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parse.y
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%{
/*
* Copyright (c) 1998-2011 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
# include "config.h"
# include "parse_misc.h"
# include "compiler.h"
# include "pform.h"
# include "Statement.h"
# include "PSpec.h"
# include <stack>
# include <cstring>
# include <sstream>
class PSpecPath;
extern void lex_start_table();
extern void lex_end_table();
bool have_timeunit_decl = false;
bool have_timeprec_decl = false;
static list<PExpr*>* param_active_range = 0;
static bool param_active_signed = false;
static ivl_variable_type_t param_active_type = IVL_VT_LOGIC;
/* Port declaration lists use this structure for context. */
static struct {
NetNet::Type port_net_type;
NetNet::PortType port_type;
ivl_variable_type_t var_type;
bool sign_flag;
list<PExpr*>* range;
} port_declaration_context = {NetNet::NONE, NetNet::NOT_A_PORT,
IVL_VT_NO_TYPE, false, 0};
/* The task and function rules need to briefly hold the pointer to the
task/function that is currently in progress. */
static PTask* current_task = 0;
static PFunction* current_function = 0;
static stack<PBlock*> current_block_stack;
/* This is used to keep track of the extra arguments after the notifier
* in the $setuphold and $recrem timing checks. This allows us to print
* a warning message that the delayed signals will not be created. We
* need to do this since not driving these signals creates real
* simulation issues. */
static unsigned args_after_notifier;
/* Later version of bison (including 1.35) will not compile in stack
extension if the output is compiled with C++ and either the YYSTYPE
or YYLTYPE are provided by the source code. However, I can get the
old behavior back by defining these symbols. */
# define YYSTYPE_IS_TRIVIAL 1
# define YYLTYPE_IS_TRIVIAL 1
/* Recent version of bison expect that the user supply a
YYLLOC_DEFAULT macro that makes up a yylloc value from existing
values. I need to supply an explicit version to account for the
text field, that otherwise won't be copied. */
# define YYLLOC_DEFAULT(Current, Rhs, N) do { \
(Current).first_line = (Rhs)[1].first_line; \
(Current).first_column = (Rhs)[1].first_column; \
(Current).last_line = (Rhs)[N].last_line; \
(Current).last_column = (Rhs)[N].last_column; \
(Current).text = (Rhs)[1].text; } while (0)
/*
* These are some common strength pairs that are used as defaults when
* the user is not otherwise specific.
*/
static const struct str_pair_t pull_strength = { IVL_DR_PULL, IVL_DR_PULL };
static const struct str_pair_t str_strength = { IVL_DR_STRONG, IVL_DR_STRONG };
static list<pair<perm_string,PExpr*> >* make_port_list(char*id, PExpr*expr)
{
list<pair<perm_string,PExpr*> >*tmp = new list<pair<perm_string,PExpr*> >;
tmp->push_back(make_pair(lex_strings.make(id), expr));
delete[]id;
return tmp;
}
static list<pair<perm_string,PExpr*> >* make_port_list(list<pair<perm_string,
PExpr*> >*tmp,
char*id, PExpr*expr)
{
tmp->push_back(make_pair(lex_strings.make(id), expr));
delete[]id;
return tmp;
}
static list<PExpr*>* make_range_from_width(uint64_t wid)
{
list<PExpr*>*range = new list<PExpr*>;
range->push_back(new PENumber(new verinum(wid-1, integer_width)));
range->push_back(new PENumber(new verinum((uint64_t)0, integer_width)));
return range;
}
/*
* Make a rqange vector from an existing pair of expressions.
*/
static vector<PExpr*>* make_range_vector(list<PExpr*>*that)
{
assert(that->size() == 2);
vector<PExpr*>*tmp = new vector<PExpr*> (2);
tmp->at(0) = that->front();
tmp->at(1) = that->back();
delete that;
return tmp;
}
/*
* Make a range vector from a width. Generate the msb and lsb
* expressions to get the canonical range for the given width.
