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 "compiler/glsl_types.h"
27 #include "s_expression.h"
29 static const bool debug
= false;
35 ir_reader(_mesa_glsl_parse_state
*);
37 void read(exec_list
*instructions
, const char *src
, bool scan_for_protos
);
41 _mesa_glsl_parse_state
*state
;
43 void ir_read_error(s_expression
*, const char *fmt
, ...);
45 const glsl_type
*read_type(s_expression
*);
47 void scan_for_prototypes(exec_list
*, s_expression
*);
48 ir_function
*read_function(s_expression
*, bool skip_body
);
49 void read_function_sig(ir_function
*, s_expression
*, bool skip_body
);
51 void read_instructions(exec_list
*, s_expression
*, ir_loop
*);
52 ir_instruction
*read_instruction(s_expression
*, ir_loop
*);
53 ir_variable
*read_declaration(s_expression
*);
54 ir_if
*read_if(s_expression
*, ir_loop
*);
55 ir_loop
*read_loop(s_expression
*);
56 ir_call
*read_call(s_expression
*);
57 ir_return
*read_return(s_expression
*);
58 ir_rvalue
*read_rvalue(s_expression
*);
59 ir_assignment
*read_assignment(s_expression
*);
60 ir_expression
*read_expression(s_expression
*);
61 ir_swizzle
*read_swizzle(s_expression
*);
62 ir_constant
*read_constant(s_expression
*);
63 ir_texture
*read_texture(s_expression
*);
64 ir_emit_vertex
*read_emit_vertex(s_expression
*);
65 ir_end_primitive
*read_end_primitive(s_expression
*);
66 ir_barrier
*read_barrier(s_expression
*);
68 ir_dereference
*read_dereference(s_expression
*);
69 ir_dereference_variable
*read_var_ref(s_expression
*);
72 } /* anonymous namespace */
74 ir_reader::ir_reader(_mesa_glsl_parse_state
*state
) : state(state
)
76 this->mem_ctx
= state
;
80 _mesa_glsl_read_ir(_mesa_glsl_parse_state
*state
, exec_list
*instructions
,
81 const char *src
, bool scan_for_protos
)
84 r
.read(instructions
, src
, scan_for_protos
);
88 ir_reader::read(exec_list
*instructions
, const char *src
, bool scan_for_protos
)
90 void *sx_mem_ctx
= ralloc_context(NULL
);
91 s_expression
*expr
= s_expression::read_expression(sx_mem_ctx
, src
);
93 ir_read_error(NULL
, "couldn't parse S-Expression.");
97 if (scan_for_protos
) {
98 scan_for_prototypes(instructions
, expr
);
103 read_instructions(instructions
, expr
, NULL
);
104 ralloc_free(sx_mem_ctx
);
107 validate_ir_tree(instructions
);
111 ir_reader::ir_read_error(s_expression
*expr
, const char *fmt
, ...)
117 if (state
->current_function
!= NULL
)
118 ralloc_asprintf_append(&state
->info_log
, "In function %s:\n",
119 state
->current_function
->function_name());
120 ralloc_strcat(&state
->info_log
, "error: ");
123 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
125 ralloc_strcat(&state
->info_log
, "\n");
128 ralloc_strcat(&state
->info_log
, "...in this context:\n ");
130 ralloc_strcat(&state
->info_log
, "\n\n");
135 ir_reader::read_type(s_expression
*expr
)
137 s_expression
*s_base_type
;
140 s_pattern pat
[] = { "array", s_base_type
, s_size
};
141 if (MATCH(expr
, pat
)) {
142 const glsl_type
*base_type
= read_type(s_base_type
);
143 if (base_type
== NULL
) {
144 ir_read_error(NULL
, "when reading base type of array type");
148 return glsl_type::get_array_instance(base_type
, s_size
->value());
151 s_symbol
*type_sym
= SX_AS_SYMBOL(expr
);
152 if (type_sym
== NULL
) {
153 ir_read_error(expr
, "expected <type>");
157 const glsl_type
*type
= state
->symbols
->get_type(type_sym
->value());
159 ir_read_error(expr
, "invalid type: %s", type_sym
->value());
166 ir_reader::scan_for_prototypes(exec_list
*instructions
, s_expression
*expr
)
168 s_list
*list
= SX_AS_LIST(expr
);
170 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
174 foreach_in_list(s_list
, sub
, &list
->subexpressions
) {
176 continue; // not a (function ...); ignore it.
178 s_symbol
*tag
= SX_AS_SYMBOL(sub
->subexpressions
.get_head());
179 if (tag
== NULL
|| strcmp(tag
->value(), "function") != 0)
180 continue; // not a (function ...); ignore it.
