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 "glsl_types.h"
28 #include "main/core.h" /* for MIN2 */
29 #include "main/shaderobj.h"
32 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
35 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
36 struct _mesa_glsl_parse_state
*state
);
39 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
40 exec_list
*parameters
,
41 struct _mesa_glsl_parse_state
*state
)
45 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
46 ir_rvalue
*result
= ast
->hir(instructions
, state
);
48 ir_constant
*const constant
= result
->constant_expression_value();
52 actual_parameters
->push_tail(result
);
61 * Generate a source prototype for a function signature
63 * \param return_type Return type of the function. May be \c NULL.
64 * \param name Name of the function.
65 * \param parameters List of \c ir_instruction nodes representing the
66 * parameter list for the function. This may be either a
67 * formal (\c ir_variable) or actual (\c ir_rvalue)
68 * parameter list. Only the type is used.
71 * A ralloced string representing the prototype of the function.
74 prototype_string(const glsl_type
*return_type
, const char *name
,
75 exec_list
*parameters
)
79 if (return_type
!= NULL
)
80 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
82 ralloc_asprintf_append(&str
, "%s(", name
);
84 const char *comma
= "";
85 foreach_in_list(const ir_variable
, param
, parameters
) {
86 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
90 ralloc_strcat(&str
, ")");
95 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
96 const ir_variable
*formal
, const ir_variable
*actual
)
99 * From the ARB_shader_image_load_store specification:
101 * "The values of image variables qualified with coherent,
102 * volatile, restrict, readonly, or writeonly may not be passed
103 * to functions whose formal parameters lack such
104 * qualifiers. [...] It is legal to have additional qualifiers
105 * on a formal parameter, but not to have fewer."
107 if (actual
->data
.image_coherent
&& !formal
->data
.image_coherent
) {
108 _mesa_glsl_error(loc
, state
,
109 "function call parameter `%s' drops "
110 "`coherent' qualifier", formal
->name
);
114 if (actual
->data
.image_volatile
&& !formal
->data
.image_volatile
) {
115 _mesa_glsl_error(loc
, state
,
116 "function call parameter `%s' drops "
117 "`volatile' qualifier", formal
->name
);
121 if (actual
->data
.image_restrict
&& !formal
->data
.image_restrict
) {
122 _mesa_glsl_error(loc
, state
,
123 "function call parameter `%s' drops "
124 "`restrict' qualifier", formal
->name
);
128 if (actual
->data
.image_read_only
&& !formal
->data
.image_read_only
) {
129 _mesa_glsl_error(loc
, state
,
130 "function call parameter `%s' drops "
131 "`readonly' qualifier", formal
->name
);
135 if (actual
->data
.image_write_only
&& !formal
->data
.image_write_only
) {
136 _mesa_glsl_error(loc
, state
,
137 "function call parameter `%s' drops "
138 "`writeonly' qualifier", formal
->name
);
146 verify_first_atomic_ssbo_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
149 if (!var
|| !var
->is_in_shader_storage_block()) {
150 _mesa_glsl_error(loc
, state
, "First argument to atomic function "
151 "must be a buffer variable");
158 is_atomic_ssbo_function(const char *func_name
)
160 return !strcmp(func_name
, "atomicAdd") ||
161 !strcmp(func_name
, "atomicMin") ||
162 !strcmp(func_name
, "atomicMax") ||
163 !strcmp(func_name
, "atomicAnd") ||
164 !strcmp(func_name
, "atomicOr") ||
165 !strcmp(func_name
, "atomicXor") ||
166 !strcmp(func_name
, "atomicExchange") ||
167 !strcmp(func_name
, "atomicCompSwap");
171 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
172 * that 'const_in' formal parameters (an extension in our IR) correspond to
173 * ir_constant actual parameters.
176 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
177 ir_function_signature
*sig
,
178 exec_list
&actual_ir_parameters
,
179 exec_list
&actual_ast_parameters
)
181 exec_node
*actual_ir_node
= actual_ir_parameters
.head
;
182 exec_node
*actual_ast_node
= actual_ast_parameters
.head
;
184 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
185 /* The lists must be the same length. */
186 assert(!actual_ir_node
->is_tail_sentinel());
187 assert(!actual_ast_node
->is_tail_sentinel());
189 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
190 const ast_expression
*const actual_ast
=
191 exec_node_data(ast_expression
, actual_ast_node
, link
);
193 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
196 YYLTYPE loc
= actual_ast
->get_location();
198 /* Verify that 'const_in' parameters are ir_constants. */
199 if (formal
->data
.mode
== ir_var_const_in
&&
200 actual
->ir_type
!= ir_type_constant
) {
201 _mesa_glsl_error(&loc
, state
,
202 "parameter `in %s' must be a constant expression",
207 /* Verify that shader_in parameters are shader inputs */
208 if (formal
->data
.must_be_shader_input
) {
209 ir_variable
*var
= actual
->variable_referenced();
210 if (var
&& var
->data
.mode
!= ir_var_shader_in
) {
211 _mesa_glsl_error(&loc
, state
,
212 "parameter `%s` must be a shader input",
217 if (actual
->ir_type
== ir_type_swizzle
) {
218 _mesa_glsl_error(&loc
, state
,
219 "parameter `%s` must not be swizzled",
225 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
226 if (formal
->data
.mode
== ir_var_function_out
227 || formal
->data
.mode
== ir_var_function_inout
) {
228 const char *mode
= NULL
;
229 switch (formal
->data
.mode
) {
230 case ir_var_function_out
: mode
= "out"; break;
231 case ir_var_function_inout
: mode
= "inout"; break;
232 default: assert(false); break;
235 /* This AST-based check catches errors like f(i++). The IR-based
236 * is_lvalue() is insufficient because the actual parameter at the
237 * IR-level is just a temporary value, which is an l-value.
239 if (actual_ast
->non_lvalue_description
!= NULL
) {
240 _mesa_glsl_error(&loc
, state
,
241 "function parameter '%s %s' references a %s",
243 actual_ast
->non_lvalue_description
);
247 ir_variable
*var
= actual
->variable_referenced();
249 var
->data
.assigned
= true;
251 if (var
&& var
->data
.read_only
) {
252 _mesa_glsl_error(&loc
, state
,
253 "function parameter '%s %s' references the "
254 "read-only variable '%s'",
256 actual
->variable_referenced()->name
);
258 } else if (!actual
->is_lvalue()) {
259 /* Even though ir_binop_vector_extract is not an l-value, let it
260 * slop through. generate_call will handle it correctly.
