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
);
616 /* Also emit any necessary out-parameter conversions. */
617 instructions
->append_list(&post_call_conversions
);
619 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
623 * Given a function name and parameter list, find the matching signature.
625 static ir_function_signature
*
626 match_function_by_name(const char *name
,
627 exec_list
*actual_parameters
,
628 struct _mesa_glsl_parse_state
*state
)
630 ir_function
*f
= state
->symbols
->get_function(name
);
631 ir_function_signature
*local_sig
= NULL
;
632 ir_function_signature
*sig
= NULL
;
634 /* Is the function hidden by a record type constructor? */
635 if (state
->symbols
->get_type(name
))
636 return sig
; /* no match */
638 /* Is the function hidden by a variable (impossible in 1.10)? */
639 if (!state
->symbols
->separate_function_namespace
640 && state
->symbols
->get_variable(name
))
641 return sig
; /* no match */
644 /* In desktop GL, the presence of a user-defined signature hides any
645 * built-in signatures, so we must ignore them. In contrast, in ES2
646 * user-defined signatures add new overloads, so we must consider them.
648 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
650 /* Look for a match in the local shader. If exact, we're done. */
651 bool is_exact
= false;
652 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
653 allow_builtins
, &is_exact
);
661 /* Local shader has no exact candidates; check the built-ins. */
662 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
664 /* if _mesa_glsl_find_builtin_function failed, fall back to the result
665 * of choose_best_inexact_overload() instead. This should only affect
668 return sig
? sig
: local_sig
;
671 static ir_function_signature
*
672 match_subroutine_by_name(const char *name
,
673 exec_list
*actual_parameters
,
674 struct _mesa_glsl_parse_state
*state
,
678 ir_function_signature
*sig
= NULL
;
679 ir_function
*f
, *found
= NULL
;
680 const char *new_name
;
682 bool is_exact
= false;
685 ralloc_asprintf(ctx
, "%s_%s",
686 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
688 var
= state
->symbols
->get_variable(new_name
);
692 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
693 f
= state
->subroutine_types
[i
];
694 if (strcmp(f
->name
, var
->type
->without_array()->name
))
703 sig
= found
->matching_signature(state
, actual_parameters
,
709 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
710 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
711 const ast_expression
*array
, ast_expression
*idx
,
712 const char **function_name
, exec_list
*actual_parameters
)
714 if (array
->oper
== ast_array_index
) {
715 /* This handles arrays of arrays */
716 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
718 array
->subexpressions
[0],
719 array
->subexpressions
[1],
722 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
724 YYLTYPE index_loc
= idx
->get_location();
725 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
726 outer_array_idx
, loc
,
729 ir_variable
*sub_var
= NULL
;
730 *function_name
= array
->primary_expression
.identifier
;
732 if (!match_subroutine_by_name(*function_name
, actual_parameters
,
734 _mesa_glsl_error(&loc
, state
, "Unknown subroutine `%s'",
736 *function_name
= NULL
; /* indicate error condition to caller */
740 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
741 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
746 function_exists(_mesa_glsl_parse_state
*state
,
747 struct glsl_symbol_table
*symbols
, const char *name
)
749 ir_function
*f
= symbols
->get_function(name
);
751 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
752 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
761 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
767 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
768 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
771 char *str
= prototype_string(sig
->return_type
, f
->name
,
773 _mesa_glsl_error(loc
, state
, " %s", str
);
779 * Raise a "no matching function" error, listing all possible overloads the
780 * compiler considered so developers can figure out what went wrong.
783 no_matching_function_error(const char *name
,
785 exec_list
*actual_parameters
,
786 _mesa_glsl_parse_state
*state
)
788 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
790 if (!function_exists(state
, state
->symbols
, name
)
791 && (!state
->uses_builtin_functions
792 || !function_exists(state
, sh
->symbols
, name
))) {
793 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
795 char *str
= prototype_string(NULL
, name
, actual_parameters
);
796 _mesa_glsl_error(loc
, state
,
797 "no matching function for call to `%s';"
802 print_function_prototypes(state
, loc
,
803 state
->symbols
->get_function(name
));
805 if (state
->uses_builtin_functions
) {
806 print_function_prototypes(state
, loc
,
807 sh
->symbols
->get_function(name
));
813 * Perform automatic type conversion of constructor parameters
815 * This implements the rules in the "Conversion and Scalar Constructors"
816 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
819 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
821 void *ctx
= ralloc_parent(src
);
822 const unsigned a
= desired_type
->base_type
;
823 const unsigned b
= src
->type
->base_type
;
824 ir_expression
*result
= NULL
;
826 if (src
->type
->is_error())
829 assert(a
<= GLSL_TYPE_IMAGE
);
830 assert(b
<= GLSL_TYPE_IMAGE
);
839 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
841 case GLSL_TYPE_FLOAT
:
842 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
845 result
= new(ctx
) ir_expression(ir_unop_i2u
,
846 new(ctx
) ir_expression(ir_unop_b2i
,
849 case GLSL_TYPE_DOUBLE
:
850 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
852 case GLSL_TYPE_UINT64
:
853 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
855 case GLSL_TYPE_INT64
:
856 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
858 case GLSL_TYPE_SAMPLER
:
859 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
861 case GLSL_TYPE_IMAGE
:
862 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
869 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
871 case GLSL_TYPE_FLOAT
:
872 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
875 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
877 case GLSL_TYPE_DOUBLE
:
878 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
880 case GLSL_TYPE_UINT64
:
881 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
883 case GLSL_TYPE_INT64
:
884 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
888 case GLSL_TYPE_FLOAT
:
891 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
894 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
897 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
899 case GLSL_TYPE_DOUBLE
:
900 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
902 case GLSL_TYPE_UINT64
:
903 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
905 case GLSL_TYPE_INT64
:
906 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
913 result
= new(ctx
) ir_expression(ir_unop_i2b
,
914 new(ctx
) ir_expression(ir_unop_u2i
,
918 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
920 case GLSL_TYPE_FLOAT
:
921 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
923 case GLSL_TYPE_DOUBLE
:
924 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
926 case GLSL_TYPE_UINT64
:
927 result
= new(ctx
) ir_expression(ir_unop_i642b
,
928 new(ctx
) ir_expression(ir_unop_u642i64
,
931 case GLSL_TYPE_INT64
:
932 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
936 case GLSL_TYPE_DOUBLE
:
939 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
942 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
945 result
= new(ctx
) ir_expression(ir_unop_f2d
,
946 new(ctx
) ir_expression(ir_unop_b2f
,
949 case GLSL_TYPE_FLOAT
:
