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 ir_constant
*const constant
=
53 result
->constant_expression_value(mem_ctx
);
58 actual_parameters
->push_tail(result
);
67 * Generate a source prototype for a function signature
69 * \param return_type Return type of the function. May be \c NULL.
70 * \param name Name of the function.
71 * \param parameters List of \c ir_instruction nodes representing the
72 * parameter list for the function. This may be either a
73 * formal (\c ir_variable) or actual (\c ir_rvalue)
74 * parameter list. Only the type is used.
77 * A ralloced string representing the prototype of the function.
80 prototype_string(const glsl_type
*return_type
, const char *name
,
81 exec_list
*parameters
)
85 if (return_type
!= NULL
)
86 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
88 ralloc_asprintf_append(&str
, "%s(", name
);
90 const char *comma
= "";
91 foreach_in_list(const ir_variable
, param
, parameters
) {
92 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
96 ralloc_strcat(&str
, ")");
101 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
102 const ir_variable
*formal
, const ir_variable
*actual
)
105 * From the ARB_shader_image_load_store specification:
107 * "The values of image variables qualified with coherent,
108 * volatile, restrict, readonly, or writeonly may not be passed
109 * to functions whose formal parameters lack such
110 * qualifiers. [...] It is legal to have additional qualifiers
111 * on a formal parameter, but not to have fewer."
113 if (actual
->data
.memory_coherent
&& !formal
->data
.memory_coherent
) {
114 _mesa_glsl_error(loc
, state
,
115 "function call parameter `%s' drops "
116 "`coherent' qualifier", formal
->name
);
120 if (actual
->data
.memory_volatile
&& !formal
->data
.memory_volatile
) {
121 _mesa_glsl_error(loc
, state
,
122 "function call parameter `%s' drops "
123 "`volatile' qualifier", formal
->name
);
127 if (actual
->data
.memory_restrict
&& !formal
->data
.memory_restrict
) {
128 _mesa_glsl_error(loc
, state
,
129 "function call parameter `%s' drops "
130 "`restrict' qualifier", formal
->name
);
134 if (actual
->data
.memory_read_only
&& !formal
->data
.memory_read_only
) {
135 _mesa_glsl_error(loc
, state
,
136 "function call parameter `%s' drops "
137 "`readonly' qualifier", formal
->name
);
141 if (actual
->data
.memory_write_only
&& !formal
->data
.memory_write_only
) {
142 _mesa_glsl_error(loc
, state
,
143 "function call parameter `%s' drops "
144 "`writeonly' qualifier", formal
->name
);
152 verify_first_atomic_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
156 (!var
->is_in_shader_storage_block() &&
157 var
->data
.mode
!= ir_var_shader_shared
)) {
158 _mesa_glsl_error(loc
, state
, "First argument to atomic function "
159 "must be a buffer or shared variable");
166 is_atomic_function(const char *func_name
)
168 return !strcmp(func_name
, "atomicAdd") ||
169 !strcmp(func_name
, "atomicMin") ||
170 !strcmp(func_name
, "atomicMax") ||
171 !strcmp(func_name
, "atomicAnd") ||
172 !strcmp(func_name
, "atomicOr") ||
173 !strcmp(func_name
, "atomicXor") ||
174 !strcmp(func_name
, "atomicExchange") ||
175 !strcmp(func_name
, "atomicCompSwap");
179 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
180 * that 'const_in' formal parameters (an extension in our IR) correspond to
181 * ir_constant actual parameters.
184 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
185 ir_function_signature
*sig
,
186 exec_list
&actual_ir_parameters
,
187 exec_list
&actual_ast_parameters
)
189 exec_node
*actual_ir_node
= actual_ir_parameters
.get_head_raw();
190 exec_node
*actual_ast_node
= actual_ast_parameters
.get_head_raw();
192 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
193 /* The lists must be the same length. */
194 assert(!actual_ir_node
->is_tail_sentinel());
195 assert(!actual_ast_node
->is_tail_sentinel());
197 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
198 const ast_expression
*const actual_ast
=
199 exec_node_data(ast_expression
, actual_ast_node
, link
);
201 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
204 YYLTYPE loc
= actual_ast
->get_location();
206 /* Verify that 'const_in' parameters are ir_constants. */
207 if (formal
->data
.mode
== ir_var_const_in
&&
208 actual
->ir_type
!= ir_type_constant
) {
209 _mesa_glsl_error(&loc
, state
,
210 "parameter `in %s' must be a constant expression",
215 /* Verify that shader_in parameters are shader inputs */
216 if (formal
->data
.must_be_shader_input
) {
217 const ir_rvalue
*val
= actual
;
219 /* GLSL 4.40 allows swizzles, while earlier GLSL versions do not. */
220 if (val
->ir_type
== ir_type_swizzle
) {
221 if (!state
->is_version(440, 0)) {
222 _mesa_glsl_error(&loc
, state
,
223 "parameter `%s` must not be swizzled",
227 val
= ((ir_swizzle
*)val
)->val
;
231 if (val
->ir_type
== ir_type_dereference_array
) {
232 val
= ((ir_dereference_array
*)val
)->array
;
233 } else if (val
->ir_type
== ir_type_dereference_record
&&
235 val
= ((ir_dereference_record
*)val
)->record
;
240 ir_variable
*var
= NULL
;
241 if (const ir_dereference_variable
*deref_var
= val
->as_dereference_variable())
242 var
= deref_var
->variable_referenced();
244 if (!var
|| var
->data
.mode
!= ir_var_shader_in
) {
245 _mesa_glsl_error(&loc
, state
,
246 "parameter `%s` must be a shader input",
251 var
->data
.must_be_shader_input
= 1;
254 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
255 if (formal
->data
.mode
== ir_var_function_out
256 || formal
->data
.mode
== ir_var_function_inout
) {
257 const char *mode
= NULL
;
258 switch (formal
->data
.mode
) {
259 case ir_var_function_out
: mode
= "out"; break;
260 case ir_var_function_inout
: mode
= "inout"; break;
261 default: assert(false); break;
264 /* This AST-based check catches errors like f(i++). The IR-based
265 * is_lvalue() is insufficient because the actual parameter at the
266 * IR-level is just a temporary value, which is an l-value.
