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())) {
352 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
353 exec_list
*before_instructions
, exec_list
*after_instructions
,
354 bool parameter_is_inout
)
356 ir_expression
*const expr
= actual
->as_expression();
358 /* If the types match exactly and the parameter is not a vector-extract,
359 * nothing needs to be done to fix the parameter.
361 if (formal_type
== actual
->type
362 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
365 /* To convert an out parameter, we need to create a temporary variable to
366 * hold the value before conversion, and then perform the conversion after
367 * the function call returns.
369 * This has the effect of transforming code like this:
375 * Into IR that's equivalent to this:
379 * int out_parameter_conversion;
380 * f(out_parameter_conversion);
381 * value = float(out_parameter_conversion);
383 * If the parameter is an ir_expression of ir_binop_vector_extract,
384 * additional conversion is needed in the post-call re-write.
387 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
389 before_instructions
->push_tail(tmp
);
391 /* If the parameter is an inout parameter, copy the value of the actual
392 * parameter to the new temporary. Note that no type conversion is allowed
393 * here because inout parameters must match types exactly.
395 if (parameter_is_inout
) {
396 /* Inout parameters should never require conversion, since that would
397 * require an implicit conversion to exist both to and from the formal
398 * parameter type, and there are no bidirectional implicit conversions.
400 assert (actual
->type
== formal_type
);
402 ir_dereference_variable
*const deref_tmp_1
=
403 new(mem_ctx
) ir_dereference_variable(tmp
);
404 ir_assignment
*const assignment
=
405 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
406 before_instructions
->push_tail(assignment
);
409 /* Replace the parameter in the call with a dereference of the new
412 ir_dereference_variable
*const deref_tmp_2
=
413 new(mem_ctx
) ir_dereference_variable(tmp
);
414 actual
->replace_with(deref_tmp_2
);
417 /* Copy the temporary variable to the actual parameter with optional
418 * type conversion applied.
420 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
421 if (actual
->type
!= formal_type
)
422 rhs
= convert_component(rhs
, actual
->type
);
424 ir_rvalue
*lhs
= actual
;
425 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
426 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
428 expr
->operands
[1]->clone(mem_ctx
,
432 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
433 after_instructions
->push_tail(assignment_2
);
437 * Generate a function call.
439 * For non-void functions, this returns a dereference of the temporary
440 * variable which stores the return value for the call. For void functions,
444 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
445 exec_list
*actual_parameters
,
446 ir_variable
*sub_var
,
447 ir_rvalue
*array_idx
,
448 struct _mesa_glsl_parse_state
*state
)
451 exec_list post_call_conversions
;
453 /* Perform implicit conversion of arguments. For out parameters, we need
454 * to place them in a temporary variable and do the conversion after the
455 * call takes place. Since we haven't emitted the call yet, we'll place
456 * the post-call conversions in a temporary exec_list, and emit them later.
458 foreach_two_lists(formal_node
, &sig
->parameters
,
459 actual_node
, actual_parameters
) {
460 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
461 ir_variable
*formal
= (ir_variable
*) formal_node
;
463 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
464 switch (formal
->data
.mode
) {
465 case ir_var_const_in
:
466 case ir_var_function_in
: {
468 = convert_component(actual
, formal
->type
);
469 actual
->replace_with(converted
);
472 case ir_var_function_out
:
473 case ir_var_function_inout
:
474 fix_parameter(ctx
, actual
, formal
->type
,
475 instructions
, &post_call_conversions
,
476 formal
->data
.mode
== ir_var_function_inout
);
479 assert (!"Illegal formal parameter mode");
485 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
487 * "Initializers for const declarations must be formed from literal
488 * values, other const variables (not including function call
489 * paramaters), or expressions of these.
491 * Constructors may be used in such expressions, but function calls may
494 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
496 * "A constant expression is one of
500 * - a built-in function call whose arguments are all constant
501 * expressions, with the exception of the texture lookup
502 * functions, the noise functions, and ftransform. The built-in
503 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
504 * inside an initializer with an argument that is a constant
507 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
509 * "A constant expression is one of
513 * - a built-in function call whose arguments are all constant
514 * expressions, with the exception of the texture lookup
517 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
519 * "A constant expression is one of
523 * - a built-in function call whose arguments are all constant
524 * expressions, with the exception of the texture lookup
525 * functions. The built-in functions dFdx, dFdy, and fwidth must
526 * return 0 when evaluated inside an initializer with an argument
527 * that is a constant expression."
529 * If the function call is a constant expression, don't generate any
530 * instructions; just generate an ir_constant.
532 if (state
->is_version(120, 100) ||
533 state
->ctx
->Const
.AllowGLSLBuiltinConstantExpression
) {
534 ir_constant
*value
= sig
->constant_expression_value(ctx
,
542 ir_dereference_variable
*deref
= NULL
;
543 if (!sig
->return_type
->is_void()) {
544 /* Create a new temporary to hold the return value. */
545 char *const name
= ir_variable::temporaries_allocate_names
546 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
551 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
552 instructions
->push_tail(var
);
556 deref
= new(ctx
) ir_dereference_variable(var
);
559 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
560 actual_parameters
, sub_var
, array_idx
);
561 instructions
->push_tail(call
);
562 if (sig
->is_builtin()) {
563 /* inline immediately */
564 call
->generate_inline(call
);
568 /* Also emit any necessary out-parameter conversions. */
569 instructions
->append_list(&post_call_conversions
);
571 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
575 * Given a function name and parameter list, find the matching signature.
577 static ir_function_signature
*
578 match_function_by_name(const char *name
,
579 exec_list
*actual_parameters
,
580 struct _mesa_glsl_parse_state
*state
)
582 ir_function
*f
= state
->symbols
->get_function(name
);
583 ir_function_signature
*local_sig
= NULL
;
584 ir_function_signature
*sig
= NULL
;
586 /* Is the function hidden by a record type constructor? */
587 if (state
->symbols
->get_type(name
))
588 return sig
; /* no match */
590 /* Is the function hidden by a variable (impossible in 1.10)? */
591 if (!state
->symbols
->separate_function_namespace
592 && state
->symbols
->get_variable(name
))
593 return sig
; /* no match */
596 /* In desktop GL, the presence of a user-defined signature hides any
597 * built-in signatures, so we must ignore them. In contrast, in ES2
598 * user-defined signatures add new overloads, so we must consider them.