262 ir_expression
*const expr
= ((ir_rvalue
*) actual
)->as_expression();
264 || expr
->operation
!= ir_binop_vector_extract
265 || !expr
->operands
[0]->is_lvalue()) {
266 _mesa_glsl_error(&loc
, state
,
267 "function parameter '%s %s' is not an lvalue",
274 if (formal
->type
->is_image() &&
275 actual
->variable_referenced()) {
276 if (!verify_image_parameter(&loc
, state
, formal
,
277 actual
->variable_referenced()))
281 actual_ir_node
= actual_ir_node
->next
;
282 actual_ast_node
= actual_ast_node
->next
;
285 /* The first parameter of atomic functions must be a buffer variable */
286 const char *func_name
= sig
->function_name();
287 bool is_atomic_ssbo
= is_atomic_ssbo_function(func_name
);
288 if (is_atomic_ssbo
) {
289 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_parameters
.head
;
291 const ast_expression
*const actual_ast
=
292 exec_node_data(ast_expression
, actual_ast_parameters
.head
, link
);
293 YYLTYPE loc
= actual_ast
->get_location();
295 if (!verify_first_atomic_ssbo_parameter(&loc
, state
,
296 actual
->variable_referenced())) {
305 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
306 exec_list
*before_instructions
, exec_list
*after_instructions
,
307 bool parameter_is_inout
)
309 ir_expression
*const expr
= actual
->as_expression();
311 /* If the types match exactly and the parameter is not a vector-extract,
312 * nothing needs to be done to fix the parameter.
314 if (formal_type
== actual
->type
315 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
318 /* To convert an out parameter, we need to create a temporary variable to
319 * hold the value before conversion, and then perform the conversion after
320 * the function call returns.
322 * This has the effect of transforming code like this:
328 * Into IR that's equivalent to this:
332 * int out_parameter_conversion;
333 * f(out_parameter_conversion);
334 * value = float(out_parameter_conversion);
336 * If the parameter is an ir_expression of ir_binop_vector_extract,
337 * additional conversion is needed in the post-call re-write.
340 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
342 before_instructions
->push_tail(tmp
);
344 /* If the parameter is an inout parameter, copy the value of the actual
345 * parameter to the new temporary. Note that no type conversion is allowed
346 * here because inout parameters must match types exactly.
348 if (parameter_is_inout
) {
349 /* Inout parameters should never require conversion, since that would
350 * require an implicit conversion to exist both to and from the formal
351 * parameter type, and there are no bidirectional implicit conversions.
353 assert (actual
->type
== formal_type
);
355 ir_dereference_variable
*const deref_tmp_1
=
356 new(mem_ctx
) ir_dereference_variable(tmp
);
357 ir_assignment
*const assignment
=
358 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
359 before_instructions
->push_tail(assignment
);
362 /* Replace the parameter in the call with a dereference of the new
365 ir_dereference_variable
*const deref_tmp_2
=
366 new(mem_ctx
) ir_dereference_variable(tmp
);
367 actual
->replace_with(deref_tmp_2
);
370 /* Copy the temporary variable to the actual parameter with optional
371 * type conversion applied.
373 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
374 if (actual
->type
!= formal_type
)
375 rhs
= convert_component(rhs
, actual
->type
);
377 ir_rvalue
*lhs
= actual
;
378 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
379 rhs
= new(mem_ctx
) ir_expression(ir_triop_vector_insert
,
380 expr
->operands
[0]->type
,
381 expr
->operands
[0]->clone(mem_ctx
, NULL
),
383 expr
->operands
[1]->clone(mem_ctx
, NULL
));
384 lhs
= expr
->operands
[0]->clone(mem_ctx
, NULL
);
387 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
388 after_instructions
->push_tail(assignment_2
);
392 * Generate a function call.
394 * For non-void functions, this returns a dereference of the temporary variable
395 * which stores the return value for the call. For void functions, this returns
399 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
400 exec_list
*actual_parameters
,
401 ir_variable
*sub_var
,
402 ir_rvalue
*array_idx
,
403 struct _mesa_glsl_parse_state
*state
)
406 exec_list post_call_conversions
;
408 /* Perform implicit conversion of arguments. For out parameters, we need
409 * to place them in a temporary variable and do the conversion after the
410 * call takes place. Since we haven't emitted the call yet, we'll place
411 * the post-call conversions in a temporary exec_list, and emit them later.
413 foreach_two_lists(formal_node
, &sig
->parameters
,
414 actual_node
, actual_parameters
) {
415 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
416 ir_variable
*formal
= (ir_variable
*) formal_node
;
418 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
419 switch (formal
->data
.mode
) {
420 case ir_var_const_in
:
421 case ir_var_function_in
: {
423 = convert_component(actual
, formal
->type
);
424 actual
->replace_with(converted
);
427 case ir_var_function_out
:
428 case ir_var_function_inout
:
429 fix_parameter(ctx
, actual
, formal
->type
,
430 instructions
, &post_call_conversions
,
431 formal
->data
.mode
== ir_var_function_inout
);
434 assert (!"Illegal formal parameter mode");
440 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
442 * "Initializers for const declarations must be formed from literal
443 * values, other const variables (not including function call
444 * paramaters), or expressions of these.
446 * Constructors may be used in such expressions, but function calls may
449 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
451 * "A constant expression is one of
455 * - a built-in function call whose arguments are all constant
456 * expressions, with the exception of the texture lookup
457 * functions, the noise functions, and ftransform. The built-in
458 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
459 * inside an initializer with an argument that is a constant
462 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
464 * "A constant expression is one of
468 * - a built-in function call whose arguments are all constant
469 * expressions, with the exception of the texture lookup
472 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
474 * "A constant expression is one of
478 * - a built-in function call whose arguments are all constant
479 * expressions, with the exception of the texture lookup
480 * functions. The built-in functions dFdx, dFdy, and fwidth must
481 * return 0 when evaluated inside an initializer with an argument
482 * that is a constant expression."
484 * If the function call is a constant expression, don't generate any
485 * instructions; just generate an ir_constant.