268 if (actual_ast
->non_lvalue_description
!= NULL
) {
269 _mesa_glsl_error(&loc
, state
,
270 "function parameter '%s %s' references a %s",
272 actual_ast
->non_lvalue_description
);
276 ir_variable
*var
= actual
->variable_referenced();
278 if (var
&& formal
->data
.mode
== ir_var_function_inout
) {
279 if ((var
->data
.mode
== ir_var_auto
||
280 var
->data
.mode
== ir_var_shader_out
) &&
281 !var
->data
.assigned
&&
282 !is_gl_identifier(var
->name
)) {
283 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
289 var
->data
.assigned
= true;
291 if (var
&& var
->data
.read_only
) {
292 _mesa_glsl_error(&loc
, state
,
293 "function parameter '%s %s' references the "
294 "read-only variable '%s'",
296 actual
->variable_referenced()->name
);
298 } else if (!actual
->is_lvalue(state
)) {
299 _mesa_glsl_error(&loc
, state
,
300 "function parameter '%s %s' is not an lvalue",
305 assert(formal
->data
.mode
== ir_var_function_in
||
306 formal
->data
.mode
== ir_var_const_in
);
307 ir_variable
*var
= actual
->variable_referenced();
309 if ((var
->data
.mode
== ir_var_auto
||
310 var
->data
.mode
== ir_var_shader_out
) &&
311 !var
->data
.assigned
&&
312 !is_gl_identifier(var
->name
)) {
313 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
319 if (formal
->type
->is_image() &&
320 actual
->variable_referenced()) {
321 if (!verify_image_parameter(&loc
, state
, formal
,
322 actual
->variable_referenced()))
326 actual_ir_node
= actual_ir_node
->next
;
327 actual_ast_node
= actual_ast_node
->next
;
330 /* The first parameter of atomic functions must be a buffer variable */
331 const char *func_name
= sig
->function_name();
332 bool is_atomic
= is_atomic_function(func_name
);
334 const ir_rvalue
*const actual
=
335 (ir_rvalue
*) actual_ir_parameters
.get_head_raw();
337 const ast_expression
*const actual_ast
=
338 exec_node_data(ast_expression
,
339 actual_ast_parameters
.get_head_raw(), link
);
340 YYLTYPE loc
= actual_ast
->get_location();
342 if (!verify_first_atomic_parameter(&loc
, state
,
343 actual
->variable_referenced())) {
351 struct copy_index_deref_data
{
353 exec_list
*before_instructions
;
357 copy_index_derefs_to_temps(ir_instruction
*ir
, void *data
)
359 struct copy_index_deref_data
*d
= (struct copy_index_deref_data
*)data
;
361 if (ir
->ir_type
== ir_type_dereference_array
) {
362 ir_dereference_array
*a
= (ir_dereference_array
*) ir
;
363 ir
= a
->array
->as_dereference();
365 ir_rvalue
*idx
= a
->array_index
;
366 if (idx
->as_dereference_variable()) {
367 ir_variable
*var
= idx
->variable_referenced();
369 /* If the index is read only it cannot change so there is no need
372 if (var
->data
.read_only
|| var
->data
.memory_read_only
)
375 ir_variable
*tmp
= new(d
->mem_ctx
) ir_variable(idx
->type
, "idx_tmp",
377 d
->before_instructions
->push_tail(tmp
);
379 ir_dereference_variable
*const deref_tmp_1
=
380 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
381 ir_assignment
*const assignment
=
382 new(d
->mem_ctx
) ir_assignment(deref_tmp_1
,
383 idx
->clone(d
->mem_ctx
, NULL
));
384 d
->before_instructions
->push_tail(assignment
);
386 /* Replace the array index with a dereference of the new temporary */
387 ir_dereference_variable
*const deref_tmp_2
=
388 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
389 a
->array_index
= deref_tmp_2
;
395 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
396 exec_list
*before_instructions
, exec_list
*after_instructions
,
397 bool parameter_is_inout
)
399 ir_expression
*const expr
= actual
->as_expression();
401 /* If the types match exactly and the parameter is not a vector-extract,
402 * nothing needs to be done to fix the parameter.
404 if (formal_type
== actual
->type
405 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
408 /* An array index could also be an out variable so we need to make a copy
409 * of them before the function is called.
411 if (!actual
->as_dereference_variable()) {
412 struct copy_index_deref_data data
;
413 data
.mem_ctx
= mem_ctx
;
414 data
.before_instructions
= before_instructions
;
416 visit_tree(actual
, copy_index_derefs_to_temps
, &data
);
419 /* To convert an out parameter, we need to create a temporary variable to
420 * hold the value before conversion, and then perform the conversion after
421 * the function call returns.
423 * This has the effect of transforming code like this:
429 * Into IR that's equivalent to this:
433 * int out_parameter_conversion;
434 * f(out_parameter_conversion);
435 * value = float(out_parameter_conversion);
437 * If the parameter is an ir_expression of ir_binop_vector_extract,
438 * additional conversion is needed in the post-call re-write.
441 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
443 before_instructions
->push_tail(tmp
);
445 /* If the parameter is an inout parameter, copy the value of the actual
446 * parameter to the new temporary. Note that no type conversion is allowed
447 * here because inout parameters must match types exactly.
449 if (parameter_is_inout
) {
450 /* Inout parameters should never require conversion, since that would
451 * require an implicit conversion to exist both to and from the formal
452 * parameter type, and there are no bidirectional implicit conversions.
454 assert (actual
->type
== formal_type
);
456 ir_dereference_variable
*const deref_tmp_1
=
457 new(mem_ctx
) ir_dereference_variable(tmp
);
458 ir_assignment
*const assignment
=
459 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
460 before_instructions
->push_tail(assignment
);
463 /* Replace the parameter in the call with a dereference of the new
466 ir_dereference_variable
*const deref_tmp_2
=
467 new(mem_ctx
) ir_dereference_variable(tmp
);
468 actual
->replace_with(deref_tmp_2
);
471 /* Copy the temporary variable to the actual parameter with optional
472 * type conversion applied.
474 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
475 if (actual
->type
!= formal_type
)
476 rhs
= convert_component(rhs
, actual
->type
);
478 ir_rvalue
*lhs
= actual
;
479 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
480 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
482 expr
->operands
[1]->clone(mem_ctx
,
486 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
487 after_instructions
->push_tail(assignment_2
);
491 * Generate a function call.
493 * For non-void functions, this returns a dereference of the temporary
494 * variable which stores the return value for the call. For void functions,
498 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
499 exec_list
*actual_parameters
,
500 ir_variable
*sub_var
,
501 ir_rvalue
*array_idx
,
502 struct _mesa_glsl_parse_state
*state
)
505 exec_list post_call_conversions
;
507 /* Perform implicit conversion of arguments. For out parameters, we need
508 * to place them in a temporary variable and do the conversion after the
509 * call takes place. Since we haven't emitted the call yet, we'll place
510 * the post-call conversions in a temporary exec_list, and emit them later.
512 foreach_two_lists(formal_node
, &sig
->parameters
,
513 actual_node
, actual_parameters
) {
514 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
515 ir_variable
*formal
= (ir_variable
*) formal_node
;
517 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
518 switch (formal
->data
.mode
) {
519 case ir_var_const_in
:
520 case ir_var_function_in
: {
522 = convert_component(actual
, formal
->type
);
523 actual
->replace_with(converted
);
526 case ir_var_function_out
:
527 case ir_var_function_inout
:
528 fix_parameter(ctx
, actual
, formal
->type
,
529 instructions
, &post_call_conversions
,
530 formal
->data
.mode
== ir_var_function_inout
);
533 assert (!"Illegal formal parameter mode");
539 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
541 * "Initializers for const declarations must be formed from literal
542 * values, other const variables (not including function call
543 * paramaters), or expressions of these.
545 * Constructors may be used in such expressions, but function calls may
548 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
550 * "A constant expression is one of
554 * - a built-in function call whose arguments are all constant
555 * expressions, with the exception of the texture lookup
556 * functions, the noise functions, and ftransform. The built-in
557 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
558 * inside an initializer with an argument that is a constant
561 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
563 * "A constant expression is one of
567 * - a built-in function call whose arguments are all constant
568 * expressions, with the exception of the texture lookup
571 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
573 * "A constant expression is one of
577 * - a built-in function call whose arguments are all constant
578 * expressions, with the exception of the texture lookup
579 * functions. The built-in functions dFdx, dFdy, and fwidth must
580 * return 0 when evaluated inside an initializer with an argument
581 * that is a constant expression."
583 * If the function call is a constant expression, don't generate any
584 * instructions; just generate an ir_constant.
