3 * Copyright © 2008, 2009 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
33 #include "glsl_parser_extras.h"
34 #include "glsl_types.h"
35 #include "main/context.h"
38 #pragma warning( disable : 4065 ) // switch statement contains 'default' but no 'case' labels
43 static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
45 _mesa_glsl_error(loc, st, "%s", msg);
49 _mesa_glsl_lex(YYSTYPE *val, YYLTYPE *loc, _mesa_glsl_parse_state *state)
51 return _mesa_glsl_lexer_lex(val, loc, state->scanner);
54 static bool match_layout_qualifier(const char *s1, const char *s2,
55 _mesa_glsl_parse_state *state)
57 /* From the GLSL 1.50 spec, section 4.3.8 (Layout Qualifiers):
59 * "The tokens in any layout-qualifier-id-list ... are not case
60 * sensitive, unless explicitly noted otherwise."
62 * The text "unless explicitly noted otherwise" appears to be
63 * vacuous--no desktop GLSL spec (up through GLSL 4.40) notes
66 * However, the GLSL ES 3.00 spec says, in section 4.3.8 (Layout
69 * "As for other identifiers, they are case sensitive."
71 * So we need to do a case-sensitive or a case-insensitive match,
72 * depending on whether we are compiling for GLSL ES.
75 return strcmp(s1, s2);
77 return strcasecmp(s1, s2);
95 %lex-param {struct _mesa_glsl_parse_state *state}
96 %parse-param {struct _mesa_glsl_parse_state *state}
102 const char *identifier;
104 struct ast_type_qualifier type_qualifier;
107 ast_type_specifier *type_specifier;
108 ast_array_specifier *array_specifier;
109 ast_fully_specified_type *fully_specified_type;
110 ast_function *function;
111 ast_parameter_declarator *parameter_declarator;
112 ast_function_definition *function_definition;
113 ast_compound_statement *compound_statement;
114 ast_expression *expression;
115 ast_declarator_list *declarator_list;
116 ast_struct_specifier *struct_specifier;
117 ast_declaration *declaration;
118 ast_switch_body *switch_body;
119 ast_case_label *case_label;
120 ast_case_label_list *case_label_list;
121 ast_case_statement *case_statement;
122 ast_case_statement_list *case_statement_list;
123 ast_interface_block *interface_block;
127 ast_expression *rest;
128 } for_rest_statement;
131 ast_node *then_statement;
132 ast_node *else_statement;
133 } selection_rest_statement;
136 %token ATTRIBUTE CONST_TOK BOOL_TOK FLOAT_TOK INT_TOK UINT_TOK DOUBLE_TOK
137 %token BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN SWITCH CASE DEFAULT
138 %token BVEC2 BVEC3 BVEC4 IVEC2 IVEC3 IVEC4 UVEC2 UVEC3 UVEC4 VEC2 VEC3 VEC4 DVEC2 DVEC3 DVEC4
139 %token CENTROID IN_TOK OUT_TOK INOUT_TOK UNIFORM VARYING SAMPLE
140 %token NOPERSPECTIVE FLAT SMOOTH
141 %token MAT2X2 MAT2X3 MAT2X4
142 %token MAT3X2 MAT3X3 MAT3X4
143 %token MAT4X2 MAT4X3 MAT4X4
144 %token DMAT2X2 DMAT2X3 DMAT2X4
145 %token DMAT3X2 DMAT3X3 DMAT3X4
146 %token DMAT4X2 DMAT4X3 DMAT4X4
147 %token SAMPLER1D SAMPLER2D SAMPLER3D SAMPLERCUBE SAMPLER1DSHADOW SAMPLER2DSHADOW
148 %token SAMPLERCUBESHADOW SAMPLER1DARRAY SAMPLER2DARRAY SAMPLER1DARRAYSHADOW
149 %token SAMPLER2DARRAYSHADOW SAMPLERCUBEARRAY SAMPLERCUBEARRAYSHADOW
150 %token ISAMPLER1D ISAMPLER2D ISAMPLER3D ISAMPLERCUBE
151 %token ISAMPLER1DARRAY ISAMPLER2DARRAY ISAMPLERCUBEARRAY
152 %token USAMPLER1D USAMPLER2D USAMPLER3D USAMPLERCUBE USAMPLER1DARRAY
153 %token USAMPLER2DARRAY USAMPLERCUBEARRAY
154 %token SAMPLER2DRECT ISAMPLER2DRECT USAMPLER2DRECT SAMPLER2DRECTSHADOW
155 %token SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
156 %token SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
157 %token SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
158 %token SAMPLEREXTERNALOES
159 %token IMAGE1D IMAGE2D IMAGE3D IMAGE2DRECT IMAGECUBE IMAGEBUFFER
160 %token IMAGE1DARRAY IMAGE2DARRAY IMAGECUBEARRAY IMAGE2DMS IMAGE2DMSARRAY
161 %token IIMAGE1D IIMAGE2D IIMAGE3D IIMAGE2DRECT IIMAGECUBE IIMAGEBUFFER
162 %token IIMAGE1DARRAY IIMAGE2DARRAY IIMAGECUBEARRAY IIMAGE2DMS IIMAGE2DMSARRAY
163 %token UIMAGE1D UIMAGE2D UIMAGE3D UIMAGE2DRECT UIMAGECUBE UIMAGEBUFFER
164 %token UIMAGE1DARRAY UIMAGE2DARRAY UIMAGECUBEARRAY UIMAGE2DMS UIMAGE2DMSARRAY
165 %token IMAGE1DSHADOW IMAGE2DSHADOW IMAGE1DARRAYSHADOW IMAGE2DARRAYSHADOW
166 %token COHERENT VOLATILE RESTRICT READONLY WRITEONLY
168 %token STRUCT VOID_TOK WHILE
169 %token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
170 %type <identifier> any_identifier
171 %type <interface_block> instance_name_opt
172 %token <real> FLOATCONSTANT
173 %token <dreal> DOUBLECONSTANT
174 %token <n> INTCONSTANT UINTCONSTANT BOOLCONSTANT
175 %token <identifier> FIELD_SELECTION
176 %token LEFT_OP RIGHT_OP
177 %token INC_OP DEC_OP LE_OP GE_OP EQ_OP NE_OP
178 %token AND_OP OR_OP XOR_OP MUL_ASSIGN DIV_ASSIGN ADD_ASSIGN
179 %token MOD_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN XOR_ASSIGN OR_ASSIGN
181 %token INVARIANT PRECISE
182 %token LOWP MEDIUMP HIGHP SUPERP PRECISION
184 %token VERSION_TOK EXTENSION LINE COLON EOL INTERFACE OUTPUT
185 %token PRAGMA_DEBUG_ON PRAGMA_DEBUG_OFF
186 %token PRAGMA_OPTIMIZE_ON PRAGMA_OPTIMIZE_OFF
187 %token PRAGMA_INVARIANT_ALL
190 /* Reserved words that are not actually used in the grammar.
192 %token ASM CLASS UNION ENUM TYPEDEF TEMPLATE THIS PACKED_TOK GOTO
193 %token INLINE_TOK NOINLINE PUBLIC_TOK STATIC EXTERN EXTERNAL
194 %token LONG_TOK SHORT_TOK HALF FIXED_TOK UNSIGNED INPUT_TOK
195 %token HVEC2 HVEC3 HVEC4 FVEC2 FVEC3 FVEC4
197 %token SIZEOF CAST NAMESPACE USING
198 %token RESOURCE PATCH
203 %token COMMON PARTITION ACTIVE FILTER ROW_MAJOR
205 %type <identifier> variable_identifier
206 %type <node> statement
207 %type <node> statement_list
208 %type <node> simple_statement
209 %type <n> precision_qualifier
210 %type <type_qualifier> type_qualifier
211 %type <type_qualifier> auxiliary_storage_qualifier
212 %type <type_qualifier> storage_qualifier
213 %type <type_qualifier> interpolation_qualifier
214 %type <type_qualifier> layout_qualifier
215 %type <type_qualifier> layout_qualifier_id_list layout_qualifier_id
216 %type <type_qualifier> interface_block_layout_qualifier
217 %type <type_qualifier> memory_qualifier
218 %type <type_qualifier> interface_qualifier
219 %type <type_specifier> type_specifier
220 %type <type_specifier> type_specifier_nonarray
221 %type <array_specifier> array_specifier
222 %type <identifier> basic_type_specifier_nonarray
223 %type <fully_specified_type> fully_specified_type
224 %type <function> function_prototype
225 %type <function> function_header
226 %type <function> function_header_with_parameters
227 %type <function> function_declarator
228 %type <parameter_declarator> parameter_declarator
229 %type <parameter_declarator> parameter_declaration
230 %type <type_qualifier> parameter_qualifier
231 %type <type_qualifier> parameter_direction_qualifier
232 %type <type_specifier> parameter_type_specifier
233 %type <function_definition> function_definition
234 %type <compound_statement> compound_statement_no_new_scope
235 %type <compound_statement> compound_statement
236 %type <node> statement_no_new_scope
237 %type <node> expression_statement
238 %type <expression> expression
239 %type <expression> primary_expression
240 %type <expression> assignment_expression
241 %type <expression> conditional_expression
242 %type <expression> logical_or_expression
243 %type <expression> logical_xor_expression
244 %type <expression> logical_and_expression
245 %type <expression> inclusive_or_expression
246 %type <expression> exclusive_or_expression
247 %type <expression> and_expression
248 %type <expression> equality_expression
249 %type <expression> relational_expression
250 %type <expression> shift_expression
251 %type <expression> additive_expression
252 %type <expression> multiplicative_expression
253 %type <expression> unary_expression
254 %type <expression> constant_expression
255 %type <expression> integer_expression
256 %type <expression> postfix_expression
257 %type <expression> function_call_header_with_parameters
258 %type <expression> function_call_header_no_parameters
259 %type <expression> function_call_header
260 %type <expression> function_call_generic
261 %type <expression> function_call_or_method
262 %type <expression> function_call
263 %type <expression> method_call_generic
264 %type <expression> method_call_header_with_parameters
265 %type <expression> method_call_header_no_parameters
266 %type <expression> method_call_header
267 %type <n> assignment_operator
268 %type <n> unary_operator
269 %type <expression> function_identifier
270 %type <node> external_declaration
271 %type <declarator_list> init_declarator_list
272 %type <declarator_list> single_declaration
273 %type <expression> initializer
274 %type <expression> initializer_list
275 %type <node> declaration
276 %type <node> declaration_statement
277 %type <node> jump_statement
278 %type <node> interface_block
279 %type <interface_block> basic_interface_block
280 %type <struct_specifier> struct_specifier
281 %type <declarator_list> struct_declaration_list
282 %type <declarator_list> struct_declaration
283 %type <declaration> struct_declarator
284 %type <declaration> struct_declarator_list
285 %type <declarator_list> member_list
286 %type <declarator_list> member_declaration
287 %type <node> selection_statement
288 %type <selection_rest_statement> selection_rest_statement
289 %type <node> switch_statement
290 %type <switch_body> switch_body
291 %type <case_label_list> case_label_list
292 %type <case_label> case_label
293 %type <case_statement> case_statement
294 %type <case_statement_list> case_statement_list
295 %type <node> iteration_statement
296 %type <node> condition
297 %type <node> conditionopt
298 %type <node> for_init_statement
299 %type <for_rest_statement> for_rest_statement
300 %type <n> integer_constant
301 %type <node> layout_defaults
307 version_statement extension_statement_list
309 _mesa_glsl_initialize_types(state);
311 external_declaration_list
313 delete state->symbols;
314 state->symbols = new(ralloc_parent(state)) glsl_symbol_table;
315 _mesa_glsl_initialize_types(state);
320 /* blank - no #version specified: defaults are already set */
321 | VERSION_TOK INTCONSTANT EOL
323 state->process_version_directive(&@2, $2, NULL);
328 | VERSION_TOK INTCONSTANT any_identifier EOL
330 state->process_version_directive(&@2, $2, $3);
339 | PRAGMA_DEBUG_OFF EOL
340 | PRAGMA_OPTIMIZE_ON EOL
341 | PRAGMA_OPTIMIZE_OFF EOL
342 | PRAGMA_INVARIANT_ALL EOL
344 /* Pragma invariant(all) cannot be used in a fragment shader.