*/
static vector<PExpr*>* make_range_vector(uint64_t wid)
{
vector<PExpr*>*tmp = new vector<PExpr*> (2);
tmp->at(0) = new PENumber(new verinum(wid-1, integer_width));
tmp->at(1) = new PENumber(new verinum((uint64_t)0, integer_width));
return tmp;
}
static list<perm_string>* list_from_identifier(char*id)
{
list<perm_string>*tmp = new list<perm_string>;
tmp->push_back(lex_strings.make(id));
delete[]id;
return tmp;
}
static list<perm_string>* list_from_identifier(list<perm_string>*tmp, char*id)
{
tmp->push_back(lex_strings.make(id));
delete[]id;
return tmp;
}
static list<PExpr*>* copy_range(list<PExpr*>* orig)
{
list<PExpr*>*copy = 0;
if (orig)
copy = new list<PExpr*> (*orig);
return copy;
}
template <class T> void append(vector<T>&out, const vector<T>&in)
{
for (size_t idx = 0 ; idx < in.size() ; idx += 1)
out.push_back(in[idx]);
}
/*
* This is a shorthand for making a PECallFunction that takes a single
* arg. This is used by some of the code that detects built-ins.
*/
static PECallFunction*make_call_function(perm_string tn, PExpr*arg)
{
vector<PExpr*> parms(1);
parms[0] = arg;
PECallFunction*tmp = new PECallFunction(tn, parms);
return tmp;
}
static PECallFunction*make_call_function(perm_string tn, PExpr*arg1, PExpr*arg2)
{
vector<PExpr*> parms(2);
parms[0] = arg1;
parms[1] = arg2;
PECallFunction*tmp = new PECallFunction(tn, parms);
return tmp;
}
static list<named_pexpr_t>* make_named_numbers(perm_string name, long first, long last, PExpr*val =0)
{
list<named_pexpr_t>*lst = new list<named_pexpr_t>;
named_pexpr_t tmp;
assert(first <= last);
for (long idx = first ; idx <= last ; idx += 1) {
ostringstream buf;
buf << name.str() << idx << ends;
tmp.name = lex_strings.make(buf.str());
tmp.parm = val;
val = 0;
lst->push_back(tmp);
}
return lst;
}
static list<named_pexpr_t>* make_named_number(perm_string name, PExpr*val =0)
{
list<named_pexpr_t>*lst = new list<named_pexpr_t>;
named_pexpr_t tmp;
tmp.name = name;
tmp.parm = val;
lst->push_back(tmp);
return lst;
}
%}
%union {
bool flag;
char letter;
int int_val;
/* text items are C strings allocated by the lexor using
strdup. They can be put into lists with the texts type. */
char*text;
list<perm_string>*perm_strings;
list<pair<perm_string,PExpr*> >*port_list;
pform_name_t*pform_name;
ivl_discipline_t discipline;
hname_t*hier;
list<string>*strings;
struct str_pair_t drive;
PCase::Item*citem;
svector<PCase::Item*>*citems;
lgate*gate;
svector<lgate>*gates;
Module::port_t *mport;
LexicalScope::range_t* value_range;
vector<Module::port_t*>*mports;
named_number_t* named_number;
list<named_number_t>* named_numbers;
named_pexpr_t*named_pexpr;
list<named_pexpr_t>*named_pexprs;
struct parmvalue_t*parmvalue;
PExpr*expr;
list<PExpr*>*exprs;
svector<PEEvent*>*event_expr;
NetNet::Type nettype;
PGBuiltin::Type gatetype;
NetNet::PortType porttype;
ivl_variable_type_t datatype;
PWire*wire;
svector<PWire*>*wires;
PEventStatement*event_statement;
Statement*statement;
svector<Statement*>*statement_list;
PTaskFuncArg function_type;
net_decl_assign_t*net_decl_assign;
enum_type_t*enum_type;
verinum* number;
verireal* realtime;
PSpecPath* specpath;
list<index_component_t> *dimensions;
};
%token <text> IDENTIFIER SYSTEM_IDENTIFIER STRING TIME_LITERAL