586 if (state
->is_version(120, 100) ||
587 state
->ctx
->Const
.AllowGLSLBuiltinConstantExpression
) {
588 ir_constant
*value
= sig
->constant_expression_value(ctx
,
596 ir_dereference_variable
*deref
= NULL
;
597 if (!sig
->return_type
->is_void()) {
598 /* Create a new temporary to hold the return value. */
599 char *const name
= ir_variable::temporaries_allocate_names
600 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
605 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
606 instructions
->push_tail(var
);
610 deref
= new(ctx
) ir_dereference_variable(var
);
613 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
614 actual_parameters
, sub_var
, array_idx
);
615 instructions
->push_tail(call
);
616 if (sig
->is_builtin()) {
617 /* inline immediately */
618 call
->generate_inline(call
);
622 /* Also emit any necessary out-parameter conversions. */
623 instructions
->append_list(&post_call_conversions
);
625 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
629 * Given a function name and parameter list, find the matching signature.
631 static ir_function_signature
*
632 match_function_by_name(const char *name
,
633 exec_list
*actual_parameters
,
634 struct _mesa_glsl_parse_state
*state
)
636 ir_function
*f
= state
->symbols
->get_function(name
);
637 ir_function_signature
*local_sig
= NULL
;
638 ir_function_signature
*sig
= NULL
;
640 /* Is the function hidden by a record type constructor? */
641 if (state
->symbols
->get_type(name
))
642 return sig
; /* no match */
644 /* Is the function hidden by a variable (impossible in 1.10)? */
645 if (!state
->symbols
->separate_function_namespace
646 && state
->symbols
->get_variable(name
))
647 return sig
; /* no match */
650 /* In desktop GL, the presence of a user-defined signature hides any
651 * built-in signatures, so we must ignore them. In contrast, in ES2
652 * user-defined signatures add new overloads, so we must consider them.
654 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
656 /* Look for a match in the local shader. If exact, we're done. */
657 bool is_exact
= false;
658 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
659 allow_builtins
, &is_exact
);
667 /* Local shader has no exact candidates; check the built-ins. */
668 _mesa_glsl_initialize_builtin_functions();
669 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
673 static ir_function_signature
*
674 match_subroutine_by_name(const char *name
,
675 exec_list
*actual_parameters
,
676 struct _mesa_glsl_parse_state
*state
,
680 ir_function_signature
*sig
= NULL
;
681 ir_function
*f
, *found
= NULL
;
682 const char *new_name
;
684 bool is_exact
= false;
687 ralloc_asprintf(ctx
, "%s_%s",
688 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
690 var
= state
->symbols
->get_variable(new_name
);
694 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
695 f
= state
->subroutine_types
[i
];
696 if (strcmp(f
->name
, var
->type
->without_array()->name
))
705 sig
= found
->matching_signature(state
, actual_parameters
,
711 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
712 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
713 const ast_expression
*array
, ast_expression
*idx
,
714 const char **function_name
, exec_list
*actual_parameters
)
716 if (array
->oper
== ast_array_index
) {
717 /* This handles arrays of arrays */
718 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
720 array
->subexpressions
[0],
721 array
->subexpressions
[1],
724 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
726 YYLTYPE index_loc
= idx
->get_location();
727 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
728 outer_array_idx
, loc
,
731 ir_variable
*sub_var
= NULL
;
732 *function_name
= array
->primary_expression
.identifier
;
734 if (!match_subroutine_by_name(*function_name
, actual_parameters
,
736 _mesa_glsl_error(&loc
, state
, "Unknown subroutine `%s'",
738 *function_name
= NULL
; /* indicate error condition to caller */
742 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
743 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
748 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
754 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
755 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
758 char *str
= prototype_string(sig
->return_type
, f
->name
,
760 _mesa_glsl_error(loc
, state
, " %s", str
);
766 * Raise a "no matching function" error, listing all possible overloads the
767 * compiler considered so developers can figure out what went wrong.
770 no_matching_function_error(const char *name
,
772 exec_list
*actual_parameters
,
773 _mesa_glsl_parse_state
*state
)
775 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
777 if (state
->symbols
->get_function(name
) == NULL
778 && (!state
->uses_builtin_functions
779 || sh
->symbols
->get_function(name
) == NULL
)) {
780 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
782 char *str
= prototype_string(NULL
, name
, actual_parameters
);
783 _mesa_glsl_error(loc
, state
,
784 "no matching function for call to `%s';"
789 print_function_prototypes(state
, loc
,
790 state
->symbols
->get_function(name
));
792 if (state
->uses_builtin_functions
) {
793 print_function_prototypes(state
, loc
,
794 sh
->symbols
->get_function(name
));
800 * Perform automatic type conversion of constructor parameters
802 * This implements the rules in the "Conversion and Scalar Constructors"
803 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
806 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
808 void *ctx
= ralloc_parent(src
);
809 const unsigned a
= desired_type
->base_type
;
810 const unsigned b
= src
->type
->base_type
;
811 ir_expression
*result
= NULL
;
813 if (src
->type
->is_error())
816 assert(a
<= GLSL_TYPE_IMAGE
);
817 assert(b
<= GLSL_TYPE_IMAGE
);
826 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
828 case GLSL_TYPE_FLOAT
:
829 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
832 result
= new(ctx
) ir_expression(ir_unop_i2u
,
833 new(ctx
) ir_expression(ir_unop_b2i
,
836 case GLSL_TYPE_DOUBLE
:
837 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
839 case GLSL_TYPE_UINT64
:
840 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
842 case GLSL_TYPE_INT64
:
843 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
845 case GLSL_TYPE_SAMPLER
:
846 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
848 case GLSL_TYPE_IMAGE
:
849 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
856 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
858 case GLSL_TYPE_FLOAT
:
859 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
862 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
864 case GLSL_TYPE_DOUBLE
:
865 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
867 case GLSL_TYPE_UINT64
:
868 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
870 case GLSL_TYPE_INT64
:
871 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
875 case GLSL_TYPE_FLOAT
:
878 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
881 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
884 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
886 case GLSL_TYPE_DOUBLE
:
887 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
889 case GLSL_TYPE_UINT64
:
890 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
892 case GLSL_TYPE_INT64
:
893 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
900 result
= new(ctx
) ir_expression(ir_unop_i2b
,
901 new(ctx
) ir_expression(ir_unop_u2i
,
905 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
907 case GLSL_TYPE_FLOAT
:
908 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
910 case GLSL_TYPE_DOUBLE
:
911 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
913 case GLSL_TYPE_UINT64
:
914 result
= new(ctx
) ir_expression(ir_unop_i642b
,
915 new(ctx
) ir_expression(ir_unop_u642i64
,
918 case GLSL_TYPE_INT64
:
919 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
923 case GLSL_TYPE_DOUBLE
:
926 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
929 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
932 result
= new(ctx
) ir_expression(ir_unop_f2d
,
933 new(ctx
) ir_expression(ir_unop_b2f
,
936 case GLSL_TYPE_FLOAT
:
937 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
939 case GLSL_TYPE_UINT64
:
940 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
942 case GLSL_TYPE_INT64
:
943 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
947 case GLSL_TYPE_UINT64
:
950 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
953 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
956 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
957 new(ctx
) ir_expression(ir_unop_b2i64
,
960 case GLSL_TYPE_FLOAT
:
961 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
963 case GLSL_TYPE_DOUBLE
:
964 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
966 case GLSL_TYPE_INT64
:
967 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
971 case GLSL_TYPE_INT64
:
974 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
977 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
980 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
982 case GLSL_TYPE_FLOAT
:
983 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
985 case GLSL_TYPE_DOUBLE
:
986 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
988 case GLSL_TYPE_UINT64
:
989 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
993 case GLSL_TYPE_SAMPLER
:
997 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
1001 case GLSL_TYPE_IMAGE
:
1003 case GLSL_TYPE_UINT
:
1005 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
1011 assert(result
!= NULL
);
1012 assert(result
->type
== desired_type
);
1014 /* Try constant folding; it may fold in the conversion we just added. */
1015 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
1016 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
1021 * Perform automatic type and constant conversion of constructor parameters
1023 * This implements the rules in the "Implicit Conversions" rules, not the
1024 * "Conversion and Scalar Constructors".
