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
.head
;
190 exec_node
*actual_ast_node
= actual_ast_parameters
.head
;
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
= (ir_rvalue
*) actual_ir_parameters
.head
;
323 const ast_expression
*const actual_ast
=
324 exec_node_data(ast_expression
, actual_ast_parameters
.head
, link
);
325 YYLTYPE loc
= actual_ast
->get_location();
327 if (!verify_first_atomic_parameter(&loc
, state
,
328 actual
->variable_referenced())) {
337 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
338 exec_list
*before_instructions
, exec_list
*after_instructions
,
339 bool parameter_is_inout
)
341 ir_expression
*const expr
= actual
->as_expression();
343 /* If the types match exactly and the parameter is not a vector-extract,
344 * nothing needs to be done to fix the parameter.
346 if (formal_type
== actual
->type
347 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
350 /* To convert an out parameter, we need to create a temporary variable to
351 * hold the value before conversion, and then perform the conversion after
352 * the function call returns.
354 * This has the effect of transforming code like this:
360 * Into IR that's equivalent to this:
364 * int out_parameter_conversion;
365 * f(out_parameter_conversion);
366 * value = float(out_parameter_conversion);
368 * If the parameter is an ir_expression of ir_binop_vector_extract,
369 * additional conversion is needed in the post-call re-write.
372 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
374 before_instructions
->push_tail(tmp
);
376 /* If the parameter is an inout parameter, copy the value of the actual
377 * parameter to the new temporary. Note that no type conversion is allowed
378 * here because inout parameters must match types exactly.
380 if (parameter_is_inout
) {
381 /* Inout parameters should never require conversion, since that would
382 * require an implicit conversion to exist both to and from the formal
383 * parameter type, and there are no bidirectional implicit conversions.
385 assert (actual
->type
== formal_type
);
387 ir_dereference_variable
*const deref_tmp_1
=
388 new(mem_ctx
) ir_dereference_variable(tmp
);
389 ir_assignment
*const assignment
=
390 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
391 before_instructions
->push_tail(assignment
);
394 /* Replace the parameter in the call with a dereference of the new
397 ir_dereference_variable
*const deref_tmp_2
=
398 new(mem_ctx
) ir_dereference_variable(tmp
);
399 actual
->replace_with(deref_tmp_2
);
402 /* Copy the temporary variable to the actual parameter with optional
403 * type conversion applied.
405 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
406 if (actual
->type
!= formal_type
)
407 rhs
= convert_component(rhs
, actual
->type
);
409 ir_rvalue
*lhs
= actual
;
410 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
411 lhs
= new(mem_ctx
) ir_dereference_array(expr
->operands
[0]->clone(mem_ctx
, NULL
),
412 expr
->operands
[1]->clone(mem_ctx
, NULL
));
415 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
416 after_instructions
->push_tail(assignment_2
);
420 * Generate a function call.
422 * For non-void functions, this returns a dereference of the temporary variable
423 * which stores the return value for the call. For void functions, this returns
427 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
428 exec_list
*actual_parameters
,
429 ir_variable
*sub_var
,
430 ir_rvalue
*array_idx
,
431 struct _mesa_glsl_parse_state
*state
)
434 exec_list post_call_conversions
;
436 /* Perform implicit conversion of arguments. For out parameters, we need
437 * to place them in a temporary variable and do the conversion after the
438 * call takes place. Since we haven't emitted the call yet, we'll place
439 * the post-call conversions in a temporary exec_list, and emit them later.
441 foreach_two_lists(formal_node
, &sig
->parameters
,
442 actual_node
, actual_parameters
) {
443 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
444 ir_variable
*formal
= (ir_variable
*) formal_node
;
446 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
447 switch (formal
->data
.mode
) {
448 case ir_var_const_in
:
449 case ir_var_function_in
: {
451 = convert_component(actual
, formal
->type
);
452 actual
->replace_with(converted
);
455 case ir_var_function_out
:
456 case ir_var_function_inout
:
457 fix_parameter(ctx
, actual
, formal
->type
,
458 instructions
, &post_call_conversions
,
459 formal
->data
.mode
== ir_var_function_inout
);
462 assert (!"Illegal formal parameter mode");
468 /* Section 4.3.2 (Const) of the GLSL 1.10.59 spec says:
470 * "Initializers for const declarations must be formed from literal
471 * values, other const variables (not including function call
472 * paramaters), or expressions of these.
474 * Constructors may be used in such expressions, but function calls may
477 * Section 4.3.3 (Constant Expressions) of the GLSL 1.20.8 spec says:
479 * "A constant expression is one of
483 * - a built-in function call whose arguments are all constant
484 * expressions, with the exception of the texture lookup
485 * functions, the noise functions, and ftransform. The built-in
486 * functions dFdx, dFdy, and fwidth must return 0 when evaluated
487 * inside an initializer with an argument that is a constant
490 * Section 5.10 (Constant Expressions) of the GLSL ES 1.00.17 spec says:
492 * "A constant expression is one of
496 * - a built-in function call whose arguments are all constant
497 * expressions, with the exception of the texture lookup
500 * Section 4.3.3 (Constant Expressions) of the GLSL ES 3.00.4 spec says:
502 * "A constant expression is one of
506 * - a built-in function call whose arguments are all constant
507 * expressions, with the exception of the texture lookup
508 * functions. The built-in functions dFdx, dFdy, and fwidth must
509 * return 0 when evaluated inside an initializer with an argument
510 * that is a constant expression."
512 * If the function call is a constant expression, don't generate any
513 * instructions; just generate an ir_constant.
