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 ir_variable
*var
= idx
->variable_referenced();
368 /* If the index is read only it cannot change so there is no need
371 if (!var
|| var
->data
.read_only
|| var
->data
.memory_read_only
)
374 ir_variable
*tmp
= new(d
->mem_ctx
) ir_variable(idx
->type
, "idx_tmp",
376 d
->before_instructions
->push_tail(tmp
);
378 ir_dereference_variable
*const deref_tmp_1
=
379 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
380 ir_assignment
*const assignment
=
381 new(d
->mem_ctx
) ir_assignment(deref_tmp_1
,
382 idx
->clone(d
->mem_ctx
, NULL
));
383 d
->before_instructions
->push_tail(assignment
);
385 /* Replace the array index with a dereference of the new temporary */
386 ir_dereference_variable
*const deref_tmp_2
=
387 new(d
->mem_ctx
) ir_dereference_variable(tmp
);
388 a
->array_index
= deref_tmp_2
;
393 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
394 exec_list
*before_instructions
, exec_list
*after_instructions
,
395 bool parameter_is_inout
)
397 ir_expression
*const expr
= actual
->as_expression();
399 /* If the types match exactly and the parameter is not a vector-extract,
400 * nothing needs to be done to fix the parameter.
402 if (formal_type
== actual
->type
403 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
)
404 && actual
->as_dereference_variable())
407 /* An array index could also be an out variable so we need to make a copy
408 * of them before the function is called.
410 if (!actual
->as_dereference_variable()) {
411 struct copy_index_deref_data data
;
412 data
.mem_ctx
= mem_ctx
;
413 data
.before_instructions
= before_instructions
;
415 visit_tree(actual
, copy_index_derefs_to_temps
, &data
);
418 /* To convert an out parameter, we need to create a temporary variable to
419 * hold the value before conversion, and then perform the conversion after
420 * the function call returns.
422 * This has the effect of transforming code like this:
428 * Into IR that's equivalent to this:
432 * int out_parameter_conversion;
433 * f(out_parameter_conversion);
434 * value = float(out_parameter_conversion);
436 * If the parameter is an ir_expression of ir_binop_vector_extract,
437 * additional conversion is needed in the post-call re-write.
440 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
442 before_instructions
->push_tail(tmp
);
444 /* If the parameter is an inout parameter, copy the value of the actual
445 * parameter to the new temporary. Note that no type conversion is allowed
446 * here because inout parameters must match types exactly.
448 if (parameter_is_inout
) {
449 /* Inout parameters should never require conversion, since that would
450 * require an implicit conversion to exist both to and from the formal
451 * parameter type, and there are no bidirectional implicit conversions.
453 assert (actual
->type
== formal_type
);
455 ir_dereference_variable
*const deref_tmp_1
=
456 new(mem_ctx
) ir_dereference_variable(tmp
);
457 ir_assignment
*const assignment
=
458 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
->clone(mem_ctx
, NULL
));
459 before_instructions
->push_tail(assignment
);
462 /* Replace the parameter in the call with a dereference of the new
465 ir_dereference_variable
*const deref_tmp_2
=
466 new(mem_ctx
) ir_dereference_variable(tmp
);
467 actual
->replace_with(deref_tmp_2
);
470 /* Copy the temporary variable to the actual parameter with optional
471 * type conversion applied.
473 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
474 if (actual
->type
!= formal_type
)
475 rhs
= convert_component(rhs
, actual
->type
);
477 ir_rvalue
*lhs
= actual
;
478 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
479 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
481 expr
->operands
[1]->clone(mem_ctx
,
485 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
486 after_instructions
->push_tail(assignment_2
);
490 * Generate a function call.
492 * For non-void functions, this returns a dereference of the temporary
493 * variable which stores the return value for the call. For void functions,
497 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
498 exec_list
*actual_parameters
,
499 ir_variable
*sub_var
,
500 ir_rvalue
*array_idx
,
501 struct _mesa_glsl_parse_state
*state
)
504 exec_list post_call_conversions
;
506 /* Perform implicit conversion of arguments. For out parameters, we need
507 * to place them in a temporary variable and do the conversion after the
508 * call takes place. Since we haven't emitted the call yet, we'll place
509 * the post-call conversions in a temporary exec_list, and emit them later.
511 foreach_two_lists(formal_node
, &sig
->parameters
,
512 actual_node
, actual_parameters
) {
513 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
514 ir_variable
*formal
= (ir_variable
*) formal_node
;
516 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
517 switch (formal
->data
.mode
) {
518 case ir_var_const_in
:
519 case ir_var_function_in
: {
521 = convert_component(actual
, formal
->type
);
522 actual
->replace_with(converted
);
525 case ir_var_function_out
:
526 case ir_var_function_inout
:
527 fix_parameter(ctx
, actual
, formal
->type
,
528 instructions
, &post_call_conversions
,
529 formal
->data
.mode
== ir_var_function_inout
);
532 assert (!"Illegal formal parameter mode");
538 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
540 * "Initializers for const declarations must be formed from literal
541 * values, other const variables (not including function call
542 * paramaters), or expressions of these.
544 * Constructors may be used in such expressions, but function calls may
547 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
549 * "A constant expression is one of
553 * - a built-in function call whose arguments are all constant
554 * expressions, with the exception of the texture lookup
555 * functions, the noise functions, and ftransform. The built-in
556 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
557 * inside an initializer with an argument that is a constant
560 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
562 * "A constant expression is one of
566 * - a built-in function call whose arguments are all constant
567 * expressions, with the exception of the texture lookup
570 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
572 * "A constant expression is one of
576 * - a built-in function call whose arguments are all constant
577 * expressions, with the exception of the texture lookup
578 * functions. The built-in functions dFdx, dFdy, and fwidth must
579 * return 0 when evaluated inside an initializer with an argument
580 * that is a constant expression."
582 * If the function call is a constant expression, don't generate any
583 * instructions; just generate an ir_constant.
585 if (state
->is_version(120, 100) ||
586 state
->ctx
->Const
.AllowGLSLBuiltinConstantExpression
) {
587 ir_constant
*value
= sig
->constant_expression_value(ctx
,
595 ir_dereference_variable
*deref
= NULL
;
596 if (!sig
->return_type
->is_void()) {
597 /* Create a new temporary to hold the return value. */
598 char *const name
= ir_variable::temporaries_allocate_names
599 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
604 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
605 instructions
->push_tail(var
);
609 deref
= new(ctx
) ir_dereference_variable(var
);
612 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
613 actual_parameters
, sub_var
, array_idx
);
614 instructions
->push_tail(call
);
615 if (sig
->is_builtin()) {
616 /* inline immediately */
617 call
->generate_inline(call
);
621 /* Also emit any necessary out-parameter conversions. */
622 instructions
->append_list(&post_call_conversions
);
624 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
628 * Given a function name and parameter list, find the matching signature.
