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
)
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
;
230 while (val
->ir_type
== ir_type_dereference_array
) {
231 val
= ((ir_dereference_array
*)val
)->array
;
234 if (!val
->as_dereference_variable() ||
235 val
->variable_referenced()->data
.mode
!= ir_var_shader_in
) {
236 _mesa_glsl_error(&loc
, state
,
237 "parameter `%s` must be a shader input",
242 val
->variable_referenced()->data
.must_be_shader_input
= 1;
245 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
246 if (formal
->data
.mode
== ir_var_function_out
247 || formal
->data
.mode
== ir_var_function_inout
) {
248 const char *mode
= NULL
;
249 switch (formal
->data
.mode
) {
250 case ir_var_function_out
: mode
= "out"; break;
251 case ir_var_function_inout
: mode
= "inout"; break;
252 default: assert(false); break;
255 /* This AST-based check catches errors like f(i++). The IR-based
256 * is_lvalue() is insufficient because the actual parameter at the
257 * IR-level is just a temporary value, which is an l-value.
259 if (actual_ast
->non_lvalue_description
!= NULL
) {
260 _mesa_glsl_error(&loc
, state
,
261 "function parameter '%s %s' references a %s",
263 actual_ast
->non_lvalue_description
);
267 ir_variable
*var
= actual
->variable_referenced();
269 if (var
&& formal
->data
.mode
== ir_var_function_inout
) {
270 if ((var
->data
.mode
== ir_var_auto
||
271 var
->data
.mode
== ir_var_shader_out
) &&
272 !var
->data
.assigned
&&
273 !is_gl_identifier(var
->name
)) {
274 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
280 var
->data
.assigned
= true;
282 if (var
&& var
->data
.read_only
) {
283 _mesa_glsl_error(&loc
, state
,
284 "function parameter '%s %s' references the "
285 "read-only variable '%s'",
287 actual
->variable_referenced()->name
);
289 } else if (!actual
->is_lvalue(state
)) {
290 _mesa_glsl_error(&loc
, state
,
291 "function parameter '%s %s' is not an lvalue",
296 assert(formal
->data
.mode
== ir_var_function_in
||
297 formal
->data
.mode
== ir_var_const_in
);
298 ir_variable
*var
= actual
->variable_referenced();
300 if ((var
->data
.mode
== ir_var_auto
||
301 var
->data
.mode
== ir_var_shader_out
) &&
302 !var
->data
.assigned
&&
303 !is_gl_identifier(var
->name
)) {
304 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
310 if (formal
->type
->is_image() &&
311 actual
->variable_referenced()) {
312 if (!verify_image_parameter(&loc
, state
, formal
,
313 actual
->variable_referenced()))
317 actual_ir_node
= actual_ir_node
->next
;
318 actual_ast_node
= actual_ast_node
->next
;
321 /* The first parameter of atomic functions must be a buffer variable */
322 const char *func_name
= sig
->function_name();
323 bool is_atomic
= is_atomic_function(func_name
);
325 const ir_rvalue
*const actual
=
326 (ir_rvalue
*) actual_ir_parameters
.get_head_raw();
328 const ast_expression
*const actual_ast
=
329 exec_node_data(ast_expression
,
330 actual_ast_parameters
.get_head_raw(), link
);
331 YYLTYPE loc
= actual_ast
->get_location();
333 if (!verify_first_atomic_parameter(&loc
, state
,
334 actual
->variable_referenced())) {
343 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
344 exec_list
*before_instructions
, exec_list
*after_instructions
,
345 bool parameter_is_inout
)
347 ir_expression
*const expr
= actual
->as_expression();
349 /* If the types match exactly and the parameter is not a vector-extract,
350 * nothing needs to be done to fix the parameter.
352 if (formal_type
== actual
->type
353 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
356 /* To convert an out parameter, we need to create a temporary variable to
357 * hold the value before conversion, and then perform the conversion after
358 * the function call returns.
360 * This has the effect of transforming code like this:
366 * Into IR that's equivalent to this:
370 * int out_parameter_conversion;
371 * f(out_parameter_conversion);
372 * value = float(out_parameter_conversion);
374 * If the parameter is an ir_expression of ir_binop_vector_extract,
375 * additional conversion is needed in the post-call re-write.
378 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
380 before_instructions
->push_tail(tmp
);
382 /* If the parameter is an inout parameter, copy the value of the actual
383 * parameter to the new temporary. Note that no type conversion is allowed
384 * here because inout parameters must match types exactly.
386 if (parameter_is_inout
) {
387 /* Inout parameters should never require conversion, since that would
388 * require an implicit conversion to exist both to and from the formal
389 * parameter type, and there are no bidirectional implicit conversions.
391 assert (actual
->type
== formal_type
);
393 ir_dereference_variable
*const deref_tmp_1
=
394 new(mem_ctx
) ir_dereference_variable(tmp
);
395 ir_assignment
*const assignment
=
396 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
397 before_instructions
->push_tail(assignment
);
400 /* Replace the parameter in the call with a dereference of the new
403 ir_dereference_variable
*const deref_tmp_2
=
404 new(mem_ctx
) ir_dereference_variable(tmp
);
405 actual
->replace_with(deref_tmp_2
);
408 /* Copy the temporary variable to the actual parameter with optional
409 * type conversion applied.
411 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
412 if (actual
->type
!= formal_type
)
413 rhs
= convert_component(rhs
, actual
->type
);
415 ir_rvalue
*lhs
= actual
;
416 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
417 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
,
419 expr
->operands
[1]->clone(mem_ctx
,
423 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
424 after_instructions
->push_tail(assignment_2
);
428 * Generate a function call.
430 * For non-void functions, this returns a dereference of the temporary
431 * variable which stores the return value for the call. For void functions,
435 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
436 exec_list
*actual_parameters
,
437 ir_variable
*sub_var
,
438 ir_rvalue
*array_idx
,
439 struct _mesa_glsl_parse_state
*state
)
442 exec_list post_call_conversions
;
444 /* Perform implicit conversion of arguments. For out parameters, we need
445 * to place them in a temporary variable and do the conversion after the
446 * call takes place. Since we haven't emitted the call yet, we'll place
447 * the post-call conversions in a temporary exec_list, and emit them later.
449 foreach_two_lists(formal_node
, &sig
->parameters
,
450 actual_node
, actual_parameters
) {
451 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
452 ir_variable
*formal
= (ir_variable
*) formal_node
;
454 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
455 switch (formal
->data
.mode
) {
456 case ir_var_const_in
:
457 case ir_var_function_in
: {
459 = convert_component(actual
, formal
->type
);
460 actual
->replace_with(converted
);
463 case ir_var_function_out
:
464 case ir_var_function_inout
:
465 fix_parameter(ctx
, actual
, formal
->type
,
466 instructions
, &post_call_conversions
,
467 formal
->data
.mode
== ir_var_function_inout
);
470 assert (!"Illegal formal parameter mode");
476 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
478 * "Initializers for const declarations must be formed from literal
479 * values, other const variables (not including function call
480 * paramaters), or expressions of these.
