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 */
29 #include "main/shaderobj.h"
32 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
35 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
36 struct _mesa_glsl_parse_state
*state
);
39 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
40 exec_list
*parameters
,
41 struct _mesa_glsl_parse_state
*state
)
45 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
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 List of \c ir_instruction nodes representing the
66 * parameter list for the function. This may be either a
67 * formal (\c ir_variable) or actual (\c ir_rvalue)
68 * parameter list. Only the type is used.
71 * A ralloced string representing the prototype of the function.
74 prototype_string(const glsl_type
*return_type
, const char *name
,
75 exec_list
*parameters
)
79 if (return_type
!= NULL
)
80 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
82 ralloc_asprintf_append(&str
, "%s(", name
);
84 const char *comma
= "";
85 foreach_in_list(const ir_variable
, param
, parameters
) {
86 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
90 ralloc_strcat(&str
, ")");
95 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
96 const ir_variable
*formal
, const ir_variable
*actual
)
99 * From the ARB_shader_image_load_store specification:
101 * "The values of image variables qualified with coherent,
102 * volatile, restrict, readonly, or writeonly may not be passed
103 * to functions whose formal parameters lack such
104 * qualifiers. [...] It is legal to have additional qualifiers
105 * on a formal parameter, but not to have fewer."
107 if (actual
->data
.image_coherent
&& !formal
->data
.image_coherent
) {
108 _mesa_glsl_error(loc
, state
,
109 "function call parameter `%s' drops "
110 "`coherent' qualifier", formal
->name
);
114 if (actual
->data
.image_volatile
&& !formal
->data
.image_volatile
) {
115 _mesa_glsl_error(loc
, state
,
116 "function call parameter `%s' drops "
117 "`volatile' qualifier", formal
->name
);
121 if (actual
->data
.image_restrict
&& !formal
->data
.image_restrict
) {
122 _mesa_glsl_error(loc
, state
,
123 "function call parameter `%s' drops "
124 "`restrict' qualifier", formal
->name
);
128 if (actual
->data
.image_read_only
&& !formal
->data
.image_read_only
) {
129 _mesa_glsl_error(loc
, state
,
130 "function call parameter `%s' drops "
131 "`readonly' qualifier", formal
->name
);
135 if (actual
->data
.image_write_only
&& !formal
->data
.image_write_only
) {
136 _mesa_glsl_error(loc
, state
,
137 "function call parameter `%s' drops "
138 "`writeonly' qualifier", formal
->name
);
146 verify_first_atomic_ssbo_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
149 if (!var
|| !var
->is_in_shader_storage_block()) {
150 _mesa_glsl_error(loc
, state
, "First argument to atomic function "
151 "must be a buffer variable");
158 is_atomic_ssbo_function(const char *func_name
)
160 return !strcmp(func_name
, "atomicAdd") ||
161 !strcmp(func_name
, "atomicMin") ||
162 !strcmp(func_name
, "atomicMax") ||
163 !strcmp(func_name
, "atomicAnd") ||
164 !strcmp(func_name
, "atomicOr") ||
165 !strcmp(func_name
, "atomicXor") ||
166 !strcmp(func_name
, "atomicExchange") ||
167 !strcmp(func_name
, "atomicCompSwap");
171 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
172 * that 'const_in' formal parameters (an extension in our IR) correspond to
173 * ir_constant actual parameters.
176 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
177 ir_function_signature
*sig
,
178 exec_list
&actual_ir_parameters
,
179 exec_list
&actual_ast_parameters
)
181 exec_node
*actual_ir_node
= actual_ir_parameters
.head
;
182 exec_node
*actual_ast_node
= actual_ast_parameters
.head
;
184 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
185 /* The lists must be the same length. */
186 assert(!actual_ir_node
->is_tail_sentinel());
187 assert(!actual_ast_node
->is_tail_sentinel());
189 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
190 const ast_expression
*const actual_ast
=
191 exec_node_data(ast_expression
, actual_ast_node
, link
);
193 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
196 YYLTYPE loc
= actual_ast
->get_location();
198 /* Verify that 'const_in' parameters are ir_constants. */
199 if (formal
->data
.mode
== ir_var_const_in
&&
200 actual
->ir_type
!= ir_type_constant
) {
201 _mesa_glsl_error(&loc
, state
,
202 "parameter `in %s' must be a constant expression",
207 /* Verify that shader_in parameters are shader inputs */
208 if (formal
->data
.must_be_shader_input
) {
209 ir_variable
*var
= actual
->variable_referenced();
210 if (var
&& var
->data
.mode
!= ir_var_shader_in
) {
211 _mesa_glsl_error(&loc
, state
,
212 "parameter `%s` must be a shader input",
217 if (actual
->ir_type
== ir_type_swizzle
) {
218 _mesa_glsl_error(&loc
, state
,
219 "parameter `%s` must not be swizzled",
225 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
226 if (formal
->data
.mode
== ir_var_function_out
227 || formal
->data
.mode
== ir_var_function_inout
) {
228 const char *mode
= NULL
;
229 switch (formal
->data
.mode
) {
230 case ir_var_function_out
: mode
= "out"; break;
231 case ir_var_function_inout
: mode
= "inout"; break;
232 default: assert(false); break;
235 /* This AST-based check catches errors like f(i++). The IR-based
236 * is_lvalue() is insufficient because the actual parameter at the
237 * IR-level is just a temporary value, which is an l-value.
239 if (actual_ast
->non_lvalue_description
!= NULL
) {
240 _mesa_glsl_error(&loc
, state
,
241 "function parameter '%s %s' references a %s",
243 actual_ast
->non_lvalue_description
);
247 ir_variable
*var
= actual
->variable_referenced();
249 var
->data
.assigned
= true;
251 if (var
&& var
->data
.read_only
) {
252 _mesa_glsl_error(&loc
, state
,
253 "function parameter '%s %s' references the "
254 "read-only variable '%s'",
256 actual
->variable_referenced()->name
);
258 } else if (!actual
->is_lvalue()) {
259 /* Even though ir_binop_vector_extract is not an l-value, let it
260 * slop through. generate_call will handle it correctly.
