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"
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 /* We need to process the parameters first in order to know if we can
47 * raise or not a unitialized warning. Calling set_is_lhs silence the
48 * warning for now. Raising the warning or not will be checked at
49 * verify_parameter_modes.
51 ast
->set_is_lhs(true);
52 ir_rvalue
*result
= ast
->hir(instructions
, state
);
54 ir_constant
*const constant
= result
->constant_expression_value();
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
.image_coherent
&& !formal
->data
.image_coherent
) {
114 _mesa_glsl_error(loc
, state
,
115 "function call parameter `%s' drops "
116 "`coherent' qualifier", formal
->name
);
120 if (actual
->data
.image_volatile
&& !formal
->data
.image_volatile
) {
121 _mesa_glsl_error(loc
, state
,
122 "function call parameter `%s' drops "
123 "`volatile' qualifier", formal
->name
);
127 if (actual
->data
.image_restrict
&& !formal
->data
.image_restrict
) {
128 _mesa_glsl_error(loc
, state
,
129 "function call parameter `%s' drops "
130 "`restrict' qualifier", formal
->name
);
134 if (actual
->data
.image_read_only
&& !formal
->data
.image_read_only
) {
135 _mesa_glsl_error(loc
, state
,
136 "function call parameter `%s' drops "
137 "`readonly' qualifier", formal
->name
);
141 if (actual
->data
.image_write_only
&& !formal
->data
.image_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",
243 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
244 if (formal
->data
.mode
== ir_var_function_out
245 || formal
->data
.mode
== ir_var_function_inout
) {
246 const char *mode
= NULL
;
247 switch (formal
->data
.mode
) {
248 case ir_var_function_out
: mode
= "out"; break;
249 case ir_var_function_inout
: mode
= "inout"; break;
250 default: assert(false); break;
253 /* This AST-based check catches errors like f(i++). The IR-based
254 * is_lvalue() is insufficient because the actual parameter at the
255 * IR-level is just a temporary value, which is an l-value.
257 if (actual_ast
->non_lvalue_description
!= NULL
) {
258 _mesa_glsl_error(&loc
, state
,
259 "function parameter '%s %s' references a %s",
261 actual_ast
->non_lvalue_description
);
265 ir_variable
*var
= actual
->variable_referenced();
267 if (var
&& formal
->data
.mode
== ir_var_function_inout
) {
268 if ((var
->data
.mode
== ir_var_auto
|| var
->data
.mode
== ir_var_shader_out
) &&
269 !var
->data
.assigned
&&
270 !is_gl_identifier(var
->name
)) {
271 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
277 var
->data
.assigned
= true;
279 if (var
&& var
->data
.read_only
) {
280 _mesa_glsl_error(&loc
, state
,
281 "function parameter '%s %s' references the "
282 "read-only variable '%s'",
284 actual
->variable_referenced()->name
);
286 } else if (!actual
->is_lvalue()) {
287 _mesa_glsl_error(&loc
, state
,
288 "function parameter '%s %s' is not an lvalue",
293 assert(formal
->data
.mode
== ir_var_function_in
||
294 formal
->data
.mode
== ir_var_const_in
);
295 ir_variable
*var
= actual
->variable_referenced();
297 if ((var
->data
.mode
== ir_var_auto
|| var
->data
.mode
== ir_var_shader_out
) &&
298 !var
->data
.assigned
&&
299 !is_gl_identifier(var
->name
)) {
300 _mesa_glsl_warning(&loc
, state
, "`%s' used uninitialized",
306 if (formal
->type
->is_image() &&
307 actual
->variable_referenced()) {
308 if (!verify_image_parameter(&loc
, state
, formal
,
309 actual
->variable_referenced()))
313 actual_ir_node
= actual_ir_node
->next
;
314 actual_ast_node
= actual_ast_node
->next
;
317 /* The first parameter of atomic functions must be a buffer variable */
318 const char *func_name
= sig
->function_name();
319 bool is_atomic
= is_atomic_function(func_name
);
321 const ir_rvalue
*const actual
=
322 (ir_rvalue
*) actual_ir_parameters
.get_head_raw();
324 const ast_expression
*const actual_ast
=
325 exec_node_data(ast_expression
,
326 actual_ast_parameters
.get_head_raw(), link
);
327 YYLTYPE loc
= actual_ast
->get_location();
329 if (!verify_first_atomic_parameter(&loc
, state
,
330 actual
->variable_referenced())) {
339 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
340 exec_list
*before_instructions
, exec_list
*after_instructions
,
341 bool parameter_is_inout
)
343 ir_expression
*const expr
= actual
->as_expression();
345 /* If the types match exactly and the parameter is not a vector-extract,
346 * nothing needs to be done to fix the parameter.
348 if (formal_type
== actual
->type
349 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
352 /* To convert an out parameter, we need to create a temporary variable to
353 * hold the value before conversion, and then perform the conversion after
354 * the function call returns.
356 * This has the effect of transforming code like this:
362 * Into IR that's equivalent to this:
366 * int out_parameter_conversion;
367 * f(out_parameter_conversion);
368 * value = float(out_parameter_conversion);
370 * If the parameter is an ir_expression of ir_binop_vector_extract,
371 * additional conversion is needed in the post-call re-write.
374 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
376 before_instructions
->push_tail(tmp
);
378 /* If the parameter is an inout parameter, copy the value of the actual
379 * parameter to the new temporary. Note that no type conversion is allowed
380 * here because inout parameters must match types exactly.
382 if (parameter_is_inout
) {
383 /* Inout parameters should never require conversion, since that would
384 * require an implicit conversion to exist both to and from the formal
385 * parameter type, and there are no bidirectional implicit conversions.
387 assert (actual
->type
== formal_type
);
389 ir_dereference_variable
*const deref_tmp_1
=
390 new(mem_ctx
) ir_dereference_variable(tmp
);
391 ir_assignment
*const assignment
=
392 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
393 before_instructions
->push_tail(assignment
);
396 /* Replace the parameter in the call with a dereference of the new
399 ir_dereference_variable
*const deref_tmp_2
=
400 new(mem_ctx
) ir_dereference_variable(tmp
);
401 actual
->replace_with(deref_tmp_2
);
404 /* Copy the temporary variable to the actual parameter with optional
405 * type conversion applied.
