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
*);
62 ir_emit_vertex
*read_emit_vertex(s_expression
*);
63 ir_end_primitive
*read_end_primitive(s_expression
*);
65 ir_dereference
*read_dereference(s_expression
*);
66 ir_dereference_variable
*read_var_ref(s_expression
*);
69 ir_reader::ir_reader(_mesa_glsl_parse_state
*state
) : state(state
)
71 this->mem_ctx
= state
;
75 _mesa_glsl_read_ir(_mesa_glsl_parse_state
*state
, exec_list
*instructions
,
76 const char *src
, bool scan_for_protos
)
79 r
.read(instructions
, src
, scan_for_protos
);
83 ir_reader::read(exec_list
*instructions
, const char *src
, bool scan_for_protos
)
85 void *sx_mem_ctx
= ralloc_context(NULL
);
86 s_expression
*expr
= s_expression::read_expression(sx_mem_ctx
, src
);
88 ir_read_error(NULL
, "couldn't parse S-Expression.");
92 if (scan_for_protos
) {
93 scan_for_prototypes(instructions
, expr
);
98 read_instructions(instructions
, expr
, NULL
);
99 ralloc_free(sx_mem_ctx
);
102 validate_ir_tree(instructions
);
106 ir_reader::ir_read_error(s_expression
*expr
, const char *fmt
, ...)
112 if (state
->current_function
!= NULL
)
113 ralloc_asprintf_append(&state
->info_log
, "In function %s:\n",
114 state
->current_function
->function_name());
115 ralloc_strcat(&state
->info_log
, "error: ");
118 ralloc_vasprintf_append(&state
->info_log
, fmt
, ap
);
120 ralloc_strcat(&state
->info_log
, "\n");
123 ralloc_strcat(&state
->info_log
, "...in this context:\n ");
125 ralloc_strcat(&state
->info_log
, "\n\n");
130 ir_reader::read_type(s_expression
*expr
)
132 s_expression
*s_base_type
;
135 s_pattern pat
[] = { "array", s_base_type
, s_size
};
136 if (MATCH(expr
, pat
)) {
137 const glsl_type
*base_type
= read_type(s_base_type
);
138 if (base_type
== NULL
) {
139 ir_read_error(NULL
, "when reading base type of array type");
143 return glsl_type::get_array_instance(base_type
, s_size
->value());
146 s_symbol
*type_sym
= SX_AS_SYMBOL(expr
);
147 if (type_sym
== NULL
) {
148 ir_read_error(expr
, "expected <type>");
152 const glsl_type
*type
= state
->symbols
->get_type(type_sym
->value());
154 ir_read_error(expr
, "invalid type: %s", type_sym
->value());
161 ir_reader::scan_for_prototypes(exec_list
*instructions
, s_expression
*expr
)
163 s_list
*list
= SX_AS_LIST(expr
);
165 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
169 foreach_iter(exec_list_iterator
, it
, list
->subexpressions
) {
170 s_list
*sub
= SX_AS_LIST(it
.get());
172 continue; // not a (function ...); ignore it.
174 s_symbol
*tag
= SX_AS_SYMBOL(sub
->subexpressions
.get_head());
175 if (tag
== NULL
|| strcmp(tag
->value(), "function") != 0)
176 continue; // not a (function ...); ignore it.
