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Support unary + and - in constants.

This commit is contained in:
steve 2000-09-07 22:38:13 +00:00
parent e27934a577
commit d86b37d90f
2 changed files with 28 additions and 2 deletions
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6
PExpr.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: PExpr.h,v 1.41 2000/06/30 15:50:20 steve Exp $"
#ident "$Id: PExpr.h,v 1.42 2000/09/07 22:38:13 steve Exp $"
#endif
# include <string>
@ -260,6 +260,7 @@ class PEUnary : public PExpr {
Link::strength_t drive1) const;
virtual NetEUnary*elaborate_expr(Design*des, NetScope*) const;
virtual NetExpr*elaborate_pexpr(Design*des, NetScope*sc) const;
virtual verinum* eval_const(const Design*des, const string&path) const;
virtual bool is_constant(Module*) const;
@ -383,6 +384,9 @@ class PECallFunction : public PExpr {
/*
* $Log: PExpr.h,v $
* Revision 1.42 2000/09/07 22:38:13 steve
* Support unary + and - in constants.
*
* Revision 1.41 2000/06/30 15:50:20 steve
* Allow unary operators in constant expressions.
*

24
eval.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: eval.cc,v 1.14 2000/03/08 04:36:53 steve Exp $"
#ident "$Id: eval.cc,v 1.15 2000/09/07 22:38:13 steve Exp $"
#endif
# include "PExpr.h"
@ -141,9 +141,31 @@ verinum* PETernary::eval_const(const Design*des, const string&path) const
}
}
verinum* PEUnary::eval_const(const Design*des, const string&path) const
{
verinum*val = expr_->eval_const(des, path);
if (val == 0)
return 0;
switch (op_) {
case '+':
return val;
case '-':
*val = v_not(*val) + verinum(verinum::V1, 1);
return val;
}
delete val;
return 0;
}
/*
* $Log: eval.cc,v $
* Revision 1.15 2000/09/07 22:38:13 steve
* Support unary + and - in constants.
*
* Revision 1.14 2000/03/08 04:36:53 steve
* Redesign the implementation of scopes and parameters.
* I now generate the scopes and notice the parameters