668 lines
14 KiB
Plaintext
668 lines
14 KiB
Plaintext
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%{
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/*
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* Copyright (c) 1998 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if !defined(WINNT)
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#ident "$Id: parse.y,v 1.6 1998/11/23 00:20:23 steve Exp $"
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#endif
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# include "parse_misc.h"
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# include "pform.h"
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extern void lex_start_table();
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extern void lex_end_table();
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%}
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%union {
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string*text;
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list<string>*strings;
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lgate*gate;
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list<lgate>*gates;
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PExpr*expr;
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list<PExpr*>*exprs;
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NetNet::Type nettype;
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PGBuiltin::Type gatetype;
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NetNet::PortType porttype;
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PWire*wire;
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list<PWire*>*wires;
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PEventStatement*event_statement;
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Statement*statement;
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list<Statement*>*statement_list;
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verinum* number;
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};
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%token <text> IDENTIFIER SYSTEM_IDENTIFIER STRING
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%token <number> NUMBER
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%token K_LE K_GE K_EQ K_NE K_CEQ K_CNE
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%token K_always K_and K_assign K_begin K_buf K_bufif0 K_bufif1 K_case
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%token K_casex K_casez K_cmos K_deassign K_default K_defparam K_disable
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%token K_edge K_else K_end K_endcase K_endfunction K_endmodule
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%token K_endprimitive K_endspecify K_endtable K_endtask K_event K_for
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%token K_force K_forever K_fork K_function K_highz0 K_highz1 K_if
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%token K_initial K_inout K_input K_integer K_join K_large K_macromodule
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%token K_medium K_module K_nand K_negedge K_nmos K_nor K_not K_notif0
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%token K_notif1 K_or K_output K_pmos K_posedge K_primitive K_pull0
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%token K_pull1 K_pulldown K_pullup K_rcmos K_reg K_release K_repeat
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%token K_rnmos K_rpmos K_rtran K_rtranif0 K_rtranif1 K_scalered
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%token K_small K_specify
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%token K_specparam K_strong0 K_strong1 K_supply0 K_supply1 K_table K_task
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%token K_time K_tran K_tranif0 K_tranif1 K_tri K_tri0 K_tri1 K_triand
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%token K_trior K_vectored K_wait K_wand K_weak0 K_weak1 K_while K_wire
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%token K_wor K_xnor K_xor
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%token KK_attribute
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%type <text> identifier lvalue register_variable
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%type <strings> list_of_register_variables
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%type <strings> list_of_variables
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%type <wire> port
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%type <wires> list_of_ports list_of_ports_opt
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%type <gate> gate_instance
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%type <gates> gate_instance_list
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%type <expr> bitsel delay delay_opt expression expr_primary const_expression
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%type <exprs> expression_list
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%type <exprs> range range_opt
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%type <nettype> net_type
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%type <gatetype> gatetype
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%type <porttype> port_type
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%type <event_statement> event_control event_expression
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%type <statement> statement statement_opt
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%type <statement_list> statement_list
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%left UNARY_PREC
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%left '+' '-'
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%left K_GE K_LE '<' '>'
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%left K_EQ K_NE K_CEQ K_CNE
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%left '&'
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%left '^'
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%%
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source_file
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: description
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| source_file description
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;
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bitsel
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: '[' const_expression ']'
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{ $$ = $2; }
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;
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const_expression
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: NUMBER
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{ $$ = new PENumber($1);
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}
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| STRING
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{ $$ = new PEString(*$1);
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delete $1;
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}
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;
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delay
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: '#' NUMBER
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{ $$ = new PENumber($2);
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}
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| '#' IDENTIFIER
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{ $$ = new PEIdent(*$2);