262 ir_expression
*const expr
= ((ir_rvalue
*) actual
)->as_expression();
264 || expr
->operation
!= ir_binop_vector_extract
265 || !expr
->operands
[0]->is_lvalue()) {
266 _mesa_glsl_error(&loc
, state
,
267 "function parameter '%s %s' is not an lvalue",
274 if (formal
->type
->is_image() &&
275 actual
->variable_referenced()) {
276 if (!verify_image_parameter(&loc
, state
, formal
,
277 actual
->variable_referenced()))
281 actual_ir_node
= actual_ir_node
->next
;
282 actual_ast_node
= actual_ast_node
->next
;
285 /* The first parameter of atomic functions must be a buffer variable */
286 const char *func_name
= sig
->function_name();
287 bool is_atomic_ssbo
= is_atomic_ssbo_function(func_name
);
288 if (is_atomic_ssbo
) {
289 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_parameters
.head
;
291 const ast_expression
*const actual_ast
=
292 exec_node_data(ast_expression
, actual_ast_parameters
.head
, link
);
293 YYLTYPE loc
= actual_ast
->get_location();
295 if (!verify_first_atomic_ssbo_parameter(&loc
, state
,
296 actual
->variable_referenced())) {
305 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
306 exec_list
*before_instructions
, exec_list
*after_instructions
,
307 bool parameter_is_inout
)
309 ir_expression
*const expr
= actual
->as_expression();
311 /* If the types match exactly and the parameter is not a vector-extract,
312 * nothing needs to be done to fix the parameter.
314 if (formal_type
== actual
->type
315 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
318 /* To convert an out parameter, we need to create a temporary variable to
319 * hold the value before conversion, and then perform the conversion after
320 * the function call returns.
322 * This has the effect of transforming code like this:
328 * Into IR that's equivalent to this:
332 * int out_parameter_conversion;
333 * f(out_parameter_conversion);
334 * value = float(out_parameter_conversion);
336 * If the parameter is an ir_expression of ir_binop_vector_extract,
337 * additional conversion is needed in the post-call re-write.
340 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
342 before_instructions
->push_tail(tmp
);
344 /* If the parameter is an inout parameter, copy the value of the actual
345 * parameter to the new temporary. Note that no type conversion is allowed
346 * here because inout parameters must match types exactly.
348 if (parameter_is_inout
) {
349 /* Inout parameters should never require conversion, since that would
350 * require an implicit conversion to exist both to and from the formal
351 * parameter type, and there are no bidirectional implicit conversions.
353 assert (actual
->type
== formal_type
);
355 ir_dereference_variable
*const deref_tmp_1
=
356 new(mem_ctx
) ir_dereference_variable(tmp
);
357 ir_assignment
*const assignment
=
358 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
359 before_instructions
->push_tail(assignment
);
362 /* Replace the parameter in the call with a dereference of the new
365 ir_dereference_variable
*const deref_tmp_2
=
366 new(mem_ctx
) ir_dereference_variable(tmp
);
367 actual
->replace_with(deref_tmp_2
);
370 /* Copy the temporary variable to the actual parameter with optional
371 * type conversion applied.
373 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
374 if (actual
->type
!= formal_type
)
375 rhs
= convert_component(rhs
, actual
->type
);
377 ir_rvalue
*lhs
= actual
;
378 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
379 rhs
= new(mem_ctx
) ir_expression(ir_triop_vector_insert
,
380 expr
->operands
[0]->type
,
381 expr
->operands
[0]->clone(mem_ctx
, NULL
),
383 expr
->operands
[1]->clone(mem_ctx
, NULL
));
384 lhs
= expr
->operands
[0]->clone(mem_ctx
, NULL
);
387 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
388 after_instructions
->push_tail(assignment_2
);
392 * Generate a function call.
394 * For non-void functions, this returns a dereference of the temporary variable
395 * which stores the return value for the call. For void functions, this returns
399 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
400 exec_list
*actual_parameters
,
401 ir_variable
*sub_var
,
402 ir_rvalue
*array_idx
,
403 struct _mesa_glsl_parse_state
*state
)
406 exec_list post_call_conversions
;
408 /* Perform implicit conversion of arguments. For out parameters, we need
409 * to place them in a temporary variable and do the conversion after the
410 * call takes place. Since we haven't emitted the call yet, we'll place
411 * the post-call conversions in a temporary exec_list, and emit them later.
413 foreach_two_lists(formal_node
, &sig
->parameters
,
414 actual_node
, actual_parameters
) {
415 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
416 ir_variable
*formal
= (ir_variable
*) formal_node
;
418 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
419 switch (formal
->data
.mode
) {
420 case ir_var_const_in
:
421 case ir_var_function_in
: {
423 = convert_component(actual
, formal
->type
);
424 actual
->replace_with(converted
);
427 case ir_var_function_out
:
428 case ir_var_function_inout
:
429 fix_parameter(ctx
, actual
, formal
->type
,
430 instructions
, &post_call_conversions
,
431 formal
->data
.mode
== ir_var_function_inout
);
434 assert (!"Illegal formal parameter mode");
440 /* If the function call is a constant expression, don't generate any
441 * instructions; just generate an ir_constant.
443 * Function calls were first allowed to be constant expressions in GLSL
444 * 1.20 and GLSL ES 3.00.
446 if (state
->is_version(120, 300)) {
447 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
453 ir_dereference_variable
*deref
= NULL
;
454 if (!sig
->return_type
->is_void()) {
455 /* Create a new temporary to hold the return value. */
456 char *const name
= ir_variable::temporaries_allocate_names
457 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
462 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
463 instructions
->push_tail(var
);
467 deref
= new(ctx
) ir_dereference_variable(var
);
470 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
, sub_var
, array_idx
);
471 instructions
->push_tail(call
);
473 /* Also emit any necessary out-parameter conversions. */
474 instructions
->append_list(&post_call_conversions
);
476 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
480 * Given a function name and parameter list, find the matching signature.
