2 * yosys -- Yosys Open SYnthesis Suite
4 * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 * This is the AST frontend library.
22 * The AST frontend library is not a frontend on it's own but provides a
23 * generic abstract syntax tree (AST) abstraction for HDL code and can be
24 * used by HDL frontends. See "ast.h" for an overview of the API and the
25 * Verilog frontend for an usage example.
29 #include "kernel/log.h"
30 #include "libs/sha1/sha1.h"
31 #include "frontends/verilog/verilog_frontend.h"
42 using namespace AST_INTERNAL
;
44 // Process a format string and arguments for $display, $write, $sprintf, etc
46 std::string
AstNode::process_format_str(const std::string
&sformat
, int next_arg
, int stage
, int width_hint
, bool sign_hint
) {
47 // Other arguments are placeholders. Process the string as we go through it
49 for (size_t i
= 0; i
< sformat
.length(); i
++)
52 if (sformat
[i
] == '%')
54 // If there's no next character, that's a problem
55 if (i
+1 >= sformat
.length())
56 log_file_error(filename
, location
.first_line
, "System task `%s' called with `%%' at end of string.\n", str
.c_str());
58 char cformat
= sformat
[++i
];
60 // %% is special, does not need a matching argument
67 // Simplify the argument
68 AstNode
*node_arg
= nullptr;
70 // Everything from here on depends on the format specifier
79 if (next_arg
>= GetSize(children
))
80 log_file_error(filename
, location
.first_line
, "Missing argument for %%%c format specifier in system task `%s'.\n",
81 cformat
, str
.c_str());
83 node_arg
= children
[next_arg
++];
84 while (node_arg
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
85 if (node_arg
->type
!= AST_CONSTANT
)
86 log_file_error(filename
, location
.first_line
, "Failed to evaluate system task `%s' with non-constant argument.\n", str
.c_str());
94 log_file_error(filename
, location
.first_line
, "System task `%s' called with invalid/unsupported format specifier.\n", str
.c_str());
102 sout
+= node_arg
->bitsAsConst().decode_string();
109 snprintf(tmp
, sizeof(tmp
), "%d", node_arg
->bitsAsConst().as_int());
118 snprintf(tmp
, sizeof(tmp
), "%x", node_arg
->bitsAsConst().as_int());
125 sout
+= log_id(current_module
->name
);
133 // not a format specifier
141 // convert the AST into a simpler AST that has all parameters substituted by their
142 // values, unrolled for-loops, expanded generate blocks, etc. when this function
143 // is done with an AST it can be converted into RTLIL using genRTLIL().
145 // this function also does all name resolving and sets the id2ast member of all
146 // nodes that link to a different node using names and lexical scoping.
147 bool AstNode::simplify(bool const_fold
, bool at_zero
, bool in_lvalue
, int stage
, int width_hint
, bool sign_hint
, bool in_param
)
149 static int recursion_counter
= 0;
150 static bool deep_recursion_warning
= false;
152 if (recursion_counter
++ == 1000 && deep_recursion_warning
) {
153 log_warning("Deep recursion in AST simplifier.\nDoes this design contain insanely long expressions?\n");
154 deep_recursion_warning
= false;
157 AstNode
*newNode
= NULL
;
158 bool did_something
= false;
161 log("-------------\n");
162 log("AST simplify[%d] depth %d at %s:%d on %s %p:\n", stage
, recursion_counter
, filename
.c_str(), location
.first_line
, type2str(type
).c_str(), this);
163 log("const_fold=%d, at_zero=%d, in_lvalue=%d, stage=%d, width_hint=%d, sign_hint=%d, in_param=%d\n",
164 int(const_fold
), int(at_zero
), int(in_lvalue
), int(stage
), int(width_hint
), int(sign_hint
), int(in_param
));
165 // dumpAst(NULL, "> ");
170 log_assert(type
== AST_MODULE
|| type
== AST_INTERFACE
);
172 deep_recursion_warning
= true;
173 while (simplify(const_fold
, at_zero
, in_lvalue
, 1, width_hint
, sign_hint
, in_param
)) { }
175 if (!flag_nomem2reg
&& !get_bool_attribute("\\nomem2reg"))
177 dict
<AstNode
*, pool
<std::string
>> mem2reg_places
;
178 dict
<AstNode
*, uint32_t> mem2reg_candidates
, dummy_proc_flags
;
179 uint32_t flags
= flag_mem2reg
? AstNode::MEM2REG_FL_ALL
: 0;
180 mem2reg_as_needed_pass1(mem2reg_places
, mem2reg_candidates
, dummy_proc_flags
, flags
);
182 pool
<AstNode
*> mem2reg_set
;
183 for (auto &it
: mem2reg_candidates
)
185 AstNode
*mem
= it
.first
;
186 uint32_t memflags
= it
.second
;
187 bool this_nomeminit
= flag_nomeminit
;
188 log_assert((memflags
& ~0x00ffff00) == 0);
190 if (mem
->get_bool_attribute("\\nomem2reg"))
193 if (mem
->get_bool_attribute("\\nomeminit") || get_bool_attribute("\\nomeminit"))
194 this_nomeminit
= true;
196 if (memflags
& AstNode::MEM2REG_FL_FORCED
)
197 goto silent_activate
;
199 if (memflags
& AstNode::MEM2REG_FL_EQ2
)
200 goto verbose_activate
;
202 if (memflags
& AstNode::MEM2REG_FL_SET_ASYNC
)
203 goto verbose_activate
;
205 if ((memflags
& AstNode::MEM2REG_FL_SET_INIT
) && (memflags
& AstNode::MEM2REG_FL_SET_ELSE
) && this_nomeminit
)
206 goto verbose_activate
;
208 if (memflags
& AstNode::MEM2REG_FL_CMPLX_LHS
)
209 goto verbose_activate
;
211 if ((memflags
& AstNode::MEM2REG_FL_CONST_LHS
) && !(memflags
& AstNode::MEM2REG_FL_VAR_LHS
))
212 goto verbose_activate
;
214 // log("Note: Not replacing memory %s with list of registers (flags=0x%08lx).\n", mem->str.c_str(), long(memflags));
218 if (mem2reg_set
.count(mem
) == 0) {
219 std::string message
= stringf("Replacing memory %s with list of registers.", mem
->str
.c_str());
220 bool first_element
= true;
221 for (auto &place
: mem2reg_places
[it
.first
]) {
222 message
+= stringf("%s%s", first_element
? " See " : ", ", place
.c_str());
223 first_element
= false;
225 log_warning("%s\n", message
.c_str());
229 // log("Note: Replacing memory %s with list of registers (flags=0x%08lx).\n", mem->str.c_str(), long(memflags));
230 mem2reg_set
.insert(mem
);
233 for (auto node
: mem2reg_set
)
235 int mem_width
, mem_size
, addr_bits
;
236 node
->meminfo(mem_width
, mem_size
, addr_bits
);
238 int data_range_left
= node
->children
[0]->range_left
;
239 int data_range_right
= node
->children
[0]->range_right
;
241 if (node
->children
[0]->range_swapped
)
242 std::swap(data_range_left
, data_range_right
);
244 for (int i
= 0; i
< mem_size
; i
++) {
245 AstNode
*reg
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
,
246 mkconst_int(data_range_left
, true), mkconst_int(data_range_right
, true)));
247 reg
->str
= stringf("%s[%d]", node
->str
.c_str(), i
);
249 reg
->is_signed
= node
->is_signed
;
250 for (auto &it
: node
->attributes
)
251 if (it
.first
!= ID(mem2reg
))
252 reg
->attributes
.emplace(it
.first
, it
.second
->clone());
253 reg
->filename
= node
->filename
;
254 reg
->location
= node
->location
;
255 children
.push_back(reg
);
256 while (reg
->simplify(true, false, false, 1, -1, false, false)) { }
260 AstNode
*async_block
= NULL
;
261 while (mem2reg_as_needed_pass2(mem2reg_set
, this, NULL
, async_block
)) { }
263 vector
<AstNode
*> delnodes
;
264 mem2reg_remove(mem2reg_set
, delnodes
);
266 for (auto node
: delnodes
)
270 while (simplify(const_fold
, at_zero
, in_lvalue
, 2, width_hint
, sign_hint
, in_param
)) { }
275 current_filename
= filename
;
277 // we do not look inside a task or function
278 // (but as soon as a task or function is instantiated we process the generated AST as usual)
279 if (type
== AST_FUNCTION
|| type
== AST_TASK
) {
284 // deactivate all calls to non-synthesis system tasks
285 // note that $display, $finish, and $stop are used for synthesis-time DRC so they're not in this list
286 if ((type
== AST_FCALL
|| type
== AST_TCALL
) && (str
== "$strobe" || str
== "$monitor" || str
== "$time" ||
287 str
== "$dumpfile" || str
== "$dumpvars" || str
== "$dumpon" || str
== "$dumpoff" || str
== "$dumpall")) {
288 log_file_warning(filename
, location
.first_line
, "Ignoring call to system %s %s.\n", type
== AST_FCALL
? "function" : "task", str
.c_str());
293 if ((type
== AST_TCALL
) && (str
== "$display" || str
== "$write") && (!current_always
|| current_always
->type
!= AST_INITIAL
)) {
294 log_file_warning(filename
, location
.first_line
, "System task `%s' outside initial block is unsupported.\n", str
.c_str());
299 // print messages if this a call to $display() or $write()
300 // This code implements only a small subset of Verilog-2005 $display() format specifiers,
301 // but should be good enough for most uses
302 if ((type
== AST_TCALL
) && ((str
== "$display") || (str
== "$write")))
304 int nargs
= GetSize(children
);
306 log_file_error(filename
, location
.first_line
, "System task `%s' got %d arguments, expected >= 1.\n",
307 str
.c_str(), int(children
.size()));
309 // First argument is the format string
310 AstNode
*node_string
= children
[0];
311 while (node_string
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
312 if (node_string
->type
!= AST_CONSTANT
)
313 log_file_error(filename
, location
.first_line
, "Failed to evaluate system task `%s' with non-constant 1st argument.\n", str
.c_str());
314 std::string sformat
= node_string
->bitsAsConst().decode_string();
315 std::string sout
= process_format_str(sformat
, 1, stage
, width_hint
, sign_hint
);
316 // Finally, print the message (only include a \n for $display, not for $write)
317 log("%s", sout
.c_str());
318 if (str
== "$display")
324 // activate const folding if this is anything that must be evaluated statically (ranges, parameters, attributes, etc.)
325 if (type
== AST_WIRE
|| type
== AST_PARAMETER
|| type
== AST_LOCALPARAM
|| type
== AST_ENUM_ITEM
|| type
== AST_DEFPARAM
|| type
== AST_PARASET
|| type
== AST_RANGE
|| type
== AST_PREFIX
|| type
== AST_TYPEDEF
)
327 if (type
== AST_IDENTIFIER
&& current_scope
.count(str
) > 0 && (current_scope
[str
]->type
== AST_PARAMETER
|| current_scope
[str
]->type
== AST_LOCALPARAM
|| current_scope
[str
]->type
== AST_ENUM_ITEM
))
330 // in certain cases a function must be evaluated constant. this is what in_param controls.
331 if (type
== AST_PARAMETER
|| type
== AST_LOCALPARAM
|| type
== AST_DEFPARAM
|| type
== AST_PARASET
|| type
== AST_PREFIX
)
334 std::map
<std::string
, AstNode
*> backup_scope
;
336 // create name resolution entries for all objects with names
337 // also merge multiple declarations for the same wire (e.g. "output foobar; reg foobar;")
338 if (type
== AST_MODULE
) {
339 current_scope
.clear();
340 std::map
<std::string
, AstNode
*> this_wire_scope
;
341 for (size_t i
= 0; i
< children
.size(); i
++) {
342 AstNode
*node
= children
[i
];
344 if (node
->type
== AST_WIRE
) {
345 if (node
->children
.size() == 1 && node
->children
[0]->type
== AST_RANGE
) {
346 for (auto c
: node
->children
[0]->children
) {
347 if (!c
->is_simple_const_expr()) {
348 if (attributes
.count("\\dynports"))
349 delete attributes
.at("\\dynports");
350 attributes
["\\dynports"] = AstNode::mkconst_int(1, true);
354 if (this_wire_scope
.count(node
->str
) > 0) {
355 AstNode
*first_node
= this_wire_scope
[node
->str
];
356 if (first_node
->is_input
&& node
->is_reg
)
357 goto wires_are_incompatible
;
358 if (!node
->is_input
&& !node
->is_output
&& node
->is_reg
&& node
->children
.size() == 0)
359 goto wires_are_compatible
;
360 if (first_node
->children
.size() == 0 && node
->children
.size() == 1 && node
->children
[0]->type
== AST_RANGE
) {
361 AstNode
*r
= node
->children
[0];
362 if (r
->range_valid
&& r
->range_left
== 0 && r
->range_right
== 0) {
364 node
->children
.pop_back();
367 if (first_node
->children
.size() != node
->children
.size())
368 goto wires_are_incompatible
;
369 for (size_t j
= 0; j
< node
->children
.size(); j
++) {
370 AstNode
*n1
= first_node
->children
[j
], *n2
= node
->children
[j
];
371 if (n1
->type
== AST_RANGE
&& n2
->type
== AST_RANGE
&& n1
->range_valid
&& n2
->range_valid
) {
372 if (n1
->range_left
!= n2
->range_left
)
373 goto wires_are_incompatible
;
374 if (n1
->range_right
!= n2
->range_right
)
375 goto wires_are_incompatible
;
376 } else if (*n1
!= *n2
)
377 goto wires_are_incompatible
;
379 if (first_node
->range_left
!= node
->range_left
)
380 goto wires_are_incompatible
;
381 if (first_node
->range_right
!= node
->range_right
)
382 goto wires_are_incompatible
;
383 if (first_node
->port_id
== 0 && (node
->is_input
|| node
->is_output
))
384 goto wires_are_incompatible
;
385 wires_are_compatible
:
387 first_node
->is_input
= true;
389 first_node
->is_output
= true;
391 first_node
->is_reg
= true;
393 first_node
->is_logic
= true;
395 first_node
->is_signed
= true;
396 for (auto &it
: node
->attributes
) {
397 if (first_node
->attributes
.count(it
.first
) > 0)
398 delete first_node
->attributes
[it
.first
];
399 first_node
->attributes
[it
.first
] = it
.second
->clone();
401 children
.erase(children
.begin()+(i
--));
402 did_something
= true;
405 wires_are_incompatible
:
407 log_file_error(filename
, location
.first_line
, "Incompatible re-declaration of wire %s.\n", node
->str
.c_str());
410 this_wire_scope
[node
->str
] = node
;
412 // these nodes appear at the top level in a module and can define names
413 if (node
->type
== AST_PARAMETER
|| node
->type
== AST_LOCALPARAM
|| node
->type
== AST_WIRE
|| node
->type
== AST_AUTOWIRE
|| node
->type
== AST_GENVAR
||
414 node
->type
== AST_MEMORY
|| node
->type
== AST_FUNCTION
|| node
->type
== AST_TASK
|| node
->type
== AST_DPI_FUNCTION
|| node
->type
== AST_CELL
||
415 node
->type
== AST_TYPEDEF
) {
416 backup_scope
[node
->str
] = current_scope
[node
->str
];
417 current_scope
[node
->str
] = node
;
419 if (node
->type
== AST_ENUM
) {
420 current_scope
[node
->str
] = node
;
421 for (auto enode
: node
->children
) {
422 log_assert(enode
->type
==AST_ENUM_ITEM
);
423 if (current_scope
.count(enode
->str
) == 0) {
424 current_scope
[enode
->str
] = enode
;
429 for (size_t i
= 0; i
< children
.size(); i
++) {
430 AstNode
*node
= children
[i
];
431 if (node
->type
== AST_PARAMETER
|| node
->type
== AST_LOCALPARAM
|| node
->type
== AST_WIRE
|| node
->type
== AST_AUTOWIRE
|| node
->type
== AST_MEMORY
|| node
->type
== AST_TYPEDEF
)
432 while (node
->simplify(true, false, false, 1, -1, false, node
->type
== AST_PARAMETER
|| node
->type
== AST_LOCALPARAM
))
433 did_something
= true;
434 if (node
->type
== AST_ENUM
) {
435 for (auto enode
: node
->children
){
436 log_assert(enode
->type
==AST_ENUM_ITEM
);
437 while (node
->simplify(true, false, false, 1, -1, false, in_param
))
438 did_something
= true;
444 auto backup_current_block
= current_block
;
445 auto backup_current_block_child
= current_block_child
;
446 auto backup_current_top_block
= current_top_block
;
447 auto backup_current_always
= current_always
;
448 auto backup_current_always_clocked
= current_always_clocked
;
450 if (type
== AST_ALWAYS
|| type
== AST_INITIAL
)
452 if (current_always
!= nullptr)
453 log_file_error(filename
, location
.first_line
, "Invalid nesting of always blocks and/or initializations.\n");
455 current_always
= this;
456 current_always_clocked
= false;
458 if (type
== AST_ALWAYS
)
459 for (auto child
: children
) {
460 if (child
->type
== AST_POSEDGE
|| child
->type
== AST_NEGEDGE
)
461 current_always_clocked
= true;
462 if (child
->type
== AST_EDGE
&& GetSize(child
->children
) == 1 &&
463 child
->children
[0]->type
== AST_IDENTIFIER
&& child
->children
[0]->str
== "\\$global_clock")
464 current_always_clocked
= true;
468 int backup_width_hint
= width_hint
;
469 bool backup_sign_hint
= sign_hint
;
471 bool detect_width_simple
= false;
472 bool child_0_is_self_determined
= false;
473 bool child_1_is_self_determined
= false;
474 bool child_2_is_self_determined
= false;
475 bool children_are_self_determined
= false;
476 bool reset_width_after_children
= false;
483 while (!children
[0]->basic_prep
&& children
[0]->simplify(false, false, true, stage
, -1, false, in_param
) == true)
484 did_something
= true;
485 while (!children
[1]->basic_prep
&& children
[1]->simplify(false, false, false, stage
, -1, false, in_param
) == true)
486 did_something
= true;
487 children
[0]->detectSignWidth(backup_width_hint
, backup_sign_hint
);
488 children
[1]->detectSignWidth(width_hint
, sign_hint
);
489 width_hint
= max(width_hint
, backup_width_hint
);
490 child_0_is_self_determined
= true;
491 // test only once, before optimizations and memory mappings but after assignment LHS was mapped to an identifier
492 if (children
[0]->id2ast
&& !children
[0]->was_checked
) {
493 if ((type
== AST_ASSIGN_LE
|| type
== AST_ASSIGN_EQ
) && children
[0]->id2ast
->is_logic
)
494 children
[0]->id2ast
->is_reg
= true; // if logic type is used in a block asignment
495 if ((type
== AST_ASSIGN_LE
|| type
== AST_ASSIGN_EQ
) && !children
[0]->id2ast
->is_reg
)
496 log_warning("wire '%s' is assigned in a block at %s:%d.%d-%d.%d.\n", children
[0]->str
.c_str(), filename
.c_str(), location
.first_line
, location
.first_column
, location
.last_line
, location
.last_column
);
497 if (type
== AST_ASSIGN
&& children
[0]->id2ast
->is_reg
) {
498 bool is_rand_reg
= false;
499 if (children
[1]->type
== AST_FCALL
) {
500 if (children
[1]->str
== "\\$anyconst")
502 if (children
[1]->str
== "\\$anyseq")
504 if (children
[1]->str
== "\\$allconst")
506 if (children
[1]->str
== "\\$allseq")
510 log_warning("reg '%s' is assigned in a continuous assignment at %s:%d.%d-%d.%d.\n", children
[0]->str
.c_str(), filename
.c_str(), location
.first_line
, location
.first_column
, location
.last_line
, location
.last_column
);
512 children
[0]->was_checked
= true;
517 //log("\nENUM %s: %d child %d\n", str.c_str(), basic_prep, children[0]->basic_prep);
519 for (auto item_node
: children
) {
520 while (!item_node
->basic_prep
&& item_node
->simplify(false, false, false, stage
, -1, false, in_param
))
521 did_something
= true;
523 // allocate values (called more than once)
524 allocateDefaultEnumValues();
530 while (!children
[0]->basic_prep
&& children
[0]->simplify(false, false, false, stage
, -1, false, true) == true)
531 did_something
= true;
532 children
[0]->detectSignWidth(width_hint
, sign_hint
);
533 if (children
.size() > 1 && children
[1]->type
== AST_RANGE
) {
534 while (!children
[1]->basic_prep
&& children
[1]->simplify(false, false, false, stage
, -1, false, true) == true)
535 did_something
= true;
536 if (!children
[1]->range_valid
)
537 log_file_error(filename
, location
.first_line
, "Non-constant width range on parameter decl.\n");
538 width_hint
= max(width_hint
, children
[1]->range_left
- children
[1]->range_right
+ 1);
542 while (!children
[0]->basic_prep
&& children
[0]->simplify(false, false, false, stage
, -1, false, in_param
))
543 did_something
= true;
544 children
[0]->detectSignWidth(width_hint
, sign_hint
);
545 if (children
.size() > 1 && children
[1]->type
== AST_RANGE
) {
546 while (!children
[1]->basic_prep
&& children
[1]->simplify(false, false, false, stage
, -1, false, in_param
))
547 did_something
= true;
548 if (!children
[1]->range_valid
)
549 log_file_error(filename
, location
.first_line
, "Non-constant width range on enum item decl.\n");
550 width_hint
= max(width_hint
, children
[1]->range_left
- children
[1]->range_right
+ 1);
556 case AST_TO_UNSIGNED
:
562 case AST_REDUCE_XNOR
:
563 case AST_REDUCE_BOOL