178 ir_function
*f
= read_function(sub
, true);
181 instructions
->push_tail(f
);
186 ir_reader::read_function(s_expression
*expr
, bool skip_body
)
191 s_pattern pat
[] = { "function", name
};
192 if (!PARTIAL_MATCH(expr
, pat
)) {
193 ir_read_error(expr
, "Expected (function <name> (signature ...) ...)");
197 ir_function
*f
= state
->symbols
->get_function(name
->value());
199 f
= new(mem_ctx
) ir_function(name
->value());
200 added
= state
->symbols
->add_function(f
);
204 exec_list_iterator it
= ((s_list
*) expr
)->subexpressions
.iterator();
205 it
.next(); // skip "function" tag
206 it
.next(); // skip function name
207 for (/* nothing */; it
.has_next(); it
.next()) {
208 s_expression
*s_sig
= (s_expression
*) it
.get();
209 read_function_sig(f
, s_sig
, skip_body
);
211 return added
? f
: NULL
;
215 ir_reader::read_function_sig(ir_function
*f
, s_expression
*expr
, bool skip_body
)
217 s_expression
*type_expr
;
221 s_pattern pat
[] = { "signature", type_expr
, paramlist
, body_list
};
222 if (!MATCH(expr
, pat
)) {
223 ir_read_error(expr
, "Expected (signature <type> (parameters ...) "
224 "(<instruction> ...))");
228 const glsl_type
*return_type
= read_type(type_expr
);
229 if (return_type
== NULL
)
232 s_symbol
*paramtag
= SX_AS_SYMBOL(paramlist
->subexpressions
.get_head());
233 if (paramtag
== NULL
|| strcmp(paramtag
->value(), "parameters") != 0) {
234 ir_read_error(paramlist
, "Expected (parameters ...)");
238 // Read the parameters list into a temporary place.
239 exec_list hir_parameters
;
240 state
->symbols
->push_scope();
242 exec_list_iterator it
= paramlist
->subexpressions
.iterator();
243 for (it
.next() /* skip "parameters" */; it
.has_next(); it
.next()) {
244 ir_variable
*var
= read_declaration((s_expression
*) it
.get());
248 hir_parameters
.push_tail(var
);
251 ir_function_signature
*sig
= f
->exact_matching_signature(&hir_parameters
);
252 if (sig
== NULL
&& skip_body
) {
253 /* If scanning for prototypes, generate a new signature. */
254 sig
= new(mem_ctx
) ir_function_signature(return_type
);
255 sig
->is_builtin
= true;
256 f
->add_signature(sig
);
257 } else if (sig
!= NULL
) {
258 const char *badvar
= sig
->qualifiers_match(&hir_parameters
);
259 if (badvar
!= NULL
) {
260 ir_read_error(expr
, "function `%s' parameter `%s' qualifiers "
261 "don't match prototype", f
->name
, badvar
);
265 if (sig
->return_type
!= return_type
) {
266 ir_read_error(expr
, "function `%s' return type doesn't "
267 "match prototype", f
->name
);
271 /* No prototype for this body exists - skip it. */
272 state
->symbols
->pop_scope();
277 sig
->replace_parameters(&hir_parameters
);
279 if (!skip_body
&& !body_list
->subexpressions
.is_empty()) {
280 if (sig
->is_defined
) {
281 ir_read_error(expr
, "function %s redefined", f
->name
);
284 state
->current_function
= sig
;
285 read_instructions(&sig
->body
, body_list
, NULL
);
286 state
->current_function
= NULL
;
287 sig
->is_defined
= true;
290 state
->symbols
->pop_scope();
294 ir_reader::read_instructions(exec_list
*instructions
, s_expression
*expr
,
297 // Read in a list of instructions
298 s_list
*list
= SX_AS_LIST(expr
);
300 ir_read_error(expr
, "Expected (<instruction> ...); found an atom.");
304 foreach_iter(exec_list_iterator
, it
, list
->subexpressions
) {
305 s_expression
*sub
= (s_expression
*) it
.get();
306 ir_instruction
*ir
= read_instruction(sub
, loop_ctx
);
308 /* Global variable declarations should be moved to the top, before
309 * any functions that might use them. Functions are added to the
310 * instruction stream when scanning for prototypes, so without this
311 * hack, they always appear before variable declarations.