%token <discipline> DISCIPLINE_IDENTIFIER
%token <text> PATHPULSE_IDENTIFIER
%token <number> BASED_NUMBER DEC_NUMBER
%token <realtime> REALTIME
%token K_LE K_GE K_EG K_EQ K_NE K_CEQ K_CNE K_LS K_RS K_RSS K_SG
/* K_CONTRIBUTE is <+, the contribution assign. */
%token K_CONTRIBUTE
%token K_PO_POS K_PO_NEG K_POW
%token K_PSTAR K_STARP K_DOTSTAR
%token K_LOR K_LAND K_NAND K_NOR K_NXOR K_TRIGGER
%token K_edge_descriptor
/* The base tokens from 1364-1995. */
%token K_always K_and K_assign K_begin K_buf K_bufif0 K_bufif1 K_case
%token K_casex K_casez K_cmos K_deassign K_default K_defparam K_disable
%token K_edge K_else K_end K_endcase K_endfunction K_endmodule
%token K_endprimitive K_endspecify K_endtable K_endtask K_event K_for
%token K_force K_forever K_fork K_function K_highz0 K_highz1 K_if
%token K_ifnone K_initial K_inout K_input K_integer K_join K_large
%token K_macromodule K_medium K_module K_nand K_negedge K_nmos K_nor
%token K_not K_notif0 K_notif1 K_or K_output K_parameter K_pmos K_posedge
%token K_primitive K_pull0 K_pull1 K_pulldown K_pullup K_rcmos K_real
%token K_realtime K_reg K_release K_repeat K_rnmos K_rpmos K_rtran
%token K_rtranif0 K_rtranif1 K_scalared K_small K_specify K_specparam
%token K_strong0 K_strong1 K_supply0 K_supply1 K_table K_task K_time
%token K_tran K_tranif0 K_tranif1 K_tri K_tri0 K_tri1 K_triand K_trior
%token K_trireg K_vectored K_wait K_wand K_weak0 K_weak1 K_while K_wire
%token K_wor K_xnor K_xor
%token K_Shold K_Snochange K_Speriod K_Srecovery K_Ssetup K_Ssetuphold
%token K_Sskew K_Swidth
/* Icarus specific tokens. */
%token KK_attribute K_bool K_logic
/* The new tokens from 1364-2001. */
%token K_automatic K_endgenerate K_generate K_genvar K_localparam
%token K_noshowcancelled K_pulsestyle_onevent K_pulsestyle_ondetect
%token K_showcancelled K_signed K_unsigned
%token K_Sfullskew K_Srecrem K_Sremoval K_Stimeskew
/* The 1364-2001 configuration tokens. */
%token K_cell K_config K_design K_endconfig K_incdir K_include K_instance
%token K_liblist K_library K_use
/* The new tokens from 1364-2005. */
%token K_wone K_uwire
/* The new tokens from 1800-2005. */
%token K_alias K_always_comb K_always_ff K_always_latch K_assert
%token K_assume K_before K_bind K_bins K_binsof K_bit K_break K_byte
%token K_chandle K_class K_clocking K_const K_constraint K_context
%token K_continue K_cover K_covergroup K_coverpoint K_cross K_dist K_do
%token K_endclass K_endclocking K_endgroup K_endinterface K_endpackage
%token K_endprogram K_endproperty K_endsequence K_enum K_expect K_export
%token K_extends K_extern K_final K_first_match K_foreach K_forkjoin
%token K_iff K_ignore_bins K_illegal_bins K_import K_inside K_int
/* Icarus already has defined "logic" above! */
%token K_interface K_intersect K_join_any K_join_none K_local
%token K_longint K_matches K_modport K_new K_null K_package K_packed
%token K_priority K_program K_property K_protected K_pure K_rand K_randc
%token K_randcase K_randsequence K_ref K_return K_sequence K_shortint
%token K_shortreal K_solve K_static K_string K_struct K_super
%token K_tagged K_this K_throughout K_timeprecision K_timeunit K_type
%token K_typedef K_union K_unique K_var K_virtual K_void K_wait_order