:
564 detect_width_simple
= true;
565 children_are_self_determined
= true;
580 detect_width_simple
= true;
584 case AST_SHIFT_RIGHT
:
585 case AST_SHIFT_SLEFT
:
586 case AST_SHIFT_SRIGHT
:
588 detect_width_simple
= true;
589 child_1_is_self_determined
= true;
602 for (auto child
: children
) {
603 while (!child
->basic_prep
&& child
->simplify(false, false, in_lvalue
, stage
, -1, false, in_param
) == true)
604 did_something
= true;
605 child
->detectSignWidthWorker(width_hint
, sign_hint
);
607 reset_width_after_children
= true;
613 detect_width_simple
= true;
614 children_are_self_determined
= true;
618 detect_width_simple
= true;
619 child_0_is_self_determined
= true;
623 detect_width_simple
= true;
624 children_are_self_determined
= true;
629 children_are_self_determined
= true;
637 if (detect_width_simple
&& width_hint
< 0) {
638 if (type
== AST_REPLICATE
)
639 while (children
[0]->simplify(true, false, in_lvalue
, stage
, -1, false, true) == true)
640 did_something
= true;
641 for (auto child
: children
)
642 while (!child
->basic_prep
&& child
->simplify(false, false, in_lvalue
, stage
, -1, false, in_param
) == true)
643 did_something
= true;
644 detectSignWidth(width_hint
, sign_hint
);
647 if (type
== AST_FCALL
&& str
== "\\$past")
648 detectSignWidth(width_hint
, sign_hint
);
650 if (type
== AST_TERNARY
) {
651 int width_hint_left
, width_hint_right
;
652 bool sign_hint_left
, sign_hint_right
;
653 bool found_real_left
, found_real_right
;
654 children
[1]->detectSignWidth(width_hint_left
, sign_hint_left
, &found_real_left
);
655 children
[2]->detectSignWidth(width_hint_right
, sign_hint_right
, &found_real_right
);
656 if (found_real_left
|| found_real_right
) {
657 child_1_is_self_determined
= true;
658 child_2_is_self_determined
= true;
662 if (type
== AST_CONDX
&& children
.size() > 0 && children
.at(0)->type
== AST_CONSTANT
) {
663 for (auto &bit
: children
.at(0)->bits
)
664 if (bit
== State::Sz
|| bit
== State::Sx
)
668 if (type
== AST_CONDZ
&& children
.size() > 0 && children
.at(0)->type
== AST_CONSTANT
) {
669 for (auto &bit
: children
.at(0)->bits
)
670 if (bit
== State::Sz
)
674 if (const_fold
&& type
== AST_CASE
)
676 while (children
[0]->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
)) { }
677 if (children
[0]->type
== AST_CONSTANT
&& children
[0]->bits_only_01()) {
678 std::vector
<AstNode
*> new_children
;
679 new_children
.push_back(children
[0]);
680 for (int i
= 1; i
< GetSize(children
); i
++) {
681 AstNode
*child
= children
[i
];
682 log_assert(child
->type
== AST_COND
|| child
->type
== AST_CONDX
|| child
->type
== AST_CONDZ
);
683 for (auto v
: child
->children
) {
684 if (v
->type
== AST_DEFAULT
)
685 goto keep_const_cond
;
686 if (v
->type
== AST_BLOCK
)
688 while (v
->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
)) { }
689 if (v
->type
== AST_CONSTANT
&& v
->bits_only_01()) {
690 if (v
->bits
== children
[0]->bits
) {
691 while (i
+1 < GetSize(children
))
692 delete children
[++i
];
693 goto keep_const_cond
;
697 goto keep_const_cond
;
701 new_children
.push_back(child
);
705 new_children
.swap(children
);
709 // simplify all children first
710 // (iterate by index as e.g. auto wires can add new children in the process)
711 for (size_t i
= 0; i
< children
.size(); i
++) {
712 bool did_something_here
= true;
713 bool backup_flag_autowire
= flag_autowire
;
714 if ((type
== AST_GENFOR
|| type
== AST_FOR
) && i
>= 3)
716 if ((type
== AST_GENIF
|| type
== AST_GENCASE
) && i
>= 1)
718 if (type
== AST_GENBLOCK
)
720 if (type
== AST_BLOCK
&& !str
.empty())
722 if (type
== AST_PREFIX
&& i
>= 1)
724 if (type
== AST_DEFPARAM
&& i
== 0)
725 flag_autowire
= true;
726 while (did_something_here
&& i
< children
.size()) {
727 bool const_fold_here
= const_fold
, in_lvalue_here
= in_lvalue
;
728 int width_hint_here
= width_hint
;
729 bool sign_hint_here
= sign_hint
;
730 bool in_param_here
= in_param
;
731 if (i
== 0 && (type
== AST_REPLICATE
|| type
== AST_WIRE
))
732 const_fold_here
= true, in_param_here
= true;
733 if (type
== AST_PARAMETER
|| type
== AST_LOCALPARAM
)
734 const_fold_here
= true;
735 if (i
== 0 && (type
== AST_ASSIGN
|| type
== AST_ASSIGN_EQ
|| type
== AST_ASSIGN_LE
))
736 in_lvalue_here
= true;
737 if (type
== AST_BLOCK
) {
738 current_block
= this;
739 current_block_child
= children
[i
];
741 if ((type
== AST_ALWAYS
|| type
== AST_INITIAL
) && children
[i
]->type
== AST_BLOCK
)
742 current_top_block
= children
[i
];
743 if (i
== 0 && child_0_is_self_determined
)
744 width_hint_here
= -1, sign_hint_here
= false;
745 if (i
== 1 && child_1_is_self_determined
)
746 width_hint_here
= -1, sign_hint_here
= false;
747 if (i
== 2 && child_2_is_self_determined
)
748 width_hint_here
= -1, sign_hint_here
= false;
749 if (children_are_self_determined
)
750 width_hint_here
= -1, sign_hint_here
= false;
751 did_something_here
= children
[i
]->simplify(const_fold_here
, at_zero
, in_lvalue_here
, stage
, width_hint_here
, sign_hint_here
, in_param_here
);
752 if (did_something_here
)
753 did_something
= true;
755 if (stage
== 2 && children
[i
]->type
== AST_INITIAL
&& current_ast_mod
!= this) {
756 current_ast_mod
->children
.push_back(children
[i
]);
757 children
.erase(children
.begin() + (i
--));
758 did_something
= true;
760 flag_autowire
= backup_flag_autowire
;
762 for (auto &attr
: attributes
) {
763 while (attr
.second
->simplify(true, false, false, stage
, -1, false, true))
764 did_something
= true;
767 if (reset_width_after_children
) {
768 width_hint
= backup_width_hint
;
769 sign_hint
= backup_sign_hint
;
771 detectSignWidth(width_hint
, sign_hint
);
774 current_block
= backup_current_block
;
775 current_block_child
= backup_current_block_child
;
776 current_top_block
= backup_current_top_block
;
777 current_always
= backup_current_always
;
778 current_always_clocked
= backup_current_always_clocked
;
780 for (auto it
= backup_scope
.begin(); it
!= backup_scope
.end(); it
++) {
781 if (it
->second
== NULL
)
782 current_scope
.erase(it
->first
);
784 current_scope
[it
->first
] = it
->second
;
787 current_filename
= filename
;
789 if (type
== AST_MODULE
)
790 current_scope
.clear();
792 // convert defparam nodes to cell parameters
793 if (type
== AST_DEFPARAM
&& !children
.empty())
795 if (children
[0]->type
!= AST_IDENTIFIER
)
796 log_file_error(filename
, location
.first_line
, "Module name in defparam contains non-constant expressions!\n");
798 string modname
, paramname
= children
[0]->str
;
800 size_t pos
= paramname
.rfind('.');
802 while (pos
!= 0 && pos
!= std::string::npos
)
804 modname
= paramname
.substr(0, pos
);
806 if (current_scope
.count(modname
))
809 pos
= paramname
.rfind('.', pos
- 1);
812 if (pos
== std::string::npos
)
813 log_file_error(filename
, location
.first_line
, "Can't find object for defparam `%s`!\n", RTLIL::unescape_id(paramname
).c_str());
815 paramname
= "\\" + paramname
.substr(pos
+1);
817 if (current_scope
.at(modname
)->type
!= AST_CELL
)
818 log_file_error(filename
, location
.first_line
, "Defparam argument `%s . %s` does not match a cell!\n",
819 RTLIL::unescape_id(modname
).c_str(), RTLIL::unescape_id(paramname
).c_str());
821 AstNode
*paraset
= new AstNode(AST_PARASET
, children
[1]->clone(), GetSize(children
) > 2 ? children
[2]->clone() : NULL
);
822 paraset
->str
= paramname
;
824 AstNode
*cell
= current_scope
.at(modname
);
825 cell
->children
.insert(cell
->children
.begin() + 1, paraset
);
830 if (type
== AST_TYPEDEF
) {
831 log_assert(children
.size() == 1);
832 log_assert(children
[0]->type
== AST_WIRE
|| children
[0]->type
== AST_MEMORY
);
833 while(children
[0]->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
))
834 did_something
= true;
835 log_assert(!children
[0]->is_custom_type
);
838 // resolve types of wires
839 if (type
== AST_WIRE
|| type
== AST_MEMORY
) {
840 if (is_custom_type
) {
841 log_assert(children
.size() >= 1);
842 log_assert(children
[0]->type
== AST_WIRETYPE
);
843 if (!current_scope
.count(children
[0]->str
))
844 log_file_error(filename
, location
.first_line
, "Unknown identifier `%s' used as type name\n", children
[0]->str
.c_str());
845 AstNode
*resolved_type
= current_scope
.at(children
[0]->str
);
846 if (resolved_type
->type
!= AST_TYPEDEF
)
847 log_file_error(filename
, location
.first_line
, "`%s' does not name a type\n", children
[0]->str
.c_str());
848 log_assert(resolved_type
->children
.size() == 1);
849 AstNode
*templ
= resolved_type
->children
[0];
850 // Remove type reference
852 children
.erase(children
.begin());
854 // Ensure typedef itself is fully simplified
855 while(templ
->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
)) {};
857 if (type
== AST_WIRE
)
859 is_reg
= templ
->is_reg
;
860 is_logic
= templ
->is_logic
;
861 is_signed
= templ
->is_signed
;
862 is_string
= templ
->is_string
;
863 is_custom_type
= templ
->is_custom_type
;
865 range_valid
= templ
->range_valid
;
866 range_swapped
= templ
->range_swapped
;
867 range_left
= templ
->range_left
;
868 range_right
= templ
->range_right
;
869 attributes
["\\wiretype"] = mkconst_str(resolved_type
->str
);
871 if (templ
->attributes
.count("\\enum_type")){
872 //get reference to enum node:
873 std::string enum_type
= templ
->attributes
["\\enum_type"]->str
.c_str();
874 // log("enum_type=%s (count=%lu)\n", enum_type.c_str(), current_scope.count(enum_type));
875 // log("current scope:\n");
876 // for (auto &it : current_scope)
877 // log(" %s\n", it.first.c_str());
878 log_assert(current_scope
.count(enum_type
) == 1);
879 AstNode
*enum_node
= current_scope
.at(enum_type
);
880 log_assert(enum_node
->type
== AST_ENUM
);
881 //get width from 1st enum item:
882 log_assert(enum_node
->children
.size() >= 1);
883 AstNode
*enum_item0
= enum_node
->children
[0];
884 log_assert(enum_item0
->type
== AST_ENUM_ITEM
);
886 if (!enum_item0
->range_valid
)
888 else if (enum_item0
->range_swapped
)
889 width
= enum_item0
->range_right
- enum_item0
->range_left
+ 1;
891 width
= enum_item0
->range_left
- enum_item0
->range_right
+ 1;
892 log_assert(width
> 0);
893 //add declared enum items:
894 for (auto enum_item
: enum_node
->children
){
895 log_assert(enum_item
->type
== AST_ENUM_ITEM
);
898 if (enum_item
->children
.size() == 1){
900 } else if (enum_item
->children
.size() == 2){
901 log_assert(enum_item
->children
[1]->type
== AST_RANGE
);
902 is_signed
= enum_item
->children
[1]->is_signed
;
904 log_error("enum_item children size==%lu, expected 1 or 2 for %s (%s)\n",
905 enum_item
->children
.size(),
906 enum_item
->str
.c_str(), enum_node
->str
.c_str()
909 //start building attribute string
910 std::string enum_item_str
= "\\enum_";
911 enum_item_str
.append(std::to_string(width
));
912 enum_item_str
.append("_");
913 //get enum item value
914 if(enum_item
->children
[0]->type
!= AST_CONSTANT
){
915 log_error("expected const, got %s for %s (%s)\n",
916 type2str(enum_item
->children
[0]->type
).c_str(),
917 enum_item
->str
.c_str(), enum_node
->str
.c_str()
920 int val
= enum_item
->children
[0]->asInt(is_signed
);
921 enum_item_str
.append(std::to_string(val
));
922 //set attribute for available val to enum item name mappings
923 attributes
[enum_item_str
.c_str()] = mkconst_str(enum_item
->str
);
927 // Insert clones children from template at beginning
928 for (int i
= 0; i
< GetSize(templ
->children
); i
++)
929 children
.insert(children
.begin() + i
, templ
->children
[i
]->clone());
931 if (type
== AST_MEMORY
&& GetSize(children
) == 1) {
932 // Single-bit memories must have [0:0] range
933 AstNode
*rng
= new AstNode(AST_RANGE
);
934 rng
->children
.push_back(AstNode::mkconst_int(0, true));
935 rng
->children
.push_back(AstNode::mkconst_int(0, true));
936 children
.insert(children
.begin(), rng
);
939 did_something
= true;
941 log_assert(!is_custom_type
);
944 // resolve types of parameters
945 if (type
== AST_LOCALPARAM
|| type
== AST_PARAMETER
) {
946 if (is_custom_type
) {
947 log_assert(children
.size() == 2);
948 log_assert(children
[1]->type
== AST_WIRETYPE
);
949 if (!current_scope
.count(children
[1]->str
))
950 log_file_error(filename
, location
.first_line
, "Unknown identifier `%s' used as type name\n", children
[1]->str
.c_str());
951 AstNode
*resolved_type
= current_scope
.at(children
[1]->str
);
952 if (resolved_type
->type
!= AST_TYPEDEF
)
953 log_file_error(filename
, location
.first_line
, "`%s' does not name a type\n", children
[1]->str
.c_str());
954 log_assert(resolved_type
->children
.size() == 1);
955 AstNode
*templ
= resolved_type
->children
[0];
959 // Ensure typedef itself is fully simplified
960 while(templ
->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
)) {};
962 if (templ
->type
== AST_MEMORY
)
963 log_file_error(filename
, location
.first_line
, "unpacked array type `%s' cannot be used for a parameter\n", children
[1]->str
.c_str());
964 is_signed
= templ
->is_signed
;
965 is_string
= templ
->is_string
;
966 is_custom_type
= templ
->is_custom_type
;
968 range_valid
= templ
->range_valid
;
969 range_swapped
= templ
->range_swapped
;
970 range_left
= templ
->range_left
;
971 range_right
= templ
->range_right
;
972 attributes
["\\wiretype"] = mkconst_str(resolved_type
->str
);
973 for (auto template_child
: templ
->children
)
974 children
.push_back(template_child
->clone());
975 did_something
= true;
977 log_assert(!is_custom_type
);
980 // resolve constant prefixes
981 if (type
== AST_PREFIX
) {
982 if (children
[0]->type
!= AST_CONSTANT
) {
983 // dumpAst(NULL, "> ");
984 log_file_error(filename
, location
.first_line
, "Index in generate block prefix syntax is not constant!\n");
986 if (children
[1]->type
== AST_PREFIX
)
987 children
[1]->simplify(const_fold
, at_zero
, in_lvalue
, stage
, width_hint
, sign_hint
, in_param
);
988 log_assert(children
[1]->type
== AST_IDENTIFIER
);
989 newNode
= children
[1]->clone();
990 const char *second_part
= children
[1]->str
.c_str();
991 if (second_part
[0] == '\\')
993 newNode
->str
= stringf("%s[%d].%s", str
.c_str(), children
[0]->integer
, second_part
);
997 // evaluate TO_BITS nodes
998 if (type
== AST_TO_BITS
) {
999 if (children
[0]->type
!= AST_CONSTANT
)
1000 log_file_error(filename
, location
.first_line
, "Left operand of to_bits expression is not constant!\n");
1001 if (children
[1]->type
!= AST_CONSTANT
)
1002 log_file_error(filename
, location
.first_line
, "Right operand of to_bits expression is not constant!\n");
1003 RTLIL::Const new_value
= children
[1]->bitsAsConst(children
[0]->bitsAsConst().as_int(), children
[1]->is_signed
);
1004 newNode
= mkconst_bits(new_value
.bits
, children
[1]->is_signed
);
1008 // annotate constant ranges
1009 if (type
== AST_RANGE
) {
1010 bool old_range_valid
= range_valid
;
1011 range_valid
= false;
1012 range_swapped
= false;
1015 log_assert(children
.size() >= 1);
1016 if (children
[0]->type
== AST_CONSTANT
) {
1018 range_left
= children
[0]->integer
;
1019 if (children
.size() == 1)
1020 range_right
= range_left
;
1022 if (children
.size() >= 2) {
1023 if (children
[1]->type
== AST_CONSTANT
)
1024 range_right
= children
[1]->integer
;
1026 range_valid
= false;
1028 if (old_range_valid
!= range_valid
)
1029 did_something
= true;
1030 if (range_valid
&& range_left
>= 0 && range_right
> range_left
) {
1031 int tmp
= range_right
;
1032 range_right
= range_left
;
1034 range_swapped
= true;
1038 // annotate wires with their ranges
1039 if (type
== AST_WIRE
) {
1040 if (children
.size() > 0) {
1041 if (children
[0]->range_valid
) {
1043 did_something
= true;
1045 range_swapped
= children
[0]->range_swapped
;
1046 range_left
= children
[0]->range_left
;
1047 range_right
= children
[0]->range_right
;
1051 did_something
= true;
1053 range_swapped
= false;
1059 // resolve multiranges on memory decl
1060 if (type
== AST_MEMORY
&& children
.size() > 1 && children
[1]->type
== AST_MULTIRANGE
)
1063 multirange_dimensions
.clear();
1064 for (auto range
: children
[1]->children
) {
1065 if (!range
->range_valid
)
1066 log_file_error(filename
, location
.first_line
, "Non-constant range on memory decl.\n");
1067 multirange_dimensions
.push_back(min(range
->range_left
, range
->range_right
));
1068 multirange_dimensions
.push_back(max(range
->range_left
, range
->range_right
) - min(range
->range_left
, range
->range_right
) + 1);
1069 total_size
*= multirange_dimensions
.back();
1072 children
[1] = new AstNode(AST_RANGE
, AstNode::mkconst_int(0, true), AstNode::mkconst_int(total_size
-1, true));
1073 did_something
= true;
1076 // resolve multiranges on memory access
1077 if (type
== AST_IDENTIFIER
&& id2ast
&& id2ast
->type
== AST_MEMORY
&& children
.size() > 0 && children
[0]->type
== AST_MULTIRANGE
)
1079 AstNode
*index_expr
= nullptr;
1081 for (int i
= 0; 2*i
< GetSize(id2ast
->multirange_dimensions
); i
++)
1083 if (GetSize(children
[0]->children
) < i
)
1084 log_file_error(filename
, location
.first_line
, "Insufficient number of array indices for %s.\n", log_id(str
));
1086 AstNode
*new_index_expr
= children
[0]->children
[i
]->children
.at(0)->clone();
1088 if (id2ast
->multirange_dimensions
[2*i
])
1089 new_index_expr
= new AstNode(AST_SUB
, new_index_expr
, AstNode::mkconst_int(id2ast
->multirange_dimensions
[2*i
], true));
1092 index_expr
= new_index_expr
;
1094 index_expr
= new AstNode(AST_ADD
, new AstNode(AST_MUL
, index_expr
, AstNode::mkconst_int(id2ast
->multirange_dimensions
[2*i
+1], true)), new_index_expr
);
1097 for (int i
= GetSize(id2ast
->multirange_dimensions
)/2; i
< GetSize(children
[0]->children
); i
++)
1098 children
.push_back(children
[0]->children
[i
]->clone());
1101 if (index_expr
== nullptr)
1102 children
.erase(children
.begin());
1104 children
[0] = new AstNode(AST_RANGE
, index_expr
);
1106 did_something
= true;
1109 // trim/extend parameters
1110 if (type
== AST_PARAMETER
|| type
== AST_LOCALPARAM
|| type
== AST_ENUM_ITEM
) {
1111 if (children
.size() > 1 && children
[1]->type
== AST_RANGE
) {
1112 if (!children
[1]->range_valid
)
1113 log_file_error(filename
, location
.first_line
, "Non-constant width range on parameter decl.\n");
1114 int width
= std::abs(children
[1]->range_left
- children
[1]->range_right
) + 1;
1115 if (children
[0]->type
== AST_REALVALUE
) {
1116 RTLIL::Const constvalue
= children
[0]->realAsConst(width
);
1117 log_file_warning(filename
, location
.first_line
, "converting real value %e to binary %s.\n",
1118 children
[0]->realvalue
, log_signal(constvalue
));
1120 children
[0] = mkconst_bits(constvalue
.bits
, sign_hint
);
1121 did_something
= true;
1123 if (children
[0]->type
== AST_CONSTANT
) {
1124 if (width
!= int(children
[0]->bits
.size())) {
1125 RTLIL::SigSpec
sig(children
[0]->bits
);
1126 sig
.extend_u0(width
, children
[0]->is_signed
);
1127 AstNode
*old_child_0
= children
[0];
1128 children
[0] = mkconst_bits(sig
.as_const().bits
, is_signed
);
1131 children
[0]->is_signed
= is_signed
;
1134 range_swapped
= children
[1]->range_swapped
;
1135 range_left
= children
[1]->range_left
;
1136 range_right
= children
[1]->range_right
;
1138 if (children
.size() > 1 && children
