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/core.h" /* for MIN2 */
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
)
42 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
43 /* We need to process the parameters first in order to know if we can
44 * raise or not a unitialized warning. Calling set_is_lhs silence the
45 * warning for now. Raising the warning or not will be checked at
46 * verify_parameter_modes.
48 ast
->set_is_lhs(true);
49 ir_rvalue
*result
= ast
->hir(instructions
, state
);
51 ir_constant
*const constant
= result
->constant_expression_value();
55 actual_parameters
->push_tail(result
);
64 * Generate a source prototype for a function signature
66 * \param return_type Return type of the function. May be \c NULL.
67 * \param name Name of the function.
68 * \param parameters List of \c ir_instruction nodes representing the
69 * parameter list for the function. This may be either a
70 * formal (\c ir_variable) or actual (\c ir_rvalue)
71 * parameter list. Only the type is used.
74 * A ralloced string representing the prototype of the function.
77 prototype_string(const glsl_type
*return_type
, const char *name
,
78 exec_list
*parameters
)
82 if (return_type
!= NULL
)
83 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
85 ralloc_asprintf_append(&str
, "%s(", name
);
87 const char *comma
= "";
88 foreach_in_list(const ir_variable
, param
, parameters
) {
89 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
93 ralloc_strcat(&str
, ")");
98 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
99 const ir_variable
*formal
, const ir_variable
*actual
)
102 * From the ARB_shader_image_load_store specification:
104 * "The values of image variables qualified with coherent,
105 * volatile, restrict, readonly, or writeonly may not be passed
106 * to functions whose formal parameters lack such
107 * qualifiers. [...] It is legal to have additional qualifiers
108 * on a formal parameter, but not to have fewer."
110 if (actual
->data
.memory_coherent
&& !formal
->data
.memory_coherent
) {
111 _mesa_glsl_error(loc
, state
,
112 "function call parameter `%s' drops "
113 "`coherent' qualifier", formal
->name
);
117 if (actual
->data
.memory_volatile
&& !formal
->data
.memory_volatile
) {
118 _mesa_glsl_error(loc
, state
,
119 "function call parameter `%s' drops "
120 "`volatile' qualifier", formal
->name
);
124 if (actual
->data
.memory_restrict
&& !formal
->data
.memory_restrict
) {
125 _mesa_glsl_error(loc
, state
,
126 "function call parameter `%s' drops "
127 "`restrict' qualifier", formal
->name
);
131 if (actual
->data
.memory_read_only
&& !formal
->data
.memory_read_only
) {
132 _mesa_glsl_error(loc
, state
,
133 "function call parameter `%s' drops "
134 "`readonly' qualifier", formal
->name
);
138 if (actual
->data
.memory_write_only
&& !formal
->data
.memory_write_only
) {
139 _mesa_glsl_error(loc
, state
,
140 "function call parameter `%s' drops "
141 "`writeonly' qualifier", formal
->name
);
149 verify_first_atomic_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
153 (!var
->is_in_shader_storage_block() &&
154 var
->data
.mode
!= ir_var_shader_shared
)) {
155 _mesa_glsl_error(loc
, state
, "First argument to atomic function "
156 "must be a buffer or shared variable");
163 is_atomic_function(const char *func_name
)
165 return !strcmp(func_name
, "atomicAdd") ||
166 !strcmp(func_name
, "atomicMin") ||
167 !strcmp(func_name
, "atomicMax") ||
168 !strcmp(func_name
, "atomicAnd") ||
169 !strcmp(func_name
, "atomicOr") ||
170 !strcmp(func_name
, "atomicXor") ||
171 !strcmp(func_name
, "atomicExchange") ||
172 !strcmp(func_name
, "atomicCompSwap");
176 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
177 * that 'const_in' formal parameters (an extension in our IR) correspond to
178 * ir_constant actual parameters.
181 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
182 ir_function_signature
*sig
,
183 exec_list
&actual_ir_parameters
,
184 exec_list
&actual_ast_parameters
)
186 exec_node
*actual_ir_node
= actual_ir_parameters
.get_head_raw();
187 exec_node
*actual_ast_node
= actual_ast_parameters
.get_head_raw();
189 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
190 /* The lists must be the same length. */
191 assert(!actual_ir_node
->is_tail_sentinel());
192 assert(!actual_ast_node
->is_tail_sentinel());
194 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
195 const ast_expression
*const actual_ast
=
196 exec_node_data(ast_expression
, actual_ast_node
, link
);
198 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
201 YYLTYPE loc
= actual_ast
->get_location();
203 /* Verify that 'const_in' parameters are ir_constants. */
204 if (formal
->data
.mode
== ir_var_const_in
&&
205 actual
->ir_type
!= ir_type_constant
) {
206 _mesa_glsl_error(&loc
, state
,
207 "parameter `in %s' must be a constant expression",
212 /* Verify that shader_in parameters are shader inputs */
213 if (formal
->data
.must_be_shader_input
) {
214 const ir_rvalue
*val
= actual
;
216 /* GLSL 4.40 allows swizzles, while earlier GLSL versions do not. */
217 if (val
->ir_type
== ir_type_swizzle
) {
218 if (!state
->is_version(440, 0)) {
219 _mesa_glsl_error(&loc
, state
,
220 "parameter `%s` must not be swizzled",
224 val
= ((ir_swizzle
*)val
)->val
;
227 while (val
->ir_type
== ir_type_dereference_array
) {
228 val
= ((ir_dereference_array
*)val
)->array
;
231 if (!val
->as_dereference_variable() ||
232 val
->variable_referenced()->data
.mode
!= ir_var_shader_in
) {
233 _mesa_glsl_error(&loc
, state
,
234 "parameter `%s` must be a shader input",
239 val
->variable_referenced()->data
.must_be_shader_input
= 1;
242 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
243 if (formal
->data
.mode
== ir_var_function_out
244 || formal
->data
.mode
== ir_var_function_inout
) {
245 const char *mode
= NULL
;
246 switch (formal
->data
.mode
) {
247 case ir_var_function_out
: mode
= "out"; break;
248 case ir_var_function_inout
: mode
= "inout"; break;
249 default: assert(false); break;
252 /* This AST-based check catches errors like f(i++). The IR-based
253 * is_lvalue() is insufficient because the actual parameter at the
254 * IR-level is just a temporary value, which is an l-value.
