Ejemplo n.º 1
0
        private static void ConnectIO(VisitHelper helper, GraphFIR.IO.FIRIO from, GraphFIR.IO.FIRIO to, bool isPartial, bool canBeConditional = true)
        {
            GraphFIR.Module fromMod = from.GetModResideIn();
            GraphFIR.Module toMod   = to.GetModResideIn();

            //If going from inside to outside or outside to outside
            //then add condition to that connection if currently in
            //conditional module.
            GraphFIR.IO.Output condition = null;
            if (canBeConditional &&
                ((fromMod == helper.Mod && toMod != helper.Mod) ||
                 (fromMod != helper.Mod && toMod != helper.Mod)))
            {
                condition = helper.Mod.EnableCon;
            }

            from.ConnectToInput(to, isPartial, false, condition);

            //If writing to a memory ports data in high level firrtl, then
            //the mask also has to be set to true for the part of the port data
            //that was written to.
            if (GraphFIR.IO.IOHelper.TryGetParentMemPort(to, out var memPort) &&
                memPort.FromHighLevelFIRRTL &&
                GraphFIR.IO.IOHelper.IsIOInMaskableMemPortData(to, memPort))
            {
                var scopeEnableCond = helper.ScopeEnabledCond;
                foreach (GraphFIR.IO.Input dataInputWrittenTo in to.Flatten())
                {
                    var dataInputMask = memPort.GetMaskFromDataInput(dataInputWrittenTo);
                    scopeEnableCond.ConnectToInput(dataInputMask, false, false, scopeEnableCond);
                }
            }
        }
Ejemplo n.º 2
0
 public void EnterEnabledScope(GraphFIR.IO.Output enableCond)
 {
     ScopeEnabledConditions.Push(enableCond);
 }
Ejemplo n.º 3
0
        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);
        }
Ejemplo n.º 4
0
        private static void VisitStatement(VisitHelper helper, FIRRTL.Statement statement)
        {
            if (statement is FIRRTL.EmptyStmt)
            {
                return;
            }
            else if (statement is FIRRTL.Block block)
            {
                for (int i = 0; i < block.Statements.Count; i++)
                {
                    VisitStatement(helper, block.Statements[i]);
                }
            }
            else if (statement is FIRRTL.Conditionally conditional)
            {
                VisitConditional(helper, conditional);
            }
            else if (statement is FIRRTL.Stop stop)
            {
                var clock  = (GraphFIR.IO.Output)VisitExp(helper, stop.Clk, GraphFIR.IO.IOGender.Male);
                var enable = (GraphFIR.IO.Output)VisitExp(helper, stop.Enabled, GraphFIR.IO.IOGender.Male);

                var firStop = new GraphFIR.FirStop(clock, enable, stop.Ret, stop);
                helper.AddNodeToModule(firStop);
            }
            else if (statement is FIRRTL.Attach)
            {
                return;

                throw new NotImplementedException();
            }
            else if (statement is FIRRTL.Print)
            {
                return;

                throw new NotImplementedException();
            }
            else if (statement is FIRRTL.Verification)
            {
                return;

                throw new NotImplementedException();
            }
            else if (statement is FIRRTL.Connect connect)
            {
                VisitConnect(helper, connect.Expr, connect.Loc, false);
            }
            else if (statement is FIRRTL.PartialConnect parConnected)
            {
                VisitConnect(helper, parConnected.Expr, parConnected.Loc, true);
            }
            else if (statement is FIRRTL.IsInvalid)
            {
                return;

                throw new NotImplementedException();
            }
            else if (statement is FIRRTL.CDefMemory cmem)
            {
                //If have access to low firrth graph then get memory definition
                //from it as it includes all port definitions. This avoids having
                //to infer memory port types.
                if (helper.HasLowFirGraph())
                {
                    var lowFirMem = (FIRRTL.DefMemory)helper.GetDefNodeFromLowFirrtlGraph(cmem.Name);
                    VisitStatement(helper, lowFirMem);

                    //Low level firrtl addresses the ports through the memory but
                    //high level firrtl directly addreses the ports. Need to
                    //make the ports directly addresseable which is why this is done.
                    var lowMem = (GraphFIR.IO.MemoryIO)helper.Mod.GetIO(cmem.Name);
                    foreach (GraphFIR.IO.MemPort port in lowMem.GetAllPorts())
                    {
                        port.FromHighLevelFIRRTL = true;
                        helper.Mod.AddMemoryPort(port);
                    }
                }
                else
                {
                    GraphFIR.IO.FIRIO inputType = VisitTypeAsPassive(helper, FIRRTL.Dir.Input, null, cmem.Type);
                    var memory = new GraphFIR.Memory(cmem.Name, inputType, cmem.Size, 0, 0, cmem.Ruw, cmem);

                    helper.AddNodeToModule(memory);
                }
            }
            else if (statement is FIRRTL.CDefMPort memPort)
            {
                var memory = (GraphFIR.IO.MemoryIO)helper.Mod.GetIO(memPort.Mem);

