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 "ir_reader.h"
25 #include "glsl_parser_extras.h"
26 #include "glsl_types.h"
27 #include "s_expression.h"
29 const static bool debug
= false;
33 ir_reader(_mesa_glsl_parse_state
*);
35 void read(exec_list
*instructions
, const char *src
, bool scan_for_protos
);
39 _mesa_glsl_parse_state
*state
;
41 void ir_read_error(s_expression
*, const char *fmt
, ...);
43 const glsl_type
*read_type(s_expression
*);
45 void scan_for_prototypes(exec_list
*, s_expression
*);
46 ir_function
*read_function(s_expression
*, bool skip_body
);
47 void read_function_sig(ir_function
*, s_expression
*, bool skip_body
);
49 void read_instructions(exec_list
*, s_expression
*, ir_loop
*);
50 ir_instruction
*read_instruction(s_expression
*, ir_loop
*);
51 ir_variable
*read_declaration(s_expression
*);
52 ir_if
*read_if(s_expression
*, ir_loop
*);
53 ir_loop
*read_loop(s_expression
*);
54 ir_call
*read_call(s_expression
*);
55 ir_return
*read_return(s_expression
*);
56 ir_rvalue
*read_rvalue(s_expression
*);
57 ir_assignment
*read_assignment(s_expression
*);
58 ir_expression
*read_expression(s_expression
*);
59 ir_swizzle
*read_swizzle(s_expression
*);
60 ir_constant
*read_constant(s_expression
*);
61 ir_texture
*read_texture(s_expression
*);
63 ir_dereference
*read_dereference(s_expression
*);
64 ir_dereference_variable
*read_var_ref(s_expression
*);
67 ir_reader::ir_reader(_mesa_glsl_parse_state
*state
) : state(state
)
69 this->mem_ctx
= state
;
73 _mesa_glsl_read_ir(_mesa_glsl_parse_state
*state
, exec_list
*instructions
,
74 const char *src
, bool scan_for_protos
)
77 r
.read(instructions
, src
, scan_for_protos
);
81 ir_reader::read(exec_list
*instructions
, const char *src
, bool scan_for_protos
)
83 void *sx_mem_ctx
= ralloc_context(NULL
);
84 s_expression
*expr
= s_expression::read_expression(sx_mem_ctx
, src
);
86 ir_read_error(NULL
, "couldn't parse S-Expression.");
90 if (scan_for_protos
) {
91 scan_for_prototypes(instructions
, expr
);
96 read_instructions(instructions
, expr
, NULL
);
97 ralloc_free(sx_mem_ctx
);
100 validate_ir_tree(instructions
);
104 ir_reader::ir_read_error(s_expression
*expr
, const char *fmt
, ...)
110 if (state
->current_function
!= NULL
)
111 ralloc_asprintf_append(&state
->info_log
, "In function %s:\n",
112 state
->current_function
->function_name());
113 ralloc_strcat(&state
->info_log
, "error: ");
116 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
118 ralloc_strcat(&state
->info_log
, "\n");
121 ralloc_strcat(&state
->info_log
, "...in this context:\n ");
123 ralloc_strcat(&state
->info_log
, "\n\n");
128 ir_reader::read_type(s_expression
*expr
)
130 s_expression
*s_base_type
;
133 s_pattern pat
[] = { "array", s_base_type
, s_size
};
134 if (MATCH(expr
, pat
)) {
135 const glsl_type
*base_type
= read_type(s_base_type
);
136 if (base_type
== NULL
) {
137 ir_read_error(NULL
, "when reading base type of array type");
141 return glsl_type::get_array_instance(base_type
, s_size
->value());
144 s_symbol
*type_sym
= SX_AS_SYMBOL(expr
);
145 if (type_sym
== NULL
) {
146 ir_read_error(expr
, "expected <type>");
150 const glsl_type
*type
= state
->symbols
->get_type(type_sym
->value());
152 ir_read_error(expr
, "invalid type: %s", type_sym
->value());
159 ir_reader::scan_for_prototypes(exec_list
*instructions
, s_expression
*expr
)
161 s_list
*list
= SX_AS_LIST(expr
);
163 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
167 foreach_iter(exec_list_iterator
, it
, list
->subexpressions
) {
168 s_list
*sub
= SX_AS_LIST(it
.get());
170 continue; // not a (function ...); ignore it.