600 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
602 /* Look for a match in the local shader. If exact, we're done. */
603 bool is_exact
= false;
604 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
605 allow_builtins
, &is_exact
);
613 /* Local shader has no exact candidates; check the built-ins. */
614 _mesa_glsl_initialize_builtin_functions();
615 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
619 static ir_function_signature
*
620 match_subroutine_by_name(const char *name
,
621 exec_list
*actual_parameters
,
622 struct _mesa_glsl_parse_state
*state
,
626 ir_function_signature
*sig
= NULL
;
627 ir_function
*f
, *found
= NULL
;
628 const char *new_name
;
630 bool is_exact
= false;
633 ralloc_asprintf(ctx
, "%s_%s",
634 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
636 var
= state
->symbols
->get_variable(new_name
);
640 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
641 f
= state
->subroutine_types
[i
];
642 if (strcmp(f
->name
, var
->type
->without_array()->name
))
651 sig
= found
->matching_signature(state
, actual_parameters
,
657 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
658 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
659 const ast_expression
*array
, ast_expression
*idx
,
660 const char **function_name
, exec_list
*actual_parameters
)
662 if (array
->oper
== ast_array_index
) {
663 /* This handles arrays of arrays */
664 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
666 array
->subexpressions
[0],
667 array
->subexpressions
[1],
670 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
672 YYLTYPE index_loc
= idx
->get_location();
673 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
674 outer_array_idx
, loc
,
677 ir_variable
*sub_var
= NULL
;
678 *function_name
= array
->primary_expression
.identifier
;
680 if (!match_subroutine_by_name(*function_name
, actual_parameters
,
682 _mesa_glsl_error(&loc
, state
, "Unknown subroutine `%s'",
684 *function_name
= NULL
; /* indicate error condition to caller */
688 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
689 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
694 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
700 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
701 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
704 char *str
= prototype_string(sig
->return_type
, f
->name
,
706 _mesa_glsl_error(loc
, state
, " %s", str
);
712 * Raise a "no matching function" error, listing all possible overloads the
713 * compiler considered so developers can figure out what went wrong.
716 no_matching_function_error(const char *name
,
718 exec_list
*actual_parameters
,
719 _mesa_glsl_parse_state
*state
)
721 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
723 if (state
->symbols
->get_function(name
) == NULL
724 && (!state
->uses_builtin_functions
725 || sh
->symbols
->get_function(name
) == NULL
)) {
726 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
728 char *str
= prototype_string(NULL
, name
, actual_parameters
);
729 _mesa_glsl_error(loc
, state
,
730 "no matching function for call to `%s';"
735 print_function_prototypes(state
, loc
,
736 state
->symbols
->get_function(name
));
738 if (state
->uses_builtin_functions
) {
739 print_function_prototypes(state
, loc
,
740 sh
->symbols
->get_function(name
));
746 * Perform automatic type conversion of constructor parameters
748 * This implements the rules in the "Conversion and Scalar Constructors"
749 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
752 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
754 void *ctx
= ralloc_parent(src
);
755 const unsigned a
= desired_type
->base_type
;
756 const unsigned b
= src
->type
->base_type
;
757 ir_expression
*result
= NULL
;
759 if (src
->type
->is_error())
762 assert(a
<= GLSL_TYPE_IMAGE
);
763 assert(b
<= GLSL_TYPE_IMAGE
);
772 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
774 case GLSL_TYPE_FLOAT
:
775 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
778 result
= new(ctx
) ir_expression(ir_unop_i2u
,
779 new(ctx
) ir_expression(ir_unop_b2i
,
782 case GLSL_TYPE_DOUBLE
:
783 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
785 case GLSL_TYPE_UINT64
:
786 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
788 case GLSL_TYPE_INT64
:
789 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
791 case GLSL_TYPE_SAMPLER
:
792 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
794 case GLSL_TYPE_IMAGE
:
795 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
802 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
804 case GLSL_TYPE_FLOAT
:
805 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
808 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
810 case GLSL_TYPE_DOUBLE
:
811 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
813 case GLSL_TYPE_UINT64
:
814 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
816 case GLSL_TYPE_INT64
:
817 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
821 case GLSL_TYPE_FLOAT
:
824 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
827 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
830 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
832 case GLSL_TYPE_DOUBLE
:
833 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
835 case GLSL_TYPE_UINT64
:
836 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
838 case GLSL_TYPE_INT64
:
839 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
846 result
= new(ctx
) ir_expression(ir_unop_i2b
,
847 new(ctx
) ir_expression(ir_unop_u2i
,
851 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
853 case GLSL_TYPE_FLOAT
:
854 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
856 case GLSL_TYPE_DOUBLE
:
857 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
859 case GLSL_TYPE_UINT64
:
860 result
= new(ctx
) ir_expression(ir_unop_i642b
,
861 new(ctx
) ir_expression(ir_unop_u642i64
,
864 case GLSL_TYPE_INT64
:
865 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
869 case GLSL_TYPE_DOUBLE
:
872 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
875 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
878 result
= new(ctx
) ir_expression(ir_unop_f2d
,
879 new(ctx
) ir_expression(ir_unop_b2f
,
882 case GLSL_TYPE_FLOAT
:
883 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
885 case GLSL_TYPE_UINT64
:
886 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
888 case GLSL_TYPE_INT64
:
889 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
893 case GLSL_TYPE_UINT64
:
896 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
899 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
902 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
903 new(ctx
) ir_expression(ir_unop_b2i64
,
906 case GLSL_TYPE_FLOAT
:
907 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
909 case GLSL_TYPE_DOUBLE
:
910 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
912 case GLSL_TYPE_INT64
:
913 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
917 case GLSL_TYPE_INT64
:
920 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
923 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
926 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
928 case GLSL_TYPE_FLOAT
:
929 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
931 case GLSL_TYPE_DOUBLE
:
932 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
934 case GLSL_TYPE_UINT64
:
935 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
939 case GLSL_TYPE_SAMPLER
:
943 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
947 case GLSL_TYPE_IMAGE
:
951 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
957 assert(result
!= NULL
);
958 assert(result
->type
== desired_type
);
960 /* Try constant folding; it may fold in the conversion we just added. */
961 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
962 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
967 * Perform automatic type and constant conversion of constructor parameters
969 * This implements the rules in the "Implicit Conversions" rules, not the
970 * "Conversion and Scalar Constructors".