313 if (state
->current_function
== NULL
&& ir
->as_variable() != NULL
)
314 instructions
->push_head(ir
);
316 instructions
->push_tail(ir
);
323 ir_reader::read_instruction(s_expression
*expr
, ir_loop
*loop_ctx
)
325 s_symbol
*symbol
= SX_AS_SYMBOL(expr
);
326 if (symbol
!= NULL
) {
327 if (strcmp(symbol
->value(), "break") == 0 && loop_ctx
!= NULL
)
328 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_break
);
329 if (strcmp(symbol
->value(), "continue") == 0 && loop_ctx
!= NULL
)
330 return new(mem_ctx
) ir_loop_jump(ir_loop_jump::jump_continue
);
333 s_list
*list
= SX_AS_LIST(expr
);
334 if (list
== NULL
|| list
->subexpressions
.is_empty()) {
335 ir_read_error(expr
, "Invalid instruction.\n");
339 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
341 ir_read_error(expr
, "expected instruction tag");
345 ir_instruction
*inst
= NULL
;
346 if (strcmp(tag
->value(), "declare") == 0) {
347 inst
= read_declaration(list
);
348 } else if (strcmp(tag
->value(), "assign") == 0) {
349 inst
= read_assignment(list
);
350 } else if (strcmp(tag
->value(), "if") == 0) {
351 inst
= read_if(list
, loop_ctx
);
352 } else if (strcmp(tag
->value(), "loop") == 0) {
353 inst
= read_loop(list
);
354 } else if (strcmp(tag
->value(), "call") == 0) {
355 inst
= read_call(list
);
356 } else if (strcmp(tag
->value(), "return") == 0) {
357 inst
= read_return(list
);
358 } else if (strcmp(tag
->value(), "function") == 0) {
359 inst
= read_function(list
, false);
360 } else if (strcmp(tag
->value(), "emit-vertex") == 0) {
361 inst
= read_emit_vertex(list
);
362 } else if (strcmp(tag
->value(), "end-primitive") == 0) {
363 inst
= read_end_primitive(list
);
365 inst
= read_rvalue(list
);
367 ir_read_error(NULL
, "when reading instruction");
373 ir_reader::read_declaration(s_expression
*expr
)
376 s_expression
*s_type
;
379 s_pattern pat
[] = { "declare", s_quals
, s_type
, s_name
};
380 if (!MATCH(expr
, pat
)) {
381 ir_read_error(expr
, "expected (declare (<qualifiers>) <type> <name>)");
385 const glsl_type
*type
= read_type(s_type
);
389 ir_variable
*var
= new(mem_ctx
) ir_variable(type
, s_name
->value(),
392 foreach_iter(exec_list_iterator
, it
, s_quals
->subexpressions
) {
393 s_symbol
*qualifier
= SX_AS_SYMBOL(it
.get());
394 if (qualifier
== NULL
) {
395 ir_read_error(expr
, "qualifier list must contain only symbols");
399 // FINISHME: Check for duplicate/conflicting qualifiers.
400 if (strcmp(qualifier
->value(), "centroid") == 0) {
402 } else if (strcmp(qualifier
->value(), "invariant") == 0) {
404 } else if (strcmp(qualifier
->value(), "uniform") == 0) {
405 var
->mode
= ir_var_uniform
;
406 } else if (strcmp(qualifier
->value(), "auto") == 0) {
407 var
->mode
= ir_var_auto
;
408 } else if (strcmp(qualifier
->value(), "in") == 0) {
409 var
->mode
= ir_var_function_in
;
410 } else if (strcmp(qualifier
->value(), "shader_in") == 0) {
411 var
->mode
= ir_var_shader_in
;
412 } else if (strcmp(qualifier
->value(), "const_in") == 0) {
413 var
->mode
= ir_var_const_in
;
414 } else if (strcmp(qualifier
->value(), "out") == 0) {
415 var
->mode
= ir_var_function_out
;
416 } else if (strcmp(qualifier
->value(), "shader_out") == 0) {