256 if (actual_ast
->non_lvalue_description
!= NULL
) {
257 _mesa_glsl_error(&loc
, state
,
258 "function parameter '%s %s' references a %s",
260 actual_ast
->non_lvalue_description
);
264 ir_variable
*var
= actual
->variable_referenced();
266 if (var
&& formal
->data
.mode
== ir_var_function_inout
) {
267 if ((var
->data
.mode
== ir_var_auto
||
268 var
->data
.mode
== ir_var_shader_out
) &&
269 !var
->data
.assigned
&&
270 !is_gl_identifier(var
->name
)) {
271 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
277 var
->data
.assigned
= true;
279 if (var
&& var
->data
.read_only
) {
280 _mesa_glsl_error(&loc
, state
,
281 "function parameter '%s %s' references the "
282 "read-only variable '%s'",
284 actual
->variable_referenced()->name
);
286 } else if (!actual
->is_lvalue(state
)) {
287 _mesa_glsl_error(&loc
, state
,
288 "function parameter '%s %s' is not an lvalue",
293 assert(formal
->data
.mode
== ir_var_function_in
||
294 formal
->data
.mode
== ir_var_const_in
);
295 ir_variable
*var
= actual
->variable_referenced();
297 if ((var
->data
.mode
== ir_var_auto
||
298 var
->data
.mode
== ir_var_shader_out
) &&
299 !var
->data
.assigned
&&
300 !is_gl_identifier(var
->name
)) {
301 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
307 if (formal
->type
->is_image() &&
308 actual
->variable_referenced()) {
309 if (!verify_image_parameter(&loc
, state
, formal
,
310 actual
->variable_referenced()))
314 actual_ir_node
= actual_ir_node
->next
;
315 actual_ast_node
= actual_ast_node
->next
;
318 /* The first parameter of atomic functions must be a buffer variable */
319 const char *func_name
= sig
->function_name();
320 bool is_atomic
= is_atomic_function(func_name
);
322 const ir_rvalue
*const actual
=
323 (ir_rvalue
*) actual_ir_parameters
.get_head_raw();
325 const ast_expression
*const actual_ast
=
326 exec_node_data(ast_expression
,
327 actual_ast_parameters
.get_head_raw(), link
);
328 YYLTYPE loc
= actual_ast
->get_location();
330 if (!verify_first_atomic_parameter(&loc
, state
,
331 actual
->variable_referenced())) {
340 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
341 exec_list
*before_instructions
, exec_list
*after_instructions
,
342 bool parameter_is_inout
)
344 ir_expression
*const expr
= actual
->as_expression();
346 /* If the types match exactly and the parameter is not a vector-extract,
347 * nothing needs to be done to fix the parameter.
349 if (formal_type
== actual
->type
350 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
353 /* To convert an out parameter, we need to create a temporary variable to
354 * hold the value before conversion, and then perform the conversion after
355 * the function call returns.
357 * This has the effect of transforming code like this:
363 * Into IR that's equivalent to this:
367 * int out_parameter_conversion;
368 * f(out_parameter_conversion);
369 * value = float(out_parameter_conversion);
371 * If the parameter is an ir_expression of ir_binop_vector_extract,
372 * additional conversion is needed in the post-call re-write.
375 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
377 before_instructions
->push_tail(tmp
);
379 /* If the parameter is an inout parameter, copy the value of the actual
380 * parameter to the new temporary. Note that no type conversion is allowed
381 * here because inout parameters must match types exactly.
383 if (parameter_is_inout
) {
384 /* Inout parameters should never require conversion, since that would
385 * require an implicit conversion to exist both to and from the formal
386 * parameter type, and there are no bidirectional implicit conversions.
388 assert (actual
->type
== formal_type
);
390 ir_dereference_variable
*const deref_tmp_1
=
391 new(mem_ctx
) ir_dereference_variable(tmp
);
392 ir_assignment
*const assignment
=
393 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
394 before_instructions
->push_tail(assignment
);
397 /* Replace the parameter in the call with a dereference of the new
400 ir_dereference_variable
*const deref_tmp_2
=
401 new(mem_ctx
) ir_dereference_variable(tmp
);
402 actual
->replace_with(deref_tmp_2
);
405 /* Copy the temporary variable to the actual parameter with optional
406 * type conversion applied.
408 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
409 if (actual
->type
!= formal_type
)
410 rhs
= convert_component(rhs
, actual
->type
);
412 ir_rvalue
*lhs
= actual
;
413 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
414 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
416 expr
->operands
[1]->clone(mem_ctx
,
420 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
421 after_instructions
->push_tail(assignment_2
);
425 * Generate a function call.
427 * For non-void functions, this returns a dereference of the temporary
428 * variable which stores the return value for the call. For void functions,
432 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
433 exec_list
*actual_parameters
,
434 ir_variable
*sub_var
,
435 ir_rvalue
*array_idx
,
436 struct _mesa_glsl_parse_state
*state
,
437 bool inline_immediately
)
440 exec_list post_call_conversions
;
442 /* Perform implicit conversion of arguments. For out parameters, we need
443 * to place them in a temporary variable and do the conversion after the
444 * call takes place. Since we haven't emitted the call yet, we'll place
445 * the post-call conversions in a temporary exec_list, and emit them later.
447 foreach_two_lists(formal_node
, &sig
->parameters
,
448 actual_node
, actual_parameters
) {
449 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
450 ir_variable
*formal
= (ir_variable
*) formal_node
;
452 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
453 switch (formal
->data
.mode
) {
454 case ir_var_const_in
:
455 case ir_var_function_in
: {
457 = convert_component(actual
, formal
->type
);
458 actual
->replace_with(converted
);
461 case ir_var_function_out
:
462 case ir_var_function_inout
:
463 fix_parameter(ctx
, actual
, formal
->type
,
464 instructions
, &post_call_conversions
,
465 formal
->data
.mode
== ir_var_function_inout
);
468 assert (!"Illegal formal parameter mode");
474 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
476 * "Initializers for const declarations must be formed from literal
477 * values, other const variables (not including function call
478 * paramaters), or expressions of these.
480 * Constructors may be used in such expressions, but function calls may
483 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
485 * "A constant expression is one of
489 * - a built-in function call whose arguments are all constant
490 * expressions, with the exception of the texture lookup
491 * functions, the noise functions, and ftransform. The built-in
492 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
493 * inside an initializer with an argument that is a constant
496 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
498 * "A constant expression is one of
502 * - a built-in function call whose arguments are all constant
503 * expressions, with the exception of the texture lookup
506 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
508 * "A constant expression is one of
512 * - a built-in function call whose arguments are all constant
513 * expressions, with the exception of the texture lookup
514 * functions. The built-in functions dFdx, dFdy, and fwidth must
515 * return 0 when evaluated inside an initializer with an argument
516 * that is a constant expression."
518 * If the function call is a constant expression, don't generate any
519 * instructions; just generate an ir_constant.
521 if (state
->is_version(120, 100)) {
522 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
,
529 ir_dereference_variable
*deref
= NULL
;
530 if (!sig
->return_type
->is_void()) {
531 /* Create a new temporary to hold the return value. */
532 char *const name
= ir_variable::temporaries_allocate_names
533 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
538 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
539 instructions
->push_tail(var
);
543 deref
= new(ctx
) ir_dereference_variable(var
);
546 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
547 actual_parameters
, sub_var
, array_idx
);
548 instructions
->push_tail(call
);
549 if (inline_immediately
) {
550 call
->generate_inline(call
);
554 /* Also emit any necessary out-parameter conversions. */
555 instructions
->append_list(&post_call_conversions
);
557 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
561 * Given a function name and parameter list, find the matching signature.
563 static ir_function_signature
*
564 match_function_by_name(const char *name
,
565 exec_list
*actual_parameters
,
566 struct _mesa_glsl_parse_state
*state
)
568 ir_function
*f
= state
->symbols
->get_function(name
);
569 ir_function_signature
*local_sig
= NULL
;
570 ir_function_signature
*sig
= NULL
;
572 /* Is the function hidden by a record type constructor? */
573 if (state
->symbols
->get_type(name
))
574 return sig
; /* no match */
576 /* Is the function hidden by a variable (impossible in 1.10)? */
577 if (!state
->symbols
->separate_function_namespace
578 && state
->symbols
->get_variable(name
))
579 return sig
; /* no match */
582 /* In desktop GL, the presence of a user-defined signature hides any
583 * built-in signatures, so we must ignore them. In contrast, in ES2
584 * user-defined signatures add new overloads, so we must consider them.