1026 * After attempting the implicit conversion, an attempt to convert into a
1027 * constant valued expression is also done.
1029 * The \c from \c ir_rvalue is converted "in place".
1031 * \param from Operand that is being converted
1032 * \param to Base type the operand will be converted to
1033 * \param state GLSL compiler state
1036 * If the attempt to convert into a constant expression succeeds, \c true is
1037 * returned. Otherwise \c false is returned.
1040 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
1041 struct _mesa_glsl_parse_state
*state
)
1043 void *mem_ctx
= state
;
1044 ir_rvalue
*result
= from
;
1046 if (to
!= from
->type
->base_type
) {
1047 const glsl_type
*desired_type
=
1048 glsl_type::get_instance(to
,
1049 from
->type
->vector_elements
,
1050 from
->type
->matrix_columns
);
1052 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1053 /* Even though convert_component() implements the constructor
1054 * conversion rules (not the implicit conversion rules), its safe
1055 * to use it here because we already checked that the implicit
1056 * conversion is legal.
1058 result
= convert_component(from
, desired_type
);
1062 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
1064 if (constant
!= NULL
)
1067 if (from
!= result
) {
1068 from
->replace_with(result
);
1072 return constant
!= NULL
;
1077 * Dereference a specific component from a scalar, vector, or matrix
1080 dereference_component(ir_rvalue
*src
, unsigned component
)
1082 void *ctx
= ralloc_parent(src
);
1083 assert(component
< src
->type
->components());
1085 /* If the source is a constant, just create a new constant instead of a
1086 * dereference of the existing constant.
1088 ir_constant
*constant
= src
->as_constant();
1090 return new(ctx
) ir_constant(constant
, component
);
1092 if (src
->type
->is_scalar()) {
1094 } else if (src
->type
->is_vector()) {
1095 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1097 assert(src
->type
->is_matrix());
1099 /* Dereference a row of the matrix, then call this function again to get
1100 * a specific element from that row.
1102 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1103 const int r
= component
% src
->type
->column_type()->vector_elements
;
1104 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1105 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1108 col
->type
= src
->type
->column_type();
1110 return dereference_component(col
, r
);
1113 assert(!"Should not get here.");
1119 process_vec_mat_constructor(exec_list
*instructions
,
1120 const glsl_type
*constructor_type
,
1121 YYLTYPE
*loc
, exec_list
*parameters
,
1122 struct _mesa_glsl_parse_state
*state
)
1126 /* The ARB_shading_language_420pack spec says:
1128 * "If an initializer is a list of initializers enclosed in curly braces,
1129 * the variable being declared must be a vector, a matrix, an array, or a
1132 * int i = { 1 }; // illegal, i is not an aggregate"
1134 if (constructor_type
->vector_elements
<= 1) {
1135 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1136 "matrices, arrays, and structs");
1137 return ir_rvalue::error_value(ctx
);
1140 exec_list actual_parameters
;
1141 const unsigned parameter_count
=
1142 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1144 if (parameter_count
== 0
1145 || (constructor_type
->is_vector() &&
1146 constructor_type
->vector_elements
!= parameter_count
)
1147 || (constructor_type
->is_matrix() &&
1148 constructor_type
->matrix_columns
!= parameter_count
)) {
1149 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1150 constructor_type
->is_vector() ? "vector" : "matrix",
1151 constructor_type
->vector_elements
);
1152 return ir_rvalue::error_value(ctx
);
1155 bool all_parameters_are_constant
= true;
1157 /* Type cast each parameter and, if possible, fold constants. */
1158 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1159 /* Apply implicit conversions (not the scalar constructor rules, see the
1160 * spec quote above!) and attempt to convert the parameter to a constant
1161 * valued expression. After doing so, track whether or not all the
1162 * parameters to the constructor are trivially constant valued
1165 all_parameters_are_constant
&=
1166 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1168 if (constructor_type
->is_matrix()) {
1169 if (ir
->type
!= constructor_type
->column_type()) {
1170 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1171 "expected: %s, found %s",
1172 constructor_type
->column_type()->name
,
1174 return ir_rvalue::error_value(ctx
);
1176 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1177 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1178 "expected: %s, found %s",
1179 constructor_type
->get_scalar_type()->name
,
1181 return ir_rvalue::error_value(ctx
);
1185 if (all_parameters_are_constant
)
1186 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1188 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1190 instructions
->push_tail(var
);
1194 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1195 ir_instruction
*assignment
= NULL
;
1197 if (var
->type
->is_matrix()) {
1199 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1200 assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1202 /* use writemask rather than index for vector */
1203 assert(var
->type
->is_vector());
1205 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1206 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1207 (unsigned)(1 << i
));
1210 instructions
->push_tail(assignment
);
1215 return new(ctx
) ir_dereference_variable(var
);
1220 process_array_constructor(exec_list
*instructions
,
1221 const glsl_type
*constructor_type
,
1222 YYLTYPE
*loc
, exec_list
*parameters
,
1223 struct _mesa_glsl_parse_state
*state
)
1226 /* Array constructors come in two forms: sized and unsized. Sized array
1227 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1228 * variables. In this case the number of parameters must exactly match the
1229 * specified size of the array.
1231 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1232 * are vec4 variables. In this case the size of the array being constructed
1233 * is determined by the number of parameters.
1235 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1237 * "There must be exactly the same number of arguments as the size of
1238 * the array being constructed. If no size is present in the
1239 * constructor, then the array is explicitly sized to the number of
1240 * arguments provided. The arguments are assigned in order, starting at
1241 * element 0, to the elements of the constructed array. Each argument
1242 * must be the same type as the element type of the array, or be a type
1243 * that can be converted to the element type of the array according to
1244 * Section 4.1.10 "Implicit Conversions.""
1246 exec_list actual_parameters
;
1247 const unsigned parameter_count
=
1248 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1249 bool is_unsized_array
= constructor_type
->is_unsized_array();
1251 if ((parameter_count
== 0) ||
1252 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1253 const unsigned min_param
= is_unsized_array
1254 ? 1 : constructor_type
->length
;
1256 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1258 is_unsized_array
? "at least" : "exactly",
1259 min_param
, (min_param
<= 1) ? "" : "s");
1260 return ir_rvalue::error_value(ctx
);
1263 if (is_unsized_array
) {
1265 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1267 assert(constructor_type
!= NULL
);
1268 assert(constructor_type
->length
== parameter_count
);
1271 bool all_parameters_are_constant
= true;
1272 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1274 /* Type cast each parameter and, if possible, fold constants. */
1275 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1276 /* Apply implicit conversions (not the scalar constructor rules, see the
1277 * spec quote above!) and attempt to convert the parameter to a constant
1278 * valued expression. After doing so, track whether or not all the
1279 * parameters to the constructor are trivially constant valued
1282 all_parameters_are_constant
&=
1283 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1285 if (constructor_type
->fields
.array
->is_unsized_array()) {
1286 /* As the inner parameters of the constructor are created without
1287 * knowledge of each other we need to check to make sure unsized
1288 * parameters of unsized constructors all end up with the same size.