[1]->type
== AST_REALVALUE
&& children
[0]->type
== AST_CONSTANT
) {
1139 double as_realvalue
= children
[0]->asReal(sign_hint
);
1141 children
[0] = new AstNode(AST_REALVALUE
);
1142 children
[0]->realvalue
= as_realvalue
;
1143 did_something
= true;
1147 // annotate identifiers using scope resolution and create auto-wires as needed
1148 if (type
== AST_IDENTIFIER
) {
1149 if (current_scope
.count(str
) == 0) {
1150 for (auto node
: current_ast_mod
->children
) {
1151 //log("looking at mod scope child %s\n", type2str(node->type).c_str());
1152 switch (node
->type
) {
1154 case AST_LOCALPARAM
:
1161 case AST_DPI_FUNCTION
:
1162 //log("found child %s, %s\n", type2str(node->type).c_str(), node->str.c_str());
1163 if (str
== node
->str
) {
1164 //log("add %s, type %s to scope\n", str.c_str(), type2str(node->type).c_str());
1165 current_scope
[node
->str
] = node
;
1169 current_scope
[node
->str
] = node
;
1170 for (auto enum_node
: node
->children
) {
1171 log_assert(enum_node
->type
==AST_ENUM_ITEM
);
1172 if (str
== enum_node
->str
) {
1173 //log("\nadding enum item %s to scope\n", str.c_str());
1174 current_scope
[str
] = enum_node
;
1183 if (current_scope
.count(str
) == 0) {
1184 if (flag_autowire
|| str
== "\\$global_clock") {
1185 AstNode
*auto_wire
= new AstNode(AST_AUTOWIRE
);
1186 auto_wire
->str
= str
;
1187 current_ast_mod
->children
.push_back(auto_wire
);
1188 current_scope
[str
] = auto_wire
;
1189 did_something
= true;
1191 log_file_error(filename
, location
.first_line
, "Identifier `%s' is implicitly declared and `default_nettype is set to none.\n", str
.c_str());
1194 if (id2ast
!= current_scope
[str
]) {
1195 id2ast
= current_scope
[str
];
1196 did_something
= true;
1200 // split memory access with bit select to individual statements
1201 if (type
== AST_IDENTIFIER
&& children
.size() == 2 && children
[0]->type
== AST_RANGE
&& children
[1]->type
== AST_RANGE
&& !in_lvalue
)
1203 if (id2ast
== NULL
|| id2ast
->type
!= AST_MEMORY
|| children
[0]->children
.size() != 1)
1204 log_file_error(filename
, location
.first_line
, "Invalid bit-select on memory access!\n");
1206 int mem_width
, mem_size
, addr_bits
;
1207 id2ast
->meminfo(mem_width
, mem_size
, addr_bits
);
1209 int data_range_left
= id2ast
->children
[0]->range_left
;
1210 int data_range_right
= id2ast
->children
[0]->range_right
;
1212 if (id2ast
->children
[0]->range_swapped
)
1213 std::swap(data_range_left
, data_range_right
);
1215 std::stringstream sstr
;
1216 sstr
<< "$mem2bits$" << str
<< "$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
1217 std::string wire_id
= sstr
.str();
1219 AstNode
*wire
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(data_range_left
, true), mkconst_int(data_range_right
, true)));
1220 wire
->str
= wire_id
;
1222 wire
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
1223 current_ast_mod
->children
.push_back(wire
);
1224 while (wire
->simplify(true, false, false, 1, -1, false, false)) { }
1226 AstNode
*data
= clone();
1227 delete data
->children
[1];
1228 data
->children
.pop_back();
1230 AstNode
*assign
= new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
), data
);
1231 assign
->children
[0]->str
= wire_id
;
1232 assign
->children
[0]->was_checked
= true;
1236 size_t assign_idx
= 0;
1237 while (assign_idx
< current_block
->children
.size() && current_block
->children
[assign_idx
] != current_block_child
)
1239 log_assert(assign_idx
< current_block
->children
.size());
1240 current_block
->children
.insert(current_block
->children
.begin()+assign_idx
, assign
);
1241 wire
->is_reg
= true;
1245 AstNode
*proc
= new AstNode(AST_ALWAYS
, new AstNode(AST_BLOCK
));
1246 proc
->children
[0]->children
.push_back(assign
);
1247 current_ast_mod
->children
.push_back(proc
);
1250 newNode
= new AstNode(AST_IDENTIFIER
, children
[1]->clone());
1251 newNode
->str
= wire_id
;
1252 newNode
->id2ast
= wire
;
1256 if (type
== AST_WHILE
)
1257 log_file_error(filename
, location
.first_line
, "While loops are only allowed in constant functions!\n");
1259 if (type
== AST_REPEAT
)
1261 AstNode
*count
= children
[0];
1262 AstNode
*body
= children
[1];
1264 // eval count expression
1265 while (count
->simplify(true, false, false, stage
, 32, true, false)) { }
1267 if (count
->type
!= AST_CONSTANT
)
1268 log_file_error(filename
, location
.first_line
, "Repeat loops outside must have constant repeat counts!\n");
1270 // convert to a block with the body repeated n times
1273 for (int i
= 0; i
< count
->bitsAsConst().as_int(); i
++)
1274 children
.insert(children
.begin(), body
->clone());
1278 did_something
= true;
1281 // unroll for loops and generate-for blocks
1282 if ((type
== AST_GENFOR
|| type
== AST_FOR
) && children
.size() != 0)
1284 AstNode
*init_ast
= children
[0];
1285 AstNode
*while_ast
= children
[1];
1286 AstNode
*next_ast
= children
[2];
1287 AstNode
*body_ast
= children
[3];
1289 while (body_ast
->type
== AST_GENBLOCK
&& body_ast
->str
.empty() &&
1290 body_ast
->children
.size() == 1 && body_ast
->children
.at(0)->type
== AST_GENBLOCK
)
1291 body_ast
= body_ast
->children
.at(0);
1293 if (init_ast
->type
!= AST_ASSIGN_EQ
)
1294 log_file_error(filename
, location
.first_line
, "Unsupported 1st expression of generate for-loop!\n");
1295 if (next_ast
->type
!= AST_ASSIGN_EQ
)
1296 log_file_error(filename
, location
.first_line
, "Unsupported 3rd expression of generate for-loop!\n");
1298 if (type
== AST_GENFOR
) {
1299 if (init_ast
->children
[0]->id2ast
== NULL
|| init_ast
->children
[0]->id2ast
->type
!= AST_GENVAR
)
1300 log_file_error(filename
, location
.first_line
, "Left hand side of 1st expression of generate for-loop is not a gen var!\n");
1301 if (next_ast
->children
[0]->id2ast
== NULL
|| next_ast
->children
[0]->id2ast
->type
!= AST_GENVAR
)
1302 log_file_error(filename
, location
.first_line
, "Left hand side of 3rd expression of generate for-loop is not a gen var!\n");
1304 if (init_ast
->children
[0]->id2ast
== NULL
|| init_ast
->children
[0]->id2ast
->type
!= AST_WIRE
)
1305 log_file_error(filename
, location
.first_line
, "Left hand side of 1st expression of generate for-loop is not a register!\n");
1306 if (next_ast
->children
[0]->id2ast
== NULL
|| next_ast
->children
[0]->id2ast
->type
!= AST_WIRE
)
1307 log_file_error(filename
, location
.first_line
, "Left hand side of 3rd expression of generate for-loop is not a register!\n");
1310 if (init_ast
->children
[0]->id2ast
!= next_ast
->children
[0]->id2ast
)
1311 log_file_error(filename
, location
.first_line
, "Incompatible left-hand sides in 1st and 3rd expression of generate for-loop!\n");
1313 // eval 1st expression
1314 AstNode
*varbuf
= init_ast
->children
[1]->clone();
1316 int expr_width_hint
= -1;
1317 bool expr_sign_hint
= true;
1318 varbuf
->detectSignWidth(expr_width_hint
, expr_sign_hint
);
1319 while (varbuf
->simplify(true, false, false, stage
, 32, true, false)) { }
1322 if (varbuf
->type
!= AST_CONSTANT
)
1323 log_file_error(filename
, location
.first_line
, "Right hand side of 1st expression of generate for-loop is not constant!\n");
1325 auto resolved
= current_scope
.at(init_ast
->children
[0]->str
);
1326 if (resolved
->range_valid
) {
1327 int const_size
= varbuf
->range_left
- varbuf
->range_right
;
1328 int resolved_size
= resolved
->range_left
- resolved
->range_right
;
1329 if (const_size
< resolved_size
) {
1330 for (int i
= const_size
; i
< resolved_size
; i
++)
1331 varbuf
->bits
.push_back(resolved
->is_signed
? varbuf
->bits
.back() : State::S0
);
1332 varbuf
->range_left
= resolved
->range_left
;
1333 varbuf
->range_right
= resolved
->range_right
;
1334 varbuf
->range_swapped
= resolved
->range_swapped
;
1335 varbuf
->range_valid
= resolved
->range_valid
;
1339 varbuf
= new AstNode(AST_LOCALPARAM
, varbuf
);
1340 varbuf
->str
= init_ast
->children
[0]->str
;
1342 AstNode
*backup_scope_varbuf
= current_scope
[varbuf
->str
];
1343 current_scope
[varbuf
->str
] = varbuf
;
1345 size_t current_block_idx
= 0;
1346 if (type
== AST_FOR
) {
1347 while (current_block_idx
< current_block
->children
.size() &&
1348 current_block
->children
[current_block_idx
] != current_block_child
)
1349 current_block_idx
++;
1354 // eval 2nd expression
1355 AstNode
*buf
= while_ast
->clone();
1357 int expr_width_hint
= -1;
1358 bool expr_sign_hint
= true;
1359 buf
->detectSignWidth(expr_width_hint
, expr_sign_hint
);
1360 while (buf
->simplify(true, false, false, stage
, expr_width_hint
, expr_sign_hint
, false)) { }
1363 if (buf
->type
!= AST_CONSTANT
)
1364 log_file_error(filename
, location
.first_line
, "2nd expression of generate for-loop is not constant!\n");
1366 if (buf
->integer
== 0) {
1373 int index
= varbuf
->children
[0]->integer
;
1374 if (body_ast
->type
== AST_GENBLOCK
)
1375 buf
= body_ast
->clone();
1377 buf
= new AstNode(AST_GENBLOCK
, body_ast
->clone());
1378 if (buf
->str
.empty()) {
1379 std::stringstream sstr
;
1380 sstr
<< "$genblock$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
1381 buf
->str
= sstr
.str();
1383 std::map
<std::string
, std::string
> name_map
;
1384 std::stringstream sstr
;
1385 sstr
<< buf
->str
<< "[" << index
<< "].";
1386 buf
->expand_genblock(varbuf
->str
, sstr
.str(), name_map
);
1388 if (type
== AST_GENFOR
) {
1389 for (size_t i
= 0; i
< buf
->children
.size(); i
++) {
1390 buf
->children
[i
]->simplify(false, false, false, stage
, -1, false, false);
1391 current_ast_mod
->children
.push_back(buf
->children
[i
]);
1394 for (size_t i
= 0; i
< buf
->children
.size(); i
++)
1395 current_block
->children
.insert(current_block
->children
.begin() + current_block_idx
++, buf
->children
[i
]);
1397 buf
->children
.clear();
1400 // eval 3rd expression
1401 buf
= next_ast
->children
[1]->clone();
1403 int expr_width_hint
= -1;
1404 bool expr_sign_hint
= true;
1405 buf
->detectSignWidth(expr_width_hint
, expr_sign_hint
);
1406 while (buf
->simplify(true, false, false, stage
, expr_width_hint
, expr_sign_hint
, true)) { }
1409 if (buf
->type
!= AST_CONSTANT
)
1410 log_file_error(filename
, location
.first_line
, "Right hand side of 3rd expression of generate for-loop is not constant (%s)!\n", type2str(buf
->type
).c_str());
1412 delete varbuf
->children
[0];
1413 varbuf
->children
[0] = buf
;
1416 if (type
== AST_FOR
) {
1417 AstNode
*buf
= next_ast
->clone();
1418 delete buf
->children
[1];
1419 buf
->children
[1] = varbuf
->children
[0]->clone();
1420 current_block
->children
.insert(current_block
->children
.begin() + current_block_idx
++, buf
);
1423 current_scope
[varbuf
->str
] = backup_scope_varbuf
;
1426 did_something
= true;
1429 // check for local objects in unnamed block
1430 if (type
== AST_BLOCK
&& str
.empty())
1432 for (size_t i
= 0; i
< children
.size(); i
++)
1433 if (children
[i
]->type
== AST_WIRE
|| children
[i
]->type
== AST_MEMORY
|| children
[i
]->type
== AST_PARAMETER
|| children
[i
]->type
== AST_LOCALPARAM
|| children
[i
]->type
== AST_TYPEDEF
)
1434 log_file_error(children
[i
]->filename
, children
[i
]->location
.first_line
, "Local declaration in unnamed block is an unsupported SystemVerilog feature!\n");
1437 // transform block with name
1438 if (type
== AST_BLOCK
&& !str
.empty())
1440 std::map
<std::string
, std::string
> name_map
;
1441 expand_genblock(std::string(), str
+ ".", name_map
);
1443 std::vector
<AstNode
*> new_children
;
1444 for (size_t i
= 0; i
< children
.size(); i
++)
1445 if (children
[i
]->type
== AST_WIRE
|| children
[i
]->type
== AST_MEMORY
|| children
[i
]->type
== AST_PARAMETER
|| children
[i
]->type
== AST_LOCALPARAM
|| children
[i
]->type
== AST_TYPEDEF
) {
1446 children
[i
]->simplify(false, false, false, stage
, -1, false, false);
1447 current_ast_mod
->children
.push_back(children
[i
]);
1448 current_scope
[children
[i
]->str
] = children
[i
];
1450 new_children
.push_back(children
[i
]);
1452 children
.swap(new_children
);
1453 did_something
= true;
1457 // simplify unconditional generate block
1458 if (type
== AST_GENBLOCK
&& children
.size() != 0)
1461 std::map
<std::string
, std::string
> name_map
;
1462 expand_genblock(std::string(), str
+ ".", name_map
);
1465 for (size_t i
= 0; i
< children
.size(); i
++) {
1466 children
[i
]->simplify(false, false, false, stage
, -1, false, false);
1467 current_ast_mod
->children
.push_back(children
[i
]);
1471 did_something
= true;
1474 // simplify generate-if blocks
1475 if (type
== AST_GENIF
&& children
.size() != 0)
1477 AstNode
*buf
= children
[0]->clone();
1478 while (buf
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
1479 if (buf
->type
!= AST_CONSTANT
) {
1480 // for (auto f : log_files)
1481 // dumpAst(f, "verilog-ast> ");
1482 log_file_error(filename
, location
.first_line
, "Condition for generate if is not constant!\n");
1484 if (buf
->asBool() != 0) {
1486 buf
= children
[1]->clone();
1489 buf
= children
.size() > 2 ? children
[2]->clone() : NULL
;
1494 if (buf
->type
!= AST_GENBLOCK
)
1495 buf
= new AstNode(AST_GENBLOCK
, buf
);
1497 if (!buf
->str
.empty()) {
1498 std::map
<std::string
, std::string
> name_map
;
1499 buf
->expand_genblock(std::string(), buf
->str
+ ".", name_map
);
1502 for (size_t i
= 0; i
< buf
->children
.size(); i
++) {
1503 buf
->children
[i
]->simplify(false, false, false, stage
, -1, false, false);
1504 current_ast_mod
->children
.push_back(buf
->children
[i
]);
1507 buf
->children
.clear();
1512 did_something
= true;
1515 // simplify generate-case blocks
1516 if (type
== AST_GENCASE
&& children
.size() != 0)
1518 AstNode
*buf
= children
[0]->clone();
1519 while (buf
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
1520 if (buf
->type
!= AST_CONSTANT
) {
1521 // for (auto f : log_files)
1522 // dumpAst(f, "verilog-ast> ");
1523 log_file_error(filename
, location
.first_line
, "Condition for generate case is not constant!\n");
1526 bool ref_signed
= buf
->is_signed
;
1527 RTLIL::Const ref_value
= buf
->bitsAsConst();
1530 AstNode
*selected_case
= NULL
;
1531 for (size_t i
= 1; i
< children
.size(); i
++)
1533 log_assert(children
.at(i
)->type
== AST_COND
|| children
.at(i
)->type
== AST_CONDX
|| children
.at(i
)->type
== AST_CONDZ
);
1535 AstNode
*this_genblock
= NULL
;
1536 for (auto child
: children
.at(i
)->children
) {
1537 log_assert(this_genblock
== NULL
);
1538 if (child
->type
== AST_GENBLOCK
)
1539 this_genblock
= child
;
1542 for (auto child
: children
.at(i
)->children
)
1544 if (child
->type
== AST_DEFAULT
) {
1545 if (selected_case
== NULL
)
1546 selected_case
= this_genblock
;
1549 if (child
->type
== AST_GENBLOCK
)
1552 buf
= child
->clone();
1553 while (buf
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
1554 if (buf
->type
!= AST_CONSTANT
) {
1555 // for (auto f : log_files)
1556 // dumpAst(f, "verilog-ast> ");
1557 log_file_error(filename
, location
.first_line
, "Expression in generate case is not constant!\n");
1560 bool is_selected
= RTLIL::const_eq(ref_value
, buf
->bitsAsConst(), ref_signed
&& buf
->is_signed
, ref_signed
&& buf
->is_signed
, 1).as_bool();
1564 selected_case
= this_genblock
;
1565 i
= children
.size();
1571 if (selected_case
!= NULL
)
1573 log_assert(selected_case
->type
== AST_GENBLOCK
);
1574 buf
= selected_case
->clone();
1576 if (!buf
->str
.empty()) {
1577 std::map
<std::string
, std::string
> name_map
;
1578 buf
->expand_genblock(std::string(), buf
->str
+ ".", name_map
);
1581 for (size_t i
= 0; i
< buf
->children
.size(); i
++) {
1582 buf
->children
[i
]->simplify(false, false, false, stage
, -1, false, false);
1583 current_ast_mod
->children
.push_back(buf
->children
[i
]);
1586 buf
->children
.clear();
1591 did_something
= true;
1594 // unroll cell arrays
1595 if (type
== AST_CELLARRAY
)
1597 if (!children
.at(0)->range_valid
)
1598 log_file_error(filename
, location
.first_line
, "Non-constant array range on cell array.\n");
1600 newNode
= new AstNode(AST_GENBLOCK
);
1601 int num
= max(children
.at(0)->range_left
, children
.at(0)->range_right
) - min(children
.at(0)->range_left
, children
.at(0)->range_right
) + 1;
1603 for (int i
= 0; i
< num
; i
++) {
1604 int idx
= children
.at(0)->range_left
> children
.at(0)->range_right
? children
.at(0)->range_right
+ i
: children
.at(0)->range_right
- i
;
1605 AstNode
*new_cell
= children
.at(1)->clone();
1606 newNode
->children
.push_back(new_cell
);
1607 new_cell
->str
+= stringf("[%d]", idx
);
1608 if (new_cell
->type
== AST_PRIMITIVE
) {
1609 log_file_error(filename
, location
.first_line
, "Cell arrays of primitives are currently not supported.\n");
1611 log_assert(new_cell
->children
.at(0)->type
== AST_CELLTYPE
);
1612 new_cell
->children
.at(0)->str
= stringf("$array:%d:%d:%s", i
, num
, new_cell
->children
.at(0)->str
.c_str());
1619 // replace primitives with assignments
1620 if (type
== AST_PRIMITIVE
)
1622 if (children
.size() < 2)
1623 log_file_error(filename
, location
.first_line
, "Insufficient number of arguments for primitive `%s'!\n", str
.c_str());
1625 std::vector
<AstNode
*> children_list
;
1626 for (auto child
: children
) {
1627 log_assert(child
->type
== AST_ARGUMENT
);
1628 log_assert(child
->children
.size() == 1);
1629 children_list
.push_back(child
->children
[0]);
1630 child
->children
.clear();
1635 if (str
== "bufif0" || str
== "bufif1" || str
== "notif0" || str
== "notif1")
1637 if (children_list
.size() != 3)
1638 log_file_error(filename
, location
.first_line
, "Invalid number of arguments for primitive `%s'!\n", str
.c_str());
1640 std::vector
<RTLIL::State
> z_const(1, RTLIL::State::Sz
);
1642 AstNode
*mux_input
= children_list
.at(1);
1643 if (str
== "notif0" || str
== "notif1") {
1644 mux_input
= new AstNode(AST_BIT_NOT
, mux_input
);
1646 AstNode
*node
= new AstNode(AST_TERNARY
, children_list
.at(2));
1647 if (str
== "bufif0") {
1648 node
->children
.push_back(AstNode::mkconst_bits(z_const
, false));
1649 node
->children
.push_back(mux_input
);
1651 node
->children
.push_back(mux_input
);
1652 node
->children
.push_back(AstNode::mkconst_bits(z_const
, false));
1657 children
.push_back(children_list
.at(0));
1658 children
.back()->was_checked
= true;
1659 children
.push_back(node
);
1660 did_something
= true;
1664 AstNodeType op_type
= AST_NONE
;
1665 bool invert_results
= false;
1668 op_type
= AST_BIT_AND
;
1670 op_type
= AST_BIT_AND
, invert_results
= true;
1672 op_type
= AST_BIT_OR
;
1674 op_type
= AST_BIT_OR
, invert_results
= true;
1676 op_type
= AST_BIT_XOR
;
1678 op_type
= AST_BIT_XOR
, invert_results
= true;
1682 op_type
= AST_POS
, invert_results
= true;
1683 log_assert(op_type
!= AST_NONE
);
1685 AstNode
*node
= children_list
[1];
1686 if (op_type
!= AST_POS
)
1687 for (size_t i
= 2; i
< children_list
.size(); i
++)
1688 node
= new AstNode(op_type
, node
, children_list
[i
]);
1690 node
= new AstNode(AST_BIT_NOT
, node
);
1694 children
.push_back(children_list
[0]);
1695 children
.back()->was_checked
= true;
1696 children
.push_back(node
);
1697 did_something
= true;
1701 // replace dynamic ranges in left-hand side expressions (e.g. "foo[bar] <= 1'b1;") with
1702 // a big case block that selects the correct single-bit assignment.