972 * After attempting the implicit conversion, an attempt to convert into a
973 * constant valued expression is also done.
975 * The \c from \c ir_rvalue is converted "in place".
977 * \param from Operand that is being converted
978 * \param to Base type the operand will be converted to
979 * \param state GLSL compiler state
982 * If the attempt to convert into a constant expression succeeds, \c true is
983 * returned. Otherwise \c false is returned.
986 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
987 struct _mesa_glsl_parse_state
*state
)
989 void *mem_ctx
= state
;
990 ir_rvalue
*result
= from
;
992 if (to
!= from
->type
->base_type
) {
993 const glsl_type
*desired_type
=
994 glsl_type::get_instance(to
,
995 from
->type
->vector_elements
,
996 from
->type
->matrix_columns
);
998 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
999 /* Even though convert_component() implements the constructor
1000 * conversion rules (not the implicit conversion rules), its safe
1001 * to use it here because we already checked that the implicit
1002 * conversion is legal.
1004 result
= convert_component(from
, desired_type
);
1008 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
1010 if (constant
!= NULL
)
1013 if (from
!= result
) {
1014 from
->replace_with(result
);
1018 return constant
!= NULL
;
1023 * Dereference a specific component from a scalar, vector, or matrix
1026 dereference_component(ir_rvalue
*src
, unsigned component
)
1028 void *ctx
= ralloc_parent(src
);
1029 assert(component
< src
->type
->components());
1031 /* If the source is a constant, just create a new constant instead of a
1032 * dereference of the existing constant.
1034 ir_constant
*constant
= src
->as_constant();
1036 return new(ctx
) ir_constant(constant
, component
);
1038 if (src
->type
->is_scalar()) {
1040 } else if (src
->type
->is_vector()) {
1041 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1043 assert(src
->type
->is_matrix());
1045 /* Dereference a row of the matrix, then call this function again to get
1046 * a specific element from that row.
1048 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1049 const int r
= component
% src
->type
->column_type()->vector_elements
;
1050 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1051 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1054 col
->type
= src
->type
->column_type();
1056 return dereference_component(col
, r
);
1059 assert(!"Should not get here.");
1065 process_vec_mat_constructor(exec_list
*instructions
,
1066 const glsl_type
*constructor_type
,
1067 YYLTYPE
*loc
, exec_list
*parameters
,
1068 struct _mesa_glsl_parse_state
*state
)
1072 /* The ARB_shading_language_420pack spec says:
1074 * "If an initializer is a list of initializers enclosed in curly braces,
1075 * the variable being declared must be a vector, a matrix, an array, or a
1078 * int i = { 1 }; // illegal, i is not an aggregate"
1080 if (constructor_type
->vector_elements
<= 1) {
1081 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1082 "matrices, arrays, and structs");
1083 return ir_rvalue::error_value(ctx
);
1086 exec_list actual_parameters
;
1087 const unsigned parameter_count
=
1088 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1090 if (parameter_count
== 0
1091 || (constructor_type
->is_vector() &&
1092 constructor_type
->vector_elements
!= parameter_count
)
1093 || (constructor_type
->is_matrix() &&
1094 constructor_type
->matrix_columns
!= parameter_count
)) {
1095 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1096 constructor_type
->is_vector() ? "vector" : "matrix",
1097 constructor_type
->vector_elements
);
1098 return ir_rvalue::error_value(ctx
);
1101 bool all_parameters_are_constant
= true;
1103 /* Type cast each parameter and, if possible, fold constants. */
1104 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1105 /* Apply implicit conversions (not the scalar constructor rules, see the
1106 * spec quote above!) and attempt to convert the parameter to a constant
1107 * valued expression. After doing so, track whether or not all the
1108 * parameters to the constructor are trivially constant valued
1111 all_parameters_are_constant
&=
1112 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1114 if (constructor_type
->is_matrix()) {
1115 if (ir
->type
!= constructor_type
->column_type()) {
1116 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1117 "expected: %s, found %s",
1118 constructor_type
->column_type()->name
,
1120 return ir_rvalue::error_value(ctx
);
1122 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1123 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1124 "expected: %s, found %s",
1125 constructor_type
->get_scalar_type()->name
,
1127 return ir_rvalue::error_value(ctx
);
1131 if (all_parameters_are_constant
)
1132 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1134 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1136 instructions
->push_tail(var
);
1140 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1141 ir_instruction
*assignment
= NULL
;
1143 if (var
->type
->is_matrix()) {
1145 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1146 assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1148 /* use writemask rather than index for vector */
1149 assert(var
->type
->is_vector());
1151 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1152 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1153 (unsigned)(1 << i
));
1156 instructions
->push_tail(assignment
);
1161 return new(ctx
) ir_dereference_variable(var
);
1166 process_array_constructor(exec_list
*instructions
,
1167 const glsl_type
*constructor_type
,
1168 YYLTYPE
*loc
, exec_list
*parameters
,
1169 struct _mesa_glsl_parse_state
*state
)
1172 /* Array constructors come in two forms: sized and unsized. Sized array
1173 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1174 * variables. In this case the number of parameters must exactly match the
1175 * specified size of the array.
1177 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1178 * are vec4 variables. In this case the size of the array being constructed
1179 * is determined by the number of parameters.
1181 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1183 * "There must be exactly the same number of arguments as the size of
1184 * the array being constructed. If no size is present in the
1185 * constructor, then the array is explicitly sized to the number of
1186 * arguments provided. The arguments are assigned in order, starting at
1187 * element 0, to the elements of the constructed array. Each argument
1188 * must be the same type as the element type of the array, or be a type
1189 * that can be converted to the element type of the array according to
1190 * Section 4.1.10 "Implicit Conversions.""