482 * Constructors may be used in such expressions, but function calls may
485 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
487 * "A constant expression is one of
491 * - a built-in function call whose arguments are all constant
492 * expressions, with the exception of the texture lookup
493 * functions, the noise functions, and ftransform. The built-in
494 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
495 * inside an initializer with an argument that is a constant
498 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
500 * "A constant expression is one of
504 * - a built-in function call whose arguments are all constant
505 * expressions, with the exception of the texture lookup
508 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
510 * "A constant expression is one of
514 * - a built-in function call whose arguments are all constant
515 * expressions, with the exception of the texture lookup
516 * functions. The built-in functions dFdx, dFdy, and fwidth must
517 * return 0 when evaluated inside an initializer with an argument
518 * that is a constant expression."
520 * If the function call is a constant expression, don't generate any
521 * instructions; just generate an ir_constant.
523 if (state
->is_version(120, 100)) {
524 ir_constant
*value
= sig
->constant_expression_value(ctx
,
532 ir_dereference_variable
*deref
= NULL
;
533 if (!sig
->return_type
->is_void()) {
534 /* Create a new temporary to hold the return value. */
535 char *const name
= ir_variable::temporaries_allocate_names
536 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
541 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
542 instructions
->push_tail(var
);
546 deref
= new(ctx
) ir_dereference_variable(var
);
549 ir_call
*call
= new(ctx
) ir_call(sig
, deref
,
550 actual_parameters
, sub_var
, array_idx
);
551 instructions
->push_tail(call
);
552 if (sig
->is_builtin()) {
553 /* inline immediately */
554 call
->generate_inline(call
);
558 /* Also emit any necessary out-parameter conversions. */
559 instructions
->append_list(&post_call_conversions
);
561 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
565 * Given a function name and parameter list, find the matching signature.
567 static ir_function_signature
*
568 match_function_by_name(const char *name
,
569 exec_list
*actual_parameters
,
570 struct _mesa_glsl_parse_state
*state
)
572 ir_function
*f
= state
->symbols
->get_function(name
);
573 ir_function_signature
*local_sig
= NULL
;
574 ir_function_signature
*sig
= NULL
;
576 /* Is the function hidden by a record type constructor? */
577 if (state
->symbols
->get_type(name
))
578 return sig
; /* no match */
580 /* Is the function hidden by a variable (impossible in 1.10)? */
581 if (!state
->symbols
->separate_function_namespace
582 && state
->symbols
->get_variable(name
))
583 return sig
; /* no match */
586 /* In desktop GL, the presence of a user-defined signature hides any
587 * built-in signatures, so we must ignore them. In contrast, in ES2
588 * user-defined signatures add new overloads, so we must consider them.
590 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
592 /* Look for a match in the local shader. If exact, we're done. */
593 bool is_exact
= false;
594 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
595 allow_builtins
, &is_exact
);
603 /* Local shader has no exact candidates; check the built-ins. */
604 _mesa_glsl_initialize_builtin_functions();
605 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
609 static ir_function_signature
*
610 match_subroutine_by_name(const char *name
,
611 exec_list
*actual_parameters
,
612 struct _mesa_glsl_parse_state
*state
,
616 ir_function_signature
*sig
= NULL
;
617 ir_function
*f
, *found
= NULL
;
618 const char *new_name
;
620 bool is_exact
= false;
623 ralloc_asprintf(ctx
, "%s_%s",
624 _mesa_shader_stage_to_subroutine_prefix(state
->stage
),
626 var
= state
->symbols
->get_variable(new_name
);
630 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
631 f
= state
->subroutine_types
[i
];
632 if (strcmp(f
->name
, var
->type
->without_array()->name
))
641 sig
= found
->matching_signature(state
, actual_parameters
,
647 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
648 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
649 const ast_expression
*array
, ast_expression
*idx
,
650 const char **function_name
, exec_list
*actual_parameters
)
652 if (array
->oper
== ast_array_index
) {
653 /* This handles arrays of arrays */
654 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
656 array
->subexpressions
[0],
657 array
->subexpressions
[1],
660 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
662 YYLTYPE index_loc
= idx
->get_location();
663 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
664 outer_array_idx
, loc
,
667 ir_variable
*sub_var
= NULL
;
668 *function_name
= array
->primary_expression
.identifier
;
670 match_subroutine_by_name(*function_name
, actual_parameters
,
673 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
674 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
679 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
685 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
686 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
689 char *str
= prototype_string(sig
->return_type
, f
->name
,
691 _mesa_glsl_error(loc
, state
, " %s", str
);
697 * Raise a "no matching function" error, listing all possible overloads the
698 * compiler considered so developers can figure out what went wrong.
701 no_matching_function_error(const char *name
,
703 exec_list
*actual_parameters
,
704 _mesa_glsl_parse_state
*state
)
706 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
708 if (state
->symbols
->get_function(name
) == NULL
709 && (!state
->uses_builtin_functions
710 || sh
->symbols
->get_function(name
) == NULL
)) {
711 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
713 char *str
= prototype_string(NULL
, name
, actual_parameters
);
714 _mesa_glsl_error(loc
, state
,
715 "no matching function for call to `%s';"
720 print_function_prototypes(state
, loc
,
721 state
->symbols
->get_function(name
));
723 if (state
->uses_builtin_functions
) {
724 print_function_prototypes(state
, loc
,
725 sh
->symbols
->get_function(name
));
731 * Perform automatic type conversion of constructor parameters
733 * This implements the rules in the "Conversion and Scalar Constructors"
734 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
737 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
739 void *ctx
= ralloc_parent(src
);
740 const unsigned a
= desired_type
->base_type
;
741 const unsigned b
= src
->type