630 static ir_function_signature
*
631 match_function_by_name(const char *name
,
632 exec_list
*actual_parameters
,
633 struct _mesa_glsl_parse_state
*state
)
635 ir_function
*f
= state
->symbols
->get_function(name
);
636 ir_function_signature
*local_sig
= NULL
;
637 ir_function_signature
*sig
= NULL
;
639 /* Is the function hidden by a record type constructor? */
640 if (state
->symbols
->get_type(name
))
641 return sig
; /* no match */
643 /* Is the function hidden by a variable (impossible in 1.10)? */
644 if (!state
->symbols
->separate_function_namespace
645 && state
->symbols
->get_variable(name
))
646 return sig
; /* no match */
649 /* In desktop GL, the presence of a user-defined signature hides any
650 * built-in signatures, so we must ignore them. In contrast, in ES2
651 * user-defined signatures add new overloads, so we must consider them.
653 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
655 /* Look for a match in the local shader. If exact, we're done. */
656 bool is_exact
= false;
657 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
658 allow_builtins
, &is_exact
);
666 /* Local shader has no exact candidates; check the built-ins. */
667 _mesa_glsl_initialize_builtin_functions();
668 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
670 /* if _mesa_glsl_find_builtin_function failed, fall back to the result
671 * of choose_best_inexact_overload() instead. This should only affect
674 return sig
? sig
: local_sig
;
677 static ir_function_signature
*
678 match_subroutine_by_name(const char *name
,
679 exec_list
*actual_parameters
,
680 struct _mesa_glsl_parse_state
*state
,
684 ir_function_signature
*sig
= NULL
;
685 ir_function
*f
, *found
= NULL
;
686 const char *new_name
;
688 bool is_exact
= false;
691 ralloc_asprintf(ctx
, "%s_%s",
692 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
694 var
= state
->symbols
->get_variable(new_name
);
698 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
699 f
= state
->subroutine_types
[i
];
700 if (strcmp(f
->name
, var
->type
->without_array()->name
))
709 sig
= found
->matching_signature(state
, actual_parameters
,
715 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
716 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
717 const ast_expression
*array
, ast_expression
*idx
,
718 const char **function_name
, exec_list
*actual_parameters
)
720 if (array
->oper
== ast_array_index
) {
721 /* This handles arrays of arrays */
722 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
724 array
->subexpressions
[0],
725 array
->subexpressions
[1],
728 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
730 YYLTYPE index_loc
= idx
->get_location();
731 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
732 outer_array_idx
, loc
,
735 ir_variable
*sub_var
= NULL
;
736 *function_name
= array
->primary_expression
.identifier
;
738 if (!match_subroutine_by_name(*function_name
, actual_parameters
,
740 _mesa_glsl_error(&loc
, state
, "Unknown subroutine `%s'",
742 *function_name
= NULL
; /* indicate error condition to caller */
746 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
747 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
752 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
758 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
759 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
762 char *str
= prototype_string(sig
->return_type
, f
->name
,
764 _mesa_glsl_error(loc
, state
, " %s", str
);
770 * Raise a "no matching function" error, listing all possible overloads the
771 * compiler considered so developers can figure out what went wrong.
774 no_matching_function_error(const char *name
,
776 exec_list
*actual_parameters
,
777 _mesa_glsl_parse_state
*state
)
779 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
781 if (state
->symbols
->get_function(name
) == NULL
782 && (!state
->uses_builtin_functions
783 || sh
->symbols
->get_function(name
) == NULL
)) {
784 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
786 char *str
= prototype_string(NULL
, name
, actual_parameters
);
787 _mesa_glsl_error(loc
, state
,
788 "no matching function for call to `%s';"
793 print_function_prototypes(state
, loc
,
794 state
->symbols
->get_function(name
));
796 if (state
->uses_builtin_functions
) {
797 print_function_prototypes(state
, loc
,
798 sh
->symbols
->get_function(name
));
804 * Perform automatic type conversion of constructor parameters
806 * This implements the rules in the "Conversion and Scalar Constructors"
807 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
810 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
812 void *ctx
= ralloc_parent(src
);
813 const unsigned a
= desired_type
->base_type
;
814 const unsigned b
= src
->type
->base_type
;
815 ir_expression
*result
= NULL
;
817 if (src
->type
->is_error())
820 assert(a
<= GLSL_TYPE_IMAGE
);
821 assert(b
<= GLSL_TYPE_IMAGE
);
830 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
832 case GLSL_TYPE_FLOAT
:
833 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
836 result
= new(ctx
) ir_expression(ir_unop_i2u
,
837 new(ctx
) ir_expression(ir_unop_b2i
,
840 case GLSL_TYPE_DOUBLE
:
841 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
843 case GLSL_TYPE_UINT64
:
844 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
846 case GLSL_TYPE_INT64
:
847 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
849 case GLSL_TYPE_SAMPLER
:
850 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
852 case GLSL_TYPE_IMAGE
:
853 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
860 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
862 case GLSL_TYPE_FLOAT
:
863 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
866 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
868 case GLSL_TYPE_DOUBLE
:
869 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
871 case GLSL_TYPE_UINT64
:
872 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
874 case GLSL_TYPE_INT64
:
875 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
879 case GLSL_TYPE_FLOAT
:
882 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
885 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
888 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
890 case GLSL_TYPE_DOUBLE
:
891 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
893 case GLSL_TYPE_UINT64
:
894 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
896 case GLSL_TYPE_INT64
:
897 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
904 result
= new(ctx
) ir_expression(ir_unop_i2b
,
905 new(ctx
) ir_expression(ir_unop_u2i
,
909 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
911 case GLSL_TYPE_FLOAT
:
912 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
914 case GLSL_TYPE_DOUBLE
:
915 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
917 case GLSL_TYPE_UINT64
:
918 result
= new(ctx
) ir_expression(ir_unop_i642b
,
919 new(ctx
) ir_expression(ir_unop_u642i64
,
922 case GLSL_TYPE_INT64
:
923 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
927 case GLSL_TYPE_DOUBLE
:
930 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
933 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
936 result
= new(ctx
) ir_expression(ir_unop_f2d
,
937 new(ctx
) ir_expression(ir_unop_b2f
,
940 case GLSL_TYPE_FLOAT
:
941 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
943 case GLSL_TYPE_UINT64
:
944 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
946 case GLSL_TYPE_INT64
:
947 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
951 case GLSL_TYPE_UINT64
:
954 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
957 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
960 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
961 new(ctx
) ir_expression(ir_unop_b2i64
,
964 case GLSL_TYPE_FLOAT
:
965 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
967 case GLSL_TYPE_DOUBLE
:
968 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
970 case GLSL_TYPE_INT64
:
971 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
975 case GLSL_TYPE_INT64
:
978 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
981 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
984 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
986 case GLSL_TYPE_FLOAT
:
987 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
989 case GLSL_TYPE_DOUBLE
:
990 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
992 case GLSL_TYPE_UINT64
:
993 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
997 case GLSL_TYPE_SAMPLER
:
1001 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
1005 case GLSL_TYPE_IMAGE
:
1007 case GLSL_TYPE_UINT
:
1009 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
1015 assert(result
!= NULL
);
1016 assert(result
->type
== desired_type
);
1018 /* Try constant folding; it may fold in the conversion we just added. */
1019 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
1020 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
1025 * Perform automatic type and constant conversion of constructor parameters
1027 * This implements the rules in the "Implicit Conversions" rules, not the
1028 * "Conversion and Scalar Constructors".
