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Add support for unary +/- in real parameter evaluation. 

This patch adds support for unary + and - of real value constants
to the eval_tree() functionality.
This commit is contained in:
Cary R 2008-02-19 17:52:01 -08:00 committed by Stephen Williams
parent 538d3d1f4d
commit 3716e972ec
2 changed files with 30 additions and 4 deletions
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27
eval_tree.cc
View File

@ -1483,6 +1483,8 @@ void NetEUnary::eval_expr_()
assert(expr_);
if (dynamic_cast<NetEConst*>(expr_))
return;
if (dynamic_cast<NetECReal*>(expr_))
return;
NetExpr*oper = expr_->eval_tree();
if (oper == 0)
@ -1492,9 +1494,30 @@ void NetEUnary::eval_expr_()
expr_ = oper;
}
NetEConst* NetEUnary::eval_tree(int prune_to_width)
NetExpr* NetEUnary::eval_tree_real_()
{
NetECReal*val= dynamic_cast<NetECReal*> (expr_), *res;
if (val == 0) return 0;
switch (op_) {
case '+':
res = new NetECReal(val->value());
res->set_line(*this);
return res;
case '-':
res = new NetECReal(-(val->value()));
res->set_line(*this);
return res;
default:
return 0;
}
}
NetExpr* NetEUnary::eval_tree(int prune_to_width)
{
eval_expr_();
if (expr_type() == IVL_VT_REAL) return eval_tree_real_();
NetEConst*rval = dynamic_cast<NetEConst*>(expr_);
if (rval == 0)
return 0;
@ -1549,7 +1572,7 @@ NetEConst* NetEUnary::eval_tree(int prune_to_width)
}
NetEConst* NetEUBits::eval_tree(int prune_to_width)
NetExpr* NetEUBits::eval_tree(int prune_to_width)
{
return NetEUnary::eval_tree(prune_to_width);
}

7
netlist.h
View File

@ -3138,7 +3138,7 @@ class NetEUnary : public NetExpr {
virtual bool set_width(unsigned w, bool last_chance);
virtual NetEUnary* dup_expr() const;
virtual NetEConst* eval_tree(int prune_to_width = -1);
virtual NetExpr* eval_tree(int prune_to_width = -1);
virtual ivl_variable_type_t expr_type() const;
virtual NexusSet* nex_input(bool rem_out = true);
@ -3150,6 +3150,9 @@ class NetEUnary : public NetExpr {
NetExpr* expr_;
void eval_expr_();
private:
virtual NetExpr* eval_tree_real_();
};
class NetEUBits : public NetEUnary {
@ -3160,7 +3163,7 @@ class NetEUBits : public NetEUnary {
virtual NetNet* synthesize(Design*);
virtual NetEConst* eval_tree(int prune_to_width = -1);
virtual NetExpr* eval_tree(int prune_to_width = -1);
virtual ivl_variable_type_t expr_type() const;
};