346 * Page 27 of the GLSL 1.20 spec, Page 53 of the GLSL ES 3.00 spec:
348 * "It is an error to use this pragma in a fragment shader."
350 if (state->is_version(120, 300) &&
351 state->stage == MESA_SHADER_FRAGMENT) {
352 _mesa_glsl_error(& @1, state,
353 "pragma `invariant(all)' cannot be used "
354 "in a fragment shader.");
355 } else if (!state->is_version(120, 100)) {
356 _mesa_glsl_warning(& @1, state,
357 "pragma `invariant(all)' not supported in %s "
358 "(GLSL ES 1.00 or GLSL 1.20 required)",
359 state->get_version_string());
361 state->all_invariant = true;
366 extension_statement_list:
368 | extension_statement_list extension_statement
378 EXTENSION any_identifier COLON any_identifier EOL
380 if (!_mesa_glsl_process_extension($2, & @2, $4, & @4, state)) {
386 external_declaration_list:
389 /* FINISHME: The NULL test is required because pragmas are set to
390 * FINISHME: NULL. (See production rule for external_declaration.)
393 state->translation_unit.push_tail(& $1->link);
395 | external_declaration_list external_declaration
397 /* FINISHME: The NULL test is required because pragmas are set to
398 * FINISHME: NULL. (See production rule for external_declaration.)
401 state->translation_unit.push_tail(& $2->link);
403 | external_declaration_list extension_statement {
404 if (!state->allow_extension_directive_midshader) {
405 _mesa_glsl_error(& @2, state,
406 "#extension directive is not allowed "
407 "in the middle of a shader");
422 $$ = new(ctx) ast_expression(ast_identifier, NULL, NULL, NULL);
423 $$->set_location(@1);
424 $$->primary_expression.identifier = $1;
429 $$ = new(ctx) ast_expression(ast_int_constant, NULL, NULL, NULL);
430 $$->set_location(@1);
431 $$->primary_expression.int_constant = $1;
436 $$ = new(ctx) ast_expression(ast_uint_constant, NULL, NULL, NULL);
437 $$->set_location(@1);
438 $$->primary_expression.uint_constant = $1;
443 $$ = new(ctx) ast_expression(ast_float_constant, NULL, NULL, NULL);
444 $$->set_location(@1);
445 $$->primary_expression.float_constant = $1;
450 $$ = new(ctx) ast_expression(ast_double_constant, NULL, NULL, NULL);
451 $$->set_location(@1);
452 $$->primary_expression.double_constant = $1;
457 $$ = new(ctx) ast_expression(ast_bool_constant, NULL, NULL, NULL);
458 $$->set_location(@1);
459 $$->primary_expression.bool_constant = $1;
469 | postfix_expression '[' integer_expression ']'
472 $$ = new(ctx) ast_expression(ast_array_index, $1, $3, NULL);
473 $$->set_location_range(@1, @4);
479 | postfix_expression '.' any_identifier
482 $$ = new(ctx) ast_expression(ast_field_selection, $1, NULL, NULL);
483 $$->set_location_range(@1, @3);
484 $$->primary_expression.identifier = $3;
486 | postfix_expression INC_OP
489 $$ = new(ctx) ast_expression(ast_post_inc, $1, NULL, NULL);
490 $$->set_location_range(@1, @2);
492 | postfix_expression DEC_OP
495 $$ = new(ctx) ast_expression(ast_post_dec, $1, NULL, NULL);
496 $$->set_location_range(@1, @2);
505 function_call_or_method
508 function_call_or_method:
509 function_call_generic
510 | postfix_expression '.' method_call_generic
513 $$ = new(ctx) ast_expression(ast_field_selection, $1, $3, NULL);
514 $$->set_location_range(@1, @3);
518 function_call_generic:
519 function_call_header_with_parameters ')'
520 | function_call_header_no_parameters ')'
523 function_call_header_no_parameters:
524 function_call_header VOID_TOK
525 | function_call_header
528 function_call_header_with_parameters:
529 function_call_header assignment_expression
532 $$->set_location(@1);
533 $$->expressions.push_tail(& $2->link);
535 | function_call_header_with_parameters ',' assignment_expression
538 $$->set_location(@1);
539 $$->expressions.push_tail(& $3->link);
543 // Grammar Note: Constructors look like functions, but lexical
544 // analysis recognized most of them as keywords. They are now
545 // recognized through "type_specifier".
546 function_call_header:
547 function_identifier '('
554 $$ = new(ctx) ast_function_expression($1);
555 $$->set_location(@1);
557 | variable_identifier
560 ast_expression *callee = new(ctx) ast_expression($1);
561 callee->set_location(@1);
562 $$ = new(ctx) ast_function_expression(callee);
563 $$->set_location(@1);
568 ast_expression *callee = new(ctx) ast_expression($1);
569 callee->set_location(@1);
570 $$ = new(ctx) ast_function_expression(callee);
571 $$->set_location(@1);
576 method_call_header_with_parameters ')'
577 | method_call_header_no_parameters ')'
580 method_call_header_no_parameters:
581 method_call_header VOID_TOK
585 method_call_header_with_parameters:
586 method_call_header assignment_expression
589 $$->set_location(@1);
590 $$->expressions.push_tail(& $2->link);
592 | method_call_header_with_parameters ',' assignment_expression
595 $$->set_location(@1);
596 $$->expressions.push_tail(& $3->link);
600 // Grammar Note: Constructors look like methods, but lexical
601 // analysis recognized most of them as keywords. They are now
602 // recognized through "type_specifier".
604 variable_identifier '('
607 ast_expression *callee = new(ctx) ast_expression($1);
608 callee->set_location(@1);
609 $$ = new(ctx) ast_function_expression(callee);
610 $$->set_location(@1);
614 // Grammar Note: No traditional style type casts.
617 | INC_OP unary_expression
620 $$ = new(ctx) ast_expression(ast_pre_inc, $2, NULL, NULL);
621 $$->set_location(@1);
623 | DEC_OP unary_expression
626 $$ = new(ctx) ast_expression(ast_pre_dec, $2, NULL, NULL);
627 $$->set_location(@1);
629 | unary_operator unary_expression
632 $$ = new(ctx) ast_expression($1, $2, NULL, NULL);
633 $$->set_location_range(@1, @2);
637 // Grammar Note: No '*' or '&' unary ops. Pointers are not supported.