1192 exec_list actual_parameters
;
1193 const unsigned parameter_count
=
1194 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1195 bool is_unsized_array
= constructor_type
->is_unsized_array();
1197 if ((parameter_count
== 0) ||
1198 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1199 const unsigned min_param
= is_unsized_array
1200 ? 1 : constructor_type
->length
;
1202 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1204 is_unsized_array
? "at least" : "exactly",
1205 min_param
, (min_param
<= 1) ? "" : "s");
1206 return ir_rvalue::error_value(ctx
);
1209 if (is_unsized_array
) {
1211 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1213 assert(constructor_type
!= NULL
);
1214 assert(constructor_type
->length
== parameter_count
);
1217 bool all_parameters_are_constant
= true;
1218 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1220 /* Type cast each parameter and, if possible, fold constants. */
1221 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1222 /* Apply implicit conversions (not the scalar constructor rules, see the
1223 * spec quote above!) and attempt to convert the parameter to a constant
1224 * valued expression. After doing so, track whether or not all the
1225 * parameters to the constructor are trivially constant valued
1228 all_parameters_are_constant
&=
1229 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1231 if (constructor_type
->fields
.array
->is_unsized_array()) {
1232 /* As the inner parameters of the constructor are created without
1233 * knowledge of each other we need to check to make sure unsized
1234 * parameters of unsized constructors all end up with the same size.
1236 * e.g we make sure to fail for a constructor like this:
1237 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1238 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1239 * vec4[](vec4(0.0), vec4(1.0)));
1241 if (element_type
->is_unsized_array()) {
1242 /* This is the first parameter so just get the type */
1243 element_type
= ir
->type
;
1244 } else if (element_type
!= ir
->type
) {
1245 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1246 "expected: %s, found %s",
1249 return ir_rvalue::error_value(ctx
);
1251 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1252 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1253 "expected: %s, found %s",
1254 constructor_type
->fields
.array
->name
,
1256 return ir_rvalue::error_value(ctx
);
1258 element_type
= ir
->type
;
1262 if (constructor_type
->fields
.array
->is_unsized_array()) {
1264 glsl_type::get_array_instance(element_type
,
1266 assert(constructor_type
!= NULL
);
1267 assert(constructor_type
->length
== parameter_count
);
1270 if (all_parameters_are_constant
)
1271 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1273 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1275 instructions
->push_tail(var
);
1278 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1279 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1280 new(ctx
) ir_constant(i
));
1282 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
);
1283 instructions
->push_tail(assignment
);
1288 return new(ctx
) ir_dereference_variable(var
);
1293 * Determine if a list consists of a single scalar r-value
1296 single_scalar_parameter(exec_list
*parameters
)
1298 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1299 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1301 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1306 * Generate inline code for a vector constructor
1308 * The generated constructor code will consist of a temporary variable
1309 * declaration of the same type as the constructor. A sequence of assignments
1310 * from constructor parameters to the temporary will follow.
1313 * An \c ir_dereference_variable of the temprorary generated in the constructor
1317 emit_inline_vector_constructor(const glsl_type
*type
,
1318 exec_list
*instructions
,
1319 exec_list
*parameters
,
1322 assert(!parameters
->is_empty());
1324 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1325 instructions
->push_tail(var
);
1327 /* There are three kinds of vector constructors.
1329 * - Construct a vector from a single scalar by replicating that scalar to
1330 * all components of the vector.
1332 * - Construct a vector from at least a matrix. This case should already
1333 * have been taken care of in ast_function_expression::hir by breaking
1334 * down the matrix into a series of column vectors.
1336 * - Construct a vector from an arbirary combination of vectors and
1337 * scalars. The components of the constructor parameters are assigned
1338 * to the vector in order until the vector is full.
1340 const unsigned lhs_components
= type
->components();
1341 if (single_scalar_parameter(parameters
)) {
1342 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1343 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1345 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1346 const unsigned mask
= (1U << lhs_components
) - 1;
1348 assert(rhs
->type
== lhs
->type
);
1350 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1351 instructions
->push_tail(inst
);
1353 unsigned base_component
= 0;
1354 unsigned base_lhs_component
= 0;
1355 ir_constant_data data
;
1356 unsigned constant_mask
= 0, constant_components
= 0;
1358 memset(&data
, 0, sizeof(data
));
1360 foreach_in_list(ir_rvalue
, param
, parameters
) {
1361 unsigned rhs_components
= param
->type
->components();
1363 /* Do not try to assign more components to the vector than it has! */
1364 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1365 rhs_components
= lhs_components
- base_lhs_component
;
1368 const ir_constant
*const c
= param
->as_constant();
1370 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1371 switch (c
->type
->base_type
) {
1372 case GLSL_TYPE_UINT
:
1373 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1376 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1378 case GLSL_TYPE_FLOAT
:
1379 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1381 case GLSL_TYPE_DOUBLE
:
1382 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1384 case GLSL_TYPE_BOOL
:
1385 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1387 case GLSL_TYPE_UINT64
:
1388 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1390 case GLSL_TYPE_INT64
:
1391 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1394 assert(!"Should not get here.");
1399 /* Mask of fields to be written in the assignment. */
1400 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1401 constant_components
+= rhs_components
;
1403 base_component
+= rhs_components
;
1405 /* Advance the component index by the number of components
1406 * that were just assigned.
1408 base_lhs_component
+= rhs_components
;
1411 if (constant_mask
!= 0) {
1412 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1413 const glsl_type
*rhs_type
=
1414 glsl_type::get_instance(var
->type
->base_type
,
1415 constant_components
,
1417 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1419 ir_instruction
*inst
=
1420 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1421 instructions
->push_tail(inst
);
1425 foreach_in_list(ir_rvalue
, param
, parameters
) {
1426 unsigned rhs_components
= param
->type
->components();
1428 /* Do not try to assign more components to the vector than it has! */
1429 if ((rhs_components
+ base_component
) > lhs_components
) {
1430 rhs_components
= lhs_components
- base_component
;
1433 /* If we do not have any components left to copy, break out of the
1434 * loop. This can happen when initializing a vec4 with a mat3 as the
1435 * mat3 would have been broken into a series of column vectors.