172 s_symbol
*tag
= SX_AS_SYMBOL(sub
->subexpressions
.get_head());
173 if (tag
== NULL
|| strcmp(tag
->value(), "function") != 0)
174 continue; // not a (function ...); ignore it.
176 ir_function
*f
= read_function(sub
, true);
179 instructions
->push_tail(f
);
184 ir_reader::read_function(s_expression
*expr
, bool skip_body
)
189 s_pattern pat
[] = { "function", name
};
190 if (!PARTIAL_MATCH(expr
, pat
)) {
191 ir_read_error(expr
, "Expected (function <name> (signature ...) ...)");
195 ir_function
*f
= state
->symbols
->get_function(name
->value());
197 f
= new(mem_ctx
) ir_function(name
->value());
198 added
= state
->symbols
->add_function(f
);
202 exec_list_iterator it
= ((s_list
*) expr
)->subexpressions
.iterator();
203 it
.next(); // skip "function" tag
204 it
.next(); // skip function name
205 for (/* nothing */; it
.has_next(); it
.next()) {
206 s_expression
*s_sig
= (s_expression
*) it
.get();
207 read_function_sig(f
, s_sig
, skip_body
);
209 return added
? f
: NULL
;
213 ir_reader::read_function_sig(ir_function
*f
, s_expression
*expr
, bool skip_body
)
215 s_expression
*type_expr
;
219 s_pattern pat
[] = { "signature", type_expr
, paramlist
, body_list
};
220 if (!MATCH(expr
, pat
)) {
221 ir_read_error(expr
, "Expected (signature <type> (parameters ...) "
222 "(<instruction> ...))");
226 const glsl_type
*return_type
= read_type(type_expr
);
227 if (return_type
== NULL
)
230 s_symbol
*paramtag
= SX_AS_SYMBOL(paramlist
->subexpressions
.get_head());
231 if (paramtag
== NULL
|| strcmp(paramtag
->value(), "parameters") != 0) {
232 ir_read_error(paramlist
, "Expected (parameters ...)");
236 // Read the parameters list into a temporary place.
237 exec_list hir_parameters
;
238 state
->symbols
->push_scope();
240 exec_list_iterator it
= paramlist
->subexpressions
.iterator();
241 for (it
.next() /* skip "parameters" */; it
.has_next(); it
.next()) {
242 ir_variable
*var
= read_declaration((s_expression
*) it
.get());
246 hir_parameters
.push_tail(var
);
249 ir_function_signature
*sig
= f
->exact_matching_signature(&hir_parameters
);
250 if (sig
== NULL
&& skip_body
) {
251 /* If scanning for prototypes, generate a new signature. */
252 sig
= new(mem_ctx
) ir_function_signature(return_type
);
253 sig
->is_builtin
= true;
254 f
->add_signature(sig
);
255 } else if (sig
!= NULL
) {
256 const char *badvar
= sig
->qualifiers_match(&hir_parameters
);
257 if (badvar
!= NULL
) {
258 ir_read_error(expr
, "function `%s' parameter `%s' qualifiers "
259 "don't match prototype", f
->name
, badvar
);
263 if (sig
->return_type
!= return_type
) {
264 ir_read_error(expr
, "function `%s' return type doesn't "
265 "match prototype", f
->name
);
269 /* No prototype for this body exists - skip it. */
270 state
->symbols
->pop_scope();
275 sig
->replace_parameters(&hir_parameters
);
277 if (!skip_body
&& !body_list
->subexpressions
.is_empty()) {
278 if (sig
->is_defined
) {
279 ir_read_error(expr
, "function %s redefined", f
->name
);
282 state
->current_function
= sig
;
283 read_instructions(&sig
->body
, body_list
, NULL
);
284 state
->current_function
= NULL
;
285 sig
->is_defined
= true;
288 state
->symbols
->pop_scope();
292 ir_reader::read_instructions(exec_list
*instructions
, s_expression
*expr
,
295 // Read in a list of instructions
296 s_list
*list
= SX_AS_LIST(expr
);
298 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
302 foreach_iter(exec_list_iterator
, it
, list
->subexpressions
) {
303 s_expression
*sub
= (s_expression
*) it
.get();
304 ir_instruction
*ir
= read_instruction(sub
, loop_ctx
);
306 /* Global variable declarations should be moved to the top, before
307 * any functions that might use them. Functions are added to the
308 * instruction stream when scanning for prototypes, so without this
309 * hack, they always appear before variable declarations.