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delete $2;
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}
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;
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delay_opt
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: delay { $$ = $1; }
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| { $$ = 0; }
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;
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description
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: module
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| udp_primitive
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;
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event_control
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: '@' IDENTIFIER
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{ yyerror(@1, "Sorry, event control not supported.");
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$$ = 0;
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}
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| '@' '(' event_expression ')'
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{ $$ = $3;
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}
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;
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event_expression
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: K_posedge expression
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{ $$ = new PEventStatement(NetPEvent::POSEDGE, $2);
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}
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| K_negedge expression
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{ $$ = new PEventStatement(NetPEvent::NEGEDGE, $2);
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}
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;
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expression
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: expr_primary
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{ $$ = $1; }
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| '(' expression ')'
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{ $$ = $2; }
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| '~' expression %prec UNARY_PREC
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{ $$ = new PEUnary('~', $2);
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}
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| '&' expression %prec UNARY_PREC
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{ $$ = new PEUnary('&', $2);
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}
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| expression '^' expression
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{ $$ = new PEBinary('^', $1, $3);
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}
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| expression '+' expression
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{ $$ = new PEBinary('+', $1, $3);
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}
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| expression '-' expression
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{ $$ = new PEBinary('-', $1, $3);
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}
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| expression '&' expression
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{ $$ = new PEBinary('&', $1, $3);
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}
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| expression K_EQ expression
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{ $$ = new PEBinary('e', $1, $3);
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}
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| expression K_CEQ expression
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{ $$ = new PEBinary('E', $1, $3);
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}
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| expression K_NE expression
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{ $$ = new PEBinary('n', $1, $3);
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}
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| expression K_CNE expression
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{ $$ = new PEBinary('N', $1, $3);
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}
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;
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expression_list
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: expression_list ',' expression
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{ list<PExpr*>*tmp = $1;
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tmp->push_back($3);
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$$ = tmp;
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}
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| expression
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{ list<PExpr*>*tmp = new list<PExpr*>;
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tmp->push_back($1);
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$$ = tmp;
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}
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| expression_list ','
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{ list<PExpr*>*tmp = $1;
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tmp->push_back(0);
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$$ = tmp;
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}
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;
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expr_primary
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: NUMBER
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{ $$ = new PENumber($1);
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}
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| STRING
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{ $$ = new PEString(*$1);
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delete $1;
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}
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| identifier
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{ $$ = new PEIdent(*$1);
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delete $1;
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}
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| SYSTEM_IDENTIFIER
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{ $$ = new PEIdent(*$1);
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delete $1;
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}
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| identifier '[' expression ']'
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{ PEIdent*tmp = new PEIdent(*$1);
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tmp->msb_ = $3;
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delete $1;
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$$ = tmp;
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}
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| identifier '[' expression ':' expression ']'
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{ PEIdent*tmp = new PEIdent(*$1);
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tmp->msb_ = $3;
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tmp->lsb_ = $5;
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delete $1;