1290 * e.g we make sure to fail for a constructor like this:
1291 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1292 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1293 * vec4[](vec4(0.0), vec4(1.0)));
1295 if (element_type
->is_unsized_array()) {
1296 /* This is the first parameter so just get the type */
1297 element_type
= ir
->type
;
1298 } else if (element_type
!= ir
->type
) {
1299 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1300 "expected: %s, found %s",
1303 return ir_rvalue::error_value(ctx
);
1305 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1306 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1307 "expected: %s, found %s",
1308 constructor_type
->fields
.array
->name
,
1310 return ir_rvalue::error_value(ctx
);
1312 element_type
= ir
->type
;
1316 if (constructor_type
->fields
.array
->is_unsized_array()) {
1318 glsl_type::get_array_instance(element_type
,
1320 assert(constructor_type
!= NULL
);
1321 assert(constructor_type
->length
== parameter_count
);
1324 if (all_parameters_are_constant
)
1325 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1327 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1329 instructions
->push_tail(var
);
1332 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1333 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1334 new(ctx
) ir_constant(i
));
1336 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1337 instructions
->push_tail(assignment
);
1342 return new(ctx
) ir_dereference_variable(var
);
1347 * Determine if a list consists of a single scalar r-value
1350 single_scalar_parameter(exec_list
*parameters
)
1352 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1353 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1355 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1360 * Generate inline code for a vector constructor
1362 * The generated constructor code will consist of a temporary variable
1363 * declaration of the same type as the constructor. A sequence of assignments
1364 * from constructor parameters to the temporary will follow.
1367 * An \c ir_dereference_variable of the temprorary generated in the constructor
1371 emit_inline_vector_constructor(const glsl_type
*type
,
1372 exec_list
*instructions
,
1373 exec_list
*parameters
,
1376 assert(!parameters
->is_empty());
1378 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1379 instructions
->push_tail(var
);
1381 /* There are three kinds of vector constructors.
1383 * - Construct a vector from a single scalar by replicating that scalar to
1384 * all components of the vector.
1386 * - Construct a vector from at least a matrix. This case should already
1387 * have been taken care of in ast_function_expression::hir by breaking
1388 * down the matrix into a series of column vectors.
1390 * - Construct a vector from an arbirary combination of vectors and
1391 * scalars. The components of the constructor parameters are assigned
1392 * to the vector in order until the vector is full.
1394 const unsigned lhs_components
= type
->components();
1395 if (single_scalar_parameter(parameters
)) {
1396 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1397 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1399 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1400 const unsigned mask
= (1U << lhs_components
) - 1;
1402 assert(rhs
->type
== lhs
->type
);
1404 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1405 instructions
->push_tail(inst
);
1407 unsigned base_component
= 0;
1408 unsigned base_lhs_component
= 0;
1409 ir_constant_data data
;
1410 unsigned constant_mask
= 0, constant_components
= 0;
1412 memset(&data
, 0, sizeof(data
));
1414 foreach_in_list(ir_rvalue
, param
, parameters
) {
1415 unsigned rhs_components
= param
->type
->components();
1417 /* Do not try to assign more components to the vector than it has! */
1418 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1419 rhs_components
= lhs_components
- base_lhs_component
;
1422 const ir_constant
*const c
= param
->as_constant();
1424 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1425 switch (c
->type
->base_type
) {
1426 case GLSL_TYPE_UINT
:
1427 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1430 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1432 case GLSL_TYPE_FLOAT
:
1433 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1435 case GLSL_TYPE_DOUBLE
:
1436 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1438 case GLSL_TYPE_BOOL
:
1439 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1441 case GLSL_TYPE_UINT64
:
1442 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1444 case GLSL_TYPE_INT64
:
1445 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1448 assert(!"Should not get here.");
1453 /* Mask of fields to be written in the assignment. */
1454 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1455 constant_components
+= rhs_components
;
1457 base_component
+= rhs_components
;
1459 /* Advance the component index by the number of components
1460 * that were just assigned.
1462 base_lhs_component
+= rhs_components
;
1465 if (constant_mask
!= 0) {
1466 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1467 const glsl_type
*rhs_type
=
1468 glsl_type::get_instance(var
->type
->base_type
,
1469 constant_components
,
1471 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1473 ir_instruction
*inst
=
1474 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1475 instructions
->push_tail(inst
);
1479 foreach_in_list(ir_rvalue
, param
, parameters
) {
1480 unsigned rhs_components
= param
->type
->components();
1482 /* Do not try to assign more components to the vector than it has! */
1483 if ((rhs_components
+ base_component
) > lhs_components
) {
1484 rhs_components
= lhs_components
- base_component
;
1487 /* If we do not have any components left to copy, break out of the
1488 * loop. This can happen when initializing a vec4 with a mat3 as the
1489 * mat3 would have been broken into a series of column vectors.
1491 if (rhs_components
== 0) {
1495 const ir_constant
*const c
= param
->as_constant();
1497 /* Mask of fields to be written in the assignment. */
1498 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1501 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1503 /* Generate a swizzle so that LHS and RHS sizes match. */
1505 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1507 ir_instruction
*inst
=
1508 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1509 instructions
->push_tail(inst
);
1512 /* Advance the component index by the number of components that were
1515 base_component
+= rhs_components
;
1518 return new(ctx
) ir_dereference_variable(var
);
1523 * Generate assignment of a portion of a vector to a portion of a matrix column
1525 * \param src_base First component of the source to be used in assignment
1526 * \param column Column of destination to be assiged
1527 * \param row_base First component of the destination column to be assigned
1528 * \param count Number of components to be assigned
1531 * \c src_base + \c count must be less than or equal to the number of
1532 * components in the source vector.
1534 static ir_instruction
*
1535 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1536 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1539 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1540 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1543 assert(column_ref
->type
->components() >= (row_base
+ count
));
1544 assert(src
->type
->components() >= (src_base
+ count
));
1546 /* Generate a swizzle that extracts the number of components from the source
1547 * that are to be assigned to the column of the matrix.
1549 if (count
< src
->type
->vector_elements
) {
1550 src
= new(mem_ctx
) ir_swizzle(src
,
1551 src_base
+ 0, src_base
+ 1,
1552 src_base
+ 2, src_base
+ 3,
1556 /* Mask of fields to be written in the assignment. */
1557 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1559 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1564 * Generate inline code for a matrix constructor
1566 * The generated constructor code will consist of a temporary variable
1567 * declaration of the same type as the constructor. A sequence of assignments
1568 * from constructor parameters to the temporary will follow.
1571 * An \c ir_dereference_variable of the temprorary generated in the constructor
1575 emit_inline_matrix_constructor(const glsl_type
*type
,
1576 exec_list
*instructions
,
1577 exec_list
*parameters
,
1580 assert(!parameters
->is_empty());
1582 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1583 instructions
->push_tail(var
);
1585 /* There are three kinds of matrix constructors.
1587 * - Construct a matrix from a single scalar by replicating that scalar to
1588 * along the diagonal of the matrix and setting all other components to
1591 * - Construct a matrix from an arbirary combination of vectors and
1592 * scalars. The components of the constructor parameters are assigned
1593 * to the matrix in column-major order until the matrix is full.