482 static ir_function_signature
*
483 match_function_by_name(const char *name
,
484 exec_list
*actual_parameters
,
485 struct _mesa_glsl_parse_state
*state
)
488 ir_function
*f
= state
->symbols
->get_function(name
);
489 ir_function_signature
*local_sig
= NULL
;
490 ir_function_signature
*sig
= NULL
;
492 /* Is the function hidden by a record type constructor? */
493 if (state
->symbols
->get_type(name
))
494 goto done
; /* no match */
496 /* Is the function hidden by a variable (impossible in 1.10)? */
497 if (!state
->symbols
->separate_function_namespace
498 && state
->symbols
->get_variable(name
))
499 goto done
; /* no match */
502 /* In desktop GL, the presence of a user-defined signature hides any
503 * built-in signatures, so we must ignore them. In contrast, in ES2
504 * user-defined signatures add new overloads, so we must consider them.
506 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
508 /* Look for a match in the local shader. If exact, we're done. */
509 bool is_exact
= false;
510 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
511 allow_builtins
, &is_exact
);
519 /* Local shader has no exact candidates; check the built-ins. */
520 _mesa_glsl_initialize_builtin_functions();
521 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
525 /* If the match is from a linked built-in shader, import the prototype. */
526 if (sig
!= local_sig
) {
528 f
= new(ctx
) ir_function(name
);
529 state
->symbols
->add_global_function(f
);
530 emit_function(state
, f
);
532 f
->add_signature(sig
->clone_prototype(f
, NULL
));
538 static ir_function_signature
*
539 match_subroutine_by_name(const char *name
,
540 exec_list
*actual_parameters
,
541 struct _mesa_glsl_parse_state
*state
,
545 ir_function_signature
*sig
= NULL
;
546 ir_function
*f
, *found
= NULL
;
547 const char *new_name
;
549 bool is_exact
= false;
551 new_name
= ralloc_asprintf(ctx
, "%s_%s", _mesa_shader_stage_to_subroutine_prefix(state
->stage
), name
);
552 var
= state
->symbols
->get_variable(new_name
);
556 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
557 f
= state
->subroutine_types
[i
];
558 if (strcmp(f
->name
, var
->type
->without_array()->name
))
567 sig
= found
->matching_signature(state
, actual_parameters
,
573 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
579 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
580 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
583 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
584 _mesa_glsl_error(loc
, state
, " %s", str
);
590 * Raise a "no matching function" error, listing all possible overloads the
591 * compiler considered so developers can figure out what went wrong.
594 no_matching_function_error(const char *name
,
596 exec_list
*actual_parameters
,
597 _mesa_glsl_parse_state
*state
)
599 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
601 if (state
->symbols
->get_function(name
) == NULL
602 && (!state
->uses_builtin_functions
603 || sh
->symbols
->get_function(name
) == NULL
)) {
604 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
606 char *str
= prototype_string(NULL
, name
, actual_parameters
);
607 _mesa_glsl_error(loc
, state
,
608 "no matching function for call to `%s'; candidates are:",
612 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
614 if (state
->uses_builtin_functions
) {
615 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
621 * Perform automatic type conversion of constructor parameters
623 * This implements the rules in the "Conversion and Scalar Constructors"
624 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
627 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
629 void *ctx
= ralloc_parent(src
);
630 const unsigned a
= desired_type
->base_type
;
631 const unsigned b
= src
->type
->base_type
;
632 ir_expression
*result
= NULL
;
634 if (src
->type
->is_error())
637 assert(a
<= GLSL_TYPE_BOOL
);
638 assert(b
<= GLSL_TYPE_BOOL
);
647 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
649 case GLSL_TYPE_FLOAT
:
650 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
653 result
= new(ctx
) ir_expression(ir_unop_i2u
,
654 new(ctx
) ir_expression(ir_unop_b2i
, src
));
656 case GLSL_TYPE_DOUBLE
:
657 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
664 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
666 case GLSL_TYPE_FLOAT
:
667 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
670 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
672 case GLSL_TYPE_DOUBLE
:
673 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
677 case GLSL_TYPE_FLOAT
:
680 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
683 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
686 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
688 case GLSL_TYPE_DOUBLE
:
689 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
696 result
= new(ctx
) ir_expression(ir_unop_i2b
,
697 new(ctx
) ir_expression(ir_unop_u2i
, src
));
700 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
702 case GLSL_TYPE_FLOAT
:
703 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
705 case GLSL_TYPE_DOUBLE
:
706 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
710 case GLSL_TYPE_DOUBLE
:
713 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
716 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
719 result
= new(ctx
) ir_expression(ir_unop_f2d
,
720 new(ctx
) ir_expression(ir_unop_b2f
, src
));
722 case GLSL_TYPE_FLOAT
:
723 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
728 assert(result
!= NULL
);
729 assert(result
->type
== desired_type
);
731 /* Try constant folding; it may fold in the conversion we just added. */
732 ir_constant
*const constant
= result
->constant_expression_value();
733 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
737 * Dereference a specific component from a scalar, vector, or matrix
740 dereference_component(ir_rvalue
*src
, unsigned component
)
742 void *ctx
= ralloc_parent(src
);
743 assert(component
< src
->type
->components());
745 /* If the source is a constant, just create a new constant instead of a
746 * dereference of the existing constant.
748 ir_constant
*constant
= src
->as_constant();
750 return new(ctx
) ir_constant(constant
, component
);
752 if (src
->type
->is_scalar()) {
754 } else if (src
->type
->is_vector()) {
755 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
757 assert(src
->type
->is_matrix());
759 /* Dereference a row of the matrix, then call this function again to get
760 * a specific element from that row.
