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Fix module parameter override syntax.

This commit is contained in:
steve 2000-01-01 23:47:58 +00:00
parent cbd353fbb8
commit 7e37b61a05
2 changed files with 28 additions and 4 deletions
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20
parse.y
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: parse.y,v 1.79 1999/12/31 17:39:00 steve Exp $"
#ident "$Id: parse.y,v 1.80 2000/01/01 23:47:58 steve Exp $"
#endif
# include "parse_misc.h"
@ -127,7 +127,7 @@ extern void lex_end_table();
%type <expr> expression expr_primary
%type <expr> lavalue lpvalue
%type <expr> delay_value
%type <exprs> delay1 delay3 delay3_opt
%type <exprs> delay1 delay3 delay3_opt parameter_value_opt
%type <exprs> expression_list
%type <exprs> assign assign_list
@ -1088,7 +1088,7 @@ module_item
| gatetype delay3_opt gate_instance_list ';'
{ pform_makegates($1, $2, $3);
}
| IDENTIFIER delay3_opt gate_instance_list ';'
| IDENTIFIER parameter_value_opt gate_instance_list ';'
{ pform_make_modgates($1, $2, $3);
delete $1;
}
@ -1217,6 +1217,20 @@ parameter_assign_list
| parameter_assign_list ',' parameter_assign
;
/* The parameters of a module instance can be overridden by writing
a list of expressions in a syntax much line a delay list. (The
difference being the list can have any length.) The pform that
attaches the expression list to the module checks that the
expressions are constant. */
parameter_value_opt
: '#' '(' expression_list ')'
{ $$ = $3; }
|
{ $$ = 0; }
;
/* The port (of a module) is a fairle complex item. Each port is
handled as a Module::port_t object. A simple port reference has a
name and a PWire object, but more complex constructs are possible

12
pform.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: pform.cc,v 1.49 1999/12/30 19:06:14 steve Exp $"
#ident "$Id: pform.cc,v 1.50 2000/01/01 23:47:58 steve Exp $"
#endif
# include "compiler.h"
@ -355,6 +355,13 @@ void pform_make_modgates(const string&type,
svector<PExpr*>*overrides,
svector<lgate>*gates)
{
for (unsigned idx = 0 ; idx < overrides->count() ; idx += 1)
if (! pform_expression_is_constant((*overrides)[idx])) {
VLerror("error: Parameter override expression"
" must be constant.");
return;
}
for (unsigned idx = 0 ; idx < gates->count() ; idx += 1) {
lgate cur = (*gates)[idx];
@ -765,6 +772,9 @@ int pform_parse(const char*path, map<string,Module*>&modules,
/*
* $Log: pform.cc,v $
* Revision 1.50 2000/01/01 23:47:58 steve
* Fix module parameter override syntax.
*
* Revision 1.49 1999/12/30 19:06:14 steve
* Support reg initial assignment syntax.
*