311 if (state
->current_function
== NULL
&& ir
->as_variable() != NULL
)
312 instructions
->push_head(ir
);
314 instructions
->push_tail(ir
);
321 ir_reader::read_instruction(s_expression
*expr
, ir_loop
*loop_ctx
)
323 s_symbol
*symbol
= SX_AS_SYMBOL(expr
);
324 if (symbol
!= NULL
) {
325 if (strcmp(symbol
->value(), "break") == 0 && loop_ctx
!= NULL
)
326 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_break
);
327 if (strcmp(symbol
->value(), "continue") == 0 && loop_ctx
!= NULL
)
328 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_continue
);
331 s_list
*list
= SX_AS_LIST(expr
);
332 if (list
== NULL
|| list
->subexpressions
.is_empty()) {
333 ir_read_error(expr
, "Invalid instruction.\n");
337 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
339 ir_read_error(expr
, "expected instruction tag");
343 ir_instruction
*inst
= NULL
;
344 if (strcmp(tag
->value(), "declare") == 0) {
345 inst
= read_declaration(list
);
346 } else if (strcmp(tag
->value(), "assign") == 0) {
347 inst
= read_assignment(list
);
348 } else if (strcmp(tag
->value(), "if") == 0) {
349 inst
= read_if(list
, loop_ctx
);
350 } else if (strcmp(tag
->value(), "loop") == 0) {
351 inst
= read_loop(list
);
352 } else if (strcmp(tag
->value(), "call") == 0) {
353 inst
= read_call(list
);
354 } else if (strcmp(tag
->value(), "return") == 0) {
355 inst
= read_return(list
);
356 } else if (strcmp(tag
->value(), "function") == 0) {
357 inst
= read_function(list
, false);
359 inst
= read_rvalue(list
);
361 ir_read_error(NULL
, "when reading instruction");
367 ir_reader::read_declaration(s_expression
*expr
)
370 s_expression
*s_type
;
373 s_pattern pat
[] = { "declare", s_quals
, s_type
, s_name
};
374 if (!MATCH(expr
, pat
)) {
375 ir_read_error(expr
, "expected (declare (<qualifiers>) <type> <name>)");
379 const glsl_type
*type
= read_type(s_type
);
383 ir_variable
*var
= new(mem_ctx
) ir_variable(type
, s_name
->value(),
386 foreach_iter(exec_list_iterator
, it
, s_quals
->subexpressions
) {
387 s_symbol
*qualifier
= SX_AS_SYMBOL(it
.get());
388 if (qualifier
== NULL
) {
389 ir_read_error(expr
, "qualifier list must contain only symbols");
393 // FINISHME: Check for duplicate/conflicting qualifiers.