182 ir_function
*f
= read_function(sub
, true);
185 instructions
->push_tail(f
);
190 ir_reader::read_function(s_expression
*expr
, bool skip_body
)
195 s_pattern pat
[] = { "function", name
};
196 if (!PARTIAL_MATCH(expr
, pat
)) {
197 ir_read_error(expr
, "Expected (function <name> (signature ...) ...)");
201 ir_function
*f
= state
->symbols
->get_function(name
->value());
203 f
= new(mem_ctx
) ir_function(name
->value());
204 added
= state
->symbols
->add_function(f
);
208 /* Skip over "function" tag and function name (which are guaranteed to be
209 * present by the above PARTIAL_MATCH call).
211 exec_node
*node
= ((s_list
*) expr
)->subexpressions
.get_head_raw()->next
->next
;
212 for (/* nothing */; !node
->is_tail_sentinel(); node
= node
->next
) {
213 s_expression
*s_sig
= (s_expression
*) node
;
214 read_function_sig(f
, s_sig
, skip_body
);
216 return added
? f
: NULL
;
220 always_available(const _mesa_glsl_parse_state
*)
226 ir_reader::read_function_sig(ir_function
*f
, s_expression
*expr
, bool skip_body
)
228 s_expression
*type_expr
;
232 s_pattern pat
[] = { "signature", type_expr
, paramlist
, body_list
};
233 if (!MATCH(expr
, pat
)) {
234 ir_read_error(expr
, "Expected (signature <type> (parameters ...) "
235 "(<instruction> ...))");
239 const glsl_type
*return_type
= read_type(type_expr
);
240 if (return_type
== NULL
)
243 s_symbol
*paramtag
= SX_AS_SYMBOL(paramlist
->subexpressions
.get_head());
244 if (paramtag
== NULL
|| strcmp(paramtag
->value(), "parameters") != 0) {
245 ir_read_error(paramlist
, "Expected (parameters ...)");
249 // Read the parameters list into a temporary place.
250 exec_list hir_parameters
;
251 state
->symbols
->push_scope();
253 /* Skip over the "parameters" tag. */
254 exec_node
*node
= paramlist
->subexpressions
.get_head_raw()->next
;
255 for (/* nothing */; !node
->is_tail_sentinel(); node
= node
->next
) {
256 ir_variable
*var
= read_declaration((s_expression
*) node
);
260 hir_parameters
.push_tail(var
);
263 ir_function_signature
*sig
=
264 f
->exact_matching_signature(state
, &hir_parameters
);
265 if (sig
== NULL
&& skip_body
) {
266 /* If scanning for prototypes, generate a new signature. */
267 /* ir_reader doesn't know what languages support a given built-in, so
268 * just say that they're always available. For now, other mechanisms
269 * guarantee the right built-ins are available.
271 sig
= new(mem_ctx
) ir_function_signature(return_type
, always_available
);
272 f
->add_signature(sig
);
273 } else if (sig
!= NULL
) {
274 const char *badvar
= sig
->qualifiers_match(&hir_parameters
);
275 if (badvar
!= NULL
) {
276 ir_read_error(expr
, "function `%s' parameter `%s' qualifiers "
277 "don't match prototype", f
->name
, badvar
);
281 if (sig
->return_type
!= return_type
) {
282 ir_read_error(expr
, "function `%s' return type doesn't "
283 "match prototype", f
->name
);
287 /* No prototype for this body exists - skip it. */
288 state
->symbols
->pop_scope();
293 sig
->replace_parameters(&hir_parameters
);
295 if (!skip_body
&& !body_list
->subexpressions
.is_empty()) {
296 if (sig
->is_defined
) {
297 ir_read_error(expr
, "function %s redefined", f
->name
);
300 state
->current_function
= sig
;
301 read_instructions(&sig
->body
, body_list
, NULL
);
302 state
->current_function
= NULL
;
303 sig
->is_defined
= true;
306 state
->symbols
->pop_scope();
310 ir_reader::read_instructions(exec_list
*instructions
, s_expression
*expr
,
313 // Read in a list of instructions
314 s_list
*list
= SX_AS_LIST(expr
);
316 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
320 foreach_in_list(s_expression
, sub
, &list
->subexpressions
) {
321 ir_instruction
*ir
= read_instruction(sub
, loop_ctx
);
323 /* Global variable declarations should be moved to the top, before
324 * any functions that might use them. Functions are added to the
325 * instruction stream when scanning for prototypes, so without this
326 * hack, they always appear before variable declarations.
