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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* ---
*
* The Verilog frontend.
*
* This frontend is using the AST frontend library (see frontends/ast/).
* Thus this frontend does not generate RTLIL code directly but creates an
* AST directly from the Verilog parse tree and then passes this AST to
* the AST frontend library.
*
* ---
*
* This is the actual bison parser for Verilog code. The AST ist created directly
* from the bison reduce functions here. Note that this code uses a few global
* variables to hold the state of the AST generator and therefore this parser is
* not reentrant.
*
*/
%{
#include <list>
#include <string.h>
#include "frontends/verilog/verilog_frontend.h"
#include "kernel/log.h"
USING_YOSYS_NAMESPACE
using namespace AST;
using namespace VERILOG_FRONTEND;
YOSYS_NAMESPACE_BEGIN
namespace VERILOG_FRONTEND {
int port_counter;
std::map<std::string, int> port_stubs;
std::map<std::string, AstNode*> attr_list, default_attr_list;
std::map<std::string, AstNode*> *albuf;
std::vector<AstNode*> ast_stack;
struct AstNode *astbuf1, *astbuf2, *astbuf3;
struct AstNode *current_function_or_task;
struct AstNode *current_ast, *current_ast_mod;
int current_function_or_task_port_id;
std::vector<char> case_type_stack;
bool do_not_require_port_stubs;
bool default_nettype_wire;
bool sv_mode, formal_mode, lib_mode;
bool noassert_mode, noassume_mode, norestrict_mode;
bool assume_asserts_mode, assert_assumes_mode;
bool current_wire_rand, current_wire_const;
std::istream *lexin;
}
YOSYS_NAMESPACE_END
static void append_attr(AstNode *ast, std::map<std::string, AstNode*> *al)
{
for (auto &it : *al) {
if (ast->attributes.count(it.first) > 0)
delete ast->attributes[it.first];
ast->attributes[it.first] = it.second;
}
delete al;
}
static void append_attr_clone(AstNode *ast, std::map<std::string, AstNode*> *al)
{
for (auto &it : *al) {
if (ast->attributes.count(it.first) > 0)
delete ast->attributes[it.first];
ast->attributes[it.first] = it.second->clone();
}
}
static void free_attr(std::map<std::string, AstNode*> *al)
{
for (auto &it : *al)
delete it.second;
delete al;
}
%}
%name-prefix "frontend_verilog_yy"
%union {
std::string *string;
struct YOSYS_NAMESPACE_PREFIX AST::AstNode *ast;
std::map<std::string, YOSYS_NAMESPACE_PREFIX AST::AstNode*> *al;
bool boolean;
}
%token <string> TOK_STRING TOK_ID TOK_CONSTVAL TOK_REALVAL TOK_PRIMITIVE
%token ATTR_BEGIN ATTR_END DEFATTR_BEGIN DEFATTR_END
%token TOK_MODULE TOK_ENDMODULE TOK_PARAMETER TOK_LOCALPARAM TOK_DEFPARAM
%token TOK_PACKAGE TOK_ENDPACKAGE TOK_PACKAGESEP
%token TOK_INPUT TOK_OUTPUT TOK_INOUT TOK_WIRE TOK_REG TOK_LOGIC
%token TOK_INTEGER TOK_SIGNED TOK_ASSIGN TOK_ALWAYS TOK_INITIAL
%token TOK_BEGIN TOK_END TOK_IF TOK_ELSE TOK_FOR TOK_WHILE TOK_REPEAT
%token TOK_DPI_FUNCTION TOK_POSEDGE TOK_NEGEDGE TOK_OR TOK_AUTOMATIC
%token TOK_CASE TOK_CASEX TOK_CASEZ TOK_ENDCASE TOK_DEFAULT
%token TOK_FUNCTION TOK_ENDFUNCTION TOK_TASK TOK_ENDTASK TOK_SPECIFY TOK_ENDSPECIFY TOK_SPECPARAM
%token TOK_GENERATE TOK_ENDGENERATE TOK_GENVAR TOK_REAL
%token TOK_SYNOPSYS_FULL_CASE TOK_SYNOPSYS_PARALLEL_CASE
%token TOK_SUPPLY0 TOK_SUPPLY1 TOK_TO_SIGNED TOK_TO_UNSIGNED
%token TOK_POS_INDEXED TOK_NEG_INDEXED TOK_ASSERT TOK_ASSUME
%token TOK_RESTRICT TOK_COVER TOK_PROPERTY TOK_ENUM TOK_TYPEDEF
%token TOK_RAND TOK_CONST TOK_CHECKER TOK_ENDCHECKER TOK_EVENTUALLY
%token TOK_INCREMENT TOK_DECREMENT TOK_UNIQUE TOK_PRIORITY
%type <ast> range range_or_multirange non_opt_range non_opt_multirange range_or_signed_int
%type <ast> wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list
%type <string> opt_label tok_prim_wrapper hierarchical_id
%type <boolean> opt_signed unique_case_attr
%type <al> attr case_attr
// operator precedence from low to high
%left OP_LOR
%left OP_LAND
%left '|' OP_NOR
%left '^' OP_XNOR
%left '&' OP_NAND
%left OP_EQ OP_NE OP_EQX OP_NEX
%left '<' OP_LE OP_GE '>'
%left OP_SHL OP_SHR OP_SSHL OP_SSHR
%left '+' '-'
%left '*' '/' '%'
%left OP_POW
%right UNARY_OPS
%define parse.error verbose
%define parse.lac full
%nonassoc FAKE_THEN
%nonassoc TOK_ELSE
%debug
%%
input: {
ast_stack.clear();
ast_stack.push_back(current_ast);
} design {
ast_stack.pop_back();
log_assert(GetSize(ast_stack) == 0);
for (auto &it : default_attr_list)
delete it.second;
default_attr_list.clear();
};
design:
module design |
defattr design |
task_func_decl design |
param_decl design |
localparam_decl design |
package design |
/* empty */;
attr:
{
for (auto &it : attr_list)
delete it.second;
attr_list.clear();
for (auto &it : default_attr_list)
attr_list[it.first] = it.second->clone();
} attr_opt {
std::map<std::string, AstNode*> *al = new std::map<std::string, AstNode*>;
al->swap(attr_list);
$$ = al;
};
attr_opt:
attr_opt ATTR_BEGIN opt_attr_list ATTR_END |
/* empty */;
defattr:
DEFATTR_BEGIN {
for (auto &it : default_attr_list)
delete it.second;
default_attr_list.clear();
for (auto &it : attr_list)
delete it.second;
attr_list.clear();
} opt_attr_list {
default_attr_list = attr_list;
attr_list.clear();
} DEFATTR_END;
opt_attr_list:
attr_list | /* empty */;
attr_list:
attr_assign |
attr_list ',' attr_assign;
attr_assign:
hierarchical_id {
if (attr_list.count(*$1) != 0)
delete attr_list[*$1];
attr_list[*$1] = AstNode::mkconst_int(1, false);
delete $1;
} |
hierarchical_id '=' expr {
if (attr_list.count(*$1) != 0)
delete attr_list[*$1];
attr_list[*$1] = $3;
delete $1;
};
hierarchical_id:
TOK_ID {
$$ = $1;
} |
hierarchical_id TOK_PACKAGESEP TOK_ID {
if ($3->substr(0, 1) == "\\")
*$1 += "::" + $3->substr(1);
else
*$1 += "::" + *$3;
delete $3;
$$ = $1;
} |
hierarchical_id '.' TOK_ID {
if ($3->substr(0, 1) == "\\")
*$1 += "." + $3->substr(1);
else
*$1 += "." + *$3;
delete $3;
$$ = $1;
};
module:
attr TOK_MODULE TOK_ID {
do_not_require_port_stubs = false;
AstNode *mod = new AstNode(AST_MODULE);
ast_stack.back()->children.push_back(mod);
ast_stack.push_back(mod);
current_ast_mod = mod;
port_stubs.clear();
port_counter = 0;
mod->str = *$3;
append_attr(mod, $1);
delete $3;
} module_para_opt module_args_opt ';' module_body TOK_ENDMODULE {
if (port_stubs.size() != 0)