586 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
588 /* Look for a match in the local shader. If exact, we're done. */
589 bool is_exact
= false;
590 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
591 allow_builtins
, &is_exact
);
599 /* Local shader has no exact candidates; check the built-ins. */
600 _mesa_glsl_initialize_builtin_functions();
601 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
605 static ir_function_signature
*
606 match_subroutine_by_name(const char *name
,
607 exec_list
*actual_parameters
,
608 struct _mesa_glsl_parse_state
*state
,
612 ir_function_signature
*sig
= NULL
;
613 ir_function
*f
, *found
= NULL
;
614 const char *new_name
;
616 bool is_exact
= false;
619 ralloc_asprintf(ctx
, "%s_%s",
620 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
622 var
= state
->symbols
->get_variable(new_name
);
626 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
627 f
= state
->subroutine_types
[i
];
628 if (strcmp(f
->name
, var
->type
->without_array()->name
))
637 sig
= found
->matching_signature(state
, actual_parameters
,
643 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
644 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
645 const ast_expression
*array
, ast_expression
*idx
,
646 const char **function_name
, exec_list
*actual_parameters
)
648 if (array
->oper
== ast_array_index
) {
649 /* This handles arrays of arrays */
650 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
652 array
->subexpressions
[0],
653 array
->subexpressions
[1],
656 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
658 YYLTYPE index_loc
= idx
->get_location();
659 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
660 outer_array_idx
, loc
,
663 ir_variable
*sub_var
= NULL
;
664 *function_name
= array
->primary_expression
.identifier
;
666 match_subroutine_by_name(*function_name
, actual_parameters
,
669 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
670 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
675 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
681 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
682 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
685 char *str
= prototype_string(sig
->return_type
, f
->name
,
687 _mesa_glsl_error(loc
, state
, " %s", str
);
693 * Raise a "no matching function" error, listing all possible overloads the
694 * compiler considered so developers can figure out what went wrong.
697 no_matching_function_error(const char *name
,
699 exec_list
*actual_parameters
,
700 _mesa_glsl_parse_state
*state
)
702 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
704 if (state
->symbols
->get_function(name
) == NULL
705 && (!state
->uses_builtin_functions
706 || sh
->symbols
->get_function(name
) == NULL
)) {
707 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
709 char *str
= prototype_string(NULL
, name
, actual_parameters
);
710 _mesa_glsl_error(loc
, state
,
711 "no matching function for call to `%s';"
716 print_function_prototypes(state
, loc
,
717 state
->symbols
->get_function(name
));
719 if (state
->uses_builtin_functions
) {
720 print_function_prototypes(state
, loc
,
721 sh
->symbols
->get_function(name
));
727 * Perform automatic type conversion of constructor parameters
729 * This implements the rules in the "Conversion and Scalar Constructors"
730 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
733 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
735 void *ctx
= ralloc_parent(src
);
736 const unsigned a
= desired_type
->base_type
;
737 const unsigned b
= src
->type
->base_type
;
738 ir_expression
*result
= NULL
;
740 if (src
->type
->is_error())
743 assert(a
<= GLSL_TYPE_IMAGE
);
744 assert(b
<= GLSL_TYPE_IMAGE
);
753 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
755 case GLSL_TYPE_FLOAT
:
756 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
759 result
= new(ctx
) ir_expression(ir_unop_i2u
,
760 new(ctx
) ir_expression(ir_unop_b2i
,
763 case GLSL_TYPE_DOUBLE
:
764 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
766 case GLSL_TYPE_UINT64
:
767 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
769 case GLSL_TYPE_INT64
:
770 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
772 case GLSL_TYPE_SAMPLER
:
773 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
775 case GLSL_TYPE_IMAGE
:
776 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
783 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
785 case GLSL_TYPE_FLOAT
:
786 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
789 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
791 case GLSL_TYPE_DOUBLE
:
792 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
794 case GLSL_TYPE_UINT64
:
795 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
797 case GLSL_TYPE_INT64
:
798 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
802 case GLSL_TYPE_FLOAT
:
805 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
808 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
811 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
813 case GLSL_TYPE_DOUBLE
:
814 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
816 case GLSL_TYPE_UINT64
:
817 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
819 case GLSL_TYPE_INT64
:
820 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
827 result
= new(ctx
) ir_expression(ir_unop_i2b
,
828 new(ctx
) ir_expression(ir_unop_u2i
,
832 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
834 case GLSL_TYPE_FLOAT
:
835 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
837 case GLSL_TYPE_DOUBLE
:
838 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
840 case GLSL_TYPE_UINT64
:
841 result
= new(ctx
) ir_expression(ir_unop_i642b
,
842 new(ctx
) ir_expression(ir_unop_u642i64
,
845 case GLSL_TYPE_INT64
:
846 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
850 case GLSL_TYPE_DOUBLE
:
853 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
856 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
859 result
= new(ctx
) ir_expression(ir_unop_f2d
,
860 new(ctx
) ir_expression(ir_unop_b2f
,
863 case GLSL_TYPE_FLOAT
:
864 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
866 case GLSL_TYPE_UINT64
:
867 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
869 case GLSL_TYPE_INT64
:
870 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
874 case GLSL_TYPE_UINT64
:
877 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
880 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
883 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
884 new(ctx
) ir_expression(ir_unop_b2i64
,
887 case GLSL_TYPE_FLOAT
:
888 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
890 case GLSL_TYPE_DOUBLE
:
891 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
893 case GLSL_TYPE_INT64
:
894 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
898 case GLSL_TYPE_INT64
:
901 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
904 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
907 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
909 case GLSL_TYPE_FLOAT
:
910 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
912 case GLSL_TYPE_DOUBLE
:
913 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
915 case GLSL_TYPE_UINT64
:
916 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
920 case GLSL_TYPE_SAMPLER
:
924 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
928 case GLSL_TYPE_IMAGE
:
932 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
938 assert(result
!= NULL
);
939 assert(result
->type
== desired_type
);
941 /* Try constant folding; it may fold in the conversion we just added. */
942 ir_constant
*const constant
= result
->constant_expression_value();
943 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
948 * Perform automatic type and constant conversion of constructor parameters
950 * This implements the rules in the "Implicit Conversions" rules, not the
951 * "Conversion and Scalar Constructors".
953 * After attempting the implicit conversion, an attempt to convert into a
954 * constant valued expression is also done.
956 * The \c from \c ir_rvalue is converted "in place".
958 * \param from Operand that is being converted
959 * \param to Base type the operand will be converted to
960 * \param state GLSL compiler state
963 * If the attempt to convert into a constant expression succeeds, \c true is
964 * returned. Otherwise \c false is returned.