328 if (state
->current_function
== NULL
&& ir
->as_variable() != NULL
)
329 instructions
->push_head(ir
);
331 instructions
->push_tail(ir
);
338 ir_reader::read_instruction(s_expression
*expr
, ir_loop
*loop_ctx
)
340 s_symbol
*symbol
= SX_AS_SYMBOL(expr
);
341 if (symbol
!= NULL
) {
342 if (strcmp(symbol
->value(), "break") == 0 && loop_ctx
!= NULL
)
343 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_break
);
344 if (strcmp(symbol
->value(), "continue") == 0 && loop_ctx
!= NULL
)
345 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_continue
);
348 s_list
*list
= SX_AS_LIST(expr
);
349 if (list
== NULL
|| list
->subexpressions
.is_empty()) {
350 ir_read_error(expr
, "Invalid instruction.\n");
354 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
356 ir_read_error(expr
, "expected instruction tag");
360 ir_instruction
*inst
= NULL
;
361 if (strcmp(tag
->value(), "declare") == 0) {
362 inst
= read_declaration(list
);
363 } else if (strcmp(tag
->value(), "assign") == 0) {
364 inst
= read_assignment(list
);
365 } else if (strcmp(tag
->value(), "if") == 0) {
366 inst
= read_if(list
, loop_ctx
);
367 } else if (strcmp(tag
->value(), "loop") == 0) {
368 inst
= read_loop(list
);
369 } else if (strcmp(tag
->value(), "call") == 0) {
370 inst
= read_call(list
);
371 } else if (strcmp(tag
->value(), "return") == 0) {
372 inst
= read_return(list
);
373 } else if (strcmp(tag
->value(), "function") == 0) {
374 inst
= read_function(list
, false);
375 } else if (strcmp(tag
->value(), "emit-vertex") == 0) {
376 inst
= read_emit_vertex(list
);
377 } else if (strcmp(tag
->value(), "end-primitive") == 0) {
378 inst
= read_end_primitive(list
);
379 } else if (strcmp(tag
->value(), "barrier") == 0) {
380 inst
= read_barrier(list
);
382 inst
= read_rvalue(list
);
384 ir_read_error(NULL
, "when reading instruction");
390 ir_reader::read_declaration(s_expression
*expr
)
393 s_expression
*s_type
;
396 s_pattern pat
[] = { "declare", s_quals
, s_type
, s_name
};
397 if (!MATCH(expr
, pat
)) {
398 ir_read_error(expr
, "expected (declare (<qualifiers>) <type> <name>)");
402 const glsl_type
*type
= read_type(s_type
);
406 ir_variable
*var
= new(mem_ctx
) ir_variable(type
, s_name
->value(),
409 foreach_in_list(s_symbol
, qualifier
, &s_quals
->subexpressions
) {
410 if (!qualifier
->is_symbol()) {
411 ir_read_error(expr
, "qualifier list must contain only symbols");
415 // FINISHME: Check for duplicate/conflicting qualifiers.
416 if (strcmp(qualifier
->value(), "centroid") == 0) {
417 var
->data
.centroid
= 1;
418 } else if (strcmp(qualifier
->value(), "sample") == 0) {
419 var
->data
.sample
= 1;
420 } else if (strcmp(qualifier
->value(), "patch") == 0) {
422 } else if (strcmp(qualifier
->value(), "explicit_invariant") == 0) {
423 var
->data
.explicit_invariant
= true;
424 } else if (strcmp(qualifier
->value(), "invariant") == 0) {
425 var
->data
.invariant
= true;
426 } else if (strcmp(qualifier
->value(), "uniform") == 0) {
427 var
->data
.mode
= ir_var_uniform
;
428 } else if (strcmp(qualifier
->value(), "shader_storage") == 0) {
429 var
->data
.mode
= ir_var_shader_storage
;
430 } else if (strcmp(qualifier
->value(), "auto") == 0) {
431 var
->data
.mode
= ir_var_auto
;
432 } else if (strcmp(qualifier
->value(), "in") == 0) {
433 var
->data
.mode
= ir_var_function_in
;
434 } else if (strcmp(qualifier
->value(), "shader_in") == 0) {
435 var
->data
.mode
= ir_var_shader_in
;
436 } else if (strcmp(qualifier
->value(), "const_in") == 0) {
437 var
->data
.mode
= ir_var_const_in
;
438 } else if (strcmp(qualifier
->value(), "out") == 0) {
439 var
->data
.mode
= ir_var_function_out
