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Minor improvements to $bits implementation 

Signed-off-by: Stephen Williams <steve@icarus.com>
This commit is contained in:
Stephen Williams 2007-07-17 18:05:48 -07:00
parent 7aa323bcbf
commit 6b0c62c9c4
1 changed files with 13 additions and 4 deletions
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17
elab_expr.cc
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@ -368,11 +368,20 @@ NetExpr* PECallFunction::elaborate_sfunc_(Design*des, NetScope*scope) const
<< " Use $bits() instead." << endl; << " Use $bits() instead." << endl;
PExpr*expr = parms_[0]; PExpr*expr = parms_[0];
NetExpr*sub = expr->elaborate_expr(des, scope, -1, true); ivl_assert(*this, expr);
verinum val (sub->expr_width(), 8*sizeof(unsigned));
delete sub;
sub = new NetEConst(val); /* Elaborate the sub-expression to get its
self-determined width, and save that width. Then
delete the expression because we don't really want
the expression itself. */
long sub_expr_width = 0;
if (NetExpr*tmp = expr->elaborate_expr(des, scope, -1, true)) {
sub_expr_width = tmp->expr_width();
delete tmp;
}
verinum val (sub_expr_width, 8*sizeof(unsigned));
NetEConst*sub = new NetEConst(val);
sub->set_line(*this); sub->set_line(*this);
return sub; return sub;