762 const int c
= component
/ src
->type
->column_type()->vector_elements
;
763 const int r
= component
% src
->type
->column_type()->vector_elements
;
764 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
765 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
767 col
->type
= src
->type
->column_type();
769 return dereference_component(col
, r
);
772 assert(!"Should not get here.");
778 process_vec_mat_constructor(exec_list
*instructions
,
779 const glsl_type
*constructor_type
,
780 YYLTYPE
*loc
, exec_list
*parameters
,
781 struct _mesa_glsl_parse_state
*state
)
785 /* The ARB_shading_language_420pack spec says:
787 * "If an initializer is a list of initializers enclosed in curly braces,
788 * the variable being declared must be a vector, a matrix, an array, or a
791 * int i = { 1 }; // illegal, i is not an aggregate"
793 if (constructor_type
->vector_elements
<= 1) {
794 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
795 "matrices, arrays, and structs");
796 return ir_rvalue::error_value(ctx
);
799 exec_list actual_parameters
;
800 const unsigned parameter_count
=
801 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
803 if (parameter_count
== 0
804 || (constructor_type
->is_vector() &&
805 constructor_type
->vector_elements
!= parameter_count
)
806 || (constructor_type
->is_matrix() &&
807 constructor_type
->matrix_columns
!= parameter_count
)) {
808 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
809 constructor_type
->is_vector() ? "vector" : "matrix",
810 constructor_type
->vector_elements
);
811 return ir_rvalue::error_value(ctx
);
814 bool all_parameters_are_constant
= true;
816 /* Type cast each parameter and, if possible, fold constants. */
817 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
818 ir_rvalue
*result
= ir
;
820 /* Apply implicit conversions (not the scalar constructor rules!). See
821 * the spec quote above. */
822 if (constructor_type
->base_type
!= result
->type
->base_type
) {
823 const glsl_type
*desired_type
=
824 glsl_type::get_instance(constructor_type
->base_type
,
825 ir
->type
->vector_elements
,
826 ir
->type
->matrix_columns
);
827 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
828 /* Even though convert_component() implements the constructor
829 * conversion rules (not the implicit conversion rules), its safe
830 * to use it here because we already checked that the implicit
831 * conversion is legal.
833 result
= convert_component(ir
, desired_type
);
837 if (constructor_type
->is_matrix()) {
838 if (result
->type
!= constructor_type
->column_type()) {
839 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
840 "expected: %s, found %s",
841 constructor_type
->column_type()->name
,
843 return ir_rvalue::error_value(ctx
);
845 } else if (result
->type
!= constructor_type
->get_scalar_type()) {
846 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
847 "expected: %s, found %s",
848 constructor_type
->get_scalar_type()->name
,
850 return ir_rvalue::error_value(ctx
);
853 /* Attempt to convert the parameter to a constant valued expression.
854 * After doing so, track whether or not all the parameters to the
855 * constructor are trivially constant valued expressions.
857 ir_rvalue
*const constant
= result
->constant_expression_value();
859 if (constant
!= NULL
)
862 all_parameters_are_constant
= false;
864 ir
->replace_with(result
);
867 if (all_parameters_are_constant
)
868 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
870 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
872 instructions
->push_tail(var
);
876 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
877 ir_instruction
*assignment
= NULL
;
879 if (var
->type
->is_matrix()) {
880 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
881 new(ctx
) ir_constant(i
));
882 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
884 /* use writemask rather than index for vector */
885 assert(var
->type
->is_vector());
887 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
888 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
891 instructions
->push_tail(assignment
);
896 return new(ctx
) ir_dereference_variable(var
);
901 process_array_constructor(exec_list
*instructions
,
902 const glsl_type
*constructor_type
,
903 YYLTYPE
*loc
, exec_list
*parameters
,
904 struct _mesa_glsl_parse_state
*state
)
907 /* Array constructors come in two forms: sized and unsized. Sized array
908 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
909 * variables. In this case the number of parameters must exactly match the
910 * specified size of the array.
912 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
913 * are vec4 variables. In this case the size of the array being constructed
914 * is determined by the number of parameters.
916 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
918 * "There must be exactly the same number of arguments as the size of
919 * the array being constructed. If no size is present in the
920 * constructor, then the array is explicitly sized to the number of
921 * arguments provided. The arguments are assigned in order, starting at
922 * element 0, to the elements of the constructed array. Each argument
923 * must be the same type as the element type of the array, or be a type
924 * that can be converted to the element type of the array according to
925 * Section 4.1.10 "Implicit Conversions.""
927 exec_list actual_parameters
;
928 const unsigned parameter_count
=
929 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
930 bool is_unsized_array
= constructor_type
->is_unsized_array();
932 if ((parameter_count
== 0) ||
933 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
934 const unsigned min_param
= is_unsized_array
935 ? 1 : constructor_type
->length
;
937 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
939 is_unsized_array
? "at least" : "exactly",
940 min_param
, (min_param
<= 1) ? "" : "s");
941 return ir_rvalue::error_value(ctx
);
944 if (is_unsized_array
) {
946 glsl_type::get_array_instance(constructor_type
->fields
.array
,
948 assert(constructor_type
!= NULL
);
949 assert(constructor_type
->length
== parameter_count
);
952 bool all_parameters_are_constant
= true;
954 /* Type cast each parameter and, if possible, fold constants. */
955 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
956 ir_rvalue
*result
= ir
;
958 const glsl_base_type element_base_type
=
959 constructor_type
->fields
.array
->base_type
;
961 /* Apply implicit conversions (not the scalar constructor rules!). See
962 * the spec quote above. */
963 if (element_base_type
!= result
->type
->base_type
) {
964 const glsl_type
*desired_type
=
965 glsl_type::get_instance(element_base_type
,
966 ir
->type
->vector_elements
,
967 ir
->type
->matrix_columns
);
969 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
970 /* Even though convert_component() implements the constructor
971 * conversion rules (not the implicit conversion rules), its safe
972 * to use it here because we already checked that the implicit
973 * conversion is legal.
975 result
= convert_component(ir
, desired_type
);
979 if (result
->type
!= constructor_type
->fields
.array
) {
980 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
981 "expected: %s, found %s",
982 constructor_type
->fields
.array
->name
,
984 return ir_rvalue::error_value(ctx
);
987 /* Attempt to convert the parameter to a constant valued expression.
988 * After doing so, track whether or not all the parameters to the
989 * constructor are trivially constant valued expressions.