;
440 } else if (strcmp(qualifier
->value(), "shader_out") == 0) {
441 var
->data
.mode
= ir_var_shader_out
;
442 } else if (strcmp(qualifier
->value(), "inout") == 0) {
443 var
->data
.mode
= ir_var_function_inout
;
444 } else if (strcmp(qualifier
->value(), "temporary") == 0) {
445 var
->data
.mode
= ir_var_temporary
;
446 } else if (strcmp(qualifier
->value(), "stream1") == 0) {
447 var
->data
.stream
= 1;
448 } else if (strcmp(qualifier
->value(), "stream2") == 0) {
449 var
->data
.stream
= 2;
450 } else if (strcmp(qualifier
->value(), "stream3") == 0) {
451 var
->data
.stream
= 3;
452 } else if (strcmp(qualifier
->value(), "smooth") == 0) {
453 var
->data
.interpolation
= INTERP_MODE_SMOOTH
;
454 } else if (strcmp(qualifier
->value(), "flat") == 0) {
455 var
->data
.interpolation
= INTERP_MODE_FLAT
;
456 } else if (strcmp(qualifier
->value(), "noperspective") == 0) {
457 var
->data
.interpolation
= INTERP_MODE_NOPERSPECTIVE
;
459 ir_read_error(expr
, "unknown qualifier: %s", qualifier
->value());
464 // Add the variable to the symbol table
465 state
->symbols
->add_variable(var
);
472 ir_reader::read_if(s_expression
*expr
, ir_loop
*loop_ctx
)
474 s_expression
*s_cond
;
475 s_expression
*s_then
;
476 s_expression
*s_else
;
478 s_pattern pat
[] = { "if", s_cond
, s_then
, s_else
};
479 if (!MATCH(expr
, pat
)) {
480 ir_read_error(expr
, "expected (if <condition> (<then>...) (<else>...))");
484 ir_rvalue
*condition
= read_rvalue(s_cond
);
485 if (condition
== NULL
) {
486 ir_read_error(NULL
, "when reading condition of (if ...)");
490 ir_if
*iff
= new(mem_ctx
) ir_if(condition
);
492 read_instructions(&iff
->then_instructions
, s_then
, loop_ctx
);
493 read_instructions(&iff
->else_instructions
, s_else
, loop_ctx
);
503 ir_reader::read_loop(s_expression
*expr
)
505 s_expression
*s_body
;
507 s_pattern loop_pat
[] = { "loop", s_body
};
508 if (!MATCH(expr
, loop_pat
)) {
509 ir_read_error(expr
, "expected (loop <body>)");
513 ir_loop
*loop
= new(mem_ctx
) ir_loop
;
515 read_instructions(&loop
->body_instructions
, s_body
, loop
);
525 ir_reader::read_return(s_expression
*expr
)
527 s_expression
*s_retval
;
529 s_pattern return_value_pat
[] = { "return", s_retval
};
530 s_pattern return_void_pat
[] = { "return" };
531 if (MATCH(expr
, return_value_pat
)) {
532 ir_rvalue
*retval
= read_rvalue(s_retval
);
533 if (retval
== NULL
) {
534 ir_read_error(NULL
, "when reading return value");
537 return new(mem_ctx
) ir_return(retval
);
538 } else if (MATCH(expr
, return_void_pat
)) {
539 return new(mem_ctx
) ir_return
;
541 ir_read_error(expr
, "expected (return <rvalue>) or (return)");
548 ir_reader::read_rvalue(s_expression
*expr
)
550 s_list
*list
= SX_AS_LIST(expr
);
551 if (list
== NULL
|| list
->subexpressions
.is_empty())
554 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
556 ir_read_error(expr
, "expected rvalue tag");
560 ir_rvalue
*rvalue
= read_dereference(list
);
561 if (rvalue
!= NULL
|| state
->error
)
563 else if (strcmp(tag
->value(), "swiz") == 0) {
564 rvalue
= read_swizzle(list
);
565 } else if (strcmp(tag
->value(), "expression") == 0) {
566 rvalue
= read_expression(list
);
567 } else if (strcmp(tag
->value(), "constant") == 0) {
568 rvalue
= read_constant(list
);
570 rvalue
= read_texture(list
);
571 if (rvalue
== NULL
&& !state
->error
)
572 ir_read_error(expr
, "unrecognized rvalue tag: %s", tag
->value());
579 ir_reader::read_assignment(s_expression
*expr
)
581 s_expression
*cond_expr
= NULL
;
582 s_expression
*lhs_expr
, *rhs_expr
;
585 s_pattern pat4
[] = { "assign", mask_list
, lhs_expr
, rhs_expr
};
586 s_pattern pat5