515 if (state
->is_version(120, 100)) {
516 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
522 ir_dereference_variable
*deref
= NULL
;
523 if (!sig
->return_type
->is_void()) {
524 /* Create a new temporary to hold the return value. */
525 char *const name
= ir_variable::temporaries_allocate_names
526 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
531 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
532 instructions
->push_tail(var
);
536 deref
= new(ctx
) ir_dereference_variable(var
);
539 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
, sub_var
, array_idx
);
540 instructions
->push_tail(call
);
542 /* Also emit any necessary out-parameter conversions. */
543 instructions
->append_list(&post_call_conversions
);
545 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
549 * Given a function name and parameter list, find the matching signature.
551 static ir_function_signature
*
552 match_function_by_name(const char *name
,
553 exec_list
*actual_parameters
,
554 struct _mesa_glsl_parse_state
*state
)
557 ir_function
*f
= state
->symbols
->get_function(name
);
558 ir_function_signature
*local_sig
= NULL
;
559 ir_function_signature
*sig
= NULL
;
561 /* Is the function hidden by a record type constructor? */
562 if (state
->symbols
->get_type(name
))
563 goto done
; /* no match */
565 /* Is the function hidden by a variable (impossible in 1.10)? */
566 if (!state
->symbols
->separate_function_namespace
567 && state
->symbols
->get_variable(name
))
568 goto done
; /* no match */
571 /* In desktop GL, the presence of a user-defined signature hides any
572 * built-in signatures, so we must ignore them. In contrast, in ES2
573 * user-defined signatures add new overloads, so we must consider them.
575 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
577 /* Look for a match in the local shader. If exact, we're done. */
578 bool is_exact
= false;
579 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
580 allow_builtins
, &is_exact
);
588 /* Local shader has no exact candidates; check the built-ins. */
589 _mesa_glsl_initialize_builtin_functions();
590 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
594 /* If the match is from a linked built-in shader, import the prototype. */
595 if (sig
!= local_sig
) {
597 f
= new(ctx
) ir_function(name
);
598 state
->symbols
->add_global_function(f
);
599 emit_function(state
, f
);
601 sig
= sig
->clone_prototype(f
, NULL
);
602 f
->add_signature(sig
);
608 static ir_function_signature
*
609 match_subroutine_by_name(const char *name
,
610 exec_list
*actual_parameters
,
611 struct _mesa_glsl_parse_state
*state
,
615 ir_function_signature
*sig
= NULL
;
616 ir_function
*f
, *found
= NULL
;
617 const char *new_name
;
619 bool is_exact
= false;
621 new_name
= ralloc_asprintf(ctx
, "%s_%s", _mesa_shader_stage_to_subroutine_prefix(state
->stage
), name
);
622 var
= state
->symbols
->get_variable(new_name
);
626 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
627 f
= state
->subroutine_types
[i
];
628 if (strcmp(f
->name
, var
->type
->without_array()->name
))
637 sig
= found
->matching_signature(state
, actual_parameters
,
643 generate_array_index(void *mem_ctx
, exec_list
*instructions
,
644 struct _mesa_glsl_parse_state
*state
, YYLTYPE loc
,
645 const ast_expression
*array
, ast_expression
*idx
,
646 const char **function_name
, exec_list
*actual_parameters
)
648 if (array
->oper
== ast_array_index
) {
649 /* This handles arrays of arrays */
650 ir_rvalue
*outer_array
= generate_array_index(mem_ctx
, instructions
,
652 array
->subexpressions
[0],
653 array
->subexpressions
[1],
654 function_name
, actual_parameters
);
655 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
657 YYLTYPE index_loc
= idx
->get_location();
658 return _mesa_ast_array_index_to_hir(mem_ctx
, state
, outer_array
,
659 outer_array_idx
, loc
,
662 ir_variable
*sub_var
= NULL
;
663 *function_name
= array
->primary_expression
.identifier
;
665 match_subroutine_by_name(*function_name
, actual_parameters
,
668 ir_rvalue
*outer_array_idx
= idx
->hir(instructions
, state
);
669 return new(mem_ctx
) ir_dereference_array(sub_var
, outer_array_idx
);
674 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
680 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
681 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
684 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
685 _mesa_glsl_error(loc
, state
, " %s", str
);
691 * Raise a "no matching function" error, listing all possible overloads the
692 * compiler considered so developers can figure out what went wrong.
695 no_matching_function_error(const char *name
,
697 exec_list
*actual_parameters
,
698 _mesa_glsl_parse_state
*state
)
700 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
702 if (state
->symbols
->get_function(name
) == NULL
703 && (!state
->uses_builtin_functions
704 || sh
->symbols
->get_function(name
) == NULL
)) {
705 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
707 char *str
= prototype_string(NULL
, name
, actual_parameters
);
708 _mesa_glsl_error(loc
, state
,
709 "no matching function for call to `%s'; candidates are:",
713 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
715 if (state
->uses_builtin_functions
) {
716 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
722 * Perform automatic type conversion of constructor parameters
724 * This implements the rules in the "Conversion and Scalar Constructors"
725 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
728 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
730 void *ctx
= ralloc_parent(src
);
731 const unsigned a
= desired_type
->base_type
;
732 const unsigned b
= src
->type
->base_type
;
733 ir_expression
*result
= NULL
;
735 if (src
->type
->is_error())
738 assert(a
<= GLSL_TYPE_BOOL
);
739 assert(b
<= GLSL_TYPE_BOOL
);
748 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
750 case GLSL_TYPE_FLOAT
:
751 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
754 result
= new(ctx
) ir_expression(ir_unop_i2u
,
755 new(ctx
) ir_expression(ir_unop_b2i
, src
));
757 case GLSL_TYPE_DOUBLE
:
758 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
765 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
767 case GLSL_TYPE_FLOAT
:
768 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
771 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
773 case GLSL_TYPE_DOUBLE
:
774 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
778 case GLSL_TYPE_FLOAT
:
781 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
784 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
787 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
789 case GLSL_TYPE_DOUBLE
:
790 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
797 result
= new(ctx
) ir_expression(ir_unop_i2b
,
798 new(ctx
) ir_expression(ir_unop_u2i
, src
));
801 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
803 case GLSL_TYPE_FLOAT
:
804 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
806 case GLSL_TYPE_DOUBLE
:
807 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
811 case GLSL_TYPE_DOUBLE
:
814 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
817 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
820 result
= new(ctx
) ir_expression(ir_unop_f2d
,
821 new(ctx
) ir_expression(ir_unop_b2f
, src
));
823 case GLSL_TYPE_FLOAT
:
824 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
829 assert(result
!= NULL
);
830 assert(result
->type
== desired_type
);
832 /* Try constant folding; it may fold in the conversion we just added. */
833 ir_constant
*const constant
= result
->constant_expression_value();
834 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
838 * Dereference a specific component from a scalar, vector, or matrix
841 dereference_component(ir_rvalue
*src
, unsigned component
)
843 void *ctx
= ralloc_parent(src
);
844 assert(component
< src
->type
->components());
846 /* If the source is a constant, just create a new constant instead of a
847 * dereference of the existing constant.