394 if (strcmp(qualifier
->value(), "centroid") == 0) {
396 } else if (strcmp(qualifier
->value(), "invariant") == 0) {
398 } else if (strcmp(qualifier
->value(), "uniform") == 0) {
399 var
->mode
= ir_var_uniform
;
400 } else if (strcmp(qualifier
->value(), "auto") == 0) {
401 var
->mode
= ir_var_auto
;
402 } else if (strcmp(qualifier
->value(), "in") == 0) {
403 var
->mode
= ir_var_in
;
404 } else if (strcmp(qualifier
->value(), "const_in") == 0) {
405 var
->mode
= ir_var_const_in
;
406 } else if (strcmp(qualifier
->value(), "out") == 0) {
407 var
->mode
= ir_var_out
;
408 } else if (strcmp(qualifier
->value(), "inout") == 0) {
409 var
->mode
= ir_var_inout
;
410 } else if (strcmp(qualifier
->value(), "temporary") == 0) {
411 var
->mode
= ir_var_temporary
;
412 } else if (strcmp(qualifier
->value(), "smooth") == 0) {
413 var
->interpolation
= INTERP_QUALIFIER_SMOOTH
;
414 } else if (strcmp(qualifier
->value(), "flat") == 0) {
415 var
->interpolation
= INTERP_QUALIFIER_FLAT
;
416 } else if (strcmp(qualifier
->value(), "noperspective") == 0) {
417 var
->interpolation
= INTERP_QUALIFIER_NOPERSPECTIVE
;
419 ir_read_error(expr
, "unknown qualifier: %s", qualifier
->value());
424 // Add the variable to the symbol table
425 state
->symbols
->add_variable(var
);
432 ir_reader::read_if(s_expression
*expr
, ir_loop
*loop_ctx
)
434 s_expression
*s_cond
;
435 s_expression
*s_then
;
436 s_expression
*s_else
;
438 s_pattern pat
[] = { "if", s_cond
, s_then
, s_else
};
439 if (!MATCH(expr
, pat
)) {
440 ir_read_error(expr
, "expected (if <condition> (<then>...) (<else>...))");
444 ir_rvalue
*condition
= read_rvalue(s_cond
);
445 if (condition
== NULL
) {
446 ir_read_error(NULL
, "when reading condition of (if ...)");
450 ir_if
*iff
= new(mem_ctx
) ir_if(condition
);
452 read_instructions(&iff
->then_instructions
, s_then
, loop_ctx
);
453 read_instructions(&iff
->else_instructions
, s_else
, loop_ctx
);
463 ir_reader::read_loop(s_expression
*expr
)
465 s_expression
*s_counter
, *s_from
, *s_to
, *s_inc
, *s_body
;
467 s_pattern pat
[] = { "loop", s_counter
, s_from
, s_to
, s_inc
, s_body
};
468 if (!MATCH(expr
, pat
)) {
469 ir_read_error(expr
, "expected (loop <counter> <from> <to> "
470 "<increment> <body>)");
474 // FINISHME: actually read the count/from/to fields.
476 ir_loop
*loop
= new(mem_ctx
) ir_loop
;
477 read_instructions(&loop
->body_instructions
, s_body
, loop
);
487 ir_reader::read_return(s_expression
*expr
)
489 s_expression
*s_retval
;
491 s_pattern return_value_pat
[] = { "return", s_retval
};
492 s_pattern return_void_pat
[] = { "return" };
493 if (MATCH(expr
, return_value_pat
)) {
494 ir_rvalue
*retval
= read_rvalue(s_retval
);
495 if (retval
== NULL
) {
496 ir_read_error(NULL
, "when reading return value");
499 return new(mem_ctx
) ir_return(retval
);
500 } else if (MATCH(expr
, return_void_pat
)) {
501 return new(mem_ctx
) ir_return
;
503 ir_read_error(expr
, "expected (return <rvalue>) or (return)");
510 ir_reader::read_rvalue(s_expression
*expr
)
512 s_list
*list
= SX_AS_LIST(expr
);
513 if (list
== NULL
|| list
->subexpressions
.is_empty())
516 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
518 ir_read_error(expr
, "expected rvalue tag");
522 ir_rvalue
*rvalue
= read_dereference(list
);
523 if (rvalue
!= NULL
|| state
->error