991 ir_rvalue
*const constant
= result
->constant_expression_value();
993 if (constant
!= NULL
)
996 all_parameters_are_constant
= false;
998 ir
->replace_with(result
);
1001 if (all_parameters_are_constant
)
1002 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1004 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1006 instructions
->push_tail(var
);
1009 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1010 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1011 new(ctx
) ir_constant(i
));
1013 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1014 instructions
->push_tail(assignment
);
1019 return new(ctx
) ir_dereference_variable(var
);
1024 * Try to convert a record constructor to a constant expression
1026 static ir_constant
*
1027 constant_record_constructor(const glsl_type
*constructor_type
,
1028 exec_list
*parameters
, void *mem_ctx
)
1030 foreach_in_list(ir_instruction
, node
, parameters
) {
1031 ir_constant
*constant
= node
->as_constant();
1032 if (constant
== NULL
)
1034 node
->replace_with(constant
);
1037 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
1042 * Determine if a list consists of a single scalar r-value
1045 single_scalar_parameter(exec_list
*parameters
)
1047 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
1048 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1050 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1055 * Generate inline code for a vector constructor
1057 * The generated constructor code will consist of a temporary variable
1058 * declaration of the same type as the constructor. A sequence of assignments
1059 * from constructor parameters to the temporary will follow.
1062 * An \c ir_dereference_variable of the temprorary generated in the constructor
1066 emit_inline_vector_constructor(const glsl_type
*type
,
1067 exec_list
*instructions
,
1068 exec_list
*parameters
,
1071 assert(!parameters
->is_empty());
1073 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1074 instructions
->push_tail(var
);
1076 /* There are three kinds of vector constructors.
1078 * - Construct a vector from a single scalar by replicating that scalar to
1079 * all components of the vector.
1081 * - Construct a vector from at least a matrix. This case should already
1082 * have been taken care of in ast_function_expression::hir by breaking
1083 * down the matrix into a series of column vectors.
1085 * - Construct a vector from an arbirary combination of vectors and
1086 * scalars. The components of the constructor parameters are assigned
1087 * to the vector in order until the vector is full.
1089 const unsigned lhs_components
= type
->components();
1090 if (single_scalar_parameter(parameters
)) {
1091 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
1092 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1094 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1095 const unsigned mask
= (1U << lhs_components
) - 1;
1097 assert(rhs
->type
== lhs
->type
);
1099 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1100 instructions
->push_tail(inst
);
1102 unsigned base_component
= 0;
1103 unsigned base_lhs_component
= 0;
1104 ir_constant_data data
;
1105 unsigned constant_mask
= 0, constant_components
= 0;
1107 memset(&data
, 0, sizeof(data
));
1109 foreach_in_list(ir_rvalue
, param
, parameters
) {
1110 unsigned rhs_components
= param
->type
->components();
1112 /* Do not try to assign more components to the vector than it has!
1114 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1115 rhs_components
= lhs_components
- base_lhs_component
;
1118 const ir_constant
*const c
= param
->as_constant();
1120 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1121 switch (c
->type
->base_type
) {
1122 case GLSL_TYPE_UINT
:
1123 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1126 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1128 case GLSL_TYPE_FLOAT
:
1129 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1131 case GLSL_TYPE_DOUBLE
:
1132 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1134 case GLSL_TYPE_BOOL
:
1135 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1138 assert(!"Should not get here.");
1143 /* Mask of fields to be written in the assignment.
1145 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1146 constant_components
+= rhs_components
;
1148 base_component
+= rhs_components
;
1150 /* Advance the component index by the number of components
1151 * that were just assigned.
1153 base_lhs_component
+= rhs_components
;
1156 if (constant_mask
!= 0) {
1157 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1158 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1159 constant_components
,
1161 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1163 ir_instruction
*inst
=
1164 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1165 instructions
->push_tail(inst
);
1169 foreach_in_list(ir_rvalue
, param
, parameters
) {
1170 unsigned rhs_components
= param
->type
->components();
1172 /* Do not try to assign more components to the vector than it has!
1174 if ((rhs_components
+ base_component
) > lhs_components
) {
1175 rhs_components
= lhs_components
- base_component
;
1178 /* If we do not have any components left to copy, break out of the
1179 * loop. This can happen when initializing a vec4 with a mat3 as the
1180 * mat3 would have been broken into a series of column vectors.
1182 if (rhs_components
== 0) {
1186 const ir_constant
*const c
= param
->as_constant();
1188 /* Mask of fields to be written in the assignment.
1190 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1193 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1195 /* Generate a swizzle so that LHS and RHS sizes match.
1198 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1200 ir_instruction
*inst
=
1201 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1202 instructions
->push_tail(inst
);
1205 /* Advance the component index by the number of components that were
1208 base_component
+= rhs_components
;
1211 return new(ctx
) ir_dereference_variable(var
);
1216 * Generate assignment of a portion of a vector to a portion of a matrix column
1218 * \param src_base First component of the source to be used in assignment
1219 * \param column Column of destination to be assiged
1220 * \param row_base First component of the destination column to be assigned
1221 * \param count Number of components to be assigned
1224 * \c src_base + \c count must be less than or equal to the number of components
1225 * in the source vector.
1228 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1229 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1232 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1233 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1235 assert(column_ref
->type
->components() >= (row_base
+ count
));
1236 assert(src
->type
->components() >= (src_base
+ count
));
1238 /* Generate a swizzle that extracts the number of components from the source
1239 * that are to be assigned to the column of the matrix.
1241 if (count
< src
->type
->vector_elements
) {
1242 src
= new(mem_ctx
) ir_swizzle(src
,
1243 src_base
+ 0, src_base
+ 1,
1244 src_base
+ 2, src_base
+ 3,
1248 /* Mask of fields to be written in the assignment.
1250 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1252 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1257 * Generate inline code for a matrix constructor
1259 * The generated constructor code will consist of a temporary variable
1260 * declaration of the same type as the constructor. A sequence of assignments
1261 * from constructor parameters to the temporary will follow.