950 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
952 case GLSL_TYPE_UINT64
:
953 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
955 case GLSL_TYPE_INT64
:
956 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
960 case GLSL_TYPE_UINT64
:
963 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
966 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
969 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
970 new(ctx
) ir_expression(ir_unop_b2i64
,
973 case GLSL_TYPE_FLOAT
:
974 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
976 case GLSL_TYPE_DOUBLE
:
977 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
979 case GLSL_TYPE_INT64
:
980 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
984 case GLSL_TYPE_INT64
:
987 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
990 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
993 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
995 case GLSL_TYPE_FLOAT
:
996 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
998 case GLSL_TYPE_DOUBLE
:
999 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
1001 case GLSL_TYPE_UINT64
:
1002 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
1006 case GLSL_TYPE_SAMPLER
:
1008 case GLSL_TYPE_UINT
:
1010 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
1014 case GLSL_TYPE_IMAGE
:
1016 case GLSL_TYPE_UINT
:
1018 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
1024 assert(result
!= NULL
);
1025 assert(result
->type
== desired_type
);
1027 /* Try constant folding; it may fold in the conversion we just added. */
1028 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
1029 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
1034 * Perform automatic type and constant conversion of constructor parameters
1036 * This implements the rules in the "Implicit Conversions" rules, not the
1037 * "Conversion and Scalar Constructors".
1039 * After attempting the implicit conversion, an attempt to convert into a
1040 * constant valued expression is also done.
1042 * The \c from \c ir_rvalue is converted "in place".
1044 * \param from Operand that is being converted
1045 * \param to Base type the operand will be converted to
1046 * \param state GLSL compiler state
1049 * If the attempt to convert into a constant expression succeeds, \c true is
1050 * returned. Otherwise \c false is returned.
1053 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
1054 struct _mesa_glsl_parse_state
*state
)
1056 void *mem_ctx
= state
;
1057 ir_rvalue
*result
= from
;
1059 if (to
!= from
->type
->base_type
) {
1060 const glsl_type
*desired_type
=
1061 glsl_type::get_instance(to
,
1062 from
->type
->vector_elements
,
1063 from
->type
->matrix_columns
);
1065 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1066 /* Even though convert_component() implements the constructor
1067 * conversion rules (not the implicit conversion rules), its safe
1068 * to use it here because we already checked that the implicit
1069 * conversion is legal.
1071 result
= convert_component(from
, desired_type
);
1075 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
1077 if (constant
!= NULL
)
1080 if (from
!= result
) {
1081 from
->replace_with(result
);
1085 return constant
!= NULL
;
1090 * Dereference a specific component from a scalar, vector, or matrix
1093 dereference_component(ir_rvalue
*src
, unsigned component
)
1095 void *ctx
= ralloc_parent(src
);
1096 assert(component
< src
->type
->components());
1098 /* If the source is a constant, just create a new constant instead of a
1099 * dereference of the existing constant.
1101 ir_constant
*constant
= src
->as_constant();
1103 return new(ctx
) ir_constant(constant
, component
);
1105 if (src
->type
->is_scalar()) {
1107 } else if (src
->type
->is_vector()) {
1108 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1110 assert(src
->type
->is_matrix());
1112 /* Dereference a row of the matrix, then call this function again to get
1113 * a specific element from that row.
1115 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1116 const int r
= component
% src
->type
->column_type()->vector_elements
;
1117 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1118 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1121 col
->type
= src
->type
->column_type();
1123 return dereference_component(col
, r
);
1126 assert(!"Should not get here.");
1132 process_vec_mat_constructor(exec_list
*instructions
,
1133 const glsl_type
*constructor_type
,
1134 YYLTYPE
*loc
, exec_list
*parameters
,
1135 struct _mesa_glsl_parse_state
*state
)
1139 /* The ARB_shading_language_420pack spec says:
1141 * "If an initializer is a list of initializers enclosed in curly braces,
1142 * the variable being declared must be a vector, a matrix, an array, or a
1145 * int i = { 1 }; // illegal, i is not an aggregate"
1147 if (constructor_type
->vector_elements
<= 1) {
1148 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1149 "matrices, arrays, and structs");
1150 return ir_rvalue::error_value(ctx
);
1153 exec_list actual_parameters
;
1154 const unsigned parameter_count
=
1155 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1157 if (parameter_count
== 0
1158 || (constructor_type
->is_vector() &&
1159 constructor_type
->vector_elements
!= parameter_count
)
1160 || (constructor_type
->is_matrix() &&
1161 constructor_type
->matrix_columns
!= parameter_count
)) {
1162 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1163 constructor_type
->is_vector() ? "vector" : "matrix",
1164 constructor_type
->vector_elements
);
1165 return ir_rvalue::error_value(ctx
);
1168 bool all_parameters_are_constant
= true;
1170 /* Type cast each parameter and, if possible, fold constants. */
1171 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1172 /* Apply implicit conversions (not the scalar constructor rules, see the
1173 * spec quote above!) and attempt to convert the parameter to a constant
1174 * valued expression. After doing so, track whether or not all the
1175 * parameters to the constructor are trivially constant valued
1178 all_parameters_are_constant
&=
1179 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1181 if (constructor_type
->is_matrix()) {
1182 if (ir
->type
!= constructor_type
->column_type()) {
1183 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1184 "expected: %s, found %s",
1185 constructor_type
->column_type()->name
,
1187 return ir_rvalue::error_value(ctx
);
1189 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1190 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1191 "expected: %s, found %s",
1192 constructor_type
->get_scalar_type()->name
,
1194 return ir_rvalue::error_value(ctx
);
1198 if (all_parameters_are_constant
)
1199 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1201 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1203 instructions
->push_tail(var
);
1207 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1208 ir_instruction
*assignment
= NULL
;
1210 if (var
->type
->is_matrix()) {
1212 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1213 assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1215 /* use writemask rather than index for vector */
1216 assert(var
->type
->is_vector());
1218 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1219 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1220 (unsigned)(1 << i
));
1223 instructions
->push_tail(assignment
);
1228 return new(ctx
) ir_dereference_variable(var
);
1233 process_array_constructor(exec_list
*instructions
,
1234 const glsl_type
*constructor_type
,
1235 YYLTYPE
*loc
, exec_list
*parameters
,
1236 struct _mesa_glsl_parse_state
*state
)
1239 /* Array constructors come in two forms: sized and unsized. Sized array
1240 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1241 * variables. In this case the number of parameters must exactly match the
1242 * specified size of the array.