->base_type
;
742 ir_expression
*result
= NULL
;
744 if (src
->type
->is_error())
747 assert(a
<= GLSL_TYPE_IMAGE
);
748 assert(b
<= GLSL_TYPE_IMAGE
);
757 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
759 case GLSL_TYPE_FLOAT
:
760 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
763 result
= new(ctx
) ir_expression(ir_unop_i2u
,
764 new(ctx
) ir_expression(ir_unop_b2i
,
767 case GLSL_TYPE_DOUBLE
:
768 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
770 case GLSL_TYPE_UINT64
:
771 result
= new(ctx
) ir_expression(ir_unop_u642u
, src
);
773 case GLSL_TYPE_INT64
:
774 result
= new(ctx
) ir_expression(ir_unop_i642u
, src
);
776 case GLSL_TYPE_SAMPLER
:
777 result
= new(ctx
) ir_expression(ir_unop_unpack_sampler_2x32
, src
);
779 case GLSL_TYPE_IMAGE
:
780 result
= new(ctx
) ir_expression(ir_unop_unpack_image_2x32
, src
);
787 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
789 case GLSL_TYPE_FLOAT
:
790 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
793 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
795 case GLSL_TYPE_DOUBLE
:
796 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
798 case GLSL_TYPE_UINT64
:
799 result
= new(ctx
) ir_expression(ir_unop_u642i
, src
);
801 case GLSL_TYPE_INT64
:
802 result
= new(ctx
) ir_expression(ir_unop_i642i
, src
);
806 case GLSL_TYPE_FLOAT
:
809 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
812 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
815 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
817 case GLSL_TYPE_DOUBLE
:
818 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
820 case GLSL_TYPE_UINT64
:
821 result
= new(ctx
) ir_expression(ir_unop_u642f
, desired_type
, src
, NULL
);
823 case GLSL_TYPE_INT64
:
824 result
= new(ctx
) ir_expression(ir_unop_i642f
, desired_type
, src
, NULL
);
831 result
= new(ctx
) ir_expression(ir_unop_i2b
,
832 new(ctx
) ir_expression(ir_unop_u2i
,
836 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
838 case GLSL_TYPE_FLOAT
:
839 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
841 case GLSL_TYPE_DOUBLE
:
842 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
844 case GLSL_TYPE_UINT64
:
845 result
= new(ctx
) ir_expression(ir_unop_i642b
,
846 new(ctx
) ir_expression(ir_unop_u642i64
,
849 case GLSL_TYPE_INT64
:
850 result
= new(ctx
) ir_expression(ir_unop_i642b
, desired_type
, src
, NULL
);
854 case GLSL_TYPE_DOUBLE
:
857 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
860 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
863 result
= new(ctx
) ir_expression(ir_unop_f2d
,
864 new(ctx
) ir_expression(ir_unop_b2f
,
867 case GLSL_TYPE_FLOAT
:
868 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
870 case GLSL_TYPE_UINT64
:
871 result
= new(ctx
) ir_expression(ir_unop_u642d
, desired_type
, src
, NULL
);
873 case GLSL_TYPE_INT64
:
874 result
= new(ctx
) ir_expression(ir_unop_i642d
, desired_type
, src
, NULL
);
878 case GLSL_TYPE_UINT64
:
881 result
= new(ctx
) ir_expression(ir_unop_i2u64
, src
);
884 result
= new(ctx
) ir_expression(ir_unop_u2u64
, src
);
887 result
= new(ctx
) ir_expression(ir_unop_i642u64
,
888 new(ctx
) ir_expression(ir_unop_b2i64
,
891 case GLSL_TYPE_FLOAT
:
892 result
= new(ctx
) ir_expression(ir_unop_f2u64
, src
);
894 case GLSL_TYPE_DOUBLE
:
895 result
= new(ctx
) ir_expression(ir_unop_d2u64
, src
);
897 case GLSL_TYPE_INT64
:
898 result
= new(ctx
) ir_expression(ir_unop_i642u64
, src
);
902 case GLSL_TYPE_INT64
:
905 result
= new(ctx
) ir_expression(ir_unop_i2i64
, src
);
908 result
= new(ctx
) ir_expression(ir_unop_u2i64
, src
);
911 result
= new(ctx
) ir_expression(ir_unop_b2i64
, src
);
913 case GLSL_TYPE_FLOAT
:
914 result
= new(ctx
) ir_expression(ir_unop_f2i64
, src
);
916 case GLSL_TYPE_DOUBLE
:
917 result
= new(ctx
) ir_expression(ir_unop_d2i64
, src
);
919 case GLSL_TYPE_UINT64
:
920 result
= new(ctx
) ir_expression(ir_unop_u642i64
, src
);
924 case GLSL_TYPE_SAMPLER
:
928 ir_expression(ir_unop_pack_sampler_2x32
, desired_type
, src
);
932 case GLSL_TYPE_IMAGE
:
936 ir_expression(ir_unop_pack_image_2x32
, desired_type
, src
);
942 assert(result
!= NULL
);
943 assert(result
->type
== desired_type
);
945 /* Try constant folding; it may fold in the conversion we just added. */
946 ir_constant
*const constant
= result
->constant_expression_value(ctx
);
947 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
952 * Perform automatic type and constant conversion of constructor parameters
954 * This implements the rules in the "Implicit Conversions" rules, not the
955 * "Conversion and Scalar Constructors".
957 * After attempting the implicit conversion, an attempt to convert into a
958 * constant valued expression is also done.
960 * The \c from \c ir_rvalue is converted "in place".
962 * \param from Operand that is being converted
963 * \param to Base type the operand will be converted to
964 * \param state GLSL compiler state
967 * If the attempt to convert into a constant expression succeeds, \c true is
968 * returned. Otherwise \c false is returned.
971 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
972 struct _mesa_glsl_parse_state
*state
)
974 void *mem_ctx
= state
;
975 ir_rvalue
*result
= from
;
977 if (to
!= from
->type
->base_type
) {
978 const glsl_type
*desired_type
=
979 glsl_type::get_instance(to
,
980 from
->type
->vector_elements
,
981 from
->type
->matrix_columns
);
983 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
984 /* Even though convert_component() implements the constructor
985 * conversion rules (not the implicit conversion rules), its safe
986 * to use it here because we already checked that the implicit
987 * conversion is legal.
989 result
= convert_component(from
, desired_type
);
993 ir_rvalue
*const constant
= result
->constant_expression_value(mem_ctx
);
995 if (constant
!= NULL
)
998 if (from
!= result
) {
999 from
->replace_with(result
);
1003 return constant
!= NULL
;
1008 * Dereference a specific component from a scalar, vector, or matrix
1011 dereference_component(ir_rvalue
*src
, unsigned component
)
1013 void *ctx
= ralloc_parent(src
);
1014 assert(component
< src
->type
->components());
1016 /* If the source is a constant, just create a new constant instead of a
1017 * dereference of the existing constant.
1019 ir_constant
*constant
= src
->as_constant();
1021 return new(ctx
) ir_constant(constant
, component
);
1023 if (src
->type
->is_scalar()) {
1025 } else if (src
->type
->is_vector()) {
1026 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
1028 assert(src
->type
->is_matrix());
1030 /* Dereference a row of the matrix, then call this function again to get
1031 * a specific element from that row.
