void operator () (Eval &eval,StepId dep,Expr::Mul *ptr)
{
auto step=eval.createStep(MulStep(ret),dep);
eval.createStep(ExprStep(ptr->arg1,step.obj.arg1),step.id);
eval.createStep(ExprStep(ptr->arg2,step.obj.arg2),step.id);
}
void operator () (Eval &eval,StepId dep,Expr::Var *ptr)
{
ulen index=ptr->index;
Var &var=eval->table[index];
#if 1
var.gate->createStep(GetVarStep(var.value,ret),dep);
#else
auto step=eval.createStep(GetVarStep(var.value,ret),dep);
var.gate->delay(step.id);
#endif
}
void operator () (Eval &eval,StepId dep,Expr::Neg *ptr)
{
auto step=eval.createStep(NegStep(ret),dep);
eval.createStep(ExprStep(ptr->arg,step.obj.arg),step.id);
}