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parse.y
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parse.y
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%{
/*
* Copyright (c) 1998-2000 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
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: parse.y,v 1.128 2001/08/31 21:08:35 steve Exp $"
#endif
# include "config.h"
# include "parse_misc.h"
# include "pform.h"
extern void lex_start_table();
extern void lex_end_table();
/*
* These are the strengths to use for net declaration
* assignments. They are stored here so that scope that contains the
* net_decl_assigns can change them during specific statements.
*/
static struct str_pair_t decl_strength = { PGate::STRONG, PGate::STRONG };
%}
%union {
char letter;
/* text items are C strings allocated by the lexor using
strdup. They can be put into lists with the texts type. */
char*text;
list<char*>*texts;
list<string>*strings;
struct str_pair_t drive;
PCase::Item*citem;
svector<PCase::Item*>*citems;
lgate*gate;
svector<lgate>*gates;
Module::port_t *mport;
svector<Module::port_t*>*mports;
portname_t*portname;
svector<portname_t*>*portnames;
struct parmvalue_t*parmvalue;
PExpr*expr;
svector<PExpr*>*exprs;
svector<PEEvent*>*event_expr;
NetNet::Type nettype;
PGBuiltin::Type gatetype;
NetNet::PortType porttype;
PWire*wire;
svector<PWire*>*wires;
PEventStatement*event_statement;
Statement*statement;
svector<Statement*>*statement_list;
verinum* number;
verireal* realtime;
};
%token <text> HIDENTIFIER IDENTIFIER PORTNAME SYSTEM_IDENTIFIER STRING
%token <number> NUMBER
%token <realtime> REALTIME
%token K_LE K_GE K_EG K_EQ K_NE K_CEQ K_CNE K_LS K_RS K_SG
%token K_PO_POS K_PO_NEG
%token K_LOR K_LAND K_NAND K_NOR K_NXOR K_TRIGGER
%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_initial K_inout K_input K_integer K_join K_large K_localparam
%token K_macromodule
%token K_medium K_module K_nand K_negedge K_nmos K_nor K_not K_notif0
%token K_notif1 K_or K_output K_parameter K_pmos K_posedge K_primitive
%token K_pull0 K_pull1 K_pulldown K_pullup K_rcmos K_real K_realtime
%token K_reg K_release K_repeat
%token K_rnmos K_rpmos K_rtran K_rtranif0 K_rtranif1 K_scalered
%token K_signed K_small K_specify
%token K_specparam K_strong0 K_strong1 K_supply0 K_supply1 K_table K_task
%token K_time K_tran K_tranif0 K_tranif1 K_tri K_tri0 K_tri1 K_triand
%token K_trior K_trireg K_vectored K_wait K_wand K_weak0 K_weak1
%token K_while K_wire
%token K_wor K_xnor K_xor
%token K_Shold K_Speriod K_Srecovery K_Ssetup K_Swidth K_Ssetuphold
%token KK_attribute
%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 <strings> udp_entry_list udp_comb_entry_list udp_sequ_entry_list
%type <strings> udp_body udp_port_list
%type <wires> udp_port_decl udp_port_decls
%type <statement> udp_initial udp_init_opt
%type <text> identifier register_variable
%type <texts> register_variable_list list_of_variables
%type <text> net_decl_assign
%type <texts> net_decl_assigns
%type <mport> port port_opt port_reference port_reference_list
%type <mports> list_of_ports list_of_ports_opt
%type <wires> task_item task_item_list task_item_list_opt
%type <wires> function_item function_item_list
%type <portname> port_name parameter_value_byname
%type <portnames> port_name_list parameter_value_byname_list
%type <citem> case_item
%type <citems> case_items
%type <gate> gate_instance
%type <gates> gate_instance_list
%type <expr> expression expr_primary
%type <expr> lavalue lpvalue
%type <expr> delay_value delay_value_simple
%type <exprs> delay1 delay3 delay3_opt
%type <exprs> expression_list
%type <exprs> assign assign_list
%type <exprs> range range_opt
%type <nettype> net_type
%type <gatetype> gatetype
%type <porttype> port_type
%type <parmvalue> parameter_value_opt
%type <exprs> range_or_type_opt
%type <event_expr> event_expression_list
%type <event_expr> event_expression
%type <event_statement> event_control