%token K_wildcard K_with K_within
/* Fake tokens that are passed once we have an initial token. */
%token K_timeprecision_check K_timeunit_check
/* The new tokens from 1800-2009. */
%token K_accept_on K_checker K_endchecker K_eventually K_global K_implies
%token K_let K_nexttime K_reject_on K_restrict K_s_always K_s_eventually
%token K_s_nexttime K_s_until K_s_until_with K_strong K_sync_accept_on
%token K_sync_reject_on K_unique0 K_until K_until_with K_untyped K_weak
/* The new tokens for Verilog-AMS 2.3. */
%token K_above K_abs K_absdelay K_abstol K_access K_acos K_acosh
/* 1800-2005 has defined "assert" above! */
%token K_ac_stim K_aliasparam K_analog K_analysis K_asin K_asinh
%token K_atan K_atan2 K_atanh K_branch K_ceil K_connect K_connectmodule
%token K_connectrules K_continuous K_cos K_cosh K_ddt K_ddt_nature K_ddx
%token K_discipline K_discrete K_domain K_driver_update K_endconnectrules
%token K_enddiscipline K_endnature K_endparamset K_exclude K_exp
%token K_final_step K_flicker_noise K_floor K_flow K_from K_ground
%token K_hypot K_idt K_idtmod K_idt_nature K_inf K_initial_step
%token K_laplace_nd K_laplace_np K_laplace_zd K_laplace_zp
%token K_last_crossing K_limexp K_ln K_log K_max K_merged K_min K_nature
%token K_net_resolution K_noise_table K_paramset K_potential K_pow
/* 1800-2005 has defined "string" above! */
%token K_resolveto K_sin K_sinh K_slew K_split K_sqrt K_tan K_tanh
%token K_timer K_transition K_units K_white_noise K_wreal
%token K_zi_nd K_zi_np K_zi_zd K_zi_zp
%type <flag> from_exclude
%type <number> number
%type <flag> unsigned_signed_opt signed_unsigned_opt reg_opt
%type <flag> udp_reg_opt edge_operator automatic_opt
%type <drive> drive_strength drive_strength_opt dr_strength0 dr_strength1
%type <letter> udp_input_sym udp_output_sym
%type <text> udp_input_list udp_sequ_entry udp_comb_entry
%type <perm_strings> udp_input_declaration_list
%type <strings> udp_entry_list udp_comb_entry_list udp_sequ_entry_list
%type <strings> udp_body
%type <perm_strings> udp_port_list
%type <wires> udp_port_decl udp_port_decls
%type <statement> udp_initial udp_init_opt
%type <expr> udp_initial_expr_opt
%type <text> register_variable net_variable real_variable
%type <perm_strings> register_variable_list net_variable_list
%type <perm_strings> real_variable_list list_of_identifiers
%type <port_list> list_of_port_identifiers
%type <net_decl_assign> net_decl_assign net_decl_assigns
%type <mport> port port_opt port_reference port_reference_list
%type <mport> port_declaration
%type <mports> list_of_ports module_port_list_opt list_of_port_declarations module_attribute_foreign
%type <value_range> parameter_value_range parameter_value_ranges
%type <value_range> parameter_value_ranges_opt
%type <expr> value_range_expression
%type <named_pexprs> enum_name_list enum_name
%type <enum_type> enum_data_type
%type <wires> task_item task_item_list task_item_list_opt
%type <wires> task_port_item task_port_decl task_port_decl_list
%type <wires> function_item function_item_list
%type <named_pexpr> port_name parameter_value_byname
%type <named_pexprs> port_name_list parameter_value_byname_list
%type <named_pexpr> attribute
