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 "compiler/glsl_types.h"
28 #include "main/mtypes.h"
29 #include "main/shaderobj.h"
30 #include "builtin_functions.h"
33 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
36 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
37 exec_list
*parameters
,
38 struct _mesa_glsl_parse_state
*state
)
40 void *mem_ctx
= state
;
43 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
44 /* We need to process the parameters first in order to know if we can
45 * raise or not a unitialized warning. Calling set_is_lhs silence the
46 * warning for now. Raising the warning or not will be checked at
47 * verify_parameter_modes.
49 ast
->set_is_lhs(true);
50 ir_rvalue
*result
= ast
->hir(instructions
, state
);
52 /* Error happened processing function parameter */
54 actual_parameters
->push_tail(ir_rvalue::error_value(mem_ctx
));
59 ir_constant
*const constant
=
60 result
->constant_expression_value(mem_ctx
);
65 actual_parameters
->push_tail(result
);
74 * Generate a source prototype for a function signature
76 * \param return_type Return type of the function. May be \c NULL.
77 * \param name Name of the function.
78 * \param parameters List of \c ir_instruction nodes representing the
79 * parameter list for the function. This may be either a
80 * formal (\c ir_variable) or actual (\c ir_rvalue)
81 * parameter list. Only the type is used.
84 * A ralloced string representing the prototype of the function.
87 prototype_string(const glsl_type
*return_type
, const char *name
,
88 exec_list
*parameters
)
92 if (return_type
!= NULL
)
93 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
95 ralloc_asprintf_append(&str
, "%s(", name
);
97 const char *comma
= "";
98 foreach_in_list(const ir_variable
, param
, parameters
) {
99 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
103 ralloc_strcat(&str
, ")");
108 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
109 const ir_variable
*formal
, const ir_variable
*actual
)
112 * From the ARB_shader_image_load_store specification:
114 * "The values of image variables qualified with coherent,
115 * volatile, restrict, readonly, or writeonly may not be passed
116 * to functions whose formal parameters lack such
117 * qualifiers. [...] It is legal to have additional qualifiers
118 * on a formal parameter, but not to have fewer."
120 if (actual
->data
.memory_coherent
&& !formal
->data
.memory_coherent
) {
121 _mesa_glsl_error(loc
, state
,
122 "function call parameter `%s' drops "
123 "`coherent' qualifier", formal
->name
);
127 if (actual
->data
.memory_volatile
&& !formal
->data
.memory_volatile
) {
128 _mesa_glsl_error(loc
, state
,
129 "function call parameter `%s' drops "
130 "`volatile' qualifier", formal
->name
);
134 if (actual
->data
.memory_restrict
&& !formal
->data
.memory_restrict
) {
135 _mesa_glsl_error(loc
, state
,
136 "function call parameter `%s' drops "
137 "`restrict' qualifier", formal
->name
);
141 if (actual
->data
.memory_read_only
&& !formal
->data
.memory_read_only
) {
142 _mesa_glsl_error(loc
, state
,
143 "function call parameter `%s' drops "
144 "`readonly' qualifier", formal
->name
);
148 if (actual
->data
.memory_write_only
&& !formal
->data
.memory_write_only
) {
149 _mesa_glsl_error(loc
, state
,
150 "function call parameter `%s' drops "
151 "`writeonly' qualifier", formal
->name
);
159 verify_first_atomic_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
163 (!var
->is_in_shader_storage_block() &&
164 var
->data
.mode
!= ir_var_shader_shared
)) {
165 _mesa_glsl_error(loc
, state
, "First argument to atomic function "
166 "must be a buffer or shared variable");
173 is_atomic_function(const char *func_name
)
175 return !strcmp(func_name
, "atomicAdd") ||
176 !strcmp(func_name
, "atomicMin") ||
177 !strcmp(func_name
, "atomicMax") ||
178 !strcmp(func_name
, "atomicAnd") ||
179 !strcmp(func_name
, "atomicOr") ||
180 !strcmp(func_name
, "atomicXor") ||
181 !strcmp(func_name
, "atomicExchange") ||
182 !strcmp(func_name
, "atomicCompSwap");
186 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
187 * that 'const_in' formal parameters (an extension in our IR) correspond to
188 * ir_constant actual parameters.
191 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
192 ir_function_signature
*sig
,
193 exec_list
&actual_ir_parameters
,
194 exec_list
&actual_ast_parameters
)
196 exec_node
*actual_ir_node
= actual_ir_parameters
.get_head_raw();
197 exec_node
*actual_ast_node
= actual_ast_parameters
.get_head_raw();
199 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
200 /* The lists must be the same length. */
201 assert(!actual_ir_node
->is_tail_sentinel());
202 assert(!actual_ast_node
->is_tail_sentinel());
204 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
205 const ast_expression
*const actual_ast
=
206 exec_node_data(ast_expression
, actual_ast_node
, link
);
208 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
211 YYLTYPE loc
= actual_ast
->get_location();
213 /* Verify that 'const_in' parameters are ir_constants. */
214 if (formal
->data
.mode
== ir_var_const_in
&&
215 actual
->ir_type
!= ir_type_constant
) {
216 _mesa_glsl_error(&loc
, state
,
217 "parameter `in %s' must be a constant expression",
222 /* Verify that shader_in parameters are shader inputs */
223 if (formal
->data
.must_be_shader_input
) {
224 const ir_rvalue
*val
= actual
;
226 /* GLSL 4.40 allows swizzles, while earlier GLSL versions do not. */
227 if (val
->ir_type
== ir_type_swizzle
) {
228 if (!state
->is_version(440, 0)) {
229 _mesa_glsl_error(&loc
, state
,
230 "parameter `%s` must not be swizzled",
234 val
= ((ir_swizzle
*)val
)->val
;
238 if (val
->ir_type
== ir_type_dereference_array
) {
239 val
= ((ir_dereference_array
*)val
)->array
;
240 } else if (val
->ir_type
== ir_type_dereference_record
&&
242 val
= ((ir_dereference_record
*)val
)->record
;
247 ir_variable
*var
= NULL
;
248 if (const ir_dereference_variable
*deref_var
= val
->as_dereference_variable())
249 var
= deref_var
->variable_referenced();
251 if (!var
|| var
->data
.mode
!= ir_var_shader_in
) {
252 _mesa_glsl_error(&loc
, state
,
253 "parameter `%s` must be a shader input",
258 var
->data
.must_be_shader_input
= 1;
261 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
262 if (formal
->data
.mode
== ir_var_function_out
263 || formal
->data
.mode
== ir_var_function_inout
) {
264 const char *mode
= NULL
;
265 switch (formal
->data
.mode
) {
266 case ir_var_function_out
: mode
= "out"; break;
267 case ir_var_function_inout
: mode
= "inout"; break;
268 default: assert(false); break;
271 /* This AST-based check catches errors like f(i++). The IR-based
272 * is_lvalue() is insufficient because the actual parameter at the
273 * IR-level is just a temporary value, which is an l-value.