1437 if (rhs_components
== 0) {
1441 const ir_constant
*const c
= param
->as_constant();
1443 /* Mask of fields to be written in the assignment. */
1444 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1447 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1449 /* Generate a swizzle so that LHS and RHS sizes match. */
1451 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1453 ir_instruction
*inst
=
1454 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1455 instructions
->push_tail(inst
);
1458 /* Advance the component index by the number of components that were
1461 base_component
+= rhs_components
;
1464 return new(ctx
) ir_dereference_variable(var
);
1469 * Generate assignment of a portion of a vector to a portion of a matrix column
1471 * \param src_base First component of the source to be used in assignment
1472 * \param column Column of destination to be assiged
1473 * \param row_base First component of the destination column to be assigned
1474 * \param count Number of components to be assigned
1477 * \c src_base + \c count must be less than or equal to the number of
1478 * components in the source vector.
1480 static ir_instruction
*
1481 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1482 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1485 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1486 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1489 assert(column_ref
->type
->components() >= (row_base
+ count
));
1490 assert(src
->type
->components() >= (src_base
+ count
));
1492 /* Generate a swizzle that extracts the number of components from the source
1493 * that are to be assigned to the column of the matrix.
1495 if (count
< src
->type
->vector_elements
) {
1496 src
= new(mem_ctx
) ir_swizzle(src
,
1497 src_base
+ 0, src_base
+ 1,
1498 src_base
+ 2, src_base
+ 3,
1502 /* Mask of fields to be written in the assignment. */
1503 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1505 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1510 * Generate inline code for a matrix constructor
1512 * The generated constructor code will consist of a temporary variable
1513 * declaration of the same type as the constructor. A sequence of assignments
1514 * from constructor parameters to the temporary will follow.
1517 * An \c ir_dereference_variable of the temprorary generated in the constructor
1521 emit_inline_matrix_constructor(const glsl_type
*type
,
1522 exec_list
*instructions
,
1523 exec_list
*parameters
,
1526 assert(!parameters
->is_empty());
1528 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1529 instructions
->push_tail(var
);
1531 /* There are three kinds of matrix constructors.
1533 * - Construct a matrix from a single scalar by replicating that scalar to
1534 * along the diagonal of the matrix and setting all other components to
1537 * - Construct a matrix from an arbirary combination of vectors and
1538 * scalars. The components of the constructor parameters are assigned
1539 * to the matrix in column-major order until the matrix is full.
1541 * - Construct a matrix from a single matrix. The source matrix is copied
1542 * to the upper left portion of the constructed matrix, and the remaining
1543 * elements take values from the identity matrix.
1545 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1546 if (single_scalar_parameter(parameters
)) {
1547 /* Assign the scalar to the X component of a vec4, and fill the remaining
1548 * components with zero.
1550 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1551 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1552 ir_variable
*rhs_var
=
1553 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1556 instructions
->push_tail(rhs_var
);
1558 ir_constant_data zero
;
1559 for (unsigned i
= 0; i
< 4; i
++)
1560 if (first_param
->type
->is_float())
1565 ir_instruction
*inst
=
1566 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1567 new(ctx
) ir_constant(rhs_var
->type
, &zero
));
1568 instructions
->push_tail(inst
);
1570 ir_dereference
*const rhs_ref
=
1571 new(ctx
) ir_dereference_variable(rhs_var
);
1573 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1574 instructions
->push_tail(inst
);
1576 /* Assign the temporary vector to each column of the destination matrix
1577 * with a swizzle that puts the X component on the diagonal of the
1578 * matrix. In some cases this may mean that the X component does not
1579 * get assigned into the column at all (i.e., when the matrix has more
1580 * columns than rows).
1582 static const unsigned rhs_swiz
[4][4] = {
1589 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1590 type
->vector_elements
);
1591 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1592 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1593 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1596 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1597 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1598 type
->vector_elements
);
1600 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1601 instructions
->push_tail(inst
);
1604 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1605 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1606 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1609 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1610 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1611 type
->vector_elements
);
1613 inst
= new(ctx
) ir_assignment(col_ref
, rhs
);
1614 instructions
->push_tail(inst
);
1616 } else if (first_param
->type
->is_matrix()) {
1617 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1619 * "If a matrix is constructed from a matrix, then each component
1620 * (column i, row j) in the result that has a corresponding
1621 * component (column i, row j) in the argument will be initialized
1622 * from there. All other components will be initialized to the
1623 * identity matrix. If a matrix argument is given to a matrix
1624 * constructor, it is an error to have any other arguments."
1626 assert(first_param
->next
->is_tail_sentinel());
1627 ir_rvalue
*const src_matrix
= first_param
;
1629 /* If the source matrix is smaller, pre-initialize the relavent parts of
1630 * the destination matrix to the identity matrix.
1632 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1633 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1635 /* If the source matrix has fewer rows, every column of the
1636 * destination must be initialized. Otherwise only the columns in
1637 * the destination that do not exist in the source must be
1641 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1642 ? 0 : src_matrix
->type
->matrix_columns
;
1644 const glsl_type
*const col_type
= var
->type
->column_type();
1645 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1646 ir_constant_data ident
;
1648 if (!col_type
->is_double()) {
1653 ident
.f
[col
] = 1.0f
;
1662 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1664 ir_rvalue
*const lhs
=
1665 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1667 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
);
1668 instructions
->push_tail(inst
);
1672 /* Assign columns from the source matrix to the destination matrix.
1674 * Since the parameter will be used in the RHS of multiple assignments,
1675 * generate a temporary and copy the paramter there.
1677 ir_variable
*const rhs_var
=
1678 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1680 instructions
->push_tail(rhs_var
);
1682 ir_dereference
*const rhs_var_ref
=
1683 new(ctx
) ir_dereference_variable(rhs_var
);
1684 ir_instruction
*const inst
=
1685 new(ctx
) ir_assignment(rhs_var_ref
, first_param
);
1686 instructions
->push_tail(inst
);
1688 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1689 var
->type
->vector_elements
);
1690 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1691 var
->type
->matrix_columns
);
1693 unsigned swiz
[4] = { 0, 0, 0, 0 };
1694 for (unsigned i
= 1; i
< last_row
; i
++)
1697 const unsigned write_mask
= (1U << last_row
) - 1;
1699 for (unsigned i
= 0; i
< last_col
; i
++) {
1700 ir_dereference
*const lhs
=
1701 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1702 ir_rvalue
*const rhs_col
=
1703 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1705 /* If one matrix has columns that are smaller than the columns of the
1706 * other matrix, wrap the column access of the larger with a swizzle
1707 * so that the LHS and RHS of the assignment have the same size (and
1708 * therefore have the same type).