1244 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1245 * are vec4 variables. In this case the size of the array being constructed
1246 * is determined by the number of parameters.
1248 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1250 * "There must be exactly the same number of arguments as the size of
1251 * the array being constructed. If no size is present in the
1252 * constructor, then the array is explicitly sized to the number of
1253 * arguments provided. The arguments are assigned in order, starting at
1254 * element 0, to the elements of the constructed array. Each argument
1255 * must be the same type as the element type of the array, or be a type
1256 * that can be converted to the element type of the array according to
1257 * Section 4.1.10 "Implicit Conversions.""
1259 exec_list actual_parameters
;
1260 const unsigned parameter_count
=
1261 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1262 bool is_unsized_array
= constructor_type
->is_unsized_array();
1264 if ((parameter_count
== 0) ||
1265 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1266 const unsigned min_param
= is_unsized_array
1267 ? 1 : constructor_type
->length
;
1269 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1271 is_unsized_array
? "at least" : "exactly",
1272 min_param
, (min_param
<= 1) ? "" : "s");
1273 return ir_rvalue::error_value(ctx
);
1276 if (is_unsized_array
) {
1278 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1280 assert(constructor_type
!= NULL
);
1281 assert(constructor_type
->length
== parameter_count
);
1284 bool all_parameters_are_constant
= true;
1285 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1287 /* Type cast each parameter and, if possible, fold constants. */
1288 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1289 /* Apply implicit conversions (not the scalar constructor rules, see the
1290 * spec quote above!) and attempt to convert the parameter to a constant
1291 * valued expression. After doing so, track whether or not all the
1292 * parameters to the constructor are trivially constant valued
1295 all_parameters_are_constant
&=
1296 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1298 if (constructor_type
->fields
.array
->is_unsized_array()) {
1299 /* As the inner parameters of the constructor are created without
1300 * knowledge of each other we need to check to make sure unsized
1301 * parameters of unsized constructors all end up with the same size.
1303 * e.g we make sure to fail for a constructor like this:
1304 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1305 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1306 * vec4[](vec4(0.0), vec4(1.0)));
1308 if (element_type
->is_unsized_array()) {
1309 /* This is the first parameter so just get the type */
1310 element_type
= ir
->type
;
1311 } else if (element_type
!= ir
->type
) {
1312 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1313 "expected: %s, found %s",
1316 return ir_rvalue::error_value(ctx
);
1318 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1319 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1320 "expected: %s, found %s",
1321 constructor_type
->fields
.array
->name
,
1323 return ir_rvalue::error_value(ctx
);
1325 element_type
= ir
->type
;
1329 if (constructor_type
->fields
.array
->is_unsized_array()) {
1331 glsl_type::get_array_instance(element_type
,
1333 assert(constructor_type
!= NULL
);
1334 assert(constructor_type
->length
== parameter_count
);
1337 if (all_parameters_are_constant
)
1338 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1340 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1342 instructions
->push_tail(var
);
1345 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1346 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1347 new(ctx
) ir_constant(i
));
1349 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1350 instructions
->push_tail(assignment
);
1355 return new(ctx
) ir_dereference_variable(var
);
1360 * Determine if a list consists of a single scalar r-value
1363 single_scalar_parameter(exec_list
*parameters
)
1365 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1366 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1368 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1373 * Generate inline code for a vector constructor
1375 * The generated constructor code will consist of a temporary variable
1376 * declaration of the same type as the constructor. A sequence of assignments
1377 * from constructor parameters to the temporary will follow.
1380 * An \c ir_dereference_variable of the temprorary generated in the constructor
1384 emit_inline_vector_constructor(const glsl_type
*type
,
1385 exec_list
*instructions
,
1386 exec_list
*parameters
,
1389 assert(!parameters
->is_empty());
1391 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1392 instructions
->push_tail(var
);
1394 /* There are three kinds of vector constructors.
1396 * - Construct a vector from a single scalar by replicating that scalar to
1397 * all components of the vector.
1399 * - Construct a vector from at least a matrix. This case should already
1400 * have been taken care of in ast_function_expression::hir by breaking
1401 * down the matrix into a series of column vectors.
1403 * - Construct a vector from an arbirary combination of vectors and
1404 * scalars. The components of the constructor parameters are assigned
1405 * to the vector in order until the vector is full.