)
525 else if (strcmp(tag
->value(), "swiz") == 0) {
526 rvalue
= read_swizzle(list
);
527 } else if (strcmp(tag
->value(), "expression") == 0) {
528 rvalue
= read_expression(list
);
529 } else if (strcmp(tag
->value(), "constant") == 0) {
530 rvalue
= read_constant(list
);
532 rvalue
= read_texture(list
);
533 if (rvalue
== NULL
&& !state
->error
)
534 ir_read_error(expr
, "unrecognized rvalue tag: %s", tag
->value());
541 ir_reader::read_assignment(s_expression
*expr
)
543 s_expression
*cond_expr
= NULL
;
544 s_expression
*lhs_expr
, *rhs_expr
;
547 s_pattern pat4
[] = { "assign", mask_list
, lhs_expr
, rhs_expr
};
548 s_pattern pat5
[] = { "assign", cond_expr
, mask_list
, lhs_expr
, rhs_expr
};
549 if (!MATCH(expr
, pat4
) && !MATCH(expr
, pat5
)) {
550 ir_read_error(expr
, "expected (assign [<condition>] (<write mask>) "
555 ir_rvalue
*condition
= NULL
;
556 if (cond_expr
!= NULL
) {
557 condition
= read_rvalue(cond_expr
);
558 if (condition
== NULL
) {
559 ir_read_error(NULL
, "when reading condition of assignment");
566 s_symbol
*mask_symbol
;
567 s_pattern mask_pat
[] = { mask_symbol
};
568 if (MATCH(mask_list
, mask_pat
)) {
569 const char *mask_str
= mask_symbol
->value();
570 unsigned mask_length
= strlen(mask_str
);
571 if (mask_length
> 4) {
572 ir_read_error(expr
, "invalid write mask: %s", mask_str
);
576 const unsigned idx_map
[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
578 for (unsigned i
= 0; i
< mask_length
; i
++) {
579 if (mask_str
[i
] < 'w' || mask_str
[i
] > 'z') {
580 ir_read_error(expr
, "write mask contains invalid character: %c",
584 mask
|= 1 << idx_map
[mask_str
[i
] - 'w'];
586 } else if (!mask_list
->subexpressions
.is_empty()) {
587 ir_read_error(mask_list
, "expected () or (<write mask>)");
591 ir_dereference
*lhs
= read_dereference(lhs_expr
);
593 ir_read_error(NULL
, "when reading left-hand side of assignment");
597 ir_rvalue
*rhs
= read_rvalue(rhs_expr
);
599 ir_read_error(NULL
, "when reading right-hand side of assignment");
603 if (mask
== 0 && (lhs
->type
->is_vector() || lhs
->type
->is_scalar())) {
604 ir_read_error(expr
, "non-zero write mask required.");
608 return new(mem_ctx
) ir_assignment(lhs
, rhs
, condition
, mask
);
612 ir_reader::read_call(s_expression
*expr
)
616 s_list
*s_return
= NULL
;
618 ir_dereference_variable
*return_deref
= NULL
;
620 s_pattern void_pat
[] = { "call", name
, params
};
621 s_pattern non_void_pat
[] = { "call", name
, s_return
, params
};
622 if (MATCH(expr
, non_void_pat
)) {
623 return_deref
= read_var_ref(s_return
);
624 if (return_deref
== NULL
) {
625 ir_read_error(s_return
, "when reading a call's return storage");
628 } else if (!MATCH(expr
, void_pat
)) {
629 ir_read_error(expr
, "expected (call <name> [<deref>] (<param> ...))");
633 exec_list parameters
;
635 foreach_iter(exec_list_iterator
, it
, params
->subexpressions
) {
636 s_expression
*expr
= (s_expression
*) it
.get();
637 ir_rvalue
*param
= read_rvalue(expr
);
639 ir_read_error(expr
, "when reading parameter to function call");
642 parameters
.push_tail(param
);
645 ir_function
*f
= state
->symbols
->get_function(name
->value());
647 ir_read_error(expr
, "found call to undefined function %s",
652 ir_function_signature
*callee
= f
->matching_signature(¶meters
);
653 if (callee
== NULL
) {