275 if (actual_ast
->non_lvalue_description
!= NULL
) {
276 _mesa_glsl_error(&loc
, state
,
277 "function parameter '%s %s' references a %s",
279 actual_ast
->non_lvalue_description
);
283 ir_variable
*var
= actual
->variable_referenced();
285 if (var
&& formal
->data
.mode
== ir_var_function_inout
) {
286 if ((var
->data
.mode
== ir_var_auto
||
287 var
->data
.mode
== ir_var_shader_out
) &&
288 !var
->data
.assigned
&&
289 !is_gl_identifier(var
->name
)) {
290 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
296 var
->data
.assigned
= true;
298 if (var
&& var
->data
.read_only
) {
299 _mesa_glsl_error(&loc
, state
,
300 "function parameter '%s %s' references the "
301 "read-only variable '%s'",
303 actual
->variable_referenced()->name
);
305 } else if (!actual
->is_lvalue(state
)) {
306 _mesa_glsl_error(&loc
, state
,
307 "function parameter '%s %s' is not an lvalue",
312 assert(formal
->data
.mode
== ir_var_function_in
||
313 formal
->data
.mode
== ir_var_const_in
);
314 ir_variable
*var
= actual
->variable_referenced();
316 if ((var
->data
.mode
== ir_var_auto
||
317 var
->data
.mode
== ir_var_shader_out
) &&
318 !var
->data
.assigned
&&
319 !is_gl_identifier(var
->name
)) {
320 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
326 if (formal
->type
->is_image() &&
327 actual
->variable_referenced()) {
328 if (!verify_image_parameter(&loc
, state
, formal
,
329 actual
->variable_referenced()))
333 actual_ir_node
= actual_ir_node
->next
;
334 actual_ast_node
= actual_ast_node
->next
;
337 /* The first parameter of atomic functions must be a buffer variable */
338 const char *func_name
= sig
->function_name();
339 bool is_atomic
= is_atomic_function(func_name
);
341 const ir_rvalue
*const actual
=
342 (ir_rvalue
*) actual_ir_parameters
.get_head_raw();
344 const ast_expression
*const actual_ast
=
345 exec_node_data(ast_expression
,
346 actual_ast_parameters
.get_head_raw(), link
);
347 YYLTYPE loc
= actual_ast
->get_location();
349 if (!verify_first_atomic_parameter(&loc
, state
,
350 actual
->variable_referenced())) {
358 struct copy_index_deref_data
{
360 exec_list
*before_instructions
;
364 copy_index_derefs_to_temps(ir_instruction
*ir
, void *data
)
366 struct copy_index_deref_data
*d
= (struct copy_index_deref_data
*)data
;
368 if (ir
->ir_type
== ir_type_dereference_array
) {
369 ir_dereference_array
*a
= (ir_dereference_array
*) ir
;
370 ir
= a
->array
->as_dereference();
372 ir_rvalue
*idx
= a
->array_index
;
373 ir_variable
*var
= idx
->variable_referenced();
375 /* If the index is read only it cannot change so there is no need
378 if (!var
|| var
->data
.read_only
|| var
->data
.memory_read_only
)
381 ir_variable
*tmp
= new(d
->mem_ctx
) ir_variable(idx
->type
, "idx_tmp",
383 d
->before_instructions
->push_tail(tmp
);
385 ir_dereference_variable
*const deref_tmp_1
=
386 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
387 ir_assignment
*const assignment
=
388 new(d
->mem_ctx
) ir_assignment(deref_tmp_1
,
389 idx
->clone(d
->mem_ctx
, NULL
));
390 d
->before_instructions
->push_tail(assignment
);
392 /* Replace the array index with a dereference of the new temporary */
393 ir_dereference_variable
*const deref_tmp_2
=
394 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
395 a
->array_index
= deref_tmp_2
;
400 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
401 exec_list
*before_instructions
, exec_list
*after_instructions
,
402 bool parameter_is_inout
)
404 ir_expression
*const expr
= actual
->as_expression();
406 /* If the types match exactly and the parameter is not a vector-extract,
407 * nothing needs to be done to fix the parameter.
409 if (formal_type
== actual
->type
410 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
)
411 && actual
->as_dereference_variable())
414 /* An array index could also be an out variable so we need to make a copy
415 * of them before the function is called.
417 if (!actual
->as_dereference_variable()) {
418 struct copy_index_deref_data data
;
419 data
.mem_ctx
= mem_ctx
;
420 data
.before_instructions
= before_instructions
;
422 visit_tree(actual
, copy_index_derefs_to_temps
, &data
);
425 /* To convert an out parameter, we need to create a temporary variable to
426 * hold the value before conversion, and then perform the conversion after
427 * the function call returns.
429 * This has the effect of transforming code like this:
435 * Into IR that's equivalent to this:
439 * int out_parameter_conversion;
440 * f(out_parameter_conversion);
441 * value = float(out_parameter_conversion);
443 * If the parameter is an ir_expression of ir_binop_vector_extract,
444 * additional conversion is needed in the post-call re-write.
447 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
449 before_instructions
->push_tail(tmp
);
451 /* If the parameter is an inout parameter, copy the value of the actual
452 * parameter to the new temporary. Note that no type conversion is allowed
453 * here because inout parameters must match types exactly.
455 if (parameter_is_inout
) {
456 /* Inout parameters should never require conversion, since that would
457 * require an implicit conversion to exist both to and from the formal
458 * parameter type, and there are no bidirectional implicit conversions.
460 assert (actual
->type
== formal_type
);
462 ir_dereference_variable
*const deref_tmp_1
=
463 new(mem_ctx
) ir_dereference_variable(tmp
);
464 ir_assignment
*const assignment
=
465 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
->clone(mem_ctx
, NULL
));
466 before_instructions
->push_tail(assignment
);
469 /* Replace the parameter in the call with a dereference of the new
472 ir_dereference_variable
*const deref_tmp_2
=
473 new(mem_ctx
) ir_dereference_variable(tmp
);
474 actual
->replace_with(deref_tmp_2
);
477 /* Copy the temporary variable to the actual parameter with optional
478 * type conversion applied.
480 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
481 if (actual
->type
!= formal_type
)
482 rhs
= convert_component(rhs
, actual
->type
);
484 ir_rvalue
*lhs
= actual
;
485 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
486 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
488 expr
->operands
[1]->clone(mem_ctx
,
492 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
493 after_instructions
->push_tail(assignment_2
);
497 * Generate a function call.
499 * For non-void functions, this returns a dereference of the temporary
500 * variable which stores the return value for the call. For void functions,
504 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
505 exec_list
*actual_parameters
,
506 ir_variable
*sub_var
,
507 ir_rvalue
*array_idx
,
508 struct _mesa_glsl_parse_state
*state
)
511 exec_list post_call_conversions
;
513 /* Perform implicit conversion of arguments. For out parameters, we need
514 * to place them in a temporary variable and do the conversion after the
515 * call takes place. Since we haven't emitted the call yet, we'll place
516 * the post-call conversions in a temporary exec_list, and emit them later.
518 foreach_two_lists(formal_node
, &sig
->parameters
,
519 actual_node
, actual_parameters
) {
520 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
521 ir_variable
*formal
= (ir_variable
*) formal_node
;
523 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
524 switch (formal
->data
.mode
) {
525 case ir_var_const_in
:
526 case ir_var_function_in
: {
528 = convert_component(actual
, formal
->type
);
529 actual
->replace_with(converted
);
532 case ir_var_function_out
:
533 case ir_var_function_inout
:
534 fix_parameter(ctx
, actual
, formal
->type
,
535 instructions
, &post_call_conversions
,
536 formal
->data
.mode
== ir_var_function_inout
);
539 assert (!"Illegal formal parameter mode");
545 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
547 * "Initializers for const declarations must be formed from literal
548 * values, other const variables (not including function call
549 * paramaters), or expressions of these.
551 * Constructors may be used in such expressions, but function calls may
554 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
556 * "A constant expression is one of
560 * - a built-in function call whose arguments are all constant
561 * expressions, with the exception of the texture lookup
562 * functions, the noise functions, and ftransform. The built-in
563 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
564 * inside an initializer with an argument that is a constant
567 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
569 * "A constant expression is one of
573 * - a built-in function call whose arguments are all constant
574 * expressions, with the exception of the texture lookup
577 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
579 * "A constant expression is one of
583 * - a built-in function call whose arguments are all constant
584 * expressions, with the exception of the texture lookup
585 * functions. The built-in functions dFdx, dFdy, and fwidth must
586 * return 0 when evaluated inside an initializer with an argument
587 * that is a constant expression."