1703 if (type
== AST_ASSIGN_EQ
|| type
== AST_ASSIGN_LE
) {
1704 if (children
[0]->type
!= AST_IDENTIFIER
|| children
[0]->children
.size() == 0)
1705 goto skip_dynamic_range_lvalue_expansion
;
1706 if (children
[0]->children
[0]->range_valid
|| did_something
)
1707 goto skip_dynamic_range_lvalue_expansion
;
1708 if (children
[0]->id2ast
== NULL
|| children
[0]->id2ast
->type
!= AST_WIRE
)
1709 goto skip_dynamic_range_lvalue_expansion
;
1710 if (!children
[0]->id2ast
->range_valid
)
1711 goto skip_dynamic_range_lvalue_expansion
;
1712 int source_width
= children
[0]->id2ast
->range_left
- children
[0]->id2ast
->range_right
+ 1;
1713 int result_width
= 1;
1714 AstNode
*shift_expr
= NULL
;
1715 AstNode
*range
= children
[0]->children
[0];
1716 if (range
->children
.size() == 1) {
1717 shift_expr
= range
->children
[0]->clone();
1719 shift_expr
= range
->children
[1]->clone();
1720 AstNode
*left_at_zero_ast
= range
->children
[0]->clone();
1721 AstNode
*right_at_zero_ast
= range
->children
[1]->clone();
1722 while (left_at_zero_ast
->simplify(true, true, false, stage
, -1, false, false)) { }
1723 while (right_at_zero_ast
->simplify(true, true, false, stage
, -1, false, false)) { }
1724 if (left_at_zero_ast
->type
!= AST_CONSTANT
|| right_at_zero_ast
->type
!= AST_CONSTANT
)
1725 log_file_error(filename
, location
.first_line
, "Unsupported expression on dynamic range select on signal `%s'!\n", str
.c_str());
1726 result_width
= abs(int(left_at_zero_ast
->integer
- right_at_zero_ast
->integer
)) + 1;
1728 did_something
= true;
1729 newNode
= new AstNode(AST_CASE
, shift_expr
);
1730 for (int i
= 0; i
<= source_width
-result_width
; i
++) {
1731 int start_bit
= children
[0]->id2ast
->range_right
+ i
;
1732 AstNode
*cond
= new AstNode(AST_COND
, mkconst_int(start_bit
, true));
1733 AstNode
*lvalue
= children
[0]->clone();
1734 lvalue
->delete_children();
1735 lvalue
->children
.push_back(new AstNode(AST_RANGE
,
1736 mkconst_int(start_bit
+result_width
-1, true), mkconst_int(start_bit
, true)));
1737 cond
->children
.push_back(new AstNode(AST_BLOCK
, new AstNode(type
, lvalue
, children
[1]->clone())));
1738 newNode
->children
.push_back(cond
);
1742 skip_dynamic_range_lvalue_expansion
:;
1744 if (stage
> 1 && (type
== AST_ASSERT
|| type
== AST_ASSUME
|| type
== AST_LIVE
|| type
== AST_FAIR
|| type
== AST_COVER
) && current_block
!= NULL
)
1746 std::stringstream sstr
;
1747 sstr
<< "$formal$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
1748 std::string id_check
= sstr
.str() + "_CHECK", id_en
= sstr
.str() + "_EN";
1750 AstNode
*wire_check
= new AstNode(AST_WIRE
);
1751 wire_check
->str
= id_check
;
1752 wire_check
->was_checked
= true;
1753 current_ast_mod
->children
.push_back(wire_check
);
1754 current_scope
[wire_check
->str
] = wire_check
;
1755 while (wire_check
->simplify(true, false, false, 1, -1, false, false)) { }
1757 AstNode
*wire_en
= new AstNode(AST_WIRE
);
1758 wire_en
->str
= id_en
;
1759 wire_en
->was_checked
= true;
1760 current_ast_mod
->children
.push_back(wire_en
);
1761 if (current_always_clocked
) {
1762 current_ast_mod
->children
.push_back(new AstNode(AST_INITIAL
, new AstNode(AST_BLOCK
, new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), AstNode::mkconst_int(0, false, 1)))));
1763 current_ast_mod
->children
.back()->children
[0]->children
[0]->children
[0]->str
= id_en
;
1764 current_ast_mod
->children
.back()->children
[0]->children
[0]->children
[0]->was_checked
= true;
1766 current_scope
[wire_en
->str
] = wire_en
;
1767 while (wire_en
->simplify(true, false, false, 1, -1, false, false)) { }
1769 AstNode
*check_defval
;
1770 if (type
== AST_LIVE
|| type
== AST_FAIR
) {
1771 check_defval
= new AstNode(AST_REDUCE_BOOL
, children
[0]->clone());
1773 std::vector
<RTLIL::State
> x_bit
;
1774 x_bit
.push_back(RTLIL::State::Sx
);
1775 check_defval
= mkconst_bits(x_bit
, false);
1778 AstNode
*assign_check
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), check_defval
);
1779 assign_check
->children
[0]->str
= id_check
;
1780 assign_check
->children
[0]->was_checked
= true;
1782 AstNode
*assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_int(0, false, 1));
1783 assign_en
->children
[0]->str
= id_en
;
1784 assign_en
->children
[0]->was_checked
= true;
1786 AstNode
*default_signals
= new AstNode(AST_BLOCK
);
1787 default_signals
->children
.push_back(assign_check
);
1788 default_signals
->children
.push_back(assign_en
);
1789 current_top_block
->children
.insert(current_top_block
->children
.begin(), default_signals
);
1791 if (type
== AST_LIVE
|| type
== AST_FAIR
) {
1792 assign_check
= nullptr;
1794 assign_check
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), new AstNode(AST_REDUCE_BOOL
, children
[0]->clone()));
1795 assign_check
->children
[0]->str
= id_check
;
1796 assign_check
->children
[0]->was_checked
= true;
1799 if (current_always
== nullptr || current_always
->type
!= AST_INITIAL
) {
1800 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_int(1, false, 1));
1802 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), new AstNode(AST_FCALL
));
1803 assign_en
->children
[1]->str
= "\\$initstate";
1805 assign_en
->children
[0]->str
= id_en
;
1806 assign_en
->children
[0]->was_checked
= true;
1808 newNode
= new AstNode(AST_BLOCK
);
1809 if (assign_check
!= nullptr)
1810 newNode
->children
.push_back(assign_check
);
1811 newNode
->children
.push_back(assign_en
);
1813 AstNode
*assertnode
= new AstNode(type
);
1814 assertnode
->location
= location
;
1815 assertnode
->str
= str
;
1816 assertnode
->children
.push_back(new AstNode(AST_IDENTIFIER
));
1817 assertnode
->children
.push_back(new AstNode(AST_IDENTIFIER
));
1818 assertnode
->children
[0]->str
= id_check
;
1819 assertnode
->children
[1]->str
= id_en
;
1820 assertnode
->attributes
.swap(attributes
);
1821 current_ast_mod
->children
.push_back(assertnode
);
1826 if (stage
> 1 && (type
== AST_ASSERT
|| type
== AST_ASSUME
|| type
== AST_LIVE
|| type
== AST_FAIR
|| type
== AST_COVER
) && children
.size() == 1)
1828 children
.push_back(mkconst_int(1, false, 1));
1829 did_something
= true;
1832 // found right-hand side identifier for memory -> replace with memory read port
1833 if (stage
> 1 && type
== AST_IDENTIFIER
&& id2ast
!= NULL
&& id2ast
->type
== AST_MEMORY
&& !in_lvalue
&&
1834 children
.size() == 1 && children
[0]->type
== AST_RANGE
&& children
[0]->children
.size() == 1) {
1835 newNode
= new AstNode(AST_MEMRD
, children
[0]->children
[0]->clone());
1837 newNode
->id2ast
= id2ast
;
1841 // assignment with nontrivial member in left-hand concat expression -> split assignment
1842 if ((type
== AST_ASSIGN_EQ
|| type
== AST_ASSIGN_LE
) && children
[0]->type
== AST_CONCAT
&& width_hint
> 0)
1844 bool found_nontrivial_member
= false;
1846 for (auto child
: children
[0]->children
) {
1847 if (child
->type
== AST_IDENTIFIER
&& child
->id2ast
!= NULL
&& child
->id2ast
->type
== AST_MEMORY
)
1848 found_nontrivial_member
= true;
1851 if (found_nontrivial_member
)
1853 newNode
= new AstNode(AST_BLOCK
);
1855 AstNode
*wire_tmp
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(width_hint
-1, true), mkconst_int(0, true)));
1856 wire_tmp
->str
= stringf("$splitcmplxassign$%s:%d$%d", filename
.c_str(), location
.first_line
, autoidx
++);
1857 current_ast_mod
->children
.push_back(wire_tmp
);
1858 current_scope
[wire_tmp
->str
] = wire_tmp
;
1859 wire_tmp
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
1860 while (wire_tmp
->simplify(true, false, false, 1, -1, false, false)) { }
1861 wire_tmp
->is_logic
= true;
1863 AstNode
*wire_tmp_id
= new AstNode(AST_IDENTIFIER
);
1864 wire_tmp_id
->str
= wire_tmp
->str
;
1866 newNode
->children
.push_back(new AstNode(AST_ASSIGN_EQ
, wire_tmp_id
, children
[1]->clone()));
1867 newNode
->children
.back()->was_checked
= true;
1870 for (auto child
: children
[0]->children
)
1872 int child_width_hint
= -1;
1873 bool child_sign_hint
= true;
1874 child
->detectSignWidth(child_width_hint
, child_sign_hint
);
1876 AstNode
*rhs
= wire_tmp_id
->clone();
1877 rhs
->children
.push_back(new AstNode(AST_RANGE
, AstNode::mkconst_int(cursor
+child_width_hint
-1, true), AstNode::mkconst_int(cursor
, true)));
1878 newNode
->children
.push_back(new AstNode(type
, child
->clone(), rhs
));
1880 cursor
+= child_width_hint
;
1887 // assignment with memory in left-hand side expression -> replace with memory write port
1888 if (stage
> 1 && (type
== AST_ASSIGN_EQ
|| type
== AST_ASSIGN_LE
) && children
[0]->type
== AST_IDENTIFIER
&&
1889 children
[0]->id2ast
&& children
[0]->id2ast
->type
== AST_MEMORY
&& children
[0]->id2ast
->children
.size() >= 2 &&
1890 children
[0]->id2ast
->children
[0]->range_valid
&& children
[0]->id2ast
->children
[1]->range_valid
&&
1891 (children
[0]->children
.size() == 1 || children
[0]->children
.size() == 2) && children
[0]->children
[0]->type
== AST_RANGE
)
1893 std::stringstream sstr
;
1894 sstr
<< "$memwr$" << children
[0]->str
<< "$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
1895 std::string id_addr
= sstr
.str() + "_ADDR", id_data
= sstr
.str() + "_DATA", id_en
= sstr
.str() + "_EN";
1897 int mem_width
, mem_size
, addr_bits
;
1898 bool mem_signed
= children
[0]->id2ast
->is_signed
;
1899 children
[0]->id2ast
->meminfo(mem_width
, mem_size
, addr_bits
);
1901 int data_range_left
= children
[0]->id2ast
->children
[0]->range_left
;
1902 int data_range_right
= children
[0]->id2ast
->children
[0]->range_right
;
1903 int mem_data_range_offset
= std::min(data_range_left
, data_range_right
);
1905 int addr_width_hint
= -1;
1906 bool addr_sign_hint
= true;
1907 children
[0]->children
[0]->children
[0]->detectSignWidthWorker(addr_width_hint
, addr_sign_hint
);
1908 addr_bits
= std::max(addr_bits
, addr_width_hint
);
1910 AstNode
*wire_addr
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(addr_bits
-1, true), mkconst_int(0, true)));
1911 wire_addr
->str
= id_addr
;
1912 wire_addr
->was_checked
= true;
1913 current_ast_mod
->children
.push_back(wire_addr
);
1914 current_scope
[wire_addr
->str
] = wire_addr
;
1915 while (wire_addr
->simplify(true, false, false, 1, -1, false, false)) { }
1917 AstNode
*wire_data
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(mem_width
-1, true), mkconst_int(0, true)));
1918 wire_data
->str
= id_data
;
1919 wire_data
->was_checked
= true;
1920 wire_data
->is_signed
= mem_signed
;
1921 current_ast_mod
->children
.push_back(wire_data
);
1922 current_scope
[wire_data
->str
] = wire_data
;
1923 while (wire_data
->simplify(true, false, false, 1, -1, false, false)) { }
1925 AstNode
*wire_en
= nullptr;
1926 if (current_always
->type
!= AST_INITIAL
) {
1927 wire_en
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(mem_width
-1, true), mkconst_int(0, true)));
1928 wire_en
->str
= id_en
;
1929 wire_en
->was_checked
= true;
1930 current_ast_mod
->children
.push_back(wire_en
);
1931 current_scope
[wire_en
->str
] = wire_en
;
1932 while (wire_en
->simplify(true, false, false, 1, -1, false, false)) { }
1935 std::vector
<RTLIL::State
> x_bits_addr
, x_bits_data
, set_bits_en
;
1936 for (int i
= 0; i
< addr_bits
; i
++)
1937 x_bits_addr
.push_back(RTLIL::State::Sx
);
1938 for (int i
= 0; i
< mem_width
; i
++)
1939 x_bits_data
.push_back(RTLIL::State::Sx
);
1940 for (int i
= 0; i
< mem_width
; i
++)
1941 set_bits_en
.push_back(RTLIL::State::S1
);
1943 AstNode
*assign_addr
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_bits(x_bits_addr
, false));
1944 assign_addr
->children
[0]->str
= id_addr
;
1945 assign_addr
->children
[0]->was_checked
= true;
1947 AstNode
*assign_data
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_bits(x_bits_data
, false));
1948 assign_data
->children
[0]->str
= id_data
;
1949 assign_data
->children
[0]->was_checked
= true;
1951 AstNode
*assign_en
= nullptr;
1952 if (current_always
->type
!= AST_INITIAL
) {
1953 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_int(0, false, mem_width
));
1954 assign_en
->children
[0]->str
= id_en
;
1955 assign_en
->children
[0]->was_checked
= true;
1958 AstNode
*default_signals
= new AstNode(AST_BLOCK
);
1959 default_signals
->children
.push_back(assign_addr
);
1960 default_signals
->children
.push_back(assign_data
);
1961 if (current_always
->type
!= AST_INITIAL
)
1962 default_signals
->children
.push_back(assign_en
);
1963 current_top_block
->children
.insert(current_top_block
->children
.begin(), default_signals
);
1965 assign_addr
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), children
[0]->children
[0]->children
[0]->clone());
1966 assign_addr
->children
[0]->str
= id_addr
;
1967 assign_addr
->children
[0]->was_checked
= true;
1969 if (children
[0]->children
.size() == 2)
1971 if (children
[0]->children
[1]->range_valid
)
1973 int offset
= children
[0]->children
[1]->range_right
;
1974 int width
= children
[0]->children
[1]->range_left
- offset
+ 1;
1975 offset
-= mem_data_range_offset
;
1977 std::vector
<RTLIL::State
> padding_x(offset
, RTLIL::State::Sx
);
1979 assign_data
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
),
1980 new AstNode(AST_CONCAT
, mkconst_bits(padding_x
, false), children
[1]->clone()));
1981 assign_data
->children
[0]->str
= id_data
;
1982 assign_data
->children
[0]->was_checked
= true;
1984 if (current_always
->type
!= AST_INITIAL
) {
1985 for (int i
= 0; i
< mem_width
; i
++)
1986 set_bits_en
[i
] = offset
<= i
&& i
< offset
+width
? RTLIL::State::S1
: RTLIL::State::S0
;
1987 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_bits(set_bits_en
, false));
1988 assign_en
->children
[0]->str
= id_en
;
1989 assign_en
->children
[0]->was_checked
= true;
1994 AstNode
*the_range
= children
[0]->children
[1];
1995 AstNode
*left_at_zero_ast
= the_range
->children
[0]->clone();
1996 AstNode
*right_at_zero_ast
= the_range
->children
.size() >= 2 ? the_range
->children
[1]->clone() : left_at_zero_ast
->clone();
1997 AstNode
*offset_ast
= right_at_zero_ast
->clone();
1999 if (mem_data_range_offset
)
2000 offset_ast
= new AstNode(AST_SUB
, offset_ast
, mkconst_int(mem_data_range_offset
, true));
2002 while (left_at_zero_ast
->simplify(true, true, false, 1, -1, false, false)) { }
2003 while (right_at_zero_ast
->simplify(true, true, false, 1, -1, false, false)) { }
2004 if (left_at_zero_ast
->type
!= AST_CONSTANT
|| right_at_zero_ast
->type
!= AST_CONSTANT
)
2005 log_file_error(filename
, location
.first_line
, "Unsupported expression on dynamic range select on signal `%s'!\n", str
.c_str());
2006 int width
= abs(int(left_at_zero_ast
->integer
- right_at_zero_ast
->integer
)) + 1;
2008 assign_data
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
),
2009 new AstNode(AST_SHIFT_LEFT
, children
[1]->clone(), offset_ast
->clone()));
2010 assign_data
->children
[0]->str
= id_data
;
2011 assign_data
->children
[0]->was_checked
= true;
2013 if (current_always
->type
!= AST_INITIAL
) {
2014 for (int i
= 0; i
< mem_width
; i
++)
2015 set_bits_en
[i
] = i
< width
? RTLIL::State::S1
: RTLIL::State::S0
;
2016 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
),
2017 new AstNode(AST_SHIFT_LEFT
, mkconst_bits(set_bits_en
, false), offset_ast
->clone()));
2018 assign_en
->children
[0]->str
= id_en
;
2019 assign_en
->children
[0]->was_checked
= true;
2022 delete left_at_zero_ast
;
2023 delete right_at_zero_ast
;
2029 assign_data
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), children
[1]->clone());
2030 assign_data
->children
[0]->str
= id_data
;
2031 assign_data
->children
[0]->was_checked
= true;
2033 if (current_always
->type
!= AST_INITIAL
) {
2034 assign_en
= new AstNode(AST_ASSIGN_LE
, new AstNode(AST_IDENTIFIER
), mkconst_bits(set_bits_en
, false));
2035 assign_en
->children
[0]->str
= id_en
;
2036 assign_en
->children
[0]->was_checked
= true;
2040 newNode
= new AstNode(AST_BLOCK
);
2041 newNode
->children
.push_back(assign_addr
);
2042 newNode
->children
.push_back(assign_data
);
2043 if (current_always
->type
!= AST_INITIAL
)
2044 newNode
->children
.push_back(assign_en
);
2046 AstNode
*wrnode
= new AstNode(current_always
->type
== AST_INITIAL
? AST_MEMINIT
: AST_MEMWR
);
2047 wrnode
->children
.push_back(new AstNode(AST_IDENTIFIER
));
2048 wrnode
->children
.push_back(new AstNode(AST_IDENTIFIER
));
2049 if (current_always
->type
!= AST_INITIAL
)
2050 wrnode
->children
.push_back(new AstNode(AST_IDENTIFIER
));
2052 wrnode
->children
.push_back(AstNode::mkconst_int(1, false));
2053 wrnode
->str
= children
[0]->str
;
2054 wrnode
->id2ast
= children
[0]->id2ast
;
2055 wrnode
->children
[0]->str
= id_addr
;
2056 wrnode
->children
[1]->str
= id_data
;
2057 if (current_always
->type
!= AST_INITIAL
)
2058 wrnode
->children
[2]->str
= id_en
;
2059 current_ast_mod
->children
.push_back(wrnode
);
2064 // replace function and task calls with the code from the function or task
2065 if ((type
== AST_FCALL
|| type
== AST_TCALL
) && !str
.empty())
2067 if (type
== AST_FCALL
)
2069 if (str
== "\\$initstate")
2071 int myidx
= autoidx
++;
2073 AstNode
*wire
= new AstNode(AST_WIRE
);
2074 wire
->str
= stringf("$initstate$%d_wire", myidx
);
2075 current_ast_mod
->children
.push_back(wire
);
2076 while (wire
->simplify(true, false, false, 1, -1, false, false)) { }
2078 AstNode
*cell
= new AstNode(AST_CELL
, new AstNode(AST_CELLTYPE
), new AstNode(AST_ARGUMENT
, new AstNode(AST_IDENTIFIER
)));
2079 cell
->str
= stringf("$initstate$%d", myidx
);
2080 cell
->children
[0]->str
= "$initstate";
2081 cell
->children
[1]->str
= "\\Y";
2082 cell
->children
[1]->children
[0]->str
= wire
->str
;
2083 cell
->children
[1]->children
[0]->id2ast
= wire
;
2084 current_ast_mod
->children
.push_back(cell
);
2085 while (cell
->simplify(true, false, false, 1, -1, false, false)) { }
2087 newNode
= new AstNode(AST_IDENTIFIER
);
2088 newNode
->str
= wire
->str
;
2089 newNode
->id2ast
= wire
;
2093 if (str
== "\\$past")
2096 goto replace_fcall_later
;
2100 if (GetSize(children
) != 1 && GetSize(children
) != 2)
2101 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1 or 2.\n",
2102 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2104 if (!current_always_clocked
)
2105 log_file_error(filename
, location
.first_line
, "System function %s is only allowed in clocked blocks.\n",
2106 RTLIL::unescape_id(str
).c_str());
2108 if (GetSize(children
) == 2)
2110 AstNode
*buf
= children
[1]->clone();
2111 while (buf
->simplify(true, false, false, stage