849 ir_constant
*constant
= src
->as_constant();
851 return new(ctx
) ir_constant(constant
, component
);
853 if (src
->type
->is_scalar()) {
855 } else if (src
->type
->is_vector()) {
856 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
858 assert(src
->type
->is_matrix());
860 /* Dereference a row of the matrix, then call this function again to get
861 * a specific element from that row.
863 const int c
= component
/ src
->type
->column_type()->vector_elements
;
864 const int r
= component
% src
->type
->column_type()->vector_elements
;
865 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
866 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
868 col
->type
= src
->type
->column_type();
870 return dereference_component(col
, r
);
873 assert(!"Should not get here.");
879 process_vec_mat_constructor(exec_list
*instructions
,
880 const glsl_type
*constructor_type
,
881 YYLTYPE
*loc
, exec_list
*parameters
,
882 struct _mesa_glsl_parse_state
*state
)
886 /* The ARB_shading_language_420pack spec says:
888 * "If an initializer is a list of initializers enclosed in curly braces,
889 * the variable being declared must be a vector, a matrix, an array, or a
892 * int i = { 1 }; // illegal, i is not an aggregate"
894 if (constructor_type
->vector_elements
<= 1) {
895 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
896 "matrices, arrays, and structs");
897 return ir_rvalue::error_value(ctx
);
900 exec_list actual_parameters
;
901 const unsigned parameter_count
=
902 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
904 if (parameter_count
== 0
905 || (constructor_type
->is_vector() &&
906 constructor_type
->vector_elements
!= parameter_count
)
907 || (constructor_type
->is_matrix() &&
908 constructor_type
->matrix_columns
!= parameter_count
)) {
909 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
910 constructor_type
->is_vector() ? "vector" : "matrix",
911 constructor_type
->vector_elements
);
912 return ir_rvalue::error_value(ctx
);
915 bool all_parameters_are_constant
= true;
917 /* Type cast each parameter and, if possible, fold constants. */
918 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
919 ir_rvalue
*result
= ir
;
921 /* Apply implicit conversions (not the scalar constructor rules!). See
922 * the spec quote above. */
923 if (constructor_type
->base_type
!= result
->type
->base_type
) {
924 const glsl_type
*desired_type
=
925 glsl_type::get_instance(constructor_type
->base_type
,
926 ir
->type
->vector_elements
,
927 ir
->type
->matrix_columns
);
928 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
929 /* Even though convert_component() implements the constructor
930 * conversion rules (not the implicit conversion rules), its safe
931 * to use it here because we already checked that the implicit
932 * conversion is legal.
934 result
= convert_component(ir
, desired_type
);
938 if (constructor_type
->is_matrix()) {
939 if (result
->type
!= constructor_type
->column_type()) {
940 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
941 "expected: %s, found %s",
942 constructor_type
->column_type()->name
,
944 return ir_rvalue::error_value(ctx
);
946 } else if (result
->type
!= constructor_type
->get_scalar_type()) {
947 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
948 "expected: %s, found %s",
949 constructor_type
->get_scalar_type()->name
,
951 return ir_rvalue::error_value(ctx
);
954 /* Attempt to convert the parameter to a constant valued expression.
955 * After doing so, track whether or not all the parameters to the
956 * constructor are trivially constant valued expressions.
958 ir_rvalue
*const constant
= result
->constant_expression_value();
960 if (constant
!= NULL
)
963 all_parameters_are_constant
= false;
965 ir
->replace_with(result
);
968 if (all_parameters_are_constant
)
969 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
971 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
973 instructions
->push_tail(var
);
977 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
978 ir_instruction
*assignment
= NULL
;
980 if (var
->type
->is_matrix()) {
981 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
982 new(ctx
) ir_constant(i
));
983 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
985 /* use writemask rather than index for vector */
986 assert(var
->type
->is_vector());
988 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
989 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
992 instructions
->push_tail(assignment
);
997 return new(ctx
) ir_dereference_variable(var
);
1002 process_array_constructor(exec_list
*instructions
,
1003 const glsl_type
*constructor_type
,
1004 YYLTYPE
*loc
, exec_list
*parameters
,
1005 struct _mesa_glsl_parse_state
*state
)
1008 /* Array constructors come in two forms: sized and unsized. Sized array
1009 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
1010 * variables. In this case the number of parameters must exactly match the
1011 * specified size of the array.
1013 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
1014 * are vec4 variables. In this case the size of the array being constructed
1015 * is determined by the number of parameters.