589 * If the function call is a constant expression, don't generate any
590 * instructions; just generate an ir_constant.
592 if (state
->is_version(120, 100) ||
593 state
->ctx
->Const
.AllowGLSLBuiltinConstantExpression
) {
594 ir_constant
*value
= sig
->constant_expression_value(ctx
,
602 ir_dereference_variable
*deref
= NULL
;
603 if (!sig
->return_type
->is_void()) {
604 /* Create a new temporary to hold the return value. */
605 char *const name
= ir_variable::temporaries_allocate_names
606 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
611 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
612 instructions
->push_tail(var
);
616 deref
= new(ctx
) ir_dereference_variable(var
);
619 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
620 actual_parameters
, sub_var
, array_idx
);
621 instructions
->push_tail(call
);
623 /* Also emit any necessary out-parameter conversions. */
624 instructions
->append_list(&post_call_conversions
);
626 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
630 * Given a function name and parameter list, find the matching signature.
632 static ir_function_signature
*
633 match_function_by_name(const char *name
,
634 exec_list
*actual_parameters
,
635 struct _mesa_glsl_parse_state
*state
)
637 ir_function
*f
= state
->symbols
->get_function(name
);
638 ir_function_signature
*local_sig
= NULL
;
639 ir_function_signature
*sig
= NULL
;
641 /* Is the function hidden by a record type constructor? */
642 if (state
->symbols
->get_type(name
))
643 return sig
; /* no match */
645 /* Is the function hidden by a variable (impossible in 1.10)? */
646 if (!state
->symbols
->separate_function_namespace
647 && state
->symbols
->get_variable(name
))
648 return sig
; /* no match */
651 /* In desktop GL, the presence of a user-defined signature hides any
652 * built-in signatures, so we must ignore them. In contrast, in ES2
653 * user-defined signatures add new overloads, so we must consider them.
655 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
657 /* Look for a match in the local shader. If exact, we're done. */
658 bool is_exact
= false;
659 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
660 allow_builtins
, &is_exact
);
668 /* Local shader has no exact candidates; check the built-ins. */
669 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
671 /* if _mesa_glsl_find_builtin_function failed, fall back to the result
672 * of choose_best_inexact_overload() instead. This should only affect
675 return sig
? sig
: local_sig
;
678 static ir_function_signature
*
679 match_subroutine_by_name(const char *name
,
680 exec_list
*actual_parameters
,
681 struct _mesa_glsl_parse_state
*state
,
685 ir_function_signature
*sig
= NULL
;
686 ir_function
*f
, *found
= NULL
;
687 const char *new_name
;
689 bool is_exact
= false;
692 ralloc_asprintf(ctx
, "%s_%s",
693 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
695 var
= state
->symbols
->get_variable(new_name
);
699 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
700 f
= state
->subroutine_types
[i
];
701 if (strcmp(f
->name
, var
->type
->without_array()->name
))
710 sig
= found
->matching_signature(state
, actual_parameters
,
716 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
717 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
718 const ast_expression
*array
, ast_expression
*idx
,
719 const char **function_name
, exec_list
*actual_parameters
)
721 if (array
->oper
== ast_array_index
) {
722 /* This handles arrays of arrays */
723 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
725 array
->subexpressions
[0],
726 array
->subexpressions
[1],
729 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
731 YYLTYPE index_loc
= idx
->get_location();
732 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
733 outer_array_idx
, loc
,
736 ir_variable
*sub_var
= NULL
;
737 *function_name
= array
->primary_expression
.identifier
;
739 if (!match_subroutine_by_name(*function_name
, actual_parameters
,
741 _mesa_glsl_error(&loc
, state
, "Unknown subroutine `%s'",
743 *function_name
= NULL
; /* indicate error condition to caller */
747 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
748 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
753 function_exists(_mesa_glsl_parse_state
*state
,
754 struct glsl_symbol_table
*symbols
, const char *name
)
756 ir_function
*f
= symbols
->get_function(name
);
758 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
759 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
768 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
774 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
775 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
778 char *str
= prototype_string(sig
->return_type
, f
->name
,
780 _mesa_glsl_error(loc
, state
, " %s", str
);
786 * Raise a "no matching function" error, listing all possible overloads the
787 * compiler considered so developers can figure out what went wrong.
790 no_matching_function_error(const char *name
,
792 exec_list
*actual_parameters
,
793 _mesa_glsl_parse_state
*state
)
795 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
797 if (!function_exists(state
, state
->symbols
, name
)
798 && (!state
->uses_builtin_functions
799 || !function_exists(state
, sh
->symbols
, name
))) {
800 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
802 char *str
= prototype_string(NULL
, name
, actual_parameters
);
803 _mesa_glsl_error(loc
, state
,
804 "no matching function for call to `%s';"
809 print_function_prototypes(state
, loc
,
810 state
->symbols
->get_function(name
));
812 if (state
->uses_builtin_functions
) {
813 print_function_prototypes(state
, loc
,
814 sh
->symbols
->get_function(name
));
820 * Perform automatic type conversion of constructor parameters
822 * This implements the rules in the "Conversion and Scalar Constructors"
823 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
826 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
828 void *ctx
= ralloc_parent(src
);
829 const unsigned a
= desired_type
->base_type
;
830 const unsigned b
= src
->type
->base_type
;
831 ir_expression
*result
= NULL
;
833 if (src
->type
->is_error())
836 assert(a
<= GLSL_TYPE_IMAGE
);
837 assert(b
<= GLSL_TYPE_IMAGE
);
846 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
848 case GLSL_TYPE_FLOAT
:
849 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
852 result
= new(ctx
) ir_expression(ir_unop_i2u
,
853 new(ctx
) ir_expression(ir_unop_b2i
,
856 case GLSL_TYPE_DOUBLE
:
857 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
859 case GLSL_TYPE_UINT64
:
860 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
862 case GLSL_TYPE_INT64
:
863 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
865 case GLSL_TYPE_SAMPLER
:
866 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
868 case GLSL_TYPE_IMAGE
:
869 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
876 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
878 case GLSL_TYPE_FLOAT
:
879 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
882 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
884 case GLSL_TYPE_DOUBLE
:
885 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
887 case GLSL_TYPE_UINT64
:
888 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
890 case GLSL_TYPE_INT64
:
891 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
895 case GLSL_TYPE_FLOAT
:
898 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
901 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
904 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
906 case GLSL_TYPE_DOUBLE
:
907 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
909 case GLSL_TYPE_UINT64
:
910 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
912 case GLSL_TYPE_INT64
:
913 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
920 result
= new(ctx
) ir_expression(ir_unop_i2b
,
921 new(ctx
) ir_expression(ir_unop_u2i
,
925 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
927 case GLSL_TYPE_FLOAT
:
928 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
930 case GLSL_TYPE_DOUBLE
:
931 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
933 case GLSL_TYPE_UINT64
:
934 result
= new(ctx
) ir_expression(ir_unop_i642b
,
935 new(ctx
) ir_expression(ir_unop_u642i64
,
938 case GLSL_TYPE_INT64
:
939 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
943 case GLSL_TYPE_DOUBLE
:
946 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
949 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
952 result
= new(ctx
) ir_expression(ir_unop_f2d
,
953 new(ctx
) ir_expression(ir_unop_b2f
,
956 case GLSL_TYPE_FLOAT
:
957 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
959 case GLSL_TYPE_UINT64
:
960 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
962 case GLSL_TYPE_INT64
:
963 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
967 case GLSL_TYPE_UINT64
:
970 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
973 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
976 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
977 new(ctx
) ir_expression(ir_unop_b2i64
,
980 case GLSL_TYPE_FLOAT
:
981 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
983 case GLSL_TYPE_DOUBLE
:
984 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
986 case GLSL_TYPE_INT64
:
987 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
991 case GLSL_TYPE_INT64
:
994 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
997 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
1000 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
1002 case GLSL_TYPE_FLOAT
:
1003 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
1005 case GLSL_TYPE_DOUBLE
:
1006 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
1008 case GLSL_TYPE_UINT64
:
1009 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
1013 case GLSL_TYPE_SAMPLER
:
1015 case GLSL_TYPE_UINT
:
1017 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
1021 case GLSL_TYPE_IMAGE
:
1023 case GLSL_TYPE_UINT
:
1025 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
1031 assert(result
!= NULL
);
1032 assert(result
->type
== desired_type
);
1034 /* Try constant folding; it may fold in the conversion we just added. */
1035 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
1036 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
1041 * Perform automatic type and constant conversion of constructor parameters
1043 * This implements the rules in the "Implicit Conversions" rules, not the
1044 * "Conversion and Scalar Constructors".