, -1, false, false)) { }
2112 if (buf
->type
!= AST_CONSTANT
)
2113 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant value.\n", str
.c_str());
2115 num_steps
= buf
->asInt(true);
2119 AstNode
*block
= nullptr;
2121 for (auto child
: current_always
->children
)
2122 if (child
->type
== AST_BLOCK
)
2125 log_assert(block
!= nullptr);
2127 if (num_steps
== 0) {
2128 newNode
= children
[0]->clone();
2132 int myidx
= autoidx
++;
2133 AstNode
*outreg
= nullptr;
2135 for (int i
= 0; i
< num_steps
; i
++)
2137 AstNode
*reg
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
,
2138 mkconst_int(width_hint
-1, true), mkconst_int(0, true)));
2140 reg
->str
= stringf("$past$%s:%d$%d$%d", filename
.c_str(), location
.first_line
, myidx
, i
);
2143 current_ast_mod
->children
.push_back(reg
);
2145 while (reg
->simplify(true, false, false, 1, -1, false, false)) { }
2147 AstNode
*regid
= new AstNode(AST_IDENTIFIER
);
2148 regid
->str
= reg
->str
;
2149 regid
->id2ast
= reg
;
2150 regid
->was_checked
= true;
2152 AstNode
*rhs
= nullptr;
2154 if (outreg
== nullptr) {
2155 rhs
= children
.at(0)->clone();
2157 rhs
= new AstNode(AST_IDENTIFIER
);
2158 rhs
->str
= outreg
->str
;
2159 rhs
->id2ast
= outreg
;
2162 block
->children
.push_back(new AstNode(AST_ASSIGN_LE
, regid
, rhs
));
2166 newNode
= new AstNode(AST_IDENTIFIER
);
2167 newNode
->str
= outreg
->str
;
2168 newNode
->id2ast
= outreg
;
2172 if (str
== "\\$stable" || str
== "\\$rose" || str
== "\\$fell" || str
== "\\$changed")
2174 if (GetSize(children
) != 1)
2175 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1.\n",
2176 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2178 if (!current_always_clocked
)
2179 log_file_error(filename
, location
.first_line
, "System function %s is only allowed in clocked blocks.\n",
2180 RTLIL::unescape_id(str
).c_str());
2182 AstNode
*present
= children
.at(0)->clone();
2183 AstNode
*past
= clone();
2184 past
->str
= "\\$past";
2186 if (str
== "\\$stable")
2187 newNode
= new AstNode(AST_EQ
, past
, present
);
2189 else if (str
== "\\$changed")
2190 newNode
= new AstNode(AST_NE
, past
, present
);
2192 else if (str
== "\\$rose")
2193 newNode
= new AstNode(AST_LOGIC_AND
,
2194 new AstNode(AST_LOGIC_NOT
, new AstNode(AST_BIT_AND
, past
, mkconst_int(1,false))),
2195 new AstNode(AST_BIT_AND
, present
, mkconst_int(1,false)));
2197 else if (str
== "\\$fell")
2198 newNode
= new AstNode(AST_LOGIC_AND
,
2199 new AstNode(AST_BIT_AND
, past
, mkconst_int(1,false)),
2200 new AstNode(AST_LOGIC_NOT
, new AstNode(AST_BIT_AND
, present
, mkconst_int(1,false))));
2208 // $anyconst and $anyseq are mapped in AstNode::genRTLIL()
2209 if (str
== "\\$anyconst" || str
== "\\$anyseq" || str
== "\\$allconst" || str
== "\\$allseq") {
2210 recursion_counter
--;
2214 if (str
== "\\$clog2")
2216 if (children
.size() != 1)
2217 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1.\n",
2218 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2220 AstNode
*buf
= children
[0]->clone();
2221 while (buf
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2222 if (buf
->type
!= AST_CONSTANT
)
2223 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant value.\n", str
.c_str());
2225 RTLIL::Const arg_value
= buf
->bitsAsConst();
2226 if (arg_value
.as_bool())
2227 arg_value
= const_sub(arg_value
, 1, false, false, GetSize(arg_value
));
2230 uint32_t result
= 0;
2231 for (size_t i
= 0; i
< arg_value
.bits
.size(); i
++)
2232 if (arg_value
.bits
.at(i
) == RTLIL::State::S1
)
2235 newNode
= mkconst_int(result
, true);
2239 if (str
== "\\$size" || str
== "\\$bits")
2241 if (str
== "\\$bits" && children
.size() != 1)
2242 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1.\n",
2243 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2245 if (str
== "\\$size" && children
.size() != 1 && children
.size() != 2)
2246 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1 or 2.\n",
2247 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2250 if (str
== "\\$size" && children
.size() == 2) {
2251 AstNode
*buf
= children
[1]->clone();
2252 // Evaluate constant expression
2253 while (buf
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2254 dim
= buf
->asInt(false);
2257 AstNode
*buf
= children
[0]->clone();
2259 AstNode
*id_ast
= NULL
;
2262 //while (buf->simplify(true, false, false, stage, width_hint, sign_hint, false)) { }
2263 buf
->detectSignWidth(width_hint
, sign_hint
);
2265 if (buf
->type
== AST_IDENTIFIER
) {
2266 id_ast
= buf
->id2ast
;
2267 if (id_ast
== NULL
&& current_scope
.count(buf
->str
))
2268 id_ast
= current_scope
.at(buf
->str
);
2270 log_file_error(filename
, location
.first_line
, "Failed to resolve identifier %s for width detection!\n", buf
->str
.c_str());
2271 if (id_ast
->type
== AST_MEMORY
) {
2272 // We got here only if the argument is a memory
2273 // Otherwise $size() and $bits() return the expression width
2274 AstNode
*mem_range
= id_ast
->children
[1];
2275 if (str
== "\\$bits") {
2276 if (mem_range
->type
== AST_RANGE
) {
2277 if (!mem_range
->range_valid
)
2278 log_file_error(filename
, location
.first_line
, "Failed to detect width of memory access `%s'!\n", buf
->str
.c_str());
2279 mem_depth
= mem_range
->range_left
- mem_range
->range_right
+ 1;
2281 log_file_error(filename
, location
.first_line
, "Unknown memory depth AST type in `%s'!\n", buf
->str
.c_str());
2284 if (mem_range
->type
== AST_RANGE
) {
2285 if (!mem_range
->range_valid
)
2286 log_file_error(filename
, location
.first_line
, "Failed to detect width of memory access `%s'!\n", buf
->str
.c_str());
2288 if (id_ast
->multirange_dimensions
.empty())
2291 dims
= GetSize(id_ast
->multirange_dimensions
)/2;
2293 width_hint
= (dims
> 1) ? id_ast
->multirange_dimensions
[1] : (mem_range
->range_left
- mem_range
->range_right
+ 1);
2294 else if (dim
<= dims
) {
2295 width_hint
= id_ast
->multirange_dimensions
[2*dim
-1];
2296 } else if ((dim
> dims
+1) || (dim
< 0))
2297 log_file_error(filename
, location
.first_line
, "Dimension %d out of range in `%s', as it only has dimensions 1..%d!\n", dim
, buf
->str
.c_str(), dims
+1);
2299 log_file_error(filename
, location
.first_line
, "Unknown memory depth AST type in `%s'!\n", buf
->str
.c_str());
2305 newNode
= mkconst_int(width_hint
* mem_depth
, false);
2309 if (str
== "\\$ln" || str
== "\\$log10" || str
== "\\$exp" || str
== "\\$sqrt" || str
== "\\$pow" ||
2310 str
== "\\$floor" || str
== "\\$ceil" || str
== "\\$sin" || str
== "\\$cos" || str
== "\\$tan" ||
2311 str
== "\\$asin" || str
== "\\$acos" || str
== "\\$atan" || str
== "\\$atan2" || str
== "\\$hypot" ||
2312 str
== "\\$sinh" || str
== "\\$cosh" || str
== "\\$tanh" || str
== "\\$asinh" || str
== "\\$acosh" || str
== "\\$atanh" ||
2313 str
== "\\$rtoi" || str
== "\\$itor")
2315 bool func_with_two_arguments
= str
== "\\$pow" || str
== "\\$atan2" || str
== "\\$hypot";
2316 double x
= 0, y
= 0;
2318 if (func_with_two_arguments
) {
2319 if (children
.size() != 2)
2320 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 2.\n",
2321 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2323 if (children
.size() != 1)
2324 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 1.\n",
2325 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2328 if (children
.size() >= 1) {
2329 while (children
[0]->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2330 if (!children
[0]->isConst())
2331 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant argument.\n",
2332 RTLIL::unescape_id(str
).c_str());
2333 int child_width_hint
= width_hint
;
2334 bool child_sign_hint
= sign_hint
;
2335 children
[0]->detectSignWidth(child_width_hint
, child_sign_hint
);
2336 x
= children
[0]->asReal(child_sign_hint
);
2339 if (children
.size() >= 2) {
2340 while (children
[1]->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2341 if (!children
[1]->isConst())
2342 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant argument.\n",
2343 RTLIL::unescape_id(str
).c_str());
2344 int child_width_hint
= width_hint
;
2345 bool child_sign_hint
= sign_hint
;
2346 children
[1]->detectSignWidth(child_width_hint
, child_sign_hint
);
2347 y
= children
[1]->asReal(child_sign_hint
);
2350 if (str
== "\\$rtoi") {
2351 newNode
= AstNode::mkconst_int(x
, true);
2353 newNode
= new AstNode(AST_REALVALUE
);
2354 if (str
== "\\$ln") newNode
->realvalue
= ::log(x
);
2355 else if (str
== "\\$log10") newNode
->realvalue
= ::log10(x
);
2356 else if (str
== "\\$exp") newNode
->realvalue
= ::exp(x
);
2357 else if (str
== "\\$sqrt") newNode
->realvalue
= ::sqrt(x
);
2358 else if (str
== "\\$pow") newNode
->realvalue
= ::pow(x
, y
);
2359 else if (str
== "\\$floor") newNode
->realvalue
= ::floor(x
);
2360 else if (str
== "\\$ceil") newNode
->realvalue
= ::ceil(x
);
2361 else if (str
== "\\$sin") newNode
->realvalue
= ::sin(x
);
2362 else if (str
== "\\$cos") newNode
->realvalue
= ::cos(x
);
2363 else if (str
== "\\$tan") newNode
->realvalue
= ::tan(x
);
2364 else if (str
== "\\$asin") newNode
->realvalue
= ::asin(x
);
2365 else if (str
== "\\$acos") newNode
->realvalue
= ::acos(x
);
2366 else if (str
== "\\$atan") newNode
->realvalue
= ::atan(x
);
2367 else if (str
== "\\$atan2") newNode
->realvalue
= ::atan2(x
, y
);
2368 else if (str
== "\\$hypot") newNode
->realvalue
= ::hypot(x
, y
);
2369 else if (str
== "\\$sinh") newNode
->realvalue
= ::sinh(x
);
2370 else if (str
== "\\$cosh") newNode
->realvalue
= ::cosh(x
);
2371 else if (str
== "\\$tanh") newNode
->realvalue
= ::tanh(x
);
2372 else if (str
== "\\$asinh") newNode
->realvalue
= ::asinh(x
);
2373 else if (str
== "\\$acosh") newNode
->realvalue
= ::acosh(x
);
2374 else if (str
== "\\$atanh") newNode
->realvalue
= ::atanh(x
);
2375 else if (str
== "\\$itor") newNode
->realvalue
= x
;
2381 if (str
== "\\$sformatf") {
2382 AstNode
*node_string
= children
[0];
2383 while (node_string
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2384 if (node_string
->type
!= AST_CONSTANT
)
2385 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant 1st argument.\n", str
.c_str());
2386 std::string sformat
= node_string
->bitsAsConst().decode_string();
2387 std::string sout
= process_format_str(sformat
, 1, stage
, width_hint
, sign_hint
);
2388 newNode
= AstNode::mkconst_str(sout
);
2392 if (current_scope
.count(str
) != 0 && current_scope
[str
]->type
== AST_DPI_FUNCTION
)
2394 AstNode
*dpi_decl
= current_scope
[str
];
2396 std::string rtype
, fname
;
2397 std::vector
<std::string
> argtypes
;
2398 std::vector
<AstNode
*> args
;
2400 rtype
= RTLIL::unescape_id(dpi_decl
->children
.at(0)->str
);
2401 fname
= RTLIL::unescape_id(dpi_decl
->children
.at(1)->str
);
2403 for (int i
= 2; i
< GetSize(dpi_decl
->children
); i
++)
2405 if (i
-2 >= GetSize(children
))
2406 log_file_error(filename
, location
.first_line
, "Insufficient number of arguments in DPI function call.\n");
2408 argtypes
.push_back(RTLIL::unescape_id(dpi_decl
->children
.at(i
)->str
));
2409 args
.push_back(children
.at(i
-2)->clone());
2410 while (args
.back()->simplify(true, false, false, stage
, -1, false, true)) { }
2412 if (args
.back()->type
!= AST_CONSTANT
&& args
.back()->type
!= AST_REALVALUE
)
2413 log_file_error(filename
, location
.first_line
, "Failed to evaluate DPI function with non-constant argument.\n");
2416 newNode
= dpi_call(rtype
, fname
, argtypes
, args
);
2418 for (auto arg
: args
)
2424 if (current_scope
.count(str
) == 0 || current_scope
[str
]->type
!= AST_FUNCTION
)
2425 log_file_error(filename
, location
.first_line
, "Can't resolve function name `%s'.\n", str
.c_str());
2428 if (type
== AST_TCALL
)
2430 if (str
== "$finish" || str
== "$stop")
2432 if (!current_always
|| current_always
->type
!= AST_INITIAL
)
2433 log_file_error(filename
, location
.first_line
, "System task `%s' outside initial block is unsupported.\n", str
.c_str());
2435 log_file_error(filename
, location
.first_line
, "System task `%s' executed.\n", str
.c_str());
2438 if (str
== "\\$readmemh" || str
== "\\$readmemb")
2440 if (GetSize(children
) < 2 || GetSize(children
) > 4)
2441 log_file_error(filename
, location
.first_line
, "System function %s got %d arguments, expected 2-4.\n",
2442 RTLIL::unescape_id(str
).c_str(), int(children
.size()));
2444 AstNode
*node_filename
= children
[0]->clone();
2445 while (node_filename
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2446 if (node_filename
->type
!= AST_CONSTANT
)
2447 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant 1st argument.\n", str
.c_str());
2449 AstNode
*node_memory
= children
[1]->clone();
2450 while (node_memory
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2451 if (node_memory
->type
!= AST_IDENTIFIER
|| node_memory
->id2ast
== nullptr || node_memory
->id2ast
->type
!= AST_MEMORY
)
2452 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-memory 2nd argument.\n", str
.c_str());
2454 int start_addr
= -1, finish_addr
= -1;
2456 if (GetSize(children
) > 2) {
2457 AstNode
*node_addr
= children
[2]->clone();
2458 while (node_addr
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2459 if (node_addr
->type
!= AST_CONSTANT
)
2460 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant 3rd argument.\n", str
.c_str());
2461 start_addr
= int(node_addr
->asInt(false));
2464 if (GetSize(children
) > 3) {
2465 AstNode
*node_addr
= children
[3]->clone();
2466 while (node_addr
->simplify(true, false, false, stage
, width_hint
, sign_hint
, false)) { }
2467 if (node_addr
->type
!= AST_CONSTANT
)
2468 log_file_error(filename
, location
.first_line
, "Failed to evaluate system function `%s' with non-constant 4th argument.\n", str
.c_str());
2469 finish_addr
= int(node_addr
->asInt(false));
2472 bool unconditional_init
= false;
2473 if (current_always
->type
== AST_INITIAL
) {
2474 pool
<AstNode
*> queue
;
2475 log_assert(current_always
->children
[0]->type
== AST_BLOCK
);
2476 queue
.insert(current_always
->children
[0]);
2477 while (!unconditional_init
&& !queue
.empty()) {
2478 pool
<AstNode
*> next_queue
;
2479 for (auto n
: queue
)
2480 for (auto c
: n
->children
) {
2482 unconditional_init
= true;
2483 next_queue
.insert(c
);
2485 next_queue
.swap(queue
);
2489 newNode
= readmem(str
== "\\$readmemh", node_filename
->bitsAsConst().decode_string(), node_memory
->id2ast
, start_addr
, finish_addr
, unconditional_init
);
2490 delete node_filename
;
2495 if (current_scope
.count(str
) == 0 || current_scope
[str
]->type
!= AST_TASK
)
2496 log_file_error(filename
, location
.first_line
, "Can't resolve task name `%s'.\n", str
.c_str());
2499 AstNode
*decl
= current_scope
[str
];
2501 std::stringstream sstr
;
2502 sstr
<< "$func$" << str
<< "$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++) << "$";
2503 std::string prefix
= sstr
.str();
2505 bool recommend_const_eval
= false;
2506 bool require_const_eval
= in_param
? false : has_const_only_constructs(recommend_const_eval
);
2507 if ((in_param
|| recommend_const_eval
|| require_const_eval
) && !decl
->attributes
.count("\\via_celltype"))
2509 bool all_args_const
= true;
2510 for (auto child
: children
) {
2511 while (child
->simplify(true, false, false, 1, -1, false, true)) { }
2512 if (child
->type
!= AST_CONSTANT
)
2513 all_args_const
= false;
2516 if (all_args_const
) {
2517 AstNode
*func_workspace
= current_scope
[str
]->clone();
2518 newNode
= func_workspace
->eval_const_function(this);
2519 delete func_workspace
;
2524 log_file_error(filename
, location
.first_line
, "Non-constant function call in constant expression.\n");
2525 if (require_const_eval
)
2526 log_file_error(filename
, location
.first_line
, "Function %s can only be called with constant arguments.\n", str
.c_str());
2529 size_t arg_count
= 0;
2530 std::map
<std::string
, std::string
> replace_rules
;
2531 vector
<AstNode
*> added_mod_children
;
2532 dict
<std::string
, AstNode
*> wire_cache
;
2533 vector
<AstNode
*> new_stmts
;
2534 vector
<AstNode
*> output_assignments
;
2536 if (current_block
== NULL
)
2538 log_assert(type
== AST_FCALL
);
2540 AstNode
*wire
= NULL
;
2541 for (auto child
: decl
->children
)
2542 if (child
->type
== AST_WIRE
&& child
->str
== str
)
2543 wire
= child
->clone();
2544 log_assert(wire
!= NULL
);
2546 wire
->str
= prefix
+ str
;
2548 wire
->is_input
= false;
2549 wire
->is_output
= false;
2551 current_ast_mod
->children
.push_back(wire
);
2552 while (wire
->simplify(true, false, false, 1, -1, false, false)) { }
2554 AstNode
*lvalue
= new AstNode(AST_IDENTIFIER
);
2555 lvalue
->str
= wire
->str
;
2557 AstNode
*always
= new AstNode(AST_ALWAYS
, new AstNode(AST_BLOCK
,
2558 new AstNode(AST_ASSIGN_EQ
, lvalue
, clone())));
2559 always
->children
[0]->children
[0]->was_checked
= true;
2561 current_ast_mod
->children
.push_back(always
);
2563 goto replace_fcall_with_id
;
2566 if (decl
->attributes
.count("\\via_celltype"))
2568 std::string celltype
= decl
->attributes
.at("\\via_celltype")->asAttrConst().decode_string();
2569 std::string outport
= str
;
2571 if (celltype
.find(' ') != std::string::npos
) {
2572 int pos
= celltype
.find(' ');
2573 outport
= RTLIL::escape_id(celltype
.substr(pos
+1));
2574 celltype
= RTLIL::escape_id(celltype
.substr(0, pos
));
2576 celltype
= RTLIL::escape_id(celltype
);
2578 AstNode
*cell
= new AstNode(AST_CELL
, new AstNode(AST_CELLTYPE
));
2579 cell
->str
= prefix
.substr(0, GetSize(prefix
)-1);
2580 cell
->children
[0]->str
= celltype
;
2582 for (auto attr
: decl
->attributes
)
2583 if (attr
.first
.str().rfind("\\via_celltype_defparam_", 0) == 0)
2585 AstNode
*cell_arg
= new AstNode(AST_PARASET
, attr
.second
->clone());
2586 cell_arg
->str
= RTLIL::escape_id(attr
.first
.substr(strlen("\\via_celltype_defparam_")));
2587 cell
->children
.push_back(cell_arg
);
2590 for (auto child
: decl
->children
)
2591 if (child
->type
== AST_WIRE
&& (child
->is_input
|| child
->is_output
|| (type
== AST_FCALL
&& child
->str
== str
)))
2593 AstNode
*wire
= child
->clone();
2594 wire
->str
= prefix
+ wire
->str
;
2596 wire
->is_input
= false;
2597 wire
->is_output
= false;
2598 current_ast_mod
->children
.push_back(wire
);
2599 while (wire
->simplify(true, false, false, 1, -1, false, false)) { }
2601 AstNode
*wire_id
= new AstNode(AST_IDENTIFIER
);
2602 wire_id
->str
= wire
->str
;
2604 if ((child
->is_input
|| child
->is_output
) && arg_count
< children
.size())
2606 AstNode
*arg
= children
[arg_count
++]->clone();
2607 AstNode
*assign
= child
->is_input
?