1264 * An \c ir_dereference_variable of the temprorary generated in the constructor
1268 emit_inline_matrix_constructor(const glsl_type
*type
,
1269 exec_list
*instructions
,
1270 exec_list
*parameters
,
1273 assert(!parameters
->is_empty());
1275 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1276 instructions
->push_tail(var
);
1278 /* There are three kinds of matrix constructors.
1280 * - Construct a matrix from a single scalar by replicating that scalar to
1281 * along the diagonal of the matrix and setting all other components to
1284 * - Construct a matrix from an arbirary combination of vectors and
1285 * scalars. The components of the constructor parameters are assigned
1286 * to the matrix in column-major order until the matrix is full.
1288 * - Construct a matrix from a single matrix. The source matrix is copied
1289 * to the upper left portion of the constructed matrix, and the remaining
1290 * elements take values from the identity matrix.
1292 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
1293 if (single_scalar_parameter(parameters
)) {
1294 /* Assign the scalar to the X component of a vec4, and fill the remaining
1295 * components with zero.
1297 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1298 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1299 param_base_type
== GLSL_TYPE_DOUBLE
);
1300 ir_variable
*rhs_var
=
1301 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1304 instructions
->push_tail(rhs_var
);
1306 ir_constant_data zero
;
1307 for (unsigned i
= 0; i
< 4; i
++)
1308 if (param_base_type
== GLSL_TYPE_FLOAT
)
1313 ir_instruction
*inst
=
1314 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1315 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1317 instructions
->push_tail(inst
);
1319 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1321 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1322 instructions
->push_tail(inst
);
1324 /* Assign the temporary vector to each column of the destination matrix
1325 * with a swizzle that puts the X component on the diagonal of the
1326 * matrix. In some cases this may mean that the X component does not
1327 * get assigned into the column at all (i.e., when the matrix has more
1328 * columns than rows).
1330 static const unsigned rhs_swiz
[4][4] = {
1337 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1338 type
->vector_elements
);
1339 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1340 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1341 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1343 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1344 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1345 type
->vector_elements
);
1347 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1348 instructions
->push_tail(inst
);
1351 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1352 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1353 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1355 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1356 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1357 type
->vector_elements
);
1359 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1360 instructions
->push_tail(inst
);
1362 } else if (first_param
->type
->is_matrix()) {
1363 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1365 * "If a matrix is constructed from a matrix, then each component
1366 * (column i, row j) in the result that has a corresponding
1367 * component (column i, row j) in the argument will be initialized
1368 * from there. All other components will be initialized to the
1369 * identity matrix. If a matrix argument is given to a matrix
1370 * constructor, it is an error to have any other arguments."
1372 assert(first_param
->next
->is_tail_sentinel());
1373 ir_rvalue
*const src_matrix
= first_param
;
1375 /* If the source matrix is smaller, pre-initialize the relavent parts of
1376 * the destination matrix to the identity matrix.
1378 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
1379 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1381 /* If the source matrix has fewer rows, every column of the destination
1382 * must be initialized. Otherwise only the columns in the destination
1383 * that do not exist in the source must be initialized.
1386 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1387 ? 0 : src_matrix
->type
->matrix_columns
;
1389 const glsl_type
*const col_type
= var
->type
->column_type();
1390 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1391 ir_constant_data ident
;
1400 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1402 ir_rvalue
*const lhs
=
1403 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1405 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1406 instructions
->push_tail(inst
);
1410 /* Assign columns from the source matrix to the destination matrix.
1412 * Since the parameter will be used in the RHS of multiple assignments,
1413 * generate a temporary and copy the paramter there.
1415 ir_variable
*const rhs_var
=
1416 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1418 instructions
->push_tail(rhs_var
);
1420 ir_dereference
*const rhs_var_ref
=
1421 new(ctx
) ir_dereference_variable(rhs_var
);
1422 ir_instruction
*const inst
=
1423 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1424 instructions
->push_tail(inst
);
1426 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1427 var
->type
->vector_elements
);
1428 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1429 var
->type
->matrix_columns
);
1431 unsigned swiz
[4] = { 0, 0, 0, 0 };
1432 for (unsigned i
= 1; i
< last_row
; i
++)
1435 const unsigned write_mask
= (1U << last_row
) - 1;
1437 for (unsigned i
= 0; i
< last_col
; i
++) {
1438 ir_dereference
*const lhs
=
1439 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1440 ir_rvalue
*const rhs_col
=
1441 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1443 /* If one matrix has columns that are smaller than the columns of the
1444 * other matrix, wrap the column access of the larger with a swizzle
1445 * so that the LHS and RHS of the assignment have the same size (and
1446 * therefore have the same type).
1448 * It would be perfectly valid to unconditionally generate the
1449 * swizzles, this this will typically result in a more compact IR tree.
1452 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1453 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1458 ir_instruction
*inst
=
1459 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1460 instructions
->push_tail(inst
);
1463 const unsigned cols
= type
->matrix_columns
;
1464 const unsigned rows
= type
->vector_elements
;
1465 unsigned remaining_slots
= rows
* cols
;
1466 unsigned col_idx
= 0;
1467 unsigned row_idx
= 0;
1469 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1470 unsigned rhs_components
= rhs
->type
->components();
1471 unsigned rhs_base
= 0;
1473 if (remaining_slots
== 0)
1476 /* Since the parameter might be used in the RHS of two assignments,
1477 * generate a temporary and copy the paramter there.
1479 ir_variable
*rhs_var
=
1480 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1481 instructions
->push_tail(rhs_var
);
1483 ir_dereference
*rhs_var_ref
=
1484 new(ctx
) ir_dereference_variable(rhs_var
);
1485 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1486 instructions
->push_tail(inst
);
1489 /* Assign the current parameter to as many components of the matrix
1492 * NOTE: A single vector parameter can span two matrix columns. A
1493 * single vec4, for example, can completely fill a mat2.
