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Resize constants in eval_expr when needed. 

If we are given an unsized constant that is smaller then the requested
width then resize the constant to fit.
This commit is contained in:
Cary R 2010-09-13 15:45:19 -07:00 committed by Stephen Williams
parent 4001c7a27f
commit acb55916da
1 changed files with 8 additions and 1 deletions
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9
netmisc.cc
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@ -289,8 +289,15 @@ NetExpr* elab_and_eval(Design*des, NetScope*scope,
void eval_expr(NetExpr*&expr, int prune_width) void eval_expr(NetExpr*&expr, int prune_width)
{ {
assert(expr); assert(expr);
if (dynamic_cast<NetEConst*>(expr)) return;
if (dynamic_cast<NetECReal*>(expr)) return; if (dynamic_cast<NetECReal*>(expr)) return;
/* Resize a constant if allowed and needed. */
if (NetEConst *tmp = dynamic_cast<NetEConst*>(expr)) {
if (prune_width <= 0) return;
if (tmp->has_width()) return;
if ((unsigned)prune_width <= tmp->expr_width()) return;
expr = pad_to_width(expr, (unsigned)prune_width, *expr);
return;
}
NetExpr*tmp = expr->eval_tree(prune_width); NetExpr*tmp = expr->eval_tree(prune_width);
if (tmp != 0) { if (tmp != 0) {