1030 * After attempting the implicit conversion, an attempt to convert into a
1031 * constant valued expression is also done.
1033 * The \c from \c ir_rvalue is converted "in place".
1035 * \param from Operand that is being converted
1036 * \param to Base type the operand will be converted to
1037 * \param state GLSL compiler state
1040 * If the attempt to convert into a constant expression succeeds, \c true is
1041 * returned. Otherwise \c false is returned.
1044 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
1045 struct _mesa_glsl_parse_state
*state
)
1047 void *mem_ctx
= state
;
1048 ir_rvalue
*result
= from
;
1050 if (to
!= from
->type
->base_type
) {
1051 const glsl_type
*desired_type
=
1052 glsl_type::get_instance(to
,
1053 from
->type
->vector_elements
,
1054 from
->type
->matrix_columns
);
1056 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1057 /* Even though convert_component() implements the constructor
1058 * conversion rules (not the implicit conversion rules), its safe
1059 * to use it here because we already checked that the implicit
1060 * conversion is legal.
1062 result
= convert_component(from
, desired_type
);
1066 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
1068 if (constant
!= NULL
)
1071 if (from
!= result
) {
1072 from
->replace_with(result
);
1076 return constant
!= NULL
;
1081 * Dereference a specific component from a scalar, vector, or matrix
1084 dereference_component(ir_rvalue
*src
, unsigned component
)
1086 void *ctx
= ralloc_parent(src
);
1087 assert(component
< src
->type
->components());
1089 /* If the source is a constant, just create a new constant instead of a
1090 * dereference of the existing constant.
1092 ir_constant
*constant
= src
->as_constant();
1094 return new(ctx
) ir_constant(constant
, component
);
1096 if (src
->type
->is_scalar()) {
1098 } else if (src
->type
->is_vector()) {
1099 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1101 assert(src
->type
->is_matrix());
1103 /* Dereference a row of the matrix, then call this function again to get
1104 * a specific element from that row.
1106 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1107 const int r
= component
% src
->type
->column_type()->vector_elements
;
1108 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1109 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1112 col
->type
= src
->type
->column_type();
1114 return dereference_component(col
, r
);
1117 assert(!"Should not get here.");
1123 process_vec_mat_constructor(exec_list
*instructions
,
1124 const glsl_type
*constructor_type
,
1125 YYLTYPE
*loc
, exec_list
*parameters
,
1126 struct _mesa_glsl_parse_state
*state
)
1130 /* The ARB_shading_language_420pack spec says:
1132 * "If an initializer is a list of initializers enclosed in curly braces,
1133 * the variable being declared must be a vector, a matrix, an array, or a
1136 * int i = { 1 }; // illegal, i is not an aggregate"
1138 if (constructor_type
->vector_elements
<= 1) {
1139 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1140 "matrices, arrays, and structs");
1141 return ir_rvalue::error_value(ctx
);
1144 exec_list actual_parameters
;
1145 const unsigned parameter_count
=
1146 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1148 if (parameter_count
== 0
1149 || (constructor_type
->is_vector() &&
1150 constructor_type
->vector_elements
!= parameter_count
)
1151 || (constructor_type
->is_matrix() &&
1152 constructor_type
->matrix_columns
!= parameter_count
)) {
1153 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1154 constructor_type
->is_vector() ? "vector" : "matrix",
1155 constructor_type
->vector_elements
);
1156 return ir_rvalue::error_value(ctx
);
1159 bool all_parameters_are_constant
= true;
1161 /* Type cast each parameter and, if possible, fold constants. */
1162 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1163 /* Apply implicit conversions (not the scalar constructor rules, see the
1164 * spec quote above!) and attempt to convert the parameter to a constant
1165 * valued expression. After doing so, track whether or not all the
1166 * parameters to the constructor are trivially constant valued
1169 all_parameters_are_constant
&=
1170 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1172 if (constructor_type
->is_matrix()) {
1173 if (ir
->type
!= constructor_type
->column_type()) {
1174 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1175 "expected: %s, found %s",
1176 constructor_type
->column_type()->name
,
1178 return ir_rvalue::error_value(ctx
);
1180 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1181 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1182 "expected: %s, found %s",
1183 constructor_type
->get_scalar_type()->name
,
1185 return ir_rvalue::error_value(ctx
);
1189 if (all_parameters_are_constant
)
1190 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1192 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1194 instructions
->push_tail(var
);
1198 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1199 ir_instruction
*assignment
= NULL
;
1201 if (var
->type
->is_matrix()) {
1203 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1204 assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1206 /* use writemask rather than index for vector */
1207 assert(var
->type
->is_vector());
1209 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1210 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1211 (unsigned)(1 << i
));
1214 instructions
->push_tail(assignment
);
1219 return new(ctx
) ir_dereference_variable(var
);
1224 process_array_constructor(exec_list
*instructions
,
1225 const glsl_type
*constructor_type
,
1226 YYLTYPE
*loc
, exec_list
*parameters
,
1227 struct _mesa_glsl_parse_state
*state
)
1230 /* Array constructors come in two forms: sized and unsized. Sized array
1231 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1232 * variables. In this case the number of parameters must exactly match the
1233 * specified size of the array.