639 '+' { $$ = ast_plus; }
640 | '-' { $$ = ast_neg; }
641 | '!' { $$ = ast_logic_not; }
642 | '~' { $$ = ast_bit_not; }
645 multiplicative_expression:
647 | multiplicative_expression '*' unary_expression
650 $$ = new(ctx) ast_expression_bin(ast_mul, $1, $3);
651 $$->set_location_range(@1, @3);
653 | multiplicative_expression '/' unary_expression
656 $$ = new(ctx) ast_expression_bin(ast_div, $1, $3);
657 $$->set_location_range(@1, @3);
659 | multiplicative_expression '%' unary_expression
662 $$ = new(ctx) ast_expression_bin(ast_mod, $1, $3);
663 $$->set_location_range(@1, @3);
668 multiplicative_expression
669 | additive_expression '+' multiplicative_expression
672 $$ = new(ctx) ast_expression_bin(ast_add, $1, $3);
673 $$->set_location_range(@1, @3);
675 | additive_expression '-' multiplicative_expression
678 $$ = new(ctx) ast_expression_bin(ast_sub, $1, $3);
679 $$->set_location_range(@1, @3);
685 | shift_expression LEFT_OP additive_expression
688 $$ = new(ctx) ast_expression_bin(ast_lshift, $1, $3);
689 $$->set_location_range(@1, @3);
691 | shift_expression RIGHT_OP additive_expression
694 $$ = new(ctx) ast_expression_bin(ast_rshift, $1, $3);
695 $$->set_location_range(@1, @3);
699 relational_expression:
701 | relational_expression '<' shift_expression
704 $$ = new(ctx) ast_expression_bin(ast_less, $1, $3);
705 $$->set_location_range(@1, @3);
707 | relational_expression '>' shift_expression
710 $$ = new(ctx) ast_expression_bin(ast_greater, $1, $3);
711 $$->set_location_range(@1, @3);
713 | relational_expression LE_OP shift_expression
716 $$ = new(ctx) ast_expression_bin(ast_lequal, $1, $3);
717 $$->set_location_range(@1, @3);
719 | relational_expression GE_OP shift_expression
722 $$ = new(ctx) ast_expression_bin(ast_gequal, $1, $3);
723 $$->set_location_range(@1, @3);
728 relational_expression
729 | equality_expression EQ_OP relational_expression
732 $$ = new(ctx) ast_expression_bin(ast_equal, $1, $3);
733 $$->set_location_range(@1, @3);
735 | equality_expression NE_OP relational_expression
738 $$ = new(ctx) ast_expression_bin(ast_nequal, $1, $3);
739 $$->set_location_range(@1, @3);
745 | and_expression '&' equality_expression
748 $$ = new(ctx) ast_expression_bin(ast_bit_and, $1, $3);
749 $$->set_location_range(@1, @3);
753 exclusive_or_expression:
755 | exclusive_or_expression '^' and_expression
758 $$ = new(ctx) ast_expression_bin(ast_bit_xor, $1, $3);
759 $$->set_location_range(@1, @3);
763 inclusive_or_expression:
764 exclusive_or_expression
765 | inclusive_or_expression '|' exclusive_or_expression
768 $$ = new(ctx) ast_expression_bin(ast_bit_or, $1, $3);
769 $$->set_location_range(@1, @3);
773 logical_and_expression:
774 inclusive_or_expression
775 | logical_and_expression AND_OP inclusive_or_expression
778 $$ = new(ctx) ast_expression_bin(ast_logic_and, $1, $3);
779 $$->set_location_range(@1, @3);
783 logical_xor_expression:
784 logical_and_expression
785 | logical_xor_expression XOR_OP logical_and_expression
788 $$ = new(ctx) ast_expression_bin(ast_logic_xor, $1, $3);
789 $$->set_location_range(@1, @3);
793 logical_or_expression:
794 logical_xor_expression
795 | logical_or_expression OR_OP logical_xor_expression
798 $$ = new(ctx) ast_expression_bin(ast_logic_or, $1, $3);
799 $$->set_location_range(@1, @3);
803 conditional_expression:
804 logical_or_expression
805 | logical_or_expression '?' expression ':' assignment_expression
808 $$ = new(ctx) ast_expression(ast_conditional, $1, $3, $5);
809 $$->set_location_range(@1, @5);
813 assignment_expression:
814 conditional_expression
815 | unary_expression assignment_operator assignment_expression
818 $$ = new(ctx) ast_expression($2, $1, $3, NULL);
819 $$->set_location_range(@1, @3);
824 '=' { $$ = ast_assign; }
825 | MUL_ASSIGN { $$ = ast_mul_assign; }
826 | DIV_ASSIGN { $$ = ast_div_assign; }
827 | MOD_ASSIGN { $$ = ast_mod_assign; }
828 | ADD_ASSIGN { $$ = ast_add_assign; }
829 | SUB_ASSIGN { $$ = ast_sub_assign; }
830 | LEFT_ASSIGN { $$ = ast_ls_assign; }
831 | RIGHT_ASSIGN { $$ = ast_rs_assign; }
832 | AND_ASSIGN { $$ = ast_and_assign; }
833 | XOR_ASSIGN { $$ = ast_xor_assign; }
834 | OR_ASSIGN { $$ = ast_or_assign; }
838 assignment_expression
842 | expression ',' assignment_expression
845 if ($1->oper != ast_sequence) {
846 $$ = new(ctx) ast_expression(ast_sequence, NULL, NULL, NULL);
847 $$->set_location_range(@1, @3);
848 $$->expressions.push_tail(& $1->link);
853 $$->expressions.push_tail(& $3->link);
858 conditional_expression
862 function_prototype ';'
864 state->symbols->pop_scope();
867 | init_declarator_list ';'
871 | PRECISION precision_qualifier type_specifier ';'
873 $3->default_precision = $2;
883 function_declarator ')'
888 | function_header_with_parameters
891 function_header_with_parameters:
892 function_header parameter_declaration
895 $$->parameters.push_tail(& $2->link);
897 | function_header_with_parameters ',' parameter_declaration
900 $$->parameters.push_tail(& $3->link);
905 fully_specified_type variable_identifier '('
908 $$ = new(ctx) ast_function();
909 $$->set_location(@2);
910 $$->return_type = $1;
913 state->symbols->add_function(new(state) ir_function($2));
914 state->symbols->push_scope();
918 parameter_declarator:
919 type_specifier any_identifier
922 $$ = new(ctx) ast_parameter_declarator();
923 $$->set_location_range(@1, @2);
924 $$->type = new(ctx) ast_fully_specified_type();
925 $$->type->set_location(@1);
926 $$->type->specifier = $1;
929 | type_specifier any_identifier array_specifier
932 $$ = new(ctx) ast_parameter_declarator();
933 $$->set_location_range(@1, @3);
934 $$->type = new(ctx) ast_fully_specified_type();
935 $$->type->set_location(@1);
936 $$->type->specifier = $1;
938 $$->array_specifier = $3;
942 parameter_declaration:
943 parameter_qualifier parameter_declarator
946 $$->type->qualifier = $1;
948 | parameter_qualifier parameter_type_specifier
951 $$ = new(ctx) ast_parameter_declarator();
952 $$->set_location(@2);
953 $$->type = new(ctx) ast_fully_specified_type();
954 $$->type->set_location_range(@1, @2);
955 $$->type->qualifier = $1;
956 $$->type->specifier = $2;
963 memset(& $$, 0, sizeof($$));
965 | CONST_TOK parameter_qualifier
967 if ($2.flags.q.constant)
968 _mesa_glsl_error(&@1, state, "duplicate const qualifier");
971 $$.flags.q.constant = 1;
973 | PRECISE parameter_qualifier
975 if ($2.flags.q.precise)
976 _mesa_glsl_error(&@1, state, "duplicate precise qualifier");
979 $$.flags.q.precise = 1;
981 | parameter_direction_qualifier parameter_qualifier
983 if (($1.flags.q.in || $1.flags.q.out) && ($2.flags.q.in || $2.flags.q.out))
984 _mesa_glsl_error(&@1, state, "duplicate in/out/inout qualifier");
986 if (!state->ARB_shading_language_420pack_enable && $2.flags.q.constant)
987 _mesa_glsl_error(&@1, state, "in/out/inout must come after const "
991 $$.merge_qualifier(&@1, state, $2);
993 | precision_qualifier parameter_qualifier
995 if ($2.precision != ast_precision_none)
996 _mesa_glsl_error(&@1, state, "duplicate precision qualifier");
998 if (!state->ARB_shading_language_420pack_enable && $2.flags.i != 0)
999 _mesa_glsl_error(&@1, state, "precision qualifiers must come last");
1004 | memory_qualifier parameter_qualifier
1007 $$.merge_qualifier(&@1, state, $2);
1010 parameter_direction_qualifier:
1013 memset(& $$, 0, sizeof($$));
1018 memset(& $$, 0, sizeof($$));
1023 memset(& $$, 0, sizeof($$));
1029 parameter_type_specifier:
1033 init_declarator_list:
1035 | init_declarator_list ',' any_identifier
1038 ast_declaration *decl = new(ctx) ast_declaration($3, NULL, NULL);
1039 decl->set_location(@3);
1042 $$->declarations.push_tail(&decl->link);
1043 state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
1045 | init_declarator_list ',' any_identifier array_specifier
1048 ast_declaration *decl = new(ctx) ast_declaration($3, $4, NULL);
1049 decl->set_location_range(@3, @4);
1052 $$->declarations.push_tail(&decl->link);
1053 state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
1055 | init_declarator_list ',' any_identifier array_specifier '=' initializer
1058 ast_declaration *decl = new(ctx) ast_declaration($3, $4, $6);
1059 decl->set_location_range(@3, @4);
1062 $$->declarations.push_tail(&decl->link);
1063 state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
1065 | init_declarator_list ',' any_identifier '=' initializer
1068 ast_declaration *decl = new(ctx) ast_declaration($3, NULL, $5);
1069 decl->set_location(@3);
1072 $$->declarations.push_tail(&decl->link);
1073 state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
1077 // Grammar Note: No 'enum', or 'typedef'.