frontend_verilog_yyerror("Missing details for module port `%s'.",
port_stubs.begin()->first.c_str());
ast_stack.pop_back();
log_assert(ast_stack.size() == 1);
current_ast_mod = NULL;
};
module_para_opt:
'#' '(' { astbuf1 = nullptr; } module_para_list { if (astbuf1) delete astbuf1; } ')' | /* empty */;
module_para_list:
single_module_para | module_para_list ',' single_module_para;
single_module_para:
/* empty */ |
TOK_PARAMETER {
if (astbuf1) delete astbuf1;
astbuf1 = new AstNode(AST_PARAMETER);
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
} param_signed param_integer param_range single_param_decl |
TOK_LOCALPARAM {
if (astbuf1) delete astbuf1;
astbuf1 = new AstNode(AST_LOCALPARAM);
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
} param_signed param_integer param_range single_param_decl |
single_param_decl;
module_args_opt:
'(' ')' | /* empty */ | '(' module_args optional_comma ')';
module_args:
module_arg | module_args ',' module_arg;
optional_comma:
',' | /* empty */;
module_arg_opt_assignment:
'=' expr {
if (ast_stack.back()->children.size() > 0 && ast_stack.back()->children.back()->type == AST_WIRE) {
AstNode *wire = new AstNode(AST_IDENTIFIER);
wire->str = ast_stack.back()->children.back()->str;
if (ast_stack.back()->children.back()->is_reg)
ast_stack.back()->children.push_back(new AstNode(AST_INITIAL, new AstNode(AST_BLOCK, new AstNode(AST_ASSIGN_LE, wire, $2))));
else
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, wire, $2));
} else
frontend_verilog_yyerror("Syntax error.");
} |
/* empty */;
module_arg:
TOK_ID {
if (ast_stack.back()->children.size() > 0 && ast_stack.back()->children.back()->type == AST_WIRE) {
AstNode *node = ast_stack.back()->children.back()->clone();
node->str = *$1;
node->port_id = ++port_counter;
ast_stack.back()->children.push_back(node);
} else {
if (port_stubs.count(*$1) != 0)
frontend_verilog_yyerror("Duplicate module port `%s'.", $1->c_str());
port_stubs[*$1] = ++port_counter;
}
delete $1;
} module_arg_opt_assignment |
attr wire_type range TOK_ID {
AstNode *node = $2;
node->str = *$4;
node->port_id = ++port_counter;
if ($3 != NULL)
node->children.push_back($3);
if (!node->is_input && !node->is_output)
frontend_verilog_yyerror("Module port `%s' is neither input nor output.", $4->c_str());
if (node->is_reg && node->is_input && !node->is_output && !sv_mode)
frontend_verilog_yyerror("Input port `%s' is declared as register.", $4->c_str());
ast_stack.back()->children.push_back(node);
append_attr(node, $1);
delete $4;
} module_arg_opt_assignment |
'.' '.' '.' {
do_not_require_port_stubs = true;
};
package:
attr TOK_PACKAGE TOK_ID {
AstNode *mod = new AstNode(AST_PACKAGE);
ast_stack.back()->children.push_back(mod);
ast_stack.push_back(mod);
current_ast_mod = mod;
mod->str = *$3;
append_attr(mod, $1);
} ';' package_body TOK_ENDPACKAGE {
ast_stack.pop_back();
current_ast_mod = NULL;
};
package_body:
package_body package_body_stmt |;
package_body_stmt:
localparam_decl;
non_opt_delay:
'#' TOK_ID { delete $2; } |
'#' TOK_CONSTVAL { delete $2; } |
'#' TOK_REALVAL { delete $2; } |
'#' '(' expr ')' { delete $3; } |
'#' '(' expr ':' expr ':' expr ')' { delete $3; delete $5; delete $7; };
delay:
non_opt_delay | /* empty */;
wire_type:
{
astbuf3 = new AstNode(AST_WIRE);
current_wire_rand = false;
current_wire_const = false;
} wire_type_token_list delay {
$$ = astbuf3;
};
wire_type_token_list:
wire_type_token | wire_type_token_list wire_type_token |
wire_type_token_io ;
wire_type_token_io:
TOK_INPUT {
astbuf3->is_input = true;
} |
TOK_OUTPUT {
astbuf3->is_output = true;
} |
TOK_INOUT {
astbuf3->is_input = true;
astbuf3->is_output = true;
};
wire_type_token:
TOK_WIRE {
} |
TOK_REG {
astbuf3->is_reg = true;
} |
TOK_LOGIC {
astbuf3->is_logic = true;
} |
TOK_INTEGER {
astbuf3->is_reg = true;
astbuf3->range_left = 31;
astbuf3->range_right = 0;
astbuf3->is_signed = true;
} |
TOK_GENVAR {
astbuf3->type = AST_GENVAR;
astbuf3->is_reg = true;
astbuf3->range_left = 31;
astbuf3->range_right = 0;
} |
TOK_SIGNED {
astbuf3->is_signed = true;
} |
TOK_RAND {
current_wire_rand = true;
} |
TOK_CONST {
current_wire_const = true;
};
non_opt_range:
'[' expr ':' expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back($2);
$$->children.push_back($4);
} |
'[' expr TOK_POS_INDEXED expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), $4), AstNode::mkconst_int(1, true)));
$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
} |
'[' expr TOK_NEG_INDEXED expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back(new AstNode(AST_ADD, $2, AstNode::mkconst_int(0, true)));
$$->children.push_back(new AstNode(AST_SUB, new AstNode(AST_ADD, $2->clone(), AstNode::mkconst_int(1, true)), $4));
} |
'[' expr ']' {
$$ = new AstNode(AST_RANGE);
$$->children.push_back($2);
};
non_opt_multirange:
non_opt_range non_opt_range {
$$ = new AstNode(AST_MULTIRANGE, $1, $2);
} |
non_opt_multirange non_opt_range {
$$ = $1;
$$->children.push_back($2);
};
range:
non_opt_range {
$$ = $1;
} |
/* empty */ {
$$ = NULL;
};
range_or_multirange:
range { $$ = $1; } |
non_opt_multirange { $$ = $1; };
range_or_signed_int:
range {
$$ = $1;
} |
TOK_INTEGER {
$$ = new AstNode(AST_RANGE);
$$->children.push_back(AstNode::mkconst_int(31, true));
$$->children.push_back(AstNode::mkconst_int(0, true));
$$->is_signed = true;
};
module_body:
module_body module_body_stmt |
/* the following line makes the generate..endgenrate keywords optional */
module_body gen_stmt |
/* empty */;
module_body_stmt:
task_func_decl | specify_block |param_decl | localparam_decl | defparam_decl | specparam_declaration | wire_decl | assign_stmt | cell_stmt |
always_stmt | TOK_GENERATE module_gen_body TOK_ENDGENERATE | defattr | assert_property | checker_decl;
checker_decl:
TOK_CHECKER TOK_ID ';' {
AstNode *node = new AstNode(AST_GENBLOCK);
node->str = *$2;
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} module_body TOK_ENDCHECKER {
delete $2;
ast_stack.pop_back();
};
task_func_decl:
attr TOK_DPI_FUNCTION TOK_ID TOK_ID {
current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$3), AstNode::mkconst_str(*$4));
current_function_or_task->str = *$4;
append_attr(current_function_or_task, $1);