654 ir_read_error(expr
, "couldn't find matching signature for function "
655 "%s", name
->value());
659 if (callee
->return_type
== glsl_type::void_type
&& return_deref
) {
660 ir_read_error(expr
, "call has return value storage but void type");
662 } else if (callee
->return_type
!= glsl_type::void_type
&& !return_deref
) {
663 ir_read_error(expr
, "call has non-void type but no return value storage");
667 return new(mem_ctx
) ir_call(callee
, return_deref
, ¶meters
);
671 ir_reader::read_expression(s_expression
*expr
)
673 s_expression
*s_type
;
675 s_expression
*s_arg1
;
677 s_pattern pat
[] = { "expression", s_type
, s_op
, s_arg1
};
678 if (!PARTIAL_MATCH(expr
, pat
)) {
679 ir_read_error(expr
, "expected (expression <type> <operator> "
680 "<operand> [<operand>])");
683 s_expression
*s_arg2
= (s_expression
*) s_arg1
->next
; // may be tail sentinel
685 const glsl_type
*type
= read_type(s_type
);
689 /* Read the operator */
690 ir_expression_operation op
= ir_expression::get_operator(s_op
->value());
691 if (op
== (ir_expression_operation
) -1) {
692 ir_read_error(expr
, "invalid operator: %s", s_op
->value());
696 unsigned num_operands
= ir_expression::get_num_operands(op
);
697 if (num_operands
== 1 && !s_arg1
->next
->is_tail_sentinel()) {
698 ir_read_error(expr
, "expected (expression <type> %s <operand>)",
703 ir_rvalue
*arg1
= read_rvalue(s_arg1
);
704 ir_rvalue
*arg2
= NULL
;
706 ir_read_error(NULL
, "when reading first operand of %s", s_op
->value());
710 if (num_operands
== 2) {
711 if (s_arg2
->is_tail_sentinel() || !s_arg2
->next
->is_tail_sentinel()) {
712 ir_read_error(expr
, "expected (expression <type> %s <operand> "
713 "<operand>)", s_op
->value());
716 arg2
= read_rvalue(s_arg2
);
718 ir_read_error(NULL
, "when reading second operand of %s",
724 return new(mem_ctx
) ir_expression(op
, type
, arg1
, arg2
);
728 ir_reader::read_swizzle(s_expression
*expr
)
733 s_pattern pat
[] = { "swiz", swiz
, sub
};
734 if (!MATCH(expr
, pat
)) {
735 ir_read_error(expr
, "expected (swiz <swizzle> <rvalue>)");
739 if (strlen(swiz
->value()) > 4) {
740 ir_read_error(expr
, "expected a valid swizzle; found %s", swiz
->value());
744 ir_rvalue
*rvalue
= read_rvalue(sub
);
748 ir_swizzle
*ir
= ir_swizzle::create(rvalue
, swiz
->value(),
749 rvalue
->type
->vector_elements
);
751 ir_read_error(expr
, "invalid swizzle");
757 ir_reader::read_constant(s_expression
*expr
)
759 s_expression
*type_expr
;
762 s_pattern pat
[] = { "constant", type_expr
, values
};
763 if (!MATCH(expr
, pat
)) {
764 ir_read_error(expr
, "expected (constant <type> (...))");
768 const glsl_type
*type
= read_type(type_expr
);
772 if (values
== NULL
) {
773 ir_read_error(expr
, "expected (constant <type> (...))");
777 if (type
->is_array()) {
778 unsigned elements_supplied
= 0;
780 foreach_iter(exec_list_iterator
, it
, values
->subexpressions
) {
781 s_expression
*elt
= (s_expression
*) it
.get();
782 ir_constant
*ir_elt
= read_constant(elt
);
785 elements
.push_tail(ir_elt
);
789 if (elements_supplied
!= type
->length
) {
790 ir_read_error(values
, "expected exactly %u array elements, "
791 "given %u", type
->length
, elements_supplied
);
794 return new(mem_ctx
) ir_constant(type
, &elements
);
797 ir_constant_data data
= { { 0 } };
799 // Read in list of values (at most 16).