%type <statement> statement statement_opt
%type <statement_list> statement_list
%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
%left '+' '-'
%left '*' '/' '%'
%left UNARY_PREC
/* to resolve dangling else ambiguity: */
%nonassoc less_than_K_else
%nonassoc K_else
%%
/* A degenerate source file can be completely empty. */
main : source_file | ;
source_file
: description
| source_file description
;
/* 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
: K_reg range register_variable_list ';'
{ pform_set_net_range($3, $2, false);
}
| K_reg register_variable_list ';'
{ delete $2; }
| K_reg K_signed range register_variable_list ';'
{ pform_set_net_range($4, $3, true);
}
| K_reg K_signed register_variable_list ';'
{ delete $3;
yyerror(@2, "sorry: signed reg not supported.");
}
| K_integer register_variable_list ';'
{ pform_set_reg_integer($2);
}
| K_time register_variable_list ';'
{ pform_set_reg_time($2);
}
| K_real list_of_variables ';'
{ delete $2;
yyerror(@1, "sorry: real variables not supported.");
}
| K_realtime list_of_variables ';'
{ delete $2;
yyerror(@1, "sorry: reatime variables not supported.");
}
| K_parameter parameter_assign_list ';'
| K_localparam localparam_assign_list ';'
/* Recover from errors that happen within variable lists. Use the
trailing semi-colon to resync the parser. */
| K_reg error ';'
{ yyerror(@1, "error: syntax error in reg variable list.");
yyerrok;
}
| K_integer error ';'
{ yyerror(@1, "error: syntax error in integer variable list.");
yyerrok;
}
| K_time error ';'
{ yyerror(@1, "error: syntax error in time variable list.");
yyerrok;
}
| K_real error ';'
{ yyerror(@1, "error: syntax error in real variable list.");
yyerrok;
}
| K_realtime error ';'
{ yyerror(@1, "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
|
;
case_item
: expression_list ':' statement_opt
{ PCase::Item*tmp = new PCase::Item;
tmp->expr = *$1;
tmp->stat = $3;
delete $1;
$$ = tmp;
}
| K_default ':' statement_opt
{ PCase::Item*tmp = new PCase::Item;
tmp->stat = $3;
$$ = tmp;
}
| K_default statement_opt
{ PCase::Item*tmp = new PCase::Item;
tmp->stat = $2;
$$ = tmp;
}
| error ':' statement_opt
{ yyerror(@1, "error: Incomprehensible case expression.");
yyerrok;
}
;
case_items
: case_items case_item
{ svector<PCase::Item*>*tmp;
tmp = new svector<PCase::Item*>(*$1, $2);
delete $1;
$$ = tmp;
}
| case_item
{ svector<PCase::Item*>*tmp = new svector<PCase::Item*>(1);
(*tmp)[0] = $1;
$$ = tmp;
}
;
charge_strength
: '(' K_small ')'
| '(' K_medium ')'
| '(' K_large ')'
;
charge_strength_opt
: charge_strength
|
;
defparam_assign
: identifier '=' expression
{ PExpr*tmp = $3;
if (!pform_expression_is_constant(tmp)) {
yyerror(@3, "error: parameter value "
"must be constant.");
delete tmp;
tmp = 0;
}
pform_set_defparam($1, $3);
delete $1;
}
;
defparam_assign_list
: defparam_assign
| range defparam_assign
{ yywarn(@1, "Ranges in parameter definition "
"are not supported.");
delete $1;
}
| defparam_assign_list ',' defparam_assign
;
delay1
: '#' delay_value_simple
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $2;
$$ = tmp;
}
| '#' '(' delay_value ')'
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $3;
$$ = tmp;
}
;
delay3
: '#' delay_value_simple
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $2;
$$ = tmp;
}
| '#' '(' delay_value ')'
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $3;
$$ = tmp;
}
| '#' '(' delay_value ',' delay_value ')'
{ svector<PExpr*>*tmp = new svector<PExpr*>(2);
(*tmp)[0] = $3;
(*tmp)[1] = $5;
$$ = tmp;
}
| '#' '(' delay_value ',' delay_value ',' delay_value ')'
{ svector<PExpr*>*tmp = new svector<PExpr*>(3);
(*tmp)[0] = $3;
(*tmp)[1] = $5;
(*tmp)[2] = $7;
$$ = tmp;
}
;
delay3_opt
: delay3 { $$ = $1; }
| { $$ = 0; }
;
delay_value
: expression
{ PExpr*tmp = $1;
$$ = tmp;
}
| expression ':' expression ':' expression
{ $$ = pform_select_mtm_expr($1, $3, $5); }
;
delay_value_simple
: NUMBER
{ verinum*tmp = $1;
if (tmp == 0) {
yyerror(@1, "internal error: delay.");