2608 new AstNode(AST_ASSIGN_EQ
, wire_id
->clone(), arg
) :
2609 new AstNode(AST_ASSIGN_EQ
, arg
, wire_id
->clone());
2610 assign
->children
[0]->was_checked
= true;
2612 for (auto it
= current_block
->children
.begin(); it
!= current_block
->children
.end(); it
++) {
2613 if (*it
!= current_block_child
)
2615 current_block
->children
.insert(it
, assign
);
2620 AstNode
*cell_arg
= new AstNode(AST_ARGUMENT
, wire_id
);
2621 cell_arg
->str
= child
->str
== str
? outport
: child
->str
;
2622 cell
->children
.push_back(cell_arg
);
2625 current_ast_mod
->children
.push_back(cell
);
2626 goto replace_fcall_with_id
;
2629 for (auto child
: decl
->children
)
2630 if (child
->type
== AST_WIRE
|| child
->type
== AST_MEMORY
|| child
->type
== AST_PARAMETER
|| child
->type
== AST_LOCALPARAM
|| child
->type
== AST_ENUM_ITEM
)
2632 AstNode
*wire
= nullptr;
2634 if (wire_cache
.count(child
->str
))
2636 wire
= wire_cache
.at(child
->str
);
2637 if (wire
->children
.empty()) {
2638 for (auto c
: child
->children
)
2639 wire
->children
.push_back(c
->clone());
2640 } else if (!child
->children
.empty()) {
2641 while (child
->simplify(true, false, false, stage
, -1, false, false)) { }
2642 if (GetSize(child
->children
) == GetSize(wire
->children
)) {
2643 for (int i
= 0; i
< GetSize(child
->children
); i
++)
2644 if (*child
->children
.at(i
) != *wire
->children
.at(i
))
2645 goto tcall_incompatible_wires
;
2647 tcall_incompatible_wires
:
2648 log_file_error(filename
, location
.first_line
, "Incompatible re-declaration of wire %s.\n", child
->str
.c_str());
2654 wire
= child
->clone();
2655 wire
->str
= prefix
+ wire
->str
;
2657 wire
->is_input
= false;
2658 wire
->is_output
= false;
2659 wire
->is_reg
= true;
2660 wire
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
2661 if (child
->type
== AST_ENUM_ITEM
)
2662 wire
->attributes
["\\enum_base_type"] = child
->attributes
["\\enum_base_type"];
2664 wire_cache
[child
->str
] = wire
;
2666 current_ast_mod
->children
.push_back(wire
);
2667 added_mod_children
.push_back(wire
);
2670 if (child
->type
== AST_WIRE
)
2671 while (wire
->simplify(true, false, false, 1, -1, false, false)) { }
2673 replace_rules
[child
->str
] = wire
->str
;
2674 current_scope
[wire
->str
] = wire
;
2676 if ((child
->is_input
|| child
->is_output
) && arg_count
< children
.size())
2678 AstNode
*arg
= children
[arg_count
++]->clone();
2679 AstNode
*wire_id
= new AstNode(AST_IDENTIFIER
);
2680 wire_id
->str
= wire
->str
;
2681 AstNode
*assign
= child
->is_input
?
2682 new AstNode(AST_ASSIGN_EQ
, wire_id
, arg
) :
2683 new AstNode(AST_ASSIGN_EQ
, arg
, wire_id
);
2684 assign
->children
[0]->was_checked
= true;
2685 if (child
->is_input
)
2686 new_stmts
.push_back(assign
);
2688 output_assignments
.push_back(assign
);
2692 for (auto child
: added_mod_children
) {
2693 child
->replace_ids(prefix
, replace_rules
);
2694 while (child
->simplify(true, false, false, 1, -1, false, false)) { }
2697 for (auto child
: decl
->children
)
2698 if (child
->type
!= AST_WIRE
&& child
->type
!= AST_MEMORY
&& child
->type
!= AST_PARAMETER
&& child
->type
!= AST_LOCALPARAM
)
2700 AstNode
*stmt
= child
->clone();
2701 stmt
->replace_ids(prefix
, replace_rules
);
2702 new_stmts
.push_back(stmt
);
2705 new_stmts
.insert(new_stmts
.end(), output_assignments
.begin(), output_assignments
.end());
2707 for (auto it
= current_block
->children
.begin(); ; it
++) {
2708 log_assert(it
!= current_block
->children
.end());
2709 if (*it
== current_block_child
) {
2710 current_block
->children
.insert(it
, new_stmts
.begin(), new_stmts
.end());
2715 replace_fcall_with_id
:
2716 if (type
== AST_FCALL
) {
2718 type
= AST_IDENTIFIER
;
2721 if (type
== AST_TCALL
)
2723 did_something
= true;
2726 replace_fcall_later
:;
2728 // perform const folding when activated
2732 std::vector
<RTLIL::State
> tmp_bits
;
2733 RTLIL::Const (*const_func
)(const RTLIL::Const
&, const RTLIL::Const
&, bool, bool, int);
2734 RTLIL::Const dummy_arg
;
2738 case AST_IDENTIFIER
:
2739 if (current_scope
.count(str
) > 0 && (current_scope
[str
]->type
== AST_PARAMETER
|| current_scope
[str
]->type
== AST_LOCALPARAM
|| current_scope
[str
]->type
== AST_ENUM_ITEM
)) {
2740 if (current_scope
[str
]->children
[0]->type
== AST_CONSTANT
) {
2741 if (children
.size() != 0 && children
[0]->type
== AST_RANGE
&& children
[0]->range_valid
) {
2742 std::vector
<RTLIL::State
> data
;
2743 bool param_upto
= current_scope
[str
]->range_valid
&& current_scope
[str
]->range_swapped
;
2744 int param_offset
= current_scope
[str
]->range_valid
? current_scope
[str
]->range_right
: 0;
2745 int param_width
= current_scope
[str
]->range_valid
? current_scope
[str
]->range_left
- current_scope
[str
]->range_right
+ 1 :
2746 GetSize(current_scope
[str
]->children
[0]->bits
);
2747 int tmp_range_left
= children
[0]->range_left
, tmp_range_right
= children
[0]->range_right
;
2749 tmp_range_left
= (param_width
+ 2*param_offset
) - children
[0]->range_right
- 1;
2750 tmp_range_right
= (param_width
+ 2*param_offset
) - children
[0]->range_left
- 1;
2752 for (int i
= tmp_range_right
; i
<= tmp_range_left
; i
++) {
2753 int index
= i
- param_offset
;
2754 if (0 <= index
&& index
< param_width
)
2755 data
.push_back(current_scope
[str
]->children
[0]->bits
[index
]);
2757 data
.push_back(RTLIL::State::Sx
);
2759 newNode
= mkconst_bits(data
, false);
2761 if (children
.size() == 0)
2762 newNode
= current_scope
[str
]->children
[0]->clone();
2764 if (current_scope
[str
]->children
[0]->isConst())
2765 newNode
= current_scope
[str
]->children
[0]->clone();
2767 else if (at_zero
&& current_scope
.count(str
) > 0 && (current_scope
[str
]->type
== AST_WIRE
|| current_scope
[str
]->type
== AST_AUTOWIRE
)) {
2768 newNode
= mkconst_int(0, sign_hint
, width_hint
);
2772 if (children
[0]->type
== AST_CONSTANT
) {
2773 RTLIL::Const y
= RTLIL::const_not(children
[0]->bitsAsConst(width_hint
, sign_hint
), dummy_arg
, sign_hint
, false, width_hint
);
2774 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2778 case AST_TO_UNSIGNED
:
2779 if (children
[0]->type
== AST_CONSTANT
) {
2780 RTLIL::Const y
= children
[0]->bitsAsConst(width_hint
, sign_hint
);
2781 newNode
= mkconst_bits(y
.bits
, type
== AST_TO_SIGNED
);
2784 if (0) { case AST_BIT_AND
: const_func
= RTLIL::const_and
; }
2785 if (0) { case AST_BIT_OR
: const_func
= RTLIL::const_or
; }
2786 if (0) { case AST_BIT_XOR
: const_func
= RTLIL::const_xor
; }
2787 if (0) { case AST_BIT_XNOR
: const_func
= RTLIL::const_xnor
; }
2788 if (children
[0]->type
== AST_CONSTANT
&& children
[1]->type
== AST_CONSTANT
) {
2789 RTLIL::Const y
= const_func(children
[0]->bitsAsConst(width_hint
, sign_hint
),
2790 children
[1]->bitsAsConst(width_hint
, sign_hint
), sign_hint
, sign_hint
, width_hint
);
2791 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2794 if (0) { case AST_REDUCE_AND
: const_func
= RTLIL::const_reduce_and
; }
2795 if (0) { case AST_REDUCE_OR
: const_func
= RTLIL::const_reduce_or
; }
2796 if (0) { case AST_REDUCE_XOR
: const_func
= RTLIL::const_reduce_xor
; }
2797 if (0) { case AST_REDUCE_XNOR
: const_func
= RTLIL::const_reduce_xnor
; }
2798 if (0) { case AST_REDUCE_BOOL
: const_func
= RTLIL::const_reduce_bool
; }
2799 if (children
[0]->type
== AST_CONSTANT
) {
2800 RTLIL::Const y
= const_func(RTLIL::Const(children
[0]->bits
), dummy_arg
, false, false, -1);
2801 newNode
= mkconst_bits(y
.bits
, false);
2805 if (children
[0]->type
== AST_CONSTANT
) {
2806 RTLIL::Const y
= RTLIL::const_logic_not(RTLIL::Const(children
[0]->bits
), dummy_arg
, children
[0]->is_signed
, false, -1);
2807 newNode
= mkconst_bits(y
.bits
, false);
2809 if (children
[0]->isConst()) {
2810 newNode
= mkconst_int(children
[0]->asReal(sign_hint
) == 0, false, 1);
2813 if (0) { case AST_LOGIC_AND
: const_func
= RTLIL::const_logic_and
; }
2814 if (0) { case AST_LOGIC_OR
: const_func
= RTLIL::const_logic_or
; }
2815 if (children
[0]->type
== AST_CONSTANT
&& children
[1]->type
== AST_CONSTANT
) {
2816 RTLIL::Const y
= const_func(RTLIL::Const(children
[0]->bits
), RTLIL::Const(children
[1]->bits
),
2817 children
[0]->is_signed
, children
[1]->is_signed
, -1);
2818 newNode
= mkconst_bits(y
.bits
, false);
2820 if (children
[0]->isConst() && children
[1]->isConst()) {
2821 if (type
== AST_LOGIC_AND
)
2822 newNode
= mkconst_int((children
[0]->asReal(sign_hint
) != 0) && (children
[1]->asReal(sign_hint
) != 0), false, 1);
2824 newNode
= mkconst_int((children
[0]->asReal(sign_hint
) != 0) || (children
[1]->asReal(sign_hint
) != 0), false, 1);
2827 if (0) { case AST_SHIFT_LEFT
: const_func
= RTLIL::const_shl
; }
2828 if (0) { case AST_SHIFT_RIGHT
: const_func
= RTLIL::const_shr
; }
2829 if (0) { case AST_SHIFT_SLEFT
: const_func
= RTLIL::const_sshl
; }
2830 if (0) { case AST_SHIFT_SRIGHT
: const_func
= RTLIL::const_sshr
; }
2831 if (0) { case AST_POW
: const_func
= RTLIL::const_pow
; }
2832 if (children
[0]->type
== AST_CONSTANT
&& children
[1]->type
== AST_CONSTANT
) {
2833 RTLIL::Const y
= const_func(children
[0]->bitsAsConst(width_hint
, sign_hint
),
2834 RTLIL::Const(children
[1]->bits
), sign_hint
, type
== AST_POW
? children
[1]->is_signed
: false, width_hint
);
2835 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2837 if (type
== AST_POW
&& children
[0]->isConst() && children
[1]->isConst()) {
2838 newNode
= new AstNode(AST_REALVALUE
);
2839 newNode
->realvalue
= pow(children
[0]->asReal(sign_hint
), children
[1]->asReal(sign_hint
));
2842 if (0) { case AST_LT
: const_func
= RTLIL::const_lt
; }
2843 if (0) { case AST_LE
: const_func
= RTLIL::const_le
; }
2844 if (0) { case AST_EQ
: const_func
= RTLIL::const_eq
; }
2845 if (0) { case AST_NE
: const_func
= RTLIL::const_ne
; }
2846 if (0) { case AST_EQX
: const_func
= RTLIL::const_eqx
; }
2847 if (0) { case AST_NEX
: const_func
= RTLIL::const_nex
; }
2848 if (0) { case AST_GE
: const_func
= RTLIL::const_ge
; }
2849 if (0) { case AST_GT
: const_func
= RTLIL::const_gt
; }
2850 if (children
[0]->type
== AST_CONSTANT
&& children
[1]->type
== AST_CONSTANT
) {
2851 int cmp_width
= max(children
[0]->bits
.size(), children
[1]->bits
.size());
2852 bool cmp_signed
= children
[0]->is_signed
&& children
[1]->is_signed
;
2853 RTLIL::Const y
= const_func(children
[0]->bitsAsConst(cmp_width
, cmp_signed
),
2854 children
[1]->bitsAsConst(cmp_width
, cmp_signed
), cmp_signed
, cmp_signed
, 1);
2855 newNode
= mkconst_bits(y
.bits
, false);
2857 if (children
[0]->isConst() && children
[1]->isConst()) {
2858 bool cmp_signed
= (children
[0]->type
== AST_REALVALUE
|| children
[0]->is_signed
) && (children
[1]->type
== AST_REALVALUE
|| children
[1]->is_signed
);
2860 case AST_LT
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) < children
[1]->asReal(cmp_signed
), false, 1); break;
2861 case AST_LE
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) <= children
[1]->asReal(cmp_signed
), false, 1); break;
2862 case AST_EQ
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) == children
[1]->asReal(cmp_signed
), false, 1); break;
2863 case AST_NE
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) != children
[1]->asReal(cmp_signed
), false, 1); break;
2864 case AST_EQX
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) == children
[1]->asReal(cmp_signed
), false, 1); break;
2865 case AST_NEX
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) != children
[1]->asReal(cmp_signed
), false, 1); break;
2866 case AST_GE
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) >= children
[1]->asReal(cmp_signed
), false, 1); break;
2867 case AST_GT
: newNode
= mkconst_int(children
[0]->asReal(cmp_signed
) > children
[1]->asReal(cmp_signed
), false, 1); break;
2868 default: log_abort();
2872 if (0) { case AST_ADD
: const_func
= RTLIL::const_add
; }
2873 if (0) { case AST_SUB
: const_func
= RTLIL::const_sub
; }
2874 if (0) { case AST_MUL
: const_func
= RTLIL::const_mul
; }
2875 if (0) { case AST_DIV
: const_func
= RTLIL::const_div
; }
2876 if (0) { case AST_MOD
: const_func
= RTLIL::const_mod
; }
2877 if (children
[0]->type
== AST_CONSTANT
&& children
[1]->type
== AST_CONSTANT
) {
2878 RTLIL::Const y
= const_func(children
[0]->bitsAsConst(width_hint
, sign_hint
),
2879 children
[1]->bitsAsConst(width_hint
, sign_hint
), sign_hint
, sign_hint
, width_hint
);
2880 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2882 if (children
[0]->isConst() && children
[1]->isConst()) {
2883 newNode
= new AstNode(AST_REALVALUE
);
2885 case AST_ADD
: newNode
->realvalue
= children
[0]->asReal(sign_hint
) + children
[1]->asReal(sign_hint
); break;
2886 case AST_SUB
: newNode
->realvalue
= children
[0]->asReal(sign_hint
) - children
[1]->asReal(sign_hint
); break;
2887 case AST_MUL
: newNode
->realvalue
= children
[0]->asReal(sign_hint
) * children
[1]->asReal(sign_hint
); break;
2888 case AST_DIV
: newNode
->realvalue
= children
[0]->asReal(sign_hint
) / children
[1]->asReal(sign_hint
); break;
2889 case AST_MOD
: newNode
->realvalue
= fmod(children
[0]->asReal(sign_hint
), children
[1]->asReal(sign_hint
)); break;
2890 default: log_abort();
2894 if (0) { case AST_POS
: const_func
= RTLIL::const_pos
; }
2895 if (0) { case AST_NEG
: const_func
= RTLIL::const_neg
; }
2896 if (children
[0]->type
== AST_CONSTANT
) {
2897 RTLIL::Const y
= const_func(children
[0]->bitsAsConst(width_hint
, sign_hint
), dummy_arg
, sign_hint
, false, width_hint
);
2898 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2900 if (children
[0]->isConst()) {
2901 newNode
= new AstNode(AST_REALVALUE
);
2902 if (type
== AST_POS
)
2903 newNode
->realvalue
= +children
[0]->asReal(sign_hint
);
2905 newNode
->realvalue
= -children
[0]->asReal(sign_hint
);
2909 if (children
[0]->isConst())
2911 bool found_sure_true
= false;
2912 bool found_maybe_true
= false;
2914 if (children
[0]->type
== AST_CONSTANT
)
2915 for (auto &bit
: children
[0]->bits
) {
2916 if (bit
== RTLIL::State::S1
)
2917 found_sure_true
= true;
2918 if (bit
> RTLIL::State::S1
)
2919 found_maybe_true
= true;
2922 found_sure_true
= children
[0]->asReal(sign_hint
) != 0;
2924 AstNode
*choice
= NULL
, *not_choice
= NULL
;
2925 if (found_sure_true
)
2926 choice
= children
[1], not_choice
= children
[2];
2927 else if (!found_maybe_true
)
2928 choice
= children
[2], not_choice
= children
[1];
2930 if (choice
!= NULL
) {
2931 if (choice
->type
== AST_CONSTANT
) {
2932 int other_width_hint
= width_hint
;
2933 bool other_sign_hint
= sign_hint
, other_real
= false;
2934 not_choice
->detectSignWidth(other_width_hint
, other_sign_hint
, &other_real
);
2936 newNode
= new AstNode(AST_REALVALUE
);
2937 choice
->detectSignWidth(width_hint
, sign_hint
);
2938 newNode
->realvalue
= choice
->asReal(sign_hint
);
2940 RTLIL::Const y
= choice
->bitsAsConst(width_hint
, sign_hint
);
2941 if (choice
->is_string
&& y
.bits
.size() % 8 == 0 && sign_hint
== false)
2942 newNode
= mkconst_str(y
.bits
);
2944 newNode
= mkconst_bits(y
.bits
, sign_hint
);
2947 if (choice
->isConst()) {
2948 newNode
= choice
->clone();
2950 } else if (children
[1]->type
== AST_CONSTANT
&& children
[2]->type
== AST_CONSTANT
) {
2951 RTLIL::Const a
= children
[1]->bitsAsConst(width_hint
, sign_hint
);
2952 RTLIL::Const b
= children
[2]->bitsAsConst(width_hint
, sign_hint
);
2953 log_assert(a
.bits
.size() == b
.bits
.size());
2954 for (size_t i
= 0; i
< a
.bits
.size(); i
++)
2955 if (a
.bits
[i
] != b
.bits
[i
])
2956 a
.bits
[i
] = RTLIL::State::Sx
;
2957 newNode
= mkconst_bits(a
.bits
, sign_hint
);
2958 } else if (children
[1]->isConst() && children
[2]->isConst()) {
2959 newNode
= new AstNode(AST_REALVALUE
);
2960 if (children
[1]->asReal(sign_hint
) == children
[2]->asReal(sign_hint
))
2961 newNode
->realvalue
= children
[1]->asReal(sign_hint
);
2963 // IEEE Std 1800-2012 Sec. 11.4.11 states that the entry in Table 7-1 for
2964 // the data type in question should be returned if the ?: is ambiguous. The
2965 // value in Table 7-1 for the 'real' type is 0.0.