1235 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1236 * are vec4 variables. In this case the size of the array being constructed
1237 * is determined by the number of parameters.
1239 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1241 * "There must be exactly the same number of arguments as the size of
1242 * the array being constructed. If no size is present in the
1243 * constructor, then the array is explicitly sized to the number of
1244 * arguments provided. The arguments are assigned in order, starting at
1245 * element 0, to the elements of the constructed array. Each argument
1246 * must be the same type as the element type of the array, or be a type
1247 * that can be converted to the element type of the array according to
1248 * Section 4.1.10 "Implicit Conversions.""
1250 exec_list actual_parameters
;
1251 const unsigned parameter_count
=
1252 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1253 bool is_unsized_array
= constructor_type
->is_unsized_array();
1255 if ((parameter_count
== 0) ||
1256 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1257 const unsigned min_param
= is_unsized_array
1258 ? 1 : constructor_type
->length
;
1260 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1262 is_unsized_array
? "at least" : "exactly",
1263 min_param
, (min_param
<= 1) ? "" : "s");
1264 return ir_rvalue::error_value(ctx
);
1267 if (is_unsized_array
) {
1269 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1271 assert(constructor_type
!= NULL
);
1272 assert(constructor_type
->length
== parameter_count
);
1275 bool all_parameters_are_constant
= true;
1276 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1278 /* Type cast each parameter and, if possible, fold constants. */
1279 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1280 /* Apply implicit conversions (not the scalar constructor rules, see the
1281 * spec quote above!) and attempt to convert the parameter to a constant
1282 * valued expression. After doing so, track whether or not all the
1283 * parameters to the constructor are trivially constant valued
1286 all_parameters_are_constant
&=
1287 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1289 if (constructor_type
->fields
.array
->is_unsized_array()) {
1290 /* As the inner parameters of the constructor are created without
1291 * knowledge of each other we need to check to make sure unsized
1292 * parameters of unsized constructors all end up with the same size.
1294 * e.g we make sure to fail for a constructor like this:
1295 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1296 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1297 * vec4[](vec4(0.0), vec4(1.0)));
1299 if (element_type
->is_unsized_array()) {
1300 /* This is the first parameter so just get the type */
1301 element_type
= ir
->type
;
1302 } else if (element_type
!= ir
->type
) {
1303 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1304 "expected: %s, found %s",
1307 return ir_rvalue::error_value(ctx
);
1309 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1310 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1311 "expected: %s, found %s",
1312 constructor_type
->fields
.array
->name
,
1314 return ir_rvalue::error_value(ctx
);
1316 element_type
= ir
->type
;
1320 if (constructor_type
->fields
.array
->is_unsized_array()) {
1322 glsl_type::get_array_instance(element_type
,
1324 assert(constructor_type
!= NULL
);
1325 assert(constructor_type
->length
== parameter_count
);
1328 if (all_parameters_are_constant
)
1329 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1331 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1333 instructions
->push_tail(var
);
1336 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1337 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1338 new(ctx
) ir_constant(i
));
1340 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1341 instructions
->push_tail(assignment
);
1346 return new(ctx
) ir_dereference_variable(var
);
1351 * Determine if a list consists of a single scalar r-value
1354 single_scalar_parameter(exec_list
*parameters
)
1356 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1357 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1359 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1364 * Generate inline code for a vector constructor
1366 * The generated constructor code will consist of a temporary variable
1367 * declaration of the same type as the constructor. A sequence of assignments
1368 * from constructor parameters to the temporary will follow.
1371 * An \c ir_dereference_variable of the temprorary generated in the constructor
1375 emit_inline_vector_constructor(const glsl_type
*type
,
1376 exec_list
*instructions
,
1377 exec_list
*parameters
,
1380 assert(!parameters
->is_empty());
1382 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1383 instructions
->push_tail(var
);
1385 /* There are three kinds of vector constructors.
1387 * - Construct a vector from a single scalar by replicating that scalar to
1388 * all components of the vector.
1390 * - Construct a vector from at least a matrix. This case should already
1391 * have been taken care of in ast_function_expression::hir by breaking
1392 * down the matrix into a series of column vectors.
1394 * - Construct a vector from an arbirary combination of vectors and
1395 * scalars. The components of the constructor parameters are assigned
1396 * to the vector in order until the vector is full.
1398 const unsigned lhs_components
= type
->components();
1399 if (single_scalar_parameter(parameters
)) {
1400 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1401 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1403 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1404 const unsigned mask
= (1U << lhs_components
) - 1;
1406 assert(rhs
->type
== lhs
->type
);
1408 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1409 instructions
->push_tail(inst
);
1411 unsigned base_component
= 0;
1412 unsigned base_lhs_component
= 0;
1413 ir_constant_data data
;
1414 unsigned constant_mask
= 0, constant_components
= 0;
1416 memset(&data
, 0, sizeof(data
));
1418 foreach_in_list(ir_rvalue
, param
, parameters
) {
1419 unsigned rhs_components
= param
->type
->components();
1421 /* Do not try to assign more components to the vector than it has! */
1422 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1423 rhs_components
= lhs_components
- base_lhs_component
;
1426 const ir_constant
*const c
= param
->as_constant();
1428 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1429 switch (c
->type
->base_type
) {
1430 case GLSL_TYPE_UINT
:
1431 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1434 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1436 case GLSL_TYPE_FLOAT
:
1437 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1439 case GLSL_TYPE_DOUBLE
:
1440 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1442 case GLSL_TYPE_BOOL
:
1443 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1445 case GLSL_TYPE_UINT64
:
1446 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1448 case GLSL_TYPE_INT64
:
1449 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1452 assert(!"Should not get here.");
1457 /* Mask of fields to be written in the assignment. */
1458 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1459 constant_components
+= rhs_components
;
1461 base_component
+= rhs_components
;
1463 /* Advance the component index by the number of components
1464 * that were just assigned.