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$$ = tmp;
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}
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;
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gate_instance
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: IDENTIFIER '(' expression_list ')'
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{ lgate*tmp = new lgate;
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tmp->name = *$1;
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tmp->parms = $3;
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delete $1;
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$$ = tmp;
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}
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| '(' expression_list ')'
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{ lgate*tmp = new lgate;
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tmp->name = "";
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tmp->parms = $2;
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$$ = tmp;
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}
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;
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gate_instance_list
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: gate_instance_list ',' gate_instance
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{ list<lgate>*tmp = $1;
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tmp->push_back(*$3);
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delete $3;
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$$ = tmp;
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}
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| gate_instance
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{ list<lgate>*tmp = new list<lgate>;
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tmp->push_back(*$1);
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delete $1;
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$$ = tmp;
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}
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;
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gatetype
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: K_and { $$ = PGBuiltin::AND; }
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| K_nand { $$ = PGBuiltin::NAND; }
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| K_or { $$ = PGBuiltin::OR; }
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| K_nor { $$ = PGBuiltin::NOR; }
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| K_xor { $$ = PGBuiltin::XOR; }
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| K_xnor { $$ = PGBuiltin::XNOR; }
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| K_buf { $$ = PGBuiltin::BUF; }
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| K_bufif0 { $$ = PGBuiltin::BUFIF0; }
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| K_bufif1 { $$ = PGBuiltin::BUFIF1; }
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| K_not { $$ = PGBuiltin::NOT; }
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| K_notif0 { $$ = PGBuiltin::NOTIF0; }
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| K_notif1 { $$ = PGBuiltin::NOTIF1; }
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| K_pulldown { $$ = PGBuiltin::PULLDOWN; }
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| K_pullup { $$ = PGBuiltin::PULLUP; }
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| K_nmos { $$ = PGBuiltin::NMOS; }
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| K_rnmos { $$ = PGBuiltin::RNMOS; }
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| K_pmos { $$ = PGBuiltin::PMOS; }
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| K_rpmos { $$ = PGBuiltin::RPMOS; }
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| K_cmos { $$ = PGBuiltin::CMOS; }
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| K_rcmos { $$ = PGBuiltin::RCMOS; }
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| K_tran { $$ = PGBuiltin::TRAN; }
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| K_rtran { $$ = PGBuiltin::RTRAN; }
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| K_tranif0 { $$ = PGBuiltin::TRANIF0; }
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| K_tranif1 { $$ = PGBuiltin::TRANIF1; }
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| K_rtranif0 { $$ = PGBuiltin::RTRANIF0; }
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| K_rtranif1 { $$ = PGBuiltin::RTRANIF1; }
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;
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identifier
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: identifier '.' IDENTIFIER
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{ yyerror(@1, "Sorry, qualified identifiers not supported.");
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$$ = $3;
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delete $1;
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}
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| IDENTIFIER
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{ $$ = $1; }
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;
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list_of_ports
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: port
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{ list<PWire*>*tmp = new list<PWire*>;
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tmp->push_back($1);
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$$ = tmp;
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}
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| list_of_ports ',' port
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{ list<PWire*>*tmp = $1;
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tmp->push_back($3);
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$$ = tmp;
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}
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;
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list_of_ports_opt
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: '(' list_of_ports ')' { $$ = $2; }
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| '(' ')' { $$ = 0; }
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| { $$ = 0; }
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;
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list_of_register_variables
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: register_variable
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{ list<string>*tmp = new list<string>;
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tmp->push_back(*$1);
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delete $1;
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$$ = tmp;
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}
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| list_of_register_variables ',' register_variable
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{ list<string>*tmp = $1;
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tmp->push_back(*$3);
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delete $3;
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$$ = tmp;
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}
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;
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list_of_variables
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: IDENTIFIER
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{ list<string>*tmp = new list<string>;