1017 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
1019 * "There must be exactly the same number of arguments as the size of
1020 * the array being constructed. If no size is present in the
1021 * constructor, then the array is explicitly sized to the number of
1022 * arguments provided. The arguments are assigned in order, starting at
1023 * element 0, to the elements of the constructed array. Each argument
1024 * must be the same type as the element type of the array, or be a type
1025 * that can be converted to the element type of the array according to
1026 * Section 4.1.10 "Implicit Conversions.""
1028 exec_list actual_parameters
;
1029 const unsigned parameter_count
=
1030 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
1031 bool is_unsized_array
= constructor_type
->is_unsized_array();
1033 if ((parameter_count
== 0) ||
1034 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
1035 const unsigned min_param
= is_unsized_array
1036 ? 1 : constructor_type
->length
;
1038 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
1040 is_unsized_array
? "at least" : "exactly",
1041 min_param
, (min_param
<= 1) ? "" : "s");
1042 return ir_rvalue::error_value(ctx
);
1045 if (is_unsized_array
) {
1047 glsl_type::get_array_instance(constructor_type
->fields
.array
,
1049 assert(constructor_type
!= NULL
);
1050 assert(constructor_type
->length
== parameter_count
);
1053 bool all_parameters_are_constant
= true;
1054 const glsl_type
*element_type
= constructor_type
->fields
.array
;
1056 /* Type cast each parameter and, if possible, fold constants. */
1057 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1058 ir_rvalue
*result
= ir
;
1060 const glsl_base_type element_base_type
=
1061 constructor_type
->fields
.array
->base_type
;
1063 /* Apply implicit conversions (not the scalar constructor rules!). See
1064 * the spec quote above. */
1065 if (element_base_type
!= result
->type
->base_type
) {
1066 const glsl_type
*desired_type
=
1067 glsl_type::get_instance(element_base_type
,
1068 ir
->type
->vector_elements
,
1069 ir
->type
->matrix_columns
);
1071 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
1072 /* Even though convert_component() implements the constructor
1073 * conversion rules (not the implicit conversion rules), its safe
1074 * to use it here because we already checked that the implicit
1075 * conversion is legal.
1077 result
= convert_component(ir
, desired_type
);
1081 if (constructor_type
->fields
.array
->is_unsized_array()) {
1082 /* As the inner parameters of the constructor are created without
1083 * knowledge of each other we need to check to make sure unsized
1084 * parameters of unsized constructors all end up with the same size.
1086 * e.g we make sure to fail for a constructor like this:
1087 * vec4[][] a = vec4[][](vec4[](vec4(0.0), vec4(1.0)),
1088 * vec4[](vec4(0.0), vec4(1.0), vec4(1.0)),
1089 * vec4[](vec4(0.0), vec4(1.0)));
1091 if (element_type
->is_unsized_array()) {
1092 /* This is the first parameter so just get the type */
1093 element_type
= result
->type
;
1094 } else if (element_type
!= result
->type
) {
1095 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1096 "expected: %s, found %s",
1098 result
->type
->name
);
1099 return ir_rvalue::error_value(ctx
);
1101 } else if (result
->type
!= constructor_type
->fields
.array
) {
1102 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
1103 "expected: %s, found %s",
1104 constructor_type
->fields
.array
->name
,
1105 result
->type
->name
);
1106 return ir_rvalue::error_value(ctx
);
1108 element_type
= result
->type
;
1111 /* Attempt to convert the parameter to a constant valued expression.
1112 * After doing so, track whether or not all the parameters to the
1113 * constructor are trivially constant valued expressions.
1115 ir_rvalue
*const constant
= result
->constant_expression_value();
1117 if (constant
!= NULL
)
1120 all_parameters_are_constant
= false;
1122 ir
->replace_with(result
);
1125 if (constructor_type
->fields
.array
->is_unsized_array()) {
1127 glsl_type::get_array_instance(element_type
,
1129 assert(constructor_type
!= NULL
);
1130 assert(constructor_type
->length
== parameter_count
);
1133 if (all_parameters_are_constant
)
1134 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1136 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
1138 instructions
->push_tail(var
);
1141 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
1142 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
1143 new(ctx
) ir_constant(i
));
1145 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1146 instructions
->push_tail(assignment
);
1151 return new(ctx
) ir_dereference_variable(var
);
1156 * Try to convert a record constructor to a constant expression
1158 static ir_constant
*
1159 constant_record_constructor(const glsl_type
*constructor_type
,
1160 exec_list
*parameters
, void *mem_ctx
)
1162 foreach_in_list(ir_instruction
, node
, parameters
) {
1163 ir_constant
*constant
= node
->as_constant();
1164 if (constant
== NULL
)
1166 node
->replace_with(constant
);
1169 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
1174 * Determine if a list consists of a single scalar r-value
1177 single_scalar_parameter(exec_list
*parameters
)
1179 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
1180 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1182 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1187 * Generate inline code for a vector constructor
1189 * The generated constructor code will consist of a temporary variable
1190 * declaration of the same type as the constructor. A sequence of assignments
1191 * from constructor parameters to the temporary will follow.
1194 * An \c ir_dereference_variable of the temprorary generated in the constructor
1198 emit_inline_vector_constructor(const glsl_type
*type
,
1199 exec_list
*instructions
,
1200 exec_list
*parameters
,
1203 assert(!parameters
->is_empty());
1205 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1206 instructions
->push_tail(var
);
1208 /* There are three kinds of vector constructors.
1210 * - Construct a vector from a single scalar by replicating that scalar to
1211 * all components of the vector.
1213 * - Construct a vector from at least a matrix. This case should already
1214 * have been taken care of in ast_function_expression::hir by breaking
1215 * down the matrix into a series of column vectors.
1217 * - Construct a vector from an arbirary combination of vectors and
1218 * scalars. The components of the constructor parameters are assigned
1219 * to the vector in order until the vector is full.