1466 base_lhs_component
+= rhs_components
;
1469 if (constant_mask
!= 0) {
1470 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1471 const glsl_type
*rhs_type
=
1472 glsl_type::get_instance(var
->type
->base_type
,
1473 constant_components
,
1475 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1477 ir_instruction
*inst
=
1478 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1479 instructions
->push_tail(inst
);
1483 foreach_in_list(ir_rvalue
, param
, parameters
) {
1484 unsigned rhs_components
= param
->type
->components();
1486 /* Do not try to assign more components to the vector than it has! */
1487 if ((rhs_components
+ base_component
) > lhs_components
) {
1488 rhs_components
= lhs_components
- base_component
;
1491 /* If we do not have any components left to copy, break out of the
1492 * loop. This can happen when initializing a vec4 with a mat3 as the
1493 * mat3 would have been broken into a series of column vectors.
1495 if (rhs_components
== 0) {
1499 const ir_constant
*const c
= param
->as_constant();
1501 /* Mask of fields to be written in the assignment. */
1502 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1505 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1507 /* Generate a swizzle so that LHS and RHS sizes match. */
1509 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1511 ir_instruction
*inst
=
1512 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1513 instructions
->push_tail(inst
);
1516 /* Advance the component index by the number of components that were
1519 base_component
+= rhs_components
;
1522 return new(ctx
) ir_dereference_variable(var
);
1527 * Generate assignment of a portion of a vector to a portion of a matrix column
1529 * \param src_base First component of the source to be used in assignment
1530 * \param column Column of destination to be assiged
1531 * \param row_base First component of the destination column to be assigned
1532 * \param count Number of components to be assigned
1535 * \c src_base + \c count must be less than or equal to the number of
1536 * components in the source vector.
1538 static ir_instruction
*
1539 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1540 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1543 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1544 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1547 assert(column_ref
->type
->components() >= (row_base
+ count
));
1548 assert(src
->type
->components() >= (src_base
+ count
));
1550 /* Generate a swizzle that extracts the number of components from the source
1551 * that are to be assigned to the column of the matrix.
1553 if (count
< src
->type
->vector_elements
) {
1554 src
= new(mem_ctx
) ir_swizzle(src
,
1555 src_base
+ 0, src_base
+ 1,
1556 src_base
+ 2, src_base
+ 3,
1560 /* Mask of fields to be written in the assignment. */
1561 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1563 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1568 * Generate inline code for a matrix constructor
1570 * The generated constructor code will consist of a temporary variable
1571 * declaration of the same type as the constructor. A sequence of assignments
1572 * from constructor parameters to the temporary will follow.
1575 * An \c ir_dereference_variable of the temprorary generated in the constructor
1579 emit_inline_matrix_constructor(const glsl_type
*type
,
1580 exec_list
*instructions
,
1581 exec_list
*parameters
,
1584 assert(!parameters
->is_empty());
1586 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1587 instructions
->push_tail(var
);
1589 /* There are three kinds of matrix constructors.
1591 * - Construct a matrix from a single scalar by replicating that scalar to
1592 * along the diagonal of the matrix and setting all other components to
1595 * - Construct a matrix from an arbirary combination of vectors and
1596 * scalars. The components of the constructor parameters are assigned
1597 * to the matrix in column-major order until the matrix is full.
1599 * - Construct a matrix from a single matrix. The source matrix is copied
1600 * to the upper left portion of the constructed matrix, and the remaining
1601 * elements take values from the identity matrix.
1603 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1604 if (single_scalar_parameter(parameters
)) {
1605 /* Assign the scalar to the X component of a vec4, and fill the remaining
1606 * components with zero.
1608 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1609 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1610 ir_variable
*rhs_var
=
1611 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1614 instructions
->push_tail(rhs_var
);
1616 ir_constant_data zero
;
1617 for (unsigned i
= 0; i
< 4; i
++)
1618 if (first_param
->type
->is_float())
1623 ir_instruction
*inst
=
1624 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1625 new(ctx
) ir_constant(rhs_var
->type
, &zero
));
1626 instructions
->push_tail(inst
);
1628 ir_dereference
*const rhs_ref
=
1629 new(ctx
) ir_dereference_variable(rhs_var
);
1631 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1632 instructions
->push_tail(inst
);
1634 /* Assign the temporary vector to each column of the destination matrix
1635 * with a swizzle that puts the X component on the diagonal of the
1636 * matrix. In some cases this may mean that the X component does not
1637 * get assigned into the column at all (i.e., when the matrix has more
1638 * columns than rows).
1640 static const unsigned rhs_swiz
[4][4] = {
1647 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1648 type
->vector_elements
);
1649 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1650 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1651 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1654 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1655 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1656 type
->vector_elements
);
1658 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1659 instructions
->push_tail(inst
);
1662 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1663 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1664 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1667 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1668 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1669 type
->vector_elements
);
1671 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1672 instructions
->push_tail(inst
);
1674 } else if (first_param
->type
->is_matrix()) {
1675 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1677 * "If a matrix is constructed from a matrix, then each component
1678 * (column i, row j) in the result that has a corresponding
1679 * component (column i, row j) in the argument will be initialized
1680 * from there. All other components will be initialized to the
1681 * identity matrix. If a matrix argument is given to a matrix
1682 * constructor, it is an error to have any other arguments."
1684 assert(first_param
->next
->is_tail_sentinel());
1685 ir_rvalue
*const src_matrix
= first_param
;
1687 /* If the source matrix is smaller, pre-initialize the relavent parts of
1688 * the destination matrix to the identity matrix.
1690 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1691 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1693 /* If the source matrix has fewer rows, every column of the
1694 * destination must be initialized. Otherwise only the columns in
1695 * the destination that do not exist in the source must be
1699 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1700 ? 0 : src_matrix
->type
->matrix_columns
;
1702 const glsl_type
*const col_type
= var
->type
->column_type();
1703 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1704 ir_constant_data ident
;
1706 if (!col_type
->is_double()) {
1711 ident
.f
[col
] = 1.0f
;
1720 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1722 ir_rvalue
*const lhs
=
1723 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1725 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
);
1726 instructions
->push_tail(inst
);
1730 /* Assign columns from the source matrix to the destination matrix.
1732 * Since the parameter will be used in the RHS of multiple assignments,
1733 * generate a temporary and copy the paramter there.