1079 fully_specified_type
1082 /* Empty declaration list is valid. */
1083 $$ = new(ctx) ast_declarator_list($1);
1084 $$->set_location(@1);
1086 | fully_specified_type any_identifier
1089 ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
1090 decl->set_location(@2);
1092 $$ = new(ctx) ast_declarator_list($1);
1093 $$->set_location_range(@1, @2);
1094 $$->declarations.push_tail(&decl->link);
1096 | fully_specified_type any_identifier array_specifier
1099 ast_declaration *decl = new(ctx) ast_declaration($2, $3, NULL);
1100 decl->set_location_range(@2, @3);
1102 $$ = new(ctx) ast_declarator_list($1);
1103 $$->set_location_range(@1, @3);
1104 $$->declarations.push_tail(&decl->link);
1106 | fully_specified_type any_identifier array_specifier '=' initializer
1109 ast_declaration *decl = new(ctx) ast_declaration($2, $3, $5);
1110 decl->set_location_range(@2, @3);
1112 $$ = new(ctx) ast_declarator_list($1);
1113 $$->set_location_range(@1, @3);
1114 $$->declarations.push_tail(&decl->link);
1116 | fully_specified_type any_identifier '=' initializer
1119 ast_declaration *decl = new(ctx) ast_declaration($2, NULL, $4);
1120 decl->set_location(@2);
1122 $$ = new(ctx) ast_declarator_list($1);
1123 $$->set_location_range(@1, @2);
1124 $$->declarations.push_tail(&decl->link);
1126 | INVARIANT variable_identifier
1129 ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
1130 decl->set_location(@2);
1132 $$ = new(ctx) ast_declarator_list(NULL);
1133 $$->set_location_range(@1, @2);
1134 $$->invariant = true;
1136 $$->declarations.push_tail(&decl->link);
1138 | PRECISE variable_identifier
1141 ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
1142 decl->set_location(@2);
1144 $$ = new(ctx) ast_declarator_list(NULL);
1145 $$->set_location_range(@1, @2);
1148 $$->declarations.push_tail(&decl->link);
1152 fully_specified_type:
1156 $$ = new(ctx) ast_fully_specified_type();
1157 $$->set_location(@1);
1160 | type_qualifier type_specifier
1163 $$ = new(ctx) ast_fully_specified_type();
1164 $$->set_location_range(@1, @2);
1171 LAYOUT_TOK '(' layout_qualifier_id_list ')'
1177 layout_qualifier_id_list:
1179 | layout_qualifier_id_list ',' layout_qualifier_id
1182 if (!$$.merge_qualifier(& @3, state, $3)) {
1189 INTCONSTANT { $$ = $1; }
1190 | UINTCONSTANT { $$ = $1; }
1193 layout_qualifier_id:
1196 memset(& $$, 0, sizeof($$));
1198 /* Layout qualifiers for ARB_fragment_coord_conventions. */
1199 if (!$$.flags.i && (state->ARB_fragment_coord_conventions_enable ||
1200 state->is_version(150, 0))) {
1201 if (match_layout_qualifier($1, "origin_upper_left", state) == 0) {
1202 $$.flags.q.origin_upper_left = 1;
1203 } else if (match_layout_qualifier($1, "pixel_center_integer",
1205 $$.flags.q.pixel_center_integer = 1;
1208 if ($$.flags.i && state->ARB_fragment_coord_conventions_warn) {
1209 _mesa_glsl_warning(& @1, state,
1210 "GL_ARB_fragment_coord_conventions layout "
1211 "identifier `%s' used", $1);
1215 /* Layout qualifiers for AMD/ARB_conservative_depth. */
1217 (state->AMD_conservative_depth_enable ||
1218 state->ARB_conservative_depth_enable)) {
1219 if (match_layout_qualifier($1, "depth_any", state) == 0) {
1220 $$.flags.q.depth_any = 1;
1221 } else if (match_layout_qualifier($1, "depth_greater", state) == 0) {
1222 $$.flags.q.depth_greater = 1;
1223 } else if (match_layout_qualifier($1, "depth_less", state) == 0) {
1224 $$.flags.q.depth_less = 1;
1225 } else if (match_layout_qualifier($1, "depth_unchanged",
1227 $$.flags.q.depth_unchanged = 1;
1230 if ($$.flags.i && state->AMD_conservative_depth_warn) {
1231 _mesa_glsl_warning(& @1, state,
1232 "GL_AMD_conservative_depth "
1233 "layout qualifier `%s' is used", $1);
1235 if ($$.flags.i && state->ARB_conservative_depth_warn) {
1236 _mesa_glsl_warning(& @1, state,
1237 "GL_ARB_conservative_depth "
1238 "layout qualifier `%s' is used", $1);
1242 /* See also interface_block_layout_qualifier. */
1243 if (!$$.flags.i && state->has_uniform_buffer_objects()) {
1244 if (match_layout_qualifier($1, "std140", state) == 0) {
1245 $$.flags.q.std140 = 1;
1246 } else if (match_layout_qualifier($1, "shared", state) == 0) {
1247 $$.flags.q.shared = 1;
1248 } else if (match_layout_qualifier($1, "column_major", state) == 0) {
1249 $$.flags.q.column_major = 1;
1250 /* "row_major" is a reserved word in GLSL 1.30+. Its token is parsed
1251 * below in the interface_block_layout_qualifier rule.
1253 * It is not a reserved word in GLSL ES 3.00, so it's handled here as
1256 * Also, this takes care of alternate capitalizations of
1257 * "row_major" (which is necessary because layout qualifiers
1258 * are case-insensitive in desktop GLSL).
1260 } else if (match_layout_qualifier($1, "row_major", state) == 0) {
1261 $$.flags.q.row_major = 1;
1262 /* "packed" is a reserved word in GLSL, and its token is
1263 * parsed below in the interface_block_layout_qualifier rule.
1264 * However, we must take care of alternate capitalizations of
1265 * "packed", because layout qualifiers are case-insensitive
1268 } else if (match_layout_qualifier($1, "packed", state) == 0) {
1269 $$.flags.q.packed = 1;
1272 if ($$.flags.i && state->ARB_uniform_buffer_object_warn) {
1273 _mesa_glsl_warning(& @1, state,
1274 "#version 140 / GL_ARB_uniform_buffer_object "
1275 "layout qualifier `%s' is used", $1);
1279 /* Layout qualifiers for GLSL 1.50 geometry shaders. */
1281 static const struct {
1285 { "points", GL_POINTS },
1286 { "lines", GL_LINES },
1287 { "lines_adjacency", GL_LINES_ADJACENCY },
1288 { "line_strip", GL_LINE_STRIP },
1289 { "triangles", GL_TRIANGLES },
1290 { "triangles_adjacency", GL_TRIANGLES_ADJACENCY },
1291 { "triangle_strip", GL_TRIANGLE_STRIP },
1293 for (unsigned i = 0; i < ARRAY_SIZE(map); i++) {
1294 if (match_layout_qualifier($1, map[i].s, state) == 0) {
1295 $$.flags.q.prim_type = 1;
1296 $$.prim_type = map[i].e;
1301 if ($$.flags.i && !state->is_version(150, 0)) {
1302 _mesa_glsl_error(& @1, state, "#version 150 layout "
1303 "qualifier `%s' used", $1);
1307 /* Layout qualifiers for ARB_shader_image_load_store. */
1308 if (state->ARB_shader_image_load_store_enable ||
1309 state->is_version(420, 0)) {
1311 static const struct {
1314 glsl_base_type base_type;
1316 { "rgba32f", GL_RGBA32F, GLSL_TYPE_FLOAT },
1317 { "rgba16f", GL_RGBA16F, GLSL_TYPE_FLOAT },
1318 { "rg32f", GL_RG32F, GLSL_TYPE_FLOAT },
1319 { "rg16f", GL_RG16F, GLSL_TYPE_FLOAT },
1320 { "r11f_g11f_b10f", GL_R11F_G11F_B10F, GLSL_TYPE_FLOAT },
1321 { "r32f", GL_R32F, GLSL_TYPE_FLOAT },
1322 { "r16f", GL_R16F, GLSL_TYPE_FLOAT },
1323 { "rgba32ui", GL_RGBA32UI, GLSL_TYPE_UINT },
1324 { "rgba16ui", GL_RGBA16UI, GLSL_TYPE_UINT },
1325 { "rgb10_a2ui", GL_RGB10_A2UI, GLSL_TYPE_UINT },
1326 { "rgba8ui", GL_RGBA8UI, GLSL_TYPE_UINT },
1327 { "rg32ui", GL_RG32UI, GLSL_TYPE_UINT },
1328 { "rg16ui", GL_RG16UI, GLSL_TYPE_UINT },
1329 { "rg8ui", GL_RG8UI, GLSL_TYPE_UINT },
1330 { "r32ui", GL_R32UI, GLSL_TYPE_UINT },
1331 { "r16ui", GL_R16UI, GLSL_TYPE_UINT },
1332 { "r8ui", GL_R8UI, GLSL_TYPE_UINT },
1333 { "rgba32i", GL_RGBA32I, GLSL_TYPE_INT },
1334 { "rgba16i", GL_RGBA16I, GLSL_TYPE_INT },
1335 { "rgba8i", GL_RGBA8I, GLSL_TYPE_INT },
1336 { "rg32i", GL_RG32I, GLSL_TYPE_INT },
1337 { "rg16i", GL_RG16I, GLSL_TYPE_INT },
1338 { "rg8i", GL_RG8I, GLSL_TYPE_INT },
1339 { "r32i", GL_R32I, GLSL_TYPE_INT },
1340 { "r16i", GL_R16I, GLSL_TYPE_INT },
1341 { "r8i", GL_R8I, GLSL_TYPE_INT },
1342 { "rgba16", GL_RGBA16, GLSL_TYPE_FLOAT },
1343 { "rgb10_a2", GL_RGB10_A2, GLSL_TYPE_FLOAT },
1344 { "rgba8", GL_RGBA8, GLSL_TYPE_FLOAT },
1345 { "rg16", GL_RG16, GLSL_TYPE_FLOAT },
1346 { "rg8", GL_RG8, GLSL_TYPE_FLOAT },
1347 { "r16", GL_R16, GLSL_TYPE_FLOAT },
1348 { "r8", GL_R8, GLSL_TYPE_FLOAT },
1349 { "rgba16_snorm", GL_RGBA16_SNORM, GLSL_TYPE_FLOAT },
1350 { "rgba8_snorm", GL_RGBA8_SNORM, GLSL_TYPE_FLOAT },
1351 { "rg16_snorm", GL_RG16_SNORM, GLSL_TYPE_FLOAT },