1033 const int c
= component
/ src
->type
->column_type()->vector_elements
;
1034 const int r
= component
% src
->type
->column_type()->vector_elements
;
1035 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
1036 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
,
1039 col
->type
= src
->type
->column_type();
1041 return dereference_component(col
, r
);
1044 assert(!"Should not get here.");
1050 process_vec_mat_constructor(exec_list
*instructions
,
1051 const glsl_type
*constructor_type
,
1052 YYLTYPE
*loc
, exec_list
*parameters
,
1053 struct _mesa_glsl_parse_state
*state
)
1057 /* The ARB_shading_language_420pack spec says:
1059 * "If an initializer is a list of initializers enclosed in curly braces,
1060 * the variable being declared must be a vector, a matrix, an array, or a
1063 * int i = { 1 }; // illegal, i is not an aggregate"
1065 if (constructor_type
->vector_elements
<= 1) {
1066 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
1067 "matrices, arrays, and structs");
1068 return ir_rvalue::error_value(ctx
);
1071 exec_list actual_parameters
;
1072 const unsigned parameter_count
=
1073 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1075 if (parameter_count
== 0
1076 || (constructor_type
->is_vector() &&
1077 constructor_type
->vector_elements
!= parameter_count
)
1078 || (constructor_type
->is_matrix() &&
1079 constructor_type
->matrix_columns
!= parameter_count
)) {
1080 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
1081 constructor_type
->is_vector() ? "vector" : "matrix",
1082 constructor_type
->vector_elements
);
1083 return ir_rvalue::error_value(ctx
);
1086 bool all_parameters_are_constant
= true;
1088 /* Type cast each parameter and, if possible, fold constants. */
1089 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1090 /* Apply implicit conversions (not the scalar constructor rules, see the
1091 * spec quote above!) and attempt to convert the parameter to a constant
1092 * valued expression. After doing so, track whether or not all the
1093 * parameters to the constructor are trivially constant valued
1096 all_parameters_are_constant
&=
1097 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
1099 if (constructor_type
->is_matrix()) {
1100 if (ir
->type
!= constructor_type
->column_type()) {
1101 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
1102 "expected: %s, found %s",
1103 constructor_type
->column_type()->name
,
1105 return ir_rvalue::error_value(ctx
);
1107 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
1108 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
1109 "expected: %s, found %s",
1110 constructor_type
->get_scalar_type()->name
,
1112 return ir_rvalue::error_value(ctx
);
1116 if (all_parameters_are_constant
)
1117 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1119 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1121 instructions
->push_tail(var
);
1125 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1126 ir_instruction
*assignment
= NULL
;
1128 if (var
->type
->is_matrix()) {
1130 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1131 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1133 /* use writemask rather than index for vector */
1134 assert(var
->type
->is_vector());
1136 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1137 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
,
1138 (unsigned)(1 << i
));
1141 instructions
->push_tail(assignment
);
1146 return new(ctx
) ir_dereference_variable(var
);
1151 process_array_constructor(exec_list
*instructions
,
1152 const glsl_type
*constructor_type
,
1153 YYLTYPE
*loc
, exec_list
*parameters
,
1154 struct _mesa_glsl_parse_state
*state
)
1157 /* Array constructors come in two forms: sized and unsized. Sized array
1158 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1159 * variables. In this case the number of parameters must exactly match the
1160 * specified size of the array.
1162 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1163 * are vec4 variables. In this case the size of the array being constructed
1164 * is determined by the number of parameters.
1166 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1168 * "There must be exactly the same number of arguments as the size of
1169 * the array being constructed. If no size is present in the
1170 * constructor, then the array is explicitly sized to the number of
1171 * arguments provided. The arguments are assigned in order, starting at
1172 * element 0, to the elements of the constructed array. Each argument
1173 * must be the same type as the element type of the array, or be a type
1174 * that can be converted to the element type of the array according to
1175 * Section 4.1.10 "Implicit Conversions.""
1177 exec_list actual_parameters
;
1178 const unsigned parameter_count
=
1179 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1180 bool is_unsized_array
= constructor_type
->is_unsized_array();
1182 if ((parameter_count
== 0) ||
1183 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1184 const unsigned min_param
= is_unsized_array
1185 ? 1 : constructor_type
->length
;
1187 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1189 is_unsized_array
? "at least" : "exactly",
1190 min_param
, (min_param
<= 1) ? "" : "s");
1191 return ir_rvalue::error_value(ctx
);
1194 if (is_unsized_array
) {
1196 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1198 assert(constructor_type
!= NULL
);
1199 assert(constructor_type
->length
== parameter_count
);
1202 bool all_parameters_are_constant
= true;
1203 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1205 /* Type cast each parameter and, if possible, fold constants. */
1206 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1207 /* Apply implicit conversions (not the scalar constructor rules, see the
1208 * spec quote above!) and attempt to convert the parameter to a constant
1209 * valued expression. After doing so, track whether or not all the
1210 * parameters to the constructor are trivially constant valued
1213 all_parameters_are_constant
&=
1214 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1216 if (constructor_type
->fields
.array
->is_unsized_array()) {
1217 /* As the inner parameters of the constructor are created without
1218 * knowledge of each other we need to check to make sure unsized
1219 * parameters of unsized constructors all end up with the same size.
1221 * e.g we make sure to fail for a constructor like this:
1222 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1223 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1224 * vec4[](vec4(0.0), vec4(1.0)));
1226 if (element_type
->is_unsized_array()) {
1227 /* This is the first parameter so just get the type */
1228 element_type
= ir
->type
;
1229 } else if (element_type
!= ir
->type
) {
1230 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1231 "expected: %s, found %s",
1234 return ir_rvalue::error_value(ctx
);
1236 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1237 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1238 "expected: %s, found %s",
1239 constructor_type
->fields
.array
->name
,
1241 return ir_rvalue::error_value(ctx
);
1243 element_type
= ir
->type
;
1247 if (constructor_type
->fields
.array
->is_unsized_array()) {
1249 glsl_type::get_array_instance(element_type
,
1251 assert(constructor_type
!= NULL
);
1252 assert(constructor_type
->length
== parameter_count
);
1255 if (all_parameters_are_constant
)
1256 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1258 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1260 instructions
->push_tail(var
);
1263 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1264 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1265 new(ctx
) ir_constant(i
));
1267 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1268 instructions
->push_tail(assignment
);
1273 return new(ctx
) ir_dereference_variable(var
);
1278 * Determine if a list consists of a single scalar r-value
1281 single_scalar_parameter(exec_list
*parameters
)
1283 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1284 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1286 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1291 * Generate inline code for a vector constructor
1293 * The generated constructor code will consist of a temporary variable
1294 * declaration of the same type as the constructor. A sequence of assignments
1295 * from constructor parameters to the temporary will follow.
1298 * An \c ir_dereference_variable of the temprorary generated in the constructor
1302 emit_inline_vector_constructor(const glsl_type
*type
,
1303 exec_list
*instructions
,
1304 exec_list
*parameters
,
1307 assert(!parameters
->is_empty());
1309 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1310 instructions
->push_tail(var
);
1312 /* There are three kinds of vector constructors.
1314 * - Construct a vector from a single scalar by replicating that scalar to
1315 * all components of the vector.
1317 * - Construct a vector from at least a matrix. This case should already
1318 * have been taken care of in ast_function_expression::hir by breaking
1319 * down the matrix into a series of column vectors.
1321 * - Construct a vector from an arbirary combination of vectors and
1322 * scalars. The components of the constructor parameters are assigned
1323 * to the vector in order until the vector is full.