1046 * After attempting the implicit conversion, an attempt to convert into a
1047 * constant valued expression is also done.
1049 * The \c from \c ir_rvalue is converted "in place".
1051 * \param from Operand that is being converted
1052 * \param to Base type the operand will be converted to
1053 * \param state GLSL compiler state
1056 * If the attempt to convert into a constant expression succeeds, \c true is
1057 * returned. Otherwise \c false is returned.
1060 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
1061 struct _mesa_glsl_parse_state
*state
)
1063 void *mem_ctx
= state
;
1064 ir_rvalue
*result
= from
;
1066 if (to
!= from
->type
->base_type
) {
1067 const glsl_type
*desired_type
=
1068 glsl_type::get_instance(to
,
1069 from
->type
->vector_elements
,
1070 from
->type
->matrix_columns
);
1072 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1073 /* Even though convert_component() implements the constructor
1074 * conversion rules (not the implicit conversion rules), its safe
1075 * to use it here because we already checked that the implicit
1076 * conversion is legal.
1078 result
= convert_component(from
, desired_type
);
1082 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
1084 if (constant
!= NULL
)
1087 if (from
!= result
) {
1088 from
->replace_with(result
);
1092 return constant
!= NULL
;
1097 * Dereference a specific component from a scalar, vector, or matrix
1100 dereference_component(ir_rvalue
*src
, unsigned component
)
1102 void *ctx
= ralloc_parent(src
);
1103 assert(component
< src
->type
->components());
1105 /* If the source is a constant, just create a new constant instead of a
1106 * dereference of the existing constant.
1108 ir_constant
*constant
= src
->as_constant();
1110 return new(ctx
) ir_constant(constant
, component
);
1112 if (src
->type
->is_scalar()) {
1114 } else if (src
->type
->is_vector()) {
1115 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1117 assert(src
->type
->is_matrix());
1119 /* Dereference a row of the matrix, then call this function again to get
1120 * a specific element from that row.
1122 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1123 const int r
= component
% src
->type
->column_type()->vector_elements
;
1124 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1125 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1128 col
->type
= src
->type
->column_type();
1130 return dereference_component(col
, r
);
1133 assert(!"Should not get here.");
1139 process_vec_mat_constructor(exec_list
*instructions
,
1140 const glsl_type
*constructor_type
,
1141 YYLTYPE
*loc
, exec_list
*parameters
,
1142 struct _mesa_glsl_parse_state
*state
)
1146 /* The ARB_shading_language_420pack spec says:
1148 * "If an initializer is a list of initializers enclosed in curly braces,
1149 * the variable being declared must be a vector, a matrix, an array, or a
1152 * int i = { 1 }; // illegal, i is not an aggregate"
1154 if (constructor_type
->vector_elements
<= 1) {
1155 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1156 "matrices, arrays, and structs");
1157 return ir_rvalue::error_value(ctx
);
1160 exec_list actual_parameters
;
1161 const unsigned parameter_count
=
1162 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1164 if (parameter_count
== 0
1165 || (constructor_type
->is_vector() &&
1166 constructor_type
->vector_elements
!= parameter_count
)
1167 || (constructor_type
->is_matrix() &&
1168 constructor_type
->matrix_columns
!= parameter_count
)) {
1169 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1170 constructor_type
->is_vector() ? "vector" : "matrix",
1171 constructor_type
->vector_elements
);
1172 return ir_rvalue::error_value(ctx
);
1175 bool all_parameters_are_constant
= true;
1177 /* Type cast each parameter and, if possible, fold constants. */
1178 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1179 /* Apply implicit conversions (not the scalar constructor rules, see the
1180 * spec quote above!) and attempt to convert the parameter to a constant
1181 * valued expression. After doing so, track whether or not all the
1182 * parameters to the constructor are trivially constant valued
1185 all_parameters_are_constant
&=
1186 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1188 if (constructor_type
->is_matrix()) {
1189 if (ir
->type
!= constructor_type
->column_type()) {
1190 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1191 "expected: %s, found %s",
1192 constructor_type
->column_type()->name
,
1194 return ir_rvalue::error_value(ctx
);
1196 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1197 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1198 "expected: %s, found %s",
1199 constructor_type
->get_scalar_type()->name
,
1201 return ir_rvalue::error_value(ctx
);
1205 if (all_parameters_are_constant
)
1206 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1208 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1210 instructions
->push_tail(var
);
1214 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1215 ir_instruction
*assignment
= NULL
;
1217 if (var
->type
->is_matrix()) {
1219 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1220 assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1222 /* use writemask rather than index for vector */
1223 assert(var
->type
->is_vector());
1225 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1226 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1227 (unsigned)(1 << i
));
1230 instructions
->push_tail(assignment
);
1235 return new(ctx
) ir_dereference_variable(var
);
1240 process_array_constructor(exec_list
*instructions
,
1241 const glsl_type
*constructor_type
,
1242 YYLTYPE
*loc
, exec_list
*parameters
,
1243 struct _mesa_glsl_parse_state
*state
)
1246 /* Array constructors come in two forms: sized and unsized. Sized array
1247 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1248 * variables. In this case the number of parameters must exactly match the
1249 * specified size of the array.
1251 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1252 * are vec4 variables. In this case the size of the array being constructed
1253 * is determined by the number of parameters.
1255 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1257 * "There must be exactly the same number of arguments as the size of
1258 * the array being constructed. If no size is present in the
1259 * constructor, then the array is explicitly sized to the number of
1260 * arguments provided. The arguments are assigned in order, starting at
1261 * element 0, to the elements of the constructed array. Each argument
1262 * must be the same type as the element type of the array, or be a type
1263 * that can be converted to the element type of the array according to
1264 * Section 4.1.10 "Implicit Conversions.""
1266 exec_list actual_parameters
;
1267 const unsigned parameter_count
=
1268 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1269 bool is_unsized_array
= constructor_type
->is_unsized_array();
1271 if ((parameter_count
== 0) ||
1272 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1273 const unsigned min_param
= is_unsized_array
1274 ? 1 : constructor_type
->length
;
1276 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1278 is_unsized_array
? "at least" : "exactly",
1279 min_param
, (min_param
<= 1) ? "" : "s");
1280 return ir_rvalue::error_value(ctx
);
1283 if (is_unsized_array
) {
1285 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1287 assert(constructor_type
!= NULL
);
1288 assert(constructor_type
->length
== parameter_count
);
1291 bool all_parameters_are_constant
= true;
1292 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1294 /* Type cast each parameter and, if possible, fold constants. */
1295 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1296 /* Apply implicit conversions (not the scalar constructor rules, see the
1297 * spec quote above!) and attempt to convert the parameter to a constant
1298 * valued expression. After doing so, track whether or not all the
1299 * parameters to the constructor are trivially constant valued
1302 all_parameters_are_constant
&=
1303 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1305 if (constructor_type
->fields
.array
->is_unsized_array()) {
1306 /* As the inner parameters of the constructor are created without
1307 * knowledge of each other we need to check to make sure unsized
1308 * parameters of unsized constructors all end up with the same size.