1595 * - Construct a matrix from a single matrix. The source matrix is copied
1596 * to the upper left portion of the constructed matrix, and the remaining
1597 * elements take values from the identity matrix.
1599 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1600 if (single_scalar_parameter(parameters
)) {
1601 /* Assign the scalar to the X component of a vec4, and fill the remaining
1602 * components with zero.
1604 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1605 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1606 ir_variable
*rhs_var
=
1607 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1610 instructions
->push_tail(rhs_var
);
1612 ir_constant_data zero
;
1613 for (unsigned i
= 0; i
< 4; i
++)
1614 if (first_param
->type
->is_float())
1619 ir_instruction
*inst
=
1620 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1621 new(ctx
) ir_constant(rhs_var
->type
, &zero
));
1622 instructions
->push_tail(inst
);
1624 ir_dereference
*const rhs_ref
=
1625 new(ctx
) ir_dereference_variable(rhs_var
);
1627 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1628 instructions
->push_tail(inst
);
1630 /* Assign the temporary vector to each column of the destination matrix
1631 * with a swizzle that puts the X component on the diagonal of the
1632 * matrix. In some cases this may mean that the X component does not
1633 * get assigned into the column at all (i.e., when the matrix has more
1634 * columns than rows).
1636 static const unsigned rhs_swiz
[4][4] = {
1643 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1644 type
->vector_elements
);
1645 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1646 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1647 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1650 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1651 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1652 type
->vector_elements
);
1654 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1655 instructions
->push_tail(inst
);
1658 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1659 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1660 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1663 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1664 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1665 type
->vector_elements
);
1667 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1668 instructions
->push_tail(inst
);
1670 } else if (first_param
->type
->is_matrix()) {
1671 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1673 * "If a matrix is constructed from a matrix, then each component
1674 * (column i, row j) in the result that has a corresponding
1675 * component (column i, row j) in the argument will be initialized
1676 * from there. All other components will be initialized to the
1677 * identity matrix. If a matrix argument is given to a matrix
1678 * constructor, it is an error to have any other arguments."
1680 assert(first_param
->next
->is_tail_sentinel());
1681 ir_rvalue
*const src_matrix
= first_param
;
1683 /* If the source matrix is smaller, pre-initialize the relavent parts of
1684 * the destination matrix to the identity matrix.
1686 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1687 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1689 /* If the source matrix has fewer rows, every column of the
1690 * destination must be initialized. Otherwise only the columns in
1691 * the destination that do not exist in the source must be
1695 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1696 ? 0 : src_matrix
->type
->matrix_columns
;
1698 const glsl_type
*const col_type
= var
->type
->column_type();
1699 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1700 ir_constant_data ident
;
1702 if (!col_type
->is_double()) {
1707 ident
.f
[col
] = 1.0f
;
1716 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1718 ir_rvalue
*const lhs
=
1719 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1721 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
);
1722 instructions
->push_tail(inst
);
1726 /* Assign columns from the source matrix to the destination matrix.
1728 * Since the parameter will be used in the RHS of multiple assignments,
1729 * generate a temporary and copy the paramter there.
1731 ir_variable
*const rhs_var
=
1732 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1734 instructions
->push_tail(rhs_var
);
1736 ir_dereference
*const rhs_var_ref
=
1737 new(ctx
) ir_dereference_variable(rhs_var
);
1738 ir_instruction
*const inst
=
1739 new(ctx
) ir_assignment(rhs_var_ref
, first_param
);
1740 instructions
->push_tail(inst
);
1742 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1743 var
->type
->vector_elements
);
1744 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1745 var
->type
->matrix_columns
);
1747 unsigned swiz
[4] = { 0, 0, 0, 0 };
1748 for (unsigned i
= 1; i
< last_row
; i
++)
1751 const unsigned write_mask
= (1U << last_row
) - 1;
1753 for (unsigned i
= 0; i
< last_col
; i
++) {
1754 ir_dereference
*const lhs
=
1755 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1756 ir_rvalue
*const rhs_col
=
1757 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1759 /* If one matrix has columns that are smaller than the columns of the
1760 * other matrix, wrap the column access of the larger with a swizzle
1761 * so that the LHS and RHS of the assignment have the same size (and
1762 * therefore have the same type).
1764 * It would be perfectly valid to unconditionally generate the
1765 * swizzles, this this will typically result in a more compact IR
1769 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1770 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1775 ir_instruction
*inst
=
1776 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1777 instructions
->push_tail(inst
);
1780 const unsigned cols
= type
->matrix_columns
;
1781 const unsigned rows
= type
->vector_elements
;
1782 unsigned remaining_slots
= rows
* cols
;
1783 unsigned col_idx
= 0;
1784 unsigned row_idx
= 0;
1786 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1787 unsigned rhs_components
= rhs
->type
->components();
1788 unsigned rhs_base
= 0;
1790 if (remaining_slots
== 0)
1793 /* Since the parameter might be used in the RHS of two assignments,
1794 * generate a temporary and copy the paramter there.
1796 ir_variable
*rhs_var
=
1797 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1798 instructions
->push_tail(rhs_var
);
1800 ir_dereference
*rhs_var_ref
=
1801 new(ctx
) ir_dereference_variable(rhs_var
);
1802 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
);
1803 instructions
->push_tail(inst
);
1806 /* Assign the current parameter to as many components of the matrix
1809 * NOTE: A single vector parameter can span two matrix columns. A
1810 * single vec4, for example, can completely fill a mat2.
1812 unsigned count
= MIN2(rows
- row_idx
,
1813 rhs_components
- rhs_base
);
1815 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1816 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1821 instructions
->push_tail(inst
);
1824 remaining_slots
-= count
;
1826 /* Sometimes, there is still data left in the parameters and
1827 * components left to be set in the destination but in other
1830 if (row_idx
>= rows
) {
1834 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1838 return new(ctx
) ir_dereference_variable(var
);
1843 emit_inline_record_constructor(const glsl_type
*type
,
1844 exec_list
*instructions
,
1845 exec_list
*parameters
,
1848 ir_variable
*const var
=
1849 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1850 ir_dereference_variable
*const d
=
1851 new(mem_ctx
) ir_dereference_variable(var
);
1853 instructions
->push_tail(var
);
1855 exec_node
*node
= parameters
->get_head_raw();
1856 for (unsigned i
= 0; i
< type
->length
; i
++) {
1857 assert(!node
->is_tail_sentinel());
1859 ir_dereference
*const lhs
=
1860 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1861 type
->fields
.structure
[i
].name
);
1863 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1864 assert(rhs
!= NULL
);
1866 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
1868 instructions
->push_tail(assign
);
1877 process_record_constructor(exec_list
*instructions
,
1878 const glsl_type
*constructor_type
,
1879 YYLTYPE
*loc
, exec_list
*parameters
,
1880 struct _mesa_glsl_parse_state
*state
)
1883 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1885 * "The arguments to the constructor will be used to set the structure's
1886 * fields, in order, using one argument per field. Each argument must
1887 * be the same type as the field it sets, or be a type that can be
1888 * converted to the field's type according to Section 4.1.10 “Implicit
1891 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1893 * "In all cases, the innermost initializer (i.e., not a list of
1894 * initializers enclosed in curly braces) applied to an object must
1895 * have the same type as the object being initialized or be a type that
1896 * can be converted to the object's type according to section 4.1.10
1897 * "Implicit Conversions". In the latter case, an implicit conversion
1898 * will be done on the initializer before the assignment is done."