967 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
968 struct _mesa_glsl_parse_state
*state
)
970 ir_rvalue
*result
= from
;
972 if (to
!= from
->type
->base_type
) {
973 const glsl_type
*desired_type
=
974 glsl_type::get_instance(to
,
975 from
->type
->vector_elements
,
976 from
->type
->matrix_columns
);
978 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
979 /* Even though convert_component() implements the constructor
980 * conversion rules (not the implicit conversion rules), its safe
981 * to use it here because we already checked that the implicit
982 * conversion is legal.
984 result
= convert_component(from
, desired_type
);
988 ir_rvalue
*const constant
= result
->constant_expression_value();
990 if (constant
!= NULL
)
993 if (from
!= result
) {
994 from
->replace_with(result
);
998 return constant
!= NULL
;
1003 * Dereference a specific component from a scalar, vector, or matrix
1006 dereference_component(ir_rvalue
*src
, unsigned component
)
1008 void *ctx
= ralloc_parent(src
);
1009 assert(component
< src
->type
->components());
1011 /* If the source is a constant, just create a new constant instead of a
1012 * dereference of the existing constant.
1014 ir_constant
*constant
= src
->as_constant();
1016 return new(ctx
) ir_constant(constant
, component
);
1018 if (src
->type
->is_scalar()) {
1020 } else if (src
->type
->is_vector()) {
1021 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1023 assert(src
->type
->is_matrix());
1025 /* Dereference a row of the matrix, then call this function again to get
1026 * a specific element from that row.
1028 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1029 const int r
= component
% src
->type
->column_type()->vector_elements
;
1030 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1031 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1034 col
->type
= src
->type
->column_type();
1036 return dereference_component(col
, r
);
1039 assert(!"Should not get here.");
1045 process_vec_mat_constructor(exec_list
*instructions
,
1046 const glsl_type
*constructor_type
,
1047 YYLTYPE
*loc
, exec_list
*parameters
,
1048 struct _mesa_glsl_parse_state
*state
)
1052 /* The ARB_shading_language_420pack spec says:
1054 * "If an initializer is a list of initializers enclosed in curly braces,
1055 * the variable being declared must be a vector, a matrix, an array, or a
1058 * int i = { 1 }; // illegal, i is not an aggregate"
1060 if (constructor_type
->vector_elements
<= 1) {
1061 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1062 "matrices, arrays, and structs");
1063 return ir_rvalue::error_value(ctx
);
1066 exec_list actual_parameters
;
1067 const unsigned parameter_count
=
1068 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1070 if (parameter_count
== 0
1071 || (constructor_type
->is_vector() &&
1072 constructor_type
->vector_elements
!= parameter_count
)
1073 || (constructor_type
->is_matrix() &&
1074 constructor_type
->matrix_columns
!= parameter_count
)) {
1075 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1076 constructor_type
->is_vector() ? "vector" : "matrix",
1077 constructor_type
->vector_elements
);
1078 return ir_rvalue::error_value(ctx
);
1081 bool all_parameters_are_constant
= true;
1083 /* Type cast each parameter and, if possible, fold constants. */
1084 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1085 /* Apply implicit conversions (not the scalar constructor rules, see the
1086 * spec quote above!) and attempt to convert the parameter to a constant
1087 * valued expression. After doing so, track whether or not all the
1088 * parameters to the constructor are trivially constant valued
1091 all_parameters_are_constant
&=
1092 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1094 if (constructor_type
->is_matrix()) {
1095 if (ir
->type
!= constructor_type
->column_type()) {
1096 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1097 "expected: %s, found %s",
1098 constructor_type
->column_type()->name
,
1100 return ir_rvalue::error_value(ctx
);
1102 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1103 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1104 "expected: %s, found %s",
1105 constructor_type
->get_scalar_type()->name
,
1107 return ir_rvalue::error_value(ctx
);
1111 if (all_parameters_are_constant
)
1112 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1114 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1116 instructions
->push_tail(var
);
1120 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1121 ir_instruction
*assignment
= NULL
;
1123 if (var
->type
->is_matrix()) {
1125 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1126 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1128 /* use writemask rather than index for vector */
1129 assert(var
->type
->is_vector());
1131 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1132 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1133 (unsigned)(1 << i
));
1136 instructions
->push_tail(assignment
);
1141 return new(ctx
) ir_dereference_variable(var
);
1146 process_array_constructor(exec_list
*instructions
,
1147 const glsl_type
*constructor_type
,
1148 YYLTYPE
*loc
, exec_list
*parameters
,
1149 struct _mesa_glsl_parse_state
*state
)
1152 /* Array constructors come in two forms: sized and unsized. Sized array
1153 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1154 * variables. In this case the number of parameters must exactly match the
1155 * specified size of the array.
1157 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1158 * are vec4 variables. In this case the size of the array being constructed
1159 * is determined by the number of parameters.
1161 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1163 * "There must be exactly the same number of arguments as the size of
1164 * the array being constructed. If no size is present in the
1165 * constructor, then the array is explicitly sized to the number of
1166 * arguments provided. The arguments are assigned in order, starting at
1167 * element 0, to the elements of the constructed array. Each argument
1168 * must be the same type as the element type of the array, or be a type
1169 * that can be converted to the element type of the array according to
1170 * Section 4.1.10 "Implicit Conversions.""
1172 exec_list actual_parameters
;
1173 const unsigned parameter_count
=
1174 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1175 bool is_unsized_array
= constructor_type
->is_unsized_array();
1177 if ((parameter_count
== 0) ||
1178 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1179 const unsigned min_param
= is_unsized_array
1180 ? 1 : constructor_type
->length
;
1182 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1184 is_unsized_array
? "at least" : "exactly",
1185 min_param
, (min_param
<= 1) ? "" : "s");
1186 return ir_rvalue::error_value(ctx
);
1189 if (is_unsized_array
) {
1191 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1193 assert(constructor_type
!= NULL
);
1194 assert(constructor_type
->length
== parameter_count
);
1197 bool all_parameters_are_constant
= true;
1198 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1200 /* Type cast each parameter and, if possible, fold constants. */
1201 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1202 /* Apply implicit conversions (not the scalar constructor rules, see the
1203 * spec quote above!) and attempt to convert the parameter to a constant
1204 * valued expression. After doing so, track whether or not all the
1205 * parameters to the constructor are trivially constant valued
1208 all_parameters_are_constant
&=
1209 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1211 if (constructor_type
->fields
.array
->is_unsized_array()) {
1212 /* As the inner parameters of the constructor are created without
1213 * knowledge of each other we need to check to make sure unsized
1214 * parameters of unsized constructors all end up with the same size.