1710 * It would be perfectly valid to unconditionally generate the
1711 * swizzles, this this will typically result in a more compact IR
1715 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1716 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1721 ir_instruction
*inst
=
1722 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1723 instructions
->push_tail(inst
);
1726 const unsigned cols
= type
->matrix_columns
;
1727 const unsigned rows
= type
->vector_elements
;
1728 unsigned remaining_slots
= rows
* cols
;
1729 unsigned col_idx
= 0;
1730 unsigned row_idx
= 0;
1732 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1733 unsigned rhs_components
= rhs
->type
->components();
1734 unsigned rhs_base
= 0;
1736 if (remaining_slots
== 0)
1739 /* Since the parameter might be used in the RHS of two assignments,
1740 * generate a temporary and copy the paramter there.
1742 ir_variable
*rhs_var
=
1743 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1744 instructions
->push_tail(rhs_var
);
1746 ir_dereference
*rhs_var_ref
=
1747 new(ctx
) ir_dereference_variable(rhs_var
);
1748 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
);
1749 instructions
->push_tail(inst
);
1752 /* Assign the current parameter to as many components of the matrix
1755 * NOTE: A single vector parameter can span two matrix columns. A
1756 * single vec4, for example, can completely fill a mat2.
1758 unsigned count
= MIN2(rows
- row_idx
,
1759 rhs_components
- rhs_base
);
1761 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1762 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1767 instructions
->push_tail(inst
);
1770 remaining_slots
-= count
;
1772 /* Sometimes, there is still data left in the parameters and
1773 * components left to be set in the destination but in other
1776 if (row_idx
>= rows
) {
1780 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1784 return new(ctx
) ir_dereference_variable(var
);
1789 emit_inline_record_constructor(const glsl_type
*type
,
1790 exec_list
*instructions
,
1791 exec_list
*parameters
,
1794 ir_variable
*const var
=
1795 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1796 ir_dereference_variable
*const d
=
1797 new(mem_ctx
) ir_dereference_variable(var
);
1799 instructions
->push_tail(var
);
1801 exec_node
*node
= parameters
->get_head_raw();
1802 for (unsigned i
= 0; i
< type
->length
; i
++) {
1803 assert(!node
->is_tail_sentinel());
1805 ir_dereference
*const lhs
=
1806 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1807 type
->fields
.structure
[i
].name
);
1809 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1810 assert(rhs
!= NULL
);
1812 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
1814 instructions
->push_tail(assign
);
1823 process_record_constructor(exec_list
*instructions
,
1824 const glsl_type
*constructor_type
,
1825 YYLTYPE
*loc
, exec_list
*parameters
,
1826 struct _mesa_glsl_parse_state
*state
)
1829 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1831 * "The arguments to the constructor will be used to set the structure's
1832 * fields, in order, using one argument per field. Each argument must
1833 * be the same type as the field it sets, or be a type that can be
1834 * converted to the field's type according to Section 4.1.10 “Implicit
1837 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1839 * "In all cases, the innermost initializer (i.e., not a list of
1840 * initializers enclosed in curly braces) applied to an object must
1841 * have the same type as the object being initialized or be a type that
1842 * can be converted to the object's type according to section 4.1.10
1843 * "Implicit Conversions". In the latter case, an implicit conversion
1844 * will be done on the initializer before the assignment is done."
1846 exec_list actual_parameters
;
1848 const unsigned parameter_count
=
1849 process_parameters(instructions
, &actual_parameters
, parameters
,
1852 if (parameter_count
!= constructor_type
->length
) {
1853 _mesa_glsl_error(loc
, state
,
1854 "%s parameters in constructor for `%s'",
1855 parameter_count
> constructor_type
->length
1856 ? "too many": "insufficient",
1857 constructor_type
->name
);
1858 return ir_rvalue::error_value(ctx
);
1861 bool all_parameters_are_constant
= true;
1864 /* Type cast each parameter and, if possible, fold constants. */
1865 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1867 const glsl_struct_field
*struct_field
=
1868 &constructor_type
->fields
.structure
[i
];
1870 /* Apply implicit conversions (not the scalar constructor rules, see the
1871 * spec quote above!) and attempt to convert the parameter to a constant
1872 * valued expression. After doing so, track whether or not all the
1873 * parameters to the constructor are trivially constant valued
1876 all_parameters_are_constant
&=
1877 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1880 if (ir
->type
!= struct_field
->type
) {
1881 _mesa_glsl_error(loc
, state
,
1882 "parameter type mismatch in constructor for `%s.%s' "
1884 constructor_type
->name
,
1887 struct_field
->type
->name
);
1888 return ir_rvalue::error_value(ctx
);
1894 if (all_parameters_are_constant
) {
1895 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1897 return emit_inline_record_constructor(constructor_type
, instructions
,
1898 &actual_parameters
, state
);
1903 ast_function_expression::handle_method(exec_list
*instructions
,
1904 struct _mesa_glsl_parse_state
*state
)
1906 const ast_expression
*field
= subexpressions
[0];
1910 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1911 YYLTYPE loc
= get_location();
1912 state
->check_version(120, 300, &loc
, "methods not supported");
1915 method
= field
->primary_expression
.identifier
;
1917 /* This would prevent to raise "uninitialized variable" warnings when
1918 * calling array.length.