1352 { "rg8_snorm", GL_RG8_SNORM, GLSL_TYPE_FLOAT },
1353 { "r16_snorm", GL_R16_SNORM, GLSL_TYPE_FLOAT },
1354 { "r8_snorm", GL_R8_SNORM, GLSL_TYPE_FLOAT }
1357 for (unsigned i = 0; i < ARRAY_SIZE(map); i++) {
1358 if (match_layout_qualifier($1, map[i].name, state) == 0) {
1359 $$.flags.q.explicit_image_format = 1;
1360 $$.image_format = map[i].format;
1361 $$.image_base_type = map[i].base_type;
1368 match_layout_qualifier($1, "early_fragment_tests", state) == 0) {
1369 /* From section 4.4.1.3 of the GLSL 4.50 specification
1370 * (Fragment Shader Inputs):
1372 * "Fragment shaders also allow the following layout
1373 * qualifier on in only (not with variable declarations)
1374 * layout-qualifier-id
1375 * early_fragment_tests
1378 if (state->stage != MESA_SHADER_FRAGMENT) {
1379 _mesa_glsl_error(& @1, state,
1380 "early_fragment_tests layout qualifier only "
1381 "valid in fragment shaders");
1384 $$.flags.q.early_fragment_tests = 1;
1389 _mesa_glsl_error(& @1, state, "unrecognized layout identifier "
1394 | any_identifier '=' integer_constant
1396 memset(& $$, 0, sizeof($$));
1398 if (match_layout_qualifier("location", $1, state) == 0) {
1399 $$.flags.q.explicit_location = 1;
1401 if ($$.flags.q.attribute == 1 &&
1402 state->ARB_explicit_attrib_location_warn) {
1403 _mesa_glsl_warning(& @1, state,
1404 "GL_ARB_explicit_attrib_location layout "
1405 "identifier `%s' used", $1);
1411 _mesa_glsl_error(& @3, state, "invalid location %d specified", $3);
1416 if (match_layout_qualifier("index", $1, state) == 0) {
1417 $$.flags.q.explicit_index = 1;
1422 _mesa_glsl_error(& @3, state, "invalid index %d specified", $3);
1427 if ((state->ARB_shading_language_420pack_enable ||
1428 state->has_atomic_counters()) &&
1429 match_layout_qualifier("binding", $1, state) == 0) {
1430 $$.flags.q.explicit_binding = 1;
1434 if (match_layout_qualifier("set", $1, state) == 0) {
1435 $$.flags.q.vk_set = 1;
1439 if (state->has_atomic_counters() &&
1440 match_layout_qualifier("offset", $1, state) == 0) {
1441 $$.flags.q.explicit_offset = 1;
1445 if (match_layout_qualifier("max_vertices", $1, state) == 0) {
1446 $$.flags.q.max_vertices = 1;
1449 _mesa_glsl_error(& @3, state,
1450 "invalid max_vertices %d specified", $3);
1453 $$.max_vertices = $3;
1454 if (!state->is_version(150, 0)) {
1455 _mesa_glsl_error(& @3, state,
1456 "#version 150 max_vertices qualifier "
1462 if (state->stage == MESA_SHADER_GEOMETRY) {
1463 if (match_layout_qualifier("stream", $1, state) == 0 &&
1464 state->check_explicit_attrib_stream_allowed(& @3)) {
1465 $$.flags.q.stream = 1;
1468 _mesa_glsl_error(& @3, state,
1469 "invalid stream %d specified", $3);
1472 $$.flags.q.explicit_stream = 1;
1478 static const char * const local_size_qualifiers[3] = {
1483 for (int i = 0; i < 3; i++) {
1484 if (match_layout_qualifier(local_size_qualifiers[i], $1,
1487 _mesa_glsl_error(& @3, state,
1488 "invalid %s of %d specified",
1489 local_size_qualifiers[i], $3);
1491 } else if (!state->is_version(430, 0) &&
1492 !state->ARB_compute_shader_enable) {
1493 _mesa_glsl_error(& @3, state,
1494 "%s qualifier requires GLSL 4.30 or "
1495 "ARB_compute_shader",
1496 local_size_qualifiers[i]);
1499 $$.flags.q.local_size |= (1 << i);
1500 $$.local_size[i] = $3;
1506 if (match_layout_qualifier("invocations", $1, state) == 0) {
1507 $$.flags.q.invocations = 1;
1510 _mesa_glsl_error(& @3, state,
1511 "invalid invocations %d specified", $3);
1513 } else if ($3 > MAX_GEOMETRY_SHADER_INVOCATIONS) {
1514 _mesa_glsl_error(& @3, state,
1515 "invocations (%d) exceeds "
1516 "GL_MAX_GEOMETRY_SHADER_INVOCATIONS", $3);
1519 $$.invocations = $3;
1520 if (!state->is_version(400, 0) &&
1521 !state->ARB_gpu_shader5_enable) {
1522 _mesa_glsl_error(& @3, state,
1523 "GL_ARB_gpu_shader5 invocations "
1524 "qualifier specified", $3);
1529 /* If the identifier didn't match any known layout identifiers,
1533 _mesa_glsl_error(& @1, state, "unrecognized layout identifier "
1538 | interface_block_layout_qualifier
1541 /* Layout qualifiers for ARB_uniform_buffer_object. */
1542 if ($$.flags.q.uniform && !state->has_uniform_buffer_objects()) {
1543 _mesa_glsl_error(& @1, state,
1544 "#version 140 / GL_ARB_uniform_buffer_object "
1545 "layout qualifier `%s' is used", $1);
1546 } else if ($$.flags.q.uniform && state->ARB_uniform_buffer_object_warn) {
1547 _mesa_glsl_warning(& @1, state,
1548 "#version 140 / GL_ARB_uniform_buffer_object "
1549 "layout qualifier `%s' is used", $1);
1554 /* This is a separate language rule because we parse these as tokens
1555 * (due to them being reserved keywords) instead of identifiers like
1556 * most qualifiers. See the any_identifier path of
1557 * layout_qualifier_id for the others.
1559 * Note that since layout qualifiers are case-insensitive in desktop
1560 * GLSL, all of these qualifiers need to be handled as identifiers as
1561 * well (by the any_identifier path of layout_qualifier_id).
1563 interface_block_layout_qualifier:
1566 memset(& $$, 0, sizeof($$));
1567 $$.flags.q.row_major = 1;
1571 memset(& $$, 0, sizeof($$));
1572 $$.flags.q.packed = 1;
1576 interpolation_qualifier:
1579 memset(& $$, 0, sizeof($$));
1580 $$.flags.q.smooth = 1;
1584 memset(& $$, 0, sizeof($$));
1585 $$.flags.q.flat = 1;
1589 memset(& $$, 0, sizeof($$));
1590 $$.flags.q.noperspective = 1;
1595 /* Single qualifiers */
1598 memset(& $$, 0, sizeof($$));
1599 $$.flags.q.invariant = 1;
1603 memset(& $$, 0, sizeof($$));
1604 $$.flags.q.precise = 1;
1606 | auxiliary_storage_qualifier
1608 | interpolation_qualifier
1611 | precision_qualifier
1613 memset(&$$, 0, sizeof($$));
1617 /* Multiple qualifiers:
1618 * In GLSL 4.20, these can be specified in any order. In earlier versions,
1619 * they appear in this order (see GLSL 1.50 section 4.7 & comments below):
1621 * invariant interpolation auxiliary storage precision ...or...
1622 * layout storage precision
1624 * Each qualifier's rule ensures that the accumulated qualifiers on the right
1625 * side don't contain any that must appear on the left hand side.
1626 * For example, when processing a storage qualifier, we check that there are
1627 * no auxiliary, interpolation, layout, invariant, or precise qualifiers to the right.
1629 | PRECISE type_qualifier
1631 if ($2.flags.q.precise)
1632 _mesa_glsl_error(&@1, state, "duplicate \"precise\" qualifier");
1635 $$.flags.q.precise = 1;
1637 | INVARIANT type_qualifier
1639 if ($2.flags.q.invariant)
1640 _mesa_glsl_error(&@1, state, "duplicate \"invariant\" qualifier");
1642 if (!state->ARB_shading_language_420pack_enable && $2.flags.q.precise)
1643 _mesa_glsl_error(&@1, state,
1644 "\"invariant\" must come after \"precise\"");
1647 $$.flags.q.invariant = 1;
1649 /* GLSL ES 3.00 spec, section 4.6.1 "The Invariant Qualifier":
1651 * "Only variables output from a shader can be candidates for invariance.
1652 * This includes user-defined output variables and the built-in output
1653 * variables. As only outputs can be declared as invariant, an invariant
1654 * output from one shader stage will still match an input of a subsequent
1655 * stage without the input being declared as invariant."
1657 if (state->es_shader && state->language_version >= 300 && $$.flags.q.in)
1658 _mesa_glsl_error(&@1, state, "invariant qualifiers cannot be used with shader inputs");
1660 | interpolation_qualifier type_qualifier
1662 /* Section 4.3 of the GLSL 1.40 specification states:
1663 * "...qualified with one of these interpolation qualifiers"
1665 * GLSL 1.30 claims to allow "one or more", but insists that:
1666 * "These interpolation qualifiers may only precede the qualifiers in,
1667 * centroid in, out, or centroid out in a declaration."
1669 * ...which means that e.g. smooth can't precede smooth, so there can be
1670 * only one after all, and the 1.40 text is a clarification, not a change.