1325 const unsigned lhs_components
= type
->components();
1326 if (single_scalar_parameter(parameters
)) {
1327 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1328 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1330 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1331 const unsigned mask
= (1U << lhs_components
) - 1;
1333 assert(rhs
->type
== lhs
->type
);
1335 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1336 instructions
->push_tail(inst
);
1338 unsigned base_component
= 0;
1339 unsigned base_lhs_component
= 0;
1340 ir_constant_data data
;
1341 unsigned constant_mask
= 0, constant_components
= 0;
1343 memset(&data
, 0, sizeof(data
));
1345 foreach_in_list(ir_rvalue
, param
, parameters
) {
1346 unsigned rhs_components
= param
->type
->components();
1348 /* Do not try to assign more components to the vector than it has! */
1349 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1350 rhs_components
= lhs_components
- base_lhs_component
;
1353 const ir_constant
*const c
= param
->as_constant();
1355 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1356 switch (c
->type
->base_type
) {
1357 case GLSL_TYPE_UINT
:
1358 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1361 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1363 case GLSL_TYPE_FLOAT
:
1364 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1366 case GLSL_TYPE_DOUBLE
:
1367 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1369 case GLSL_TYPE_BOOL
:
1370 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1372 case GLSL_TYPE_UINT64
:
1373 data
.u64
[i
+ base_component
] = c
->get_uint64_component(i
);
1375 case GLSL_TYPE_INT64
:
1376 data
.i64
[i
+ base_component
] = c
->get_int64_component(i
);
1379 assert(!"Should not get here.");
1384 /* Mask of fields to be written in the assignment. */
1385 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1386 constant_components
+= rhs_components
;
1388 base_component
+= rhs_components
;
1390 /* Advance the component index by the number of components
1391 * that were just assigned.
1393 base_lhs_component
+= rhs_components
;
1396 if (constant_mask
!= 0) {
1397 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1398 const glsl_type
*rhs_type
=
1399 glsl_type::get_instance(var
->type
->base_type
,
1400 constant_components
,
1402 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1404 ir_instruction
*inst
=
1405 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1406 instructions
->push_tail(inst
);
1410 foreach_in_list(ir_rvalue
, param
, parameters
) {
1411 unsigned rhs_components
= param
->type
->components();
1413 /* Do not try to assign more components to the vector than it has! */
1414 if ((rhs_components
+ base_component
) > lhs_components
) {
1415 rhs_components
= lhs_components
- base_component
;
1418 /* If we do not have any components left to copy, break out of the
1419 * loop. This can happen when initializing a vec4 with a mat3 as the
1420 * mat3 would have been broken into a series of column vectors.
1422 if (rhs_components
== 0) {
1426 const ir_constant
*const c
= param
->as_constant();
1428 /* Mask of fields to be written in the assignment. */
1429 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1432 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1434 /* Generate a swizzle so that LHS and RHS sizes match. */
1436 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1438 ir_instruction
*inst
=
1439 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1440 instructions
->push_tail(inst
);
1443 /* Advance the component index by the number of components that were
1446 base_component
+= rhs_components
;
1449 return new(ctx
) ir_dereference_variable(var
);
1454 * Generate assignment of a portion of a vector to a portion of a matrix column
1456 * \param src_base First component of the source to be used in assignment
1457 * \param column Column of destination to be assiged
1458 * \param row_base First component of the destination column to be assigned
1459 * \param count Number of components to be assigned
1462 * \c src_base + \c count must be less than or equal to the number of
1463 * components in the source vector.
1466 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1467 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1470 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1471 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
,
1474 assert(column_ref
->type
->components() >= (row_base
+ count
));
1475 assert(src
->type
->components() >= (src_base
+ count
));
1477 /* Generate a swizzle that extracts the number of components from the source
1478 * that are to be assigned to the column of the matrix.
1480 if (count
< src
->type
->vector_elements
) {
1481 src
= new(mem_ctx
) ir_swizzle(src
,
1482 src_base
+ 0, src_base
+ 1,
1483 src_base
+ 2, src_base
+ 3,
1487 /* Mask of fields to be written in the assignment. */
1488 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1490 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1495 * Generate inline code for a matrix constructor
1497 * The generated constructor code will consist of a temporary variable
1498 * declaration of the same type as the constructor. A sequence of assignments
1499 * from constructor parameters to the temporary will follow.
1502 * An \c ir_dereference_variable of the temprorary generated in the constructor
1506 emit_inline_matrix_constructor(const glsl_type
*type
,
1507 exec_list
*instructions
,
1508 exec_list
*parameters
,
1511 assert(!parameters
->is_empty());
1513 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1514 instructions
->push_tail(var
);
1516 /* There are three kinds of matrix constructors.
1518 * - Construct a matrix from a single scalar by replicating that scalar to
1519 * along the diagonal of the matrix and setting all other components to
1522 * - Construct a matrix from an arbirary combination of vectors and
1523 * scalars. The components of the constructor parameters are assigned
1524 * to the matrix in column-major order until the matrix is full.
1526 * - Construct a matrix from a single matrix. The source matrix is copied
1527 * to the upper left portion of the constructed matrix, and the remaining
1528 * elements take values from the identity matrix.
1530 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1531 if (single_scalar_parameter(parameters
)) {
1532 /* Assign the scalar to the X component of a vec4, and fill the remaining
1533 * components with zero.
1535 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1536 assert(first_param
->type
->is_float() || first_param
->type
->is_double());
1537 ir_variable
*rhs_var
=
1538 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1541 instructions
->push_tail(rhs_var
);
1543 ir_constant_data zero
;
1544 for (unsigned i
= 0; i
< 4; i
++)
1545 if (first_param
->type
->is_float())
1550 ir_instruction
*inst
=
1551 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1552 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1554 instructions
->push_tail(inst
);
1556 ir_dereference
*const rhs_ref
=
1557 new(ctx
) ir_dereference_variable(rhs_var
);
1559 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1560 instructions
->push_tail(inst
);
1562 /* Assign the temporary vector to each column of the destination matrix
1563 * with a swizzle that puts the X component on the diagonal of the
1564 * matrix. In some cases this may mean that the X component does not
1565 * get assigned into the column at all (i.e., when the matrix has more
1566 * columns than rows).
1568 static const unsigned rhs_swiz
[4][4] = {
1575 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1576 type
->vector_elements
);
1577 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1578 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1579 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1582 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1583 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1584 type
->vector_elements
);
1586 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1587 instructions
->push_tail(inst
);
1590 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1591 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1592 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
,
1595 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1596 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1597 type
->vector_elements
);
1599 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1600 instructions
->push_tail(inst
);
1602 } else if (first_param
->type
->is_matrix()) {
1603 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1605 * "If a matrix is constructed from a matrix, then each component
1606 * (column i, row j) in the result that has a corresponding
1607 * component (column i, row j) in the argument will be initialized
1608 * from there. All other components will be initialized to the
1609 * identity matrix. If a matrix argument is given to a matrix
1610 * constructor, it is an error to have any other arguments."
1612 assert(first_param
->next
->is_tail_sentinel());
1613 ir_rvalue
*const src_matrix
= first_param
;
1615 /* If the source matrix is smaller, pre-initialize the relavent parts of
1616 * the destination matrix to the identity matrix.
1618 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1619 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1621 /* If the source matrix has fewer rows, every column of the
1622 * destination must be initialized. Otherwise only the columns in
1623 * the destination that do not exist in the source must be
1627 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1628 ? 0 : src_matrix
->type
->matrix_columns
;
1630 const glsl_type
*const col_type
= var
->type
->column_type();
1631 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1632 ir_constant_data ident
;
1634 if (!col_type
->is_double()) {
1639 ident
.f
[col
] = 1.0f
;
1648 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1650 ir_rvalue
*const lhs
=
1651 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1653 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1654 instructions
->push_tail(inst
);
1658 /* Assign columns from the source matrix to the destination matrix.