$$ = 0;
} else {
$$ = new PENumber(tmp);
$$->set_file(@1.text);
$$->set_lineno(@1.first_line);
}
}
| REALTIME
{ verireal*tmp = $1;
if (tmp == 0) {
yyerror(@1, "internal error: delay.");
$$ = 0;
} else {
$$ = new PEFNumber(tmp);
$$->set_file(@1.text);
$$->set_lineno(@1.first_line);
}
}
| IDENTIFIER
{ PEIdent*tmp = new PEIdent($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
delete $1;
}
;
description
: module
| udp_primitive
| KK_attribute '(' IDENTIFIER ',' STRING ',' STRING ')'
{ pform_set_type_attrib($3, $5, $7);
delete $3;
delete $5;
delete $7;
}
;
drive_strength
: '(' dr_strength0 ',' dr_strength1 ')'
{ $$.str0 = $2.str0;
$$.str1 = $4.str1;
}
| '(' dr_strength1 ',' dr_strength0 ')'
{ $$.str0 = $4.str0;
$$.str1 = $2.str1;
}
| '(' dr_strength0 ',' K_highz1 ')'
{ $$.str0 = $2.str0;
$$.str1 = PGate::HIGHZ;
}
| '(' dr_strength1 ',' K_highz0 ')'
{ $$.str0 = PGate::HIGHZ;
$$.str1 = $2.str1;
}
| '(' K_highz1 ',' dr_strength0 ')'
{ $$.str0 = $4.str0;
$$.str1 = PGate::HIGHZ;
}
| '(' K_highz0 ',' dr_strength1 ')'
{ $$.str0 = PGate::HIGHZ;
$$.str1 = $4.str1;
}
;
drive_strength_opt
: drive_strength { $$ = $1; }
| { $$.str0 = PGate::STRONG; $$.str1 = PGate::STRONG; }
;
dr_strength0
: K_supply0 { $$.str0 = PGate::SUPPLY; }
| K_strong0 { $$.str0 = PGate::STRONG; }
| K_pull0 { $$.str0 = PGate::PULL; }
| K_weak0 { $$.str0 = PGate::WEAK; }
;
dr_strength1
: K_supply1 { $$.str1 = PGate::SUPPLY; }
| K_strong1 { $$.str1 = PGate::STRONG; }
| K_pull1 { $$.str1 = PGate::PULL; }
| K_weak1 { $$.str1 = PGate::WEAK; }
;
event_control
: '@' IDENTIFIER
{ PEIdent*tmpi = new PEIdent($2);
tmpi->set_file(@2.text);
tmpi->set_lineno(@2.first_line);
delete[]$2;
PEEvent*tmpe = new PEEvent(PEEvent::ANYEDGE, tmpi);
PEventStatement*tmps = new PEventStatement(tmpe);
tmps->set_file(@1.text);
tmps->set_lineno(@1.first_line);
$$ = tmps;
}
| '@' '(' event_expression_list ')'
{ PEventStatement*tmp = new PEventStatement(*$3);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
delete $3;
$$ = tmp;
}
| '@' '(' error ')'
{ yyerror(@1, "error: Malformed event control expression.");
$$ = 0;
}
;
event_expression_list
: event_expression
{ $$ = $1; }
| event_expression_list K_or event_expression
{ svector<PEEvent*>*tmp = new svector<PEEvent*>(*$1, *$3);
delete $1;
delete $3;
$$ = tmp;
}
| event_expression_list ',' event_expression
{ svector<PEEvent*>*tmp = new svector<PEEvent*>(*$1, *$3);
delete $1;
delete $3;
$$ = tmp;
}
;
event_expression
: K_posedge expression
{ PEEvent*tmp = new PEEvent(PEEvent::POSEDGE, $2);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
svector<PEEvent*>*tl = new svector<PEEvent*>(1);
(*tl)[0] = tmp;
$$ = tl;
}
| K_negedge expression
{ PEEvent*tmp = new PEEvent(PEEvent::NEGEDGE, $2);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
svector<PEEvent*>*tl = new svector<PEEvent*>(1);
(*tl)[0] = tmp;
$$ = tl;
}
| expression
{ PEEvent*tmp = new PEEvent(PEEvent::ANYEDGE, $1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
svector<PEEvent*>*tl = new svector<PEEvent*>(1);
(*tl)[0] = tmp;
$$ = tl;
}
;
expression
: expr_primary
{ $$ = $1; }
| '+' expr_primary %prec UNARY_PREC
{ $$ = $2; }
| '-' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('-', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '~' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('~', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '&' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('&', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '!' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('!', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '|' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('|', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '^' expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('^', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| K_NAND expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('A', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| K_NOR expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('N', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| K_NXOR expr_primary %prec UNARY_PREC