801 foreach_iter(exec_list_iterator
, it
, values
->subexpressions
) {
803 ir_read_error(values
, "expected at most 16 numbers");
807 s_expression
*expr
= (s_expression
*) it
.get();
809 if (type
->base_type
== GLSL_TYPE_FLOAT
) {
810 s_number
*value
= SX_AS_NUMBER(expr
);
812 ir_read_error(values
, "expected numbers");
815 data
.f
[k
] = value
->fvalue();
817 s_int
*value
= SX_AS_INT(expr
);
819 ir_read_error(values
, "expected integers");
823 switch (type
->base_type
) {
824 case GLSL_TYPE_UINT
: {
825 data
.u
[k
] = value
->value();
828 case GLSL_TYPE_INT
: {
829 data
.i
[k
] = value
->value();
832 case GLSL_TYPE_BOOL
: {
833 data
.b
[k
] = value
->value();
837 ir_read_error(values
, "unsupported constant type");
843 if (k
!= type
->components()) {
844 ir_read_error(values
, "expected %u constant values, found %u",
845 type
->components(), k
);
849 return new(mem_ctx
) ir_constant(type
, &data
);
852 ir_dereference_variable
*
853 ir_reader::read_var_ref(s_expression
*expr
)
856 s_pattern var_pat
[] = { "var_ref", s_var
};
858 if (MATCH(expr
, var_pat
)) {
859 ir_variable
*var
= state
->symbols
->get_variable(s_var
->value());
861 ir_read_error(expr
, "undeclared variable: %s", s_var
->value());
864 return new(mem_ctx
) ir_dereference_variable(var
);
870 ir_reader::read_dereference(s_expression
*expr
)
872 s_expression
*s_subject
;
873 s_expression
*s_index
;
876 s_pattern array_pat
[] = { "array_ref", s_subject
, s_index
};
877 s_pattern record_pat
[] = { "record_ref", s_subject
, s_field
};
879 ir_dereference_variable
*var_ref
= read_var_ref(expr
);
880 if (var_ref
!= NULL
) {
882 } else if (MATCH(expr
, array_pat
)) {
883 ir_rvalue
*subject
= read_rvalue(s_subject
);
884 if (subject
== NULL
) {
885 ir_read_error(NULL
, "when reading the subject of an array_ref");
889 ir_rvalue
*idx
= read_rvalue(s_index
);
890 if (subject
== NULL
) {
891 ir_read_error(NULL
, "when reading the index of an array_ref");
894 return new(mem_ctx
) ir_dereference_array(subject
, idx
);
895 } else if (MATCH(expr
, record_pat
)) {
896 ir_rvalue
*subject
= read_rvalue(s_subject
);
897 if (subject
== NULL
) {
898 ir_read_error(NULL
, "when reading the subject of a record_ref");
901 return new(mem_ctx
) ir_dereference_record(subject
, s_field
->value());
907 ir_reader::read_texture(s_expression
*expr
)
909 s_symbol
*tag
= NULL
;
910 s_expression
*s_type
= NULL
;
911 s_expression
*s_sampler
= NULL
;
912 s_expression
*s_coord
= NULL
;
913 s_expression
*s_offset
= NULL
;
914 s_expression
*s_proj
= NULL
;
915 s_list
*s_shadow
= NULL
;
916 s_expression
*s_lod
= NULL
;
918 ir_texture_opcode op
= ir_tex
; /* silence warning */
920 s_pattern tex_pattern
[] =
921 { "tex", s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
};
922 s_pattern txf_pattern
[] =
923 { "txf", s_type
, s_sampler
, s_coord
, s_offset
, s_lod
};
924 s_pattern txs_pattern
[] =
925 { "txs", s_type