%type <named_pexprs> attribute_list attribute_instance_list attribute_list_opt
%type <citem> case_item
%type <citems> case_items
%type <gate> gate_instance
%type <gates> gate_instance_list
%type <pform_name> hierarchy_identifier
%type <expr> expression expr_primary expr_mintypmax
%type <expr> lpvalue
%type <expr> branch_probe_expression
%type <expr> delay_value delay_value_simple
%type <exprs> delay1 delay3 delay3_opt delay_value_list
%type <exprs> expression_list_with_nuls expression_list_proper
%type <exprs> cont_assign cont_assign_list
%type <exprs> range range_opt
%type <dimensions> dimensions_opt dimensions
%type <nettype> net_type var_type net_type_opt
%type <gatetype> gatetype switchtype
%type <porttype> port_type
%type <datatype> primitive_type primitive_type_opt
%type <parmvalue> parameter_value_opt
%type <function_type> function_range_or_type_opt
%type <event_expr> event_expression_list
%type <event_expr> event_expression
%type <event_statement> event_control
%type <statement> statement statement_or_null
%type <statement_list> statement_list
%type <statement> analog_statement
%type <letter> spec_polarity
%type <perm_strings> specify_path_identifiers
%type <specpath> specify_simple_path specify_simple_path_decl
%type <specpath> specify_edge_path specify_edge_path_decl
%type <int_val> atom2_type
%token K_TAND
%right '?' ':'
%left K_LOR
%left K_LAND
%left '|'
%left '^' K_NXOR K_NOR
%left '&' K_NAND
%left K_EQ K_NE K_CEQ K_CNE
%left K_GE K_LE '<' '>'
%left K_LS K_RS K_RSS
%left '+' '-'
%left '*' '/' '%'
%left K_POW
%left UNARY_PREC
/* to resolve dangling else ambiguity. */
%nonassoc less_than_K_else
%nonassoc K_else
/* to resolve exclude (... ambiguity */
%nonassoc '('
%nonassoc K_exclude
%%
/* A degenerate source file can be completely empty. */
main : source_file | ;
source_file
: description
| source_file description
;
number : BASED_NUMBER
{ $$ = $1; based_size = 0;}
| DEC_NUMBER
{ $$ = $1; based_size = 0;}
| DEC_NUMBER BASED_NUMBER
{ $$ = pform_verinum_with_size($1,$2, @2.text, @2.first_line);
based_size = 0; }
;
/* real and realtime are exactly the same so save some code
* with a common matching rule. */
real_or_realtime
: K_real
| K_realtime
;
/* Verilog-2001 supports attribute lists, which can be attached to a
variety of different objects. The syntax inside the (* *) is a
comma separated list of names or names with assigned values. */
attribute_list_opt
: attribute_instance_list
| { $$ = 0; }
;
attribute_instance_list
: K_PSTAR K_STARP { $$ = 0; }
| K_PSTAR attribute_list K_STARP { $$ = $2; }
| attribute_instance_list K_PSTAR K_STARP { $$ = $1; }
| attribute_instance_list K_PSTAR attribute_list K_STARP
{ list<named_pexpr_t>*tmp = $1;
if (tmp) {
tmp->splice(tmp->end(), *$3);
delete $3;
$$ = tmp;
} else $$ = $3;
}
;
attribute_list
: attribute_list ',' attribute
{ list<named_pexpr_t>*tmp = $1;
tmp->push_back(*$3);
delete $3;
$$ = tmp;
}
| attribute
{ list<named_pexpr_t>*tmp = new list<named_pexpr_t>;
tmp->push_back(*$1);
delete $1;
$$ = tmp;
}
;
attribute
: IDENTIFIER
{ named_pexpr_t*tmp = new named_pexpr_t;
tmp->name = lex_strings.make($1);
tmp->parm = 0;
delete[]$1;
$$ = tmp;
}
| IDENTIFIER '=' expression
{ PExpr*tmp = $3;