407 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
408 if (actual
->type
!= formal_type
)
409 rhs
= convert_component(rhs
, actual
->type
);
411 ir_rvalue
*lhs
= actual
;
412 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
413 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
, NULL
),
414 expr
->operands
[1]->clone(mem_ctx
, NULL
));
417 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
418 after_instructions
->push_tail(assignment_2
);
422 * Generate a function call.
424 * For non-void functions, this returns a dereference of the temporary variable
425 * which stores the return value for the call. For void functions, this returns
429 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
430 exec_list
*actual_parameters
,
431 ir_variable
*sub_var
,
432 ir_rvalue
*array_idx
,
433 struct _mesa_glsl_parse_state
*state
)
436 exec_list post_call_conversions
;
438 /* Perform implicit conversion of arguments. For out parameters, we need
439 * to place them in a temporary variable and do the conversion after the
440 * call takes place. Since we haven't emitted the call yet, we'll place
441 * the post-call conversions in a temporary exec_list, and emit them later.
443 foreach_two_lists(formal_node
, &sig
->parameters
,
444 actual_node
, actual_parameters
) {
445 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
446 ir_variable
*formal
= (ir_variable
*) formal_node
;
448 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
449 switch (formal
->data
.mode
) {
450 case ir_var_const_in
:
451 case ir_var_function_in
: {
453 = convert_component(actual
, formal
->type
);
454 actual
->replace_with(converted
);
457 case ir_var_function_out
:
458 case ir_var_function_inout
:
459 fix_parameter(ctx
, actual
, formal
->type
,
460 instructions
, &post_call_conversions
,
461 formal
->data
.mode
== ir_var_function_inout
);
464 assert (!"Illegal formal parameter mode");
470 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
472 * "Initializers for const declarations must be formed from literal
473 * values, other const variables (not including function call
474 * paramaters), or expressions of these.
476 * Constructors may be used in such expressions, but function calls may
479 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
481 * "A constant expression is one of
485 * - a built-in function call whose arguments are all constant
486 * expressions, with the exception of the texture lookup
487 * functions, the noise functions, and ftransform. The built-in
488 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
489 * inside an initializer with an argument that is a constant
492 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
494 * "A constant expression is one of
498 * - a built-in function call whose arguments are all constant
499 * expressions, with the exception of the texture lookup
502 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
504 * "A constant expression is one of
508 * - a built-in function call whose arguments are all constant
509 * expressions, with the exception of the texture lookup
510 * functions. The built-in functions dFdx, dFdy, and fwidth must
511 * return 0 when evaluated inside an initializer with an argument
512 * that is a constant expression."
514 * If the function call is a constant expression, don't generate any
515 * instructions; just generate an ir_constant.
517 if (state
->is_version(120, 100)) {
518 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
524 ir_dereference_variable
*deref
= NULL
;
525 if (!sig
->return_type
->is_void()) {
526 /* Create a new temporary to hold the return value. */
527 char *const name
= ir_variable::temporaries_allocate_names
528 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
533 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
534 instructions
->push_tail(var
);
538 deref
= new(ctx
) ir_dereference_variable(var
);
541 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
, sub_var
, array_idx
);
542 instructions
->push_tail(call
);
544 /* Also emit any necessary out-parameter conversions. */
545 instructions
->append_list(&post_call_conversions
);
547 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
551 * Given a function name and parameter list, find the matching signature.
553 static ir_function_signature
*
554 match_function_by_name(const char *name
,
555 exec_list
*actual_parameters
,
556 struct _mesa_glsl_parse_state
*state
)
559 ir_function
*f
= state
->symbols
->get_function(name
);
560 ir_function_signature
*local_sig
= NULL
;
561 ir_function_signature
*sig
= NULL
;
563 /* Is the function hidden by a record type constructor? */
564 if (state
->symbols
->get_type(name
))
565 goto done
; /* no match */
567 /* Is the function hidden by a variable (impossible in 1.10)? */
568 if (!state
->symbols
->separate_function_namespace
569 && state
->symbols
->get_variable(name
))
570 goto done
; /* no match */
573 /* In desktop GL, the presence of a user-defined signature hides any
574 * built-in signatures, so we must ignore them. In contrast, in ES2
575 * user-defined signatures add new overloads, so we must consider them.
577 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
579 /* Look for a match in the local shader. If exact, we're done. */
580 bool is_exact
= false;
581 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
582 allow_builtins
, &is_exact
);
590 /* Local shader has no exact candidates; check the built-ins. */
591 _mesa_glsl_initialize_builtin_functions();
592 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
596 /* If the match is from a linked built-in shader, import the prototype. */
597 if (sig
!= local_sig
) {
599 f
= new(ctx
) ir_function(name
);
600 state
->symbols
->add_global_function(f
);
601 emit_function(state
, f
);
603 sig
= sig
->clone_prototype(f
, NULL
);
604 f
->add_signature(sig
);
610 static ir_function_signature
*
611 match_subroutine_by_name(const char *name
,
612 exec_list
*actual_parameters
,
613 struct _mesa_glsl_parse_state
*state
,
617 ir_function_signature
*sig
= NULL
;
618 ir_function
*f
, *found
= NULL
;
619 const char *new_name
;
621 bool is_exact
= false;
623 new_name
= ralloc_asprintf(ctx
, "%s_%s", _mesa_shader_stage_to_subroutine_prefix(state
->stage
), name
);
624 var
= state
->symbols
->get_variable(new_name
);
628 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
629 f
= state
->subroutine_types
[i
];
630 if (strcmp(f
->name
, var
->type
->without_array()->name
))
639 sig
= found
->matching_signature(state
, actual_parameters
,
645 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
646 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
647 const ast_expression
*array
, ast_expression
*idx
,
648 const char **function_name
, exec_list
*actual_parameters
)
650 if (array
->oper
== ast_array_index
) {
651 /* This handles arrays of arrays */
652 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
654 array
->subexpressions
[0],
655 array
->subexpressions
[1],
656 function_name
, actual_parameters
);
657 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
659 YYLTYPE index_loc
= idx
->get_location();
660 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
661 outer_array_idx
, loc
,
664 ir_variable
*sub_var
= NULL
;
665 *function_name
= array
->primary_expression
.identifier
;
667 match_subroutine_by_name(*function_name
, actual_parameters
,
670 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
671 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
676 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
682 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
683 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
686 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
687 _mesa_glsl_error(loc
, state
, " %s", str
);
693 * Raise a "no matching function" error, listing all possible overloads the
694 * compiler considered so developers can figure out what went wrong.