1672 if ($2.has_interpolation())
1673 _mesa_glsl_error(&@1, state, "duplicate interpolation qualifier");
1675 if (!state->ARB_shading_language_420pack_enable &&
1676 ($2.flags.q.precise || $2.flags.q.invariant)) {
1677 _mesa_glsl_error(&@1, state, "interpolation qualifiers must come "
1678 "after \"precise\" or \"invariant\"");
1682 $$.merge_qualifier(&@1, state, $2);
1684 | layout_qualifier type_qualifier
1686 /* In the absence of ARB_shading_language_420pack, layout qualifiers may
1687 * appear no later than auxiliary storage qualifiers. There is no
1688 * particularly clear spec language mandating this, but in all examples
1689 * the layout qualifier precedes the storage qualifier.
1691 * We allow combinations of layout with interpolation, invariant or
1692 * precise qualifiers since these are useful in ARB_separate_shader_objects.
1693 * There is no clear spec guidance on this either.
1695 if (!state->ARB_shading_language_420pack_enable && $2.has_layout())
1696 _mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
1699 $$.merge_qualifier(&@1, state, $2);
1701 | auxiliary_storage_qualifier type_qualifier
1703 if ($2.has_auxiliary_storage()) {
1704 _mesa_glsl_error(&@1, state,
1705 "duplicate auxiliary storage qualifier (centroid or sample)");
1708 if (!state->ARB_shading_language_420pack_enable &&
1709 ($2.flags.q.precise || $2.flags.q.invariant ||
1710 $2.has_interpolation() || $2.has_layout())) {
1711 _mesa_glsl_error(&@1, state, "auxiliary storage qualifiers must come "
1712 "just before storage qualifiers");
1715 $$.merge_qualifier(&@1, state, $2);
1717 | storage_qualifier type_qualifier
1719 /* Section 4.3 of the GLSL 1.20 specification states:
1720 * "Variable declarations may have a storage qualifier specified..."
1721 * 1.30 clarifies this to "may have one storage qualifier".
1723 if ($2.has_storage())
1724 _mesa_glsl_error(&@1, state, "duplicate storage qualifier");
1726 if (!state->ARB_shading_language_420pack_enable &&
1727 ($2.flags.q.precise || $2.flags.q.invariant || $2.has_interpolation() ||
1728 $2.has_layout() || $2.has_auxiliary_storage())) {
1729 _mesa_glsl_error(&@1, state, "storage qualifiers must come after "
1730 "precise, invariant, interpolation, layout and auxiliary "
1731 "storage qualifiers");
1735 $$.merge_qualifier(&@1, state, $2);
1737 | precision_qualifier type_qualifier
1739 if ($2.precision != ast_precision_none)
1740 _mesa_glsl_error(&@1, state, "duplicate precision qualifier");
1742 if (!state->ARB_shading_language_420pack_enable && $2.flags.i != 0)
1743 _mesa_glsl_error(&@1, state, "precision qualifiers must come last");
1748 | memory_qualifier type_qualifier
1751 $$.merge_qualifier(&@1, state, $2);
1755 auxiliary_storage_qualifier:
1758 memset(& $$, 0, sizeof($$));
1759 $$.flags.q.centroid = 1;
1763 memset(& $$, 0, sizeof($$));
1764 $$.flags.q.sample = 1;
1766 /* TODO: "patch" also goes here someday. */
1771 memset(& $$, 0, sizeof($$));
1772 $$.flags.q.constant = 1;
1776 memset(& $$, 0, sizeof($$));
1777 $$.flags.q.attribute = 1;
1781 memset(& $$, 0, sizeof($$));
1782 $$.flags.q.varying = 1;
1786 memset(& $$, 0, sizeof($$));
1791 memset(& $$, 0, sizeof($$));
1794 if (state->stage == MESA_SHADER_GEOMETRY &&
1795 state->has_explicit_attrib_stream()) {
1796 /* Section 4.3.8.2 (Output Layout Qualifiers) of the GLSL 4.00
1799 * "If the block or variable is declared with the stream
1800 * identifier, it is associated with the specified stream;
1801 * otherwise, it is associated with the current default stream."
1803 $$.flags.q.stream = 1;
1804 $$.flags.q.explicit_stream = 0;
1805 $$.stream = state->out_qualifier->stream;
1810 memset(& $$, 0, sizeof($$));
1811 $$.flags.q.uniform = 1;
1818 memset(& $$, 0, sizeof($$));
1819 $$.flags.q.coherent = 1;
1823 memset(& $$, 0, sizeof($$));
1824 $$.flags.q._volatile = 1;
1828 STATIC_ASSERT(sizeof($$.flags.q) <= sizeof($$.flags.i));
1829 memset(& $$, 0, sizeof($$));
1830 $$.flags.q.restrict_flag = 1;
1834 memset(& $$, 0, sizeof($$));
1835 $$.flags.q.read_only = 1;
1839 memset(& $$, 0, sizeof($$));
1840 $$.flags.q.write_only = 1;
1848 $$ = new(ctx) ast_array_specifier(@1);
1849 $$->set_location_range(@1, @2);
1851 | '[' constant_expression ']'
1854 $$ = new(ctx) ast_array_specifier(@1, $2);
1855 $$->set_location_range(@1, @3);
1857 | array_specifier '[' ']'
1861 if (!state->ARB_arrays_of_arrays_enable) {
1862 _mesa_glsl_error(& @1, state,
1863 "GL_ARB_arrays_of_arrays "
1864 "required for defining arrays of arrays");
1866 _mesa_glsl_error(& @1, state,
1867 "only the outermost array dimension can "
1871 | array_specifier '[' constant_expression ']'
1875 if (!state->ARB_arrays_of_arrays_enable) {
1876 _mesa_glsl_error(& @1, state,
1877 "GL_ARB_arrays_of_arrays "
1878 "required for defining arrays of arrays");
1881 $$->add_dimension($3);
1886 type_specifier_nonarray
1887 | type_specifier_nonarray array_specifier
1890 $$->array_specifier = $2;
1894 type_specifier_nonarray:
1895 basic_type_specifier_nonarray
1898 $$ = new(ctx) ast_type_specifier($1);
1899 $$->set_location(@1);
1904 $$ = new(ctx) ast_type_specifier($1);
1905 $$->set_location(@1);
1910 $$ = new(ctx) ast_type_specifier($1);
1911 $$->set_location(@1);
1915 basic_type_specifier_nonarray:
1916 VOID_TOK { $$ = "void"; }
1917 | FLOAT_TOK { $$ = "float"; }
1918 | DOUBLE_TOK { $$ = "double"; }
1919 | INT_TOK { $$ = "int"; }
1920 | UINT_TOK { $$ = "uint"; }
1921 | BOOL_TOK { $$ = "bool"; }
1922 | VEC2 { $$ = "vec2"; }
1923 | VEC3 { $$ = "vec3"; }
1924 | VEC4 { $$ = "vec4"; }
1925 | BVEC2 { $$ = "bvec2"; }
1926 | BVEC3 { $$ = "bvec3"; }
1927 | BVEC4 { $$ = "bvec4"; }
1928 | IVEC2 { $$ = "ivec2"; }
1929 | IVEC3 { $$ = "ivec3"; }
1930 | IVEC4 { $$ = "ivec4"; }
1931 | UVEC2 { $$ = "uvec2"; }
1932 | UVEC3 { $$ = "uvec3"; }
1933 | UVEC4 { $$ = "uvec4"; }
1934 | DVEC2 { $$ = "dvec2"; }
1935 | DVEC3 { $$ = "dvec3"; }
1936 | DVEC4 { $$ = "dvec4"; }
1937 | MAT2X2 { $$ = "mat2"; }
1938 | MAT2X3 { $$ = "mat2x3"; }
1939 | MAT2X4 { $$ = "mat2x4"; }
1940 | MAT3X2 { $$ = "mat3x2"; }
1941 | MAT3X3 { $$ = "mat3"; }
1942 | MAT3X4 { $$ = "mat3x4"; }
1943 | MAT4X2 { $$ = "mat4x2"; }
1944 | MAT4X3 { $$ = "mat4x3"; }
1945 | MAT4X4 { $$ = "mat4"; }
1946 | DMAT2X2 { $$ = "dmat2"; }
1947 | DMAT2X3 { $$ = "dmat2x3"; }
1948 | DMAT2X4 { $$ = "dmat2x4"; }
1949 | DMAT3X2 { $$ = "dmat3x2"; }
1950 | DMAT3X3 { $$ = "dmat3"; }
1951 | DMAT3X4 { $$ = "dmat3x4"; }
1952 | DMAT4X2 { $$ = "dmat4x2"; }
1953 | DMAT4X3 { $$ = "dmat4x3"; }
1954 | DMAT4X4 { $$ = "dmat4"; }
1955 | SAMPLER1D { $$ = "sampler1D"; }
1956 | SAMPLER2D { $$ = "sampler2D"; }
1957 | SAMPLER2DRECT { $$ = "sampler2DRect"; }
1958 | SAMPLER3D { $$ = "sampler3D"; }
1959 | SAMPLERCUBE { $$ = "samplerCube"; }
1960 | SAMPLEREXTERNALOES { $$ = "samplerExternalOES"; }
1961 | SAMPLER1DSHADOW { $$ = "sampler1DShadow"; }
1962 | SAMPLER2DSHADOW { $$ = "sampler2DShadow"; }
1963 | SAMPLER2DRECTSHADOW { $$ = "sampler2DRectShadow"; }
1964 | SAMPLERCUBESHADOW { $$ = "samplerCubeShadow"; }