[] = { "assign", cond_expr
, mask_list
, lhs_expr
, rhs_expr
};
587 if (!MATCH(expr
, pat4
) && !MATCH(expr
, pat5
)) {
588 ir_read_error(expr
, "expected (assign [<condition>] (<write mask>) "
593 ir_rvalue
*condition
= NULL
;
594 if (cond_expr
!= NULL
) {
595 condition
= read_rvalue(cond_expr
);
596 if (condition
== NULL
) {
597 ir_read_error(NULL
, "when reading condition of assignment");
604 s_symbol
*mask_symbol
;
605 s_pattern mask_pat
[] = { mask_symbol
};
606 if (MATCH(mask_list
, mask_pat
)) {
607 const char *mask_str
= mask_symbol
->value();
608 unsigned mask_length
= strlen(mask_str
);
609 if (mask_length
> 4) {
610 ir_read_error(expr
, "invalid write mask: %s", mask_str
);
614 const unsigned idx_map
[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
616 for (unsigned i
= 0; i
< mask_length
; i
++) {
617 if (mask_str
[i
] < 'w' || mask_str
[i
] > 'z') {
618 ir_read_error(expr
, "write mask contains invalid character: %c",
622 mask
|= 1 << idx_map
[mask_str
[i
] - 'w'];
624 } else if (!mask_list
->subexpressions
.is_empty()) {
625 ir_read_error(mask_list
, "expected () or (<write mask>)");
629 ir_dereference
*lhs
= read_dereference(lhs_expr
);
631 ir_read_error(NULL
, "when reading left-hand side of assignment");
635 ir_rvalue
*rhs
= read_rvalue(rhs_expr
);
637 ir_read_error(NULL
, "when reading right-hand side of assignment");
641 if (mask
== 0 && (lhs
->type
->is_vector() || lhs
->type
->is_scalar())) {
642 ir_read_error(expr
, "non-zero write mask required.");
646 return new(mem_ctx
) ir_assignment(lhs
, rhs
, condition
, mask
);
650 ir_reader::read_call(s_expression
*expr
)
654 s_list
*s_return
= NULL
;
656 ir_dereference_variable
*return_deref
= NULL
;
658 s_pattern void_pat
[] = { "call", name
, params
};
659 s_pattern non_void_pat
[] = { "call", name
, s_return
, params
};
660 if (MATCH(expr
, non_void_pat
)) {
661 return_deref
= read_var_ref(s_return
);
662 if (return_deref
== NULL
) {
663 ir_read_error(s_return
, "when reading a call's return storage");
666 } else if (!MATCH(expr
, void_pat
)) {
667 ir_read_error(expr
, "expected (call <name> [<deref>] (<param> ...))");
671 exec_list parameters
;
673 foreach_in_list(s_expression
, e
, ¶ms
->subexpressions
) {
674 ir_rvalue
*param
= read_rvalue(e
);
676 ir_read_error(e
, "when reading parameter to function call");
679 parameters
.push_tail(param
);
682 ir_function
*f
= state
->symbols
->get_function(name
->value());
684 ir_read_error(expr
, "found call to undefined function %s",
689 ir_function_signature
*callee
=
690 f
->matching_signature(state
, ¶meters
, true);
691 if (callee
== NULL
) {
692 ir_read_error(expr
, "couldn't find matching signature for function "
693 "%s", name
->value());
697 if (callee
->return_type
== glsl_type::void_type
&& return_deref
) {
698 ir_read_error(expr
, "call has return value storage but void type");
700 } else if (callee
->return_type
!= glsl_type::void_type
&& !return_deref
) {
701 ir_read_error(expr
, "call has non-void type but no return value storage");
705 return new(mem_ctx
) ir_call(callee
, return_deref
, ¶meters
);
709 ir_reader::read_expression(s_expression
*expr
)
711 s_expression
*s_type
;
713 s_expression
*s_arg
[4] = {NULL
};
715 s_pattern pat
[] = { "expression", s_type
, s_op
, s_arg
[0] };
716 if (!PARTIAL_MATCH(expr
, pat
)) {
717 ir_read_error(expr
, "expected (expression <type> <operator> "
718 "<operand> [<operand>] [<operand>] [<operand>])");
721 s_arg
[1] = (s_expression
*) s_arg
[0]->next
; // may be tail sentinel
722 s_arg
[2] = (s_expression
*) s_arg
[1]->next
; // may be tail sentinel or NULL
724 s_arg
[3] = (s_expression
*) s_arg
