.structure
[i
].type
, ir
,
1233 node
->replace_with(ir
);
1235 _mesa_glsl_error(&loc
, state
,
1236 "parameter type mismatch in constructor "
1237 "for `%s.%s' (%s vs %s)",
1239 type
->fields
.structure
[i
].name
,
1241 type
->fields
.structure
[i
].type
->name
);
1242 return ir_call::get_error_instruction(ctx
);;
1248 if (!node
->is_tail_sentinel()) {
1249 _mesa_glsl_error(&loc
, state
, "too many parameters in constructor "
1250 "for `%s'", type
->name
);
1251 return ir_call::get_error_instruction(ctx
);
1254 ir_rvalue
*const constant
=
1255 constant_record_constructor(type
, &actual_parameters
, state
);
1257 return (constant
!= NULL
)
1259 : emit_inline_record_constructor(type
, instructions
,
1260 &actual_parameters
, state
);
1263 return match_function_by_name(instructions
,
1264 id
->primary_expression
.identifier
, & loc
,
1265 &actual_parameters
, state
);
1268 return ir_call::get_error_instruction(ctx
);