1221 const unsigned lhs_components
= type
->components();
1222 if (single_scalar_parameter(parameters
)) {
1223 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
1224 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1226 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1227 const unsigned mask
= (1U << lhs_components
) - 1;
1229 assert(rhs
->type
== lhs
->type
);
1231 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1232 instructions
->push_tail(inst
);
1234 unsigned base_component
= 0;
1235 unsigned base_lhs_component
= 0;
1236 ir_constant_data data
;
1237 unsigned constant_mask
= 0, constant_components
= 0;
1239 memset(&data
, 0, sizeof(data
));
1241 foreach_in_list(ir_rvalue
, param
, parameters
) {
1242 unsigned rhs_components
= param
->type
->components();
1244 /* Do not try to assign more components to the vector than it has!
1246 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1247 rhs_components
= lhs_components
- base_lhs_component
;
1250 const ir_constant
*const c
= param
->as_constant();
1252 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1253 switch (c
->type
->base_type
) {
1254 case GLSL_TYPE_UINT
:
1255 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1258 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1260 case GLSL_TYPE_FLOAT
:
1261 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1263 case GLSL_TYPE_DOUBLE
:
1264 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1266 case GLSL_TYPE_BOOL
:
1267 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1270 assert(!"Should not get here.");
1275 /* Mask of fields to be written in the assignment.
1277 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1278 constant_components
+= rhs_components
;
1280 base_component
+= rhs_components
;
1282 /* Advance the component index by the number of components
1283 * that were just assigned.
1285 base_lhs_component
+= rhs_components
;
1288 if (constant_mask
!= 0) {
1289 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1290 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1291 constant_components
,
1293 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1295 ir_instruction
*inst
=
1296 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1297 instructions
->push_tail(inst
);
1301 foreach_in_list(ir_rvalue
, param
, parameters
) {
1302 unsigned rhs_components
= param
->type
->components();
1304 /* Do not try to assign more components to the vector than it has!
1306 if ((rhs_components
+ base_component
) > lhs_components
) {
1307 rhs_components
= lhs_components
- base_component
;
1310 /* If we do not have any components left to copy, break out of the
1311 * loop. This can happen when initializing a vec4 with a mat3 as the
1312 * mat3 would have been broken into a series of column vectors.
1314 if (rhs_components
== 0) {
1318 const ir_constant
*const c
= param
->as_constant();
1320 /* Mask of fields to be written in the assignment.
1322 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1325 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1327 /* Generate a swizzle so that LHS and RHS sizes match.
1330 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1332 ir_instruction
*inst
=
1333 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1334 instructions
->push_tail(inst
);
1337 /* Advance the component index by the number of components that were
1340 base_component
+= rhs_components
;
1343 return new(ctx
) ir_dereference_variable(var
);
1348 * Generate assignment of a portion of a vector to a portion of a matrix column
1350 * \param src_base First component of the source to be used in assignment
1351 * \param column Column of destination to be assiged
1352 * \param row_base First component of the destination column to be assigned
1353 * \param count Number of components to be assigned
1356 * \c src_base + \c count must be less than or equal to the number of components
1357 * in the source vector.
1360 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1361 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1364 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1365 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1367 assert(column_ref
->type
->components() >= (row_base
+ count
));
1368 assert(src
->type
->components() >= (src_base
+ count
));
1370 /* Generate a swizzle that extracts the number of components from the source
1371 * that are to be assigned to the column of the matrix.
1373 if (count
< src
->type
->vector_elements
) {
1374 src
= new(mem_ctx
) ir_swizzle(src
,
1375 src_base
+ 0, src_base
+ 1,
1376 src_base
+ 2, src_base
+ 3,
1380 /* Mask of fields to be written in the assignment.
1382 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1384 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1389 * Generate inline code for a matrix constructor
1391 * The generated constructor code will consist of a temporary variable
1392 * declaration of the same type as the constructor. A sequence of assignments
1393 * from constructor parameters to the temporary will follow.
1396 * An \c ir_dereference_variable of the temprorary generated in the constructor
1400 emit_inline_matrix_constructor(const glsl_type
*type
,
1401 exec_list
*instructions
,
1402 exec_list
*parameters
,
1405 assert(!parameters
->is_empty());
1407 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1408 instructions
->push_tail(var
);
1410 /* There are three kinds of matrix constructors.
1412 * - Construct a matrix from a single scalar by replicating that scalar to
1413 * along the diagonal of the matrix and setting all other components to
1416 * - Construct a matrix from an arbirary combination of vectors and
1417 * scalars. The components of the constructor parameters are assigned
1418 * to the matrix in column-major order until the matrix is full.
1420 * - Construct a matrix from a single matrix. The source matrix is copied
1421 * to the upper left portion of the constructed matrix, and the remaining
1422 * elements take values from the identity matrix.
1424 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
1425 if (single_scalar_parameter(parameters
)) {
1426 /* Assign the scalar to the X component of a vec4, and fill the remaining
1427 * components with zero.
1429 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1430 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1431 param_base_type
== GLSL_TYPE_DOUBLE
);
1432 ir_variable
*rhs_var
=
1433 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1436 instructions
->push_tail(rhs_var
);
1438 ir_constant_data zero
;
1439 for (unsigned i
= 0; i
< 4; i
++)
1440 if (param_base_type
== GLSL_TYPE_FLOAT
)
1445 ir_instruction
*inst
=
1446 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1447 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1449 instructions
->push_tail(inst
);
1451 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1453 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1454 instructions
->push_tail(inst
);
1456 /* Assign the temporary vector to each column of the destination matrix
1457 * with a swizzle that puts the X component on the diagonal of the
1458 * matrix. In some cases this may mean that the X component does not
1459 * get assigned into the column at all (i.e., when the matrix has more
1460 * columns than rows).