[2]->next
; // may be tail sentinel or NULL
726 const glsl_type
*type
= read_type(s_type
);
730 /* Read the operator */
731 ir_expression_operation op
= ir_expression::get_operator(s_op
->value());
732 if (op
== (ir_expression_operation
) -1) {
733 ir_read_error(expr
, "invalid operator: %s", s_op
->value());
737 /* Skip "expression" <type> <operation> by subtracting 3. */
738 int num_operands
= (int) ((s_list
*) expr
)->subexpressions
.length() - 3;
740 int expected_operands
= ir_expression::get_num_operands(op
);
741 if (num_operands
!= expected_operands
) {
742 ir_read_error(expr
, "found %d expression operands, expected %d",
743 num_operands
, expected_operands
);
747 ir_rvalue
*arg
[4] = {NULL
};
748 for (int i
= 0; i
< num_operands
; i
++) {
749 arg
[i
] = read_rvalue(s_arg
[i
]);
750 if (arg
[i
] == NULL
) {
751 ir_read_error(NULL
, "when reading operand #%d of %s", i
, s_op
->value());
756 return new(mem_ctx
) ir_expression(op
, type
, arg
[0], arg
[1], arg
[2], arg
[3]);
760 ir_reader::read_swizzle(s_expression
*expr
)
765 s_pattern pat
[] = { "swiz", swiz
, sub
};
766 if (!MATCH(expr
, pat
)) {
767 ir_read_error(expr
, "expected (swiz <swizzle> <rvalue>)");
771 if (strlen(swiz
->value()) > 4) {
772 ir_read_error(expr
, "expected a valid swizzle; found %s", swiz
->value());
776 ir_rvalue
*rvalue
= read_rvalue(sub
);
780 ir_swizzle
*ir
= ir_swizzle::create(rvalue
, swiz
->value(),
781 rvalue
->type
->vector_elements
);
783 ir_read_error(expr
, "invalid swizzle");
789 ir_reader::read_constant(s_expression
*expr
)
791 s_expression
*type_expr
;
794 s_pattern pat
[] = { "constant", type_expr
, values
};
795 if (!MATCH(expr
, pat
)) {
796 ir_read_error(expr
, "expected (constant <type> (...))");
800 const glsl_type
*type
= read_type(type_expr
);
804 if (values
== NULL
) {
805 ir_read_error(expr
, "expected (constant <type> (...))");
809 if (type
->is_array()) {
810 unsigned elements_supplied
= 0;
812 foreach_in_list(s_expression
, elt
, &values
->subexpressions
) {
813 ir_constant
*ir_elt
= read_constant(elt
);
816 elements
.push_tail(ir_elt
);
820 if (elements_supplied
!= type
->length
) {
821 ir_read_error(values
, "expected exactly %u array elements, "
822 "given %u", type
->length
, elements_supplied
);
825 return new(mem_ctx
) ir_constant(type
, &elements
);
828 ir_constant_data data
= { { 0 } };
830 // Read in list of values (at most 16).
832 foreach_in_list(s_expression
, expr
, &values
->subexpressions
) {
834 ir_read_error(values
, "expected at most 16 numbers");
838 if (type
->is_float()) {
839 s_number
*value
= SX_AS_NUMBER(expr
);
841 ir_read_error(values
, "expected numbers");
844 data
.f
[k
] = value
->fvalue();
846 s_int
*value
= SX_AS_INT(expr
);
848 ir_read_error(values
, "expected integers");
852 switch (type
->base_type
) {
853 case GLSL_TYPE_UINT
: {
854 data
.u
[k
] = value
->value();
857 case GLSL_TYPE_INT
: {
858 data
.i
[k
] = value
->value();
861 case GLSL_TYPE_BOOL
: {
862 data
.b
[k
] = value
->value();
866 ir_read_error(values
, "unsupported constant type");
872 if (k
!= type
->components()) {
873 ir_read_error(values
, "expected %u constant values, found %u",
874 type
->components(), k
);
878 return new(mem_ctx
) ir_constant(type
, &data
);
881 ir_dereference_variable
*
882 ir_reader::read_var_ref(s_expression
*expr
)
885 s_pattern var_pat
[] = { "var_ref", s_var
};
887 if (MATCH(expr
, var_pat
)) {
888 ir_variable
*var
= state
->symbols
->get_variable(s_var
->value());
890 ir_read_error(expr
, "undeclared variable: %s", s_var
->value());
893 return new(mem_ctx
) ir_dereference_variable(var
);
899 ir_reader::read_dereference(s_expression