1216 * e.g we make sure to fail for a constructor like this:
1217 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1218 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1219 * vec4[](vec4(0.0), vec4(1.0)));
1221 if (element_type
->is_unsized_array()) {
1222 /* This is the first parameter so just get the type */
1223 element_type
= ir
->type
;
1224 } else if (element_type
!= ir
->type
) {
1225 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1226 "expected: %s, found %s",
1229 return ir_rvalue::error_value(ctx
);
1231 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1232 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1233 "expected: %s, found %s",
1234 constructor_type
->fields
.array
->name
,
1236 return ir_rvalue::error_value(ctx
);
1238 element_type
= ir
->type
;
1242 if (constructor_type
->fields
.array
->is_unsized_array()) {
1244 glsl_type::get_array_instance(element_type
,
1246 assert(constructor_type
!= NULL
);
1247 assert(constructor_type
->length
== parameter_count
);
1250 if (all_parameters_are_constant
)
1251 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1253 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1255 instructions
->push_tail(var
);
1258 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1259 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1260 new(ctx
) ir_constant(i
));
1262 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1263 instructions
->push_tail(assignment
);
1268 return new(ctx
) ir_dereference_variable(var
);
1273 * Determine if a list consists of a single scalar r-value
1276 single_scalar_parameter(exec_list
*parameters
)
1278 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1279 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1281 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1286 * Generate inline code for a vector constructor
1288 * The generated constructor code will consist of a temporary variable
1289 * declaration of the same type as the constructor. A sequence of assignments
1290 * from constructor parameters to the temporary will follow.
1293 * An \c ir_dereference_variable of the temprorary generated in the constructor
1297 emit_inline_vector_constructor(const glsl_type
*type
,
1298 exec_list
*instructions
,
1299 exec_list
*parameters
,
1302 assert(!parameters
->is_empty());
1304 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1305 instructions
->push_tail(var
);
1307 /* There are three kinds of vector constructors.
1309 * - Construct a vector from a single scalar by replicating that scalar to
1310 * all components of the vector.
1312 * - Construct a vector from at least a matrix. This case should already
1313 * have been taken care of in ast_function_expression::hir by breaking
1314 * down the matrix into a series of column vectors.
1316 * - Construct a vector from an arbirary combination of vectors and
1317 * scalars. The components of the constructor parameters are assigned
1318 * to the vector in order until the vector is full.
1320 const unsigned lhs_components
= type
->components();
1321 if (single_scalar_parameter(parameters
)) {
1322 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1323 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1325 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1326 const unsigned mask
= (1U << lhs_components
) - 1;
1328 assert(rhs
->type
== lhs
->type
);
1330 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1331 instructions
->push_tail(inst
);
1333 unsigned base_component
= 0;
1334 unsigned base_lhs_component
= 0;
1335 ir_constant_data data
;
1336 unsigned constant_mask
= 0, constant_components
= 0;
1338 memset(&data
, 0, sizeof(data
));
1340 foreach_in_list(ir_rvalue
, param
, parameters
) {
1341 unsigned rhs_components
= param
->type
->components();
1343 /* Do not try to assign more components to the vector than it has! */
1344 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1345 rhs_components
= lhs_components
- base_lhs_component
;
1348 const ir_constant
*const c
= param
->as_constant();
1350 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1351 switch (c
->type
->base_type
) {
1352 case GLSL_TYPE_UINT
:
1353 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1356 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1358 case GLSL_TYPE_FLOAT
:
1359 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1361 case GLSL_TYPE_DOUBLE
:
1362 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1364 case GLSL_TYPE_BOOL
:
1365 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1367 case GLSL_TYPE_UINT64
:
1368 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1370 case GLSL_TYPE_INT64
:
1371 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1374 assert(!"Should not get here.");
1379 /* Mask of fields to be written in the assignment. */
1380 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1381 constant_components
+= rhs_components
;
1383 base_component
+= rhs_components
;
1385 /* Advance the component index by the number of components
1386 * that were just assigned.
1388 base_lhs_component
+= rhs_components
;
1391 if (constant_mask
!= 0) {
1392 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1393 const glsl_type
*rhs_type
=
1394 glsl_type::get_instance(var
->type
->base_type
,
1395 constant_components
,
1397 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1399 ir_instruction
*inst
=
1400 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1401 instructions
->push_tail(inst
);
1405 foreach_in_list(ir_rvalue
, param
, parameters
) {
1406 unsigned rhs_components
= param
->type
->components();
1408 /* Do not try to assign more components to the vector than it has! */
1409 if ((rhs_components
+ base_component
) > lhs_components
) {
1410 rhs_components
= lhs_components
- base_component
;
1413 /* If we do not have any components left to copy, break out of the
1414 * loop. This can happen when initializing a vec4 with a mat3 as the
1415 * mat3 would have been broken into a series of column vectors.
1417 if (rhs_components
== 0) {
1421 const ir_constant
*const c
= param
->as_constant();
1423 /* Mask of fields to be written in the assignment. */
1424 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1427 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1429 /* Generate a swizzle so that LHS and RHS sizes match. */
1431 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1433 ir_instruction
*inst
=
1434 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1435 instructions
->push_tail(inst
);
1438 /* Advance the component index by the number of components that were
1441 base_component
+= rhs_components
;
1444 return new(ctx
) ir_dereference_variable(var
);
1449 * Generate assignment of a portion of a vector to a portion of a matrix column
1451 * \param src_base First component of the source to be used in assignment
1452 * \param column Column of destination to be assiged
1453 * \param row_base First component of the destination column to be assigned
1454 * \param count Number of components to be assigned
1457 * \c src_base + \c count must be less than or equal to the number of
1458 * components in the source vector.
1461 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1462 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1465 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1466 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1469 assert(column_ref
->type
->components() >= (row_base
+ count
));
1470 assert(src
->type
->components() >= (src_base
+ count
));
1472 /* Generate a swizzle that extracts the number of components from the source
1473 * that are to be assigned to the column of the matrix.
1475 if (count
< src
->type
->vector_elements
) {
1476 src
= new(mem_ctx
) ir_swizzle(src
,
1477 src_base
+ 0, src_base
+ 1,
1478 src_base
+ 2, src_base
+ 3,
1482 /* Mask of fields to be written in the assignment. */
1483 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1485 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1490 * Generate inline code for a matrix constructor
1492 * The generated constructor code will consist of a temporary variable
1493 * declaration of the same type as the constructor. A sequence of assignments
1494 * from constructor parameters to the temporary will follow.
1497 * An \c ir_dereference_variable of the temprorary generated in the constructor
1501 emit_inline_matrix_constructor(const glsl_type
*type
,
1502 exec_list
*instructions
,
1503 exec_list
*parameters
,
1506 assert(!parameters
->is_empty());
1508 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1509 instructions
->push_tail(var
);
1511 /* There are three kinds of matrix constructors.
1513 * - Construct a matrix from a single scalar by replicating that scalar to
1514 * along the diagonal of the matrix and setting all other components to
1517 * - Construct a matrix from an arbirary combination of vectors and
1518 * scalars. The components of the constructor parameters are assigned
1519 * to the matrix in column-major order until the matrix is full.
1521 * - Construct a matrix from a single matrix. The source matrix is copied
1522 * to the upper left portion of the constructed matrix, and the remaining
1523 * elements take values from the identity matrix.
1525 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1526 if (single_scalar_parameter(parameters
)) {
1527 /* Assign the scalar to the X component of a vec4, and fill the remaining
1528 * components with zero.
1530 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1531 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1532 ir_variable
*rhs_var
=
1533 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1536 instructions
->push_tail(rhs_var
);
1538 ir_constant_data zero
;
1539 for (unsigned i
= 0; i
< 4; i
++)
1540 if (first_param
->type
->is_float())
1545 ir_instruction
*inst
=
1546 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1547 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1549 instructions
->push_tail(inst
);
1551 ir_dereference
*const rhs_ref
=
1552 new(ctx
) ir_dereference_variable(rhs_var
);
1554 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1555 instructions
->push_tail(inst
);
1557 /* Assign the temporary vector to each column of the destination matrix
1558 * with a swizzle that puts the X component on the diagonal of the
1559 * matrix. In some cases this may mean that the X component does not
1560 * get assigned into the column at all (i.e., when the matrix has more
1561 * columns than rows).