named_pexpr_t*tmp2 = new named_pexpr_t;
tmp2->name = lex_strings.make($1);
tmp2->parm = tmp;
delete[]$1;
$$ = tmp2;
}
;
/* The block_item_decl is used in function definitions, task
definitions, module definitions and named blocks. Wherever a new
scope is entered, the source may declare new registers and
integers. This rule matches those declarations. The containing
rule has presumably set up the scope. */
block_item_decl
: attribute_list_opt K_reg
primitive_type_opt unsigned_signed_opt range
register_variable_list ';'
{ ivl_variable_type_t dtype = $3;
if (dtype == IVL_VT_NO_TYPE)
dtype = IVL_VT_LOGIC;
pform_set_net_range($6, $5, $4, dtype);
if ($1) delete $1;
}
/* This differs from the above pattern only in the absence of the
range. This is the rule for a scalar. */
| attribute_list_opt K_reg
primitive_type_opt unsigned_signed_opt
register_variable_list ';'
{ ivl_variable_type_t dtype = $3;
if (dtype == IVL_VT_NO_TYPE)
dtype = IVL_VT_LOGIC;
pform_set_net_range($5, 0, $4, dtype);
if ($1) delete $1;
}
/* Integer atom declarations are simpler in that they do not have
all the trappings of a general variable declaration. All of that
is implicit in the "integer" of the declaration. */
| attribute_list_opt K_integer signed_unsigned_opt register_variable_list ';'
{ pform_set_reg_integer($4);
if ($1) delete $1;
}
| attribute_list_opt K_time register_variable_list ';'
{ pform_set_reg_time($3);
if ($1) delete $1;
}
| attribute_list_opt atom2_type signed_unsigned_opt register_variable_list ';'
{ pform_set_integer_2atom($2, $3, $4);
if ($1) delete $1;
}
/* Enum data types are possible here. */
| attribute_list_opt enum_data_type register_variable_list ';'
{ pform_set_enum(@2, $2, $3);
if ($1) delete $1;
}
/* real declarations are fairly simple as there is no range of
signed flag in the declaration. Create the real as a NetNet::REG
with real value. Note that real and realtime are interchangeable
in this context. */
| attribute_list_opt K_real real_variable_list ';'
{ delete $3; }
| attribute_list_opt K_realtime real_variable_list ';'
{ delete $3; }
| K_event list_of_identifiers ';'
{ pform_make_events($2, @1.text, @1.first_line);
}
| K_parameter parameter_assign_decl ';'
| K_localparam localparam_assign_decl ';'
/* Recover from errors that happen within variable lists. Use the
trailing semi-colon to resync the parser. */
| attribute_list_opt K_reg error ';'
{ yyerror(@2, "error: syntax error in reg variable list.");
yyerrok;
if ($1) delete $1;
}
| attribute_list_opt K_integer error ';'
{ yyerror(@2, "error: syntax error in integer variable list.");
yyerrok;
if ($1) delete $1;
}
| attribute_list_opt K_time error ';'
{ yyerror(@2, "error: syntax error in time variable list.");
yyerrok;
}
| attribute_list_opt K_real error ';'
{ yyerror(@2, "error: syntax error in real variable list.");
yyerrok;
}
| attribute_list_opt K_realtime error ';'
{ yyerror(@2, "error: syntax error in realtime variable list.");
yyerrok;
}
| K_parameter error ';'
{ yyerror(@1, "error: syntax error in parameter list.");
yyerrok;
}
| K_localparam error ';'
{ yyerror(@1, "error: syntax error localparam list.");
yyerrok;
}
;
block_item_decls
: block_item_decl
| block_item_decls block_item_decl