1735 ir_variable
*const rhs_var
=
1736 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1738 instructions
->push_tail(rhs_var
);
1740 ir_dereference
*const rhs_var_ref
=
1741 new(ctx
) ir_dereference_variable(rhs_var
);
1742 ir_instruction
*const inst
=
1743 new(ctx
) ir_assignment(rhs_var_ref
, first_param
);
1744 instructions
->push_tail(inst
);
1746 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1747 var
->type
->vector_elements
);
1748 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1749 var
->type
->matrix_columns
);
1751 unsigned swiz
[4] = { 0, 0, 0, 0 };
1752 for (unsigned i
= 1; i
< last_row
; i
++)
1755 const unsigned write_mask
= (1U << last_row
) - 1;
1757 for (unsigned i
= 0; i
< last_col
; i
++) {
1758 ir_dereference
*const lhs
=
1759 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1760 ir_rvalue
*const rhs_col
=
1761 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1763 /* If one matrix has columns that are smaller than the columns of the
1764 * other matrix, wrap the column access of the larger with a swizzle
1765 * so that the LHS and RHS of the assignment have the same size (and
1766 * therefore have the same type).
1768 * It would be perfectly valid to unconditionally generate the
1769 * swizzles, this this will typically result in a more compact IR
1773 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1774 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1779 ir_instruction
*inst
=
1780 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1781 instructions
->push_tail(inst
);
1784 const unsigned cols
= type
->matrix_columns
;
1785 const unsigned rows
= type
->vector_elements
;
1786 unsigned remaining_slots
= rows
* cols
;
1787 unsigned col_idx
= 0;
1788 unsigned row_idx
= 0;
1790 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1791 unsigned rhs_components
= rhs
->type
->components();
1792 unsigned rhs_base
= 0;
1794 if (remaining_slots
== 0)
1797 /* Since the parameter might be used in the RHS of two assignments,
1798 * generate a temporary and copy the paramter there.
1800 ir_variable
*rhs_var
=
1801 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1802 instructions
->push_tail(rhs_var
);
1804 ir_dereference
*rhs_var_ref
=
1805 new(ctx
) ir_dereference_variable(rhs_var
);
1806 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
);
1807 instructions
->push_tail(inst
);
1810 /* Assign the current parameter to as many components of the matrix
1813 * NOTE: A single vector parameter can span two matrix columns. A
1814 * single vec4, for example, can completely fill a mat2.
1816 unsigned count
= MIN2(rows
- row_idx
,
1817 rhs_components
- rhs_base
);
1819 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1820 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1825 instructions
->push_tail(inst
);
1828 remaining_slots
-= count
;
1830 /* Sometimes, there is still data left in the parameters and
1831 * components left to be set in the destination but in other
1834 if (row_idx
>= rows
) {
1838 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1842 return new(ctx
) ir_dereference_variable(var
);
1847 emit_inline_record_constructor(const glsl_type
*type
,
1848 exec_list
*instructions
,
1849 exec_list
*parameters
,
1852 ir_variable
*const var
=
1853 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1854 ir_dereference_variable
*const d
=
1855 new(mem_ctx
) ir_dereference_variable(var
);
1857 instructions
->push_tail(var
);
1859 exec_node
*node
= parameters
->get_head_raw();
1860 for (unsigned i
= 0; i
< type
->length
; i
++) {
1861 assert(!node
->is_tail_sentinel());
1863 ir_dereference
*const lhs
=
1864 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1865 type
->fields
.structure
[i
].name
);
1867 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1868 assert(rhs
!= NULL
);
1870 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
1872 instructions
->push_tail(assign
);
1881 process_record_constructor(exec_list
*instructions
,
1882 const glsl_type
*constructor_type
,
1883 YYLTYPE
*loc
, exec_list
*parameters
,
1884 struct _mesa_glsl_parse_state
*state
)
1887 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1889 * "The arguments to the constructor will be used to set the structure's
1890 * fields, in order, using one argument per field. Each argument must
1891 * be the same type as the field it sets, or be a type that can be
1892 * converted to the field's type according to Section 4.1.10 “Implicit
1895 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1897 * "In all cases, the innermost initializer (i.e., not a list of
1898 * initializers enclosed in curly braces) applied to an object must
1899 * have the same type as the object being initialized or be a type that
1900 * can be converted to the object's type according to section 4.1.10
1901 * "Implicit Conversions". In the latter case, an implicit conversion
1902 * will be done on the initializer before the assignment is done."
1904 exec_list actual_parameters
;
1906 const unsigned parameter_count
=
1907 process_parameters(instructions
, &actual_parameters
, parameters
,
1910 if (parameter_count
!= constructor_type
->length
) {
1911 _mesa_glsl_error(loc
, state
,
1912 "%s parameters in constructor for `%s'",
1913 parameter_count
> constructor_type
->length
1914 ? "too many": "insufficient",
1915 constructor_type
->name
);
1916 return ir_rvalue::error_value(ctx
);
1919 bool all_parameters_are_constant
= true;
1922 /* Type cast each parameter and, if possible, fold constants. */
1923 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1925 const glsl_struct_field
*struct_field
=
1926 &constructor_type
->fields
.structure
[i
];
1928 /* Apply implicit conversions (not the scalar constructor rules, see the
1929 * spec quote above!) and attempt to convert the parameter to a constant
1930 * valued expression. After doing so, track whether or not all the
1931 * parameters to the constructor are trivially constant valued
1934 all_parameters_are_constant
&=
1935 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1938 if (ir
->type
!= struct_field
->type
) {
1939 _mesa_glsl_error(loc
, state
,
1940 "parameter type mismatch in constructor for `%s.%s' "
1942 constructor_type
->name
,
1945 struct_field
->type
->name
);
1946 return ir_rvalue::error_value(ctx
);
1952 if (all_parameters_are_constant
) {
1953 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1955 return emit_inline_record_constructor(constructor_type
, instructions
,
1956 &actual_parameters
, state
);
1961 ast_function_expression::handle_method(exec_list
*instructions
,
1962 struct _mesa_glsl_parse_state
*state
)
1964 const ast_expression
*field
= subexpressions
[0];
1968 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1969 YYLTYPE loc
= get_location();
1970 state
->check_version(120, 300, &loc
, "methods not supported");
1973 method
= field
->primary_expression
.identifier
;
1975 /* This would prevent to raise "uninitialized variable" warnings when
1976 * calling array.length.