1563 static const unsigned rhs_swiz
[4][4] = {
1570 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1571 type
->vector_elements
);
1572 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1573 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1574 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1577 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1578 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1579 type
->vector_elements
);
1581 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1582 instructions
->push_tail(inst
);
1585 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1586 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1587 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1590 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1591 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1592 type
->vector_elements
);
1594 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1595 instructions
->push_tail(inst
);
1597 } else if (first_param
->type
->is_matrix()) {
1598 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1600 * "If a matrix is constructed from a matrix, then each component
1601 * (column i, row j) in the result that has a corresponding
1602 * component (column i, row j) in the argument will be initialized
1603 * from there. All other components will be initialized to the
1604 * identity matrix. If a matrix argument is given to a matrix
1605 * constructor, it is an error to have any other arguments."
1607 assert(first_param
->next
->is_tail_sentinel());
1608 ir_rvalue
*const src_matrix
= first_param
;
1610 /* If the source matrix is smaller, pre-initialize the relavent parts of
1611 * the destination matrix to the identity matrix.
1613 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1614 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1616 /* If the source matrix has fewer rows, every column of the
1617 * destination must be initialized. Otherwise only the columns in
1618 * the destination that do not exist in the source must be
1622 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1623 ? 0 : src_matrix
->type
->matrix_columns
;
1625 const glsl_type
*const col_type
= var
->type
->column_type();
1626 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1627 ir_constant_data ident
;
1629 if (!col_type
->is_double()) {
1634 ident
.f
[col
] = 1.0f
;
1643 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1645 ir_rvalue
*const lhs
=
1646 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1648 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1649 instructions
->push_tail(inst
);
1653 /* Assign columns from the source matrix to the destination matrix.
1655 * Since the parameter will be used in the RHS of multiple assignments,
1656 * generate a temporary and copy the paramter there.
1658 ir_variable
*const rhs_var
=
1659 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1661 instructions
->push_tail(rhs_var
);
1663 ir_dereference
*const rhs_var_ref
=
1664 new(ctx
) ir_dereference_variable(rhs_var
);
1665 ir_instruction
*const inst
=
1666 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1667 instructions
->push_tail(inst
);
1669 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1670 var
->type
->vector_elements
);
1671 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1672 var
->type
->matrix_columns
);
1674 unsigned swiz
[4] = { 0, 0, 0, 0 };
1675 for (unsigned i
= 1; i
< last_row
; i
++)
1678 const unsigned write_mask
= (1U << last_row
) - 1;
1680 for (unsigned i
= 0; i
< last_col
; i
++) {
1681 ir_dereference
*const lhs
=
1682 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1683 ir_rvalue
*const rhs_col
=
1684 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1686 /* If one matrix has columns that are smaller than the columns of the
1687 * other matrix, wrap the column access of the larger with a swizzle
1688 * so that the LHS and RHS of the assignment have the same size (and
1689 * therefore have the same type).
1691 * It would be perfectly valid to unconditionally generate the
1692 * swizzles, this this will typically result in a more compact IR
1696 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1697 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1702 ir_instruction
*inst
=
1703 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1704 instructions
->push_tail(inst
);
1707 const unsigned cols
= type
->matrix_columns
;
1708 const unsigned rows
= type
->vector_elements
;
1709 unsigned remaining_slots
= rows
* cols
;
1710 unsigned col_idx
= 0;
1711 unsigned row_idx
= 0;
1713 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1714 unsigned rhs_components
= rhs
->type
->components();
1715 unsigned rhs_base
= 0;
1717 if (remaining_slots
== 0)
1720 /* Since the parameter might be used in the RHS of two assignments,
1721 * generate a temporary and copy the paramter there.
1723 ir_variable
*rhs_var
=
1724 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1725 instructions
->push_tail(rhs_var
);
1727 ir_dereference
*rhs_var_ref
=
1728 new(ctx
) ir_dereference_variable(rhs_var
);
1729 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1730 instructions
->push_tail(inst
);
1733 /* Assign the current parameter to as many components of the matrix
1736 * NOTE: A single vector parameter can span two matrix columns. A
1737 * single vec4, for example, can completely fill a mat2.
1739 unsigned count
= MIN2(rows
- row_idx
,
1740 rhs_components
- rhs_base
);
1742 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1743 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1748 instructions
->push_tail(inst
);
1751 remaining_slots
-= count
;
1753 /* Sometimes, there is still data left in the parameters and
1754 * components left to be set in the destination but in other
1757 if (row_idx
>= rows
) {
1761 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1765 return new(ctx
) ir_dereference_variable(var
);
1770 emit_inline_record_constructor(const glsl_type
*type
,
1771 exec_list
*instructions
,
1772 exec_list
*parameters
,
1775 ir_variable
*const var
=
1776 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1777 ir_dereference_variable
*const d
=
1778 new(mem_ctx
) ir_dereference_variable(var
);
1780 instructions
->push_tail(var
);
1782 exec_node
*node
= parameters
->get_head_raw();
1783 for (unsigned i
= 0; i
< type
->length
; i
++) {
1784 assert(!node
->is_tail_sentinel());
1786 ir_dereference
*const lhs
=
1787 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1788 type
->fields
.structure
[i
].name
);
1790 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1791 assert(rhs
!= NULL
);
1793 ir_instruction
*const assign
=
1794 new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1796 instructions
->push_tail(assign
);
1805 process_record_constructor(exec_list
*instructions
,
1806 const glsl_type
*constructor_type
,
1807 YYLTYPE
*loc
, exec_list
*parameters
,
1808 struct _mesa_glsl_parse_state
*state
)
1811 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1813 * "The arguments to the constructor will be used to set the structure's
1814 * fields, in order, using one argument per field. Each argument must
1815 * be the same type as the field it sets, or be a type that can be
1816 * converted to the field's type according to Section 4.1.10 “Implicit
1819 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1821 * "In all cases, the innermost initializer (i.e., not a list of
1822 * initializers enclosed in curly braces) applied to an object must
1823 * have the same type as the object being initialized or be a type that
1824 * can be converted to the object's type according to section 4.1.10
1825 * "Implicit Conversions". In the latter case, an implicit conversion
1826 * will be done on the initializer before the assignment is done."
