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Make sure divide expressions are evaluated using the expression width. 

The operands of divide need to be at least the width of the expression
when calculating a constant divide. The only matters for the special
case where the result is x, because the verinum implementation of
divide will get the result width from the left expression width.
This commit is contained in:
Stephen Williams 2008-10-27 21:39:07 -07:00
parent 27410f5d88
commit 94e7d71b97
1 changed files with 4 additions and 2 deletions
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6
eval_tree.cc
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@ -858,8 +858,10 @@ NetExpr* NetEBDiv::eval_tree(int prune_to_width)
NetEConst*rc = dynamic_cast<NetEConst*>(right_);
if (rc == 0) return 0;
verinum lval = lc->value();
verinum rval = rc->value();
// Make sure the expression is evaluated at the
// expression width.
verinum lval = pad_to_width(lc->value(), expr_width());
verinum rval = pad_to_width(rc->value(), expr_width());
NetExpr*tmp = 0;
switch (op_) {