1660 * Since the parameter will be used in the RHS of multiple assignments,
1661 * generate a temporary and copy the paramter there.
1663 ir_variable
*const rhs_var
=
1664 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1666 instructions
->push_tail(rhs_var
);
1668 ir_dereference
*const rhs_var_ref
=
1669 new(ctx
) ir_dereference_variable(rhs_var
);
1670 ir_instruction
*const inst
=
1671 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1672 instructions
->push_tail(inst
);
1674 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1675 var
->type
->vector_elements
);
1676 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1677 var
->type
->matrix_columns
);
1679 unsigned swiz
[4] = { 0, 0, 0, 0 };
1680 for (unsigned i
= 1; i
< last_row
; i
++)
1683 const unsigned write_mask
= (1U << last_row
) - 1;
1685 for (unsigned i
= 0; i
< last_col
; i
++) {
1686 ir_dereference
*const lhs
=
1687 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1688 ir_rvalue
*const rhs_col
=
1689 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1691 /* If one matrix has columns that are smaller than the columns of the
1692 * other matrix, wrap the column access of the larger with a swizzle
1693 * so that the LHS and RHS of the assignment have the same size (and
1694 * therefore have the same type).
1696 * It would be perfectly valid to unconditionally generate the
1697 * swizzles, this this will typically result in a more compact IR
1701 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1702 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1707 ir_instruction
*inst
=
1708 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1709 instructions
->push_tail(inst
);
1712 const unsigned cols
= type
->matrix_columns
;
1713 const unsigned rows
= type
->vector_elements
;
1714 unsigned remaining_slots
= rows
* cols
;
1715 unsigned col_idx
= 0;
1716 unsigned row_idx
= 0;
1718 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1719 unsigned rhs_components
= rhs
->type
->components();
1720 unsigned rhs_base
= 0;
1722 if (remaining_slots
== 0)
1725 /* Since the parameter might be used in the RHS of two assignments,
1726 * generate a temporary and copy the paramter there.
1728 ir_variable
*rhs_var
=
1729 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1730 instructions
->push_tail(rhs_var
);
1732 ir_dereference
*rhs_var_ref
=
1733 new(ctx
) ir_dereference_variable(rhs_var
);
1734 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1735 instructions
->push_tail(inst
);
1738 /* Assign the current parameter to as many components of the matrix
1741 * NOTE: A single vector parameter can span two matrix columns. A
1742 * single vec4, for example, can completely fill a mat2.
1744 unsigned count
= MIN2(rows
- row_idx
,
1745 rhs_components
- rhs_base
);
1747 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1748 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1753 instructions
->push_tail(inst
);
1756 remaining_slots
-= count
;
1758 /* Sometimes, there is still data left in the parameters and
1759 * components left to be set in the destination but in other
1762 if (row_idx
>= rows
) {
1766 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1770 return new(ctx
) ir_dereference_variable(var
);
1775 emit_inline_record_constructor(const glsl_type
*type
,
1776 exec_list
*instructions
,
1777 exec_list
*parameters
,
1780 ir_variable
*const var
=
1781 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1782 ir_dereference_variable
*const d
=
1783 new(mem_ctx
) ir_dereference_variable(var
);
1785 instructions
->push_tail(var
);
1787 exec_node
*node
= parameters
->get_head_raw();
1788 for (unsigned i
= 0; i
< type
->length
; i
++) {
1789 assert(!node
->is_tail_sentinel());
1791 ir_dereference
*const lhs
=
1792 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1793 type
->fields
.structure
[i
].name
);
1795 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1796 assert(rhs
!= NULL
);
1798 ir_instruction
*const assign
=
1799 new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1801 instructions
->push_tail(assign
);
1810 process_record_constructor(exec_list
*instructions
,
1811 const glsl_type
*constructor_type
,
1812 YYLTYPE
*loc
, exec_list
*parameters
,
1813 struct _mesa_glsl_parse_state
*state
)
1816 /* From page 32 (page 38 of the PDF) of the GLSL 1.20 spec:
1818 * "The arguments to the constructor will be used to set the structure's
1819 * fields, in order, using one argument per field. Each argument must
1820 * be the same type as the field it sets, or be a type that can be
1821 * converted to the field's type according to Section 4.1.10 “Implicit
1824 * From page 35 (page 41 of the PDF) of the GLSL 4.20 spec:
1826 * "In all cases, the innermost initializer (i.e., not a list of
1827 * initializers enclosed in curly braces) applied to an object must
1828 * have the same type as the object being initialized or be a type that
1829 * can be converted to the object's type according to section 4.1.10
1830 * "Implicit Conversions". In the latter case, an implicit conversion
1831 * will be done on the initializer before the assignment is done."
1833 exec_list actual_parameters
;
1835 const unsigned parameter_count
=
1836 process_parameters(instructions
, &actual_parameters
, parameters
,
1839 if (parameter_count
!= constructor_type
->length
) {
1840 _mesa_glsl_error(loc
, state
,
1841 "%s parameters in constructor for `%s'",
1842 parameter_count
> constructor_type
->length
1843 ? "too many": "insufficient",
1844 constructor_type
->name
);
1845 return ir_rvalue::error_value(ctx
);
1848 bool all_parameters_are_constant
= true;
1851 /* Type cast each parameter and, if possible, fold constants. */
1852 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1854 const glsl_struct_field
*struct_field
=
1855 &constructor_type
->fields
.structure
[i
];
1857 /* Apply implicit conversions (not the scalar constructor rules, see the
1858 * spec quote above!) and attempt to convert the parameter to a constant
1859 * valued expression. After doing so, track whether or not all the
1860 * parameters to the constructor are trivially constant valued
1863 all_parameters_are_constant
&=
1864 implicitly_convert_component(ir
, struct_field
->type
->base_type
,
1867 if (ir
->type
!= struct_field
->type
) {
1868 _mesa_glsl_error(loc
, state
,
1869 "parameter type mismatch in constructor for `%s.%s' "
1871 constructor_type
->name
,
1874 struct_field
->type
->name
);
1875 return ir_rvalue::error_value(ctx
);
1881 if (all_parameters_are_constant
) {
1882 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1884 return emit_inline_record_constructor(constructor_type
, instructions
,
1885 &actual_parameters
, state
);
1890 ast_function_expression::handle_method(exec_list
*instructions
,
1891 struct _mesa_glsl_parse_state
*state
)
1893 const ast_expression
*field
= subexpressions
[0];
1897 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1898 YYLTYPE loc
= get_location();
1899 state
->check_version(120, 300, &loc
, "methods not supported");
1902 method
= field
->primary_expression
.identifier
;
1904 /* This would prevent to raise "uninitialized variable" warnings when
1905 * calling array.length.