1978 field
->subexpressions
[0]->set_is_lhs(true);
1979 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1980 if (strcmp(method
, "length") == 0) {
1981 if (!this->expressions
.is_empty()) {
1982 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1986 if (op
->type
->is_array()) {
1987 if (op
->type
->is_unsized_array()) {
1988 if (!state
->has_shader_storage_buffer_objects()) {
1989 _mesa_glsl_error(&loc
, state
,
1990 "length called on unsized array"
1991 " only available with"
1992 " ARB_shader_storage_buffer_object");
1994 /* Calculate length of an unsized array in run-time */
1995 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
1998 result
= new(ctx
) ir_constant(op
->type
->array_size());
2000 } else if (op
->type
->is_vector()) {
2001 if (state
->has_420pack()) {
2002 /* .length() returns int. */
2003 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
2005 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2006 " available with ARB_shading_language_420pack");
2009 } else if (op
->type
->is_matrix()) {
2010 if (state
->has_420pack()) {
2011 /* .length() returns int. */
2012 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
2014 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2015 " available with ARB_shading_language_420pack");
2019 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
2023 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
2028 return ir_rvalue::error_value(ctx
);
2031 static inline bool is_valid_constructor(const glsl_type
*type
,
2032 struct _mesa_glsl_parse_state
*state
)
2034 return type
->is_numeric() || type
->is_boolean() ||
2035 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
2039 ast_function_expression::hir(exec_list
*instructions
,
2040 struct _mesa_glsl_parse_state
*state
)
2043 /* There are three sorts of function calls.
2045 * 1. constructors - The first subexpression is an ast_type_specifier.
2046 * 2. methods - Only the .length() method of array types.
2047 * 3. functions - Calls to regular old functions.
2050 if (is_constructor()) {
2051 const ast_type_specifier
*type
=
2052 (ast_type_specifier
*) subexpressions
[0];
2053 YYLTYPE loc
= type
->get_location();
2056 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
2058 /* constructor_type can be NULL if a variable with the same name as the
2059 * structure has come into scope.
2061 if (constructor_type
== NULL
) {
2062 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
2063 "may be shadowed by a variable with the same name)",
2065 return ir_rvalue::error_value(ctx
);
2069 /* Constructors for opaque types are illegal.
2071 * From section 4.1.7 of the ARB_bindless_texture spec:
2073 * "Samplers are represented using 64-bit integer handles, and may be "
2074 * converted to and from 64-bit integers using constructors."
2076 * From section 4.1.X of the ARB_bindless_texture spec:
2078 * "Images are represented using 64-bit integer handles, and may be
2079 * converted to and from 64-bit integers using constructors."
2081 if (constructor_type
->contains_atomic() ||
2082 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2083 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2084 state
->has_bindless() ? "atomic" : "opaque",
2085 constructor_type
->name
);
2086 return ir_rvalue::error_value(ctx
);
2089 if (constructor_type
->is_subroutine()) {
2090 _mesa_glsl_error(& loc
, state
,
2091 "subroutine name cannot be a constructor `%s'",
2092 constructor_type
->name
);
2093 return ir_rvalue::error_value(ctx
);
2096 if (constructor_type
->is_array()) {
2097 if (!state
->check_version(120, 300, &loc
,
2098 "array constructors forbidden")) {
2099 return ir_rvalue::error_value(ctx
);
2102 return process_array_constructor(instructions
, constructor_type
,
2103 & loc
, &this->expressions
, state
);
2107 /* There are two kinds of constructor calls. Constructors for arrays and
2108 * structures must have the exact number of arguments with matching types
2109 * in the correct order. These constructors follow essentially the same
2110 * type matching rules as functions.
2112 * Constructors for built-in language types, such as mat4 and vec2, are
2113 * free form. The only requirements are that the parameters must provide
2114 * enough values of the correct scalar type and that no arguments are
2115 * given past the last used argument.
2117 * When using the C-style initializer syntax from GLSL 4.20, constructors
2118 * must have the exact number of arguments with matching types in the
2121 if (constructor_type
->is_struct()) {
2122 return process_record_constructor(instructions
, constructor_type
,
2123 &loc
, &this->expressions
,
2127 if (!is_valid_constructor(constructor_type
, state
))
2128 return ir_rvalue::error_value(ctx
);
2130 /* Total number of components of the type being constructed. */
2131 const unsigned type_components
= constructor_type
->components();
2133 /* Number of components from parameters that have actually been
2134 * consumed. This is used to perform several kinds of error checking.
2136 unsigned components_used
= 0;
2138 unsigned matrix_parameters
= 0;
2139 unsigned nonmatrix_parameters
= 0;
2140 exec_list actual_parameters
;
2142 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2143 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2145 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2147 * "It is an error to provide extra arguments beyond this
2148 * last used argument."
2150 if (components_used
>= type_components
) {
2151 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2153 constructor_type
->name
);
2154 return ir_rvalue::error_value(ctx
);
2157 if (!is_valid_constructor(result
->type
, state
)) {
2158 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2159 "non-numeric data type",
2160 constructor_type
->name
);
2161 return ir_rvalue::error_value(ctx
);
2164 /* Count the number of matrix and nonmatrix parameters. This
2165 * is used below to enforce some of the constructor rules.
2167 if (result
->type
->is_matrix())
2168 matrix_parameters
++;
2170 nonmatrix_parameters
++;
2172 actual_parameters
.push_tail(result
);
2173 components_used
+= result
->type
->components();
2176 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2178 * "It is an error to construct matrices from other matrices. This
2179 * is reserved for future use."
2181 if (matrix_parameters
> 0
2182 && constructor_type
->is_matrix()
2183 && !state
->check_version(120, 100, &loc
,
2184 "cannot construct `%s' from a matrix",
2185 constructor_type
->name
)) {
2186 return ir_rvalue::error_value(ctx
);
2189 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2191 * "If a matrix argument is given to a matrix constructor, it is
2192 * an error to have any other arguments."
2194 if ((matrix_parameters
> 0)
2195 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2196 && constructor_type
->is_matrix()) {
2197 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2198 "matrix must be only parameter",
2199 constructor_type
->name
);
2200 return ir_rvalue::error_value(ctx
);
2203 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2205 * "In these cases, there must be enough components provided in the
2206 * arguments to provide an initializer for every component in the
2207 * constructed value."
2209 if (components_used
< type_components
&& components_used
!= 1
2210 && matrix_parameters
== 0) {
2211 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2213 constructor_type
->name
);
2214 return ir_rvalue::error_value(ctx
);
2217 /* Matrices can never be consumed as is by any constructor but matrix
2218 * constructors. If the constructor type is not matrix, always break the
2219 * matrix up into a series of column vectors.