{ PEUnary*tmp = new PEUnary('X', $2);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| '!' error %prec UNARY_PREC
{ yyerror(@1, "error: Operand of unary ! "
"is not a primary expression.");
$$ = 0;
}
| '^' error %prec UNARY_PREC
{ yyerror(@1, "error: Operand of reduction ^ "
"is not a primary expression.");
$$ = 0;
}
| expression '^' expression
{ PEBinary*tmp = new PEBinary('^', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '*' expression
{ PEBinary*tmp = new PEBinary('*', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '/' expression
{ PEBinary*tmp = new PEBinary('/', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '%' expression
{ PEBinary*tmp = new PEBinary('%', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '+' expression
{ PEBinary*tmp = new PEBinary('+', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '-' expression
{ PEBinary*tmp = new PEBinary('-', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '&' expression
{ PEBinary*tmp = new PEBinary('&', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '|' expression
{ PEBinary*tmp = new PEBinary('|', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_NOR expression
{ PEBinary*tmp = new PEBinary('O', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_NXOR expression
{ PEBinary*tmp = new PEBinary('X', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '<' expression
{ PEBinary*tmp = new PEBinary('<', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '>' expression
{ PEBinary*tmp = new PEBinary('>', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_LS expression
{ PEBinary*tmp = new PEBinary('l', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_RS expression
{ PEBinary*tmp = new PEBinary('r', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_EQ expression
{ PEBinary*tmp = new PEBinary('e', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_CEQ expression
{ PEBinary*tmp = new PEBinary('E', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_LE expression
{ PEBinary*tmp = new PEBinary('L', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_GE expression
{ PEBinary*tmp = new PEBinary('G', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_NE expression
{ PEBinary*tmp = new PEBinary('n', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_CNE expression
{ PEBinary*tmp = new PEBinary('N', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_LOR expression
{ PEBinary*tmp = new PEBinary('o', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression K_LAND expression
{ PEBinary*tmp = new PEBinary('a', $1, $3);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
| expression '?' expression ':' expression
{ PETernary*tmp = new PETernary($1, $3, $5);
tmp->set_file(@2.text);
tmp->set_lineno(@2.first_line);
$$ = tmp;
}
;
/* Many contexts take a comma separated list of expressions. Null
expressions can happen anywhere in the list, so there are two
extra rules for parsing and installing those nulls. */
expression_list
: expression_list ',' expression
{ svector<PExpr*>*tmp = new svector<PExpr*>(*$1, $3);
delete $1;
$$ = tmp;
}
| expression
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = $1;
$$ = tmp;
}
|
{ svector<PExpr*>*tmp = new svector<PExpr*>(1);
(*tmp)[0] = 0;
$$ = tmp;
}
| expression_list ','
{ svector<PExpr*>*tmp = new svector<PExpr*>(*$1, 0);
delete $1;
$$ = tmp;
}
;
expr_primary
: NUMBER
{ assert($1);
PENumber*tmp = new PENumber($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
}
| REALTIME
{ PEFNumber*tmp = new PEFNumber($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
}
| STRING
{ PEString*tmp = new PEString($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
delete $1;
}
| identifier
{ PEIdent*tmp = new PEIdent($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
delete $1;
}