417 var
->mode
= ir_var_shader_out
;
418 } else if (strcmp(qualifier
->value(), "inout") == 0) {
419 var
->mode
= ir_var_function_inout
;
420 } else if (strcmp(qualifier
->value(), "temporary") == 0) {
421 var
->mode
= ir_var_temporary
;
422 } else if (strcmp(qualifier
->value(), "smooth") == 0) {
423 var
->interpolation
= INTERP_QUALIFIER_SMOOTH
;
424 } else if (strcmp(qualifier
->value(), "flat") == 0) {
425 var
->interpolation
= INTERP_QUALIFIER_FLAT
;
426 } else if (strcmp(qualifier
->value(), "noperspective") == 0) {
427 var
->interpolation
= INTERP_QUALIFIER_NOPERSPECTIVE
;
429 ir_read_error(expr
, "unknown qualifier: %s", qualifier
->value());
434 // Add the variable to the symbol table
435 state
->symbols
->add_variable(var
);
442 ir_reader::read_if(s_expression
*expr
, ir_loop
*loop_ctx
)
444 s_expression
*s_cond
;
445 s_expression
*s_then
;
446 s_expression
*s_else
;
448 s_pattern pat
[] = { "if", s_cond
, s_then
, s_else
};
449 if (!MATCH(expr
, pat
)) {
450 ir_read_error(expr
, "expected (if <condition> (<then>...) (<else>...))");
454 ir_rvalue
*condition
= read_rvalue(s_cond
);
455 if (condition
== NULL
) {
456 ir_read_error(NULL
, "when reading condition of (if ...)");
460 ir_if
*iff
= new(mem_ctx
) ir_if(condition
);
462 read_instructions(&iff
->then_instructions
, s_then
, loop_ctx
);
463 read_instructions(&iff
->else_instructions
, s_else
, loop_ctx
);
473 ir_reader::read_loop(s_expression
*expr
)
475 s_expression
*s_counter
, *s_from
, *s_to
, *s_inc
, *s_body
;
477 s_pattern pat
[] = { "loop", s_counter
, s_from
, s_to
, s_inc
, s_body
};
478 if (!MATCH(expr
, pat
)) {
479 ir_read_error(expr
, "expected (loop <counter> <from> <to> "
480 "<increment> <body>)");
484 // FINISHME: actually read the count/from/to fields.
486 ir_loop
*loop
= new(mem_ctx
) ir_loop
;
487 read_instructions(&loop
->body_instructions
, s_body
, loop
);
497 ir_reader::read_return(s_expression
*expr
)
499 s_expression
*s_retval
;
501 s_pattern return_value_pat
[] = { "return", s_retval
};
502 s_pattern return_void_pat
[] = { "return" };
503 if (MATCH(expr
, return_value_pat
)) {
504 ir_rvalue
*retval
= read_rvalue(s_retval
);
505 if (retval
== NULL
) {
506 ir_read_error(NULL
, "when reading return value");
509 return new(mem_ctx
) ir_return(retval
);
510 } else if (MATCH(expr
, return_void_pat
)) {
511 return new(mem_ctx
) ir_return
;
513 ir_read_error(expr
, "expected (return <rvalue>) or (return)");
520 ir_reader::read_rvalue(s_expression
*expr
)
522 s_list
*list
= SX_AS_LIST(expr
);
523 if (list
== NULL
|| list
->subexpressions
.is_empty())
526 s_symbol
*tag
= SX_AS_SYMBOL(list
->subexpressions
.get_head());
528 ir_read_error(expr
, "expected rvalue tag");
532 ir_rvalue
*rvalue
= read_dereference(list
);
533 if (rvalue
!= NULL
|| state
->error
)
535 else if (strcmp(tag
->value(), "swiz") == 0) {
536 rvalue
= read_swizzle(list
);
537 } else if (strcmp(tag
->value(), "expression") == 0) {
538 rvalue
= read_expression(list
);
539 } else if (strcmp(tag
->value(), "constant") == 0) {
540 rvalue
= read_constant(list
);
542 rvalue
= read_texture(list
);
543 if (rvalue
== NULL
&& !state
->error
)
544 ir_read_error(expr