1310 * e.g we make sure to fail for a constructor like this:
1311 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1312 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1313 * vec4[](vec4(0.0), vec4(1.0)));
1315 if (element_type
->is_unsized_array()) {
1316 /* This is the first parameter so just get the type */
1317 element_type
= ir
->type
;
1318 } else if (element_type
!= ir
->type
) {
1319 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1320 "expected: %s, found %s",
1323 return ir_rvalue::error_value(ctx
);
1325 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1326 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1327 "expected: %s, found %s",
1328 constructor_type
->fields
.array
->name
,
1330 return ir_rvalue::error_value(ctx
);
1332 element_type
= ir
->type
;
1336 if (constructor_type
->fields
.array
->is_unsized_array()) {
1338 glsl_type::get_array_instance(element_type
,
1340 assert(constructor_type
!= NULL
);
1341 assert(constructor_type
->length
== parameter_count
);
1344 if (all_parameters_are_constant
)
1345 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1347 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1349 instructions
->push_tail(var
);
1352 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1353 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1354 new(ctx
) ir_constant(i
));
1356 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1357 instructions
->push_tail(assignment
);
1362 return new(ctx
) ir_dereference_variable(var
);
1367 * Determine if a list consists of a single scalar r-value
1370 single_scalar_parameter(exec_list
*parameters
)
1372 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1373 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1375 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1380 * Generate inline code for a vector constructor
1382 * The generated constructor code will consist of a temporary variable
1383 * declaration of the same type as the constructor. A sequence of assignments
1384 * from constructor parameters to the temporary will follow.
1387 * An \c ir_dereference_variable of the temprorary generated in the constructor
1391 emit_inline_vector_constructor(const glsl_type
*type
,
1392 exec_list
*instructions
,
1393 exec_list
*parameters
,
1396 assert(!parameters
->is_empty());
1398 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1399 instructions
->push_tail(var
);
1401 /* There are three kinds of vector constructors.
1403 * - Construct a vector from a single scalar by replicating that scalar to
1404 * all components of the vector.
1406 * - Construct a vector from at least a matrix. This case should already
1407 * have been taken care of in ast_function_expression::hir by breaking
1408 * down the matrix into a series of column vectors.
1410 * - Construct a vector from an arbirary combination of vectors and
1411 * scalars. The components of the constructor parameters are assigned
1412 * to the vector in order until the vector is full.
1414 const unsigned lhs_components
= type
->components();
1415 if (single_scalar_parameter(parameters
)) {
1416 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1417 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1419 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1420 const unsigned mask
= (1U << lhs_components
) - 1;
1422 assert(rhs
->type
== lhs
->type
);
1424 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1425 instructions
->push_tail(inst
);
1427 unsigned base_component
= 0;
1428 unsigned base_lhs_component
= 0;
1429 ir_constant_data data
;
1430 unsigned constant_mask
= 0, constant_components
= 0;
1432 memset(&data
, 0, sizeof(data
));
1434 foreach_in_list(ir_rvalue
, param
, parameters
) {
1435 unsigned rhs_components
= param
->type
->components();
1437 /* Do not try to assign more components to the vector than it has! */
1438 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1439 rhs_components
= lhs_components
- base_lhs_component
;
1442 const ir_constant
*const c
= param
->as_constant();
1444 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1445 switch (c
->type
->base_type
) {
1446 case GLSL_TYPE_UINT
:
1447 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1450 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1452 case GLSL_TYPE_FLOAT
:
1453 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1455 case GLSL_TYPE_DOUBLE
:
1456 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1458 case GLSL_TYPE_BOOL
:
1459 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1461 case GLSL_TYPE_UINT64
:
1462 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1464 case GLSL_TYPE_INT64
:
1465 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1468 assert(!"Should not get here.");
1473 /* Mask of fields to be written in the assignment. */
1474 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1475 constant_components
+= rhs_components
;
1477 base_component
+= rhs_components
;
1479 /* Advance the component index by the number of components
1480 * that were just assigned.
1482 base_lhs_component
+= rhs_components
;
1485 if (constant_mask
!= 0) {
1486 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1487 const glsl_type
*rhs_type
=
1488 glsl_type::get_instance(var
->type
->base_type
,
1489 constant_components
,
1491 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1493 ir_instruction
*inst
=
1494 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1495 instructions
->push_tail(inst
);
1499 foreach_in_list(ir_rvalue
, param
, parameters
) {
1500 unsigned rhs_components
= param
->type
->components();
1502 /* Do not try to assign more components to the vector than it has! */
1503 if ((rhs_components
+ base_component
) > lhs_components
) {
1504 rhs_components
= lhs_components
- base_component
;
1507 /* If we do not have any components left to copy, break out of the
1508 * loop. This can happen when initializing a vec4 with a mat3 as the
1509 * mat3 would have been broken into a series of column vectors.
1511 if (rhs_components
== 0) {
1515 const ir_constant
*const c
= param
->as_constant();
1517 /* Mask of fields to be written in the assignment. */
1518 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1521 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1523 /* Generate a swizzle so that LHS and RHS sizes match. */
1525 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1527 ir_instruction
*inst
=
1528 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1529 instructions
->push_tail(inst
);
1532 /* Advance the component index by the number of components that were
1535 base_component
+= rhs_components
;
1538 return new(ctx
) ir_dereference_variable(var
);
1543 * Generate assignment of a portion of a vector to a portion of a matrix column
1545 * \param src_base First component of the source to be used in assignment
1546 * \param column Column of destination to be assiged
1547 * \param row_base First component of the destination column to be assigned
1548 * \param count Number of components to be assigned
1551 * \c src_base + \c count must be less than or equal to the number of
1552 * components in the source vector.
1554 static ir_instruction
*
1555 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1556 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1559 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1560 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1563 assert(column_ref
->type
->components() >= (row_base
+ count
));
1564 assert(src
->type
->components() >= (src_base
+ count
));
1566 /* Generate a swizzle that extracts the number of components from the source
1567 * that are to be assigned to the column of the matrix.
1569 if (count
< src
->type
->vector_elements
) {
1570 src
= new(mem_ctx
) ir_swizzle(src
,
1571 src_base
+ 0, src_base
+ 1,
1572 src_base
+ 2, src_base
+ 3,
1576 /* Mask of fields to be written in the assignment. */
1577 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1579 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1584 * Generate inline code for a matrix constructor
1586 * The generated constructor code will consist of a temporary variable
1587 * declaration of the same type as the constructor. A sequence of assignments
1588 * from constructor parameters to the temporary will follow.
1591 * An \c ir_dereference_variable of the temprorary generated in the constructor
1595 emit_inline_matrix_constructor(const glsl_type
*type
,
1596 exec_list
*instructions
,
1597 exec_list
*parameters
,
1600 assert(!parameters
->is_empty());
1602 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1603 instructions
->push_tail(var
);
1605 /* There are three kinds of matrix constructors.
1607 * - Construct a matrix from a single scalar by replicating that scalar to
1608 * along the diagonal of the matrix and setting all other components to
1611 * - Construct a matrix from an arbirary combination of vectors and
1612 * scalars. The components of the constructor parameters are assigned
1613 * to the matrix in column-major order until the matrix is full.
1615 * - Construct a matrix from a single matrix. The source matrix is copied
1616 * to the upper left portion of the constructed matrix, and the remaining
1617 * elements take values from the identity matrix.
1619 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1620 if (single_scalar_parameter(parameters
)) {
1621 /* Assign the scalar to the X component of a vec4, and fill the remaining
1622 * components with zero.