1920 field
->subexpressions
[0]->set_is_lhs(true);
1921 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1922 if (strcmp(method
, "length") == 0) {
1923 if (!this->expressions
.is_empty()) {
1924 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1928 if (op
->type
->is_array()) {
1929 if (op
->type
->is_unsized_array()) {
1930 if (!state
->has_shader_storage_buffer_objects()) {
1931 _mesa_glsl_error(&loc
, state
,
1932 "length called on unsized array"
1933 " only available with"
1934 " ARB_shader_storage_buffer_object");
1936 /* Calculate length of an unsized array in run-time */
1937 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
1940 result
= new(ctx
) ir_constant(op
->type
->array_size());
1942 } else if (op
->type
->is_vector()) {
1943 if (state
->has_420pack()) {
1944 /* .length() returns int. */
1945 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1947 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1948 " available with ARB_shading_language_420pack");
1951 } else if (op
->type
->is_matrix()) {
1952 if (state
->has_420pack()) {
1953 /* .length() returns int. */
1954 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1956 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1957 " available with ARB_shading_language_420pack");
1961 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1965 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1970 return ir_rvalue::error_value(ctx
);
1973 static inline bool is_valid_constructor(const glsl_type
*type
,
1974 struct _mesa_glsl_parse_state
*state
)
1976 return type
->is_numeric() || type
->is_boolean() ||
1977 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
1981 ast_function_expression::hir(exec_list
*instructions
,
1982 struct _mesa_glsl_parse_state
*state
)
1985 /* There are three sorts of function calls.
1987 * 1. constructors - The first subexpression is an ast_type_specifier.
1988 * 2. methods - Only the .length() method of array types.
1989 * 3. functions - Calls to regular old functions.
1992 if (is_constructor()) {
1993 const ast_type_specifier
*type
=
1994 (ast_type_specifier
*) subexpressions
[0];
1995 YYLTYPE loc
= type
->get_location();
1998 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
2000 /* constructor_type can be NULL if a variable with the same name as the
2001 * structure has come into scope.
2003 if (constructor_type
== NULL
) {
2004 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
2005 "may be shadowed by a variable with the same name)",
2007 return ir_rvalue::error_value(ctx
);
2011 /* Constructors for opaque types are illegal.
2013 * From section 4.1.7 of the ARB_bindless_texture spec:
2015 * "Samplers are represented using 64-bit integer handles, and may be "
2016 * converted to and from 64-bit integers using constructors."
2018 * From section 4.1.X of the ARB_bindless_texture spec:
2020 * "Images are represented using 64-bit integer handles, and may be
2021 * converted to and from 64-bit integers using constructors."
2023 if (constructor_type
->contains_atomic() ||
2024 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2025 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2026 state
->has_bindless() ? "atomic" : "opaque",
2027 constructor_type
->name
);
2028 return ir_rvalue::error_value(ctx
);
2031 if (constructor_type
->is_subroutine()) {
2032 _mesa_glsl_error(& loc
, state
,
2033 "subroutine name cannot be a constructor `%s'",
2034 constructor_type
->name
);
2035 return ir_rvalue::error_value(ctx
);
2038 if (constructor_type
->is_array()) {
2039 if (!state
->check_version(120, 300, &loc
,
2040 "array constructors forbidden")) {
2041 return ir_rvalue::error_value(ctx
);
2044 return process_array_constructor(instructions
, constructor_type
,
2045 & loc
, &this->expressions
, state
);
2049 /* There are two kinds of constructor calls. Constructors for arrays and
2050 * structures must have the exact number of arguments with matching types
2051 * in the correct order. These constructors follow essentially the same
2052 * type matching rules as functions.
2054 * Constructors for built-in language types, such as mat4 and vec2, are
2055 * free form. The only requirements are that the parameters must provide
2056 * enough values of the correct scalar type and that no arguments are
2057 * given past the last used argument.
2059 * When using the C-style initializer syntax from GLSL 4.20, constructors
2060 * must have the exact number of arguments with matching types in the
2063 if (constructor_type
->is_record()) {
2064 return process_record_constructor(instructions
, constructor_type
,
2065 &loc
, &this->expressions
,
2069 if (!is_valid_constructor(constructor_type
, state
))
2070 return ir_rvalue::error_value(ctx
);
2072 /* Total number of components of the type being constructed. */
2073 const unsigned type_components
= constructor_type
->components();
2075 /* Number of components from parameters that have actually been
2076 * consumed. This is used to perform several kinds of error checking.
2078 unsigned components_used
= 0;
2080 unsigned matrix_parameters
= 0;
2081 unsigned nonmatrix_parameters
= 0;
2082 exec_list actual_parameters
;
2084 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2085 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2087 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2089 * "It is an error to provide extra arguments beyond this
2090 * last used argument."
2092 if (components_used
>= type_components
) {
2093 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2095 constructor_type
->name
);
2096 return ir_rvalue::error_value(ctx
);
2099 if (!is_valid_constructor(result
->type
, state
)) {
2100 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2101 "non-numeric data type",
2102 constructor_type
->name
);
2103 return ir_rvalue::error_value(ctx
);
2106 /* Count the number of matrix and nonmatrix parameters. This
2107 * is used below to enforce some of the constructor rules.
2109 if (result
->type
->is_matrix())
2110 matrix_parameters
++;
2112 nonmatrix_parameters
++;
2114 actual_parameters
.push_tail(result
);
2115 components_used
+= result
->type
->components();
2118 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2120 * "It is an error to construct matrices from other matrices. This
2121 * is reserved for future use."
2123 if (matrix_parameters
> 0
2124 && constructor_type
->is_matrix()
2125 && !state
->check_version(120, 100, &loc
,
2126 "cannot construct `%s' from a matrix",
2127 constructor_type
->name
)) {
2128 return ir_rvalue::error_value(ctx
);
2131 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2133 * "If a matrix argument is given to a matrix constructor, it is
2134 * an error to have any other arguments."
2136 if ((matrix_parameters
> 0)
2137 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2138 && constructor_type
->is_matrix()) {
2139 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2140 "matrix must be only parameter",
2141 constructor_type
->name
);
2142 return ir_rvalue::error_value(ctx
);
2145 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2147 * "In these cases, there must be enough components provided in the
2148 * arguments to provide an initializer for every component in the
2149 * constructed value."
2151 if (components_used
< type_components
&& components_used
!= 1
2152 && matrix_parameters
== 0) {
2153 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2155 constructor_type
->name
);
2156 return ir_rvalue::error_value(ctx
);
2159 /* Matrices can never be consumed as is by any constructor but matrix
2160 * constructors. If the constructor type is not matrix, always break the
2161 * matrix up into a series of column vectors.