697 no_matching_function_error(const char *name
,
699 exec_list
*actual_parameters
,
700 _mesa_glsl_parse_state
*state
)
702 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
704 if (state
->symbols
->get_function(name
) == NULL
705 && (!state
->uses_builtin_functions
706 || sh
->symbols
->get_function(name
) == NULL
)) {
707 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
709 char *str
= prototype_string(NULL
, name
, actual_parameters
);
710 _mesa_glsl_error(loc
, state
,
711 "no matching function for call to `%s'; candidates are:",
715 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
717 if (state
->uses_builtin_functions
) {
718 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
724 * Perform automatic type conversion of constructor parameters
726 * This implements the rules in the "Conversion and Scalar Constructors"
727 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
730 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
732 void *ctx
= ralloc_parent(src
);
733 const unsigned a
= desired_type
->base_type
;
734 const unsigned b
= src
->type
->base_type
;
735 ir_expression
*result
= NULL
;
737 if (src
->type
->is_error())
740 assert(a
<= GLSL_TYPE_BOOL
);
741 assert(b
<= GLSL_TYPE_BOOL
);
750 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
752 case GLSL_TYPE_FLOAT
:
753 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
756 result
= new(ctx
) ir_expression(ir_unop_i2u
,
757 new(ctx
) ir_expression(ir_unop_b2i
, src
));
759 case GLSL_TYPE_DOUBLE
:
760 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
767 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
769 case GLSL_TYPE_FLOAT
:
770 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
773 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
775 case GLSL_TYPE_DOUBLE
:
776 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
780 case GLSL_TYPE_FLOAT
:
783 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
786 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
789 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
791 case GLSL_TYPE_DOUBLE
:
792 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
799 result
= new(ctx
) ir_expression(ir_unop_i2b
,
800 new(ctx
) ir_expression(ir_unop_u2i
, src
));
803 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
805 case GLSL_TYPE_FLOAT
:
806 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
808 case GLSL_TYPE_DOUBLE
:
809 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
813 case GLSL_TYPE_DOUBLE
:
816 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
819 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
822 result
= new(ctx
) ir_expression(ir_unop_f2d
,
823 new(ctx
) ir_expression(ir_unop_b2f
, src
));
825 case GLSL_TYPE_FLOAT
:
826 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
831 assert(result
!= NULL
);
832 assert(result
->type
== desired_type
);
834 /* Try constant folding; it may fold in the conversion we just added. */
835 ir_constant
*const constant
= result
->constant_expression_value();
836 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
841 * Perform automatic type and constant conversion of constructor parameters
843 * This implements the rules in the "Implicit Conversions" rules, not the
844 * "Conversion and Scalar Constructors".
846 * After attempting the implicit conversion, an attempt to convert into a
847 * constant valued expression is also done.
849 * The \c from \c ir_rvalue is converted "in place".
851 * \param from Operand that is being converted
852 * \param to Base type the operand will be converted to
853 * \param state GLSL compiler state
856 * If the attempt to convert into a constant expression succeeds, \c true is
857 * returned. Otherwise \c false is returned.
860 implicitly_convert_component(ir_rvalue
* &from
, const glsl_base_type to
,
861 struct _mesa_glsl_parse_state
*state
)
863 ir_rvalue
*result
= from
;
865 if (to
!= from
->type
->base_type
) {
866 const glsl_type
*desired_type
=
867 glsl_type::get_instance(to
,
868 from
->type
->vector_elements
,
869 from
->type
->matrix_columns
);
871 if (from
->type
->can_implicitly_convert_to(desired_type
, state
)) {
872 /* Even though convert_component() implements the constructor
873 * conversion rules (not the implicit conversion rules), its safe
874 * to use it here because we already checked that the implicit
875 * conversion is legal.
877 result
= convert_component(from
, desired_type
);
881 ir_rvalue
*const constant
= result
->constant_expression_value();
883 if (constant
!= NULL
)
886 if (from
!= result
) {
887 from
->replace_with(result
);
891 return constant
!= NULL
;
896 * Dereference a specific component from a scalar, vector, or matrix
899 dereference_component(ir_rvalue
*src
, unsigned component
)
901 void *ctx
= ralloc_parent(src
);
902 assert(component
< src
->type
->components());
904 /* If the source is a constant, just create a new constant instead of a
905 * dereference of the existing constant.
907 ir_constant
*constant
= src
->as_constant();
909 return new(ctx
) ir_constant(constant
, component
);
911 if (src
->type
->is_scalar()) {
913 } else if (src
->type
->is_vector()) {
914 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
916 assert(src
->type
->is_matrix());
918 /* Dereference a row of the matrix, then call this function again to get
919 * a specific element from that row.