2966 newNode
->realvalue
= 0.0;
2971 string_op
= !children
.empty();
2972 for (auto it
= children
.begin(); it
!= children
.end(); it
++) {
2973 if ((*it
)->type
!= AST_CONSTANT
)
2975 if (!(*it
)->is_string
)
2977 tmp_bits
.insert(tmp_bits
.end(), (*it
)->bits
.begin(), (*it
)->bits
.end());
2979 newNode
= string_op
? mkconst_str(tmp_bits
) : mkconst_bits(tmp_bits
, false);
2982 if (children
.at(0)->type
!= AST_CONSTANT
|| children
.at(1)->type
!= AST_CONSTANT
)
2984 for (int i
= 0; i
< children
[0]->bitsAsConst().as_int(); i
++)
2985 tmp_bits
.insert(tmp_bits
.end(), children
.at(1)->bits
.begin(), children
.at(1)->bits
.end());
2986 newNode
= children
.at(1)->is_string
? mkconst_str(tmp_bits
) : mkconst_bits(tmp_bits
, false);
2994 // if any of the above set 'newNode' -> use 'newNode' as template to update 'this'
2997 // fprintf(stderr, "----\n");
2998 // dumpAst(stderr, "- ");
2999 // newNode->dumpAst(stderr, "+ ");
3000 log_assert(newNode
!= NULL
);
3001 newNode
->filename
= filename
;
3002 newNode
->location
= location
;
3003 newNode
->cloneInto(this);
3005 did_something
= true;
3011 recursion_counter
--;
3012 return did_something
;
3015 static void replace_result_wire_name_in_function(AstNode
*node
, std::string
&from
, std::string
&to
)
3017 for (auto &it
: node
->children
)
3018 replace_result_wire_name_in_function(it
, from
, to
);
3019 if (node
->str
== from
)
3023 // replace a readmem[bh] TCALL ast node with a block of memory assignments
3024 AstNode
*AstNode::readmem(bool is_readmemh
, std::string mem_filename
, AstNode
*memory
, int start_addr
, int finish_addr
, bool unconditional_init
)
3026 int mem_width
, mem_size
, addr_bits
;
3027 memory
->meminfo(mem_width
, mem_size
, addr_bits
);
3029 AstNode
*block
= new AstNode(AST_BLOCK
);
3031 AstNode
*meminit
= nullptr;
3032 int next_meminit_cursor
=0;
3033 vector
<State
> meminit_bits
;
3037 f
.open(mem_filename
.c_str());
3044 std::string path
= filename
.substr(0, filename
.find_last_of(slash
)+1);
3045 f
.open(path
+ mem_filename
.c_str());
3046 yosys_input_files
.insert(path
+ mem_filename
);
3048 yosys_input_files
.insert(mem_filename
);
3050 if (f
.fail() || GetSize(mem_filename
) == 0)
3051 log_file_error(filename
, location
.first_line
, "Can not open file `%s` for %s.\n", mem_filename
.c_str(), str
.c_str());
3053 log_assert(GetSize(memory
->children
) == 2 && memory
->children
[1]->type
== AST_RANGE
&& memory
->children
[1]->range_valid
);
3054 int range_left
= memory
->children
[1]->range_left
, range_right
= memory
->children
[1]->range_right
;
3055 int range_min
= min(range_left
, range_right
), range_max
= max(range_left
, range_right
);
3058 start_addr
= range_min
;
3060 if (finish_addr
< 0)
3061 finish_addr
= range_max
+ 1;
3063 bool in_comment
= false;
3064 int increment
= start_addr
<= finish_addr
? +1 : -1;
3065 int cursor
= start_addr
;
3069 std::string line
, token
;
3070 std::getline(f
, line
);
3072 for (int i
= 0; i
< GetSize(line
); i
++) {
3073 if (in_comment
&& line
.compare(i
, 2, "*/") == 0) {
3079 if (!in_comment
&& line
.compare(i
, 2, "/*") == 0)
3087 token
= next_token(line
, " \t\r\n");
3088 if (token
.empty() || token
.compare(0, 2, "//") == 0)
3091 if (token
[0] == '@') {
3092 token
= token
.substr(1);
3093 const char *nptr
= token
.c_str();
3095 cursor
= strtol(nptr
, &endptr
, 16);
3096 if (!*nptr
|| *endptr
)
3097 log_file_error(filename
, location
.first_line
, "Can not parse address `%s` for %s.\n", nptr
, str
.c_str());
3101 AstNode
*value
= VERILOG_FRONTEND::const2ast(stringf("%d'%c", mem_width
, is_readmemh
? 'h' : 'b') + token
);
3103 if (unconditional_init
)
3105 if (meminit
== nullptr || cursor
!= next_meminit_cursor
)
3107 if (meminit
!= nullptr) {
3108 meminit
->children
[1] = AstNode::mkconst_bits(meminit_bits
, false);
3109 meminit
->children
[2] = AstNode::mkconst_int(meminit_size
, false);
3112 meminit
= new AstNode(AST_MEMINIT
);
3113 meminit
->children
.push_back(AstNode::mkconst_int(cursor
, false));
3114 meminit
->children
.push_back(nullptr);
3115 meminit
->children
.push_back(nullptr);
3116 meminit
->str
= memory
->str
;
3117 meminit
->id2ast
= memory
;
3118 meminit_bits
.clear();
3121 current_ast_mod
->children
.push_back(meminit
);
3122 next_meminit_cursor
= cursor
;
3126 next_meminit_cursor
++;
3127 meminit_bits
.insert(meminit_bits
.end(), value
->bits
.begin(), value
->bits
.end());
3132 block
->children
.push_back(new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
, new AstNode(AST_RANGE
, AstNode::mkconst_int(cursor
, false))), value
));
3133 block
->children
.back()->children
[0]->str
= memory
->str
;
3134 block
->children
.back()->children
[0]->id2ast
= memory
;
3135 block
->children
.back()->children
[0]->was_checked
= true;
3138 cursor
+= increment
;
3139 if ((cursor
== finish_addr
+increment
) || (increment
> 0 && cursor
> range_max
) || (increment
< 0 && cursor
< range_min
))
3143 if ((cursor
== finish_addr
+increment
) || (increment
> 0 && cursor
> range_max
) || (increment
< 0 && cursor
< range_min
))
3147 if (meminit
!= nullptr) {
3148 meminit
->children
[1] = AstNode::mkconst_bits(meminit_bits
, false);
3149 meminit
->children
[2] = AstNode::mkconst_int(meminit_size
, false);
3155 // annotate the names of all wires and other named objects in a generate block
3156 void AstNode::expand_genblock(std::string index_var
, std::string prefix
, std::map
<std::string
, std::string
> &name_map
)
3158 if (!index_var
.empty() && type
== AST_IDENTIFIER
&& str
== index_var
) {
3159 if (children
.empty()) {
3160 current_scope
[index_var
]->children
[0]->cloneInto(this);
3162 AstNode
*p
= new AstNode(AST_LOCALPARAM
, current_scope
[index_var
]->children
[0]->clone());
3163 p
->str
= stringf("$genval$%d", autoidx
++);
3164 current_ast_mod
->children
.push_back(p
);
3170 if ((type
== AST_IDENTIFIER
|| type
== AST_FCALL
|| type
== AST_TCALL
|| type
== AST_WIRETYPE
) && name_map
.count(str
) > 0)
3171 str
= name_map
[str
];
3173 std::map
<std::string
, std::string
> backup_name_map
;
3175 for (size_t i
= 0; i
< children
.size(); i
++) {
3176 AstNode
*child
= children
[i
];
3177 if (child
->type
== AST_WIRE
|| child
->type
== AST_MEMORY
|| child
->type
== AST_PARAMETER
|| child
->type
== AST_LOCALPARAM
||
3178 child
->type
== AST_FUNCTION
|| child
->type
== AST_TASK
|| child
->type
== AST_CELL
|| child
->type
== AST_TYPEDEF
|| child
->type
== AST_ENUM_ITEM
) {
3179 if (backup_name_map
.size() == 0)
3180 backup_name_map
= name_map
;
3181 std::string new_name
= prefix
[0] == '\\' ? prefix
.substr(1) : prefix
;
3182 size_t pos
= child
->str
.rfind('.');
3183 if (pos
== std::string::npos
)
3184 pos
= child
->str
[0] == '\\' && prefix
[0] == '\\' ? 1 : 0;
3187 new_name
= child
->str
.substr(0, pos
) + new_name
+ child
->str
.substr(pos
);
3188 if (new_name
[0] != '$' && new_name
[0] != '\\')
3189 new_name
= prefix
[0] + new_name
;
3190 name_map
[child
->str
] = new_name
;
3191 if (child
->type
== AST_FUNCTION
)
3192 replace_result_wire_name_in_function(child
, child
->str
, new_name
);
3194 child
->str
= new_name
;
3195 current_scope
[new_name
] = child
;
3197 if (child
->type
== AST_ENUM
){
3198 current_scope
[child
->str
] = child
;
3199 for (auto enode
: child
->children
){
3200 log_assert(enode
->type
== AST_ENUM_ITEM
);
3201 if (backup_name_map
.size() == 0)
3202 backup_name_map
= name_map
;
3203 std::string new_name
= prefix
[0] == '\\' ? prefix
.substr(1) : prefix
;
3204 size_t pos
= enode
->str
.rfind('.');
3205 if (pos
== std::string::npos
)
3206 pos
= enode
->str
[0] == '\\' && prefix
[0] == '\\' ? 1 : 0;
3209 new_name
= enode
->str
.substr(0, pos
) + new_name
+ enode
->str
.substr(pos
);
3210 if (new_name
[0] != '$' && new_name
[0] != '\\')
3211 new_name
= prefix
[0] + new_name
;
3212 name_map
[enode
->str
] = new_name
;
3214 enode
->str
= new_name
;
3215 current_scope
[new_name
] = enode
;
3220 for (size_t i
= 0; i
< children
.size(); i
++) {
3221 AstNode
*child
= children
[i
];
3222 // AST_PREFIX member names should not be prefixed; a nested AST_PREFIX
3223 // still needs to recursed-into
3224 if (type
== AST_PREFIX
&& i
== 1 && child
->type
== AST_IDENTIFIER
)
3226 if (child
->type
!= AST_FUNCTION
&& child
->type
!= AST_TASK
)
3227 child
->expand_genblock(index_var
, prefix
, name_map
);
3231 if (backup_name_map
.size() > 0)
3232 name_map
.swap(backup_name_map
);
3235 // rename stuff (used when tasks of functions are instantiated)
3236 void AstNode::replace_ids(const std::string
&prefix
, const std::map
<std::string
, std::string
> &rules
)
3238 if (type
== AST_BLOCK
)
3240 std::map
<std::string
, std::string
> new_rules
= rules
;
3241 std::string new_prefix
= prefix
+ str
;
3243 for (auto child
: children
)
3244 if (child
->type
== AST_WIRE
) {
3245 new_rules
[child
->str
] = new_prefix
+ child
->str
;
3246 child
->str
= new_prefix
+ child
->str
;
3249 for (auto child
: children
)
3250 if (child
->type
!= AST_WIRE
)
3251 child
->replace_ids(new_prefix
, new_rules
);
3255 if (type
== AST_IDENTIFIER
&& rules
.count(str
) > 0)
3256 str
= rules
.at(str
);
3257 for (auto child
: children
)
3258 child
->replace_ids(prefix
, rules
);
3262 // helper function for mem2reg_as_needed_pass1
3263 static void mark_memories_assign_lhs_complex(dict
<AstNode
*, pool
<std::string
>> &mem2reg_places
,
3264 dict
<AstNode
*, uint32_t> &mem2reg_candidates
, AstNode
*that
)
3266 for (auto &child
: that
->children
)
3267 mark_memories_assign_lhs_complex(mem2reg_places
, mem2reg_candidates
, child
);
3269 if (that
->type
== AST_IDENTIFIER
&& that
->id2ast
&& that
->id2ast
->type
== AST_MEMORY
) {
3270 AstNode
*mem
= that
->id2ast
;
3271 if (!(mem2reg_candidates
[mem
] & AstNode::MEM2REG_FL_CMPLX_LHS
))
3272 mem2reg_places
[mem
].insert(stringf("%s:%d", that
->filename
.c_str(), that
->location
.first_line
));
3273 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_CMPLX_LHS
;
3277 // find memories that should be replaced by registers
3278 void AstNode::mem2reg_as_needed_pass1(dict
<AstNode
*, pool
<std::string
>> &mem2reg_places
,
3279 dict
<AstNode
*, uint32_t> &mem2reg_candidates
, dict
<AstNode
*, uint32_t> &proc_flags
, uint32_t &flags
)
3281 uint32_t children_flags
= 0;
3282 int lhs_children_counter
= 0;
3284 if (type
== AST_TYPEDEF
)
3285 return; // don't touch content of typedefs
3287 if (type
== AST_ASSIGN
|| type
== AST_ASSIGN_LE
|| type
== AST_ASSIGN_EQ
)
3289 // mark all memories that are used in a complex expression on the left side of an assignment
3290 for (auto &lhs_child
: children
[0]->children
)
3291 mark_memories_assign_lhs_complex(mem2reg_places
, mem2reg_candidates
, lhs_child
);
3293 if (children
[0]->type
== AST_IDENTIFIER
&& children
[0]->id2ast
&& children
[0]->id2ast
->type
== AST_MEMORY
)
3295 AstNode
*mem
= children
[0]->id2ast
;
3297 // activate mem2reg if this is assigned in an async proc
3298 if (flags
& AstNode::MEM2REG_FL_ASYNC
) {
3299 if (!(mem2reg_candidates
[mem
] & AstNode::MEM2REG_FL_SET_ASYNC
))
3300 mem2reg_places
[mem
].insert(stringf("%s:%d", filename
.c_str(), location
.first_line
));
3301 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_SET_ASYNC
;
3304 // remember if this is assigned blocking (=)
3305 if (type
== AST_ASSIGN_EQ
) {
3306 if (!(proc_flags
[mem
] & AstNode::MEM2REG_FL_EQ1
))
3307 mem2reg_places
[mem
].insert(stringf("%s:%d", filename
.c_str(), location
.first_line
));
3308 proc_flags
[mem
] |= AstNode::MEM2REG_FL_EQ1
;
3311 // for proper (non-init) writes: remember if this is a constant index or not
3312 if ((flags
& MEM2REG_FL_INIT
) == 0) {
3313 if (children
[0]->children
.size() && children
[0]->children
[0]->type
== AST_RANGE
&& children
[0]->children
[0]->children
.size()) {
3314 if (children
[0]->children
[0]->children
[0]->type
== AST_CONSTANT
)
3315 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_CONST_LHS
;
3317 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_VAR_LHS
;
3321 // remember where this is
3322 if (flags
& MEM2REG_FL_INIT
) {
3323 if (!(mem2reg_candidates
[mem
] & AstNode::MEM2REG_FL_SET_INIT
))
3324 mem2reg_places
[mem
].insert(stringf("%s:%d", filename
.c_str(), location
.first_line
));
3325 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_SET_INIT
;
3327 if (!(mem2reg_candidates
[mem
] & AstNode::MEM2REG_FL_SET_ELSE
))
3328 mem2reg_places
[mem
].insert(stringf("%s:%d", filename
.c_str(), location
.first_line
));
3329 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_SET_ELSE
;
3333 lhs_children_counter
= 1;
3336 if (type
== AST_IDENTIFIER
&& id2ast
&& id2ast
->type
== AST_MEMORY
)
3338 AstNode
*mem
= id2ast
;
3340 // flag if used after blocking assignment (in same proc)
3341 if ((proc_flags
[mem
] & AstNode::MEM2REG_FL_EQ1
) && !(mem2reg_candidates
[mem
] & AstNode::MEM2REG_FL_EQ2
)) {
3342 mem2reg_places
[mem
].insert(stringf("%s:%d", filename
.c_str(), location
.first_line
));
3343 mem2reg_candidates
[mem
] |= AstNode::MEM2REG_FL_EQ2
;
3347 // also activate if requested, either by using mem2reg attribute or by declaring array as 'wire' instead of 'reg'
3348 if (type
== AST_MEMORY
&& (get_bool_attribute("\\mem2reg") || (flags
& AstNode::MEM2REG_FL_ALL
) || !is_reg
))
3349 mem2reg_candidates
[this] |= AstNode::MEM2REG_FL_FORCED
;
3351 if (type
== AST_MODULE
&& get_bool_attribute("\\mem2reg"))
3352 children_flags
|= AstNode::MEM2REG_FL_ALL
;
3354 dict
<AstNode
*, uint32_t> *proc_flags_p
= NULL
;
3356 if (type
== AST_ALWAYS
) {
3357 int count_edge_events
= 0;
3358 for (auto child
: children
)
3359 if (child
->type
== AST_POSEDGE
|| child
->type
== AST_NEGEDGE
)
3360 count_edge_events
++;
3361 if (count_edge_events
!= 1)
3362 children_flags
|= AstNode::MEM2REG_FL_ASYNC
;
3363 proc_flags_p
= new dict
<AstNode
*, uint32_t>;
3366 if (type
== AST_INITIAL
) {
3367 children_flags
|= AstNode::MEM2REG_FL_INIT
;
3368 proc_flags_p
= new dict
<AstNode
*, uint32_t>;
3371 uint32_t backup_flags
= flags
;
3372 flags
|= children_flags
;
3373 log_assert((flags
& ~0x000000ff) == 0);
3375 for (auto child
: children
)
3377 if (lhs_children_counter
> 0) {
3378 lhs_children_counter
--;
3379 if (child
->children
.size() && child
->children
[0]->type
== AST_RANGE
&& child
->children
[0]->children
.size()) {
3380 for (auto c
: child
->children
[0]->children
) {
3382 c
->mem2reg_as_needed_pass1(mem2reg_places
, mem2reg_candidates
, *proc_flags_p
, flags
);
3384 c
->mem2reg_as_needed_pass1(mem2reg_places
, mem2reg_candidates
, proc_flags
, flags
);
3389 child
->mem2reg_as_needed_pass1(mem2reg_places
, mem2reg_candidates
, *proc_flags_p
, flags
);
3391 child
->mem2reg_as_needed_pass1(mem2reg_places
, mem2reg_candidates
, proc_flags
, flags
);
3394 flags
&= ~children_flags
| backup_flags
;
3398 for (auto it
: *proc_flags_p
)
3399 log_assert((it
.second
& ~0xff000000) == 0);
3401 delete proc_flags_p
;
3405 bool AstNode::mem2reg_check(pool
<AstNode
*> &mem2reg_set
)
3407 if (type
!= AST_IDENTIFIER
|| !id2ast
|| !mem2reg_set
.count(id2ast
))
3410 if (children
.empty() || children
[0]->type
!= AST_RANGE
|| GetSize(children
[0]->children
) != 1)
3411 log_file_error(filename
, location
.first_line
, "Invalid array access.\n");
3416 void AstNode::mem2reg_remove(pool
<AstNode
*> &mem2reg_set
, vector
<AstNode
*> &delnodes
)
3418 log_assert(mem2reg_set
.count(this) == 0);
3420 if (mem2reg_set
.count(id2ast
))
3423 for (size_t i
= 0; i
< children
.size(); i
++) {
3424 if (mem2reg_set
.count(children
[i
]) > 0) {
3425 delnodes
.push_back(children
[i
]);
3426 children
.erase(children
.begin() + (i
--));
3428 children
[i
]->mem2reg_remove(mem2reg_set
, delnodes
);
3433 // actually replace memories with registers
3434 bool AstNode::mem2reg_as_needed_pass2(pool
<AstNode
*> &mem2reg_set
, AstNode
*mod
, AstNode
*block
, AstNode
*&async_block
)
3436 bool did_something
= false;
3438 if (type
== AST_BLOCK
)
3441 if (type
== AST_FUNCTION
|| type
== AST_TASK
)
3444 if (type
== AST_TYPEDEF
)
3447 if (type
== AST_MEMINIT
&& id2ast
&& mem2reg_set
.count(id2ast
))
3449 log_assert(children
[0]->type
== AST_CONSTANT
);
3450 log_assert(children
[1]->type
== AST_CONSTANT
);
3451 log_assert(children
[2]->type
== AST_CONSTANT
);
3453 int cursor
= children
[0]->asInt(false);
3454 Const data
= children
[1]->bitsAsConst();
3455 int length
= children
[2]->asInt(false);
3459 AstNode
*block
= new AstNode(AST_INITIAL
, new AstNode(AST_BLOCK
));
3460 mod
->children
.push_back(block
);
3461 block
= block
->children
[0];
3463 int wordsz
= GetSize(data
) / length
;
3465 for (int i
= 0; i
< length
; i
++) {
3466 block
->children
.push_back(new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
, new AstNode(AST_RANGE
, AstNode::mkconst_int(cursor
+i
, false))), mkconst_bits(data
.extract(i
*wordsz
, wordsz
).bits
, false)));
3467 block
->children
.back()->children
[0]->str
= str
;
3468 block
->children
.back()->children
[0]->id2ast
= id2ast
;
3469 block
->children
.back()->children
[0]->was_checked
= true;
3473 AstNode
*newNode
= new AstNode(AST_NONE
);
3474 newNode
->cloneInto(this);
3477 did_something
= true;
3480 if (type
== AST_ASSIGN
&& block
== NULL
&& children
[0]->mem2reg_check(mem2reg_set
))
3482 if (async_block
== NULL
) {
3483 async_block
= new AstNode(AST_ALWAYS
, new AstNode(AST_BLOCK
));
3484 mod
->children
.push_back(async_block
);
3487 AstNode
*newNode
= clone();
3488 newNode
->type
= AST_ASSIGN_EQ
;
3489 newNode
->children
[0]->was_checked
= true;
3490 async_block
->children
[0]->children
.push_back(newNode
);
3492 newNode
= new AstNode(AST_NONE
);
3493 newNode
->cloneInto(this);
3496 did_something
= true;
3499 if ((type
== AST_ASSIGN_LE
|| type
== AST_ASSIGN_EQ
) && children
[0]->mem2reg_check(mem2reg_set
) &&
3500 children
[0]->children
[0]->children
[0]->type
!= AST_CONSTANT
)
3502 std::stringstream sstr
;
3503 sstr
<< "$mem2reg_wr$" << children
[0]->str
<< "$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
3504 std::string id_addr
= sstr
.str() + "_ADDR", id_data
= sstr
.str() + "_DATA";
3506 int mem_width
, mem_size
, addr_bits
;
3507 bool mem_signed
= children
[0]->id2ast
