public override bool Rewrite(CodeDescriptor decompilee, MethodBase callee, StackElement[] args, IDecompiler stack, IFunctionBuilder builder)
{
var stateLookup = stack.QueryAttribute <IStateLookup>();
if (stateLookup == null)
{
var pd = decompilee as ProcessDescriptor;
if (pd == null)
{
var md = decompilee as MethodDescriptor;
if (md == null)
{
throw new InvalidOperationException("Unsupported code descriptor: " + decompilee);
}
pd = md.CallingProcess;
}
var pred = pd.Instance.Predicate;
var predElem = stack.GetCallExpression(
pred.Method, new StackElement(LiteralReference.CreateConstant(pred.Target), pred.Target, EVariability.Constant));
var fspec = new FunctionSpec(typeof(void))
{
CILRep = callee,
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitUntil)
};
builder.Call(fspec, new Expression[] { predElem.Expr });
}
else
{
builder.Store(
stateLookup.NextStateSignal,
stateLookup.GetStateExpression(stack.CurrentILIndex));
builder.Return();
}
return(true);
}
public override bool Rewrite(
CodeDescriptor decompilee,
Expression waitObject,
Analysis.IDecompiler stack,
IFunctionBuilder builder)
{
var fspec = new FunctionSpec(typeof(void))
{
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitFor)
};
builder.Call(fspec, waitObject);
return(true);
}
public override bool Rewrite(Meta.CodeDescriptor decompilee, SysDOM.Expression waitObject, Analysis.IDecompiler stack, SysDOM.IFunctionBuilder builder)
{
var evt = waitObject.ResultType.GetSampleInstance();
var sevent = evt as Event;
if (sevent == null)
{
// This workaround is for the following situation:
// Signal s;
// await s;
// This will actually await the "changed event" which is associated with the signal. However, decompilation
// will treat the signal instance as the awaited object and pass a Signal instance instead of the event.
// The code will try to restore the Event instance from the Awaiter.
Awaiter awaiter = null;
try
{
awaiter = ((object)AwaitableExtensionMethods.GetAwaiter((dynamic)evt)) as Awaiter;
}
catch
{
}
if (awaiter == null)
{
throw new InvalidOperationException("Unable to resolve awaited MultiEvent");
}
sevent = awaiter._event;
}
var signal = (SignalBase)sevent.Owner;
var signalRef = SignalRef.Create(signal, SignalRef.EReferencedProperty.Instance);
var arg = (LiteralReference)signalRef;
var fspec = new FunctionSpec(typeof(void))
{
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitOn)
};
builder.Call(fspec, arg);
return(true);
}
public override bool Rewrite(Meta.CodeDescriptor decompilee, SysDOM.Expression waitObject, Analysis.IDecompiler stack, SysDOM.IFunctionBuilder builder)
{
var evt = waitObject.ResultType.GetSampleInstance();
var mevent = evt as MultiEvent;
if (mevent == null)
{
throw new InvalidOperationException("Unable to resolve awaited MultiEvent");
}
var events = mevent._events.Cast <Event>();
var signals = events.Select(e => (SignalBase)e.Owner);
var signalRefs = signals.Select(s => SignalRef.Create(s, SignalRef.EReferencedProperty.Instance));
var args = signalRefs.Select(sr => (LiteralReference)sr).ToArray();
var fspec = new FunctionSpec(typeof(void))
{
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitOn)
};
builder.Call(fspec, args);
return(true);
}
public override bool Rewrite(Meta.CodeDescriptor decompilee, SysDOM.Expression waitObject, Analysis.IDecompiler stack, SysDOM.IFunctionBuilder builder)
{
var evt = waitObject.ResultType.GetSampleInstance();
var peevent = evt as PredicatedEvent;
if (peevent == null)
{
throw new InvalidOperationException("Unable to resolve awaited PredicatedEvent");
}
var pred = peevent._pred;
var rwc = pred.Method.GetCustomOrInjectedAttribute <RewriteCall>();
if (rwc == null)
{
throw new InvalidOperationException("Awaited predicate is not synthesizable.");
}
var lr = LiteralReference.CreateConstant(pred.Target);
var se = new StackElement(lr, pred.Target, Analysis.Msil.EVariability.Constant);
var pstk = stack.CreatePrivateStack();
if (!rwc.Rewrite(decompilee, pred.Method, new StackElement[] { se }, pstk, builder))
{
throw new InvalidOperationException("Unable to implement awaited predicate.");
}
var predEx = pstk.Pop();
var fspec = new FunctionSpec(typeof(void))
{
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitUntil)
};
builder.Call(fspec, predEx.Expr);
return(true);
}
public override bool Rewrite(CodeDescriptor decompilee, Expression waitObject, IDecompiler stack, IFunctionBuilder builder)
{
if (stack.HasAttribute <Analysis.M2M.HLS>())
{
return(true);
}
var curps = DesignContext.Instance.CurrentProcess;
SLSignal clk = (SLSignal)curps.Sensitivity[0].Owner;
SignalRef srEdge;
if (curps.Predicate.Equals((Func <bool>)clk.RisingEdge))
{
srEdge = SignalRef.Create(clk.Descriptor, SignalRef.EReferencedProperty.RisingEdge);
}
else
{
srEdge = SignalRef.Create(clk.Descriptor, SignalRef.EReferencedProperty.FallingEdge);
}
var lrEdge = new LiteralReference(srEdge);
int nwait = 0;
var nwaitEx = waitObject.Children[0];
bool nwaitConst = nwaitEx.IsConst();
if (nwaitConst)
{
nwait = (int)TypeConversions.ConvertValue(
nwaitEx.Eval(DefaultEvaluator.DefaultConstEvaluator),
typeof(int));
}
var fspec = new FunctionSpec(typeof(void))
{
IntrinsicRep = IntrinsicFunctions.Wait(WaitParams.EWaitKind.WaitUntil)
};
Variable v = null;
LiteralReference lrV = null;
if (!nwaitConst || nwait > 3)
{
v = new Variable(typeof(int))
{
Name = "_wait_i" + (ictr++)
};
builder.DeclareLocal(v);
lrV = new LiteralReference(v);
builder.Store(v, LiteralReference.CreateConstant((int)0));
var loop = builder.Loop();
builder.If(Expression.Equal(lrV, nwaitEx));
{
builder.Break(loop);
}
builder.EndIf();
}
int ncalls = 1;
if (nwaitConst && nwait <= 3)
{
ncalls = nwait;
}
for (int i = 0; i < ncalls; i++)
{
builder.Call(fspec, lrEdge);
}
if (!nwaitConst || nwait > 3)
{
builder.Store(v, lrV + LiteralReference.CreateConstant((int)1));
builder.EndLoop();
}
return(true);
}