*expr
)
901 s_expression
*s_subject
;
902 s_expression
*s_index
;
905 s_pattern array_pat
[] = { "array_ref", s_subject
, s_index
};
906 s_pattern record_pat
[] = { "record_ref", s_subject
, s_field
};
908 ir_dereference_variable
*var_ref
= read_var_ref(expr
);
909 if (var_ref
!= NULL
) {
911 } else if (MATCH(expr
, array_pat
)) {
912 ir_rvalue
*subject
= read_rvalue(s_subject
);
913 if (subject
== NULL
) {
914 ir_read_error(NULL
, "when reading the subject of an array_ref");
918 ir_rvalue
*idx
= read_rvalue(s_index
);
920 ir_read_error(NULL
, "when reading the index of an array_ref");
923 return new(mem_ctx
) ir_dereference_array(subject
, idx
);
924 } else if (MATCH(expr
, record_pat
)) {
925 ir_rvalue
*subject
= read_rvalue(s_subject
);
926 if (subject
== NULL
) {
927 ir_read_error(NULL
, "when reading the subject of a record_ref");
930 return new(mem_ctx
) ir_dereference_record(subject
, s_field
->value());
936 ir_reader::read_texture(s_expression
*expr
)
938 s_symbol
*tag
= NULL
;
939 s_expression
*s_type
= NULL
;
940 s_expression
*s_sampler
= NULL
;
941 s_expression
*s_coord
= NULL
;
942 s_expression
*s_offset
= NULL
;
943 s_expression
*s_proj
= NULL
;
944 s_list
*s_shadow
= NULL
;
945 s_expression
*s_lod
= NULL
;
946 s_expression
*s_sample_index
= NULL
;
947 s_expression
*s_component
= NULL
;
949 ir_texture_opcode op
= ir_tex
; /* silence warning */
951 s_pattern tex_pattern
[] =
952 { "tex", s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
};
953 s_pattern lod_pattern
[] =
954 { "lod", s_type
, s_sampler
, s_coord
};
955 s_pattern txf_pattern
[] =
956 { "txf", s_type
, s_sampler
, s_coord
, s_offset
, s_lod
};
957 s_pattern txf_ms_pattern
[] =
958 { "txf_ms", s_type
, s_sampler
, s_coord
, s_sample_index
};
959 s_pattern txs_pattern
[] =
960 { "txs", s_type
, s_sampler
, s_lod
};
961 s_pattern tg4_pattern
[] =
962 { "tg4", s_type
, s_sampler
, s_coord
, s_offset
, s_component
};
963 s_pattern query_levels_pattern
[] =
964 { "query_levels", s_type
, s_sampler
};
965 s_pattern texture_samples_pattern
[] =
966 { "samples", s_type
, s_sampler
};
967 s_pattern other_pattern
[] =
968 { tag
, s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
, s_lod
};
970 if (MATCH(expr
, lod_pattern
)) {
972 } else if (MATCH(expr
, tex_pattern
)) {
974 } else if (MATCH(expr
, txf_pattern
)) {
976 } else if (MATCH(expr
, txf_ms_pattern
)) {
978 } else if (MATCH(expr
, txs_pattern
)) {
980 } else if (MATCH(expr
, tg4_pattern
)) {
982 } else if (MATCH(expr
, query_levels_pattern
)) {
983 op
= ir_query_levels
;
984 } else if (MATCH(expr
, texture_samples_pattern
)) {
985 op
= ir_texture_samples
;
986 } else if (MATCH(expr
, other_pattern
)) {
987 op
= ir_texture::get_opcode(tag
->value());
988 if (op
== (ir_texture_opcode
) -1)
991 ir_read_error(NULL
, "unexpected texture pattern %s", tag
->value());
995 ir_texture
*tex
= new(mem_ctx
) ir_texture(op
);
998 const glsl_type
*type
= read_type(s_type
);
1000 ir_read_error(NULL
, "when reading type in (%s ...)",
1001 tex
->opcode_string());
1005 // Read sampler (must be a deref)
1006 ir_dereference
*sampler
= read_dereference(s_sampler
);
1007 if (sampler
== NULL
) {
1008 ir_read_error(NULL
, "when reading sampler in (%s ...)",
1009 tex
->opcode_string());
1012 tex
->set_sampler(sampler
, type
);
1015 // Read coordinate (any rvalue)
1016 tex
->coordinate
= read_rvalue(s_coord
);
1017 if (tex
->coordinate
== NULL
) {
1018 ir_read_error(NULL
, "when reading coordinate in (%s ...)",
1019 tex
->opcode_string());
1023 if (op
!= ir_txf_ms
&& op
!= ir_lod
) {
1024 // Read texel offset - either 0 or an rvalue.