1407 const unsigned lhs_components
= type
->components();
1408 if (single_scalar_parameter(parameters
)) {
1409 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1410 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1412 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1413 const unsigned mask
= (1U << lhs_components
) - 1;
1415 assert(rhs
->type
== lhs
->type
);
1417 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1418 instructions
->push_tail(inst
);
1420 unsigned base_component
= 0;
1421 unsigned base_lhs_component
= 0;
1422 ir_constant_data data
;
1423 unsigned constant_mask
= 0, constant_components
= 0;
1425 memset(&data
, 0, sizeof(data
));
1427 foreach_in_list(ir_rvalue
, param
, parameters
) {
1428 unsigned rhs_components
= param
->type
->components();
1430 /* Do not try to assign more components to the vector than it has! */
1431 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1432 rhs_components
= lhs_components
- base_lhs_component
;
1435 const ir_constant
*const c
= param
->as_constant();
1437 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1438 switch (c
->type
->base_type
) {
1439 case GLSL_TYPE_UINT
:
1440 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1443 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1445 case GLSL_TYPE_FLOAT
:
1446 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1448 case GLSL_TYPE_DOUBLE
:
1449 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1451 case GLSL_TYPE_BOOL
:
1452 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1454 case GLSL_TYPE_UINT64
:
1455 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1457 case GLSL_TYPE_INT64
:
1458 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1461 assert(!"Should not get here.");
1466 /* Mask of fields to be written in the assignment. */
1467 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1468 constant_components
+= rhs_components
;
1470 base_component
+= rhs_components
;
1472 /* Advance the component index by the number of components
1473 * that were just assigned.
1475 base_lhs_component
+= rhs_components
;
1478 if (constant_mask
!= 0) {
1479 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1480 const glsl_type
*rhs_type
=
1481 glsl_type::get_instance(var
->type
->base_type
,
1482 constant_components
,
1484 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1486 ir_instruction
*inst
=
1487 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1488 instructions
->push_tail(inst
);
1492 foreach_in_list(ir_rvalue
, param
, parameters
) {
1493 unsigned rhs_components
= param
->type
->components();
1495 /* Do not try to assign more components to the vector than it has! */
1496 if ((rhs_components
+ base_component
) > lhs_components
) {
1497 rhs_components
= lhs_components
- base_component
;
1500 /* If we do not have any components left to copy, break out of the
1501 * loop. This can happen when initializing a vec4 with a mat3 as the
1502 * mat3 would have been broken into a series of column vectors.
1504 if (rhs_components
== 0) {
1508 const ir_constant
*const c
= param
->as_constant();
1510 /* Mask of fields to be written in the assignment. */
1511 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1514 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1516 /* Generate a swizzle so that LHS and RHS sizes match. */
1518 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1520 ir_instruction
*inst
=
1521 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1522 instructions
->push_tail(inst
);
1525 /* Advance the component index by the number of components that were
1528 base_component
+= rhs_components
;
1531 return new(ctx
) ir_dereference_variable(var
);
1536 * Generate assignment of a portion of a vector to a portion of a matrix column
1538 * \param src_base First component of the source to be used in assignment
1539 * \param column Column of destination to be assiged
1540 * \param row_base First component of the destination column to be assigned
1541 * \param count Number of components to be assigned
1544 * \c src_base + \c count must be less than or equal to the number of
1545 * components in the source vector.
1547 static ir_instruction
*
1548 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1549 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1552 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1553 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1556 assert(column_ref
->type
->components() >= (row_base
+ count
));
1557 assert(src
->type
->components() >= (src_base
+ count
));
1559 /* Generate a swizzle that extracts the number of components from the source
1560 * that are to be assigned to the column of the matrix.
1562 if (count
< src
->type
->vector_elements
) {
1563 src
= new(mem_ctx
) ir_swizzle(src
,
1564 src_base
+ 0, src_base
+ 1,
1565 src_base
+ 2, src_base
+ 3,
1569 /* Mask of fields to be written in the assignment. */
1570 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1572 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1577 * Generate inline code for a matrix constructor
1579 * The generated constructor code will consist of a temporary variable
1580 * declaration of the same type as the constructor. A sequence of assignments
1581 * from constructor parameters to the temporary will follow.
1584 * An \c ir_dereference_variable of the temprorary generated in the constructor
1588 emit_inline_matrix_constructor(const glsl_type
*type
,
1589 exec_list
*instructions
,
1590 exec_list
*parameters
,
1593 assert(!parameters
->is_empty());
1595 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1596 instructions
->push_tail(var
);
1598 /* There are three kinds of matrix constructors.
1600 * - Construct a matrix from a single scalar by replicating that scalar to
1601 * along the diagonal of the matrix and setting all other components to
1604 * - Construct a matrix from an arbirary combination of vectors and
1605 * scalars. The components of the constructor parameters are assigned
1606 * to the matrix in column-major order until the matrix is full.
1608 * - Construct a matrix from a single matrix. The source matrix is copied
1609 * to the upper left portion of the constructed matrix, and the remaining
1610 * elements take values from the identity matrix.
1612 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1613 if (single_scalar_parameter(parameters
)) {
1614 /* Assign the scalar to the X component of a vec4, and fill the remaining
1615 * components with zero.
1617 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1618 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1619 ir_variable
*rhs_var
=
1620 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1623 instructions
->push_tail(rhs_var
);
1625 ir_constant_data zero
;
1626 for (unsigned i
= 0; i
< 4; i
++)
1627 if (first_param
->type
->is_float())
1632 ir_instruction
*inst
=
1633 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1634 new(ctx
) ir_constant(rhs_var
->type
, &zero
));
1635 instructions
->push_tail(inst
);
1637 ir_dereference
*const rhs_ref
=
1638 new(ctx
) ir_dereference_variable(rhs_var
);
1640 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1641 instructions
->push_tail(inst
);
1643 /* Assign the temporary vector to each column of the destination matrix
1644 * with a swizzle that puts the X component on the diagonal of the
1645 * matrix. In some cases this may mean that the X component does not
1646 * get assigned into the column at all (i.e., when the matrix has more
1647 * columns than rows).