;
block_item_decls_opt
: block_item_decls
|
;
/* The structure for an enumeration data type is the keyword "enum",
followed by the enumeration values in curly braces. Also allow
for an optional base type. The default base type is "int", but it
can be any of the integral or vector types. */
enum_data_type
: K_enum '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($3);
enum_type->base_type = IVL_VT_BOOL;
enum_type->signed_flag = true;
enum_type->range.reset( make_range_from_width(32) );
$$ = enum_type;
}
| K_enum atom2_type signed_unsigned_opt '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($5);
enum_type->base_type = IVL_VT_BOOL;
enum_type->signed_flag = $3;
enum_type->range.reset( make_range_from_width($2) );
$$ = enum_type;
}
| K_enum K_integer signed_unsigned_opt '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($5);
enum_type->base_type = IVL_VT_LOGIC;
enum_type->signed_flag = $3;
enum_type->range.reset( make_range_from_width(integer_width) );
$$ = enum_type;
}
| K_enum K_logic range unsigned_signed_opt '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($6);
enum_type->base_type = IVL_VT_LOGIC;
enum_type->signed_flag = $4;
enum_type->range.reset( $3 );
$$ = enum_type;
}
| K_enum K_reg range unsigned_signed_opt '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($6);
enum_type->base_type = IVL_VT_LOGIC;
enum_type->signed_flag = $4;
enum_type->range.reset( $3 );
$$ = enum_type;
}
| K_enum K_bit range unsigned_signed_opt '{' enum_name_list '}'
{ enum_type_t*enum_type = new enum_type_t;
enum_type->names .reset($6);
enum_type->base_type = IVL_VT_BOOL;
enum_type->signed_flag = $4;
enum_type->range.reset( $3 );
$$ = enum_type;
}
;
enum_name_list
: enum_name
{ $$ = $1;
}
| enum_name_list ',' enum_name
{ list<named_pexpr_t>*lst = $1;
lst->splice(lst->end(), *$3);
delete $3;
$$ = lst;
}
;
enum_name
: IDENTIFIER
{ perm_string name = lex_strings.make($1);
delete[]$1;
$$ = make_named_number(name);
}
| IDENTIFIER '[' DEC_NUMBER ']'
{ perm_string name = lex_strings.make($1);
long count = $3->as_ulong();
delete[]$1;
$$ = make_named_numbers(name, 0, count-1);
delete $3;
}
| IDENTIFIER '[' DEC_NUMBER ':' DEC_NUMBER ']'
{ perm_string name = lex_strings.make($1);
$$ = make_named_numbers(name, $3->as_long(), $5->as_long());
delete[]$1;
delete $3;
delete $5;
}
| IDENTIFIER '=' expression
{ perm_string name = lex_strings.make($1);
delete[]$1;
$$ = make_named_number(name, $3);
}
| IDENTIFIER '[' DEC_NUMBER ']' '=' expression
{ perm_string name = lex_strings.make($1);
long count = $3->as_ulong();
$$ = make_named_numbers(name, 0, count-1, $6);
delete[]$1;
delete $3;
}
| IDENTIFIER '[' DEC_NUMBER ':' DEC_NUMBER ']' '=' expression
{ perm_string name = lex_strings.make($1);
$$ = make_named_numbers(name, $3->as_long(), $5->as_long(), $8);
delete[]$1;
delete $3;
delete $5;
}
;
case_item
: expression_list_proper ':' statement_or_null
{ PCase::Item*tmp = new PCase::Item;
tmp->expr = *$1;
tmp->stat = $3;
delete $1;
$$ = tmp;
}
| K_default ':' statement_or_null
{ PCase::Item*tmp = new PCase::Item;
tmp->stat = $3;
$$ = tmp;
}
| K_default statement_or_null
{ PCase::Item*tmp = new PCase::Item;
tmp->stat = $2;
$$ = tmp;
}
| error ':' statement_or_null