1025 s_int
*si_offset
= SX_AS_INT(s_offset
);
1026 if (si_offset
== NULL
|| si_offset
->value() != 0) {
1027 tex
->offset
= read_rvalue(s_offset
);
1028 if (tex
->offset
== NULL
) {
1029 ir_read_error(s_offset
, "expected 0 or an expression");
1036 if (op
!= ir_txf
&& op
!= ir_txf_ms
&&
1037 op
!= ir_txs
&& op
!= ir_lod
&& op
!= ir_tg4
&&
1038 op
!= ir_query_levels
&& op
!= ir_texture_samples
) {
1039 s_int
*proj_as_int
= SX_AS_INT(s_proj
);
1040 if (proj_as_int
&& proj_as_int
->value() == 1) {
1041 tex
->projector
= NULL
;
1043 tex
->projector
= read_rvalue(s_proj
);
1044 if (tex
->projector
== NULL
) {
1045 ir_read_error(NULL
, "when reading projective divide in (%s ..)",
1046 tex
->opcode_string());
1051 if (s_shadow
->subexpressions
.is_empty()) {
1052 tex
->shadow_comparator
= NULL
;
1054 tex
->shadow_comparator
= read_rvalue(s_shadow
);
1055 if (tex
->shadow_comparator
== NULL
) {
1056 ir_read_error(NULL
, "when reading shadow comparator in (%s ..)",
1057 tex
->opcode_string());
1065 tex
->lod_info
.bias
= read_rvalue(s_lod
);
1066 if (tex
->lod_info
.bias
== NULL
) {
1067 ir_read_error(NULL
, "when reading LOD bias in (txb ...)");
1074 tex
->lod_info
.lod
= read_rvalue(s_lod
);
1075 if (tex
->lod_info
.lod
== NULL
) {
1076 ir_read_error(NULL
, "when reading LOD in (%s ...)",
1077 tex
->opcode_string());
1082 tex
->lod_info
.sample_index
= read_rvalue(s_sample_index
);
1083 if (tex
->lod_info
.sample_index
== NULL
) {
1084 ir_read_error(NULL
, "when reading sample_index in (txf_ms ...)");
1089 s_expression
*s_dx
, *s_dy
;
1090 s_pattern dxdy_pat
[] = { s_dx
, s_dy
};
1091 if (!MATCH(s_lod
, dxdy_pat
)) {
1092 ir_read_error(s_lod
, "expected (dPdx dPdy) in (txd ...)");
1095 tex
->lod_info
.grad
.dPdx
= read_rvalue(s_dx
);
1096 if (tex
->lod_info
.grad
.dPdx
== NULL
) {
1097 ir_read_error(NULL
, "when reading dPdx in (txd ...)");
1100 tex
->lod_info
.grad
.dPdy
= read_rvalue(s_dy
);
1101 if (tex
->lod_info
.grad
.dPdy
== NULL
) {
1102 ir_read_error(NULL
, "when reading dPdy in (txd ...)");
1108 tex
->lod_info
.component
= read_rvalue(s_component
);
1109 if (tex
->lod_info
.component
== NULL
) {
1110 ir_read_error(NULL
, "when reading component in (tg4 ...)");
1115 // tex and lod don't have any extra parameters.
1122 ir_reader::read_emit_vertex(s_expression
*expr
)
1124 s_expression
*s_stream
= NULL
;
1126 s_pattern pat
[] = { "emit-vertex", s_stream
};
1128 if (MATCH(expr
, pat
)) {
1129 ir_rvalue
*stream
= read_dereference(s_stream
);
1130 if (stream
== NULL
) {
1131 ir_read_error(NULL
, "when reading stream info in emit-vertex");
1134 return new(mem_ctx
) ir_emit_vertex(stream
);
1136 ir_read_error(NULL
, "when reading emit-vertex");
1141 ir_reader::read_end_primitive(s_expression
*expr
)
1143 s_expression
*s_stream
= NULL
;
1145 s_pattern pat
[] = { "end-primitive", s_stream
};
1147 if (MATCH(expr
, pat
)) {
1148 ir_rvalue
*stream
= read_dereference(s_stream
);
1149 if (stream
== NULL
) {
1150 ir_read_error(NULL
, "when reading stream info in end-primitive");
1153 return new(mem_ctx
) ir_end_primitive(stream
);
1155 ir_read_error(NULL
, "when reading end-primitive");
1160 ir_reader::read_barrier(s_expression
*expr
)
1162 s_pattern pat
[] = { "barrier" };
1164 if (MATCH(expr
, pat
)) {
1165 return new(mem_ctx
) ir_barrier();
1167 ir_read_error(NULL
, "when reading barrier");