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tmp->push_back(*$1);
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delete $1;
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$$ = tmp;
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}
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| list_of_variables ',' IDENTIFIER
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{ list<string>*tmp = $1;
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tmp->push_back(*$3);
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delete $3;
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$$ = tmp;
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}
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;
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lvalue
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: identifier { $$ = $1; }
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;
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module
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: K_module IDENTIFIER list_of_ports_opt ';'
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{ pform_startmodule(*$2, $3);
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}
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module_item_list
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K_endmodule
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{ pform_endmodule(*$2);
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delete $2;
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}
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;
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module_item
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: net_type range_opt list_of_variables ';'
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{ pform_makewire($3, $1);
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if ($2) {
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pform_set_net_range($3, $2);
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delete $2;
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}
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delete $3;
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}
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| port_type range_opt list_of_variables ';'
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{ pform_set_port_type($3, $1);
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if ($2) {
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pform_set_net_range($3, $2);
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delete $2;
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}
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delete $3;
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}
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| K_reg range_opt list_of_register_variables ';'
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{ pform_makewire($3, NetNet::REG);
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if ($2) {
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pform_set_net_range($3, $2);
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delete $2;
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}
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delete $3;
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}
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| gatetype delay_opt gate_instance_list ';'
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{ pform_makegates($1, $2, $3);
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}
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| IDENTIFIER gate_instance_list ';'
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{ pform_make_modgates(*$1, $2);
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delete $1;
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}
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| K_assign IDENTIFIER '=' expression ';'
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{ pform_make_pgassign(*$2, $4);
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delete $2;
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}
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| K_assign IDENTIFIER bitsel '=' expression ';'
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{ pform_make_pgassign(*$2, $3, $5);
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delete $2;
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}
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| K_assign IDENTIFIER range '=' expression ';'
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{ pform_make_pgassign(*$2, $5);
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yyerror(@3, "Sorry, lvalue bit range not supported.");
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delete $2;
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delete $3;
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}
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| K_always statement
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{ pform_make_behavior(PProcess::PR_ALWAYS, $2);
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}
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| K_initial statement
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{ pform_make_behavior(PProcess::PR_INITIAL, $2);
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}
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| KK_attribute '(' IDENTIFIER ',' STRING ',' STRING ')' ';'
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{ pform_set_attrib(*$3, *$5, *$7);
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delete $3;
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delete $5;
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delete $7;
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}
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| KK_attribute '(' error ')' ';'
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{ yyerror(@1, "Misformed $attribute parameter list."); }
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;
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module_item_list
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: module_item_list module_item
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| module_item
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;
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net_type
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: K_wire { $$ = NetNet::WIRE; }
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| K_tri { $$ = NetNet::TRI; }
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| K_tri1 { $$ = NetNet::TRI1; }
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| K_supply0 { $$ = NetNet::SUPPLY0; }
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| K_wand { $$ = NetNet::WAND; }
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| K_triand { $$ = NetNet::TRIAND; }
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| K_tri0 { $$ = NetNet::TRI0; }
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| K_supply1 { $$ = NetNet::SUPPLY1; }
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| K_wor { $$ = NetNet::WOR; }
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| K_trior { $$ = NetNet::TRIOR; }
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;
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port
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: IDENTIFIER