1624 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1625 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1626 ir_variable
*rhs_var
=
1627 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1630 instructions
->push_tail(rhs_var
);
1632 ir_constant_data zero
;
1633 for (unsigned i
= 0; i
< 4; i
++)
1634 if (first_param
->type
->is_float())
1639 ir_instruction
*inst
=
1640 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1641 new(ctx
) ir_constant(rhs_var
->type
, &zero
));
1642 instructions
->push_tail(inst
);
1644 ir_dereference
*const rhs_ref
=
1645 new(ctx
) ir_dereference_variable(rhs_var
);
1647 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1648 instructions
->push_tail(inst
);
1650 /* Assign the temporary vector to each column of the destination matrix
1651 * with a swizzle that puts the X component on the diagonal of the
1652 * matrix. In some cases this may mean that the X component does not
1653 * get assigned into the column at all (i.e., when the matrix has more
1654 * columns than rows).
1656 static const unsigned rhs_swiz
[4][4] = {
1663 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1664 type
->vector_elements
);
1665 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1666 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1667 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1670 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1671 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1672 type
->vector_elements
);
1674 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1675 instructions
->push_tail(inst
);
1678 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1679 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1680 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1683 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1684 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1685 type
->vector_elements
);
1687 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1688 instructions
->push_tail(inst
);
1690 } else if (first_param
->type
->is_matrix()) {
1691 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1693 * "If a matrix is constructed from a matrix, then each component
1694 * (column i, row j) in the result that has a corresponding
1695 * component (column i, row j) in the argument will be initialized
1696 * from there. All other components will be initialized to the
1697 * identity matrix. If a matrix argument is given to a matrix
1698 * constructor, it is an error to have any other arguments."
1700 assert(first_param
->next
->is_tail_sentinel());
1701 ir_rvalue
*const src_matrix
= first_param
;
1703 /* If the source matrix is smaller, pre-initialize the relavent parts of
1704 * the destination matrix to the identity matrix.
1706 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1707 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1709 /* If the source matrix has fewer rows, every column of the
1710 * destination must be initialized. Otherwise only the columns in
1711 * the destination that do not exist in the source must be
1715 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1716 ? 0 : src_matrix
->type
->matrix_columns
;
1718 const glsl_type
*const col_type
= var
->type
->column_type();
1719 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1720 ir_constant_data ident
;
1722 if (!col_type
->is_double()) {
1727 ident
.f
[col
] = 1.0f
;
1736 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1738 ir_rvalue
*const lhs
=
1739 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1741 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
);
1742 instructions
->push_tail(inst
);
1746 /* Assign columns from the source matrix to the destination matrix.
1748 * Since the parameter will be used in the RHS of multiple assignments,
1749 * generate a temporary and copy the paramter there.
1751 ir_variable
*const rhs_var
=
1752 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1754 instructions
->push_tail(rhs_var
);
1756 ir_dereference
*const rhs_var_ref
=
1757 new(ctx
) ir_dereference_variable(rhs_var
);
1758 ir_instruction
*const inst
=
1759 new(ctx
) ir_assignment(rhs_var_ref
, first_param
);
1760 instructions
->push_tail(inst
);
1762 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1763 var
->type
->vector_elements
);
1764 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1765 var
->type
->matrix_columns
);
1767 unsigned swiz
[4] = { 0, 0, 0, 0 };
1768 for (unsigned i
= 1; i
< last_row
; i
++)
1771 const unsigned write_mask
= (1U << last_row
) - 1;
1773 for (unsigned i
= 0; i
< last_col
; i
++) {
1774 ir_dereference
*const lhs
=
1775 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1776 ir_rvalue
*const rhs_col
=
1777 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1779 /* If one matrix has columns that are smaller than the columns of the
1780 * other matrix, wrap the column access of the larger with a swizzle
1781 * so that the LHS and RHS of the assignment have the same size (and
1782 * therefore have the same type).
1784 * It would be perfectly valid to unconditionally generate the
1785 * swizzles, this this will typically result in a more compact IR
1789 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1790 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1795 ir_instruction
*inst
=
1796 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1797 instructions
->push_tail(inst
);
1800 const unsigned cols
= type
->matrix_columns
;
1801 const unsigned rows
= type
->vector_elements
;
1802 unsigned remaining_slots
= rows
* cols
;
1803 unsigned col_idx
= 0;
1804 unsigned row_idx
= 0;
1806 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1807 unsigned rhs_components
= rhs
->type
->components();
1808 unsigned rhs_base
= 0;
1810 if (remaining_slots
== 0)
1813 /* Since the parameter might be used in the RHS of two assignments,
1814 * generate a temporary and copy the paramter there.
1816 ir_variable
*rhs_var
=
1817 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1818 instructions
->push_tail(rhs_var
);
1820 ir_dereference
*rhs_var_ref
=
1821 new(ctx
) ir_dereference_variable(rhs_var
);
1822 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
);
1823 instructions
->push_tail(inst
);
1826 /* Assign the current parameter to as many components of the matrix
1829 * NOTE: A single vector parameter can span two matrix columns. A
1830 * single vec4, for example, can completely fill a mat2.
1832 unsigned count
= MIN2(rows
- row_idx
,
1833 rhs_components
- rhs_base
);
1835 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1836 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1841 instructions
->push_tail(inst
);
1844 remaining_slots
-= count
;
1846 /* Sometimes, there is still data left in the parameters and
1847 * components left to be set in the destination but in other
1850 if (row_idx
>= rows
) {
1854 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1858 return new(ctx
) ir_dereference_variable(var
);
1863 emit_inline_record_constructor(const glsl_type
*type
,
1864 exec_list
*instructions
,
1865 exec_list
*parameters
,
1868 ir_variable
*const var
=
1869 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1870 ir_dereference_variable
*const d
=
1871 new(mem_ctx
) ir_dereference_variable(var
);
1873 instructions
->push_tail(var
);
1875 exec_node
*node
= parameters
->get_head_raw();
1876 for (unsigned i
= 0; i
< type
->length
; i
++) {
1877 assert(!node
->is_tail_sentinel());
1879 ir_dereference
*const lhs
=
1880 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1881 type
->fields
.structure
[i
].name
);
1883 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1884 assert(rhs
!= NULL
);
1886 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
1888 instructions
->push_tail(assign
);
1897 process_record_constructor(exec_list
*instructions
,
1898 const glsl_type
*constructor_type
,
1899 YYLTYPE
*loc
, exec_list
*parameters
,
1900 struct _mesa_glsl_parse_state
*state
)
1903 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1905 * "The arguments to the constructor will be used to set the structure's
1906 * fields, in order, using one argument per field. Each argument must
1907 * be the same type as the field it sets, or be a type that can be
1908 * converted to the field's type according to Section 4.1.10 “Implicit
1911 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1913 * "In all cases, the innermost initializer (i.e., not a list of
1914 * initializers enclosed in curly braces) applied to an object must
1915 * have the same type as the object being initialized or be a type that
1916 * can be converted to the object's type according to section 4.1.10
1917 * "Implicit Conversions". In the latter case, an implicit conversion
1918 * will be done on the initializer before the assignment is done."