1828 exec_list actual_parameters
;
1830 const unsigned parameter_count
=
1831 process_parameters(instructions
, &actual_parameters
, parameters
,
1834 if (parameter_count
!= constructor_type
->length
) {
1835 _mesa_glsl_error(loc
, state
,
1836 "%s parameters in constructor for `%s'",
1837 parameter_count
> constructor_type
->length
1838 ? "too many": "insufficient",
1839 constructor_type
->name
);
1840 return ir_rvalue::error_value(ctx
);
1843 bool all_parameters_are_constant
= true;
1846 /* Type cast each parameter and, if possible, fold constants. */
1847 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1849 const glsl_struct_field
*struct_field
=
1850 &constructor_type
->fields
.structure
[i
];
1852 /* Apply implicit conversions (not the scalar constructor rules, see the
1853 * spec quote above!) and attempt to convert the parameter to a constant
1854 * valued expression. After doing so, track whether or not all the
1855 * parameters to the constructor are trivially constant valued
1858 all_parameters_are_constant
&=
1859 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1862 if (ir
->type
!= struct_field
->type
) {
1863 _mesa_glsl_error(loc
, state
,
1864 "parameter type mismatch in constructor for `%s.%s' "
1866 constructor_type
->name
,
1869 struct_field
->type
->name
);
1870 return ir_rvalue::error_value(ctx
);
1876 if (all_parameters_are_constant
) {
1877 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1879 return emit_inline_record_constructor(constructor_type
, instructions
,
1880 &actual_parameters
, state
);
1885 ast_function_expression::handle_method(exec_list
*instructions
,
1886 struct _mesa_glsl_parse_state
*state
)
1888 const ast_expression
*field
= subexpressions
[0];
1892 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1893 YYLTYPE loc
= get_location();
1894 state
->check_version(120, 300, &loc
, "methods not supported");
1897 method
= field
->primary_expression
.identifier
;
1899 /* This would prevent to raise "uninitialized variable" warnings when
1900 * calling array.length.
1902 field
->subexpressions
[0]->set_is_lhs(true);
1903 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1904 if (strcmp(method
, "length") == 0) {
1905 if (!this->expressions
.is_empty()) {
1906 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1910 if (op
->type
->is_array()) {
1911 if (op
->type
->is_unsized_array()) {
1912 if (!state
->has_shader_storage_buffer_objects()) {
1913 _mesa_glsl_error(&loc
, state
,
1914 "length called on unsized array"
1915 " only available with"
1916 " ARB_shader_storage_buffer_object");
1918 /* Calculate length of an unsized array in run-time */
1919 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
1922 result
= new(ctx
) ir_constant(op
->type
->array_size());
1924 } else if (op
->type
->is_vector()) {
1925 if (state
->has_420pack()) {
1926 /* .length() returns int. */
1927 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1929 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1930 " available with ARB_shading_language_420pack");
1933 } else if (op
->type
->is_matrix()) {
1934 if (state
->has_420pack()) {
1935 /* .length() returns int. */
1936 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1938 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1939 " available with ARB_shading_language_420pack");
1943 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1947 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1952 return ir_rvalue::error_value(ctx
);
1955 static inline bool is_valid_constructor(const glsl_type
*type
,
1956 struct _mesa_glsl_parse_state
*state
)
1958 return type
->is_numeric() || type
->is_boolean() ||
1959 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
1963 ast_function_expression::hir(exec_list
*instructions
,
1964 struct _mesa_glsl_parse_state
*state
)
1967 /* There are three sorts of function calls.
1969 * 1. constructors - The first subexpression is an ast_type_specifier.
1970 * 2. methods - Only the .length() method of array types.
1971 * 3. functions - Calls to regular old functions.
1974 if (is_constructor()) {
1975 const ast_type_specifier
*type
=
1976 (ast_type_specifier
*) subexpressions
[0];
1977 YYLTYPE loc
= type
->get_location();
1980 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1982 /* constructor_type can be NULL if a variable with the same name as the
1983 * structure has come into scope.
1985 if (constructor_type
== NULL
) {
1986 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1987 "may be shadowed by a variable with the same name)",
1989 return ir_rvalue::error_value(ctx
);
1993 /* Constructors for opaque types are illegal.
1995 * From section 4.1.7 of the ARB_bindless_texture spec:
1997 * "Samplers are represented using 64-bit integer handles, and may be "
1998 * converted to and from 64-bit integers using constructors."
2000 * From section 4.1.X of the ARB_bindless_texture spec:
2002 * "Images are represented using 64-bit integer handles, and may be
2003 * converted to and from 64-bit integers using constructors."
2005 if (constructor_type
->contains_atomic() ||
2006 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2007 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2008 state
->has_bindless() ? "atomic" : "opaque",
2009 constructor_type
->name
);
2010 return ir_rvalue::error_value(ctx
);
2013 if (constructor_type
->is_subroutine()) {
2014 _mesa_glsl_error(& loc
, state
,
2015 "subroutine name cannot be a constructor `%s'",
2016 constructor_type
->name
);
2017 return ir_rvalue::error_value(ctx
);
2020 if (constructor_type
->is_array()) {
2021 if (!state
->check_version(120, 300, &loc
,
2022 "array constructors forbidden")) {
2023 return ir_rvalue::error_value(ctx
);
2026 return process_array_constructor(instructions
, constructor_type
,
2027 & loc
, &this->expressions
, state
);
2031 /* There are two kinds of constructor calls. Constructors for arrays and
2032 * structures must have the exact number of arguments with matching types
2033 * in the correct order. These constructors follow essentially the same
2034 * type matching rules as functions.
2036 * Constructors for built-in language types, such as mat4 and vec2, are
2037 * free form. The only requirements are that the parameters must provide
2038 * enough values of the correct scalar type and that no arguments are
2039 * given past the last used argument.
2041 * When using the C-style initializer syntax from GLSL 4.20, constructors
2042 * must have the exact number of arguments with matching types in the
2045 if (constructor_type
->is_record()) {
2046 return process_record_constructor(instructions
, constructor_type
,
2047 &loc
, &this->expressions
,
2051 if (!is_valid_constructor(constructor_type
, state
))
2052 return ir_rvalue::error_value(ctx
);
2054 /* Total number of components of the type being constructed. */
2055 const unsigned type_components
= constructor_type
->components();
2057 /* Number of components from parameters that have actually been
2058 * consumed. This is used to perform several kinds of error checking.
2060 unsigned components_used
= 0;
2062 unsigned matrix_parameters
= 0;
2063 unsigned nonmatrix_parameters
= 0;
2064 exec_list actual_parameters
;
2066 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2067 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2069 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2071 * "It is an error to provide extra arguments beyond this
2072 * last used argument."
2074 if (components_used
>= type_components
) {
2075 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2077 constructor_type
->name
);
2078 return ir_rvalue::error_value(ctx
);
2081 if (!is_valid_constructor(result
->type
, state
)) {
2082 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2083 "non-numeric data type",
2084 constructor_type
->name
);
2085 return ir_rvalue::error_value(ctx
);
2088 /* Count the number of matrix and nonmatrix parameters. This
2089 * is used below to enforce some of the constructor rules.
2091 if (result
->type
->is_matrix())
2092 matrix_parameters
++;
2094 nonmatrix_parameters
++;
2096 actual_parameters
.push_tail(result
);
2097 components_used
+= result
->type
->components();
2100 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2102 * "It is an error to construct matrices from other matrices. This
2103 * is reserved for future use."
2105 if (matrix_parameters
> 0
2106 && constructor_type
->is_matrix()
2107 && !state
->check_version(120, 100, &loc
,
2108 "cannot construct `%s' from a matrix",
2109 constructor_type
->name
)) {
2110 return ir_rvalue::error_value(ctx
);
2113 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2115 * "If a matrix argument is given to a matrix constructor, it is
2116 * an error to have any other arguments."