1649 static const unsigned rhs_swiz
[4][4] = {
1656 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1657 type
->vector_elements
);
1658 for (unsigned i
= 0; i
< cols_to_init
; 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
, rhs_swiz
[i
],
1665 type
->vector_elements
);
1667 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1668 instructions
->push_tail(inst
);
1671 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1672 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1673 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1676 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1677 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1678 type
->vector_elements
);
1680 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1681 instructions
->push_tail(inst
);
1683 } else if (first_param
->type
->is_matrix()) {
1684 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1686 * "If a matrix is constructed from a matrix, then each component
1687 * (column i, row j) in the result that has a corresponding
1688 * component (column i, row j) in the argument will be initialized
1689 * from there. All other components will be initialized to the
1690 * identity matrix. If a matrix argument is given to a matrix
1691 * constructor, it is an error to have any other arguments."
1693 assert(first_param
->next
->is_tail_sentinel());
1694 ir_rvalue
*const src_matrix
= first_param
;
1696 /* If the source matrix is smaller, pre-initialize the relavent parts of
1697 * the destination matrix to the identity matrix.
1699 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1700 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1702 /* If the source matrix has fewer rows, every column of the
1703 * destination must be initialized. Otherwise only the columns in
1704 * the destination that do not exist in the source must be
1708 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1709 ? 0 : src_matrix
->type
->matrix_columns
;
1711 const glsl_type
*const col_type
= var
->type
->column_type();
1712 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1713 ir_constant_data ident
;
1715 if (!col_type
->is_double()) {
1720 ident
.f
[col
] = 1.0f
;
1729 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1731 ir_rvalue
*const lhs
=
1732 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1734 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
);
1735 instructions
->push_tail(inst
);
1739 /* Assign columns from the source matrix to the destination matrix.
1741 * Since the parameter will be used in the RHS of multiple assignments,
1742 * generate a temporary and copy the paramter there.
1744 ir_variable
*const rhs_var
=
1745 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1747 instructions
->push_tail(rhs_var
);
1749 ir_dereference
*const rhs_var_ref
=
1750 new(ctx
) ir_dereference_variable(rhs_var
);
1751 ir_instruction
*const inst
=
1752 new(ctx
) ir_assignment(rhs_var_ref
, first_param
);
1753 instructions
->push_tail(inst
);
1755 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1756 var
->type
->vector_elements
);
1757 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1758 var
->type
->matrix_columns
);
1760 unsigned swiz
[4] = { 0, 0, 0, 0 };
1761 for (unsigned i
= 1; i
< last_row
; i
++)
1764 const unsigned write_mask
= (1U << last_row
) - 1;
1766 for (unsigned i
= 0; i
< last_col
; i
++) {
1767 ir_dereference
*const lhs
=
1768 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1769 ir_rvalue
*const rhs_col
=
1770 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1772 /* If one matrix has columns that are smaller than the columns of the
1773 * other matrix, wrap the column access of the larger with a swizzle
1774 * so that the LHS and RHS of the assignment have the same size (and
1775 * therefore have the same type).
1777 * It would be perfectly valid to unconditionally generate the
1778 * swizzles, this this will typically result in a more compact IR
1782 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1783 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1788 ir_instruction
*inst
=
1789 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1790 instructions
->push_tail(inst
);
1793 const unsigned cols
= type
->matrix_columns
;
1794 const unsigned rows
= type
->vector_elements
;
1795 unsigned remaining_slots
= rows
* cols
;
1796 unsigned col_idx
= 0;
1797 unsigned row_idx
= 0;
1799 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1800 unsigned rhs_components
= rhs
->type
->components();
1801 unsigned rhs_base
= 0;
1803 if (remaining_slots
== 0)
1806 /* Since the parameter might be used in the RHS of two assignments,
1807 * generate a temporary and copy the paramter there.
1809 ir_variable
*rhs_var
=
1810 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1811 instructions
->push_tail(rhs_var
);
1813 ir_dereference
*rhs_var_ref
=
1814 new(ctx
) ir_dereference_variable(rhs_var
);
1815 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
);
1816 instructions
->push_tail(inst
);
1819 /* Assign the current parameter to as many components of the matrix
1822 * NOTE: A single vector parameter can span two matrix columns. A
1823 * single vec4, for example, can completely fill a mat2.
1825 unsigned count
= MIN2(rows
- row_idx
,
1826 rhs_components
- rhs_base
);
1828 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1829 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1834 instructions
->push_tail(inst
);
1837 remaining_slots
-= count
;
1839 /* Sometimes, there is still data left in the parameters and
1840 * components left to be set in the destination but in other
1843 if (row_idx
>= rows
) {
1847 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1851 return new(ctx
) ir_dereference_variable(var
);
1856 emit_inline_record_constructor(const glsl_type
*type
,
1857 exec_list
*instructions
,
1858 exec_list
*parameters
,
1861 ir_variable
*const var
=
1862 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1863 ir_dereference_variable
*const d
=
1864 new(mem_ctx
) ir_dereference_variable(var
);
1866 instructions
->push_tail(var
);
1868 exec_node
*node
= parameters
->get_head_raw();
1869 for (unsigned i
= 0; i
< type
->length
; i
++) {
1870 assert(!node
->is_tail_sentinel());
1872 ir_dereference
*const lhs
=
1873 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1874 type
->fields
.structure
[i
].name
);
1876 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1877 assert(rhs
!= NULL
);
1879 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
1881 instructions
->push_tail(assign
);
1890 process_record_constructor(exec_list
*instructions
,
1891 const glsl_type
*constructor_type
,
1892 YYLTYPE
*loc
, exec_list
*parameters
,
1893 struct _mesa_glsl_parse_state
*state
)
1896 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1898 * "The arguments to the constructor will be used to set the structure's
1899 * fields, in order, using one argument per field. Each argument must
1900 * be the same type as the field it sets, or be a type that can be
1901 * converted to the field's type according to Section 4.1.10 “Implicit
1904 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1906 * "In all cases, the innermost initializer (i.e., not a list of
1907 * initializers enclosed in curly braces) applied to an object must
1908 * have the same type as the object being initialized or be a type that
1909 * can be converted to the object's type according to section 4.1.10
1910 * "Implicit Conversions". In the latter case, an implicit conversion
1911 * will be done on the initializer before the assignment is done."