921 const int c
= component
/ src
->type
->column_type()->vector_elements
;
922 const int r
= component
% src
->type
->column_type()->vector_elements
;
923 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
924 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
926 col
->type
= src
->type
->column_type();
928 return dereference_component(col
, r
);
931 assert(!"Should not get here.");
937 process_vec_mat_constructor(exec_list
*instructions
,
938 const glsl_type
*constructor_type
,
939 YYLTYPE
*loc
, exec_list
*parameters
,
940 struct _mesa_glsl_parse_state
*state
)
944 /* The ARB_shading_language_420pack spec says:
946 * "If an initializer is a list of initializers enclosed in curly braces,
947 * the variable being declared must be a vector, a matrix, an array, or a
950 * int i = { 1 }; // illegal, i is not an aggregate"
952 if (constructor_type
->vector_elements
<= 1) {
953 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
954 "matrices, arrays, and structs");
955 return ir_rvalue::error_value(ctx
);
958 exec_list actual_parameters
;
959 const unsigned parameter_count
=
960 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
962 if (parameter_count
== 0
963 || (constructor_type
->is_vector() &&
964 constructor_type
->vector_elements
!= parameter_count
)
965 || (constructor_type
->is_matrix() &&
966 constructor_type
->matrix_columns
!= parameter_count
)) {
967 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
968 constructor_type
->is_vector() ? "vector" : "matrix",
969 constructor_type
->vector_elements
);
970 return ir_rvalue::error_value(ctx
);
973 bool all_parameters_are_constant
= true;
975 /* Type cast each parameter and, if possible, fold constants. */
976 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
977 /* Apply implicit conversions (not the scalar constructor rules, see the
978 * spec quote above!) and attempt to convert the parameter to a constant
979 * valued expression. After doing so, track whether or not all the
980 * parameters to the constructor are trivially constant valued
983 all_parameters_are_constant
&=
984 implicitly_convert_component(ir
, constructor_type
->base_type
, state
);
986 if (constructor_type
->is_matrix()) {
987 if (ir
->type
!= constructor_type
->column_type()) {
988 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
989 "expected: %s, found %s",
990 constructor_type
->column_type()->name
,
992 return ir_rvalue::error_value(ctx
);
994 } else if (ir
->type
!= constructor_type
->get_scalar_type()) {
995 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
996 "expected: %s, found %s",
997 constructor_type
->get_scalar_type()->name
,
999 return ir_rvalue::error_value(ctx
);
1003 if (all_parameters_are_constant
)
1004 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1006 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
1008 instructions
->push_tail(var
);
1012 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1013 ir_instruction
*assignment
= NULL
;
1015 if (var
->type
->is_matrix()) {
1016 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1017 new(ctx
) ir_constant(i
));
1018 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1020 /* use writemask rather than index for vector */
1021 assert(var
->type
->is_vector());
1023 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1024 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
1027 instructions
->push_tail(assignment
);
1032 return new(ctx
) ir_dereference_variable(var
);
1037 process_array_constructor(exec_list
*instructions
,
1038 const glsl_type
*constructor_type
,
1039 YYLTYPE
*loc
, exec_list
*parameters
,
1040 struct _mesa_glsl_parse_state
*state
)
1043 /* Array constructors come in two forms: sized and unsized. Sized array
1044 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1045 * variables. In this case the number of parameters must exactly match the
1046 * specified size of the array.
1048 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1049 * are vec4 variables. In this case the size of the array being constructed
1050 * is determined by the number of parameters.
1052 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1054 * "There must be exactly the same number of arguments as the size of
1055 * the array being constructed. If no size is present in the
1056 * constructor, then the array is explicitly sized to the number of
1057 * arguments provided. The arguments are assigned in order, starting at
1058 * element 0, to the elements of the constructed array. Each argument
1059 * must be the same type as the element type of the array, or be a type
1060 * that can be converted to the element type of the array according to
1061 * Section 4.1.10 "Implicit Conversions.""
1063 exec_list actual_parameters
;
1064 const unsigned parameter_count
=
1065 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1066 bool is_unsized_array
= constructor_type
->is_unsized_array();
1068 if ((parameter_count
== 0) ||
1069 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1070 const unsigned min_param
= is_unsized_array
1071 ? 1 : constructor_type
->length
;
1073 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1075 is_unsized_array
? "at least" : "exactly",
1076 min_param
, (min_param
<= 1) ? "" : "s");
1077 return ir_rvalue::error_value(ctx
);
1080 if (is_unsized_array
) {
1082 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1084 assert(constructor_type
!= NULL
);
1085 assert(constructor_type
->length
== parameter_count
);
1088 bool all_parameters_are_constant
= true;
1089 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1091 /* Type cast each parameter and, if possible, fold constants. */
1092 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1093 /* Apply implicit conversions (not the scalar constructor rules, see the
1094 * spec quote above!) and attempt to convert the parameter to a constant
1095 * valued expression. After doing so, track whether or not all the
1096 * parameters to the constructor are trivially constant valued
1099 all_parameters_are_constant
&=
1100 implicitly_convert_component(ir
, element_type
->base_type
, state
);
1102 if (constructor_type
->fields
.array
->is_unsized_array()) {
1103 /* As the inner parameters of the constructor are created without
1104 * knowledge of each other we need to check to make sure unsized
1105 * parameters of unsized constructors all end up with the same size.
1107 * e.g we make sure to fail for a constructor like this:
1108 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1109 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1110 * vec4[](vec4(0.0), vec4(1.0)));
1112 if (element_type
->is_unsized_array()) {
1113 /* This is the first parameter so just get the type */
1114 element_type
= ir
->type
;
1115 } else if (element_type
!= ir
->type
) {
1116 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1117 "expected: %s, found %s",
1120 return ir_rvalue::error_value(ctx
);
1122 } else if (ir
->type
!= constructor_type
->fields
.array
) {
1123 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1124 "expected: %s, found %s",
1125 constructor_type
->fields
.array
->name
,
1127 return ir_rvalue::error_value(ctx
);
1129 element_type
= ir
->type
;
1133 if (constructor_type
->fields
.array
->is_unsized_array()) {
1135 glsl_type::get_array_instance(element_type
,
1137 assert(constructor_type
!= NULL
);
1138 assert(constructor_type
->length
== parameter_count
);
1141 if (all_parameters_are_constant
)
1142 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1144 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1146 instructions
->push_tail(var
);
1149 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1150 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1151 new(ctx
) ir_constant(i
));
1153 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1154 instructions
->push_tail(assignment
);
1159 return new(ctx
) ir_dereference_variable(var
);
1164 * Try to convert a record constructor to a constant expression
1166 static ir_constant
*
1167 constant_record_constructor(const glsl_type
*constructor_type
,
1168 exec_list
*parameters
, void *mem_ctx
)
1170 foreach_in_list(ir_instruction
, node
, parameters
) {
1171 ir_constant
*constant
= node
->as_constant();
1172 if (constant
== NULL
)
1174 node
->replace_with(constant
);
1177 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
1182 * Determine if a list consists of a single scalar r-value
1185 single_scalar_parameter(exec_list
*parameters
)
1187 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->get_head_raw();
1188 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1190 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1195 * Generate inline code for a vector constructor
1197 * The generated constructor code will consist of a temporary variable
1198 * declaration of the same type as the constructor. A sequence of assignments
1199 * from constructor parameters to the temporary will follow.