487 if (state
->is_version(120, 100)) {
488 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
494 ir_dereference_variable
*deref
= NULL
;
495 if (!sig
->return_type
->is_void()) {
496 /* Create a new temporary to hold the return value. */
497 char *const name
= ir_variable::temporaries_allocate_names
498 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
503 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
504 instructions
->push_tail(var
);
508 deref
= new(ctx
) ir_dereference_variable(var
);
511 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
, sub_var
, array_idx
);
512 instructions
->push_tail(call
);
514 /* Also emit any necessary out-parameter conversions. */
515 instructions
->append_list(&post_call_conversions
);
517 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
521 * Given a function name and parameter list, find the matching signature.
523 static ir_function_signature
*
524 match_function_by_name(const char *name
,
525 exec_list
*actual_parameters
,
526 struct _mesa_glsl_parse_state
*state
)
529 ir_function
*f
= state
->symbols
->get_function(name
);
530 ir_function_signature
*local_sig
= NULL
;
531 ir_function_signature
*sig
= NULL
;
533 /* Is the function hidden by a record type constructor? */
534 if (state
->symbols
->get_type(name
))
535 goto done
; /* no match */
537 /* Is the function hidden by a variable (impossible in 1.10)? */
538 if (!state
->symbols
->separate_function_namespace
539 && state
->symbols
->get_variable(name
))
540 goto done
; /* no match */
543 /* In desktop GL, the presence of a user-defined signature hides any
544 * built-in signatures, so we must ignore them. In contrast, in ES2
545 * user-defined signatures add new overloads, so we must consider them.
547 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
549 /* Look for a match in the local shader. If exact, we're done. */
550 bool is_exact
= false;
551 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
552 allow_builtins
, &is_exact
);
560 /* Local shader has no exact candidates; check the built-ins. */
561 _mesa_glsl_initialize_builtin_functions();
562 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
566 /* If the match is from a linked built-in shader, import the prototype. */
567 if (sig
!= local_sig
) {
569 f
= new(ctx
) ir_function(name
);
570 state
->symbols
->add_global_function(f
);
571 emit_function(state
, f
);
573 f
->add_signature(sig
->clone_prototype(f
, NULL
));
579 static ir_function_signature
*
580 match_subroutine_by_name(const char *name
,
581 exec_list
*actual_parameters
,
582 struct _mesa_glsl_parse_state
*state
,
586 ir_function_signature
*sig
= NULL
;
587 ir_function
*f
, *found
= NULL
;
588 const char *new_name
;
590 bool is_exact
= false;
592 new_name
= ralloc_asprintf(ctx
, "%s_%s", _mesa_shader_stage_to_subroutine_prefix(state
->stage
), name
);
593 var
= state
->symbols
->get_variable(new_name
);
597 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
598 f
= state
->subroutine_types
[i
];
599 if (strcmp(f
->name
, var
->type
->without_array()->name
))
608 sig
= found
->matching_signature(state
, actual_parameters
,
614 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
615 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
616 const ast_expression
*array
, ast_expression
*idx
,
617 const char **function_name
, exec_list
*actual_parameters
)
619 if (array
->oper
== ast_array_index
) {
620 /* This handles arrays of arrays */
621 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
623 array
->subexpressions
[0],
624 array
->subexpressions
[1],
625 function_name
, actual_parameters
);
626 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
628 YYLTYPE index_loc
= idx
->get_location();
629 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
630 outer_array_idx
, loc
,
633 ir_variable
*sub_var
= NULL
;
634 *function_name
= array
->primary_expression
.identifier
;
636 match_subroutine_by_name(*function_name
, actual_parameters
,
639 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
640 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
645 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
651 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
652 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
655 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
656 _mesa_glsl_error(loc
, state
, " %s", str
);
662 * Raise a "no matching function" error, listing all possible overloads the
663 * compiler considered so developers can figure out what went wrong.
666 no_matching_function_error(const char *name
,
668 exec_list
*actual_parameters
,
669 _mesa_glsl_parse_state
*state
)
671 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
673 if (state
->symbols
->get_function(name
) == NULL
674 && (!state
->uses_builtin_functions
675 || sh
->symbols
->get_function(name
) == NULL
)) {
676 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
678 char *str
= prototype_string(NULL
, name
, actual_parameters
);
679 _mesa_glsl_error(loc
, state
,
680 "no matching function for call to `%s'; candidates are:",
684 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
686 if (state
->uses_builtin_functions
) {
687 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
693 * Perform automatic type conversion of constructor parameters
695 * This implements the rules in the "Conversion and Scalar Constructors"
696 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
699 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
701 void *ctx
= ralloc_parent(src
);
702 const unsigned a
= desired_type
->base_type
;
703 const unsigned b
= src
->type
->base_type
;
704 ir_expression
*result
= NULL
;
706 if (src
->type
->is_error())
709 assert(a
<= GLSL_TYPE_BOOL
);
710 assert(b
<= GLSL_TYPE_BOOL
);
719 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
721 case GLSL_TYPE_FLOAT
:
722 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
725 result
= new(ctx
) ir_expression(ir_unop_i2u
,
726 new(ctx
) ir_expression(ir_unop_b2i
, src
));
728 case GLSL_TYPE_DOUBLE
:
729 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
736 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
738 case GLSL_TYPE_FLOAT
:
739 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
742 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
744 case GLSL_TYPE_DOUBLE
:
745 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
749 case GLSL_TYPE_FLOAT
:
752 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
755 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
758 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
760 case GLSL_TYPE_DOUBLE
:
761 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
768 result
= new(ctx
) ir_expression(ir_unop_i2b
,
769 new(ctx
) ir_expression(ir_unop_u2i
, src
));
772 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
774 case GLSL_TYPE_FLOAT
:
775 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
777 case GLSL_TYPE_DOUBLE
:
778 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
782 case GLSL_TYPE_DOUBLE
:
785 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
788 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
791 result
= new(ctx
) ir_expression(ir_unop_f2d
,
792 new(ctx
) ir_expression(ir_unop_b2f
, src
));
794 case GLSL_TYPE_FLOAT
:
795 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
800 assert(result
!= NULL
);
801 assert(result
->type
== desired_type
);
803 /* Try constant folding; it may fold in the conversion we just added. */
804 ir_constant
*const constant
= result
->constant_expression_value();
805 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
809 * Dereference a specific component from a scalar, vector, or matrix
812 dereference_component(ir_rvalue
*src
, unsigned component
)
814 void *ctx
= ralloc_parent(src
);
815 assert(component
< src
->type
->components());
817 /* If the source is a constant, just create a new constant instead of a
818 * dereference of the existing constant.