1920 exec_list actual_parameters
;
1922 const unsigned parameter_count
=
1923 process_parameters(instructions
, &actual_parameters
, parameters
,
1926 if (parameter_count
!= constructor_type
->length
) {
1927 _mesa_glsl_error(loc
, state
,
1928 "%s parameters in constructor for `%s'",
1929 parameter_count
> constructor_type
->length
1930 ? "too many": "insufficient",
1931 constructor_type
->name
);
1932 return ir_rvalue::error_value(ctx
);
1935 bool all_parameters_are_constant
= true;
1938 /* Type cast each parameter and, if possible, fold constants. */
1939 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1941 const glsl_struct_field
*struct_field
=
1942 &constructor_type
->fields
.structure
[i
];
1944 /* Apply implicit conversions (not the scalar constructor rules, see the
1945 * spec quote above!) and attempt to convert the parameter to a constant
1946 * valued expression. After doing so, track whether or not all the
1947 * parameters to the constructor are trivially constant valued
1950 all_parameters_are_constant
&=
1951 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1954 if (ir
->type
!= struct_field
->type
) {
1955 _mesa_glsl_error(loc
, state
,
1956 "parameter type mismatch in constructor for `%s.%s' "
1958 constructor_type
->name
,
1961 struct_field
->type
->name
);
1962 return ir_rvalue::error_value(ctx
);
1968 if (all_parameters_are_constant
) {
1969 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1971 return emit_inline_record_constructor(constructor_type
, instructions
,
1972 &actual_parameters
, state
);
1977 ast_function_expression::handle_method(exec_list
*instructions
,
1978 struct _mesa_glsl_parse_state
*state
)
1980 const ast_expression
*field
= subexpressions
[0];
1984 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1985 YYLTYPE loc
= get_location();
1986 state
->check_version(120, 300, &loc
, "methods not supported");
1989 method
= field
->primary_expression
.identifier
;
1991 /* This would prevent to raise "uninitialized variable" warnings when
1992 * calling array.length.
1994 field
->subexpressions
[0]->set_is_lhs(true);
1995 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1996 if (strcmp(method
, "length") == 0) {
1997 if (!this->expressions
.is_empty()) {
1998 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
2002 if (op
->type
->is_array()) {
2003 if (op
->type
->is_unsized_array()) {
2004 if (!state
->has_shader_storage_buffer_objects()) {
2005 _mesa_glsl_error(&loc
, state
,
2006 "length called on unsized array"
2007 " only available with"
2008 " ARB_shader_storage_buffer_object");
2010 /* Calculate length of an unsized array in run-time */
2011 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
2014 result
= new(ctx
) ir_constant(op
->type
->array_size());
2016 } else if (op
->type
->is_vector()) {
2017 if (state
->has_420pack()) {
2018 /* .length() returns int. */
2019 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
2021 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2022 " available with ARB_shading_language_420pack");
2025 } else if (op
->type
->is_matrix()) {
2026 if (state
->has_420pack()) {
2027 /* .length() returns int. */
2028 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
2030 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2031 " available with ARB_shading_language_420pack");
2035 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
2039 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
2044 return ir_rvalue::error_value(ctx
);
2047 static inline bool is_valid_constructor(const glsl_type
*type
,
2048 struct _mesa_glsl_parse_state
*state
)
2050 return type
->is_numeric() || type
->is_boolean() ||
2051 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
2055 ast_function_expression::hir(exec_list
*instructions
,
2056 struct _mesa_glsl_parse_state
*state
)
2059 /* There are three sorts of function calls.
2061 * 1. constructors - The first subexpression is an ast_type_specifier.
2062 * 2. methods - Only the .length() method of array types.
2063 * 3. functions - Calls to regular old functions.
2066 if (is_constructor()) {
2067 const ast_type_specifier
*type
=
2068 (ast_type_specifier
*) subexpressions
[0];
2069 YYLTYPE loc
= type
->get_location();
2072 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
2074 /* constructor_type can be NULL if a variable with the same name as the
2075 * structure has come into scope.
2077 if (constructor_type
== NULL
) {
2078 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
2079 "may be shadowed by a variable with the same name)",
2081 return ir_rvalue::error_value(ctx
);
2085 /* Constructors for opaque types are illegal.
2087 * From section 4.1.7 of the ARB_bindless_texture spec:
2089 * "Samplers are represented using 64-bit integer handles, and may be "
2090 * converted to and from 64-bit integers using constructors."
2092 * From section 4.1.X of the ARB_bindless_texture spec:
2094 * "Images are represented using 64-bit integer handles, and may be
2095 * converted to and from 64-bit integers using constructors."
2097 if (constructor_type
->contains_atomic() ||
2098 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2099 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2100 state
->has_bindless() ? "atomic" : "opaque",
2101 constructor_type
->name
);
2102 return ir_rvalue::error_value(ctx
);
2105 if (constructor_type
->is_subroutine()) {
2106 _mesa_glsl_error(& loc
, state
,
2107 "subroutine name cannot be a constructor `%s'",
2108 constructor_type
->name
);
2109 return ir_rvalue::error_value(ctx
);
2112 if (constructor_type
->is_array()) {
2113 if (!state
->check_version(120, 300, &loc
,
2114 "array constructors forbidden")) {
2115 return ir_rvalue::error_value(ctx
);
2118 return process_array_constructor(instructions
, constructor_type
,
2119 & loc
, &this->expressions
, state
);
2123 /* There are two kinds of constructor calls. Constructors for arrays and
2124 * structures must have the exact number of arguments with matching types
2125 * in the correct order. These constructors follow essentially the same
2126 * type matching rules as functions.
2128 * Constructors for built-in language types, such as mat4 and vec2, are
2129 * free form. The only requirements are that the parameters must provide
2130 * enough values of the correct scalar type and that no arguments are
2131 * given past the last used argument.
2133 * When using the C-style initializer syntax from GLSL 4.20, constructors
2134 * must have the exact number of arguments with matching types in the
2137 if (constructor_type
->is_struct()) {
2138 return process_record_constructor(instructions
, constructor_type
,
2139 &loc
, &this->expressions
,
2143 if (!is_valid_constructor(constructor_type
, state
))
2144 return ir_rvalue::error_value(ctx
);
2146 /* Total number of components of the type being constructed. */
2147 const unsigned type_components
= constructor_type
->components();
2149 /* Number of components from parameters that have actually been
2150 * consumed. This is used to perform several kinds of error checking.
2152 unsigned components_used
= 0;
2154 unsigned matrix_parameters
= 0;
2155 unsigned nonmatrix_parameters
= 0;
2156 exec_list actual_parameters
;
2158 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2159 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2161 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2163 * "It is an error to provide extra arguments beyond this
2164 * last used argument."
2166 if (components_used
>= type_components
) {
2167 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2169 constructor_type
->name
);
2170 return ir_rvalue::error_value(ctx
);
2173 if (!is_valid_constructor(result
->type
, state
)) {
2174 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2175 "non-numeric data type",
2176 constructor_type
->name
);
2177 return ir_rvalue::error_value(ctx
);
2180 /* Count the number of matrix and nonmatrix parameters. This
2181 * is used below to enforce some of the constructor rules.
2183 if (result
->type
->is_matrix())
2184 matrix_parameters
++;
2186 nonmatrix_parameters
++;
2188 actual_parameters
.push_tail(result
);
2189 components_used
+= result
->type
->components();
2192 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2194 * "It is an error to construct matrices from other matrices. This
2195 * is reserved for future use."
2197 if (matrix_parameters
> 0
2198 && constructor_type
->is_matrix()
2199 && !state
->check_version(120, 100, &loc
,
2200 "cannot construct `%s' from a matrix",
2201 constructor_type
->name
)) {
2202 return ir_rvalue::error_value(ctx
);
2205 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2207 * "If a matrix argument is given to a matrix constructor, it is
2208 * an error to have any other arguments."
2210 if ((matrix_parameters
> 0)
2211 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2212 && constructor_type
->is_matrix()) {
2213 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2214 "matrix must be only parameter",
2215 constructor_type
->name
);
2216 return ir_rvalue::error_value(ctx
);
2219 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2221 * "In these cases, there must be enough components provided in the
2222 * arguments to provide an initializer for every component in the
2223 * constructed value."
2225 if (components_used
< type_components
&& components_used
!= 1
2226 && matrix_parameters
== 0) {
2227 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2229 constructor_type
->name
);
2230 return ir_rvalue::error_value(ctx
);
2233 /* Matrices can never be consumed as is by any constructor but matrix
2234 * constructors. If the constructor type is not matrix, always break the
2235 * matrix up into a series of column vectors.