1495 unsigned count
= MIN2(rows
- row_idx
,
1496 rhs_components
- rhs_base
);
1498 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1499 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1504 instructions
->push_tail(inst
);
1507 remaining_slots
-= count
;
1509 /* Sometimes, there is still data left in the parameters and
1510 * components left to be set in the destination but in other
1513 if (row_idx
>= rows
) {
1517 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1521 return new(ctx
) ir_dereference_variable(var
);
1526 emit_inline_record_constructor(const glsl_type
*type
,
1527 exec_list
*instructions
,
1528 exec_list
*parameters
,
1531 ir_variable
*const var
=
1532 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1533 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1535 instructions
->push_tail(var
);
1537 exec_node
*node
= parameters
->head
;
1538 for (unsigned i
= 0; i
< type
->length
; i
++) {
1539 assert(!node
->is_tail_sentinel());
1541 ir_dereference
*const lhs
=
1542 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1543 type
->fields
.structure
[i
].name
);
1545 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1546 assert(rhs
!= NULL
);
1548 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1550 instructions
->push_tail(assign
);
1559 process_record_constructor(exec_list
*instructions
,
1560 const glsl_type
*constructor_type
,
1561 YYLTYPE
*loc
, exec_list
*parameters
,
1562 struct _mesa_glsl_parse_state
*state
)
1565 exec_list actual_parameters
;
1567 process_parameters(instructions
, &actual_parameters
,
1570 exec_node
*node
= actual_parameters
.head
;
1571 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1572 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1574 if (node
->is_tail_sentinel()) {
1575 _mesa_glsl_error(loc
, state
,
1576 "insufficient parameters to constructor for `%s'",
1577 constructor_type
->name
);
1578 return ir_rvalue::error_value(ctx
);
1581 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1583 node
->replace_with(ir
);
1585 _mesa_glsl_error(loc
, state
,
1586 "parameter type mismatch in constructor for `%s.%s' "
1588 constructor_type
->name
,
1589 constructor_type
->fields
.structure
[i
].name
,
1591 constructor_type
->fields
.structure
[i
].type
->name
);
1592 return ir_rvalue::error_value(ctx
);;
1598 if (!node
->is_tail_sentinel()) {
1599 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1600 "for `%s'", constructor_type
->name
);
1601 return ir_rvalue::error_value(ctx
);
1604 ir_rvalue
*const constant
=
1605 constant_record_constructor(constructor_type
, &actual_parameters
,
1608 return (constant
!= NULL
)
1610 : emit_inline_record_constructor(constructor_type
, instructions
,
1611 &actual_parameters
, state
);
1615 ast_function_expression::handle_method(exec_list
*instructions
,
1616 struct _mesa_glsl_parse_state
*state
)
1618 const ast_expression
*field
= subexpressions
[0];
1622 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1623 YYLTYPE loc
= get_location();
1624 state
->check_version(120, 300, &loc
, "methods not supported");
1627 method
= field
->primary_expression
.identifier
;
1629 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1630 if (strcmp(method
, "length") == 0) {
1631 if (!this->expressions
.is_empty()) {
1632 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1636 if (op
->type
->is_array()) {
1637 if (op
->type
->is_unsized_array()) {
1638 if (!state
->has_shader_storage_buffer_objects()) {
1639 _mesa_glsl_error(&loc
, state
, "length called on unsized array"
1640 " only available with "
1641 "ARB_shader_storage_buffer_object");
1643 /* Calculate length of an unsized array in run-time */
1644 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
, op
);
1646 result
= new(ctx
) ir_constant(op
->type
->array_size());
1648 } else if (op
->type
->is_vector()) {
1649 if (state
->ARB_shading_language_420pack_enable
) {
1650 /* .length() returns int. */
1651 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1653 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1654 "with ARB_shading_language_420pack");
1657 } else if (op
->type
->is_matrix()) {
1658 if (state
->ARB_shading_language_420pack_enable
) {
1659 /* .length() returns int. */
1660 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1662 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1663 "with ARB_shading_language_420pack");
1667 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1671 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1676 return ir_rvalue::error_value(ctx
);
1680 ast_function_expression::hir(exec_list
*instructions
,
1681 struct _mesa_glsl_parse_state
*state
)
1684 /* There are three sorts of function calls.
1686 * 1. constructors - The first subexpression is an ast_type_specifier.
1687 * 2. methods - Only the .length() method of array types.
1688 * 3. functions - Calls to regular old functions.
1691 if (is_constructor()) {
1692 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1693 YYLTYPE loc
= type
->get_location();
1696 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1698 /* constructor_type can be NULL if a variable with the same name as the
1699 * structure has come into scope.
1701 if (constructor_type
== NULL
) {
1702 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1703 "may be shadowed by a variable with the same name)",
1705 return ir_rvalue::error_value(ctx
);
1709 /* Constructors for opaque types are illegal.
1711 if (constructor_type
->contains_opaque()) {
1712 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1713 constructor_type
->name
);
1714 return ir_rvalue::error_value(ctx
);
1717 if (constructor_type
->is_array()) {
1718 if (!state
->check_version(120, 300, &loc
,
1719 "array constructors forbidden")) {
1720 return ir_rvalue::error_value(ctx
);
1723 return process_array_constructor(instructions
, constructor_type
,
1724 & loc
, &this->expressions
, state
);
1728 /* There are two kinds of constructor calls. Constructors for arrays and
1729 * structures must have the exact number of arguments with matching types
1730 * in the correct order. These constructors follow essentially the same
1731 * type matching rules as functions.
1733 * Constructors for built-in language types, such as mat4 and vec2, are
1734 * free form. The only requirements are that the parameters must provide
1735 * enough values of the correct scalar type and that no arguments are
1736 * given past the last used argument.
1738 * When using the C-style initializer syntax from GLSL 4.20, constructors
1739 * must have the exact number of arguments with matching types in the
1742 if (constructor_type
->is_record()) {
1743 return process_record_constructor(instructions
, constructor_type
,
1744 &loc
, &this->expressions
,
1748 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1749 return ir_rvalue::error_value(ctx
);
1751 /* Total number of components of the type being constructed. */
1752 const unsigned type_components
= constructor_type
->components();
1754 /* Number of components from parameters that have actually been
1755 * consumed. This is used to perform several kinds of error checking.