1965 | SAMPLER1DARRAY { $$ = "sampler1DArray"; }
1966 | SAMPLER2DARRAY { $$ = "sampler2DArray"; }
1967 | SAMPLER1DARRAYSHADOW { $$ = "sampler1DArrayShadow"; }
1968 | SAMPLER2DARRAYSHADOW { $$ = "sampler2DArrayShadow"; }
1969 | SAMPLERBUFFER { $$ = "samplerBuffer"; }
1970 | SAMPLERCUBEARRAY { $$ = "samplerCubeArray"; }
1971 | SAMPLERCUBEARRAYSHADOW { $$ = "samplerCubeArrayShadow"; }
1972 | ISAMPLER1D { $$ = "isampler1D"; }
1973 | ISAMPLER2D { $$ = "isampler2D"; }
1974 | ISAMPLER2DRECT { $$ = "isampler2DRect"; }
1975 | ISAMPLER3D { $$ = "isampler3D"; }
1976 | ISAMPLERCUBE { $$ = "isamplerCube"; }
1977 | ISAMPLER1DARRAY { $$ = "isampler1DArray"; }
1978 | ISAMPLER2DARRAY { $$ = "isampler2DArray"; }
1979 | ISAMPLERBUFFER { $$ = "isamplerBuffer"; }
1980 | ISAMPLERCUBEARRAY { $$ = "isamplerCubeArray"; }
1981 | USAMPLER1D { $$ = "usampler1D"; }
1982 | USAMPLER2D { $$ = "usampler2D"; }
1983 | USAMPLER2DRECT { $$ = "usampler2DRect"; }
1984 | USAMPLER3D { $$ = "usampler3D"; }
1985 | USAMPLERCUBE { $$ = "usamplerCube"; }
1986 | USAMPLER1DARRAY { $$ = "usampler1DArray"; }
1987 | USAMPLER2DARRAY { $$ = "usampler2DArray"; }
1988 | USAMPLERBUFFER { $$ = "usamplerBuffer"; }
1989 | USAMPLERCUBEARRAY { $$ = "usamplerCubeArray"; }
1990 | SAMPLER2DMS { $$ = "sampler2DMS"; }
1991 | ISAMPLER2DMS { $$ = "isampler2DMS"; }
1992 | USAMPLER2DMS { $$ = "usampler2DMS"; }
1993 | SAMPLER2DMSARRAY { $$ = "sampler2DMSArray"; }
1994 | ISAMPLER2DMSARRAY { $$ = "isampler2DMSArray"; }
1995 | USAMPLER2DMSARRAY { $$ = "usampler2DMSArray"; }
1996 | IMAGE1D { $$ = "image1D"; }
1997 | IMAGE2D { $$ = "image2D"; }
1998 | IMAGE3D { $$ = "image3D"; }
1999 | IMAGE2DRECT { $$ = "image2DRect"; }
2000 | IMAGECUBE { $$ = "imageCube"; }
2001 | IMAGEBUFFER { $$ = "imageBuffer"; }
2002 | IMAGE1DARRAY { $$ = "image1DArray"; }
2003 | IMAGE2DARRAY { $$ = "image2DArray"; }
2004 | IMAGECUBEARRAY { $$ = "imageCubeArray"; }
2005 | IMAGE2DMS { $$ = "image2DMS"; }
2006 | IMAGE2DMSARRAY { $$ = "image2DMSArray"; }
2007 | IIMAGE1D { $$ = "iimage1D"; }
2008 | IIMAGE2D { $$ = "iimage2D"; }
2009 | IIMAGE3D { $$ = "iimage3D"; }
2010 | IIMAGE2DRECT { $$ = "iimage2DRect"; }
2011 | IIMAGECUBE { $$ = "iimageCube"; }
2012 | IIMAGEBUFFER { $$ = "iimageBuffer"; }
2013 | IIMAGE1DARRAY { $$ = "iimage1DArray"; }
2014 | IIMAGE2DARRAY { $$ = "iimage2DArray"; }
2015 | IIMAGECUBEARRAY { $$ = "iimageCubeArray"; }
2016 | IIMAGE2DMS { $$ = "iimage2DMS"; }
2017 | IIMAGE2DMSARRAY { $$ = "iimage2DMSArray"; }
2018 | UIMAGE1D { $$ = "uimage1D"; }
2019 | UIMAGE2D { $$ = "uimage2D"; }
2020 | UIMAGE3D { $$ = "uimage3D"; }
2021 | UIMAGE2DRECT { $$ = "uimage2DRect"; }
2022 | UIMAGECUBE { $$ = "uimageCube"; }
2023 | UIMAGEBUFFER { $$ = "uimageBuffer"; }
2024 | UIMAGE1DARRAY { $$ = "uimage1DArray"; }
2025 | UIMAGE2DARRAY { $$ = "uimage2DArray"; }
2026 | UIMAGECUBEARRAY { $$ = "uimageCubeArray"; }
2027 | UIMAGE2DMS { $$ = "uimage2DMS"; }
2028 | UIMAGE2DMSARRAY { $$ = "uimage2DMSArray"; }
2029 | ATOMIC_UINT { $$ = "atomic_uint"; }
2032 precision_qualifier:
2035 state->check_precision_qualifiers_allowed(&@1);
2036 $$ = ast_precision_high;
2040 state->check_precision_qualifiers_allowed(&@1);
2041 $$ = ast_precision_medium;
2045 state->check_precision_qualifiers_allowed(&@1);
2046 $$ = ast_precision_low;
2051 STRUCT any_identifier '{' struct_declaration_list '}'
2054 $$ = new(ctx) ast_struct_specifier($2, $4);
2055 $$->set_location_range(@2, @5);
2056 state->symbols->add_type($2, glsl_type::void_type);
2058 | STRUCT '{' struct_declaration_list '}'
2061 $$ = new(ctx) ast_struct_specifier(NULL, $3);
2062 $$->set_location_range(@2, @4);
2066 struct_declaration_list:
2070 $1->link.self_link();
2072 | struct_declaration_list struct_declaration
2075 $$->link.insert_before(& $2->link);
2080 fully_specified_type struct_declarator_list ';'
2083 ast_fully_specified_type *const type = $1;
2084 type->set_location(@1);
2086 if (type->qualifier.flags.i != 0)
2087 _mesa_glsl_error(&@1, state,
2088 "only precision qualifiers may be applied to "
2089 "structure members");
2091 $$ = new(ctx) ast_declarator_list(type);
2092 $$->set_location(@2);
2094 $$->declarations.push_degenerate_list_at_head(& $2->link);
2098 struct_declarator_list:
2102 $1->link.self_link();
2104 | struct_declarator_list ',' struct_declarator
2107 $$->link.insert_before(& $3->link);
2115 $$ = new(ctx) ast_declaration($1, NULL, NULL);
2116 $$->set_location(@1);
2118 | any_identifier array_specifier
2121 $$ = new(ctx) ast_declaration($1, $2, NULL);
2122 $$->set_location_range(@1, @2);
2127 assignment_expression
2128 | '{' initializer_list '}'
2132 | '{' initializer_list ',' '}'
2142 $$ = new(ctx) ast_aggregate_initializer();
2143 $$->set_location(@1);
2144 $$->expressions.push_tail(& $1->link);
2146 | initializer_list ',' initializer
2148 $1->expressions.push_tail(& $3->link);
2152 declaration_statement:
2156 // Grammar Note: labeled statements for SWITCH only; 'goto' is not
2159 compound_statement { $$ = (ast_node *) $1; }
2164 declaration_statement
2165 | expression_statement
2166 | selection_statement
2168 | iteration_statement
2176 $$ = new(ctx) ast_compound_statement(true, NULL);
2177 $$->set_location_range(@1, @2);
2181 state->symbols->push_scope();
2186 $$ = new(ctx) ast_compound_statement(true, $3);
2187 $$->set_location_range(@1, @4);
2188 state->symbols->pop_scope();
2192 statement_no_new_scope:
2193 compound_statement_no_new_scope { $$ = (ast_node *) $1; }
2197 compound_statement_no_new_scope:
2201 $$ = new(ctx) ast_compound_statement(false, NULL);
2202 $$->set_location_range(@1, @2);
2204 | '{' statement_list '}'
2207 $$ = new(ctx) ast_compound_statement(false, $2);
2208 $$->set_location_range(@1, @3);
2216 _mesa_glsl_error(& @1, state, "<nil> statement");
2221 $$->link.self_link();
2223 | statement_list statement
2226 _mesa_glsl_error(& @2, state, "<nil> statement");
2230 $$->link.insert_before(& $2->link);
2234 expression_statement:
2238 $$ = new(ctx) ast_expression_statement(NULL);
2239 $$->set_location(@1);
2244 $$ = new(ctx) ast_expression_statement($1);
2245 $$->set_location(@1);
2249 selection_statement:
2250 IF '(' expression ')' selection_rest_statement
2252 $$ = new(state) ast_selection_statement($3, $5.then_statement,
2254 $$->set_location_range(@1, @5);
2258 selection_rest_statement:
2259 statement ELSE statement
2261 $$.then_statement = $1;
2262 $$.else_statement = $3;
2264 | statement %prec THEN
2266 $$.then_statement = $1;
2267 $$.else_statement = NULL;
2274 $$ = (ast_node *) $1;
2276 | fully_specified_type any_identifier '=' initializer
2279 ast_declaration *decl = new(ctx) ast_declaration($2, NULL, $4);
2280 ast_declarator_list *declarator = new(ctx) ast_declarator_list($1);
2281 decl->set_location_range(@2, @4);
2282 declarator->set_location(@1);
2284 declarator->declarations.push_tail(&decl->link);
2290 * switch_statement grammar is based on the syntax described in the body
2291 * of the GLSL spec, not in it's appendix!!!