1202 * An \c ir_dereference_variable of the temprorary generated in the constructor
1206 emit_inline_vector_constructor(const glsl_type
*type
,
1207 exec_list
*instructions
,
1208 exec_list
*parameters
,
1211 assert(!parameters
->is_empty());
1213 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1214 instructions
->push_tail(var
);
1216 /* There are three kinds of vector constructors.
1218 * - Construct a vector from a single scalar by replicating that scalar to
1219 * all components of the vector.
1221 * - Construct a vector from at least a matrix. This case should already
1222 * have been taken care of in ast_function_expression::hir by breaking
1223 * down the matrix into a series of column vectors.
1225 * - Construct a vector from an arbirary combination of vectors and
1226 * scalars. The components of the constructor parameters are assigned
1227 * to the vector in order until the vector is full.
1229 const unsigned lhs_components
= type
->components();
1230 if (single_scalar_parameter(parameters
)) {
1231 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->get_head_raw();
1232 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1234 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1235 const unsigned mask
= (1U << lhs_components
) - 1;
1237 assert(rhs
->type
== lhs
->type
);
1239 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1240 instructions
->push_tail(inst
);
1242 unsigned base_component
= 0;
1243 unsigned base_lhs_component
= 0;
1244 ir_constant_data data
;
1245 unsigned constant_mask
= 0, constant_components
= 0;
1247 memset(&data
, 0, sizeof(data
));
1249 foreach_in_list(ir_rvalue
, param
, parameters
) {
1250 unsigned rhs_components
= param
->type
->components();
1252 /* Do not try to assign more components to the vector than it has!
1254 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1255 rhs_components
= lhs_components
- base_lhs_component
;
1258 const ir_constant
*const c
= param
->as_constant();
1260 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1261 switch (c
->type
->base_type
) {
1262 case GLSL_TYPE_UINT
:
1263 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1266 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1268 case GLSL_TYPE_FLOAT
:
1269 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1271 case GLSL_TYPE_DOUBLE
:
1272 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1274 case GLSL_TYPE_BOOL
:
1275 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1278 assert(!"Should not get here.");
1283 /* Mask of fields to be written in the assignment.
1285 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1286 constant_components
+= rhs_components
;
1288 base_component
+= rhs_components
;
1290 /* Advance the component index by the number of components
1291 * that were just assigned.
1293 base_lhs_component
+= rhs_components
;
1296 if (constant_mask
!= 0) {
1297 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1298 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1299 constant_components
,
1301 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1303 ir_instruction
*inst
=
1304 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1305 instructions
->push_tail(inst
);
1309 foreach_in_list(ir_rvalue
, param
, parameters
) {
1310 unsigned rhs_components
= param
->type
->components();
1312 /* Do not try to assign more components to the vector than it has!
1314 if ((rhs_components
+ base_component
) > lhs_components
) {
1315 rhs_components
= lhs_components
- base_component
;
1318 /* If we do not have any components left to copy, break out of the
1319 * loop. This can happen when initializing a vec4 with a mat3 as the
1320 * mat3 would have been broken into a series of column vectors.
1322 if (rhs_components
== 0) {
1326 const ir_constant
*const c
= param
->as_constant();
1328 /* Mask of fields to be written in the assignment.
1330 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1333 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1335 /* Generate a swizzle so that LHS and RHS sizes match.
1338 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1340 ir_instruction
*inst
=
1341 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1342 instructions
->push_tail(inst
);
1345 /* Advance the component index by the number of components that were
1348 base_component
+= rhs_components
;
1351 return new(ctx
) ir_dereference_variable(var
);
1356 * Generate assignment of a portion of a vector to a portion of a matrix column
1358 * \param src_base First component of the source to be used in assignment
1359 * \param column Column of destination to be assiged
1360 * \param row_base First component of the destination column to be assigned
1361 * \param count Number of components to be assigned
1364 * \c src_base + \c count must be less than or equal to the number of components
1365 * in the source vector.
1368 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1369 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1372 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1373 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1375 assert(column_ref
->type
->components() >= (row_base
+ count
));
1376 assert(src
->type
->components() >= (src_base
+ count
));
1378 /* Generate a swizzle that extracts the number of components from the source
1379 * that are to be assigned to the column of the matrix.
1381 if (count
< src
->type
->vector_elements
) {
1382 src
= new(mem_ctx
) ir_swizzle(src
,
1383 src_base
+ 0, src_base
+ 1,
1384 src_base
+ 2, src_base
+ 3,
1388 /* Mask of fields to be written in the assignment.
1390 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1392 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1397 * Generate inline code for a matrix constructor
1399 * The generated constructor code will consist of a temporary variable
1400 * declaration of the same type as the constructor. A sequence of assignments
1401 * from constructor parameters to the temporary will follow.
1404 * An \c ir_dereference_variable of the temprorary generated in the constructor
1408 emit_inline_matrix_constructor(const glsl_type
*type
,
1409 exec_list
*instructions
,
1410 exec_list
*parameters
,
1413 assert(!parameters
->is_empty());
1415 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1416 instructions
->push_tail(var
);
1418 /* There are three kinds of matrix constructors.
1420 * - Construct a matrix from a single scalar by replicating that scalar to
1421 * along the diagonal of the matrix and setting all other components to
1424 * - Construct a matrix from an arbirary combination of vectors and
1425 * scalars. The components of the constructor parameters are assigned
1426 * to the matrix in column-major order until the matrix is full.