                //Port may already have been created if the memory used the low firrtl
                //memory definition which contain all ports that will be used
                GraphFIR.IO.MemPort port;
                if (memory.TryGetIO(memPort.Name, out var existingPort))
                {
                    port = (GraphFIR.IO.MemPort)existingPort;
                }
                else
                {
                    port = memPort.Direction switch
                    {
                        FIRRTL.MPortDir.MInfer => throw new NotImplementedException(),
                              FIRRTL.MPortDir.MRead => memory.AddReadPort(memPort.Name),
                              FIRRTL.MPortDir.MWrite => memory.AddWritePort(memPort.Name),
                              FIRRTL.MPortDir.MReadWrite => memory.AddReadWritePort(memPort.Name),
                              var error => throw new Exception($"Unknown memory port type. Type: {error}")
                    };

                    port.FromHighLevelFIRRTL = true;
                    helper.Mod.AddMemoryPort(port);
                }

                ConnectIO(helper, VisitExp(helper, memPort.Exps[0], GraphFIR.IO.IOGender.Male), port.Address, false);
                ConnectIO(helper, VisitExp(helper, memPort.Exps[1], GraphFIR.IO.IOGender.Male), port.Clock, false, false);
                ConnectIO(helper, helper.ScopeEnabledCond, port.Enabled, false);

                //if port has mask then by default set whole mask to true
                if (port.HasMask())
                {
                    GraphFIR.IO.FIRIO  mask   = port.GetMask();
                    GraphFIR.IO.Output const1 = (GraphFIR.IO.Output)VisitExp(helper, new FIRRTL.UIntLiteral(0, 1), GraphFIR.IO.IOGender.Male);
                    foreach (var maskInput in mask.Flatten())
                    {
                        ConnectIO(helper, const1, maskInput, false);
                    }
                }
            }
            else if (statement is FIRRTL.DefWire defWire)
            {
                GraphFIR.IO.FIRIO inputType = VisitTypeAsPassive(helper, FIRRTL.Dir.Output, null, defWire.Type);
                inputType = inputType.ToFlow(GraphFIR.IO.FlowChange.Sink, null);
                GraphFIR.Wire wire = new GraphFIR.Wire(defWire.Name, inputType, defWire);

                helper.AddNodeToModule(wire);
            }
            else if (statement is FIRRTL.DefRegister reg)
            {
                GraphFIR.IO.Output clock     = (GraphFIR.IO.Output)VisitExp(helper, reg.Clock, GraphFIR.IO.IOGender.Male);
                GraphFIR.IO.Output reset     = null;
                GraphFIR.IO.FIRIO  initValue = null;

                if (reg.HasResetAndInit())
                {
                    reset     = (GraphFIR.IO.Output)VisitExp(helper, reg.Reset, GraphFIR.IO.IOGender.Male);
                    initValue = VisitExp(helper, reg.Init, GraphFIR.IO.IOGender.Male);
                }

                GraphFIR.IO.FIRIO inputType = VisitTypeAsPassive(helper, FIRRTL.Dir.Input, null, reg.Type);
                GraphFIR.Register register  = new GraphFIR.Register(reg.Name, inputType, clock, reset, initValue, reg);
                helper.AddNodeToModule(register);
            }
            else if (statement is FIRRTL.DefInstance instance)
            {
                GraphFIR.Module mod = VisitModule(helper, instance.Name, helper.ModuleRoots[instance.Module]);
                helper.AddNodeToModule(mod);
            }
            else if (statement is FIRRTL.DefNode node)
            {
                var nodeOut = VisitExp(helper, node.Value, GraphFIR.IO.IOGender.Male);

                if (node.Value is not FIRRTL.RefLikeExpression)
                {
                    nodeOut.SetName(node.Name);
                }

                helper.Mod.AddIORename(node.Name, nodeOut);
            }
            else if (statement is FIRRTL.DefMemory mem)
            {
                GraphFIR.IO.FIRIO inputType = VisitTypeAsPassive(helper, FIRRTL.Dir.Input, null, mem.Type);
                var memory = new GraphFIR.Memory(mem.Name, inputType, mem.Depth, mem.ReadLatency, mem.WriteLatency, mem.Ruw, mem);

                foreach (var portName in mem.Readers)
                {
                    memory.AddReadPort(portName);
                }
                foreach (var portName in mem.Writers)
                {
                    memory.AddWritePort(portName);
                }
                foreach (var portName in mem.ReadWriters)
                {
                    memory.AddReadWritePort(portName);
                }

                helper.AddNodeToModule(memory);
            }
            else
            {
                throw new NotImplementedException();
            }
        }
Ejemplo n.º 5
0
 public Connection(Output from)
 {
     this.From      = from;
     this.Condition = null;
 }
Ejemplo n.º 6
0
 public Connection(Output from, Output condition)
 {
     this.From      = from;
     this.Condition = condition;
 }
Ejemplo n.º 7
0
 public override void ConnectToInput(FIRIO input, bool allowPartial = false, bool asPassive = false, Output condition = null)
 {
     throw new Exception("Duplex can't be connected to anything.");
 }