, "unrecognized rvalue tag: %s", tag
->value());
551 ir_reader::read_assignment(s_expression
*expr
)
553 s_expression
*cond_expr
= NULL
;
554 s_expression
*lhs_expr
, *rhs_expr
;
557 s_pattern pat4
[] = { "assign", mask_list
, lhs_expr
, rhs_expr
};
558 s_pattern pat5
[] = { "assign", cond_expr
, mask_list
, lhs_expr
, rhs_expr
};
559 if (!MATCH(expr
, pat4
) && !MATCH(expr
, pat5
)) {
560 ir_read_error(expr
, "expected (assign [<condition>] (<write mask>) "
565 ir_rvalue
*condition
= NULL
;
566 if (cond_expr
!= NULL
) {
567 condition
= read_rvalue(cond_expr
);
568 if (condition
== NULL
) {
569 ir_read_error(NULL
, "when reading condition of assignment");
576 s_symbol
*mask_symbol
;
577 s_pattern mask_pat
[] = { mask_symbol
};
578 if (MATCH(mask_list
, mask_pat
)) {
579 const char *mask_str
= mask_symbol
->value();
580 unsigned mask_length
= strlen(mask_str
);
581 if (mask_length
> 4) {
582 ir_read_error(expr
, "invalid write mask: %s", mask_str
);
586 const unsigned idx_map
[] = { 3, 0, 1, 2 }; /* w=bit 3, x=0, y=1, z=2 */
588 for (unsigned i
= 0; i
< mask_length
; i
++) {
589 if (mask_str
[i
] < 'w' || mask_str
[i
] > 'z') {
590 ir_read_error(expr
, "write mask contains invalid character: %c",
594 mask
|= 1 << idx_map
[mask_str
[i
] - 'w'];
596 } else if (!mask_list
->subexpressions
.is_empty()) {
597 ir_read_error(mask_list
, "expected () or (<write mask>)");
601 ir_dereference
*lhs
= read_dereference(lhs_expr
);
603 ir_read_error(NULL
, "when reading left-hand side of assignment");
607 ir_rvalue
*rhs
= read_rvalue(rhs_expr
);
609 ir_read_error(NULL
, "when reading right-hand side of assignment");
613 if (mask
== 0 && (lhs
->type
->is_vector() || lhs
->type
->is_scalar())) {
614 ir_read_error(expr
, "non-zero write mask required.");
618 return new(mem_ctx
) ir_assignment(lhs
, rhs
, condition
, mask
);
622 ir_reader::read_call(s_expression
*expr
)
626 s_list
*s_return
= NULL
;
628 ir_dereference_variable
*return_deref
= NULL
;
630 s_pattern void_pat
[] = { "call", name
, params
};
631 s_pattern non_void_pat
[] = { "call", name
, s_return
, params
};
632 if (MATCH(expr
, non_void_pat
)) {
633 return_deref
= read_var_ref(s_return
);
634 if (return_deref
== NULL
) {
635 ir_read_error(s_return
, "when reading a call's return storage");
638 } else if (!MATCH(expr
, void_pat
)) {
639 ir_read_error(expr
, "expected (call <name> [<deref>] (<param> ...))");
643 exec_list parameters
;
645 foreach_iter(exec_list_iterator
, it
, params
->subexpressions
) {
646 s_expression
*expr
= (s_expression
*) it
.get();
647 ir_rvalue
*param
= read_rvalue(expr
);
649 ir_read_error(expr
, "when reading parameter to function call");
652 parameters
.push_tail(param
);
655 ir_function
*f
= state
->symbols
->get_function(name
->value());
657 ir_read_error(expr
, "found call to undefined function %s",
662 ir_function_signature
*callee
= f
->matching_signature(¶meters
);
663 if (callee
== NULL
) {
664 ir_read_error(expr
, "couldn't find matching signature for function "
665 "%s", name
->value());
669 if (callee
->return_type
== glsl_type::void_type
&& return_deref
) {
670 ir_read_error(expr
, "call has return value storage but void type");
672 } else if (callee