820 ir_constant
*constant
= src
->as_constant();
822 return new(ctx
) ir_constant(constant
, component
);
824 if (src
->type
->is_scalar()) {
826 } else if (src
->type
->is_vector()) {
827 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
829 assert(src
->type
->is_matrix());
831 /* Dereference a row of the matrix, then call this function again to get
832 * a specific element from that row.
834 const int c
= component
/ src
->type
->column_type()->vector_elements
;
835 const int r
= component
% src
->type
->column_type()->vector_elements
;
836 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
837 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
839 col
->type
= src
->type
->column_type();
841 return dereference_component(col
, r
);
844 assert(!"Should not get here.");
850 process_vec_mat_constructor(exec_list
*instructions
,
851 const glsl_type
*constructor_type
,
852 YYLTYPE
*loc
, exec_list
*parameters
,
853 struct _mesa_glsl_parse_state
*state
)
857 /* The ARB_shading_language_420pack spec says:
859 * "If an initializer is a list of initializers enclosed in curly braces,
860 * the variable being declared must be a vector, a matrix, an array, or a
863 * int i = { 1 }; // illegal, i is not an aggregate"
865 if (constructor_type
->vector_elements
<= 1) {
866 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
867 "matrices, arrays, and structs");
868 return ir_rvalue::error_value(ctx
);
871 exec_list actual_parameters
;
872 const unsigned parameter_count
=
873 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
875 if (parameter_count
== 0
876 || (constructor_type
->is_vector() &&
877 constructor_type
->vector_elements
!= parameter_count
)
878 || (constructor_type
->is_matrix() &&
879 constructor_type
->matrix_columns
!= parameter_count
)) {
880 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
881 constructor_type
->is_vector() ? "vector" : "matrix",
882 constructor_type
->vector_elements
);
883 return ir_rvalue::error_value(ctx
);
886 bool all_parameters_are_constant
= true;
888 /* Type cast each parameter and, if possible, fold constants. */
889 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
890 ir_rvalue
*result
= ir
;
892 /* Apply implicit conversions (not the scalar constructor rules!). See
893 * the spec quote above. */
894 if (constructor_type
->base_type
!= result
->type
->base_type
) {
895 const glsl_type
*desired_type
=
896 glsl_type::get_instance(constructor_type
->base_type
,
897 ir
->type
->vector_elements
,
898 ir
->type
->matrix_columns
);
899 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
900 /* Even though convert_component() implements the constructor
901 * conversion rules (not the implicit conversion rules), its safe
902 * to use it here because we already checked that the implicit
903 * conversion is legal.
905 result
= convert_component(ir
, desired_type
);
909 if (constructor_type
->is_matrix()) {
910 if (result
->type
!= constructor_type
->column_type()) {
911 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
912 "expected: %s, found %s",
913 constructor_type
->column_type()->name
,
915 return ir_rvalue::error_value(ctx
);
917 } else if (result
->type
!= constructor_type
->get_scalar_type()) {
918 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
919 "expected: %s, found %s",
920 constructor_type
->get_scalar_type()->name
,
922 return ir_rvalue::error_value(ctx
);
925 /* Attempt to convert the parameter to a constant valued expression.
926 * After doing so, track whether or not all the parameters to the
927 * constructor are trivially constant valued expressions.
929 ir_rvalue
*const constant
= result
->constant_expression_value();
931 if (constant
!= NULL
)
934 all_parameters_are_constant
= false;
936 ir
->replace_with(result
);
939 if (all_parameters_are_constant
)
940 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
942 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
944 instructions
->push_tail(var
);
948 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
949 ir_instruction
*assignment
= NULL
;
951 if (var
->type
->is_matrix()) {
952 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
953 new(ctx
) ir_constant(i
));
954 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
956 /* use writemask rather than index for vector */
957 assert(var
->type
->is_vector());
959 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
960 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
963 instructions
->push_tail(assignment
);
968 return new(ctx
) ir_dereference_variable(var
);
973 process_array_constructor(exec_list
*instructions
,
974 const glsl_type
*constructor_type
,
975 YYLTYPE
*loc
, exec_list
*parameters
,
976 struct _mesa_glsl_parse_state
*state
)
979 /* Array constructors come in two forms: sized and unsized. Sized array
980 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
981 * variables. In this case the number of parameters must exactly match the
982 * specified size of the array.
984 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
985 * are vec4 variables. In this case the size of the array being constructed
986 * is determined by the number of parameters.
988 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
990 * "There must be exactly the same number of arguments as the size of
991 * the array being constructed. If no size is present in the
992 * constructor, then the array is explicitly sized to the number of
993 * arguments provided. The arguments are assigned in order, starting at
994 * element 0, to the elements of the constructed array. Each argument
995 * must be the same type as the element type of the array, or be a type
996 * that can be converted to the element type of the array according to
997 * Section 4.1.10 "Implicit Conversions.""
999 exec_list actual_parameters
;
1000 const unsigned parameter_count
=
1001 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1002 bool is_unsized_array
= constructor_type
->is_unsized_array();
1004 if ((parameter_count
== 0) ||
1005 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1006 const unsigned min_param
= is_unsized_array
1007 ? 1 : constructor_type
->length
;
1009 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1011 is_unsized_array
? "at least" : "exactly",
1012 min_param
, (min_param
<= 1) ? "" : "s");
1013 return ir_rvalue::error_value(ctx
);
1016 if (is_unsized_array
) {
1018 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1020 assert(constructor_type
!= NULL
);
1021 assert(constructor_type
->length
== parameter_count
);
1024 bool all_parameters_are_constant
= true;
1025 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1027 /* Type cast each parameter and, if possible, fold constants. */
1028 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1029 ir_rvalue
*result
= ir
;
1031 const glsl_base_type element_base_type
=
1032 constructor_type
->fields
.array
->base_type
;
1034 /* Apply implicit conversions (not the scalar constructor rules!). See
1035 * the spec quote above. */
1036 if (element_base_type
!= result
->type
->base_type
) {
1037 const glsl_type
*desired_type
=
1038 glsl_type::get_instance(element_base_type
,
1039 ir
->type
->vector_elements
,
1040 ir
->type
->matrix_columns
);
1042 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1043 /* Even though convert_component() implements the constructor
1044 * conversion rules (not the implicit conversion rules), its safe
1045 * to use it here because we already checked that the implicit
1046 * conversion is legal.