1428 * - Construct a matrix from a single matrix. The source matrix is copied
1429 * to the upper left portion of the constructed matrix, and the remaining
1430 * elements take values from the identity matrix.
1432 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->get_head_raw();
1433 if (single_scalar_parameter(parameters
)) {
1434 /* Assign the scalar to the X component of a vec4, and fill the remaining
1435 * components with zero.
1437 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1438 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1439 param_base_type
== GLSL_TYPE_DOUBLE
);
1440 ir_variable
*rhs_var
=
1441 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1444 instructions
->push_tail(rhs_var
);
1446 ir_constant_data zero
;
1447 for (unsigned i
= 0; i
< 4; i
++)
1448 if (param_base_type
== GLSL_TYPE_FLOAT
)
1453 ir_instruction
*inst
=
1454 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1455 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1457 instructions
->push_tail(inst
);
1459 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1461 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1462 instructions
->push_tail(inst
);
1464 /* Assign the temporary vector to each column of the destination matrix
1465 * with a swizzle that puts the X component on the diagonal of the
1466 * matrix. In some cases this may mean that the X component does not
1467 * get assigned into the column at all (i.e., when the matrix has more
1468 * columns than rows).
1470 static const unsigned rhs_swiz
[4][4] = {
1477 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1478 type
->vector_elements
);
1479 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1480 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1481 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1483 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1484 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1485 type
->vector_elements
);
1487 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1488 instructions
->push_tail(inst
);
1491 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1492 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1493 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1495 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1496 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1497 type
->vector_elements
);
1499 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1500 instructions
->push_tail(inst
);
1502 } else if (first_param
->type
->is_matrix()) {
1503 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1505 * "If a matrix is constructed from a matrix, then each component
1506 * (column i, row j) in the result that has a corresponding
1507 * component (column i, row j) in the argument will be initialized
1508 * from there. All other components will be initialized to the
1509 * identity matrix. If a matrix argument is given to a matrix
1510 * constructor, it is an error to have any other arguments."
1512 assert(first_param
->next
->is_tail_sentinel());
1513 ir_rvalue
*const src_matrix
= first_param
;
1515 /* If the source matrix is smaller, pre-initialize the relavent parts of
1516 * the destination matrix to the identity matrix.
1518 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1519 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1521 /* If the source matrix has fewer rows, every column of the destination
1522 * must be initialized. Otherwise only the columns in the destination
1523 * that do not exist in the source must be initialized.
1526 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1527 ? 0 : src_matrix
->type
->matrix_columns
;
1529 const glsl_type
*const col_type
= var
->type
->column_type();
1530 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1531 ir_constant_data ident
;
1533 if (!col_type
->is_double()) {
1538 ident
.f
[col
] = 1.0f
;
1547 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1549 ir_rvalue
*const lhs
=
1550 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1552 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1553 instructions
->push_tail(inst
);
1557 /* Assign columns from the source matrix to the destination matrix.
1559 * Since the parameter will be used in the RHS of multiple assignments,
1560 * generate a temporary and copy the paramter there.
1562 ir_variable
*const rhs_var
=
1563 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1565 instructions
->push_tail(rhs_var
);
1567 ir_dereference
*const rhs_var_ref
=
1568 new(ctx
) ir_dereference_variable(rhs_var
);
1569 ir_instruction
*const inst
=
1570 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1571 instructions
->push_tail(inst
);
1573 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1574 var
->type
->vector_elements
);
1575 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1576 var
->type
->matrix_columns
);
1578 unsigned swiz
[4] = { 0, 0, 0, 0 };
1579 for (unsigned i
= 1; i
< last_row
; i
++)
1582 const unsigned write_mask
= (1U << last_row
) - 1;
1584 for (unsigned i
= 0; i
< last_col
; i
++) {
1585 ir_dereference
*const lhs
=
1586 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1587 ir_rvalue
*const rhs_col
=
1588 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1590 /* If one matrix has columns that are smaller than the columns of the
1591 * other matrix, wrap the column access of the larger with a swizzle
1592 * so that the LHS and RHS of the assignment have the same size (and
1593 * therefore have the same type).
1595 * It would be perfectly valid to unconditionally generate the
1596 * swizzles, this this will typically result in a more compact IR tree.
1599 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1600 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1605 ir_instruction
*inst
=
1606 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1607 instructions
->push_tail(inst
);
1610 const unsigned cols
= type
->matrix_columns
;
1611 const unsigned rows
= type
->vector_elements
;
1612 unsigned remaining_slots
= rows
* cols
;
1613 unsigned col_idx
= 0;
1614 unsigned row_idx
= 0;
1616 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1617 unsigned rhs_components
= rhs
->type
->components();
1618 unsigned rhs_base
= 0;
1620 if (remaining_slots
== 0)
1623 /* Since the parameter might be used in the RHS of two assignments,
1624 * generate a temporary and copy the paramter there.
1626 ir_variable
*rhs_var
=
1627 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1628 instructions
->push_tail(rhs_var
);
1630 ir_dereference
*rhs_var_ref
=
1631 new(ctx
) ir_dereference_variable(rhs_var
);
1632 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1633 instructions
->push_tail(inst
);
1636 /* Assign the current parameter to as many components of the matrix
1639 * NOTE: A single vector parameter can span two matrix columns. A
1640 * single vec4, for example, can completely fill a mat2.