1757 unsigned components_used
= 0;
1759 unsigned matrix_parameters
= 0;
1760 unsigned nonmatrix_parameters
= 0;
1761 exec_list actual_parameters
;
1763 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1764 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1766 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1768 * "It is an error to provide extra arguments beyond this
1769 * last used argument."
1771 if (components_used
>= type_components
) {
1772 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1774 constructor_type
->name
);
1775 return ir_rvalue::error_value(ctx
);
1778 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1779 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1780 "non-numeric data type",
1781 constructor_type
->name
);
1782 return ir_rvalue::error_value(ctx
);
1785 /* Count the number of matrix and nonmatrix parameters. This
1786 * is used below to enforce some of the constructor rules.
1788 if (result
->type
->is_matrix())
1789 matrix_parameters
++;
1791 nonmatrix_parameters
++;
1793 actual_parameters
.push_tail(result
);
1794 components_used
+= result
->type
->components();
1797 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1799 * "It is an error to construct matrices from other matrices. This
1800 * is reserved for future use."
1802 if (matrix_parameters
> 0
1803 && constructor_type
->is_matrix()
1804 && !state
->check_version(120, 100, &loc
,
1805 "cannot construct `%s' from a matrix",
1806 constructor_type
->name
)) {
1807 return ir_rvalue::error_value(ctx
);
1810 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1812 * "If a matrix argument is given to a matrix constructor, it is
1813 * an error to have any other arguments."
1815 if ((matrix_parameters
> 0)
1816 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1817 && constructor_type
->is_matrix()) {
1818 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1819 "matrix must be only parameter",
1820 constructor_type
->name
);
1821 return ir_rvalue::error_value(ctx
);
1824 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1826 * "In these cases, there must be enough components provided in the
1827 * arguments to provide an initializer for every component in the
1828 * constructed value."
1830 if (components_used
< type_components
&& components_used
!= 1
1831 && matrix_parameters
== 0) {
1832 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1834 constructor_type
->name
);
1835 return ir_rvalue::error_value(ctx
);
1838 /* Matrices can never be consumed as is by any constructor but matrix
1839 * constructors. If the constructor type is not matrix, always break the
1840 * matrix up into a series of column vectors.
1842 if (!constructor_type
->is_matrix()) {
1843 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
1844 if (!matrix
->type
->is_matrix())
1847 /* Create a temporary containing the matrix. */
1848 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1850 instructions
->push_tail(var
);
1851 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1852 ir_dereference_variable(var
), matrix
, NULL
));
1853 var
->constant_value
= matrix
->constant_expression_value();
1855 /* Replace the matrix with dereferences of its columns. */
1856 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1857 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1858 new(ctx
) ir_constant(i
)));
1864 bool all_parameters_are_constant
= true;
1866 /* Type cast each parameter and, if possible, fold constants.*/
1867 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1868 const glsl_type
*desired_type
=
1869 glsl_type::get_instance(constructor_type
->base_type
,
1870 ir
->type
->vector_elements
,
1871 ir
->type
->matrix_columns
);
1872 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1874 /* Attempt to convert the parameter to a constant valued expression.
1875 * After doing so, track whether or not all the parameters to the
1876 * constructor are trivially constant valued expressions.
1878 ir_rvalue
*const constant
= result
->constant_expression_value();
1880 if (constant
!= NULL
)
1883 all_parameters_are_constant
= false;
1886 ir
->replace_with(result
);
1890 /* If all of the parameters are trivially constant, create a
1891 * constant representing the complete collection of parameters.
1893 if (all_parameters_are_constant
) {
1894 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1895 } else if (constructor_type
->is_scalar()) {
1896 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1898 } else if (constructor_type
->is_vector()) {
1899 return emit_inline_vector_constructor(constructor_type
,
1904 assert(constructor_type
->is_matrix());
1905 return emit_inline_matrix_constructor(constructor_type
,
1910 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
1911 return handle_method(instructions
, state
);
1913 const ast_expression
*id
= subexpressions
[0];
1914 const char *func_name
;
1915 YYLTYPE loc
= get_location();
1916 exec_list actual_parameters
;
1917 ir_variable
*sub_var
= NULL
;
1918 ir_rvalue
*array_idx
= NULL
;
1920 if (id
->oper
== ast_array_index
) {
1921 func_name
= id
->subexpressions
[0]->primary_expression
.identifier
;
1922 array_idx
= id
->subexpressions
[1]->hir(instructions
, state
);
1924 func_name
= id
->primary_expression
.identifier
;
1927 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1930 ir_function_signature
*sig
=
1931 match_function_by_name(func_name
, &actual_parameters
, state
);
1933 ir_rvalue
*value
= NULL
;
1935 sig
= match_subroutine_by_name(func_name
, &actual_parameters
, state
, &sub_var
);
1939 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
1940 value
= ir_rvalue::error_value(ctx
);
1941 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
1942 /* an error has already been emitted */
1943 value
= ir_rvalue::error_value(ctx
);
1945 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
, array_idx
, state
);
1947 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
1950 instructions
->push_tail(tmp
);
1951 value
= new(ctx
) ir_dereference_variable(tmp
);
1958 unreachable("not reached");
1962 ast_aggregate_initializer::hir(exec_list
*instructions
,
1963 struct _mesa_glsl_parse_state
*state
)
1966 YYLTYPE loc
= this->get_location();
1968 if (!this->constructor_type
) {
1969 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
1970 return ir_rvalue::error_value(ctx
);
1972 const glsl_type
*const constructor_type
= this->constructor_type
;
1974 if (!state
->ARB_shading_language_420pack_enable
) {
1975 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
1976 "GL_ARB_shading_language_420pack extension");
1977 return ir_rvalue::error_value(ctx
);
1980 if (constructor_type
->is_array()) {
1981 return process_array_constructor(instructions
, constructor_type
, &loc
,
1982 &this->expressions
, state
);
1985 if (constructor_type
->is_record()) {
1986 return process_record_constructor(instructions
, constructor_type
, &loc
,
1987 &this->expressions
, state
);
1990 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
1991 &this->expressions
, state
);