1913 exec_list actual_parameters
;
1915 const unsigned parameter_count
=
1916 process_parameters(instructions
, &actual_parameters
, parameters
,
1919 if (parameter_count
!= constructor_type
->length
) {
1920 _mesa_glsl_error(loc
, state
,
1921 "%s parameters in constructor for `%s'",
1922 parameter_count
> constructor_type
->length
1923 ? "too many": "insufficient",
1924 constructor_type
->name
);
1925 return ir_rvalue::error_value(ctx
);
1928 bool all_parameters_are_constant
= true;
1931 /* Type cast each parameter and, if possible, fold constants. */
1932 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1934 const glsl_struct_field
*struct_field
=
1935 &constructor_type
->fields
.structure
[i
];
1937 /* Apply implicit conversions (not the scalar constructor rules, see the
1938 * spec quote above!) and attempt to convert the parameter to a constant
1939 * valued expression. After doing so, track whether or not all the
1940 * parameters to the constructor are trivially constant valued
1943 all_parameters_are_constant
&=
1944 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1947 if (ir
->type
!= struct_field
->type
) {
1948 _mesa_glsl_error(loc
, state
,
1949 "parameter type mismatch in constructor for `%s.%s' "
1951 constructor_type
->name
,
1954 struct_field
->type
->name
);
1955 return ir_rvalue::error_value(ctx
);
1961 if (all_parameters_are_constant
) {
1962 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1964 return emit_inline_record_constructor(constructor_type
, instructions
,
1965 &actual_parameters
, state
);
1970 ast_function_expression::handle_method(exec_list
*instructions
,
1971 struct _mesa_glsl_parse_state
*state
)
1973 const ast_expression
*field
= subexpressions
[0];
1977 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1978 YYLTYPE loc
= get_location();
1979 state
->check_version(120, 300, &loc
, "methods not supported");
1982 method
= field
->primary_expression
.identifier
;
1984 /* This would prevent to raise "uninitialized variable" warnings when
1985 * calling array.length.
1987 field
->subexpressions
[0]->set_is_lhs(true);
1988 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1989 if (strcmp(method
, "length") == 0) {
1990 if (!this->expressions
.is_empty()) {
1991 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1995 if (op
->type
->is_array()) {
1996 if (op
->type
->is_unsized_array()) {
1997 if (!state
->has_shader_storage_buffer_objects()) {
1998 _mesa_glsl_error(&loc
, state
,
1999 "length called on unsized array"
2000 " only available with"
2001 " ARB_shader_storage_buffer_object");
2003 /* Calculate length of an unsized array in run-time */
2004 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
2007 result
= new(ctx
) ir_constant(op
->type
->array_size());
2009 } else if (op
->type
->is_vector()) {
2010 if (state
->has_420pack()) {
2011 /* .length() returns int. */
2012 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
2014 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2015 " available with ARB_shading_language_420pack");
2018 } else if (op
->type
->is_matrix()) {
2019 if (state
->has_420pack()) {
2020 /* .length() returns int. */
2021 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
2023 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
2024 " available with ARB_shading_language_420pack");
2028 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
2032 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
2037 return ir_rvalue::error_value(ctx
);
2040 static inline bool is_valid_constructor(const glsl_type
*type
,
2041 struct _mesa_glsl_parse_state
*state
)
2043 return type
->is_numeric() || type
->is_boolean() ||
2044 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
2048 ast_function_expression::hir(exec_list
*instructions
,
2049 struct _mesa_glsl_parse_state
*state
)
2052 /* There are three sorts of function calls.
2054 * 1. constructors - The first subexpression is an ast_type_specifier.
2055 * 2. methods - Only the .length() method of array types.
2056 * 3. functions - Calls to regular old functions.
2059 if (is_constructor()) {
2060 const ast_type_specifier
*type
=
2061 (ast_type_specifier
*) subexpressions
[0];
2062 YYLTYPE loc
= type
->get_location();
2065 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
2067 /* constructor_type can be NULL if a variable with the same name as the
2068 * structure has come into scope.
2070 if (constructor_type
== NULL
) {
2071 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
2072 "may be shadowed by a variable with the same name)",
2074 return ir_rvalue::error_value(ctx
);
2078 /* Constructors for opaque types are illegal.
2080 * From section 4.1.7 of the ARB_bindless_texture spec:
2082 * "Samplers are represented using 64-bit integer handles, and may be "
2083 * converted to and from 64-bit integers using constructors."
2085 * From section 4.1.X of the ARB_bindless_texture spec:
2087 * "Images are represented using 64-bit integer handles, and may be
2088 * converted to and from 64-bit integers using constructors."