2221 if (!constructor_type
->is_matrix()) {
2222 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2223 if (!matrix
->type
->is_matrix())
2226 /* Create a temporary containing the matrix. */
2227 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2229 instructions
->push_tail(var
);
2230 instructions
->push_tail(
2231 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2233 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2235 /* Replace the matrix with dereferences of its columns. */
2236 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2237 matrix
->insert_before(
2238 new (ctx
) ir_dereference_array(var
,
2239 new(ctx
) ir_constant(i
)));
2245 bool all_parameters_are_constant
= true;
2247 /* Type cast each parameter and, if possible, fold constants.*/
2248 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2249 const glsl_type
*desired_type
;
2251 /* From section 5.4.1 of the ARB_bindless_texture spec:
2253 * "In the following four constructors, the low 32 bits of the sampler
2254 * type correspond to the .x component of the uvec2 and the high 32
2255 * bits correspond to the .y component."
2257 * uvec2(any sampler type) // Converts a sampler type to a
2258 * // pair of 32-bit unsigned integers
2259 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2261 * uvec2(any image type) // Converts an image type to a
2262 * // pair of 32-bit unsigned integers
2263 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2266 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2267 /* Convert a sampler/image type to a pair of 32-bit unsigned
2268 * integers as defined by ARB_bindless_texture.
2270 if (constructor_type
!= glsl_type::uvec2_type
) {
2271 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2272 "be converted to a pair of 32-bit unsigned "
2275 desired_type
= glsl_type::uvec2_type
;
2276 } else if (constructor_type
->is_sampler() ||
2277 constructor_type
->is_image()) {
2278 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2279 * type as defined by ARB_bindless_texture.
2281 if (ir
->type
!= glsl_type::uvec2_type
) {
2282 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2283 "be converted from a pair of 32-bit unsigned "
2286 desired_type
= constructor_type
;
2289 glsl_type::get_instance(constructor_type
->base_type
,
2290 ir
->type
->vector_elements
,
2291 ir
->type
->matrix_columns
);
2294 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2296 /* Attempt to convert the parameter to a constant valued expression.
2297 * After doing so, track whether or not all the parameters to the
2298 * constructor are trivially constant valued expressions.
2300 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2302 if (constant
!= NULL
)
2305 all_parameters_are_constant
= false;
2308 ir
->replace_with(result
);
2312 /* If all of the parameters are trivially constant, create a
2313 * constant representing the complete collection of parameters.
2315 if (all_parameters_are_constant
) {
2316 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2317 } else if (constructor_type
->is_scalar()) {
2318 return dereference_component((ir_rvalue
*)
2319 actual_parameters
.get_head_raw(),
2321 } else if (constructor_type
->is_vector()) {
2322 return emit_inline_vector_constructor(constructor_type
,
2327 assert(constructor_type
->is_matrix());
2328 return emit_inline_matrix_constructor(constructor_type
,
2333 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2334 return handle_method(instructions
, state
);
2336 const ast_expression
*id
= subexpressions
[0];
2337 const char *func_name
= NULL
;
2338 YYLTYPE loc
= get_location();
2339 exec_list actual_parameters
;
2340 ir_variable
*sub_var
= NULL
;
2341 ir_rvalue
*array_idx
= NULL
;
2343 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2346 if (id
->oper
== ast_array_index
) {
2347 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2348 id
->subexpressions
[0],
2349 id
->subexpressions
[1], &func_name
,
2350 &actual_parameters
);
2351 } else if (id
->oper
== ast_identifier
) {
2352 func_name
= id
->primary_expression
.identifier
;
2354 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2357 /* an error was emitted earlier */
2359 return ir_rvalue::error_value(ctx
);
2361 ir_function_signature
*sig
=
2362 match_function_by_name(func_name
, &actual_parameters
, state
);
2364 ir_rvalue
*value
= NULL
;
2366 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2371 no_matching_function_error(func_name
, &loc
,
2372 &actual_parameters
, state
);
2373 value
= ir_rvalue::error_value(ctx
);
2374 } else if (!verify_parameter_modes(state
, sig
,
2376 this->expressions
)) {
2377 /* an error has already been emitted */
2378 value
= ir_rvalue::error_value(ctx
);
2379 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2380 /* ftransform refers to global variables, and we don't have any code
2381 * for remapping the variable references in the built-in shader.
2384 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2385 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2386 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2387 new(ctx
) ir_dereference_variable(mvp
),
2388 new(ctx
) ir_dereference_variable(vtx
));
2390 if (state
->stage
== MESA_SHADER_TESS_CTRL
&&
2391 sig
->is_builtin() && strcmp(func_name
, "barrier") == 0) {
2392 if (state
->current_function
== NULL
||
2393 strcmp(state
->current_function
->function_name(), "main") != 0) {
2394 _mesa_glsl_error(&loc
, state
,
2395 "barrier() may only be used in main()");
2398 if (state
->found_return
) {
2399 _mesa_glsl_error(&loc
, state
,
2400 "barrier() may not be used after return");
2403 if (instructions
!= &state
->current_function
->body
) {
2404 _mesa_glsl_error(&loc
, state
,
2405 "barrier() may not be used in control flow");
2409 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2412 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2415 instructions
->push_tail(tmp
);
2416 value
= new(ctx
) ir_dereference_variable(tmp
);
2423 unreachable("not reached");
2427 ast_function_expression::has_sequence_subexpression() const
2429 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2430 if (ast
->has_sequence_subexpression())
2438 ast_aggregate_initializer::hir(exec_list
*instructions
,
2439 struct _mesa_glsl_parse_state
*state
)
2442 YYLTYPE loc
= this->get_location();
2444 if (!this->constructor_type
) {
2445 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2446 return ir_rvalue::error_value(ctx
);
2448 const glsl_type
*const constructor_type
= this->constructor_type
;
2450 if (!state
->has_420pack()) {
2451 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2452 "GL_ARB_shading_language_420pack extension");
2453 return ir_rvalue::error_value(ctx
);
2456 if (constructor_type
->is_array()) {
2457 return process_array_constructor(instructions
, constructor_type
, &loc
,
2458 &this->expressions
, state
);
2461 if (constructor_type
->is_struct()) {
2462 return process_record_constructor(instructions
, constructor_type
, &loc
,
2463 &this->expressions
, state
);
2466 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2467 &this->expressions
, state
);