| SYSTEM_IDENTIFIER
{ PECallFunction*tmp = new PECallFunction($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
delete $1
}
| identifier '[' expression ']'
{ PEIdent*tmp = new PEIdent($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
tmp->msb_ = $3;
delete $1;
$$ = tmp;
}
| identifier '[' expression ':' expression ']'
{ PEIdent*tmp = new PEIdent($1);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
tmp->msb_ = $3;
tmp->lsb_ = $5;
delete $1;
$$ = tmp;
}
| identifier '(' expression_list ')'
{ PECallFunction*tmp = new PECallFunction($1, *$3);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
}
| SYSTEM_IDENTIFIER '(' expression_list ')'
{ PECallFunction*tmp = new PECallFunction($1, *$3);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
$$ = tmp;
}
| '(' expression ')'
{ $$ = $2; }
| '{' expression_list '}'
{ PEConcat*tmp = new PEConcat(*$2);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
delete $2;
$$ = tmp;
}
| '{' expression '{' expression_list '}' '}'
{ PExpr*rep = $2;
if (!pform_expression_is_constant($2)) {
yyerror(@2, "error: Repeat expression "
"must be constant.");
delete rep;
delete $2;
rep = 0;
}
PEConcat*tmp = new PEConcat(*$4, rep);
tmp->set_file(@1.text);
tmp->set_lineno(@1.first_line);
delete $4;
$$ = tmp;
}
;
/* A function_item is either a block item (i.e. a reg or integer
declaration) or an input declaration. There are no output or
inout ports. */
function_item
: K_input range_opt list_of_variables ';'
{ svector<PWire*>*tmp
= pform_make_task_ports(NetNet::PINPUT, $2, $3,
@1.text, @1.first_line);
$$ = tmp;
}
| block_item_decl
{ $$ = 0; }
;
/* A function_item_list only lists the input/output/inout
declarations. The integer and reg declarations are handled in
place, so are not listed. The list builder needs to account for
the possibility that the various parts may be NULL. */
function_item_list
: function_item
{ $$ = $1; }
| function_item_list function_item
{ if ($1 && $2) {
svector<PWire*>*tmp = new svector<PWire*>(*$1, *$2);
delete $1;
delete $2;
$$ = tmp;
} else if ($1) {
$$ = $1;
} else {
$$ = $2;
}
}
;
/* A gate_instance is a module instantiation or a built in part
type. In any case, the gate has a set of connections to ports. */
gate_instance
: IDENTIFIER '(' expression_list ')'
{ lgate*tmp = new lgate;
tmp->name = $1;
tmp->parms = $3;
tmp->file = @1.text;
tmp->lineno = @1.first_line;
delete $1;
$$ = tmp;
}
| IDENTIFIER range '(' expression_list ')'
{ lgate*tmp = new lgate;
svector<PExpr*>*rng = $2;
tmp->name = $1;
tmp->parms = $4;
tmp->range[0] = (*rng)[0];
tmp->range[1] = (*rng)[1];
tmp->file = @1.text;
tmp->lineno = @1.first_line;
delete $1;
delete rng;
$$ = tmp;
}
| '(' expression_list ')'
{ lgate*tmp = new lgate;
tmp->name = "";
tmp->parms = $2;
tmp->file = @1.text;
tmp->lineno = @1.first_line;
$$ = tmp;
}
/* Modules can also take ports by port-name expressions. */
| IDENTIFIER '(' port_name_list ')'
{ lgate*tmp = new lgate;
tmp->name = $1;
tmp->parms_by_name = $3;
tmp->file = @1.text;
tmp->lineno = @1.first_line;
delete $1;
$$ = tmp;
}
;
gate_instance_list
: gate_instance_list ',' gate_instance
{ svector<lgate>*tmp1 = $1;
lgate*tmp2 = $3;
svector<lgate>*out = new svector<lgate> (*tmp1, *tmp2);
delete tmp1;
delete tmp2;
$$ = out;
}
| gate_instance
{ svector<lgate>*tmp = new svector<lgate>(1);
(*tmp)[0] = *$1;
delete $1;
$$ = tmp;
}
;
gatetype
: K_and { $$ = PGBuiltin::AND; }
| K_nand { $$ = PGBuiltin::NAND; }
| K_or { $$ = PGBuiltin::OR; }
| K_nor { $$ = PGBuiltin::NOR; }
| K_xor { $$ = PGBuiltin::XOR; }
| K_xnor { $$ = PGBuiltin::XNOR; }
| K_buf { $$ = PGBuiltin::BUF; }
| K_bufif0 { $$ = PGBuiltin::BUFIF0; }
| K_bufif1 { $$ = PGBuiltin::BUFIF1; }
| K_not { $$ = PGBuiltin::NOT; }
| K_notif0 { $$ = PGBuiltin::NOTIF0; }
| K_notif1 { $$ = PGBuiltin::NOTIF1; }
| K_nmos { $$ = PGBuiltin::NMOS; }
| K_rnmos { $$ = PGBuiltin::RNMOS; }
| K_pmos { $$ = PGBuiltin::PMOS; }
| K_rpmos { $$ = PGBuiltin::RPMOS; }
| K_cmos { $$ = PGBuiltin::CMOS; }