1048 result
= convert_component(ir
, desired_type
);
1052 if (constructor_type
->fields
.array
->is_unsized_array()) {
1053 /* As the inner parameters of the constructor are created without
1054 * knowledge of each other we need to check to make sure unsized
1055 * parameters of unsized constructors all end up with the same size.
1057 * e.g we make sure to fail for a constructor like this:
1058 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1059 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1060 * vec4[](vec4(0.0), vec4(1.0)));
1062 if (element_type
->is_unsized_array()) {
1063 /* This is the first parameter so just get the type */
1064 element_type
= result
->type
;
1065 } else if (element_type
!= result
->type
) {
1066 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1067 "expected: %s, found %s",
1069 result
->type
->name
);
1070 return ir_rvalue::error_value(ctx
);
1072 } else if (result
->type
!= constructor_type
->fields
.array
) {
1073 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1074 "expected: %s, found %s",
1075 constructor_type
->fields
.array
->name
,
1076 result
->type
->name
);
1077 return ir_rvalue::error_value(ctx
);
1079 element_type
= result
->type
;
1082 /* Attempt to convert the parameter to a constant valued expression.
1083 * After doing so, track whether or not all the parameters to the
1084 * constructor are trivially constant valued expressions.
1086 ir_rvalue
*const constant
= result
->constant_expression_value();
1088 if (constant
!= NULL
)
1091 all_parameters_are_constant
= false;
1093 ir
->replace_with(result
);
1096 if (constructor_type
->fields
.array
->is_unsized_array()) {
1098 glsl_type::get_array_instance(element_type
,
1100 assert(constructor_type
!= NULL
);
1101 assert(constructor_type
->length
== parameter_count
);
1104 if (all_parameters_are_constant
)
1105 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1107 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1109 instructions
->push_tail(var
);
1112 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1113 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1114 new(ctx
) ir_constant(i
));
1116 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1117 instructions
->push_tail(assignment
);
1122 return new(ctx
) ir_dereference_variable(var
);
1127 * Try to convert a record constructor to a constant expression
1129 static ir_constant
*
1130 constant_record_constructor(const glsl_type
*constructor_type
,
1131 exec_list
*parameters
, void *mem_ctx
)
1133 foreach_in_list(ir_instruction
, node
, parameters
) {
1134 ir_constant
*constant
= node
->as_constant();
1135 if (constant
== NULL
)
1137 node
->replace_with(constant
);
1140 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
1145 * Determine if a list consists of a single scalar r-value
1148 single_scalar_parameter(exec_list
*parameters
)
1150 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
1151 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1153 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1158 * Generate inline code for a vector constructor
1160 * The generated constructor code will consist of a temporary variable
1161 * declaration of the same type as the constructor. A sequence of assignments
1162 * from constructor parameters to the temporary will follow.
1165 * An \c ir_dereference_variable of the temprorary generated in the constructor
1169 emit_inline_vector_constructor(const glsl_type
*type
,
1170 exec_list
*instructions
,
1171 exec_list
*parameters
,
1174 assert(!parameters
->is_empty());
1176 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1177 instructions
->push_tail(var
);
1179 /* There are three kinds of vector constructors.
1181 * - Construct a vector from a single scalar by replicating that scalar to
1182 * all components of the vector.
1184 * - Construct a vector from at least a matrix. This case should already
1185 * have been taken care of in ast_function_expression::hir by breaking
1186 * down the matrix into a series of column vectors.
1188 * - Construct a vector from an arbirary combination of vectors and
1189 * scalars. The components of the constructor parameters are assigned
1190 * to the vector in order until the vector is full.
1192 const unsigned lhs_components
= type
->components();
1193 if (single_scalar_parameter(parameters
)) {
1194 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
1195 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1197 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1198 const unsigned mask
= (1U << lhs_components
) - 1;
1200 assert(rhs
->type
== lhs
->type
);
1202 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1203 instructions
->push_tail(inst
);
1205 unsigned base_component
= 0;
1206 unsigned base_lhs_component
= 0;
1207 ir_constant_data data
;
1208 unsigned constant_mask
= 0, constant_components
= 0;
1210 memset(&data
, 0, sizeof(data
));
1212 foreach_in_list(ir_rvalue
, param
, parameters
) {
1213 unsigned rhs_components
= param
->type
->components();
1215 /* Do not try to assign more components to the vector than it has!
1217 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1218 rhs_components
= lhs_components
- base_lhs_component
;
1221 const ir_constant
*const c
= param
->as_constant();
1223 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1224 switch (c
->type
->base_type
) {
1225 case GLSL_TYPE_UINT
:
1226 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1229 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1231 case GLSL_TYPE_FLOAT
:
1232 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1234 case GLSL_TYPE_DOUBLE
:
1235 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1237 case GLSL_TYPE_BOOL
:
1238 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1241 assert(!"Should not get here.");
1246 /* Mask of fields to be written in the assignment.
1248 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1249 constant_components
+= rhs_components
;
1251 base_component
+= rhs_components
;
1253 /* Advance the component index by the number of components
1254 * that were just assigned.
1256 base_lhs_component
+= rhs_components
;
1259 if (constant_mask
!= 0) {
1260 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1261 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1262 constant_components
,
1264 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1266 ir_instruction
*inst
=
1267 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1268 instructions
->push_tail(inst
);
1272 foreach_in_list(ir_rvalue
, param
, parameters
) {
1273 unsigned rhs_components
= param
->type
->components();
1275 /* Do not try to assign more components to the vector than it has!
1277 if ((rhs_components
+ base_component
) > lhs_components
) {
1278 rhs_components
= lhs_components
- base_component
;
1281 /* If we do not have any components left to copy, break out of the
1282 * loop. This can happen when initializing a vec4 with a mat3 as the
1283 * mat3 would have been broken into a series of column vectors.
1285 if (rhs_components
== 0) {
1289 const ir_constant
*const c
= param
->as_constant();
1291 /* Mask of fields to be written in the assignment.
1293 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1296 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1298 /* Generate a swizzle so that LHS and RHS sizes match.
1301 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1303 ir_instruction
*inst
=
1304 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1305 instructions
->push_tail(inst
);
1308 /* Advance the component index by the number of components that were
1311 base_component
+= rhs_components
;
1314 return new(ctx
) ir_dereference_variable(var
);
1319 * Generate assignment of a portion of a vector to a portion of a matrix column
1321 * \param src_base First component of the source to be used in assignment
1322 * \param column Column of destination to be assiged
1323 * \param row_base First component of the destination column to be assigned
1324 * \param count Number of components to be assigned
1327 * \c src_base + \c count must be less than or equal to the number of components
1328 * in the source vector.