->return_type
!= glsl_type::void_type
&& !return_deref
) {
673 ir_read_error(expr
, "call has non-void type but no return value storage");
677 return new(mem_ctx
) ir_call(callee
, return_deref
, ¶meters
);
681 ir_reader::read_expression(s_expression
*expr
)
683 s_expression
*s_type
;
685 s_expression
*s_arg
[4] = {NULL
};
687 s_pattern pat
[] = { "expression", s_type
, s_op
, s_arg
[0] };
688 if (!PARTIAL_MATCH(expr
, pat
)) {
689 ir_read_error(expr
, "expected (expression <type> <operator> "
690 "<operand> [<operand>] [<operand>] [<operand>])");
693 s_arg
[1] = (s_expression
*) s_arg
[0]->next
; // may be tail sentinel
694 s_arg
[2] = (s_expression
*) s_arg
[1]->next
; // may be tail sentinel or NULL
696 s_arg
[3] = (s_expression
*) s_arg
[2]->next
; // may be tail sentinel or NULL
698 const glsl_type
*type
= read_type(s_type
);
702 /* Read the operator */
703 ir_expression_operation op
= ir_expression::get_operator(s_op
->value());
704 if (op
== (ir_expression_operation
) -1) {
705 ir_read_error(expr
, "invalid operator: %s", s_op
->value());
709 int num_operands
= -3; /* skip "expression" <type> <operation> */
710 foreach_list(n
, &((s_list
*) expr
)->subexpressions
)
713 int expected_operands
= ir_expression::get_num_operands(op
);
714 if (num_operands
!= expected_operands
) {
715 ir_read_error(expr
, "found %d expression operands, expected %d",
716 num_operands
, expected_operands
);
720 ir_rvalue
*arg
[4] = {NULL
};
721 for (int i
= 0; i
< num_operands
; i
++) {
722 arg
[i
] = read_rvalue(s_arg
[i
]);
723 if (arg
[i
] == NULL
) {
724 ir_read_error(NULL
, "when reading operand #%d of %s", i
, s_op
->value());
729 return new(mem_ctx
) ir_expression(op
, type
, arg
[0], arg
[1], arg
[2], arg
[3]);
733 ir_reader::read_swizzle(s_expression
*expr
)
738 s_pattern pat
[] = { "swiz", swiz
, sub
};
739 if (!MATCH(expr
, pat
)) {
740 ir_read_error(expr
, "expected (swiz <swizzle> <rvalue>)");
744 if (strlen(swiz
->value()) > 4) {
745 ir_read_error(expr
, "expected a valid swizzle; found %s", swiz
->value());
749 ir_rvalue
*rvalue
= read_rvalue(sub
);
753 ir_swizzle
*ir
= ir_swizzle::create(rvalue
, swiz
->value(),
754 rvalue
->type
->vector_elements
);
756 ir_read_error(expr
, "invalid swizzle");
762 ir_reader::read_constant(s_expression
*expr
)
764 s_expression
*type_expr
;
767 s_pattern pat
[] = { "constant", type_expr
, values
};
768 if (!MATCH(expr
, pat
)) {
769 ir_read_error(expr
, "expected (constant <type> (...))");
773 const glsl_type
*type
= read_type(type_expr
);
777 if (values
== NULL
) {
778 ir_read_error(expr
, "expected (constant <type> (...))");
782 if (type
->is_array()) {
783 unsigned elements_supplied
= 0;
785 foreach_iter(exec_list_iterator
, it
, values
->subexpressions
) {
786 s_expression
*elt
= (s_expression
*) it
.get();
787 ir_constant
*ir_elt
= read_constant(elt
);
790 elements
.push_tail(ir_elt
);
794 if (elements_supplied
!= type
->length
) {
795 ir_read_error(values
, "expected exactly %u array elements, "
796 "given %u", type
->length
, elements_supplied
);
799 return new(mem_ctx
) ir_constant(type
, &elements
);
802 ir_constant_data data
= { { 0 } };
804 // Read in list of values (at most 16).