2090 if (constructor_type
->contains_atomic() ||
2091 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2092 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2093 state
->has_bindless() ? "atomic" : "opaque",
2094 constructor_type
->name
);
2095 return ir_rvalue::error_value(ctx
);
2098 if (constructor_type
->is_subroutine()) {
2099 _mesa_glsl_error(& loc
, state
,
2100 "subroutine name cannot be a constructor `%s'",
2101 constructor_type
->name
);
2102 return ir_rvalue::error_value(ctx
);
2105 if (constructor_type
->is_array()) {
2106 if (!state
->check_version(120, 300, &loc
,
2107 "array constructors forbidden")) {
2108 return ir_rvalue::error_value(ctx
);
2111 return process_array_constructor(instructions
, constructor_type
,
2112 & loc
, &this->expressions
, state
);
2116 /* There are two kinds of constructor calls. Constructors for arrays and
2117 * structures must have the exact number of arguments with matching types
2118 * in the correct order. These constructors follow essentially the same
2119 * type matching rules as functions.
2121 * Constructors for built-in language types, such as mat4 and vec2, are
2122 * free form. The only requirements are that the parameters must provide
2123 * enough values of the correct scalar type and that no arguments are
2124 * given past the last used argument.
2126 * When using the C-style initializer syntax from GLSL 4.20, constructors
2127 * must have the exact number of arguments with matching types in the
2130 if (constructor_type
->is_struct()) {
2131 return process_record_constructor(instructions
, constructor_type
,
2132 &loc
, &this->expressions
,
2136 if (!is_valid_constructor(constructor_type
, state
))
2137 return ir_rvalue::error_value(ctx
);
2139 /* Total number of components of the type being constructed. */
2140 const unsigned type_components
= constructor_type
->components();
2142 /* Number of components from parameters that have actually been
2143 * consumed. This is used to perform several kinds of error checking.
2145 unsigned components_used
= 0;
2147 unsigned matrix_parameters
= 0;
2148 unsigned nonmatrix_parameters
= 0;
2149 exec_list actual_parameters
;
2151 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2152 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2154 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2156 * "It is an error to provide extra arguments beyond this
2157 * last used argument."
2159 if (components_used
>= type_components
) {
2160 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2162 constructor_type
->name
);
2163 return ir_rvalue::error_value(ctx
);
2166 if (!is_valid_constructor(result
->type
, state
)) {
2167 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2168 "non-numeric data type",
2169 constructor_type
->name
);
2170 return ir_rvalue::error_value(ctx
);
2173 /* Count the number of matrix and nonmatrix parameters. This
2174 * is used below to enforce some of the constructor rules.
2176 if (result
->type
->is_matrix())
2177 matrix_parameters
++;
2179 nonmatrix_parameters
++;
2181 actual_parameters
.push_tail(result
);
2182 components_used
+= result
->type
->components();
2185 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2187 * "It is an error to construct matrices from other matrices. This
2188 * is reserved for future use."
2190 if (matrix_parameters
> 0
2191 && constructor_type
->is_matrix()
2192 && !state
->check_version(120, 100, &loc
,
2193 "cannot construct `%s' from a matrix",
2194 constructor_type
->name
)) {
2195 return ir_rvalue::error_value(ctx
);
2198 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2200 * "If a matrix argument is given to a matrix constructor, it is
2201 * an error to have any other arguments."
2203 if ((matrix_parameters
> 0)
2204 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2205 && constructor_type
->is_matrix()) {
2206 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2207 "matrix must be only parameter",
2208 constructor_type
->name
);
2209 return ir_rvalue::error_value(ctx
);
2212 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2214 * "In these cases, there must be enough components provided in the
2215 * arguments to provide an initializer for every component in the
2216 * constructed value."
2218 if (components_used
< type_components
&& components_used
!= 1
2219 && matrix_parameters
== 0) {
2220 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2222 constructor_type
->name
);
2223 return ir_rvalue::error_value(ctx
);
2226 /* Matrices can never be consumed as is by any constructor but matrix
2227 * constructors. If the constructor type is not matrix, always break the
2228 * matrix up into a series of column vectors.
2230 if (!constructor_type
->is_matrix()) {
2231 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2232 if (!matrix
->type
->is_matrix())
2235 /* Create a temporary containing the matrix. */
2236 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2238 instructions
->push_tail(var
);
2239 instructions
->push_tail(
2240 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2242 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2244 /* Replace the matrix with dereferences of its columns. */
2245 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2246 matrix
->insert_before(
2247 new (ctx
) ir_dereference_array(var
,
2248 new(ctx
) ir_constant(i
)));
2254 bool all_parameters_are_constant
= true;
2256 /* Type cast each parameter and, if possible, fold constants.*/
2257 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2258 const glsl_type
*desired_type
;
2260 /* From section 5.4.1 of the ARB_bindless_texture spec:
2262 * "In the following four constructors, the low 32 bits of the sampler
2263 * type correspond to the .x component of the uvec2 and the high 32
2264 * bits correspond to the .y component."
2266 * uvec2(any sampler type) // Converts a sampler type to a
2267 * // pair of 32-bit unsigned integers
2268 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2270 * uvec2(any image type) // Converts an image type to a
2271 * // pair of 32-bit unsigned integers
2272 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2275 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2276 /* Convert a sampler/image type to a pair of 32-bit unsigned
2277 * integers as defined by ARB_bindless_texture.
2279 if (constructor_type
!= glsl_type::uvec2_type
) {
2280 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2281 "be converted to a pair of 32-bit unsigned "
2284 desired_type
= glsl_type::uvec2_type
;
2285 } else if (constructor_type
->is_sampler() ||
2286 constructor_type
->is_image()) {
2287 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2288 * type as defined by ARB_bindless_texture.
2290 if (ir
->type
!= glsl_type::uvec2_type
) {
2291 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2292 "be converted from a pair of 32-bit unsigned "
2295 desired_type
= constructor_type
;
2298 glsl_type::get_instance(constructor_type
->base_type
,
2299 ir
->type
->vector_elements
,
2300 ir
->type
->matrix_columns
);
2303 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2305 /* Attempt to convert the parameter to a constant valued expression.