1331 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1332 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1335 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1336 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1338 assert(column_ref
->type
->components() >= (row_base
+ count
));
1339 assert(src
->type
->components() >= (src_base
+ count
));
1341 /* Generate a swizzle that extracts the number of components from the source
1342 * that are to be assigned to the column of the matrix.
1344 if (count
< src
->type
->vector_elements
) {
1345 src
= new(mem_ctx
) ir_swizzle(src
,
1346 src_base
+ 0, src_base
+ 1,
1347 src_base
+ 2, src_base
+ 3,
1351 /* Mask of fields to be written in the assignment.
1353 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1355 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1360 * Generate inline code for a matrix constructor
1362 * The generated constructor code will consist of a temporary variable
1363 * declaration of the same type as the constructor. A sequence of assignments
1364 * from constructor parameters to the temporary will follow.
1367 * An \c ir_dereference_variable of the temprorary generated in the constructor
1371 emit_inline_matrix_constructor(const glsl_type
*type
,
1372 exec_list
*instructions
,
1373 exec_list
*parameters
,
1376 assert(!parameters
->is_empty());
1378 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1379 instructions
->push_tail(var
);
1381 /* There are three kinds of matrix constructors.
1383 * - Construct a matrix from a single scalar by replicating that scalar to
1384 * along the diagonal of the matrix and setting all other components to
1387 * - Construct a matrix from an arbirary combination of vectors and
1388 * scalars. The components of the constructor parameters are assigned
1389 * to the matrix in column-major order until the matrix is full.
1391 * - Construct a matrix from a single matrix. The source matrix is copied
1392 * to the upper left portion of the constructed matrix, and the remaining
1393 * elements take values from the identity matrix.
1395 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
1396 if (single_scalar_parameter(parameters
)) {
1397 /* Assign the scalar to the X component of a vec4, and fill the remaining
1398 * components with zero.
1400 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1401 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1402 param_base_type
== GLSL_TYPE_DOUBLE
);
1403 ir_variable
*rhs_var
=
1404 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1407 instructions
->push_tail(rhs_var
);
1409 ir_constant_data zero
;
1410 for (unsigned i
= 0; i
< 4; i
++)
1411 if (param_base_type
== GLSL_TYPE_FLOAT
)
1416 ir_instruction
*inst
=
1417 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1418 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1420 instructions
->push_tail(inst
);
1422 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1424 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1425 instructions
->push_tail(inst
);
1427 /* Assign the temporary vector to each column of the destination matrix
1428 * with a swizzle that puts the X component on the diagonal of the
1429 * matrix. In some cases this may mean that the X component does not
1430 * get assigned into the column at all (i.e., when the matrix has more
1431 * columns than rows).
1433 static const unsigned rhs_swiz
[4][4] = {
1440 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1441 type
->vector_elements
);
1442 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1443 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1444 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1446 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1447 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1448 type
->vector_elements
);
1450 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1451 instructions
->push_tail(inst
);
1454 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1455 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1456 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1458 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1459 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1460 type
->vector_elements
);
1462 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1463 instructions
->push_tail(inst
);
1465 } else if (first_param
->type
->is_matrix()) {
1466 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1468 * "If a matrix is constructed from a matrix, then each component
1469 * (column i, row j) in the result that has a corresponding
1470 * component (column i, row j) in the argument will be initialized
1471 * from there. All other components will be initialized to the
1472 * identity matrix. If a matrix argument is given to a matrix
1473 * constructor, it is an error to have any other arguments."
1475 assert(first_param
->next
->is_tail_sentinel());
1476 ir_rvalue
*const src_matrix
= first_param
;
1478 /* If the source matrix is smaller, pre-initialize the relavent parts of
1479 * the destination matrix to the identity matrix.
1481 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
1482 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1484 /* If the source matrix has fewer rows, every column of the destination
1485 * must be initialized. Otherwise only the columns in the destination
1486 * that do not exist in the source must be initialized.
1489 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1490 ? 0 : src_matrix
->type
->matrix_columns
;
1492 const glsl_type
*const col_type
= var
->type
->column_type();
1493 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1494 ir_constant_data ident
;
1503 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1505 ir_rvalue
*const lhs
=
1506 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1508 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1509 instructions
->push_tail(inst
);
1513 /* Assign columns from the source matrix to the destination matrix.
1515 * Since the parameter will be used in the RHS of multiple assignments,
1516 * generate a temporary and copy the paramter there.
1518 ir_variable
*const rhs_var
=
1519 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1521 instructions
->push_tail(rhs_var
);
1523 ir_dereference
*const rhs_var_ref
=
1524 new(ctx
) ir_dereference_variable(rhs_var
);
1525 ir_instruction
*const inst
=
1526 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1527 instructions
->push_tail(inst
);
1529 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1530 var
->type
->vector_elements
);
1531 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1532 var
->type
->matrix_columns
);
1534 unsigned swiz
[4] = { 0, 0, 0, 0 };
1535 for (unsigned i
= 1; i
< last_row
; i
++)
1538 const unsigned write_mask
= (1U << last_row
) - 1;
1540 for (unsigned i
= 0; i
< last_col
; i
++) {
1541 ir_dereference
*const lhs
=
1542 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1543 ir_rvalue
*const rhs_col
=
1544 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1546 /* If one matrix has columns that are smaller than the columns of the
1547 * other matrix, wrap the column access of the larger with a swizzle
1548 * so that the LHS and RHS of the assignment have the same size (and
1549 * therefore have the same type).
1551 * It would be perfectly valid to unconditionally generate the
1552 * swizzles, this this will typically result in a more compact IR tree.
1555 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1556 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1561 ir_instruction
*inst
=
1562 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1563 instructions
->push_tail(inst
);
1566 const unsigned cols
= type
->matrix_columns
;
1567 const unsigned rows
= type
->vector_elements
;
1568 unsigned remaining_slots
= rows
* cols
;
1569 unsigned col_idx
= 0;
1570 unsigned row_idx
= 0;
1572 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1573 unsigned rhs_components
= rhs
->type
->components();
1574 unsigned rhs_base
= 0;
1576 if (remaining_slots
== 0)
1579 /* Since the parameter might be used in the RHS of two assignments,
1580 * generate a temporary and copy the paramter there.