, s_sampler
, s_lod
};
926 s_pattern other_pattern
[] =
927 { tag
, s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
, s_lod
};
929 if (MATCH(expr
, tex_pattern
)) {
931 } else if (MATCH(expr
, txf_pattern
)) {
933 } else if (MATCH(expr
, txs_pattern
)) {
935 } else if (MATCH(expr
, other_pattern
)) {
936 op
= ir_texture::get_opcode(tag
->value());
940 ir_read_error(NULL
, "unexpected texture pattern");
944 ir_texture
*tex
= new(mem_ctx
) ir_texture(op
);
947 const glsl_type
*type
= read_type(s_type
);
949 ir_read_error(NULL
, "when reading type in (%s ...)",
950 tex
->opcode_string());
954 // Read sampler (must be a deref)
955 ir_dereference
*sampler
= read_dereference(s_sampler
);
956 if (sampler
== NULL
) {
957 ir_read_error(NULL
, "when reading sampler in (%s ...)",
958 tex
->opcode_string());
961 tex
->set_sampler(sampler
, type
);
964 // Read coordinate (any rvalue)
965 tex
->coordinate
= read_rvalue(s_coord
);
966 if (tex
->coordinate
== NULL
) {
967 ir_read_error(NULL
, "when reading coordinate in (%s ...)",
968 tex
->opcode_string());
972 // Read texel offset - either 0 or an rvalue.
973 s_int
*si_offset
= SX_AS_INT(s_offset
);
974 if (si_offset
== NULL
|| si_offset
->value() != 0) {
975 tex
->offset
= read_rvalue(s_offset
);
976 if (tex
->offset
== NULL
) {
977 ir_read_error(s_offset
, "expected 0 or an expression");
983 if (op
!= ir_txf
&& op
!= ir_txs
) {
984 s_int
*proj_as_int
= SX_AS_INT(s_proj
);
985 if (proj_as_int
&& proj_as_int
->value() == 1) {
986 tex
->projector
= NULL
;
988 tex
->projector
= read_rvalue(s_proj
);
989 if (tex
->projector
== NULL
) {
990 ir_read_error(NULL
, "when reading projective divide in (%s ..)",
991 tex
->opcode_string());
996 if (s_shadow
->subexpressions
.is_empty()) {
997 tex
->shadow_comparitor
= NULL
;
999 tex
->shadow_comparitor
= read_rvalue(s_shadow
);
1000 if (tex
->shadow_comparitor
== NULL
) {
1001 ir_read_error(NULL
, "when reading shadow comparitor in (%s ..)",
1002 tex
->opcode_string());
1010 tex
->lod_info
.bias
= read_rvalue(s_lod
);
1011 if (tex
->lod_info
.bias
== NULL
) {
1012 ir_read_error(NULL
, "when reading LOD bias in (txb ...)");
1019 tex
->lod_info
.lod
= read_rvalue(s_lod
);
1020 if (tex
->lod_info
.lod
== NULL
) {
1021 ir_read_error(NULL
, "when reading LOD in (%s ...)",
1022 tex
->opcode_string());
1027 s_expression
*s_dx
, *s_dy
;
1028 s_pattern dxdy_pat
[] = { s_dx
, s_dy
};
1029 if (!MATCH(s_lod
, dxdy_pat
)) {
1030 ir_read_error(s_lod
, "expected (dPdx dPdy) in (txd ...)");
1033 tex
->lod_info
.grad
.dPdx
= read_rvalue(s_dx
);
1034 if (tex
->lod_info
.grad
.dPdx
== NULL
) {
1035 ir_read_error(NULL
, "when reading dPdx in (txd ...)");
1038 tex
->lod_info
.grad
.dPdy
= read_rvalue(s_dy
);
1039 if (tex
->lod_info
.grad
.dPdy
== NULL
) {
1040 ir_read_error(NULL
, "when reading dPdy in (txd ...)");
1046 // tex doesn't have any extra parameters.