ast_stack.back()->children.push_back(current_function_or_task);
delete $3;
delete $4;
} opt_dpi_function_args ';' {
current_function_or_task = NULL;
} |
attr TOK_DPI_FUNCTION TOK_ID '=' TOK_ID TOK_ID {
current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$5), AstNode::mkconst_str(*$3));
current_function_or_task->str = *$6;
append_attr(current_function_or_task, $1);
ast_stack.back()->children.push_back(current_function_or_task);
delete $3;
delete $5;
delete $6;
} opt_dpi_function_args ';' {
current_function_or_task = NULL;
} |
attr TOK_DPI_FUNCTION TOK_ID ':' TOK_ID '=' TOK_ID TOK_ID {
current_function_or_task = new AstNode(AST_DPI_FUNCTION, AstNode::mkconst_str(*$7), AstNode::mkconst_str(*$3 + ":" + RTLIL::unescape_id(*$5)));
current_function_or_task->str = *$8;
append_attr(current_function_or_task, $1);
ast_stack.back()->children.push_back(current_function_or_task);
delete $3;
delete $5;
delete $7;
delete $8;
} opt_dpi_function_args ';' {
current_function_or_task = NULL;
} |
attr TOK_TASK opt_automatic TOK_ID {
current_function_or_task = new AstNode(AST_TASK);
current_function_or_task->str = *$4;
append_attr(current_function_or_task, $1);
ast_stack.back()->children.push_back(current_function_or_task);
ast_stack.push_back(current_function_or_task);
current_function_or_task_port_id = 1;
delete $4;
} task_func_args_opt ';' task_func_body TOK_ENDTASK {
current_function_or_task = NULL;
ast_stack.pop_back();
} |
attr TOK_FUNCTION opt_automatic opt_signed range_or_signed_int TOK_ID {
current_function_or_task = new AstNode(AST_FUNCTION);
current_function_or_task->str = *$6;
append_attr(current_function_or_task, $1);
ast_stack.back()->children.push_back(current_function_or_task);
ast_stack.push_back(current_function_or_task);
AstNode *outreg = new AstNode(AST_WIRE);
outreg->str = *$6;
outreg->is_signed = $4;
outreg->is_reg = true;
if ($5 != NULL) {
outreg->children.push_back($5);
outreg->is_signed = $4 || $5->is_signed;
$5->is_signed = false;
}
current_function_or_task->children.push_back(outreg);
current_function_or_task_port_id = 1;
delete $6;
} task_func_args_opt ';' task_func_body TOK_ENDFUNCTION {
current_function_or_task = NULL;
ast_stack.pop_back();
};
dpi_function_arg:
TOK_ID TOK_ID {
current_function_or_task->children.push_back(AstNode::mkconst_str(*$1));
delete $1;
delete $2;
} |
TOK_ID {
current_function_or_task->children.push_back(AstNode::mkconst_str(*$1));
delete $1;
};
opt_dpi_function_args:
'(' dpi_function_args ')' |
/* empty */;
dpi_function_args:
dpi_function_args ',' dpi_function_arg |
dpi_function_args ',' |
dpi_function_arg |
/* empty */;
opt_automatic:
TOK_AUTOMATIC |
/* empty */;
opt_signed:
TOK_SIGNED {
$$ = true;
} |
/* empty */ {
$$ = false;
};
task_func_args_opt:
'(' ')' | /* empty */ | '(' {
albuf = nullptr;
astbuf1 = nullptr;
astbuf2 = nullptr;
} task_func_args optional_comma {
delete astbuf1;
if (astbuf2 != NULL)
delete astbuf2;
free_attr(albuf);
} ')';
task_func_args:
task_func_port | task_func_args ',' task_func_port;
task_func_port:
attr wire_type range {
if (albuf) {
delete astbuf1;
if (astbuf2 != NULL)
delete astbuf2;
free_attr(albuf);
}
albuf = $1;
astbuf1 = $2;
astbuf2 = $3;
if (astbuf1->range_left >= 0 && astbuf1->range_right >= 0) {
if (astbuf2) {
frontend_verilog_yyerror("Syntax error.");
} else {
astbuf2 = new AstNode(AST_RANGE);
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_left, true));
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_right, true));
}
}
if (astbuf2 && astbuf2->children.size() != 2)
frontend_verilog_yyerror("Syntax error.");
} wire_name | wire_name;
task_func_body:
task_func_body behavioral_stmt |
/* empty */;
specify_block:
TOK_SPECIFY specify_item_opt TOK_ENDSPECIFY |
TOK_SPECIFY TOK_ENDSPECIFY ;
specify_item_opt:
specify_item_opt specify_item |
specify_item ;
specify_item:
specparam_declaration
// | pulsestyle_declaration
// | showcancelled_declaration
| path_declaration
| system_timing_declaration
;
specparam_declaration:
TOK_SPECPARAM list_of_specparam_assignments ';' |
TOK_SPECPARAM specparam_range list_of_specparam_assignments ';' ;
// IEEE 1364-2005 calls this sinmply 'range' but the current 'range' rule allows empty match
// and the 'non_opt_range' rule allows index ranges not allowed by 1364-2005
// exxxxtending this for SV specparam would change this anyhow
specparam_range:
'[' constant_expression ':' constant_expression ']' ;
list_of_specparam_assignments:
specparam_assignment | list_of_specparam_assignments ',' specparam_assignment;
specparam_assignment:
TOK_ID '=' constant_mintypmax_expression ;
/*
pulsestyle_declaration :
;
showcancelled_declaration :
;
*/
path_declaration :
simple_path_declaration ';'
// | edge_sensitive_path_declaration
// | state_dependent_path_declaration
;
simple_path_declaration :
parallel_path_description '=' path_delay_value |
full_path_description '=' path_delay_value
;
path_delay_value :
'(' path_delay_expression list_of_path_delay_extra_expressions ')'
| path_delay_expression
| path_delay_expression list_of_path_delay_extra_expressions
;
list_of_path_delay_extra_expressions :
/*
t_path_delay_expression
| trise_path_delay_expression ',' tfall_path_delay_expression
| trise_path_delay_expression ',' tfall_path_delay_expression ',' tz_path_delay_expression
| t01_path_delay_expression ',' t10_path_delay_expression ',' t0z_path_delay_expression ','
tz1_path_delay_expression ',' t1z_path_delay_expression ',' tz0_path_delay_expression
| t01_path_delay_expression ',' t10_path_delay_expression ',' t0z_path_delay_expression ','
tz1_path_delay_expression ',' t1z_path_delay_expression ',' tz0_path_delay_expression ','
t0x_path_delay_expression ',' tx1_path_delay_expression ',' t1x_path_delay_expression ','
tx0_path_delay_expression ',' txz_path_delay_expression ',' tzx_path_delay_expression
*/
',' path_delay_expression
| ',' path_delay_expression ',' path_delay_expression
| ',' path_delay_expression ',' path_delay_expression ','
path_delay_expression ',' path_delay_expression ',' path_delay_expression
| ',' path_delay_expression ',' path_delay_expression ','
path_delay_expression ',' path_delay_expression ',' path_delay_expression ','