1900 exec_list actual_parameters
;
1902 const unsigned parameter_count
=
1903 process_parameters(instructions
, &actual_parameters
, parameters
,
1906 if (parameter_count
!= constructor_type
->length
) {
1907 _mesa_glsl_error(loc
, state
,
1908 "%s parameters in constructor for `%s'",
1909 parameter_count
> constructor_type
->length
1910 ? "too many": "insufficient",
1911 constructor_type
->name
);
1912 return ir_rvalue::error_value(ctx
);
1915 bool all_parameters_are_constant
= true;
1918 /* Type cast each parameter and, if possible, fold constants. */
1919 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1921 const glsl_struct_field
*struct_field
=
1922 &constructor_type
->fields
.structure
[i
];
1924 /* Apply implicit conversions (not the scalar constructor rules, see the
1925 * spec quote above!) and attempt to convert the parameter to a constant
1926 * valued expression. After doing so, track whether or not all the
1927 * parameters to the constructor are trivially constant valued
1930 all_parameters_are_constant
&=
1931 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1934 if (ir
->type
!= struct_field
->type
) {
1935 _mesa_glsl_error(loc
, state
,
1936 "parameter type mismatch in constructor for `%s.%s' "
1938 constructor_type
->name
,
1941 struct_field
->type
->name
);
1942 return ir_rvalue::error_value(ctx
);
1948 if (all_parameters_are_constant
) {
1949 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1951 return emit_inline_record_constructor(constructor_type
, instructions
,
1952 &actual_parameters
, state
);
1957 ast_function_expression::handle_method(exec_list
*instructions
,
1958 struct _mesa_glsl_parse_state
*state
)
1960 const ast_expression
*field
= subexpressions
[0];
1964 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1965 YYLTYPE loc
= get_location();
1966 state
->check_version(120, 300, &loc
, "methods not supported");
1969 method
= field
->primary_expression
.identifier
;
1971 /* This would prevent to raise "uninitialized variable" warnings when
1972 * calling array.length.
1974 field
->subexpressions
[0]->set_is_lhs(true);
1975 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1976 if (strcmp(method
, "length") == 0) {
1977 if (!this->expressions
.is_empty()) {
1978 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1982 if (op
->type
->is_array()) {
1983 if (op
->type
->is_unsized_array()) {
1984 if (!state
->has_shader_storage_buffer_objects()) {
1985 _mesa_glsl_error(&loc
, state
,
1986 "length called on unsized array"
1987 " only available with"
1988 " ARB_shader_storage_buffer_object");
1990 /* Calculate length of an unsized array in run-time */
1991 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
1994 result
= new(ctx
) ir_constant(op
->type
->array_size());
1996 } else if (op
->type
->is_vector()) {
1997 if (state
->has_420pack()) {
1998 /* .length() returns int. */
1999 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
2001 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2002 " available with ARB_shading_language_420pack");
2005 } else if (op
->type
->is_matrix()) {
2006 if (state
->has_420pack()) {
2007 /* .length() returns int. */
2008 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
2010 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2011 " available with ARB_shading_language_420pack");
2015 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
2019 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
2024 return ir_rvalue::error_value(ctx
);
2027 static inline bool is_valid_constructor(const glsl_type
*type
,
2028 struct _mesa_glsl_parse_state
*state
)
2030 return type
->is_numeric() || type
->is_boolean() ||
2031 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
2035 ast_function_expression::hir(exec_list
*instructions
,
2036 struct _mesa_glsl_parse_state
*state
)
2039 /* There are three sorts of function calls.
2041 * 1. constructors - The first subexpression is an ast_type_specifier.
2042 * 2. methods - Only the .length() method of array types.
2043 * 3. functions - Calls to regular old functions.
2046 if (is_constructor()) {
2047 const ast_type_specifier
*type
=
2048 (ast_type_specifier
*) subexpressions
[0];
2049 YYLTYPE loc
= type
->get_location();
2052 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
2054 /* constructor_type can be NULL if a variable with the same name as the
2055 * structure has come into scope.
2057 if (constructor_type
== NULL
) {
2058 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
2059 "may be shadowed by a variable with the same name)",
2061 return ir_rvalue::error_value(ctx
);
2065 /* Constructors for opaque types are illegal.
2067 * From section 4.1.7 of the ARB_bindless_texture spec:
2069 * "Samplers are represented using 64-bit integer handles, and may be "
2070 * converted to and from 64-bit integers using constructors."
2072 * From section 4.1.X of the ARB_bindless_texture spec:
2074 * "Images are represented using 64-bit integer handles, and may be
2075 * converted to and from 64-bit integers using constructors."
2077 if (constructor_type
->contains_atomic() ||
2078 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2079 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2080 state
->has_bindless() ? "atomic" : "opaque",
2081 constructor_type
->name
);
2082 return ir_rvalue::error_value(ctx
);
2085 if (constructor_type
->is_subroutine()) {
2086 _mesa_glsl_error(& loc
, state
,
2087 "subroutine name cannot be a constructor `%s'",
2088 constructor_type
->name
);
2089 return ir_rvalue::error_value(ctx
);
2092 if (constructor_type
->is_array()) {
2093 if (!state
->check_version(120, 300, &loc
,
2094 "array constructors forbidden")) {
2095 return ir_rvalue::error_value(ctx
);
2098 return process_array_constructor(instructions
, constructor_type
,
2099 & loc
, &this->expressions
, state
);
2103 /* There are two kinds of constructor calls. Constructors for arrays and
2104 * structures must have the exact number of arguments with matching types
2105 * in the correct order. These constructors follow essentially the same
2106 * type matching rules as functions.
2108 * Constructors for built-in language types, such as mat4 and vec2, are
2109 * free form. The only requirements are that the parameters must provide
2110 * enough values of the correct scalar type and that no arguments are
2111 * given past the last used argument.
2113 * When using the C-style initializer syntax from GLSL 4.20, constructors
2114 * must have the exact number of arguments with matching types in the
2117 if (constructor_type
->is_record()) {
2118 return process_record_constructor(instructions
, constructor_type
,
2119 &loc
, &this->expressions
,
2123 if (!is_valid_constructor(constructor_type
, state
))
2124 return ir_rvalue::error_value(ctx
);
2126 /* Total number of components of the type being constructed. */
2127 const unsigned type_components
= constructor_type
->components();
2129 /* Number of components from parameters that have actually been
2130 * consumed. This is used to perform several kinds of error checking.
2132 unsigned components_used
= 0;
2134 unsigned matrix_parameters
= 0;
2135 unsigned nonmatrix_parameters
= 0;
2136 exec_list actual_parameters
;
2138 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2139 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2141 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2143 * "It is an error to provide extra arguments beyond this
2144 * last used argument."
2146 if (components_used
>= type_components
) {
2147 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2149 constructor_type
->name
);
2150 return ir_rvalue::error_value(ctx
);
2153 if (!is_valid_constructor(result
->type
, state
)) {
2154 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2155 "non-numeric data type",
2156 constructor_type
->name
);
2157 return ir_rvalue::error_value(ctx
);
2160 /* Count the number of matrix and nonmatrix parameters. This
2161 * is used below to enforce some of the constructor rules.
2163 if (result
->type
->is_matrix())
2164 matrix_parameters
++;
2166 nonmatrix_parameters
++;
2168 actual_parameters
.push_tail(result
);
2169 components_used
+= result
->type
->components();
2172 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2174 * "It is an error to construct matrices from other matrices. This
2175 * is reserved for future use."