1462 static const unsigned rhs_swiz
[4][4] = {
1469 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1470 type
->vector_elements
);
1471 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1472 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1473 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1475 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1476 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1477 type
->vector_elements
);
1479 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1480 instructions
->push_tail(inst
);
1483 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1484 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1485 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1487 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1488 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1489 type
->vector_elements
);
1491 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1492 instructions
->push_tail(inst
);
1494 } else if (first_param
->type
->is_matrix()) {
1495 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1497 * "If a matrix is constructed from a matrix, then each component
1498 * (column i, row j) in the result that has a corresponding
1499 * component (column i, row j) in the argument will be initialized
1500 * from there. All other components will be initialized to the
1501 * identity matrix. If a matrix argument is given to a matrix
1502 * constructor, it is an error to have any other arguments."
1504 assert(first_param
->next
->is_tail_sentinel());
1505 ir_rvalue
*const src_matrix
= first_param
;
1507 /* If the source matrix is smaller, pre-initialize the relavent parts of
1508 * the destination matrix to the identity matrix.
1510 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
) ||
1511 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1513 /* If the source matrix has fewer rows, every column of the destination
1514 * must be initialized. Otherwise only the columns in the destination
1515 * that do not exist in the source must be initialized.
1518 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1519 ? 0 : src_matrix
->type
->matrix_columns
;
1521 const glsl_type
*const col_type
= var
->type
->column_type();
1522 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1523 ir_constant_data ident
;
1525 if (!col_type
->is_double()) {
1530 ident
.f
[col
] = 1.0f
;
1539 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1541 ir_rvalue
*const lhs
=
1542 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1544 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1545 instructions
->push_tail(inst
);
1549 /* Assign columns from the source matrix to the destination matrix.
1551 * Since the parameter will be used in the RHS of multiple assignments,
1552 * generate a temporary and copy the paramter there.
1554 ir_variable
*const rhs_var
=
1555 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1557 instructions
->push_tail(rhs_var
);
1559 ir_dereference
*const rhs_var_ref
=
1560 new(ctx
) ir_dereference_variable(rhs_var
);
1561 ir_instruction
*const inst
=
1562 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1563 instructions
->push_tail(inst
);
1565 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1566 var
->type
->vector_elements
);
1567 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1568 var
->type
->matrix_columns
);
1570 unsigned swiz
[4] = { 0, 0, 0, 0 };
1571 for (unsigned i
= 1; i
< last_row
; i
++)
1574 const unsigned write_mask
= (1U << last_row
) - 1;
1576 for (unsigned i
= 0; i
< last_col
; i
++) {
1577 ir_dereference
*const lhs
=
1578 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1579 ir_rvalue
*const rhs_col
=
1580 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1582 /* If one matrix has columns that are smaller than the columns of the
1583 * other matrix, wrap the column access of the larger with a swizzle
1584 * so that the LHS and RHS of the assignment have the same size (and
1585 * therefore have the same type).
1587 * It would be perfectly valid to unconditionally generate the
1588 * swizzles, this this will typically result in a more compact IR tree.
1591 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1592 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1597 ir_instruction
*inst
=
1598 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1599 instructions
->push_tail(inst
);
1602 const unsigned cols
= type
->matrix_columns
;
1603 const unsigned rows
= type
->vector_elements
;
1604 unsigned remaining_slots
= rows
* cols
;
1605 unsigned col_idx
= 0;
1606 unsigned row_idx
= 0;
1608 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1609 unsigned rhs_components
= rhs
->type
->components();
1610 unsigned rhs_base
= 0;
1612 if (remaining_slots
== 0)
1615 /* Since the parameter might be used in the RHS of two assignments,
1616 * generate a temporary and copy the paramter there.
1618 ir_variable
*rhs_var
=
1619 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1620 instructions
->push_tail(rhs_var
);
1622 ir_dereference
*rhs_var_ref
=
1623 new(ctx
) ir_dereference_variable(rhs_var
);
1624 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1625 instructions
->push_tail(inst
);
1628 /* Assign the current parameter to as many components of the matrix
1631 * NOTE: A single vector parameter can span two matrix columns. A
1632 * single vec4, for example, can completely fill a mat2.
1634 unsigned count
= MIN2(rows
- row_idx
,
1635 rhs_components
- rhs_base
);
1637 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1638 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1643 instructions
->push_tail(inst
);
1646 remaining_slots
-= count
;
1648 /* Sometimes, there is still data left in the parameters and
1649 * components left to be set in the destination but in other
1652 if (row_idx
>= rows
) {
1656 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1660 return new(ctx
) ir_dereference_variable(var
);
1665 emit_inline_record_constructor(const glsl_type
*type
,
1666 exec_list
*instructions
,
1667 exec_list
*parameters
,
1670 ir_variable
*const var
=
1671 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1672 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1674 instructions
->push_tail(var
);
1676 exec_node
*node
= parameters
->head
;
1677 for (unsigned i
= 0; i
< type
->length
; i
++) {
1678 assert(!node
->is_tail_sentinel());
1680 ir_dereference
*const lhs
=
1681 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1682 type
->fields
.structure
[i
].name
);
1684 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1685 assert(rhs
!= NULL
);
1687 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1689 instructions
->push_tail(assign
);
1698 process_record_constructor(exec_list
*instructions
,
1699 const glsl_type
*constructor_type
,
1700 YYLTYPE
*loc
, exec_list
*parameters
,
1701 struct _mesa_glsl_parse_state
*state
)
1704 exec_list actual_parameters
;
1706 process_parameters(instructions
, &actual_parameters
,
1709 exec_node
*node
= actual_parameters
.head
;
1710 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1711 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1713 if (node
->is_tail_sentinel()) {
1714 _mesa_glsl_error(loc
, state
,
1715 "insufficient parameters to constructor for `%s'",
1716 constructor_type
->name
);
1717 return ir_rvalue::error_value(ctx
);
1720 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1722 node
->replace_with(ir
);
1724 _mesa_glsl_error(loc
, state
,
1725 "parameter type mismatch in constructor for `%s.%s' "
1727 constructor_type
->name
,
1728 constructor_type
->fields
.structure
[i
].name
,
1730 constructor_type
->fields
.structure
[i
].type
->name
);
1731 return ir_rvalue::error_value(ctx
);
1737 if (!node
->is_tail_sentinel()) {
1738 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1739 "for `%s'", constructor_type
->name
);
1740 return ir_rvalue::error_value(ctx
);
1743 ir_rvalue
*const constant
=
1744 constant_record_constructor(constructor_type
, &actual_parameters
,
1747 return (constant
!= NULL
)
1749 : emit_inline_record_constructor(constructor_type
, instructions
,
1750 &actual_parameters
, state
);
1754 ast_function_expression::handle_method(exec_list
*instructions
,
1755 struct _mesa_glsl_parse_state
*state
)
1757 const ast_expression
*field
= subexpressions
[0];
1761 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1762 YYLTYPE loc
= get_location();
1763 state
->check_version(120, 300, &loc
, "methods not supported");
1766 method
= field
->primary_expression
.identifier
;
1768 /* This would prevent to raise "uninitialized variable" warnings when
1769 * calling array.length.