path_delay_expression ',' path_delay_expression ',' path_delay_expression ','
path_delay_expression ',' path_delay_expression ',' path_delay_expression
;
parallel_path_description :
'(' specify_input_terminal_descriptor opt_polarity_operator '=' '>' specify_output_terminal_descriptor ')' ;
full_path_description :
'(' list_of_path_inputs '*' '>' list_of_path_outputs ')' ;
// This was broken into 2 rules to solve shift/reduce conflicts
list_of_path_inputs :
specify_input_terminal_descriptor opt_polarity_operator |
specify_input_terminal_descriptor more_path_inputs opt_polarity_operator ;
more_path_inputs :
',' specify_input_terminal_descriptor |
more_path_inputs ',' specify_input_terminal_descriptor ;
list_of_path_outputs :
specify_output_terminal_descriptor |
list_of_path_outputs ',' specify_output_terminal_descriptor ;
opt_polarity_operator :
'+'
| '-'
| ;
// Good enough for the time being
specify_input_terminal_descriptor :
TOK_ID ;
// Good enough for the time being
specify_output_terminal_descriptor :
TOK_ID ;
system_timing_declaration :
TOK_ID '(' system_timing_args ')' ';' ;
system_timing_arg :
TOK_POSEDGE TOK_ID |
TOK_NEGEDGE TOK_ID |
expr ;
system_timing_args :
system_timing_arg |
system_timing_args ',' system_timing_arg ;
/*
t_path_delay_expression :
path_delay_expression;
trise_path_delay_expression :
path_delay_expression;
tfall_path_delay_expression :
path_delay_expression;
tz_path_delay_expression :
path_delay_expression;
t01_path_delay_expression :
path_delay_expression;
t10_path_delay_expression :
path_delay_expression;
t0z_path_delay_expression :
path_delay_expression;
tz1_path_delay_expression :
path_delay_expression;
t1z_path_delay_expression :
path_delay_expression;
tz0_path_delay_expression :
path_delay_expression;
t0x_path_delay_expression :
path_delay_expression;
tx1_path_delay_expression :
path_delay_expression;
t1x_path_delay_expression :
path_delay_expression;
tx0_path_delay_expression :
path_delay_expression;
txz_path_delay_expression :
path_delay_expression;
tzx_path_delay_expression :
path_delay_expression;
*/
path_delay_expression :
constant_expression;
constant_mintypmax_expression :
constant_expression
| constant_expression ':' constant_expression ':' constant_expression
;
// for the time being this is OK, but we may write our own expr here.
// as I'm not sure it is legal to use a full expr here (probably not)
// On the other hand, other rules requiring constant expressions also use 'expr'
// (such as param assignment), so we may leave this as-is, perhaps assing runtime checks for constant-ness
constant_expression:
expr ;
param_signed:
TOK_SIGNED {
astbuf1->is_signed = true;
} | /* empty */;
param_integer:
TOK_INTEGER {
if (astbuf1->children.size() != 1)
frontend_verilog_yyerror("Syntax error.");
astbuf1->children.push_back(new AstNode(AST_RANGE));
astbuf1->children.back()->children.push_back(AstNode::mkconst_int(31, true));
astbuf1->children.back()->children.push_back(AstNode::mkconst_int(0, true));
astbuf1->is_signed = true;
} | /* empty */;
param_real:
TOK_REAL {
if (astbuf1->children.size() != 1)
frontend_verilog_yyerror("Syntax error.");
astbuf1->children.push_back(new AstNode(AST_REALVALUE));
} | /* empty */;
param_range:
range {
if ($1 != NULL) {
if (astbuf1->children.size() != 1)
frontend_verilog_yyerror("Syntax error.");
astbuf1->children.push_back($1);
}
};
param_decl:
TOK_PARAMETER {
astbuf1 = new AstNode(AST_PARAMETER);
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
} param_signed param_integer param_real param_range param_decl_list ';' {
delete astbuf1;
};
localparam_decl:
TOK_LOCALPARAM {
astbuf1 = new AstNode(AST_LOCALPARAM);
astbuf1->children.push_back(AstNode::mkconst_int(0, true));
} param_signed param_integer param_real param_range param_decl_list ';' {
delete astbuf1;
};
param_decl_list:
single_param_decl | param_decl_list ',' single_param_decl;
single_param_decl:
TOK_ID '=' expr {
AstNode *node;
if (astbuf1 == nullptr) {
if (!sv_mode)
frontend_verilog_yyerror("syntax error");
node = new AstNode(AST_PARAMETER);
node->children.push_back(AstNode::mkconst_int(0, true));
} else {
node = astbuf1->clone();
}
node->str = *$1;
delete node->children[0];
node->children[0] = $3;
ast_stack.back()->children.push_back(node);
delete $1;
};
defparam_decl:
TOK_DEFPARAM defparam_decl_list ';';
defparam_decl_list:
single_defparam_decl | defparam_decl_list ',' single_defparam_decl;
single_defparam_decl:
range rvalue '=' expr {
AstNode *node = new AstNode(AST_DEFPARAM);
node->children.push_back($2);
node->children.push_back($4);
if ($1 != NULL)
node->children.push_back($1);
ast_stack.back()->children.push_back(node);
};
wire_decl:
attr wire_type range {
albuf = $1;
astbuf1 = $2;
astbuf2 = $3;
if (astbuf1->range_left >= 0 && astbuf1->range_right >= 0) {
if (astbuf2) {
frontend_verilog_yyerror("Syntax error.");
} else {
astbuf2 = new AstNode(AST_RANGE);
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_left, true));
astbuf2->children.push_back(AstNode::mkconst_int(astbuf1->range_right, true));
}
}
if (astbuf2 && astbuf2->children.size() != 2)
frontend_verilog_yyerror("Syntax error.");
} wire_name_list {
delete astbuf1;
if (astbuf2 != NULL)
delete astbuf2;
free_attr(albuf);
} ';' |
attr TOK_SUPPLY0 TOK_ID {
ast_stack.back()->children.push_back(new AstNode(AST_WIRE));
ast_stack.back()->children.back()->str = *$3;
append_attr(ast_stack.back()->children.back(), $1);
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, new AstNode(AST_IDENTIFIER), AstNode::mkconst_int(0, false, 1)));
ast_stack.back()->children.back()->children[0]->str = *$3;
delete $3;
} opt_supply_wires ';' |
attr TOK_SUPPLY1 TOK_ID {
ast_stack.back()->children.push_back(new AstNode(AST_WIRE));
ast_stack.back()->children.back()->str = *$3;
append_attr(ast_stack.back()->children.back(), $1);
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, new AstNode(AST_IDENTIFIER), AstNode::mkconst_int(1, false, 1)));
ast_stack.back()->children.back()->children[0]->str = *$3;
delete $3;
} opt_supply_wires ';';
opt_supply_wires:
/* empty */ |
opt_supply_wires ',' TOK_ID {
AstNode *wire_node = ast_stack.back()->children.at(GetSize(ast_stack.back()->children)-2)->clone();