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{ $$ = new PWire(*$1, NetNet::IMPLICIT);
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$$->port_type = NetNet::PIMPLICIT;
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delete $1;
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}
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| IDENTIFIER '[' const_expression ':' const_expression ']'
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{ $$ = new PWire(*$1, NetNet::IMPLICIT);
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$$->port_type = NetNet::PIMPLICIT;
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$$->msb = $3;
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$$->lsb = $5;
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delete $1;
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}
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| IDENTIFIER '[' error ']'
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{ yyerror(@1, "invalid port bit select");
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$$ = new PWire(*$1, NetNet::IMPLICIT);
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$$->port_type = NetNet::PIMPLICIT;
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delete $1;
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}
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;
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port_type
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: K_input { $$ = NetNet::PINPUT; }
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| K_output { $$ = NetNet::POUTPUT; }
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| K_inout { $$ = NetNet::PINOUT; }
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;
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range
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: '[' const_expression ':' const_expression ']'
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{ list<PExpr*>*tmp = new list<PExpr*>;
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tmp->push_back($2);
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tmp->push_back($4);
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$$ = tmp;
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}
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;
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range_opt
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: range
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| { $$ = 0; }
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;
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register_variable
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: IDENTIFIER
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{ $$ = $1; }
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| IDENTIFIER '[' error ']'
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{ yyerror(@1, "Sorry, register regions not implemented.");
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$$ = $1;
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}
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;
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statement
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: K_begin statement_list K_end
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{ $$ = pform_make_block(PBlock::BL_SEQ, $2); }
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| K_fork statement_list K_join
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{ $$ = pform_make_block(PBlock::BL_PAR, $2); }
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| K_begin K_end
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{ $$ = pform_make_block(PBlock::BL_SEQ, 0); }
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| K_fork K_join
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{ $$ = pform_make_block(PBlock::BL_PAR, 0); }
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| K_if '(' expression ')' statement_opt
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{ PCondit*tmp = new PCondit($3, $5, 0);
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$$ = tmp;
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}
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| K_if '(' expression ')' statement_opt K_else statement_opt
|
|
{ PCondit*tmp = new PCondit($3, $5, $7);
|
|
$$ = tmp;
|
|
}
|
|
| K_if '(' error ')' statement_opt
|
|
{ yyerror(@1, "Malformed conditional expression.");
|
|
$$ = $5;
|
|
}
|
|
| K_if '(' error ')' statement_opt K_else statement_opt
|
|
{ yyerror(@1, "Malformed conditional expression.");
|
|
$$ = $5;
|
|
}
|
|
| K_for '(' lvalue '=' expression ';' expression ';'
|
|
lvalue '=' expression ')' statement
|
|
{ $$ = new PForStatement(*$3, $5, $7, *$9, $11, $13);
|
|
delete $3;
|
|
delete $9;
|
|
}
|
|
| K_for '(' lvalue '=' expression ';' expression ';'
|
|
error ')' statement
|
|
{ $$ = 0;
|
|
yyerror(@9, "Error in for loop step assigment.");
|
|
}
|
|
| K_for '(' lvalue '=' expression ';' error ';'
|
|
lvalue '=' expression ')' statement
|
|
{ $$ = 0;
|
|
yyerror(@7, "Error in for loop condition expression.");
|
|
}
|
|
| K_for '(' error ')' statement
|
|
{ $$ = 0;
|
|
yyerror(@3, "Incomprehensible for loop.");
|
|
}
|
|
| K_while '(' expression ')' statement
|
|
{ PWhile*tmp = new PWhile($3, $5);
|
|
$$ = tmp;
|
|
}
|
|
| K_while '(' error ')' statement
|
|
{ $$ = 0;
|
|
yyerror(@3, "Error in while loop condition.");
|
|
}
|
|
| delay statement_opt
|
|
{ PDelayStatement*tmp = new PDelayStatement($1, $2);
|
|
$$ = tmp;
|
|
}
|
|
| event_control statement_opt
|
|
{ PEventStatement*tmp = $1;
|
|
tmp->set_statement($2);
|
|
$$ = tmp;
|
|
}
|
|
| lvalue '=' expression ';'
|
|
{ $$ = pform_make_assignment($1, $3);
|
|
}
|
|
| lvalue K_LE expression ';'
|
|
{ $$ = pform_make_assignment($1, $3);
|
|
yyerror(@1, "Sorry, non-blocking assignment not implemented.");
|
|
}
|
|
| K_wait '(' expression ')' statement_opt
|
|
{ PEventStatement*tmp;
|
|
tmp = new PEventStatement(NetPEvent::POSITIVE, $3);
|
|
tmp->set_statement($5);
|
|
$$ = tmp;
|
|
}
|
|
| SYSTEM_IDENTIFIER '(' expression_list ')' ';'
|
|
{ $$ = pform_make_calltask($1, $3);
|
|
}
|
|
| SYSTEM_IDENTIFIER ';'
|
|
{ $$ = pform_make_calltask($1);
|
|
}
|
|
| error ';'
|
|
{ yyerror(@1, "malformed statement");
|
|
$$ = new PNoop;
|
|
}
|
|
;
|
|
|
|
statement_list
|
|
: statement_list statement
|
|
{ list<Statement*>*tmp = $1;
|
|
tmp->push_back($2);
|
|
$$ = tmp;
|
|
}
|
|
| statement
|
|
{ list<Statement*>*tmp = new list<Statement*>();
|
|
tmp->push_back($1);
|
|
$$ = tmp;
|
|
}
|
|
;
|
|
|
|
statement_opt
|
|
: statement
|
|
| ';' { $$ = 0; }
|
|
;
|
|
|
|
udp_body
|
|
: K_table { lex_start_table(); }
|
|
udp_comb_entry_list
|
|
K_endtable { lex_end_table(); }
|
|
;
|
|
|
|
udp_comb_entry
|
|
: udp_input_list ':' udp_output_sym ';'
|
|
;
|
|
|
|
udp_comb_entry_list
|
|
: udp_comb_entry
|
|
| udp_comb_entry_list udp_comb_entry
|
|
;
|
|
|
|
udp_input_list
|
|
: udp_input_sym
|
|
| udp_input_list udp_input_sym
|
|
;
|
|
|
|
udp_input_sym : '0' | '1' | 'x' | 'X' | '?' | 'b' | 'B' ;
|
|
udp_output_sym : '0' | '1' | 'x' | 'X' ;
|
|
|
|
udp_port_decl
|
|
: K_input list_of_variables ';'
|
|
| K_output IDENTIFIER ';'
|
|
;
|
|
|
|
udp_port_decls
|
|
: udp_port_decl
|
|
| udp_port_decls udp_port_decl
|
|
;
|
|
|
|
udp_port_list
|
|
: IDENTIFIER { ; }
|
|
| udp_port_list ',' IDENTIFIER { ; }
|
|
;
|
|
|
|
udp_primitive
|
|
: K_primitive IDENTIFIER '(' udp_port_list ')' ';'
|
|
udp_port_decls
|
|
udp_body
|
|
K_endprimitive
|
|
{ yyerror(@1, "Sorry, UDP primitives not supported."); }
|
|
;
|