2306 * After doing so, track whether or not all the parameters to the
2307 * constructor are trivially constant valued expressions.
2309 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2311 if (constant
!= NULL
)
2314 all_parameters_are_constant
= false;
2317 ir
->replace_with(result
);
2321 /* If all of the parameters are trivially constant, create a
2322 * constant representing the complete collection of parameters.
2324 if (all_parameters_are_constant
) {
2325 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2326 } else if (constructor_type
->is_scalar()) {
2327 return dereference_component((ir_rvalue
*)
2328 actual_parameters
.get_head_raw(),
2330 } else if (constructor_type
->is_vector()) {
2331 return emit_inline_vector_constructor(constructor_type
,
2336 assert(constructor_type
->is_matrix());
2337 return emit_inline_matrix_constructor(constructor_type
,
2342 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2343 return handle_method(instructions
, state
);
2345 const ast_expression
*id
= subexpressions
[0];
2346 const char *func_name
= NULL
;
2347 YYLTYPE loc
= get_location();
2348 exec_list actual_parameters
;
2349 ir_variable
*sub_var
= NULL
;
2350 ir_rvalue
*array_idx
= NULL
;
2352 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2355 if (id
->oper
== ast_array_index
) {
2356 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2357 id
->subexpressions
[0],
2358 id
->subexpressions
[1], &func_name
,
2359 &actual_parameters
);
2360 } else if (id
->oper
== ast_identifier
) {
2361 func_name
= id
->primary_expression
.identifier
;
2363 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2366 /* an error was emitted earlier */
2368 return ir_rvalue::error_value(ctx
);
2370 ir_function_signature
*sig
=
2371 match_function_by_name(func_name
, &actual_parameters
, state
);
2373 ir_rvalue
*value
= NULL
;
2375 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2380 no_matching_function_error(func_name
, &loc
,
2381 &actual_parameters
, state
);
2382 value
= ir_rvalue::error_value(ctx
);
2383 } else if (!verify_parameter_modes(state
, sig
,
2385 this->expressions
)) {
2386 /* an error has already been emitted */
2387 value
= ir_rvalue::error_value(ctx
);
2388 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2389 /* ftransform refers to global variables, and we don't have any code
2390 * for remapping the variable references in the built-in shader.
2393 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2394 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2395 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2396 new(ctx
) ir_dereference_variable(mvp
),
2397 new(ctx
) ir_dereference_variable(vtx
));
2399 bool is_begin_interlock
= false;
2400 bool is_end_interlock
= false;
2401 if (sig
->is_builtin() &&
2402 state
->stage
== MESA_SHADER_FRAGMENT
&&
2403 state
->ARB_fragment_shader_interlock_enable
) {
2404 is_begin_interlock
= strcmp(func_name
, "beginInvocationInterlockARB") == 0;
2405 is_end_interlock
= strcmp(func_name
, "endInvocationInterlockARB") == 0;
2408 if (sig
->is_builtin() &&
2409 ((state
->stage
== MESA_SHADER_TESS_CTRL
&&
2410 strcmp(func_name
, "barrier") == 0) ||
2411 is_begin_interlock
|| is_end_interlock
)) {
2412 if (state
->current_function
== NULL
||
2413 strcmp(state
->current_function
->function_name(), "main") != 0) {
2414 _mesa_glsl_error(&loc
, state
,
2415 "%s() may only be used in main()", func_name
);
2418 if (state
->found_return
) {
2419 _mesa_glsl_error(&loc
, state
,
2420 "%s() may not be used after return", func_name
);
2423 if (instructions
!= &state
->current_function
->body
) {
2424 _mesa_glsl_error(&loc
, state
,
2425 "%s() may not be used in control flow", func_name
);
2429 /* There can be only one begin/end interlock pair in the function. */
2430 if (is_begin_interlock
) {
2431 if (state
->found_begin_interlock
)
2432 _mesa_glsl_error(&loc
, state
,
2433 "beginInvocationInterlockARB may not be used twice");
2434 state
->found_begin_interlock
= true;
2435 } else if (is_end_interlock
) {
2436 if (!state
->found_begin_interlock
)
2437 _mesa_glsl_error(&loc
, state
,
2438 "endInvocationInterlockARB may not be used "
2439 "before beginInvocationInterlockARB");
2440 if (state
->found_end_interlock
)
2441 _mesa_glsl_error(&loc
, state
,
2442 "endInvocationInterlockARB may not be used twice");
2443 state
->found_end_interlock
= true;
2446 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2449 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2452 instructions
->push_tail(tmp
);
2453 value
= new(ctx
) ir_dereference_variable(tmp
);
2460 unreachable("not reached");
2464 ast_function_expression::has_sequence_subexpression() const
2466 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2467 if (ast
->has_sequence_subexpression())
2475 ast_aggregate_initializer::hir(exec_list
*instructions
,
2476 struct _mesa_glsl_parse_state
*state
)
2479 YYLTYPE loc
= this->get_location();
2481 if (!this->constructor_type
) {
2482 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2483 return ir_rvalue::error_value(ctx
);
2485 const glsl_type
*const constructor_type
= this->constructor_type
;
2487 if (!state
->has_420pack()) {
2488 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2489 "GL_ARB_shading_language_420pack extension");
2490 return ir_rvalue::error_value(ctx
);
2493 if (constructor_type
->is_array()) {
2494 return process_array_constructor(instructions
, constructor_type
, &loc
,
2495 &this->expressions
, state
);
2498 if (constructor_type
->is_struct()) {
2499 return process_record_constructor(instructions
, constructor_type
, &loc
,
2500 &this->expressions
, state
);
2503 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2504 &this->expressions
, state
);