AstNode *assign_node = ast_stack.back()->children.at(GetSize(ast_stack.back()->children)-1)->clone();
wire_node->str = *$3;
assign_node->children[0]->str = *$3;
ast_stack.back()->children.push_back(wire_node);
ast_stack.back()->children.push_back(assign_node);
delete $3;
};
wire_name_list:
wire_name_and_opt_assign | wire_name_list ',' wire_name_and_opt_assign;
wire_name_and_opt_assign:
wire_name {
bool attr_anyconst = false;
bool attr_anyseq = false;
bool attr_allconst = false;
bool attr_allseq = false;
if (ast_stack.back()->children.back()->get_bool_attribute("\\anyconst")) {
delete ast_stack.back()->children.back()->attributes.at("\\anyconst");
ast_stack.back()->children.back()->attributes.erase("\\anyconst");
attr_anyconst = true;
}
if (ast_stack.back()->children.back()->get_bool_attribute("\\anyseq")) {
delete ast_stack.back()->children.back()->attributes.at("\\anyseq");
ast_stack.back()->children.back()->attributes.erase("\\anyseq");
attr_anyseq = true;
}
if (ast_stack.back()->children.back()->get_bool_attribute("\\allconst")) {
delete ast_stack.back()->children.back()->attributes.at("\\allconst");
ast_stack.back()->children.back()->attributes.erase("\\allconst");
attr_allconst = true;
}
if (ast_stack.back()->children.back()->get_bool_attribute("\\allseq")) {
delete ast_stack.back()->children.back()->attributes.at("\\allseq");
ast_stack.back()->children.back()->attributes.erase("\\allseq");
attr_allseq = true;
}
if (current_wire_rand || attr_anyconst || attr_anyseq || attr_allconst || attr_allseq) {
AstNode *wire = new AstNode(AST_IDENTIFIER);
AstNode *fcall = new AstNode(AST_FCALL);
wire->str = ast_stack.back()->children.back()->str;
fcall->str = current_wire_const ? "\\$anyconst" : "\\$anyseq";
if (attr_anyconst)
fcall->str = "\\$anyconst";
if (attr_anyseq)
fcall->str = "\\$anyseq";
if (attr_allconst)
fcall->str = "\\$allconst";
if (attr_allseq)
fcall->str = "\\$allseq";
fcall->attributes["\\reg"] = AstNode::mkconst_str(RTLIL::unescape_id(wire->str));
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, wire, fcall));
}
} |
wire_name '=' expr {
AstNode *wire = new AstNode(AST_IDENTIFIER);
wire->str = ast_stack.back()->children.back()->str;
if (astbuf1->is_reg)
ast_stack.back()->children.push_back(new AstNode(AST_INITIAL, new AstNode(AST_BLOCK, new AstNode(AST_ASSIGN_LE, wire, $3))));
else
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, wire, $3));
};
wire_name:
TOK_ID range_or_multirange {
if (astbuf1 == nullptr)
frontend_verilog_yyerror("Syntax error.");
AstNode *node = astbuf1->clone();
node->str = *$1;
append_attr_clone(node, albuf);
if (astbuf2 != NULL)
node->children.push_back(astbuf2->clone());
if ($2 != NULL) {
if (node->is_input || node->is_output)
frontend_verilog_yyerror("Syntax error.");
if (!astbuf2) {
AstNode *rng = new AstNode(AST_RANGE);
rng->children.push_back(AstNode::mkconst_int(0, true));
rng->children.push_back(AstNode::mkconst_int(0, true));
node->children.push_back(rng);
}
node->type = AST_MEMORY;
node->children.push_back($2);
}
if (current_function_or_task == NULL) {
if (do_not_require_port_stubs && (node->is_input || node->is_output) && port_stubs.count(*$1) == 0) {
port_stubs[*$1] = ++port_counter;
}
if (port_stubs.count(*$1) != 0) {
if (!node->is_input && !node->is_output)
frontend_verilog_yyerror("Module port `%s' is neither input nor output.", $1->c_str());
if (node->is_reg && node->is_input && !node->is_output && !sv_mode)
frontend_verilog_yyerror("Input port `%s' is declared as register.", $1->c_str());
node->port_id = port_stubs[*$1];
port_stubs.erase(*$1);
} else {
if (node->is_input || node->is_output)
frontend_verilog_yyerror("Module port `%s' is not declared in module header.", $1->c_str());
}
} else {
if (node->is_input || node->is_output)
node->port_id = current_function_or_task_port_id++;
}
ast_stack.back()->children.push_back(node);
delete $1;
};
assign_stmt:
TOK_ASSIGN delay assign_expr_list ';';
assign_expr_list:
assign_expr | assign_expr_list ',' assign_expr;
assign_expr:
lvalue '=' expr {
ast_stack.back()->children.push_back(new AstNode(AST_ASSIGN, $1, $3));
};
cell_stmt:
attr TOK_ID {
astbuf1 = new AstNode(AST_CELL);
append_attr(astbuf1, $1);
astbuf1->children.push_back(new AstNode(AST_CELLTYPE));
astbuf1->children[0]->str = *$2;
delete $2;
} cell_parameter_list_opt cell_list ';' {
delete astbuf1;
} |
attr tok_prim_wrapper delay {
astbuf1 = new AstNode(AST_PRIMITIVE);
astbuf1->str = *$2;
append_attr(astbuf1, $1);
delete $2;
} prim_list ';' {
delete astbuf1;
};
tok_prim_wrapper:
TOK_PRIMITIVE {
$$ = $1;
} |
TOK_OR {
$$ = new std::string("or");
};
cell_list:
single_cell |
cell_list ',' single_cell;
single_cell:
TOK_ID {
astbuf2 = astbuf1->clone();
if (astbuf2->type != AST_PRIMITIVE)
astbuf2->str = *$1;
delete $1;
ast_stack.back()->children.push_back(astbuf2);
} '(' cell_port_list ')' |
TOK_ID non_opt_range {
astbuf2 = astbuf1->clone();
if (astbuf2->type != AST_PRIMITIVE)
astbuf2->str = *$1;
delete $1;
ast_stack.back()->children.push_back(new AstNode(AST_CELLARRAY, $2, astbuf2));
} '(' cell_port_list ')';
prim_list:
single_prim |
prim_list ',' single_prim;
single_prim:
single_cell |
/* no name */ {
astbuf2 = astbuf1->clone();
ast_stack.back()->children.push_back(astbuf2);
} '(' cell_port_list ')';
cell_parameter_list_opt:
'#' '(' cell_parameter_list ')' | /* empty */;
cell_parameter_list:
cell_parameter | cell_parameter_list ',' cell_parameter;
cell_parameter:
/* empty */ |
expr {
AstNode *node = new AstNode(AST_PARASET);
astbuf1->children.push_back(node);
node->children.push_back($1);
} |
'.' TOK_ID '(' expr ')' {
AstNode *node = new AstNode(AST_PARASET);
node->str = *$2;
astbuf1->children.push_back(node);
node->children.push_back($4);
delete $2;
};
cell_port_list:
cell_port_list_rules {
// remove empty args from end of list
while (!astbuf2->children.empty()) {
AstNode *node = astbuf2->children.back();
if (node->type != AST_ARGUMENT) break;
if (!node->children.empty()) break;
if (!node->str.empty()) break;
astbuf2->children.pop_back();
delete node;
}
// check port types
bool has_positional_args = false;
bool has_named_args = false;