2177 if (matrix_parameters
> 0
2178 && constructor_type
->is_matrix()
2179 && !state
->check_version(120, 100, &loc
,
2180 "cannot construct `%s' from a matrix",
2181 constructor_type
->name
)) {
2182 return ir_rvalue::error_value(ctx
);
2185 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2187 * "If a matrix argument is given to a matrix constructor, it is
2188 * an error to have any other arguments."
2190 if ((matrix_parameters
> 0)
2191 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2192 && constructor_type
->is_matrix()) {
2193 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2194 "matrix must be only parameter",
2195 constructor_type
->name
);
2196 return ir_rvalue::error_value(ctx
);
2199 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2201 * "In these cases, there must be enough components provided in the
2202 * arguments to provide an initializer for every component in the
2203 * constructed value."
2205 if (components_used
< type_components
&& components_used
!= 1
2206 && matrix_parameters
== 0) {
2207 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2209 constructor_type
->name
);
2210 return ir_rvalue::error_value(ctx
);
2213 /* Matrices can never be consumed as is by any constructor but matrix
2214 * constructors. If the constructor type is not matrix, always break the
2215 * matrix up into a series of column vectors.
2217 if (!constructor_type
->is_matrix()) {
2218 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2219 if (!matrix
->type
->is_matrix())
2222 /* Create a temporary containing the matrix. */
2223 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2225 instructions
->push_tail(var
);
2226 instructions
->push_tail(
2227 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2229 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2231 /* Replace the matrix with dereferences of its columns. */
2232 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2233 matrix
->insert_before(
2234 new (ctx
) ir_dereference_array(var
,
2235 new(ctx
) ir_constant(i
)));
2241 bool all_parameters_are_constant
= true;
2243 /* Type cast each parameter and, if possible, fold constants.*/
2244 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2245 const glsl_type
*desired_type
;
2247 /* From section 5.4.1 of the ARB_bindless_texture spec:
2249 * "In the following four constructors, the low 32 bits of the sampler
2250 * type correspond to the .x component of the uvec2 and the high 32
2251 * bits correspond to the .y component."
2253 * uvec2(any sampler type) // Converts a sampler type to a
2254 * // pair of 32-bit unsigned integers
2255 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2257 * uvec2(any image type) // Converts an image type to a
2258 * // pair of 32-bit unsigned integers
2259 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2262 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2263 /* Convert a sampler/image type to a pair of 32-bit unsigned
2264 * integers as defined by ARB_bindless_texture.
2266 if (constructor_type
!= glsl_type::uvec2_type
) {
2267 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2268 "be converted to a pair of 32-bit unsigned "
2271 desired_type
= glsl_type::uvec2_type
;
2272 } else if (constructor_type
->is_sampler() ||
2273 constructor_type
->is_image()) {
2274 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2275 * type as defined by ARB_bindless_texture.
2277 if (ir
->type
!= glsl_type::uvec2_type
) {
2278 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2279 "be converted from a pair of 32-bit unsigned "
2282 desired_type
= constructor_type
;
2285 glsl_type::get_instance(constructor_type
->base_type
,
2286 ir
->type
->vector_elements
,
2287 ir
->type
->matrix_columns
);
2290 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2292 /* Attempt to convert the parameter to a constant valued expression.
2293 * After doing so, track whether or not all the parameters to the
2294 * constructor are trivially constant valued expressions.
2296 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2298 if (constant
!= NULL
)
2301 all_parameters_are_constant
= false;
2304 ir
->replace_with(result
);
2308 /* If all of the parameters are trivially constant, create a
2309 * constant representing the complete collection of parameters.
2311 if (all_parameters_are_constant
) {
2312 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2313 } else if (constructor_type
->is_scalar()) {
2314 return dereference_component((ir_rvalue
*)
2315 actual_parameters
.get_head_raw(),
2317 } else if (constructor_type
->is_vector()) {
2318 return emit_inline_vector_constructor(constructor_type
,
2323 assert(constructor_type
->is_matrix());
2324 return emit_inline_matrix_constructor(constructor_type
,
2329 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2330 return handle_method(instructions
, state
);
2332 const ast_expression
*id
= subexpressions
[0];
2333 const char *func_name
= NULL
;
2334 YYLTYPE loc
= get_location();
2335 exec_list actual_parameters
;
2336 ir_variable
*sub_var
= NULL
;
2337 ir_rvalue
*array_idx
= NULL
;
2339 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2342 if (id
->oper
== ast_array_index
) {
2343 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2344 id
->subexpressions
[0],
2345 id
->subexpressions
[1], &func_name
,
2346 &actual_parameters
);
2347 } else if (id
->oper
== ast_identifier
) {
2348 func_name
= id
->primary_expression
.identifier
;
2350 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2353 /* an error was emitted earlier */
2355 return ir_rvalue::error_value(ctx
);
2357 ir_function_signature
*sig
=
2358 match_function_by_name(func_name
, &actual_parameters
, state
);
2360 ir_rvalue
*value
= NULL
;
2362 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2367 no_matching_function_error(func_name
, &loc
,
2368 &actual_parameters
, state
);
2369 value
= ir_rvalue::error_value(ctx
);
2370 } else if (!verify_parameter_modes(state
, sig
,
2372 this->expressions
)) {
2373 /* an error has already been emitted */
2374 value
= ir_rvalue::error_value(ctx
);
2375 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2376 /* ftransform refers to global variables, and we don't have any code
2377 * for remapping the variable references in the built-in shader.
2380 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2381 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2382 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2383 new(ctx
) ir_dereference_variable(mvp
),
2384 new(ctx
) ir_dereference_variable(vtx
));
2386 if (state
->stage
== MESA_SHADER_TESS_CTRL
&&
2387 sig
->is_builtin() && strcmp(func_name
, "barrier") == 0) {
2388 if (state
->current_function
== NULL
||
2389 strcmp(state
->current_function
->function_name(), "main") != 0) {
2390 _mesa_glsl_error(&loc
, state
,
2391 "barrier() may only be used in main()");
2394 if (state
->found_return
) {
2395 _mesa_glsl_error(&loc
, state
,
2396 "barrier() may not be used after return");
2399 if (instructions
!= &state
->current_function
->body
) {
2400 _mesa_glsl_error(&loc
, state
,
2401 "barrier() may not be used in control flow");
2405 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2408 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2411 instructions
->push_tail(tmp
);
2412 value
= new(ctx
) ir_dereference_variable(tmp
);
2419 unreachable("not reached");
2423 ast_function_expression::has_sequence_subexpression() const
2425 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2426 if (ast
->has_sequence_subexpression())
2434 ast_aggregate_initializer::hir(exec_list
*instructions
,
2435 struct _mesa_glsl_parse_state
*state
)
2438 YYLTYPE loc
= this->get_location();
2440 if (!this->constructor_type
) {
2441 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2442 return ir_rvalue::error_value(ctx
);
2444 const glsl_type
*const constructor_type
= this->constructor_type
;
2446 if (!state
->has_420pack()) {
2447 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2448 "GL_ARB_shading_language_420pack extension");
2449 return ir_rvalue::error_value(ctx
);
2452 if (constructor_type
->is_array()) {
2453 return process_array_constructor(instructions
, constructor_type
, &loc
,
2454 &this->expressions
, state
);
2457 if (constructor_type
->is_record()) {
2458 return process_record_constructor(instructions
, constructor_type
, &loc
,
2459 &this->expressions
, state
);
2462 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2463 &this->expressions
, state
);