806 foreach_iter(exec_list_iterator
, it
, values
->subexpressions
) {
808 ir_read_error(values
, "expected at most 16 numbers");
812 s_expression
*expr
= (s_expression
*) it
.get();
814 if (type
->base_type
== GLSL_TYPE_FLOAT
) {
815 s_number
*value
= SX_AS_NUMBER(expr
);
817 ir_read_error(values
, "expected numbers");
820 data
.f
[k
] = value
->fvalue();
822 s_int
*value
= SX_AS_INT(expr
);
824 ir_read_error(values
, "expected integers");
828 switch (type
->base_type
) {
829 case GLSL_TYPE_UINT
: {
830 data
.u
[k
] = value
->value();
833 case GLSL_TYPE_INT
: {
834 data
.i
[k
] = value
->value();
837 case GLSL_TYPE_BOOL
: {
838 data
.b
[k
] = value
->value();
842 ir_read_error(values
, "unsupported constant type");
848 if (k
!= type
->components()) {
849 ir_read_error(values
, "expected %u constant values, found %u",
850 type
->components(), k
);
854 return new(mem_ctx
) ir_constant(type
, &data
);
857 ir_dereference_variable
*
858 ir_reader::read_var_ref(s_expression
*expr
)
861 s_pattern var_pat
[] = { "var_ref", s_var
};
863 if (MATCH(expr
, var_pat
)) {
864 ir_variable
*var
= state
->symbols
->get_variable(s_var
->value());
866 ir_read_error(expr
, "undeclared variable: %s", s_var
->value());
869 return new(mem_ctx
) ir_dereference_variable(var
);
875 ir_reader::read_dereference(s_expression
*expr
)
877 s_expression
*s_subject
;
878 s_expression
*s_index
;
881 s_pattern array_pat
[] = { "array_ref", s_subject
, s_index
};
882 s_pattern record_pat
[] = { "record_ref", s_subject
, s_field
};
884 ir_dereference_variable
*var_ref
= read_var_ref(expr
);
885 if (var_ref
!= NULL
) {
887 } else if (MATCH(expr
, array_pat
)) {
888 ir_rvalue
*subject
= read_rvalue(s_subject
);
889 if (subject
== NULL
) {
890 ir_read_error(NULL
, "when reading the subject of an array_ref");
894 ir_rvalue
*idx
= read_rvalue(s_index
);
896 ir_read_error(NULL
, "when reading the index of an array_ref");
899 return new(mem_ctx
) ir_dereference_array(subject
, idx
);
900 } else if (MATCH(expr
, record_pat
)) {
901 ir_rvalue
*subject
= read_rvalue(s_subject
);
902 if (subject
== NULL
) {
903 ir_read_error(NULL
, "when reading the subject of a record_ref");
906 return new(mem_ctx
) ir_dereference_record(subject
, s_field
->value());
912 ir_reader::read_texture(s_expression
*expr
)
914 s_symbol
*tag
= NULL
;
915 s_expression
*s_type
= NULL
;
916 s_expression
*s_sampler
= NULL
;
917 s_expression
*s_coord
= NULL
;
918 s_expression
*s_offset
= NULL
;
919 s_expression
*s_proj
= NULL
;
920 s_list
*s_shadow
= NULL
;
921 s_expression
*s_lod
= NULL
;
922 s_expression
*s_sample_index
= NULL
;
924 ir_texture_opcode op
= ir_tex
; /* silence warning */
926 s_pattern tex_pattern
[] =
927 { "tex", s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
};
928 s_pattern lod_pattern
[] =
929 { "lod", s_type
, s_sampler
, s_coord
};
930 s_pattern txf_pattern
[] =
931 { "txf", s_type
, s_sampler
, s_coord
, s_offset
, s_lod
};
932 s_pattern txf_ms_pattern
[] =
933 { "txf_ms", s_type
, s_sampler
, s_coord
, s_sample_index
};
934 s_pattern txs_pattern
[] =
935 { "txs", s_type
, s_sampler
, s_lod
};
936 s_pattern other_pattern
[] =
937 { tag
, s_type
, s_sampler
, s_coord
, s_offset
, s_proj
, s_shadow
, s_lod
};
939 if (MATCH(expr
, lod_pattern
)) {
941 } else if (MATCH(expr
, tex_pattern
)) {
943 } else if (MATCH(expr
, txf_pattern
)) {
945 } else if (MATCH(expr
, txf_ms_pattern
)) {
947 } else if (MATCH(expr
, txs_pattern
)) {
949 } else if (MATCH(expr
, other_pattern
)) {
950 op
= ir_texture::get_opcode(tag
->value());
954 ir_read_error(NULL
, "unexpected texture pattern %s", tag
->value());
958 ir_texture
*tex
= new(mem_ctx
) ir_texture(op
);
961 const glsl_type
*type
= read_type(s_type
);
963 ir_read_error(NULL
, "when reading type in (%s ...)",
964 tex
->opcode_string());
968 // Read sampler (must be a deref)
969 ir_dereference
*sampler
= read_dereference(s_sampler
);
970 if (sampler
== NULL
) {
971 ir_read_error(NULL
, "when reading sampler in (%s ...)",
972 tex
->opcode_string());
975 tex
->set_sampler(sampler
, type
);
978 // Read coordinate (any rvalue)
979 tex
->coordinate
= read_rvalue(s_coord
);
980 if (tex
->coordinate
== NULL
) {
981 ir_read_error(NULL
, "when reading coordinate in (%s ...)",
982 tex
->opcode_string());
986 if (op
!= ir_txf_ms
&& op
!= ir_lod
) {
987 // Read texel offset - either 0 or an rvalue.