for (auto node : astbuf2->children) {
if (node->type != AST_ARGUMENT) continue;
if (node->str.empty())
has_positional_args = true;
else
has_named_args = true;
}
if (has_positional_args && has_named_args)
frontend_verilog_yyerror("Mix of positional and named cell ports.");
};
cell_port_list_rules:
cell_port | cell_port_list_rules ',' cell_port;
cell_port:
/* empty */ {
AstNode *node = new AstNode(AST_ARGUMENT);
astbuf2->children.push_back(node);
} |
expr {
AstNode *node = new AstNode(AST_ARGUMENT);
astbuf2->children.push_back(node);
node->children.push_back($1);
} |
'.' TOK_ID '(' expr ')' {
AstNode *node = new AstNode(AST_ARGUMENT);
node->str = *$2;
astbuf2->children.push_back(node);
node->children.push_back($4);
delete $2;
} |
'.' TOK_ID '(' ')' {
AstNode *node = new AstNode(AST_ARGUMENT);
node->str = *$2;
astbuf2->children.push_back(node);
delete $2;
};
always_stmt:
attr TOK_ALWAYS {
AstNode *node = new AstNode(AST_ALWAYS);
append_attr(node, $1);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} always_cond {
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
} behavioral_stmt {
ast_stack.pop_back();
ast_stack.pop_back();
} |
attr TOK_INITIAL {
AstNode *node = new AstNode(AST_INITIAL);
append_attr(node, $1);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
} behavioral_stmt {
ast_stack.pop_back();
ast_stack.pop_back();
};
always_cond:
'@' '(' always_events ')' |
'@' '(' '*' ')' |
'@' ATTR_BEGIN ')' |
'@' '(' ATTR_END |
'@' '*' |
/* empty */;
always_events:
always_event |
always_events TOK_OR always_event |
always_events ',' always_event;
always_event:
TOK_POSEDGE expr {
AstNode *node = new AstNode(AST_POSEDGE);
ast_stack.back()->children.push_back(node);
node->children.push_back($2);
} |
TOK_NEGEDGE expr {
AstNode *node = new AstNode(AST_NEGEDGE);
ast_stack.back()->children.push_back(node);
node->children.push_back($2);
} |
expr {
AstNode *node = new AstNode(AST_EDGE);
ast_stack.back()->children.push_back(node);
node->children.push_back($1);
};
opt_label:
':' TOK_ID {
$$ = $2;
} |
/* empty */ {
$$ = NULL;
};
opt_property:
TOK_PROPERTY | /* empty */;
opt_stmt_label:
TOK_ID ':' | /* empty */;
assert:
opt_stmt_label TOK_ASSERT opt_property '(' expr ')' ';' {
if (noassert_mode)
delete $5;
else
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5));
} |
opt_stmt_label TOK_ASSUME opt_property '(' expr ')' ';' {
if (noassume_mode)
delete $5;
else
ast_stack.back()->children.push_back(new AstNode(assert_assumes_mode ? AST_ASSERT : AST_ASSUME, $5));
} |
opt_stmt_label TOK_ASSERT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
if (noassert_mode)
delete $6;
else
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6));
} |
opt_stmt_label TOK_ASSUME opt_property '(' TOK_EVENTUALLY expr ')' ';' {
if (noassume_mode)
delete $6;
else
ast_stack.back()->children.push_back(new AstNode(assert_assumes_mode ? AST_LIVE : AST_FAIR, $6));
} |
opt_stmt_label TOK_COVER opt_property '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, $5));
} |
opt_stmt_label TOK_COVER opt_property '(' ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, AstNode::mkconst_int(1, false)));
} |
opt_stmt_label TOK_COVER ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, AstNode::mkconst_int(1, false)));
} |
opt_stmt_label TOK_RESTRICT opt_property '(' expr ')' ';' {
if (norestrict_mode)
delete $5;
else
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5));
} |
opt_stmt_label TOK_RESTRICT opt_property '(' TOK_EVENTUALLY expr ')' ';' {
if (norestrict_mode)
delete $6;
else
ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6));
};
assert_property:
TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $4));
} |
TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
} |
TOK_ASSERT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $5));
} |
TOK_ASSUME TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5));
} |
TOK_COVER TOK_PROPERTY '(' expr ')' ';' {
ast_stack.back()->children.push_back(new AstNode(AST_COVER, $4));
} |
TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' {
if (norestrict_mode)
delete $4;
else
ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4));
} |
TOK_RESTRICT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' {
if (norestrict_mode)
delete $5;
else
ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5));
};
simple_behavioral_stmt:
lvalue '=' delay expr {
AstNode *node = new AstNode(AST_ASSIGN_EQ, $1, $4);
ast_stack.back()->children.push_back(node);
} |
lvalue TOK_INCREMENT {
AstNode *node = new AstNode(AST_ASSIGN_EQ, $1, new AstNode(AST_ADD, $1->clone(), AstNode::mkconst_int(1, true)));
ast_stack.back()->children.push_back(node);
} |
lvalue TOK_DECREMENT {
AstNode *node = new AstNode(AST_ASSIGN_EQ, $1, new AstNode(AST_SUB, $1->clone(), AstNode::mkconst_int(1, true)));
ast_stack.back()->children.push_back(node);
} |
lvalue OP_LE delay expr {
AstNode *node = new AstNode(AST_ASSIGN_LE, $1, $4);
ast_stack.back()->children.push_back(node);
};
// this production creates the obligatory if-else shift/reduce conflict
behavioral_stmt:
defattr | assert | wire_decl | param_decl | localparam_decl |
non_opt_delay behavioral_stmt |
simple_behavioral_stmt ';' | ';' |
hierarchical_id attr {
AstNode *node = new AstNode(AST_TCALL);
node->str = *$1;
delete $1;
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $2);
} opt_arg_list ';'{
ast_stack.pop_back();
} |
attr TOK_BEGIN opt_label {
AstNode *node = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $1);
if ($3 != NULL)
node->str = *$3;
} behavioral_stmt_list TOK_END opt_label {
if ($3 != NULL && $7 != NULL && *$3 != *$7)
frontend_verilog_yyerror("Syntax error.");
if ($3 != NULL)
delete $3;
if ($7 != NULL)
delete $7;
ast_stack.pop_back();
} |
attr TOK_FOR '(' {
AstNode *node = new AstNode(AST_FOR);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $1);
} simple_behavioral_stmt ';' expr {
ast_stack.back()->children.push_back($7);
} ';' simple_behavioral_stmt ')' {
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
} behavioral_stmt {
ast_stack.pop_back();
ast_stack.pop_back();
} |
attr TOK_WHILE '(' expr ')' {
AstNode *node = new AstNode(AST_WHILE);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $1);