->is_signed
;
3508 children
[0]->id2ast
->meminfo(mem_width
, mem_size
, addr_bits
);
3510 AstNode
*wire_addr
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(addr_bits
-1, true), mkconst_int(0, true)));
3511 wire_addr
->str
= id_addr
;
3512 wire_addr
->is_reg
= true;
3513 wire_addr
->was_checked
= true;
3514 wire_addr
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
3515 mod
->children
.push_back(wire_addr
);
3516 while (wire_addr
->simplify(true, false, false, 1, -1, false, false)) { }
3518 AstNode
*wire_data
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(mem_width
-1, true), mkconst_int(0, true)));
3519 wire_data
->str
= id_data
;
3520 wire_data
->is_reg
= true;
3521 wire_data
->was_checked
= true;
3522 wire_data
->is_signed
= mem_signed
;
3523 wire_data
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
3524 mod
->children
.push_back(wire_data
);
3525 while (wire_data
->simplify(true, false, false, 1, -1, false, false)) { }
3527 log_assert(block
!= NULL
);
3528 size_t assign_idx
= 0;
3529 while (assign_idx
< block
->children
.size() && block
->children
[assign_idx
] != this)
3531 log_assert(assign_idx
< block
->children
.size());
3533 AstNode
*assign_addr
= new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
), children
[0]->children
[0]->children
[0]->clone());
3534 assign_addr
->children
[0]->str
= id_addr
;
3535 assign_addr
->children
[0]->was_checked
= true;
3536 block
->children
.insert(block
->children
.begin()+assign_idx
+1, assign_addr
);
3538 AstNode
*case_node
= new AstNode(AST_CASE
, new AstNode(AST_IDENTIFIER
));
3539 case_node
->children
[0]->str
= id_addr
;
3540 for (int i
= 0; i
< mem_size
; i
++) {
3541 if (children
[0]->children
[0]->children
[0]->type
== AST_CONSTANT
&& int(children
[0]->children
[0]->children
[0]->integer
) != i
)
3543 AstNode
*cond_node
= new AstNode(AST_COND
, AstNode::mkconst_int(i
, false, addr_bits
), new AstNode(AST_BLOCK
));
3544 AstNode
*assign_reg
= new AstNode(type
, new AstNode(AST_IDENTIFIER
), new AstNode(AST_IDENTIFIER
));
3545 if (children
[0]->children
.size() == 2)
3546 assign_reg
->children
[0]->children
.push_back(children
[0]->children
[1]->clone());
3547 assign_reg
->children
[0]->str
= stringf("%s[%d]", children
[0]->str
.c_str(), i
);
3548 assign_reg
->children
[1]->str
= id_data
;
3549 cond_node
->children
[1]->children
.push_back(assign_reg
);
3550 case_node
->children
.push_back(cond_node
);
3552 block
->children
.insert(block
->children
.begin()+assign_idx
+2, case_node
);
3554 children
[0]->delete_children();
3555 children
[0]->range_valid
= false;
3556 children
[0]->id2ast
= NULL
;
3557 children
[0]->str
= id_data
;
3558 type
= AST_ASSIGN_EQ
;
3559 children
[0]->was_checked
= true;
3561 did_something
= true;
3564 if (mem2reg_check(mem2reg_set
))
3566 AstNode
*bit_part_sel
= NULL
;
3567 if (children
.size() == 2)
3568 bit_part_sel
= children
[1]->clone();
3570 if (children
[0]->children
[0]->type
== AST_CONSTANT
)
3572 int id
= children
[0]->children
[0]->integer
;
3573 str
= stringf("%s[%d]", str
.c_str(), id
);
3576 range_valid
= false;
3581 std::stringstream sstr
;
3582 sstr
<< "$mem2reg_rd$" << str
<< "$" << filename
<< ":" << location
.first_line
<< "$" << (autoidx
++);
3583 std::string id_addr
= sstr
.str() + "_ADDR", id_data
= sstr
.str() + "_DATA";
3585 int mem_width
, mem_size
, addr_bits
;
3586 bool mem_signed
= id2ast
->is_signed
;
3587 id2ast
->meminfo(mem_width
, mem_size
, addr_bits
);
3589 AstNode
*wire_addr
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(addr_bits
-1, true), mkconst_int(0, true)));
3590 wire_addr
->str
= id_addr
;
3591 wire_addr
->is_reg
= true;
3592 wire_addr
->was_checked
= true;
3594 wire_addr
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
3595 mod
->children
.push_back(wire_addr
);
3596 while (wire_addr
->simplify(true, false, false, 1, -1, false, false)) { }
3598 AstNode
*wire_data
= new AstNode(AST_WIRE
, new AstNode(AST_RANGE
, mkconst_int(mem_width
-1, true), mkconst_int(0, true)));
3599 wire_data
->str
= id_data
;
3600 wire_data
->is_reg
= true;
3601 wire_data
->was_checked
= true;
3602 wire_data
->is_signed
= mem_signed
;
3604 wire_data
->attributes
["\\nosync"] = AstNode::mkconst_int(1, false);
3605 mod
->children
.push_back(wire_data
);
3606 while (wire_data
->simplify(true, false, false, 1, -1, false, false)) { }
3608 AstNode
*assign_addr
= new AstNode(block
? AST_ASSIGN_EQ
: AST_ASSIGN
, new AstNode(AST_IDENTIFIER
), children
[0]->children
[0]->clone());
3609 assign_addr
->children
[0]->str
= id_addr
;
3610 assign_addr
->children
[0]->was_checked
= true;
3612 AstNode
*case_node
= new AstNode(AST_CASE
, new AstNode(AST_IDENTIFIER
));
3613 case_node
->children
[0]->str
= id_addr
;
3615 for (int i
= 0; i
< mem_size
; i
++) {
3616 if (children
[0]->children
[0]->type
== AST_CONSTANT
&& int(children
[0]->children
[0]->integer
) != i
)
3618 AstNode
*cond_node
= new AstNode(AST_COND
, AstNode::mkconst_int(i
, false, addr_bits
), new AstNode(AST_BLOCK
));
3619 AstNode
*assign_reg
= new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
), new AstNode(AST_IDENTIFIER
));
3620 assign_reg
->children
[0]->str
= id_data
;
3621 assign_reg
->children
[0]->was_checked
= true;
3622 assign_reg
->children
[1]->str
= stringf("%s[%d]", str
.c_str(), i
);
3623 cond_node
->children
[1]->children
.push_back(assign_reg
);
3624 case_node
->children
.push_back(cond_node
);
3627 std::vector
<RTLIL::State
> x_bits
;
3628 for (int i
= 0; i
< mem_width
; i
++)
3629 x_bits
.push_back(RTLIL::State::Sx
);
3631 AstNode
*cond_node
= new AstNode(AST_COND
, new AstNode(AST_DEFAULT
), new AstNode(AST_BLOCK
));
3632 AstNode
*assign_reg
= new AstNode(AST_ASSIGN_EQ
, new AstNode(AST_IDENTIFIER
), AstNode::mkconst_bits(x_bits
, false));
3633 assign_reg
->children
[0]->str
= id_data
;
3634 assign_reg
->children
[0]->was_checked
= true;
3635 cond_node
->children
[1]->children
.push_back(assign_reg
);
3636 case_node
->children
.push_back(cond_node
);
3640 size_t assign_idx
= 0;
3641 while (assign_idx
< block
->children
.size() && !block
->children
[assign_idx
]->contains(this))
3643 log_assert(assign_idx
< block
->children
.size());
3644 block
->children
.insert(block
->children
.begin()+assign_idx
, case_node
);
3645 block
->children
.insert(block
->children
.begin()+assign_idx
, assign_addr
);
3649 AstNode
*proc
= new AstNode(AST_ALWAYS
, new AstNode(AST_BLOCK
));
3650 proc
->children
[0]->children
.push_back(case_node
);
3651 mod
->children
.push_back(proc
);
3652 mod
->children
.push_back(assign_addr
);
3656 range_valid
= false;
3662 children
.push_back(bit_part_sel
);
3664 did_something
= true;
3667 log_assert(id2ast
== NULL
|| mem2reg_set
.count(id2ast
) == 0);
3669 auto children_list
= children
;
3670 for (size_t i
= 0; i
< children_list
.size(); i
++)
3671 if (children_list
[i
]->mem2reg_as_needed_pass2(mem2reg_set
, mod
, block
, async_block
))
3672 did_something
= true;
3674 return did_something
;
3677 // calculate memory dimensions
3678 void AstNode::meminfo(int &mem_width
, int &mem_size
, int &addr_bits
)
3680 log_assert(type
== AST_MEMORY
);
3682 mem_width
= children
[0]->range_left
- children
[0]->range_right
+ 1;
3683 mem_size
= children
[1]->range_left
- children
[1]->range_right
;
3687 mem_size
+= min(children
[1]->range_left
, children
[1]->range_right
) + 1;
3690 while ((1 << addr_bits
) < mem_size
)
3694 bool AstNode::has_const_only_constructs(bool &recommend_const_eval
)
3696 if (type
== AST_FOR
)
3697 recommend_const_eval
= true;
3698 if (type
== AST_WHILE
|| type
== AST_REPEAT
)
3700 if (type
== AST_FCALL
&& current_scope
.count(str
))
3701 if (current_scope
[str
]->has_const_only_constructs(recommend_const_eval
))
3703 for (auto child
: children
)
3704 if (child
->AstNode::has_const_only_constructs(recommend_const_eval
))
3709 bool AstNode::is_simple_const_expr()
3711 if (type
== AST_IDENTIFIER
)
3713 for (auto child
: children
)
3714 if (!child
->is_simple_const_expr())
3719 // helper function for AstNode::eval_const_function()
3720 void AstNode::replace_variables(std::map
<std::string
, AstNode::varinfo_t
> &variables
, AstNode
*fcall
)
3722 if (type
== AST_IDENTIFIER
&& variables
.count(str
)) {
3723 int offset
= variables
.at(str
).offset
, width
= variables
.at(str
).val
.bits
.size();
3724 if (!children
.empty()) {
3725 if (children
.size() != 1 || children
.at(0)->type
!= AST_RANGE
)
3726 log_file_error(filename
, location
.first_line
, "Memory access in constant function is not supported\n%s:%d.%d-%d.%d: ...called from here.\n",
3727 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3728 children
.at(0)->replace_variables(variables
, fcall
);
3729 while (simplify(true, false, false, 1, -1, false, true)) { }
3730 if (!children
.at(0)->range_valid
)
3731 log_file_error(filename
, location
.first_line
, "Non-constant range\n%s:%d.%d-%d.%d: ... called from here.\n",
3732 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3733 offset
= min(children
.at(0)->range_left
, children
.at(0)->range_right
);
3734 width
= min(std::abs(children
.at(0)->range_left
- children
.at(0)->range_right
) + 1, width
);
3736 offset
-= variables
.at(str
).offset
;
3737 std::vector
<RTLIL::State
> &var_bits
= variables
.at(str
).val
.bits
;
3738 std::vector
<RTLIL::State
> new_bits(var_bits
.begin() + offset
, var_bits
.begin() + offset
+ width
);
3739 AstNode
*newNode
= mkconst_bits(new_bits
, variables
.at(str
).is_signed
);
3740 newNode
->cloneInto(this);
3745 for (auto &child
: children
)
3746 child
->replace_variables(variables
, fcall
);
3749 // evaluate functions with all-const arguments
3750 AstNode
*AstNode::eval_const_function(AstNode
*fcall
)
3752 std::map
<std::string
, AstNode
*> backup_scope
;
3753 std::map
<std::string
, AstNode::varinfo_t
> variables
;
3754 AstNode
*block
= new AstNode(AST_BLOCK
);
3757 for (auto child
: children
)
3759 if (child
->type
== AST_WIRE
)
3761 while (child
->simplify(true, false, false, 1, -1, false, true)) { }
3762 if (!child
->range_valid
)
3763 log_file_error(child
->filename
, child
->location
.first_line
, "Can't determine size of variable %s\n%s:%d.%d-%d.%d: ... called from here.\n",
3764 child
->str
.c_str(), fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3765 variables
[child
->str
].val
= RTLIL::Const(RTLIL::State::Sx
, abs(child
->range_left
- child
->range_right
)+1);
3766 variables
[child
->str
].offset
= min(child
->range_left
, child
->range_right
);
3767 variables
[child
->str
].is_signed
= child
->is_signed
;
3768 if (child
->is_input
&& argidx
< fcall
->children
.size())
3769 variables
[child
->str
].val
= fcall
->children
.at(argidx
++)->bitsAsConst(variables
[child
->str
].val
.bits
.size());
3770 backup_scope
[child
->str
] = current_scope
[child
->str
];
3771 current_scope
[child
->str
] = child
;
3775 block
->children
.push_back(child
->clone());
3778 log_assert(variables
.count(str
) != 0);
3780 while (!block
->children
.empty())
3782 AstNode
*stmt
= block
->children
.front();
3785 log("-----------------------------------\n");
3786 for (auto &it
: variables
)
3787 log("%20s %40s\n", it
.first
.c_str(), log_signal(it
.second
.val
));
3788 stmt
->dumpAst(NULL
, "stmt> ");
3791 if (stmt
->type
== AST_ASSIGN_EQ
)
3793 if (stmt
->children
.at(0)->type
== AST_IDENTIFIER
&& stmt
->children
.at(0)->children
.size() != 0 &&
3794 stmt
->children
.at(0)->children
.at(0)->type
== AST_RANGE
)
3795 stmt
->children
.at(0)->children
.at(0)->replace_variables(variables
, fcall
);
3796 stmt
->children
.at(1)->replace_variables(variables
, fcall
);
3797 while (stmt
->simplify(true, false, false, 1, -1, false, true)) { }
3799 if (stmt
->type
!= AST_ASSIGN_EQ
)
3802 if (stmt
->children
.at(1)->type
!= AST_CONSTANT
)
3803 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Non-constant expression in constant function\n%s:%d.%d-%d.%d: ... called from here. X\n",
3804 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3806 if (stmt
->children
.at(0)->type
!= AST_IDENTIFIER
)
3807 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Unsupported composite left hand side in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3808 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3810 if (!variables
.count(stmt
->children
.at(0)->str
))
3811 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Assignment to non-local variable in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3812 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3814 if (stmt
->children
.at(0)->children
.empty()) {
3815 variables
[stmt
->children
.at(0)->str
].val
= stmt
->children
.at(1)->bitsAsConst(variables
[stmt
->children
.at(0)->str
].val
.bits
.size());
3817 AstNode
*range
= stmt
->children
.at(0)->children
.at(0);
3818 if (!range
->range_valid
)
3819 log_file_error(range
->filename
, range
->location
.first_line
, "Non-constant range\n%s:%d.%d-%d.%d: ... called from here.\n",
3820 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3821 int offset
= min(range
->range_left
, range
->range_right
);
3822 int width
= std::abs(range
->range_left
- range
->range_right
) + 1;
3823 varinfo_t
&v
= variables
[stmt
->children
.at(0)->str
];
3824 RTLIL::Const r
= stmt
->children
.at(1)->bitsAsConst(v
.val
.bits
.size());
3825 for (int i
= 0; i
< width
; i
++)
3826 v
.val
.bits
.at(i
+offset
-v
.offset
) = r
.bits
.at(i
);
3829 delete block
->children
.front();
3830 block
->children
.erase(block
->children
.begin());
3834 if (stmt
->type
== AST_FOR
)
3836 block
->children
.insert(block
->children
.begin(), stmt
->children
.at(0));
3837 stmt
->children
.at(3)->children
.push_back(stmt
->children
.at(2));
3838 stmt
->children
.erase(stmt
->children
.begin() + 2);
3839 stmt
->children
.erase(stmt
->children
.begin());
3840 stmt
->type
= AST_WHILE
;
3844 if (stmt
->type
== AST_WHILE
)
3846 AstNode
*cond
= stmt
->children
.at(0)->clone();
3847 cond
->replace_variables(variables
, fcall
);
3848 while (cond
->simplify(true, false, false, 1, -1, false, true)) { }
3850 if (cond
->type
!= AST_CONSTANT
)
3851 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Non-constant expression in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3852 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3854 if (cond
->asBool()) {
3855 block
->children
.insert(block
->children
.begin(), stmt
->children
.at(1)->clone());
3857 delete block
->children
.front();
3858 block
->children
.erase(block
->children
.begin());
3865 if (stmt
->type
== AST_REPEAT
)
3867 AstNode
*num
= stmt
->children
.at(0)->clone();
3868 num
->replace_variables(variables
, fcall
);
3869 while (num
->simplify(true, false, false, 1, -1, false, true)) { }
3871 if (num
->type
!= AST_CONSTANT
)
3872 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Non-constant expression in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3873 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3875 block
->children
.erase(block
->children
.begin());
3876 for (int i
= 0; i
< num
->bitsAsConst().as_int(); i
++)
3877 block
->children
.insert(block
->children
.begin(), stmt
->children
.at(1)->clone());
3884 if (stmt
->type
== AST_CASE
)
3886 AstNode
*expr
= stmt
->children
.at(0)->clone();
3887 expr
->replace_variables(variables
, fcall
);
3888 while (expr
->simplify(true, false, false, 1, -1, false, true)) { }
3890 AstNode
*sel_case
= NULL
;
3891 for (size_t i
= 1; i
< stmt
->children
.size(); i
++)
3893 bool found_match
= false;
3894 log_assert(stmt
->children
.at(i
)->type
== AST_COND
|| stmt
->children
.at(i
)->type
== AST_CONDX
|| stmt
->children
.at(i
)->type
== AST_CONDZ
);
3896 if (stmt
->children
.at(i
)->children
.front()->type
== AST_DEFAULT
) {
3897 sel_case
= stmt
->children
.at(i
)->children
.back();
3901 for (size_t j
= 0; j
+1 < stmt
->children
.at(i
)->children
.size() && !found_match
; j
++)
3903 AstNode
*cond
= stmt
->children
.at(i
)->children
.at(j
)->clone();
3904 cond
->replace_variables(variables
, fcall
);
3906 cond
= new AstNode(AST_EQ
, expr
->clone(), cond
);
3907 while (cond
->simplify(true, false, false, 1, -1, false, true)) { }
3909 if (cond
->type
!= AST_CONSTANT
)
3910 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Non-constant expression in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3911 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3913 found_match
= cond
->asBool();
3918 sel_case
= stmt
->children
.at(i
)->children
.back();
3923 block
->children
.erase(block
->children
.begin());
3925 block
->children
.insert(block
->children
.begin(), sel_case
->clone());
3931 if (stmt
->type
== AST_BLOCK
)
3933 block
->children
.erase(block
->children
.begin());
3934 block
->children
.insert(block
->children
.begin(), stmt
->children
.begin(), stmt
->children
.end());
3935 stmt
->children
.clear();
3940 log_file_error(stmt
->filename
, stmt
->location
.first_line
, "Unsupported language construct in constant function\n%s:%d.%d-%d.%d: ... called from here.\n",
3941 fcall
->filename
.c_str(), fcall
->location
.first_line
, fcall
->location
.first_column
, fcall
->location
.last_line
, fcall
->location
.last_column
);
3947 for (auto &it
: backup_scope
)
3948 if (it
.second
== NULL
)
3949 current_scope
.erase(it
.first
);
3951 current_scope
[it
.first
] = it
.second
;
3953 return AstNode::mkconst_bits(variables
.at(str
).val
.bits
, variables
.at(str
).is_signed
);
3956 void AstNode::allocateDefaultEnumValues()
3958 log_assert(type
==AST_ENUM
);
3959 int last_enum_int
= -1;
3960 for (auto node
: children
) {
3961 log_assert(node
->type
==AST_ENUM_ITEM
);
3962 node
->attributes
["\\enum_base_type"] = mkconst_str(str
);
3963 for (size_t i
= 0; i
< node
->children
.size(); i
++) {
3964 switch (node
->children
[i
]->type
) {
3966 // replace with auto-incremented constant
3967 delete node
->children
[i
];
3968 node
->children
[i
] = AstNode::mkconst_int(++last_enum_int
, true);
3971 // explicit constant (or folded expression)
3972 // TODO: can't extend 'x or 'z item
3973 last_enum_int
= node
->children
[i
]->integer
;
3979 // TODO: range check