2294 SWITCH '(' expression ')' switch_body
2296 $$ = new(state) ast_switch_statement($3, $5);
2297 $$->set_location_range(@1, @5);
2304 $$ = new(state) ast_switch_body(NULL);
2305 $$->set_location_range(@1, @2);
2307 | '{' case_statement_list '}'
2309 $$ = new(state) ast_switch_body($2);
2310 $$->set_location_range(@1, @3);
2317 $$ = new(state) ast_case_label($2);
2318 $$->set_location(@2);
2322 $$ = new(state) ast_case_label(NULL);
2323 $$->set_location(@2);
2330 ast_case_label_list *labels = new(state) ast_case_label_list();
2332 labels->labels.push_tail(& $1->link);
2334 $$->set_location(@1);
2336 | case_label_list case_label
2339 $$->labels.push_tail(& $2->link);
2344 case_label_list statement
2346 ast_case_statement *stmts = new(state) ast_case_statement($1);
2347 stmts->set_location(@2);
2349 stmts->stmts.push_tail(& $2->link);
2352 | case_statement statement
2355 $$->stmts.push_tail(& $2->link);
2359 case_statement_list:
2362 ast_case_statement_list *cases= new(state) ast_case_statement_list();
2363 cases->set_location(@1);
2365 cases->cases.push_tail(& $1->link);
2368 | case_statement_list case_statement
2371 $$->cases.push_tail(& $2->link);
2375 iteration_statement:
2376 WHILE '(' condition ')' statement_no_new_scope
2379 $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_while,
2380 NULL, $3, NULL, $5);
2381 $$->set_location_range(@1, @4);
2383 | DO statement WHILE '(' expression ')' ';'
2386 $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_do_while,
2387 NULL, $5, NULL, $2);
2388 $$->set_location_range(@1, @6);
2390 | FOR '(' for_init_statement for_rest_statement ')' statement_no_new_scope
2393 $$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_for,
2394 $3, $4.cond, $4.rest, $6);
2395 $$->set_location_range(@1, @6);
2400 expression_statement
2401 | declaration_statement
2418 | conditionopt ';' expression
2425 // Grammar Note: No 'goto'. Gotos are not supported.
2430 $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_continue, NULL);
2431 $$->set_location(@1);
2436 $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_break, NULL);
2437 $$->set_location(@1);
2442 $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, NULL);
2443 $$->set_location(@1);
2445 | RETURN expression ';'
2448 $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, $2);
2449 $$->set_location_range(@1, @2);
2451 | DISCARD ';' // Fragment shader only.
2454 $$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_discard, NULL);
2455 $$->set_location(@1);
2459 external_declaration:
2460 function_definition { $$ = $1; }
2461 | declaration { $$ = $1; }
2462 | pragma_statement { $$ = NULL; }
2463 | layout_defaults { $$ = $1; }
2466 function_definition:
2467 function_prototype compound_statement_no_new_scope
2470 $$ = new(ctx) ast_function_definition();
2471 $$->set_location_range(@1, @2);
2475 state->symbols->pop_scope();
2479 /* layout_qualifieropt is packed into this rule */
2481 basic_interface_block
2485 | layout_qualifier basic_interface_block
2487 ast_interface_block *block = $2;
2488 if (!block->layout.merge_qualifier(& @1, state, $1)) {
2492 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
2493 ast_type_qualifier& qualifier = member->type->qualifier;
2494 if (qualifier.flags.q.stream && qualifier.stream != block->layout.stream) {
2495 _mesa_glsl_error(& @1, state,
2496 "stream layout qualifier on "
2497 "interface block member does not match "
2498 "the interface block (%d vs %d)",
2499 qualifier.stream, block->layout.stream);
2507 basic_interface_block:
2508 interface_qualifier NEW_IDENTIFIER '{' member_list '}' instance_name_opt ';'
2510 ast_interface_block *const block = $6;
2512 block->block_name = $2;
2513 block->declarations.push_degenerate_list_at_head(& $4->link);
2515 if ($1.flags.q.uniform) {
2516 if (!state->has_uniform_buffer_objects()) {
2517 _mesa_glsl_error(& @1, state,
2518 "#version 140 / GL_ARB_uniform_buffer_object "
2519 "required for defining uniform blocks");
2520 } else if (state->ARB_uniform_buffer_object_warn) {
2521 _mesa_glsl_warning(& @1, state,
2522 "#version 140 / GL_ARB_uniform_buffer_object "
2523 "required for defining uniform blocks");
2526 if (state->es_shader || state->language_version < 150) {
2527 _mesa_glsl_error(& @1, state,
2528 "#version 150 required for using "
2529 "interface blocks");
2533 /* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
2534 * "It is illegal to have an input block in a vertex shader
2535 * or an output block in a fragment shader"
2537 if ((state->stage == MESA_SHADER_VERTEX) && $1.flags.q.in) {
2538 _mesa_glsl_error(& @1, state,
2539 "`in' interface block is not allowed for "
2541 } else if ((state->stage == MESA_SHADER_FRAGMENT) && $1.flags.q.out) {
2542 _mesa_glsl_error(& @1, state,
2543 "`out' interface block is not allowed for "
2544 "a fragment shader");
2547 /* Since block arrays require names, and both features are added in
2548 * the same language versions, we don't have to explicitly
2549 * version-check both things.
2551 if (block->instance_name != NULL) {
2552 state->check_version(150, 300, & @1, "interface blocks with "
2553 "an instance name are not allowed");
2556 uint64_t interface_type_mask;
2557 struct ast_type_qualifier temp_type_qualifier;
2559 /* Get a bitmask containing only the in/out/uniform flags, allowing us
2560 * to ignore other irrelevant flags like interpolation qualifiers.
2562 temp_type_qualifier.flags.i = 0;
2563 temp_type_qualifier.flags.q.uniform = true;
2564 temp_type_qualifier.flags.q.in = true;
2565 temp_type_qualifier.flags.q.out = true;
2566 interface_type_mask = temp_type_qualifier.flags.i;
2568 /* Get the block's interface qualifier. The interface_qualifier
2569 * production rule guarantees that only one bit will be set (and
2570 * it will be in/out/uniform).
2572 uint64_t block_interface_qualifier = $1.flags.i;
2574 block->layout.flags.i |= block_interface_qualifier;
2576 if (state->stage == MESA_SHADER_GEOMETRY &&
2577 state->has_explicit_attrib_stream()) {
2578 /* Assign global layout's stream value. */
2579 block->layout.flags.q.stream = 1;
2580 block->layout.flags.q.explicit_stream = 0;
2581 block->layout.stream = state->out_qualifier->stream;
2584 foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
2585 ast_type_qualifier& qualifier = member->type->qualifier;
2586 if ((qualifier.flags.i & interface_type_mask) == 0) {
2587 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
2588 * "If no optional qualifier is used in a member declaration, the
2589 * qualifier of the variable is just in, out, or uniform as declared
2590 * by interface-qualifier."
2592 qualifier.flags.i |= block_interface_qualifier;
2593 } else if ((qualifier.flags.i & interface_type_mask) !=
2594 block_interface_qualifier) {
2595 /* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
2596 * "If optional qualifiers are used, they can include interpolation
2597 * and storage qualifiers and they must declare an input, output,
2598 * or uniform variable consistent with the interface qualifier of
2601 _mesa_glsl_error(& @1, state,
2602 "uniform/in/out qualifier on "
2603 "interface block member does not match "
2604 "the interface block");
2607 /* From GLSL ES 3.0, chapter 4.3.7 "Interface Blocks":
2609 * "GLSL ES 3.0 does not support interface blocks for shader inputs or
2612 * And from GLSL ES 3.0, chapter 4.6.1 "The invariant qualifier":.
2614 * "Only variables output from a shader can be candidates for
2617 * From GLSL 4.40 and GLSL 1.50, section "Interface Blocks":
2619 * "If optional qualifiers are used, they can include interpolation
2620 * qualifiers, auxiliary storage qualifiers, and storage qualifiers
2621 * and they must declare an input, output, or uniform member
2622 * consistent with the interface qualifier of the block"
2624 if (qualifier.flags.q.invariant)
2625 _mesa_glsl_error(&@1, state,
2626 "invariant qualifiers cannot be used "
2627 "with interface blocks members");
2634 interface_qualifier:
2637 memset(& $$, 0, sizeof($$));
2642 memset(& $$, 0, sizeof($$));
2647 memset(& $$, 0, sizeof($$));
2648 $$.flags.q.uniform = 1;
2655 $$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
2660 $$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
2662 $$->set_location(@1);
2664 | NEW_IDENTIFIER array_specifier
2666 $$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
2668 $$->set_location_range(@1, @2);
2676 $1->link.self_link();
2678 | member_declaration member_list
2681 $2->link.insert_before(& $$->link);
2686 fully_specified_type struct_declarator_list ';'
2689 ast_fully_specified_type *type = $1;
2690 type->set_location(@1);
2692 if (type->qualifier.flags.q.attribute) {
2693 _mesa_glsl_error(& @1, state,
2694 "keyword 'attribute' cannot be used with "
2695 "interface block member");
2696 } else if (type->qualifier.flags.q.varying) {
2697 _mesa_glsl_error(& @1, state,
2698 "keyword 'varying' cannot be used with "
2699 "interface block member");
2702 $$ = new(ctx) ast_declarator_list(type);
2703 $$->set_location(@2);
2705 $$->declarations.push_degenerate_list_at_head(& $2->link);
2710 layout_qualifier UNIFORM ';'
2712 if (!state->default_uniform_qualifier->merge_qualifier(& @1, state, $1)) {
2718 | layout_qualifier IN_TOK ';'
2721 if (!state->in_qualifier->merge_in_qualifier(& @1, state, $1, $$)) {
2726 | layout_qualifier OUT_TOK ';'
2728 if (state->stage != MESA_SHADER_GEOMETRY) {
2729 _mesa_glsl_error(& @1, state,
2730 "out layout qualifiers only valid in "
2731 "geometry shaders");
2733 if ($1.flags.q.prim_type) {
2734 /* Make sure this is a valid output primitive type. */
2735 switch ($1.prim_type) {
2738 case GL_TRIANGLE_STRIP:
2741 _mesa_glsl_error(&@1, state, "invalid geometry shader output "
2746 if (!state->out_qualifier->merge_qualifier(& @1, state, $1))
2749 /* Allow future assigments of global out's stream id value */
2750 state->out_qualifier->flags.q.explicit_stream = 0;