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back($4);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
} behavioral_stmt {
ast_stack.pop_back();
ast_stack.pop_back();
} |
attr TOK_REPEAT '(' expr ')' {
AstNode *node = new AstNode(AST_REPEAT);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $1);
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back($4);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
} behavioral_stmt {
ast_stack.pop_back();
ast_stack.pop_back();
} |
attr TOK_IF '(' expr ')' {
AstNode *node = new AstNode(AST_CASE);
AstNode *block = new AstNode(AST_BLOCK);
AstNode *cond = new AstNode(AST_COND, AstNode::mkconst_int(1, false, 1), block);
ast_stack.back()->children.push_back(node);
node->children.push_back(new AstNode(AST_REDUCE_BOOL, $4));
node->children.push_back(cond);
ast_stack.push_back(node);
ast_stack.push_back(block);
append_attr(node, $1);
} behavioral_stmt optional_else {
ast_stack.pop_back();
ast_stack.pop_back();
} |
case_attr case_type '(' expr ')' {
AstNode *node = new AstNode(AST_CASE, $4);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
append_attr(node, $1);
} opt_synopsys_attr case_body TOK_ENDCASE {
case_type_stack.pop_back();
ast_stack.pop_back();
};
unique_case_attr:
/* empty */ {
$$ = false;
} |
TOK_PRIORITY case_attr {
$$ = $2;
} |
TOK_UNIQUE case_attr {
$$ = true;
};
case_attr:
attr unique_case_attr {
if ($2) (*$1)["\\parallel_case"] = AstNode::mkconst_int(1, false);
$$ = $1;
};
case_type:
TOK_CASE {
case_type_stack.push_back(0);
} |
TOK_CASEX {
case_type_stack.push_back('x');
} |
TOK_CASEZ {
case_type_stack.push_back('z');
};
opt_synopsys_attr:
opt_synopsys_attr TOK_SYNOPSYS_FULL_CASE {
if (ast_stack.back()->attributes.count("\\full_case") == 0)
ast_stack.back()->attributes["\\full_case"] = AstNode::mkconst_int(1, false);
} |
opt_synopsys_attr TOK_SYNOPSYS_PARALLEL_CASE {
if (ast_stack.back()->attributes.count("\\parallel_case") == 0)
ast_stack.back()->attributes["\\parallel_case"] = AstNode::mkconst_int(1, false);
} |
/* empty */;
behavioral_stmt_list:
behavioral_stmt_list behavioral_stmt |
/* empty */;
optional_else:
TOK_ELSE {
AstNode *block = new AstNode(AST_BLOCK);
AstNode *cond = new AstNode(AST_COND, new AstNode(AST_DEFAULT), block);
ast_stack.pop_back();
ast_stack.back()->children.push_back(cond);
ast_stack.push_back(block);
} behavioral_stmt |
/* empty */ %prec FAKE_THEN;
case_body:
case_body case_item |
/* empty */;
case_item:
{
AstNode *node = new AstNode(
case_type_stack.size() && case_type_stack.back() == 'x' ? AST_CONDX :
case_type_stack.size() && case_type_stack.back() == 'z' ? AST_CONDZ : AST_COND);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} case_select {
AstNode *block = new AstNode(AST_BLOCK);
ast_stack.back()->children.push_back(block);
ast_stack.push_back(block);
case_type_stack.push_back(0);
} behavioral_stmt {
case_type_stack.pop_back();
ast_stack.pop_back();
ast_stack.pop_back();
};
gen_case_body:
gen_case_body gen_case_item |
/* empty */;
gen_case_item:
{
AstNode *node = new AstNode(
case_type_stack.size() && case_type_stack.back() == 'x' ? AST_CONDX :
case_type_stack.size() && case_type_stack.back() == 'z' ? AST_CONDZ : AST_COND);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} case_select {
case_type_stack.push_back(0);
} gen_stmt_or_null {
case_type_stack.pop_back();
ast_stack.pop_back();
};
case_select:
case_expr_list ':' |
TOK_DEFAULT;
case_expr_list:
TOK_DEFAULT {
ast_stack.back()->children.push_back(new AstNode(AST_DEFAULT));
} |
expr {
ast_stack.back()->children.push_back($1);
} |
case_expr_list ',' expr {
ast_stack.back()->children.push_back($3);
};
rvalue:
hierarchical_id '[' expr ']' '.' rvalue {
$$ = new AstNode(AST_PREFIX, $3, $6);
$$->str = *$1;
delete $1;
} |
hierarchical_id range {
$$ = new AstNode(AST_IDENTIFIER, $2);
$$->str = *$1;
delete $1;
if ($2 == nullptr && ($$->str == "\\$initstate" ||
$$->str == "\\$anyconst" || $$->str == "\\$anyseq" ||
$$->str == "\\$allconst" || $$->str == "\\$allseq"))
$$->type = AST_FCALL;
} |
hierarchical_id non_opt_multirange {
$$ = new AstNode(AST_IDENTIFIER, $2);
$$->str = *$1;
delete $1;
};
lvalue:
rvalue {
$$ = $1;
} |
'{' lvalue_concat_list '}' {
$$ = $2;
};
lvalue_concat_list:
expr {
$$ = new AstNode(AST_CONCAT);
$$->children.push_back($1);
} |
expr ',' lvalue_concat_list {
$$ = $3;
$$->children.push_back($1);
};
opt_arg_list:
'(' arg_list optional_comma ')' |
/* empty */;
arg_list:
arg_list2 |
/* empty */;
arg_list2:
single_arg |
arg_list ',' single_arg;
single_arg:
expr {
ast_stack.back()->children.push_back($1);
};
module_gen_body:
module_gen_body gen_stmt_or_module_body_stmt |
/* empty */;
gen_stmt_or_module_body_stmt:
gen_stmt | module_body_stmt;
// this production creates the obligatory if-else shift/reduce conflict
gen_stmt:
TOK_FOR '(' {
AstNode *node = new AstNode(AST_GENFOR);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} simple_behavioral_stmt ';' expr {
ast_stack.back()->children.push_back($6);
} ';' simple_behavioral_stmt ')' gen_stmt_block {
ast_stack.pop_back();
} |
TOK_IF '(' expr ')' {
AstNode *node = new AstNode(AST_GENIF);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
ast_stack.back()->children.push_back($3);
} gen_stmt_block opt_gen_else {
ast_stack.pop_back();
} |
case_type '(' expr ')' {
AstNode *node = new AstNode(AST_GENCASE, $3);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} gen_case_body TOK_ENDCASE {
case_type_stack.pop_back();
ast_stack.pop_back();
} |
TOK_BEGIN opt_label {
AstNode *node = new AstNode(AST_GENBLOCK);
node->str = $2 ? *$2 : std::string();
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} module_gen_body TOK_END opt_label {
if ($2 != NULL)
delete $2;
if ($6 != NULL)
delete $6;
ast_stack.pop_back();
};
gen_stmt_block:
{
AstNode *node = new AstNode(AST_GENBLOCK);
ast_stack.back()->children.push_back(node);
ast_stack.push_back(node);
} gen_stmt_or_module_body_stmt {
ast_stack.pop_back();
};
gen_stmt_or_null:
gen_stmt_block | ';';
opt_gen_else:
TOK_ELSE gen_stmt_or_null | /* empty */ %prec FAKE_THEN;
expr:
basic_expr {
$$ = $1;
} |
basic_expr '?' attr expr ':' expr {