1582 ir_variable
*rhs_var
=
1583 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1584 instructions
->push_tail(rhs_var
);
1586 ir_dereference
*rhs_var_ref
=
1587 new(ctx
) ir_dereference_variable(rhs_var
);
1588 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1589 instructions
->push_tail(inst
);
1592 /* Assign the current parameter to as many components of the matrix
1595 * NOTE: A single vector parameter can span two matrix columns. A
1596 * single vec4, for example, can completely fill a mat2.
1598 unsigned count
= MIN2(rows
- row_idx
,
1599 rhs_components
- rhs_base
);
1601 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1602 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1607 instructions
->push_tail(inst
);
1610 remaining_slots
-= count
;
1612 /* Sometimes, there is still data left in the parameters and
1613 * components left to be set in the destination but in other
1616 if (row_idx
>= rows
) {
1620 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1624 return new(ctx
) ir_dereference_variable(var
);
1629 emit_inline_record_constructor(const glsl_type
*type
,
1630 exec_list
*instructions
,
1631 exec_list
*parameters
,
1634 ir_variable
*const var
=
1635 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1636 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1638 instructions
->push_tail(var
);
1640 exec_node
*node
= parameters
->head
;
1641 for (unsigned i
= 0; i
< type
->length
; i
++) {
1642 assert(!node
->is_tail_sentinel());
1644 ir_dereference
*const lhs
=
1645 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1646 type
->fields
.structure
[i
].name
);
1648 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1649 assert(rhs
!= NULL
);
1651 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1653 instructions
->push_tail(assign
);
1662 process_record_constructor(exec_list
*instructions
,
1663 const glsl_type
*constructor_type
,
1664 YYLTYPE
*loc
, exec_list
*parameters
,
1665 struct _mesa_glsl_parse_state
*state
)
1668 exec_list actual_parameters
;
1670 process_parameters(instructions
, &actual_parameters
,
1673 exec_node
*node
= actual_parameters
.head
;
1674 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1675 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1677 if (node
->is_tail_sentinel()) {
1678 _mesa_glsl_error(loc
, state
,
1679 "insufficient parameters to constructor for `%s'",
1680 constructor_type
->name
);
1681 return ir_rvalue::error_value(ctx
);
1684 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1686 node
->replace_with(ir
);
1688 _mesa_glsl_error(loc
, state
,
1689 "parameter type mismatch in constructor for `%s.%s' "
1691 constructor_type
->name
,
1692 constructor_type
->fields
.structure
[i
].name
,
1694 constructor_type
->fields
.structure
[i
].type
->name
);
1695 return ir_rvalue::error_value(ctx
);;
1701 if (!node
->is_tail_sentinel()) {
1702 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1703 "for `%s'", constructor_type
->name
);
1704 return ir_rvalue::error_value(ctx
);
1707 ir_rvalue
*const constant
=
1708 constant_record_constructor(constructor_type
, &actual_parameters
,
1711 return (constant
!= NULL
)
1713 : emit_inline_record_constructor(constructor_type
, instructions
,
1714 &actual_parameters
, state
);
1718 ast_function_expression::handle_method(exec_list
*instructions
,
1719 struct _mesa_glsl_parse_state
*state
)
1721 const ast_expression
*field
= subexpressions
[0];
1725 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1726 YYLTYPE loc
= get_location();
1727 state
->check_version(120, 300, &loc
, "methods not supported");
1730 method
= field
->primary_expression
.identifier
;
1732 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1733 if (strcmp(method
, "length") == 0) {
1734 if (!this->expressions
.is_empty()) {
1735 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1739 if (op
->type
->is_array()) {
1740 if (op
->type
->is_unsized_array()) {
1741 if (!state
->has_shader_storage_buffer_objects()) {
1742 _mesa_glsl_error(&loc
, state
, "length called on unsized array"
1743 " only available with "
1744 "ARB_shader_storage_buffer_object");
1746 /* Calculate length of an unsized array in run-time */
1747 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
, op
);
1749 result
= new(ctx
) ir_constant(op
->type
->array_size());
1751 } else if (op
->type
->is_vector()) {
1752 if (state
->ARB_shading_language_420pack_enable
) {
1753 /* .length() returns int. */
1754 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1756 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1757 "with ARB_shading_language_420pack");
1760 } else if (op
->type
->is_matrix()) {
1761 if (state
->ARB_shading_language_420pack_enable
) {
1762 /* .length() returns int. */
1763 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1765 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1766 "with ARB_shading_language_420pack");
1770 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1774 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1779 return ir_rvalue::error_value(ctx
);
1783 ast_function_expression::hir(exec_list
*instructions
,
1784 struct _mesa_glsl_parse_state
*state
)
1787 /* There are three sorts of function calls.
1789 * 1. constructors - The first subexpression is an ast_type_specifier.
1790 * 2. methods - Only the .length() method of array types.
1791 * 3. functions - Calls to regular old functions.
1794 if (is_constructor()) {
1795 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1796 YYLTYPE loc
= type
->get_location();
1799 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1801 /* constructor_type can be NULL if a variable with the same name as the
1802 * structure has come into scope.
1804 if (constructor_type
== NULL
) {
1805 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1806 "may be shadowed by a variable with the same name)",
1808 return ir_rvalue::error_value(ctx
);
1812 /* Constructors for opaque types are illegal.
1814 if (constructor_type
->contains_opaque()) {
1815 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1816 constructor_type
->name
);
1817 return ir_rvalue::error_value(ctx
);
1820 if (constructor_type
->is_array()) {
1821 if (!state
->check_version(120, 300, &loc
,
1822 "array constructors forbidden")) {
1823 return ir_rvalue::error_value(ctx
);
1826 return process_array_constructor(instructions
, constructor_type
,
1827 & loc
, &this->expressions
, state
);
1831 /* There are two kinds of constructor calls. Constructors for arrays and
1832 * structures must have the exact number of arguments with matching types
1833 * in the correct order. These constructors follow essentially the same
1834 * type matching rules as functions.
1836 * Constructors for built-in language types, such as mat4 and vec2, are
1837 * free form. The only requirements are that the parameters must provide
1838 * enough values of the correct scalar type and that no arguments are
1839 * given past the last used argument.
1841 * When using the C-style initializer syntax from GLSL 4.20, constructors
1842 * must have the exact number of arguments with matching types in the
1845 if (constructor_type
->is_record()) {
1846 return process_record_constructor(instructions
, constructor_type
,
1847 &loc
, &this->expressions
,
1851 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1852 return ir_rvalue::error_value(ctx
);
1854 /* Total number of components of the type being constructed. */
1855 const unsigned type_components
= constructor_type
->components();
1857 /* Number of components from parameters that have actually been
1858 * consumed. This is used to perform several kinds of error checking.