2163 if (!constructor_type
->is_matrix()) {
2164 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2165 if (!matrix
->type
->is_matrix())
2168 /* Create a temporary containing the matrix. */
2169 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2171 instructions
->push_tail(var
);
2172 instructions
->push_tail(
2173 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2175 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2177 /* Replace the matrix with dereferences of its columns. */
2178 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2179 matrix
->insert_before(
2180 new (ctx
) ir_dereference_array(var
,
2181 new(ctx
) ir_constant(i
)));
2187 bool all_parameters_are_constant
= true;
2189 /* Type cast each parameter and, if possible, fold constants.*/
2190 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2191 const glsl_type
*desired_type
;
2193 /* From section 5.4.1 of the ARB_bindless_texture spec:
2195 * "In the following four constructors, the low 32 bits of the sampler
2196 * type correspond to the .x component of the uvec2 and the high 32
2197 * bits correspond to the .y component."
2199 * uvec2(any sampler type) // Converts a sampler type to a
2200 * // pair of 32-bit unsigned integers
2201 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2203 * uvec2(any image type) // Converts an image type to a
2204 * // pair of 32-bit unsigned integers
2205 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2208 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2209 /* Convert a sampler/image type to a pair of 32-bit unsigned
2210 * integers as defined by ARB_bindless_texture.
2212 if (constructor_type
!= glsl_type::uvec2_type
) {
2213 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2214 "be converted to a pair of 32-bit unsigned "
2217 desired_type
= glsl_type::uvec2_type
;
2218 } else if (constructor_type
->is_sampler() ||
2219 constructor_type
->is_image()) {
2220 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2221 * type as defined by ARB_bindless_texture.
2223 if (ir
->type
!= glsl_type::uvec2_type
) {
2224 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2225 "be converted from a pair of 32-bit unsigned "
2228 desired_type
= constructor_type
;
2231 glsl_type::get_instance(constructor_type
->base_type
,
2232 ir
->type
->vector_elements
,
2233 ir
->type
->matrix_columns
);
2236 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2238 /* Attempt to convert the parameter to a constant valued expression.
2239 * After doing so, track whether or not all the parameters to the
2240 * constructor are trivially constant valued expressions.
2242 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2244 if (constant
!= NULL
)
2247 all_parameters_are_constant
= false;
2250 ir
->replace_with(result
);
2254 /* If all of the parameters are trivially constant, create a
2255 * constant representing the complete collection of parameters.
2257 if (all_parameters_are_constant
) {
2258 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2259 } else if (constructor_type
->is_scalar()) {
2260 return dereference_component((ir_rvalue
*)
2261 actual_parameters
.get_head_raw(),
2263 } else if (constructor_type
->is_vector()) {
2264 return emit_inline_vector_constructor(constructor_type
,
2269 assert(constructor_type
->is_matrix());
2270 return emit_inline_matrix_constructor(constructor_type
,
2275 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2276 return handle_method(instructions
, state
);
2278 const ast_expression
*id
= subexpressions
[0];
2279 const char *func_name
= NULL
;
2280 YYLTYPE loc
= get_location();
2281 exec_list actual_parameters
;
2282 ir_variable
*sub_var
= NULL
;
2283 ir_rvalue
*array_idx
= NULL
;
2285 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2288 if (id
->oper
== ast_array_index
) {
2289 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2290 id
->subexpressions
[0],
2291 id
->subexpressions
[1], &func_name
,
2292 &actual_parameters
);
2293 } else if (id
->oper
== ast_identifier
) {
2294 func_name
= id
->primary_expression
.identifier
;
2296 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2299 /* an error was emitted earlier */
2301 return ir_rvalue::error_value(ctx
);
2303 ir_function_signature
*sig
=
2304 match_function_by_name(func_name
, &actual_parameters
, state
);
2306 ir_rvalue
*value
= NULL
;
2308 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2313 no_matching_function_error(func_name
, &loc
,
2314 &actual_parameters
, state
);
2315 value
= ir_rvalue::error_value(ctx
);
2316 } else if (!verify_parameter_modes(state
, sig
,
2318 this->expressions
)) {
2319 /* an error has already been emitted */
2320 value
= ir_rvalue::error_value(ctx
);
2321 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2322 /* ftransform refers to global variables, and we don't have any code
2323 * for remapping the variable references in the built-in shader.
2326 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2327 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2328 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2329 new(ctx
) ir_dereference_variable(mvp
),
2330 new(ctx
) ir_dereference_variable(vtx
));
2332 if (state
->stage
== MESA_SHADER_TESS_CTRL
&&
2333 sig
->is_builtin() && strcmp(func_name
, "barrier") == 0) {
2334 if (state
->current_function
== NULL
||
2335 strcmp(state
->current_function
->function_name(), "main") != 0) {
2336 _mesa_glsl_error(&loc
, state
,
2337 "barrier() may only be used in main()");
2340 if (state
->found_return
) {
2341 _mesa_glsl_error(&loc
, state
,
2342 "barrier() may not be used after return");
2345 if (instructions
!= &state
->current_function
->body
) {
2346 _mesa_glsl_error(&loc
, state
,
2347 "barrier() may not be used in control flow");
2351 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2354 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2357 instructions
->push_tail(tmp
);
2358 value
= new(ctx
) ir_dereference_variable(tmp
);
2365 unreachable("not reached");
2369 ast_function_expression::has_sequence_subexpression() const
2371 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2372 if (ast
->has_sequence_subexpression())
2380 ast_aggregate_initializer::hir(exec_list
*instructions
,
2381 struct _mesa_glsl_parse_state
*state
)
2384 YYLTYPE loc
= this->get_location();
2386 if (!this->constructor_type
) {
2387 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2388 return ir_rvalue::error_value(ctx
);
2390 const glsl_type
*const constructor_type
= this->constructor_type
;
2392 if (!state
->has_420pack()) {
2393 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2394 "GL_ARB_shading_language_420pack extension");
2395 return ir_rvalue::error_value(ctx
);
2398 if (constructor_type
->is_array()) {
2399 return process_array_constructor(instructions
, constructor_type
, &loc
,
2400 &this->expressions
, state
);
2403 if (constructor_type
->is_record()) {
2404 return process_record_constructor(instructions
, constructor_type
, &loc
,
2405 &this->expressions
, state
);
2408 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2409 &this->expressions
, state
);