$$ = new AstNode(AST_TERNARY);
$$->children.push_back($1);
$$->children.push_back($4);
$$->children.push_back($6);
append_attr($$, $3);
};
basic_expr:
rvalue {
$$ = $1;
} |
'(' expr ')' TOK_CONSTVAL {
if ($4->substr(0, 1) != "'")
frontend_verilog_yyerror("Syntax error.");
AstNode *bits = $2;
AstNode *val = const2ast(*$4, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
if (val == NULL)
log_error("Value conversion failed: `%s'\n", $4->c_str());
$$ = new AstNode(AST_TO_BITS, bits, val);
delete $4;
} |
hierarchical_id TOK_CONSTVAL {
if ($2->substr(0, 1) != "'")
frontend_verilog_yyerror("Syntax error.");
AstNode *bits = new AstNode(AST_IDENTIFIER);
bits->str = *$1;
AstNode *val = const2ast(*$2, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
if (val == NULL)
log_error("Value conversion failed: `%s'\n", $2->c_str());
$$ = new AstNode(AST_TO_BITS, bits, val);
delete $1;
delete $2;
} |
TOK_CONSTVAL TOK_CONSTVAL {
$$ = const2ast(*$1 + *$2, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
if ($$ == NULL || (*$2)[0] != '\'')
log_error("Value conversion failed: `%s%s'\n", $1->c_str(), $2->c_str());
delete $1;
delete $2;
} |
TOK_CONSTVAL {
$$ = const2ast(*$1, case_type_stack.size() == 0 ? 0 : case_type_stack.back(), !lib_mode);
if ($$ == NULL)
log_error("Value conversion failed: `%s'\n", $1->c_str());
delete $1;
} |
TOK_REALVAL {
$$ = new AstNode(AST_REALVALUE);
char *p = (char*)malloc(GetSize(*$1) + 1), *q;
for (int i = 0, j = 0; j < GetSize(*$1); j++)
if ((*$1)[j] != '_')
p[i++] = (*$1)[j], p[i] = 0;
$$->realvalue = strtod(p, &q);
log_assert(*q == 0);
delete $1;
free(p);
} |
TOK_STRING {
$$ = AstNode::mkconst_str(*$1);
delete $1;
} |
hierarchical_id attr {
AstNode *node = new AstNode(AST_FCALL);
node->str = *$1;
delete $1;
ast_stack.push_back(node);
append_attr(node, $2);
} '(' arg_list optional_comma ')' {
$$ = ast_stack.back();
ast_stack.pop_back();
} |
TOK_TO_SIGNED attr '(' expr ')' {
$$ = new AstNode(AST_TO_SIGNED, $4);
append_attr($$, $2);
} |
TOK_TO_UNSIGNED attr '(' expr ')' {
$$ = new AstNode(AST_TO_UNSIGNED, $4);
append_attr($$, $2);
} |
'(' expr ')' {
$$ = $2;
} |
'(' expr ':' expr ':' expr ')' {
delete $2;
$$ = $4;
delete $6;
} |
'{' concat_list '}' {
$$ = $2;
} |
'{' expr '{' concat_list '}' '}' {
$$ = new AstNode(AST_REPLICATE, $2, $4);
} |
'~' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_BIT_NOT, $3);
append_attr($$, $2);
} |
basic_expr '&' attr basic_expr {
$$ = new AstNode(AST_BIT_AND, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_NAND attr basic_expr {
$$ = new AstNode(AST_BIT_NOT, new AstNode(AST_BIT_AND, $1, $4));
append_attr($$, $3);
} |
basic_expr '|' attr basic_expr {
$$ = new AstNode(AST_BIT_OR, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_NOR attr basic_expr {
$$ = new AstNode(AST_BIT_NOT, new AstNode(AST_BIT_OR, $1, $4));
append_attr($$, $3);
} |
basic_expr '^' attr basic_expr {
$$ = new AstNode(AST_BIT_XOR, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_XNOR attr basic_expr {
$$ = new AstNode(AST_BIT_XNOR, $1, $4);
append_attr($$, $3);
} |
'&' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_AND, $3);
append_attr($$, $2);
} |
OP_NAND attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_AND, $3);
append_attr($$, $2);
$$ = new AstNode(AST_LOGIC_NOT, $$);
} |
'|' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_OR, $3);
append_attr($$, $2);
} |
OP_NOR attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_OR, $3);
append_attr($$, $2);
$$ = new AstNode(AST_LOGIC_NOT, $$);
} |
'^' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_XOR, $3);
append_attr($$, $2);
} |
OP_XNOR attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_REDUCE_XNOR, $3);
append_attr($$, $2);
} |
basic_expr OP_SHL attr basic_expr {
$$ = new AstNode(AST_SHIFT_LEFT, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_SHR attr basic_expr {
$$ = new AstNode(AST_SHIFT_RIGHT, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_SSHL attr basic_expr {
$$ = new AstNode(AST_SHIFT_SLEFT, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_SSHR attr basic_expr {
$$ = new AstNode(AST_SHIFT_SRIGHT, $1, $4);
append_attr($$, $3);
} |
basic_expr '<' attr basic_expr {
$$ = new AstNode(AST_LT, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_LE attr basic_expr {
$$ = new AstNode(AST_LE, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_EQ attr basic_expr {
$$ = new AstNode(AST_EQ, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_NE attr basic_expr {
$$ = new AstNode(AST_NE, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_EQX attr basic_expr {
$$ = new AstNode(AST_EQX, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_NEX attr basic_expr {
$$ = new AstNode(AST_NEX, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_GE attr basic_expr {
$$ = new AstNode(AST_GE, $1, $4);
append_attr($$, $3);
} |
basic_expr '>' attr basic_expr {
$$ = new AstNode(AST_GT, $1, $4);
append_attr($$, $3);
} |
basic_expr '+' attr basic_expr {
$$ = new AstNode(AST_ADD, $1, $4);
append_attr($$, $3);
} |
basic_expr '-' attr basic_expr {
$$ = new AstNode(AST_SUB, $1, $4);
append_attr($$, $3);
} |
basic_expr '*' attr basic_expr {
$$ = new AstNode(AST_MUL, $1, $4);
append_attr($$, $3);
} |
basic_expr '/' attr basic_expr {
$$ = new AstNode(AST_DIV, $1, $4);
append_attr($$, $3);
} |
basic_expr '%' attr basic_expr {
$$ = new AstNode(AST_MOD, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_POW attr basic_expr {
$$ = new AstNode(AST_POW, $1, $4);
append_attr($$, $3);
} |
'+' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_POS, $3);
append_attr($$, $2);
} |
'-' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_NEG, $3);
append_attr($$, $2);
} |
basic_expr OP_LAND attr basic_expr {
$$ = new AstNode(AST_LOGIC_AND, $1, $4);
append_attr($$, $3);
} |
basic_expr OP_LOR attr basic_expr {
$$ = new AstNode(AST_LOGIC_OR, $1, $4);
append_attr($$, $3);
} |
'!' attr basic_expr %prec UNARY_OPS {
$$ = new AstNode(AST_LOGIC_NOT, $3);
append_attr($$, $2);
};
concat_list:
expr {
$$ = new AstNode(AST_CONCAT, $1);
} |
expr ',' concat_list {
$$ = $3;
$$->children.push_back($1);
};
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