internal string GetUniqueName()
{
if (RootHelper != null)
{
return(RootHelper.GetUniqueName());
}
else
{
return($"~{UniqueNumber++}");
}
}
private static void VisitConditional(VisitHelper parentHelper, FIRRTL.Conditionally conditional)
{
GraphFIR.Conditional cond = new GraphFIR.Conditional(conditional);
void AddCondModule(GraphFIR.IO.Output ena, FIRRTL.Statement body)
{
VisitHelper helper = parentHelper.ForNewCondModule(parentHelper.GetUniqueName(), null);
var internalEnaDummy = new GraphFIR.DummyPassthrough(ena);
var internalUseEna = new GraphFIR.DummySink(internalEnaDummy.Result);
helper.AddNodeToModule(internalEnaDummy);
helper.AddNodeToModule(internalUseEna);
helper.Mod.SetEnableCond(internalEnaDummy.Result);
//Set signal that enables this scope as things like memory
//ports need it
helper.EnterEnabledScope(internalEnaDummy.Result);
//Fill out module
VisitStatement(helper, body);
cond.AddConditionalModule(internalEnaDummy.InIO, helper.Mod);
helper.ExitEnabledScope();
}
GraphFIR.IO.Output enableCond = (GraphFIR.IO.Output)VisitExp(parentHelper, conditional.Pred, GraphFIR.IO.IOGender.Male);
if (conditional.HasIf())
{
GraphFIR.IO.Output ifEnableCond = enableCond;
if (parentHelper.Mod.IsConditional)
{
GraphFIR.FIRAnd chainConditions = new GraphFIR.FIRAnd(parentHelper.Mod.EnableCon, enableCond, new FIRRTL.UIntType(1), null);
parentHelper.AddNodeToModule(chainConditions);
ifEnableCond = chainConditions.Result;
}
AddCondModule(ifEnableCond, conditional.WhenTrue);
}
if (conditional.HasElse())
{
GraphFIR.FIRNot notEnableComponent = new GraphFIR.FIRNot(enableCond, new FIRRTL.UIntType(1), null);
parentHelper.AddNodeToModule(notEnableComponent);
GraphFIR.IO.Output elseEnableCond = notEnableComponent.Result;
if (parentHelper.Mod.IsConditional)
{
GraphFIR.FIRAnd chainConditions = new GraphFIR.FIRAnd(parentHelper.Mod.EnableCon, elseEnableCond, new FIRRTL.UIntType(1), null);
parentHelper.AddNodeToModule(chainConditions);
elseEnableCond = chainConditions.Result;
}
AddCondModule(elseEnableCond, conditional.Alt);
}
parentHelper.AddNodeToModule(cond);
}