1860 unsigned components_used
= 0;
1862 unsigned matrix_parameters
= 0;
1863 unsigned nonmatrix_parameters
= 0;
1864 exec_list actual_parameters
;
1866 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1867 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1869 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1871 * "It is an error to provide extra arguments beyond this
1872 * last used argument."
1874 if (components_used
>= type_components
) {
1875 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1877 constructor_type
->name
);
1878 return ir_rvalue::error_value(ctx
);
1881 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1882 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1883 "non-numeric data type",
1884 constructor_type
->name
);
1885 return ir_rvalue::error_value(ctx
);
1888 /* Count the number of matrix and nonmatrix parameters. This
1889 * is used below to enforce some of the constructor rules.
1891 if (result
->type
->is_matrix())
1892 matrix_parameters
++;
1894 nonmatrix_parameters
++;
1896 actual_parameters
.push_tail(result
);
1897 components_used
+= result
->type
->components();
1900 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1902 * "It is an error to construct matrices from other matrices. This
1903 * is reserved for future use."
1905 if (matrix_parameters
> 0
1906 && constructor_type
->is_matrix()
1907 && !state
->check_version(120, 100, &loc
,
1908 "cannot construct `%s' from a matrix",
1909 constructor_type
->name
)) {
1910 return ir_rvalue::error_value(ctx
);
1913 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1915 * "If a matrix argument is given to a matrix constructor, it is
1916 * an error to have any other arguments."
1918 if ((matrix_parameters
> 0)
1919 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1920 && constructor_type
->is_matrix()) {
1921 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1922 "matrix must be only parameter",
1923 constructor_type
->name
);
1924 return ir_rvalue::error_value(ctx
);
1927 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1929 * "In these cases, there must be enough components provided in the
1930 * arguments to provide an initializer for every component in the
1931 * constructed value."
1933 if (components_used
< type_components
&& components_used
!= 1
1934 && matrix_parameters
== 0) {
1935 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1937 constructor_type
->name
);
1938 return ir_rvalue::error_value(ctx
);
1941 /* Matrices can never be consumed as is by any constructor but matrix
1942 * constructors. If the constructor type is not matrix, always break the
1943 * matrix up into a series of column vectors.
1945 if (!constructor_type
->is_matrix()) {
1946 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
1947 if (!matrix
->type
->is_matrix())
1950 /* Create a temporary containing the matrix. */
1951 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1953 instructions
->push_tail(var
);
1954 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1955 ir_dereference_variable(var
), matrix
, NULL
));
1956 var
->constant_value
= matrix
->constant_expression_value();
1958 /* Replace the matrix with dereferences of its columns. */
1959 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1960 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1961 new(ctx
) ir_constant(i
)));
1967 bool all_parameters_are_constant
= true;
1969 /* Type cast each parameter and, if possible, fold constants.*/
1970 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1971 const glsl_type
*desired_type
=
1972 glsl_type::get_instance(constructor_type
->base_type
,
1973 ir
->type
->vector_elements
,
1974 ir
->type
->matrix_columns
);
1975 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1977 /* Attempt to convert the parameter to a constant valued expression.
1978 * After doing so, track whether or not all the parameters to the
1979 * constructor are trivially constant valued expressions.
1981 ir_rvalue
*const constant
= result
->constant_expression_value();
1983 if (constant
!= NULL
)
1986 all_parameters_are_constant
= false;
1989 ir
->replace_with(result
);
1993 /* If all of the parameters are trivially constant, create a
1994 * constant representing the complete collection of parameters.
1996 if (all_parameters_are_constant
) {
1997 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1998 } else if (constructor_type
->is_scalar()) {
1999 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
2001 } else if (constructor_type
->is_vector()) {
2002 return emit_inline_vector_constructor(constructor_type
,
2007 assert(constructor_type
->is_matrix());
2008 return emit_inline_matrix_constructor(constructor_type
,
2013 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2014 return handle_method(instructions
, state
);
2016 const ast_expression
*id
= subexpressions
[0];
2017 const char *func_name
;
2018 YYLTYPE loc
= get_location();
2019 exec_list actual_parameters
;
2020 ir_variable
*sub_var
= NULL
;
2021 ir_rvalue
*array_idx
= NULL
;
2023 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2026 if (id
->oper
== ast_array_index
) {
2027 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2028 id
->subexpressions
[0],
2029 id
->subexpressions
[1], &func_name
,
2030 &actual_parameters
);
2032 func_name
= id
->primary_expression
.identifier
;
2035 ir_function_signature
*sig
=
2036 match_function_by_name(func_name
, &actual_parameters
, state
);
2038 ir_rvalue
*value
= NULL
;
2040 sig
= match_subroutine_by_name(func_name
, &actual_parameters
, state
, &sub_var
);
2044 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
2045 value
= ir_rvalue::error_value(ctx
);
2046 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
2047 /* an error has already been emitted */
2048 value
= ir_rvalue::error_value(ctx
);
2050 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
, array_idx
, state
);
2052 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2055 instructions
->push_tail(tmp
);
2056 value
= new(ctx
) ir_dereference_variable(tmp
);
2063 unreachable("not reached");
2067 ast_function_expression::has_sequence_subexpression() const
2069 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2070 if (ast
->has_sequence_subexpression())
2078 ast_aggregate_initializer::hir(exec_list
*instructions
,
2079 struct _mesa_glsl_parse_state
*state
)
2082 YYLTYPE loc
= this->get_location();
2084 if (!this->constructor_type
) {
2085 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2086 return ir_rvalue::error_value(ctx
);
2088 const glsl_type
*const constructor_type
= this->constructor_type
;
2090 if (!state
->ARB_shading_language_420pack_enable
) {
2091 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2092 "GL_ARB_shading_language_420pack extension");
2093 return ir_rvalue::error_value(ctx
);
2096 if (constructor_type
->is_array()) {
2097 return process_array_constructor(instructions
, constructor_type
, &loc
,
2098 &this->expressions
, state
);
2101 if (constructor_type
->is_record()) {
2102 return process_record_constructor(instructions
, constructor_type
, &loc
,
2103 &this->expressions
, state
);
2106 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2107 &this->expressions
, state
);