1771 field
->subexpressions
[0]->set_is_lhs(true);
1772 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1773 if (strcmp(method
, "length") == 0) {
1774 if (!this->expressions
.is_empty()) {
1775 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1779 if (op
->type
->is_array()) {
1780 if (op
->type
->is_unsized_array()) {
1781 if (!state
->has_shader_storage_buffer_objects()) {
1782 _mesa_glsl_error(&loc
, state
, "length called on unsized array"
1783 " only available with "
1784 "ARB_shader_storage_buffer_object");
1786 /* Calculate length of an unsized array in run-time */
1787 result
= new(ctx
) ir_expression(ir_unop_ssbo_unsized_array_length
, op
);
1789 result
= new(ctx
) ir_constant(op
->type
->array_size());
1791 } else if (op
->type
->is_vector()) {
1792 if (state
->has_420pack()) {
1793 /* .length() returns int. */
1794 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1796 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1797 "with ARB_shading_language_420pack");
1800 } else if (op
->type
->is_matrix()) {
1801 if (state
->has_420pack()) {
1802 /* .length() returns int. */
1803 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1805 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1806 "with ARB_shading_language_420pack");
1810 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1814 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1819 return ir_rvalue::error_value(ctx
);
1823 ast_function_expression::hir(exec_list
*instructions
,
1824 struct _mesa_glsl_parse_state
*state
)
1827 /* There are three sorts of function calls.
1829 * 1. constructors - The first subexpression is an ast_type_specifier.
1830 * 2. methods - Only the .length() method of array types.
1831 * 3. functions - Calls to regular old functions.
1834 if (is_constructor()) {
1835 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1836 YYLTYPE loc
= type
->get_location();
1839 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1841 /* constructor_type can be NULL if a variable with the same name as the
1842 * structure has come into scope.
1844 if (constructor_type
== NULL
) {
1845 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1846 "may be shadowed by a variable with the same name)",
1848 return ir_rvalue::error_value(ctx
);
1852 /* Constructors for opaque types are illegal.
1854 if (constructor_type
->contains_opaque()) {
1855 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1856 constructor_type
->name
);
1857 return ir_rvalue::error_value(ctx
);
1860 if (constructor_type
->is_subroutine()) {
1861 _mesa_glsl_error(& loc
, state
, "subroutine name cannot be a constructor `%s'",
1862 constructor_type
->name
);
1863 return ir_rvalue::error_value(ctx
);
1866 if (constructor_type
->is_array()) {
1867 if (!state
->check_version(120, 300, &loc
,
1868 "array constructors forbidden")) {
1869 return ir_rvalue::error_value(ctx
);
1872 return process_array_constructor(instructions
, constructor_type
,
1873 & loc
, &this->expressions
, state
);
1877 /* There are two kinds of constructor calls. Constructors for arrays and
1878 * structures must have the exact number of arguments with matching types
1879 * in the correct order. These constructors follow essentially the same
1880 * type matching rules as functions.
1882 * Constructors for built-in language types, such as mat4 and vec2, are
1883 * free form. The only requirements are that the parameters must provide
1884 * enough values of the correct scalar type and that no arguments are
1885 * given past the last used argument.
1887 * When using the C-style initializer syntax from GLSL 4.20, constructors
1888 * must have the exact number of arguments with matching types in the
1891 if (constructor_type
->is_record()) {
1892 return process_record_constructor(instructions
, constructor_type
,
1893 &loc
, &this->expressions
,
1897 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1898 return ir_rvalue::error_value(ctx
);
1900 /* Total number of components of the type being constructed. */
1901 const unsigned type_components
= constructor_type
->components();
1903 /* Number of components from parameters that have actually been
1904 * consumed. This is used to perform several kinds of error checking.
1906 unsigned components_used
= 0;
1908 unsigned matrix_parameters
= 0;
1909 unsigned nonmatrix_parameters
= 0;
1910 exec_list actual_parameters
;
1912 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1913 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1915 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1917 * "It is an error to provide extra arguments beyond this
1918 * last used argument."
1920 if (components_used
>= type_components
) {
1921 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1923 constructor_type
->name
);
1924 return ir_rvalue::error_value(ctx
);
1927 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1928 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1929 "non-numeric data type",
1930 constructor_type
->name
);
1931 return ir_rvalue::error_value(ctx
);
1934 /* Count the number of matrix and nonmatrix parameters. This
1935 * is used below to enforce some of the constructor rules.