988 s_int
*si_offset
= SX_AS_INT(s_offset
);
989 if (si_offset
== NULL
|| si_offset
->value() != 0) {
990 tex
->offset
= read_rvalue(s_offset
);
991 if (tex
->offset
== NULL
) {
992 ir_read_error(s_offset
, "expected 0 or an expression");
999 if (op
!= ir_txf
&& op
!= ir_txf_ms
&& op
!= ir_txs
&& op
!= ir_lod
) {
1000 s_int
*proj_as_int
= SX_AS_INT(s_proj
);
1001 if (proj_as_int
&& proj_as_int
->value() == 1) {
1002 tex
->projector
= NULL
;
1004 tex
->projector
= read_rvalue(s_proj
);
1005 if (tex
->projector
== NULL
) {
1006 ir_read_error(NULL
, "when reading projective divide in (%s ..)",
1007 tex
->opcode_string());
1012 if (s_shadow
->subexpressions
.is_empty()) {
1013 tex
->shadow_comparitor
= NULL
;
1015 tex
->shadow_comparitor
= read_rvalue(s_shadow
);
1016 if (tex
->shadow_comparitor
== NULL
) {
1017 ir_read_error(NULL
, "when reading shadow comparitor in (%s ..)",
1018 tex
->opcode_string());
1026 tex
->lod_info
.bias
= read_rvalue(s_lod
);
1027 if (tex
->lod_info
.bias
== NULL
) {
1028 ir_read_error(NULL
, "when reading LOD bias in (txb ...)");
1035 tex
->lod_info
.lod
= read_rvalue(s_lod
);
1036 if (tex
->lod_info
.lod
== NULL
) {
1037 ir_read_error(NULL
, "when reading LOD in (%s ...)",
1038 tex
->opcode_string());
1043 tex
->lod_info
.sample_index
= read_rvalue(s_sample_index
);
1044 if (tex
->lod_info
.sample_index
== NULL
) {
1045 ir_read_error(NULL
, "when reading sample_index in (txf_ms ...)");
1050 s_expression
*s_dx
, *s_dy
;
1051 s_pattern dxdy_pat
[] = { s_dx
, s_dy
};
1052 if (!MATCH(s_lod
, dxdy_pat
)) {
1053 ir_read_error(s_lod
, "expected (dPdx dPdy) in (txd ...)");
1056 tex
->lod_info
.grad
.dPdx
= read_rvalue(s_dx
);
1057 if (tex
->lod_info
.grad
.dPdx
== NULL
) {
1058 ir_read_error(NULL
, "when reading dPdx in (txd ...)");
1061 tex
->lod_info
.grad
.dPdy
= read_rvalue(s_dy
);
1062 if (tex
->lod_info
.grad
.dPdy
== NULL
) {
1063 ir_read_error(NULL
, "when reading dPdy in (txd ...)");
1069 // tex and lod don't have any extra parameters.
1076 ir_reader::read_emit_vertex(s_expression
*expr
)
1078 s_pattern pat
[] = { "emit-vertex" };
1080 if (MATCH(expr
, pat
)) {
1081 return new(mem_ctx
) ir_emit_vertex();
1083 ir_read_error(NULL
, "when reading emit-vertex");
1088 ir_reader::read_end_primitive(s_expression
*expr
)
1090 s_pattern pat
[] = { "end-primitive" };
1092 if (MATCH(expr
, pat
)) {
1093 return new(mem_ctx
) ir_end_primitive();
1095 ir_read_error(NULL
, "when reading end-primitive");