1907 field
->subexpressions
[0]->set_is_lhs(true);
1908 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1909 if (strcmp(method
, "length") == 0) {
1910 if (!this->expressions
.is_empty()) {
1911 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1915 if (op
->type
->is_array()) {
1916 if (op
->type
->is_unsized_array()) {
1917 if (!state
->has_shader_storage_buffer_objects()) {
1918 _mesa_glsl_error(&loc
, state
,
1919 "length called on unsized array"
1920 " only available with"
1921 " ARB_shader_storage_buffer_object");
1923 /* Calculate length of an unsized array in run-time */
1924 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
,
1927 result
= new(ctx
) ir_constant(op
->type
->array_size());
1929 } else if (op
->type
->is_vector()) {
1930 if (state
->has_420pack()) {
1931 /* .length() returns int. */
1932 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1934 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1935 " available with ARB_shading_language_420pack");
1938 } else if (op
->type
->is_matrix()) {
1939 if (state
->has_420pack()) {
1940 /* .length() returns int. */
1941 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1943 _mesa_glsl_error(&loc
, state
, "length method on matrix only"
1944 " available with ARB_shading_language_420pack");
1948 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1952 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1957 return ir_rvalue::error_value(ctx
);
1960 static inline bool is_valid_constructor(const glsl_type
*type
,
1961 struct _mesa_glsl_parse_state
*state
)
1963 return type
->is_numeric() || type
->is_boolean() ||
1964 (state
->has_bindless() && (type
->is_sampler() || type
->is_image()));
1968 ast_function_expression::hir(exec_list
*instructions
,
1969 struct _mesa_glsl_parse_state
*state
)
1972 /* There are three sorts of function calls.
1974 * 1. constructors - The first subexpression is an ast_type_specifier.
1975 * 2. methods - Only the .length() method of array types.
1976 * 3. functions - Calls to regular old functions.
1979 if (is_constructor()) {
1980 const ast_type_specifier
*type
=
1981 (ast_type_specifier
*) subexpressions
[0];
1982 YYLTYPE loc
= type
->get_location();
1985 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1987 /* constructor_type can be NULL if a variable with the same name as the
1988 * structure has come into scope.
1990 if (constructor_type
== NULL
) {
1991 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1992 "may be shadowed by a variable with the same name)",
1994 return ir_rvalue::error_value(ctx
);
1998 /* Constructors for opaque types are illegal.
2000 * From section 4.1.7 of the ARB_bindless_texture spec:
2002 * "Samplers are represented using 64-bit integer handles, and may be "
2003 * converted to and from 64-bit integers using constructors."
2005 * From section 4.1.X of the ARB_bindless_texture spec:
2007 * "Images are represented using 64-bit integer handles, and may be
2008 * converted to and from 64-bit integers using constructors."
2010 if (constructor_type
->contains_atomic() ||
2011 (!state
->has_bindless() && constructor_type
->contains_opaque())) {
2012 _mesa_glsl_error(& loc
, state
, "cannot construct %s type `%s'",
2013 state
->has_bindless() ? "atomic" : "opaque",
2014 constructor_type
->name
);
2015 return ir_rvalue::error_value(ctx
);
2018 if (constructor_type
->is_subroutine()) {
2019 _mesa_glsl_error(& loc
, state
,
2020 "subroutine name cannot be a constructor `%s'",
2021 constructor_type
->name
);
2022 return ir_rvalue::error_value(ctx
);
2025 if (constructor_type
->is_array()) {
2026 if (!state
->check_version(120, 300, &loc
,
2027 "array constructors forbidden")) {
2028 return ir_rvalue::error_value(ctx
);
2031 return process_array_constructor(instructions
, constructor_type
,
2032 & loc
, &this->expressions
, state
);
2036 /* There are two kinds of constructor calls. Constructors for arrays and
2037 * structures must have the exact number of arguments with matching types
2038 * in the correct order. These constructors follow essentially the same
2039 * type matching rules as functions.
2041 * Constructors for built-in language types, such as mat4 and vec2, are
2042 * free form. The only requirements are that the parameters must provide
2043 * enough values of the correct scalar type and that no arguments are
2044 * given past the last used argument.
2046 * When using the C-style initializer syntax from GLSL 4.20, constructors
2047 * must have the exact number of arguments with matching types in the
2050 if (constructor_type
->is_record()) {
2051 return process_record_constructor(instructions
, constructor_type
,
2052 &loc
, &this->expressions
,
2056 if (!is_valid_constructor(constructor_type
, state
))
2057 return ir_rvalue::error_value(ctx
);
2059 /* Total number of components of the type being constructed. */
2060 const unsigned type_components
= constructor_type
->components();
2062 /* Number of components from parameters that have actually been
2063 * consumed. This is used to perform several kinds of error checking.
2065 unsigned components_used
= 0;
2067 unsigned matrix_parameters
= 0;
2068 unsigned nonmatrix_parameters
= 0;
2069 exec_list actual_parameters
;
2071 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
2072 ir_rvalue
*result
= ast
->hir(instructions
, state
);
2074 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2076 * "It is an error to provide extra arguments beyond this
2077 * last used argument."
2079 if (components_used
>= type_components
) {
2080 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
2082 constructor_type
->name
);
2083 return ir_rvalue::error_value(ctx
);
2086 if (!is_valid_constructor(result
->type
, state
)) {
2087 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
2088 "non-numeric data type",
2089 constructor_type
->name
);
2090 return ir_rvalue::error_value(ctx
);
2093 /* Count the number of matrix and nonmatrix parameters. This
2094 * is used below to enforce some of the constructor rules.
2096 if (result
->type
->is_matrix())
2097 matrix_parameters
++;
2099 nonmatrix_parameters
++;
2101 actual_parameters
.push_tail(result
);
2102 components_used
+= result
->type
->components();
2105 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2107 * "It is an error to construct matrices from other matrices. This
2108 * is reserved for future use."
2110 if (matrix_parameters
> 0
2111 && constructor_type
->is_matrix()
2112 && !state
->check_version(120, 100, &loc
,
2113 "cannot construct `%s' from a matrix",
2114 constructor_type
->name
)) {
2115 return ir_rvalue::error_value(ctx
);
2118 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
2120 * "If a matrix argument is given to a matrix constructor, it is
2121 * an error to have any other arguments."
2123 if ((matrix_parameters
> 0)
2124 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
2125 && constructor_type
->is_matrix()) {
2126 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
2127 "matrix must be only parameter",
2128 constructor_type
->name
);
2129 return ir_rvalue::error_value(ctx
);
2132 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
2134 * "In these cases, there must be enough components provided in the
2135 * arguments to provide an initializer for every component in the
2136 * constructed value."
2138 if (components_used
< type_components
&& components_used
!= 1
2139 && matrix_parameters
== 0) {
2140 _mesa_glsl_error(& loc
, state
, "too few components to construct "
2142 constructor_type
->name
);
2143 return ir_rvalue::error_value(ctx
);
2146 /* Matrices can never be consumed as is by any constructor but matrix
2147 * constructors. If the constructor type is not matrix, always break the
2148 * matrix up into a series of column vectors.