1937 if (result
->type
->is_matrix())
1938 matrix_parameters
++;
1940 nonmatrix_parameters
++;
1942 actual_parameters
.push_tail(result
);
1943 components_used
+= result
->type
->components();
1946 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1948 * "It is an error to construct matrices from other matrices. This
1949 * is reserved for future use."
1951 if (matrix_parameters
> 0
1952 && constructor_type
->is_matrix()
1953 && !state
->check_version(120, 100, &loc
,
1954 "cannot construct `%s' from a matrix",
1955 constructor_type
->name
)) {
1956 return ir_rvalue::error_value(ctx
);
1959 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1961 * "If a matrix argument is given to a matrix constructor, it is
1962 * an error to have any other arguments."
1964 if ((matrix_parameters
> 0)
1965 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1966 && constructor_type
->is_matrix()) {
1967 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1968 "matrix must be only parameter",
1969 constructor_type
->name
);
1970 return ir_rvalue::error_value(ctx
);
1973 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1975 * "In these cases, there must be enough components provided in the
1976 * arguments to provide an initializer for every component in the
1977 * constructed value."
1979 if (components_used
< type_components
&& components_used
!= 1
1980 && matrix_parameters
== 0) {
1981 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1983 constructor_type
->name
);
1984 return ir_rvalue::error_value(ctx
);
1987 /* Matrices can never be consumed as is by any constructor but matrix
1988 * constructors. If the constructor type is not matrix, always break the
1989 * matrix up into a series of column vectors.
1991 if (!constructor_type
->is_matrix()) {
1992 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
1993 if (!matrix
->type
->is_matrix())
1996 /* Create a temporary containing the matrix. */
1997 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1999 instructions
->push_tail(var
);
2000 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
2001 ir_dereference_variable(var
), matrix
, NULL
));
2002 var
->constant_value
= matrix
->constant_expression_value();
2004 /* Replace the matrix with dereferences of its columns. */
2005 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
2006 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
2007 new(ctx
) ir_constant(i
)));
2013 bool all_parameters_are_constant
= true;
2015 /* Type cast each parameter and, if possible, fold constants.*/
2016 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
2017 const glsl_type
*desired_type
=
2018 glsl_type::get_instance(constructor_type
->base_type
,
2019 ir
->type
->vector_elements
,
2020 ir
->type
->matrix_columns
);
2021 ir_rvalue
*result
= convert_component(ir
, desired_type
);
2023 /* Attempt to convert the parameter to a constant valued expression.
2024 * After doing so, track whether or not all the parameters to the
2025 * constructor are trivially constant valued expressions.
2027 ir_rvalue
*const constant
= result
->constant_expression_value();
2029 if (constant
!= NULL
)
2032 all_parameters_are_constant
= false;
2035 ir
->replace_with(result
);
2039 /* If all of the parameters are trivially constant, create a
2040 * constant representing the complete collection of parameters.
2042 if (all_parameters_are_constant
) {
2043 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
2044 } else if (constructor_type
->is_scalar()) {
2045 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
2047 } else if (constructor_type
->is_vector()) {
2048 return emit_inline_vector_constructor(constructor_type
,
2053 assert(constructor_type
->is_matrix());
2054 return emit_inline_matrix_constructor(constructor_type
,
2059 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
2060 return handle_method(instructions
, state
);
2062 const ast_expression
*id
= subexpressions
[0];
2063 const char *func_name
;
2064 YYLTYPE loc
= get_location();
2065 exec_list actual_parameters
;
2066 ir_variable
*sub_var
= NULL
;
2067 ir_rvalue
*array_idx
= NULL
;
2069 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
2072 if (id
->oper
== ast_array_index
) {
2073 array_idx
= generate_array_index(ctx
, instructions
, state
, loc
,
2074 id
->subexpressions
[0],
2075 id
->subexpressions
[1], &func_name
,
2076 &actual_parameters
);
2078 func_name
= id
->primary_expression
.identifier
;
2081 /* an error was emitted earlier */
2083 return ir_rvalue::error_value(ctx
);
2085 ir_function_signature
*sig
=
2086 match_function_by_name(func_name
, &actual_parameters
, state
);
2088 ir_rvalue
*value
= NULL
;
2090 sig
= match_subroutine_by_name(func_name
, &actual_parameters
, state
, &sub_var
);
2094 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
2095 value
= ir_rvalue::error_value(ctx
);
2096 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
2097 /* an error has already been emitted */
2098 value
= ir_rvalue::error_value(ctx
);
2100 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
, array_idx
, state
);
2102 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
2105 instructions
->push_tail(tmp
);
2106 value
= new(ctx
) ir_dereference_variable(tmp
);
2113 unreachable("not reached");
2117 ast_function_expression::has_sequence_subexpression() const
2119 foreach_list_typed(const ast_node
, ast
, link
, &this->expressions
) {
2120 if (ast
->has_sequence_subexpression())
2128 ast_aggregate_initializer::hir(exec_list
*instructions
,
2129 struct _mesa_glsl_parse_state
*state
)
2132 YYLTYPE loc
= this->get_location();
2134 if (!this->constructor_type
) {
2135 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
2136 return ir_rvalue::error_value(ctx
);
2138 const glsl_type
*const constructor_type
= this->constructor_type
;
2140 if (!state
->has_420pack()) {
2141 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
2142 "GL_ARB_shading_language_420pack extension");
2143 return ir_rvalue::error_value(ctx
);
2146 if (constructor_type
->is_array()) {
2147 return process_array_constructor(instructions
, constructor_type
, &loc
,
2148 &this->expressions
, state
);
2151 if (constructor_type
->is_record()) {
2152 return process_record_constructor(instructions
, constructor_type
, &loc
,
2153 &this->expressions
, state
);
2156 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
2157 &this->expressions
, state
);