1642 unsigned count
= MIN2(rows
- row_idx
,
1643 rhs_components
- rhs_base
);
1645 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1646 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1651 instructions
->push_tail(inst
);
1654 remaining_slots
-= count
;
1656 /* Sometimes, there is still data left in the parameters and
1657 * components left to be set in the destination but in other
1660 if (row_idx
>= rows
) {
1664 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1668 return new(ctx
) ir_dereference_variable(var
);
1673 emit_inline_record_constructor(const glsl_type
*type
,
1674 exec_list
*instructions
,
1675 exec_list
*parameters
,
1678 ir_variable
*const var
=
1679 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1680 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1682 instructions
->push_tail(var
);
1684 exec_node
*node
= parameters
->get_head_raw();
1685 for (unsigned i
= 0; i
< type
->length
; i
++) {
1686 assert(!node
->is_tail_sentinel());
1688 ir_dereference
*const lhs
=
1689 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1690 type
->fields
.structure
[i
].name
);
1692 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1693 assert(rhs
!= NULL
);
1695 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1697 instructions
->push_tail(assign
);
1706 process_record_constructor(exec_list
*instructions
,
1707 const glsl_type
*constructor_type
,
1708 YYLTYPE
*loc
, exec_list
*parameters
,
1709 struct _mesa_glsl_parse_state
*state
)
1712 exec_list actual_parameters
;
1714 process_parameters(instructions
, &actual_parameters
,
1717 exec_node
*node
= actual_parameters
.get_head_raw();
1718 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1719 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1721 if (node
->is_tail_sentinel()) {
1722 _mesa_glsl_error(loc
, state
,
1723 "insufficient parameters to constructor for `%s'",
1724 constructor_type
->name
);
1725 return ir_rvalue::error_value(ctx
);
1728 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1730 node
->replace_with(ir
);
1732 _mesa_glsl_error(loc
, state
,
1733 "parameter type mismatch in constructor for `%s.%s' "
1735 constructor_type
->name
,
1736 constructor_type
->fields
.structure
[i
].name
,
1738 constructor_type
->fields
.structure
[i
].type
->name
);
1739 return ir_rvalue::error_value(ctx
);
1745 if (!node
->is_tail_sentinel()) {
1746 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1747 "for `%s'", constructor_type
->name
);
1748 return ir_rvalue::error_value(ctx
);
1751 ir_rvalue
*const constant
=
1752 constant_record_constructor(constructor_type
, &actual_parameters
,
1755 return (constant
!= NULL
)
1757 : emit_inline_record_constructor(constructor_type
, instructions
,
1758 &actual_parameters
, state
);
1762 ast_function_expression::handle_method(exec_list
*instructions
,
1763 struct _mesa_glsl_parse_state
*state
)
1765 const ast_expression
*field
= subexpressions
[0];
1769 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1770 YYLTYPE loc
= get_location();
1771 state
->check_version(120, 300, &loc
, "methods not supported");
1774 method
= field
->primary_expression
.identifier
;
1776 /* This would prevent to raise "uninitialized variable" warnings when
1777 * calling array.length.
1779 field
->subexpressions
[0]->set_is_lhs(true);
1780 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1781 if (strcmp(method
, "length") == 0) {
1782 if (!this->expressions
.is_empty()) {
1783 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1787 if (op
->type
->is_array()) {
1788 if (op
->type
->is_unsized_array()) {
1789 if (!state
->has_shader_storage_buffer_objects()) {
1790 _mesa_glsl_error(&loc
, state
, "length called on unsized array"
1791 " only available with "
1792 "ARB_shader_storage_buffer_object");
1794 /* Calculate length of an unsized array in run-time */
1795 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
, op
);
1797 result
= new(ctx
) ir_constant(op
->type
->array_size());
1799 } else if (op
->type
->is_vector()) {
1800 if (state
->has_420pack()) {
1801 /* .length() returns int. */
1802 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1804 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1805 "with ARB_shading_language_420pack");
1808 } else if (op
->type
->is_matrix()) {
1809 if (state
->has_420pack()) {
1810 /* .length() returns int. */
1811 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1813 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1814 "with ARB_shading_language_420pack");
1818 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1822 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1827 return ir_rvalue::error_value(ctx
);
1831 ast_function_expression::hir(exec_list
*instructions
,
1832 struct _mesa_glsl_parse_state
*state
)
1835 /* There are three sorts of function calls.
1837 * 1. constructors - The first subexpression is an ast_type_specifier.
1838 * 2. methods - Only the .length() method of array types.
1839 * 3. functions - Calls to regular old functions.
1842 if (is_constructor()) {
1843 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1844 YYLTYPE loc
= type
->get_location();
1847 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1849 /* constructor_type can be NULL if a variable with the same name as the
1850 * structure has come into scope.
1852 if (constructor_type
== NULL
) {
1853 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1854 "may be shadowed by a variable with the same name)",
1856 return ir_rvalue::error_value(ctx
);
1860 /* Constructors for opaque types are illegal.
1862 if (constructor_type
->contains_opaque()) {
1863 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1864 constructor_type
->name
);
1865 return ir_rvalue::error_value(ctx
);
1868 if (constructor_type
->is_subroutine()) {
1869 _mesa_glsl_error(& loc
, state
, "subroutine name cannot be a constructor `%s'",
1870 constructor_type
->name
);
1871 return ir_rvalue::error_value(ctx
);
1874 if (constructor_type
->is_array()) {
1875 if (!state
->check_version(120, 300, &loc
,
1876 "array constructors forbidden")) {
1877 return ir_rvalue::error_value(ctx
);
1880 return process_array_constructor(instructions
, constructor_type
,
1881 & loc
, &this->expressions
, state
);
1885 /* There are two kinds of constructor calls. Constructors for arrays and
1886 * structures must have the exact number of arguments with matching types
1887 * in the correct order. These constructors follow essentially the same
1888 * type matching rules as functions.
1890 * Constructors for built-in language types, such as mat4 and vec2, are
1891 * free form. The only requirements are that the parameters must provide
1892 * enough values of the correct scalar type and that no arguments are
1893 * given past the last used argument.
1895 * When using the C-style initializer syntax from GLSL 4.20, constructors
1896 * must have the exact number of arguments with matching types in the
1899 if (constructor_type
->is_record()) {
1900 return process_record_constructor(instructions
, constructor_type
,
1901 &loc
, &this->expressions
,
1905 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1906 return ir_rvalue::error_value(ctx
);
1908 /* Total number of components of the type being constructed. */
1909 const unsigned type_components
= constructor_type
->components();
1911 /* Number of components from parameters that have actually been
1912 * consumed. This is used to perform several kinds of error checking.
1914 unsigned components_used
= 0;
1916 unsigned matrix_parameters
= 0;
1917 unsigned nonmatrix_parameters
= 0;
1918 exec_list actual_parameters
;
1920 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1921 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1923 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1925 * "It is an error to provide extra arguments beyond this
1926 * last used argument."