2237 if (!constructor_type
->is_matrix()) {
2238 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2239 if (!matrix
->type
->is_matrix())
2242 /* Create a temporary containing the matrix. */
2243 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2245 instructions
->push_tail(var
);
2246 instructions
->push_tail(
2247 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2249 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2251 /* Replace the matrix with dereferences of its columns. */
2252 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2253 matrix
->insert_before(
2254 new (ctx
) ir_dereference_array(var
,
2255 new(ctx
) ir_constant(i
)));
2261 bool all_parameters_are_constant
= true;
2263 /* Type cast each parameter and, if possible, fold constants.*/
2264 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2265 const glsl_type
*desired_type
;
2267 /* From section 5.4.1 of the ARB_bindless_texture spec:
2269 * "In the following four constructors, the low 32 bits of the sampler
2270 * type correspond to the .x component of the uvec2 and the high 32
2271 * bits correspond to the .y component."
2273 * uvec2(any sampler type) // Converts a sampler type to a
2274 * // pair of 32-bit unsigned integers
2275 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2277 * uvec2(any image type) // Converts an image type to a
2278 * // pair of 32-bit unsigned integers
2279 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2282 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2283 /* Convert a sampler/image type to a pair of 32-bit unsigned
2284 * integers as defined by ARB_bindless_texture.
2286 if (constructor_type
!= glsl_type::uvec2_type
) {
2287 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2288 "be converted to a pair of 32-bit unsigned "
2291 desired_type
= glsl_type::uvec2_type
;
2292 } else if (constructor_type
->is_sampler() ||
2293 constructor_type
->is_image()) {
2294 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2295 * type as defined by ARB_bindless_texture.
2297 if (ir
->type
!= glsl_type::uvec2_type
) {
2298 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2299 "be converted from a pair of 32-bit unsigned "
2302 desired_type
= constructor_type
;
2305 glsl_type::get_instance(constructor_type
->base_type
,
2306 ir
->type
->vector_elements
,
2307 ir
->type
->matrix_columns
);
2310 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2312 /* Attempt to convert the parameter to a constant valued expression.
2313 * After doing so, track whether or not all the parameters to the
2314 * constructor are trivially constant valued expressions.
2316 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2318 if (constant
!= NULL
)
2321 all_parameters_are_constant
= false;
2324 ir
->replace_with(result
);
2328 /* If all of the parameters are trivially constant, create a
2329 * constant representing the complete collection of parameters.
2331 if (all_parameters_are_constant
) {
2332 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2333 } else if (constructor_type
->is_scalar()) {
2334 return dereference_component((ir_rvalue
*)
2335 actual_parameters
.get_head_raw(),
2337 } else if (constructor_type
->is_vector()) {
2338 return emit_inline_vector_constructor(constructor_type
,
2343 assert(constructor_type
->is_matrix());
2344 return emit_inline_matrix_constructor(constructor_type
,
2349 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2350 return handle_method(instructions
, state
);
2352 const ast_expression
*id
= subexpressions
[0];
2353 const char *func_name
= NULL
;
2354 YYLTYPE loc
= get_location();
2355 exec_list actual_parameters
;
2356 ir_variable
*sub_var
= NULL
;
2357 ir_rvalue
*array_idx
= NULL
;
2359 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2362 if (id
->oper
== ast_array_index
) {
2363 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2364 id
->subexpressions
[0],
2365 id
->subexpressions
[1], &func_name
,
2366 &actual_parameters
);
2367 } else if (id
->oper
== ast_identifier
) {
2368 func_name
= id
->primary_expression
.identifier
;
2370 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2373 /* an error was emitted earlier */
2375 return ir_rvalue::error_value(ctx
);
2377 ir_function_signature
*sig
=
2378 match_function_by_name(func_name
, &actual_parameters
, state
);
2380 ir_rvalue
*value
= NULL
;
2382 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2387 no_matching_function_error(func_name
, &loc
,
2388 &actual_parameters
, state
);
2389 value
= ir_rvalue::error_value(ctx
);
2390 } else if (!verify_parameter_modes(state
, sig
,
2392 this->expressions
)) {
2393 /* an error has already been emitted */
2394 value
= ir_rvalue::error_value(ctx
);
2395 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2396 /* ftransform refers to global variables, and we don't have any code
2397 * for remapping the variable references in the built-in shader.
2400 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2401 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2402 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2403 new(ctx
) ir_dereference_variable(mvp
),
2404 new(ctx
) ir_dereference_variable(vtx
));
2406 bool is_begin_interlock
= false;
2407 bool is_end_interlock
= false;
2408 if (sig
->is_builtin() &&
2409 state
->stage
== MESA_SHADER_FRAGMENT
&&
2410 state
->ARB_fragment_shader_interlock_enable
) {
2411 is_begin_interlock
= strcmp(func_name
, "beginInvocationInterlockARB") == 0;
2412 is_end_interlock
= strcmp(func_name
, "endInvocationInterlockARB") == 0;
2415 if (sig
->is_builtin() &&
2416 ((state
->stage
== MESA_SHADER_TESS_CTRL
&&
2417 strcmp(func_name
, "barrier") == 0) ||
2418 is_begin_interlock
|| is_end_interlock
)) {
2419 if (state
->current_function
== NULL
||
2420 strcmp(state
->current_function
->function_name(), "main") != 0) {
2421 _mesa_glsl_error(&loc
, state
,
2422 "%s() may only be used in main()", func_name
);
2425 if (state
->found_return
) {
2426 _mesa_glsl_error(&loc
, state
,
2427 "%s() may not be used after return", func_name
);
2430 if (instructions
!= &state
->current_function
->body
) {
2431 _mesa_glsl_error(&loc
, state
,
2432 "%s() may not be used in control flow", func_name
);
2436 /* There can be only one begin/end interlock pair in the function. */
2437 if (is_begin_interlock
) {
2438 if (state
->found_begin_interlock
)
2439 _mesa_glsl_error(&loc
, state
,
2440 "beginInvocationInterlockARB may not be used twice");
2441 state
->found_begin_interlock
= true;
2442 } else if (is_end_interlock
) {
2443 if (!state
->found_begin_interlock
)
2444 _mesa_glsl_error(&loc
, state
,
2445 "endInvocationInterlockARB may not be used "
2446 "before beginInvocationInterlockARB");
2447 if (state
->found_end_interlock
)
2448 _mesa_glsl_error(&loc
, state
,
2449 "endInvocationInterlockARB may not be used twice");
2450 state
->found_end_interlock
= true;
2453 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2456 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2459 instructions
->push_tail(tmp
);
2460 value
= new(ctx
) ir_dereference_variable(tmp
);
2467 unreachable("not reached");
2471 ast_function_expression::has_sequence_subexpression() const
2473 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2474 if (ast
->has_sequence_subexpression())
2482 ast_aggregate_initializer::hir(exec_list
*instructions
,
2483 struct _mesa_glsl_parse_state
*state
)
2486 YYLTYPE loc
= this->get_location();
2488 if (!this->constructor_type
) {
2489 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2490 return ir_rvalue::error_value(ctx
);
2492 const glsl_type
*const constructor_type
= this->constructor_type
;
2494 if (!state
->has_420pack()) {
2495 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2496 "GL_ARB_shading_language_420pack extension");
2497 return ir_rvalue::error_value(ctx
);
2500 if (constructor_type
->is_array()) {
2501 return process_array_constructor(instructions
, constructor_type
, &loc
,
2502 &this->expressions
, state
);
2505 if (constructor_type
->is_struct()) {
2506 return process_record_constructor(instructions
, constructor_type
, &loc
,
2507 &this->expressions
, state
);
2510 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2511 &this->expressions
, state
);