{ yyerror(@2, "error: Incomprehensible case expression.");
yyerrok;
}
;
case_items
: case_items case_item
{ svector<PCase::Item*>*tmp;
tmp = new svector<PCase::Item*>(*$1, $2);
delete $1;
$$ = tmp;
}
| case_item
{ svector<PCase::Item*>*tmp = new svector<PCase::Item*>(1);
(*tmp)[0] = $1;
$$ = tmp;
}
;
charge_strength
: '(' K_small ')'
| '(' K_medium ')'
| '(' K_large ')'
;
charge_strength_opt
: charge_strength
|
;
defparam_assign
: hierarchy_identifier '=' expression
{ pform_set_defparam(*$1, $3);
delete $1;
}
;
defparam_assign_list
: defparam_assign
| range defparam_assign
{ yyerror(@1, "error: defparam may not include a range.");
delete $1;
}
| defparam_assign_list ',' defparam_assign
;
delay1
: '#' delay_value_simple
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($2);
$$ = tmp;
}
| '#' '(' delay_value ')'
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($3);
$$ = tmp;
}
;
delay3
: '#' delay_value_simple
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($2);
$$ = tmp;
}
| '#' '(' delay_value ')'
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($3);
$$ = tmp;
}
| '#' '(' delay_value ',' delay_value ')'
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($3);
tmp->push_back($5);
$$ = tmp;
}
| '#' '(' delay_value ',' delay_value ',' delay_value ')'
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($3);
tmp->push_back($5);
tmp->push_back($7);
$$ = tmp;
}
;
delay3_opt
: delay3 { $$ = $1; }
| { $$ = 0; }
;
delay_value_list
: delay_value
{ list<PExpr*>*tmp = new list<PExpr*>;
tmp->push_back($1);
$$ = tmp;
}
| delay_value_list ',' delay_value
{ list<PExpr*>*tmp = $1;
tmp->push_back($3);
$$ = tmp;
}
;
delay_value
: expression
{ PExpr*tmp = $1;
$$ = tmp;
}
| expression ':' expression ':' expression
{ $$ = pform_select_mtm_expr($1, $3, $5); }
;
delay_value_simple
: DEC_NUMBER
{ verinum*tmp = $1;
if (tmp == 0) {
yyerror(@1, "internal error: delay.");
$$ = 0;
} else {
$$ = new PENumber(tmp);
FILE_NAME($$, @1);
}
based_size = 0;
}
| REALTIME
{ verireal*tmp = $1;
if (tmp == 0) {
yyerror(@1, "internal error: delay.");
$$ = 0;
} else {
$$ = new PEFNumber(tmp);
FILE_NAME($$, @1);
}
}
| IDENTIFIER
{ PEIdent*tmp = new PEIdent(lex_strings.make($1));
FILE_NAME(tmp, @1);
$$ = tmp;
delete[]$1;
}
;
description
: module
| udp_primitive
| config_declaration
| nature_declaration
| discipline_declaration
| KK_attribute '(' IDENTIFIER ',' STRING ',' STRING ')'
{ perm_string tmp3 = lex_strings.make($3);
pform_set_type_attrib(tmp3, $5, $7);
delete[] $3;
delete[] $5;
}
| K_timeunit TIME_LITERAL ';'
{ pform_set_timeunit($2, false, false); }
| K_timeprecision TIME_LITERAL ';'
{ pform_set_timeprecision($2, false, false); }
;
/* The discipline and nature declarations used to take no ';' after
the identifier. The 2.3 LRM adds the ';', but since there are
programs written to the 2.1 and 2.2 standard that don't, we
choose to make the ';' optional in this context. */
optional_semicolon : ';' | ;
discipline_declaration
: K_discipline IDENTIFIER optional_semicolon
{ pform_start_discipline($2); }
discipline_items K_enddiscipline
{ pform_end_discipline(@1); delete[] $2; }
;
discipline_items
: discipline_items discipline_item
| discipline_item