2118 if ((matrix_parameters
> 0)
2119 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2120 && constructor_type
->is_matrix()) {
2121 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2122 "matrix must be only parameter",
2123 constructor_type
->name
);
2124 return ir_rvalue::error_value(ctx
);
2127 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2129 * "In these cases, there must be enough components provided in the
2130 * arguments to provide an initializer for every component in the
2131 * constructed value."
2133 if (components_used
< type_components
&& components_used
!= 1
2134 && matrix_parameters
== 0) {
2135 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2137 constructor_type
->name
);
2138 return ir_rvalue::error_value(ctx
);
2141 /* Matrices can never be consumed as is by any constructor but matrix
2142 * constructors. If the constructor type is not matrix, always break the
2143 * matrix up into a series of column vectors.
2145 if (!constructor_type
->is_matrix()) {
2146 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2147 if (!matrix
->type
->is_matrix())
2150 /* Create a temporary containing the matrix. */
2151 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2153 instructions
->push_tail(var
);
2154 instructions
->push_tail(
2155 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2157 var
->constant_value
= matrix
->constant_expression_value();
2159 /* Replace the matrix with dereferences of its columns. */
2160 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2161 matrix
->insert_before(
2162 new (ctx
) ir_dereference_array(var
,
2163 new(ctx
) ir_constant(i
)));
2169 bool all_parameters_are_constant
= true;
2171 /* Type cast each parameter and, if possible, fold constants.*/
2172 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2173 const glsl_type
*desired_type
;
2175 /* From section 5.4.1 of the ARB_bindless_texture spec:
2177 * "In the following four constructors, the low 32 bits of the sampler
2178 * type correspond to the .x component of the uvec2 and the high 32
2179 * bits correspond to the .y component."
2181 * uvec2(any sampler type) // Converts a sampler type to a
2182 * // pair of 32-bit unsigned integers
2183 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2185 * uvec2(any image type) // Converts an image type to a
2186 * // pair of 32-bit unsigned integers
2187 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2190 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2191 /* Convert a sampler/image type to a pair of 32-bit unsigned
2192 * integers as defined by ARB_bindless_texture.
2194 if (constructor_type
!= glsl_type::uvec2_type
) {
2195 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2196 "be converted to a pair of 32-bit unsigned "
2199 desired_type
= glsl_type::uvec2_type
;
2200 } else if (constructor_type
->is_sampler() ||
2201 constructor_type
->is_image()) {
2202 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2203 * type as defined by ARB_bindless_texture.
2205 if (ir
->type
!= glsl_type::uvec2_type
) {
2206 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2207 "be converted from a pair of 32-bit unsigned "
2210 desired_type
= constructor_type
;
2213 glsl_type::get_instance(constructor_type
->base_type
,
2214 ir
->type
->vector_elements
,
2215 ir
->type
->matrix_columns
);
2218 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2220 /* Attempt to convert the parameter to a constant valued expression.
2221 * After doing so, track whether or not all the parameters to the
2222 * constructor are trivially constant valued expressions.
2224 ir_rvalue
*const constant
= result
->constant_expression_value();
2226 if (constant
!= NULL
)
2229 all_parameters_are_constant
= false;
2232 ir
->replace_with(result
);
2236 /* If all of the parameters are trivially constant, create a
2237 * constant representing the complete collection of parameters.
2239 if (all_parameters_are_constant
) {
2240 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2241 } else if (constructor_type
->is_scalar()) {
2242 return dereference_component((ir_rvalue
*)
2243 actual_parameters
.get_head_raw(),
2245 } else if (constructor_type
->is_vector()) {
2246 return emit_inline_vector_constructor(constructor_type
,
2251 assert(constructor_type
->is_matrix());
2252 return emit_inline_matrix_constructor(constructor_type
,
2257 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2258 return handle_method(instructions
, state
);
2260 const ast_expression
*id
= subexpressions
[0];
2261 const char *func_name
= NULL
;
2262 YYLTYPE loc
= get_location();
2263 exec_list actual_parameters
;
2264 ir_variable
*sub_var
= NULL
;
2265 ir_rvalue
*array_idx
= NULL
;
2267 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2270 if (id
->oper
== ast_array_index
) {
2271 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2272 id
->subexpressions
[0],
2273 id
->subexpressions
[1], &func_name
,
2274 &actual_parameters
);
2275 } else if (id
->oper
== ast_identifier
) {
2276 func_name
= id
->primary_expression
.identifier
;
2278 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2281 /* an error was emitted earlier */
2283 return ir_rvalue::error_value(ctx
);
2285 ir_function_signature
*sig
=
2286 match_function_by_name(func_name
, &actual_parameters
, state
);
2288 ir_rvalue
*value
= NULL
;
2290 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2295 no_matching_function_error(func_name
, &loc
,
2296 &actual_parameters
, state
);
2297 value
= ir_rvalue::error_value(ctx
);
2298 } else if (!verify_parameter_modes(state
, sig
,
2300 this->expressions
)) {
2301 /* an error has already been emitted */
2302 value
= ir_rvalue::error_value(ctx
);
2303 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2304 /* ftransform refers to global variables, and we don't have any code
2305 * for remapping the variable references in the built-in shader.
2308 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2309 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2310 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2311 new(ctx
) ir_dereference_variable(mvp
),
2312 new(ctx
) ir_dereference_variable(vtx
));
2314 if (state
->stage
== MESA_SHADER_TESS_CTRL
&&
2315 sig
->is_builtin() && strcmp(func_name
, "barrier") == 0) {
2316 if (state
->current_function
== NULL
||
2317 strcmp(state
->current_function
->function_name(), "main") != 0) {
2318 _mesa_glsl_error(&loc
, state
,
2319 "barrier() may only be used in main()");
2322 if (state
->found_return
) {
2323 _mesa_glsl_error(&loc
, state
,
2324 "barrier() may not be used after return");
2327 if (instructions
!= &state
->current_function
->body
) {
2328 _mesa_glsl_error(&loc
, state
,
2329 "barrier() may not be used in control flow");
2333 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2334 array_idx
, state
, sig
->is_builtin());
2336 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2339 instructions
->push_tail(tmp
);
2340 value
= new(ctx
) ir_dereference_variable(tmp
);
2347 unreachable("not reached");
2351 ast_function_expression::has_sequence_subexpression() const
2353 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2354 if (ast
->has_sequence_subexpression())
2362 ast_aggregate_initializer::hir(exec_list
*instructions
,
2363 struct _mesa_glsl_parse_state
*state
)
2366 YYLTYPE loc
= this->get_location();
2368 if (!this->constructor_type
) {
2369 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2370 return ir_rvalue::error_value(ctx
);
2372 const glsl_type
*const constructor_type
= this->constructor_type
;
2374 if (!state
->has_420pack()) {
2375 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2376 "GL_ARB_shading_language_420pack extension");
2377 return ir_rvalue::error_value(ctx
);
2380 if (constructor_type
->is_array()) {
2381 return process_array_constructor(instructions
, constructor_type
, &loc
,
2382 &this->expressions
, state
);
2385 if (constructor_type
->is_record()) {
2386 return process_record_constructor(instructions
, constructor_type
, &loc
,
2387 &this->expressions
, state
);
2390 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2391 &this->expressions
, state
);