1928 if (components_used
>= type_components
) {
1929 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1931 constructor_type
->name
);
1932 return ir_rvalue::error_value(ctx
);
1935 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1936 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1937 "non-numeric data type",
1938 constructor_type
->name
);
1939 return ir_rvalue::error_value(ctx
);
1942 /* Count the number of matrix and nonmatrix parameters. This
1943 * is used below to enforce some of the constructor rules.
1945 if (result
->type
->is_matrix())
1946 matrix_parameters
++;
1948 nonmatrix_parameters
++;
1950 actual_parameters
.push_tail(result
);
1951 components_used
+= result
->type
->components();
1954 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1956 * "It is an error to construct matrices from other matrices. This
1957 * is reserved for future use."
1959 if (matrix_parameters
> 0
1960 && constructor_type
->is_matrix()
1961 && !state
->check_version(120, 100, &loc
,
1962 "cannot construct `%s' from a matrix",
1963 constructor_type
->name
)) {
1964 return ir_rvalue::error_value(ctx
);
1967 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1969 * "If a matrix argument is given to a matrix constructor, it is
1970 * an error to have any other arguments."
1972 if ((matrix_parameters
> 0)
1973 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1974 && constructor_type
->is_matrix()) {
1975 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1976 "matrix must be only parameter",
1977 constructor_type
->name
);
1978 return ir_rvalue::error_value(ctx
);
1981 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1983 * "In these cases, there must be enough components provided in the
1984 * arguments to provide an initializer for every component in the
1985 * constructed value."
1987 if (components_used
< type_components
&& components_used
!= 1
1988 && matrix_parameters
== 0) {
1989 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1991 constructor_type
->name
);
1992 return ir_rvalue::error_value(ctx
);
1995 /* Matrices can never be consumed as is by any constructor but matrix
1996 * constructors. If the constructor type is not matrix, always break the
1997 * matrix up into a series of column vectors.
1999 if (!constructor_type
->is_matrix()) {
2000 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
2001 if (!matrix
->type
->is_matrix())
2004 /* Create a temporary containing the matrix. */
2005 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
2007 instructions
->push_tail(var
);
2008 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
2009 ir_dereference_variable(var
), matrix
, NULL
));
2010 var
->constant_value
= matrix
->constant_expression_value();
2012 /* Replace the matrix with dereferences of its columns. */
2013 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2014 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
2015 new(ctx
) ir_constant(i
)));
2021 bool all_parameters_are_constant
= true;
2023 /* Type cast each parameter and, if possible, fold constants.*/
2024 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2025 const glsl_type
*desired_type
=
2026 glsl_type::get_instance(constructor_type
->base_type
,
2027 ir
->type
->vector_elements
,
2028 ir
->type
->matrix_columns
);
2029 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2031 /* Attempt to convert the parameter to a constant valued expression.
2032 * After doing so, track whether or not all the parameters to the
2033 * constructor are trivially constant valued expressions.
2035 ir_rvalue
*const constant
= result
->constant_expression_value();
2037 if (constant
!= NULL
)
2040 all_parameters_are_constant
= false;
2043 ir
->replace_with(result
);
2047 /* If all of the parameters are trivially constant, create a
2048 * constant representing the complete collection of parameters.
2050 if (all_parameters_are_constant
) {
2051 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2052 } else if (constructor_type
->is_scalar()) {
2053 return dereference_component((ir_rvalue
*) actual_parameters
.get_head_raw(),
2055 } else if (constructor_type
->is_vector()) {
2056 return emit_inline_vector_constructor(constructor_type
,
2061 assert(constructor_type
->is_matrix());
2062 return emit_inline_matrix_constructor(constructor_type
,
2067 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2068 return handle_method(instructions
, state
);
2070 const ast_expression
*id
= subexpressions
[0];
2071 const char *func_name
;
2072 YYLTYPE loc
= get_location();
2073 exec_list actual_parameters
;
2074 ir_variable
*sub_var
= NULL
;
2075 ir_rvalue
*array_idx
= NULL
;
2077 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2080 if (id
->oper
== ast_array_index
) {
2081 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2082 id
->subexpressions
[0],
2083 id
->subexpressions
[1], &func_name
,
2084 &actual_parameters
);
2086 func_name
= id
->primary_expression
.identifier
;
2089 /* an error was emitted earlier */
2091 return ir_rvalue::error_value(ctx
);
2093 ir_function_signature
*sig
=
2094 match_function_by_name(func_name
, &actual_parameters
, state
);
2096 ir_rvalue
*value
= NULL
;
2098 sig
= match_subroutine_by_name(func_name
, &actual_parameters
, state
, &sub_var
);
2102 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
2103 value
= ir_rvalue::error_value(ctx
);
2104 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
2105 /* an error has already been emitted */
2106 value
= ir_rvalue::error_value(ctx
);
2108 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
, array_idx
, state
);
2110 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2113 instructions
->push_tail(tmp
);
2114 value
= new(ctx
) ir_dereference_variable(tmp
);
2121 unreachable("not reached");
2125 ast_function_expression::has_sequence_subexpression() const
2127 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2128 if (ast
->has_sequence_subexpression())
2136 ast_aggregate_initializer::hir(exec_list
*instructions
,
2137 struct _mesa_glsl_parse_state
*state
)
2140 YYLTYPE loc
= this->get_location();
2142 if (!this->constructor_type
) {
2143 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2144 return ir_rvalue::error_value(ctx
);
2146 const glsl_type
*const constructor_type
= this->constructor_type
;
2148 if (!state
->has_420pack()) {
2149 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2150 "GL_ARB_shading_language_420pack extension");
2151 return ir_rvalue::error_value(ctx
);
2154 if (constructor_type
->is_array()) {
2155 return process_array_constructor(instructions
, constructor_type
, &loc
,
2156 &this->expressions
, state
);
2159 if (constructor_type
->is_record()) {
2160 return process_record_constructor(instructions
, constructor_type
, &loc
,
2161 &this->expressions
, state
);
2164 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2165 &this->expressions
, state
);