2150 if (!constructor_type
->is_matrix()) {
2151 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2152 if (!matrix
->type
->is_matrix())
2155 /* Create a temporary containing the matrix. */
2156 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2158 instructions
->push_tail(var
);
2159 instructions
->push_tail(
2160 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
2162 var
->constant_value
= matrix
->constant_expression_value(ctx
);
2164 /* Replace the matrix with dereferences of its columns. */
2165 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2166 matrix
->insert_before(
2167 new (ctx
) ir_dereference_array(var
,
2168 new(ctx
) ir_constant(i
)));
2174 bool all_parameters_are_constant
= true;
2176 /* Type cast each parameter and, if possible, fold constants.*/
2177 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2178 const glsl_type
*desired_type
;
2180 /* From section 5.4.1 of the ARB_bindless_texture spec:
2182 * "In the following four constructors, the low 32 bits of the sampler
2183 * type correspond to the .x component of the uvec2 and the high 32
2184 * bits correspond to the .y component."
2186 * uvec2(any sampler type) // Converts a sampler type to a
2187 * // pair of 32-bit unsigned integers
2188 * any sampler type(uvec2) // Converts a pair of 32-bit unsigned integers to
2190 * uvec2(any image type) // Converts an image type to a
2191 * // pair of 32-bit unsigned integers
2192 * any image type(uvec2) // Converts a pair of 32-bit unsigned integers to
2195 if (ir
->type
->is_sampler() || ir
->type
->is_image()) {
2196 /* Convert a sampler/image type to a pair of 32-bit unsigned
2197 * integers as defined by ARB_bindless_texture.
2199 if (constructor_type
!= glsl_type::uvec2_type
) {
2200 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2201 "be converted to a pair of 32-bit unsigned "
2204 desired_type
= glsl_type::uvec2_type
;
2205 } else if (constructor_type
->is_sampler() ||
2206 constructor_type
->is_image()) {
2207 /* Convert a pair of 32-bit unsigned integers to a sampler or image
2208 * type as defined by ARB_bindless_texture.
2210 if (ir
->type
!= glsl_type::uvec2_type
) {
2211 _mesa_glsl_error(&loc
, state
, "sampler and image types can only "
2212 "be converted from a pair of 32-bit unsigned "
2215 desired_type
= constructor_type
;
2218 glsl_type::get_instance(constructor_type
->base_type
,
2219 ir
->type
->vector_elements
,
2220 ir
->type
->matrix_columns
);
2223 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2225 /* Attempt to convert the parameter to a constant valued expression.
2226 * After doing so, track whether or not all the parameters to the
2227 * constructor are trivially constant valued expressions.
2229 ir_rvalue
*const constant
= result
->constant_expression_value(ctx
);
2231 if (constant
!= NULL
)
2234 all_parameters_are_constant
= false;
2237 ir
->replace_with(result
);
2241 /* If all of the parameters are trivially constant, create a
2242 * constant representing the complete collection of parameters.
2244 if (all_parameters_are_constant
) {
2245 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2246 } else if (constructor_type
->is_scalar()) {
2247 return dereference_component((ir_rvalue
*)
2248 actual_parameters
.get_head_raw(),
2250 } else if (constructor_type
->is_vector()) {
2251 return emit_inline_vector_constructor(constructor_type
,
2256 assert(constructor_type
->is_matrix());
2257 return emit_inline_matrix_constructor(constructor_type
,
2262 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2263 return handle_method(instructions
, state
);
2265 const ast_expression
*id
= subexpressions
[0];
2266 const char *func_name
= NULL
;
2267 YYLTYPE loc
= get_location();
2268 exec_list actual_parameters
;
2269 ir_variable
*sub_var
= NULL
;
2270 ir_rvalue
*array_idx
= NULL
;
2272 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2275 if (id
->oper
== ast_array_index
) {
2276 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2277 id
->subexpressions
[0],
2278 id
->subexpressions
[1], &func_name
,
2279 &actual_parameters
);
2280 } else if (id
->oper
== ast_identifier
) {
2281 func_name
= id
->primary_expression
.identifier
;
2283 _mesa_glsl_error(&loc
, state
, "function name is not an identifier");
2286 /* an error was emitted earlier */
2288 return ir_rvalue::error_value(ctx
);
2290 ir_function_signature
*sig
=
2291 match_function_by_name(func_name
, &actual_parameters
, state
);
2293 ir_rvalue
*value
= NULL
;
2295 sig
= match_subroutine_by_name(func_name
, &actual_parameters
,
2300 no_matching_function_error(func_name
, &loc
,
2301 &actual_parameters
, state
);
2302 value
= ir_rvalue::error_value(ctx
);
2303 } else if (!verify_parameter_modes(state
, sig
,
2305 this->expressions
)) {
2306 /* an error has already been emitted */
2307 value
= ir_rvalue::error_value(ctx
);
2308 } else if (sig
->is_builtin() && strcmp(func_name
, "ftransform") == 0) {
2309 /* ftransform refers to global variables, and we don't have any code
2310 * for remapping the variable references in the built-in shader.
2313 state
->symbols
->get_variable("gl_ModelViewProjectionMatrix");
2314 ir_variable
*vtx
= state
->symbols
->get_variable("gl_Vertex");
2315 value
= new(ctx
) ir_expression(ir_binop_mul
, glsl_type::vec4_type
,
2316 new(ctx
) ir_dereference_variable(mvp
),
2317 new(ctx
) ir_dereference_variable(vtx
));
2319 if (state
->stage
== MESA_SHADER_TESS_CTRL
&&
2320 sig
->is_builtin() && strcmp(func_name
, "barrier") == 0) {
2321 if (state
->current_function
== NULL
||
2322 strcmp(state
->current_function
->function_name(), "main") != 0) {
2323 _mesa_glsl_error(&loc
, state
,
2324 "barrier() may only be used in main()");
2327 if (state
->found_return
) {
2328 _mesa_glsl_error(&loc
, state
,
2329 "barrier() may not be used after return");
2332 if (instructions
!= &state
->current_function
->body
) {
2333 _mesa_glsl_error(&loc
, state
,
2334 "barrier() may not be used in control flow");
2338 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
,
2341 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2344 instructions
->push_tail(tmp
);
2345 value
= new(ctx
) ir_dereference_variable(tmp
);
2352 unreachable("not reached");
2356 ast_function_expression::has_sequence_subexpression() const
2358 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2359 if (ast
->has_sequence_subexpression())
2367 ast_aggregate_initializer::hir(exec_list
*instructions
,
2368 struct _mesa_glsl_parse_state
*state
)
2371 YYLTYPE loc
= this->get_location();
2373 if (!this->constructor_type
) {
2374 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2375 return ir_rvalue::error_value(ctx
);
2377 const glsl_type
*const constructor_type
= this->constructor_type
;
2379 if (!state
->has_420pack()) {
2380 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2381 "GL_ARB_shading_language_420pack extension");
2382 return ir_rvalue::error_value(ctx
);
2385 if (constructor_type
->is_array()) {
2386 return process_array_constructor(instructions
, constructor_type
, &loc
,
2387 &this->expressions
, state
);
2390 if (constructor_type
->is_record()) {
2391 return process_record_constructor(instructions
, constructor_type
, &loc
,
2392 &this->expressions
, state
);
2395 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2396 &this->expressions
, state
);