+-- Expands the construction of a tuple into VHDL
+expandBuildTupleExpr ::
+ [(CoreBndr, SignalNameMap AST.VHDLId)]
+ -- A list of bindings in effect
+ -> [CoreExpr] -- A list of expressions to put in the tuple
+ -> VHDLState ( [AST.SigDec], [AST.ConcSm], [SignalNameMap AST.VHDLId], SignalNameMap AST.VHDLId)
+ -- See expandExpr
+expandBuildTupleExpr binds args =
+ error $ "Tuple construction not supported"
+
+-- Expands the application of argument to a function into VHDL
+expandApplicationExpr ::
+ [(CoreBndr, SignalNameMap AST.VHDLId)]
+ -- A list of bindings in effect
+ -> Type -- The result type of the function call
+ -> Var.Var -- The function to call
+ -> [CoreExpr] -- A list of argumetns to apply to the function
+ -> VHDLState ( [AST.SigDec], [AST.ConcSm], [SignalNameMap AST.VHDLId], SignalNameMap AST.VHDLId)
+ -- See expandExpr
+expandApplicationExpr binds ty f args = do
+ let name = getOccString f
+ -- Generate a unique name for the application
+ appname <- uniqueName ("app-" ++ name)
+ -- Lookup the hwfunction to instantiate
+ HWFunction inports outport <- getHWFunc name
+ -- Expand each of the args, so each of them is reduced to output signals
+ (arg_signal_decls, arg_statements, arg_res_signals) <- expandArgs binds args
+ -- Bind each of the input ports to the expanded arguments
+ let inmaps = concat $ zipWith createAssocElems inports arg_res_signals
+ -- Create signal names for our result
+ let res_signal = getPortNameMapForTy (appname ++ "-out") ty
+ -- Create the corresponding signal declarations
+ let signal_decls = mkSignalsFromMap res_signal
+ -- Bind each of the output ports to our output signals
+ let outmaps = mapOutputPorts outport res_signal
+ -- Instantiate the component
+ let component = AST.CSISm $ AST.CompInsSm
+ (AST.unsafeVHDLBasicId appname)
+ (AST.IUEntity (AST.NSimple (AST.unsafeVHDLBasicId name)))
+ (AST.PMapAspect (inmaps ++ outmaps))
+ -- Merge the generated declarations
+ return (
+ signal_decls ++ arg_signal_decls,
+ component : arg_statements,
+ [], -- We don't take any extra arguments; we don't support higher order functions yet
+ res_signal)
+
+-- Creates a list of AssocElems (port map lines) that maps the given signals
+-- to the given ports.
+createAssocElems ::
+ SignalNameMap AST.VHDLId -- The port names to bind to
+ -> SignalNameMap AST.VHDLId -- The signals to bind to it
+ -> [AST.AssocElem] -- The resulting port map lines
+
+createAssocElems (Signal port_id) (Signal signal_id) =
+ [(Just port_id) AST.:=>: (AST.ADName (AST.NSimple signal_id))]
+
+createAssocElems (Tuple ports) (Tuple signals) =
+ concat $ zipWith createAssocElems ports signals
+