app_concsms <- genApplication (Right resname) zipped_f [Right argexpr1, Right argexpr2]
-- Return the generate functions
return [AST.CSGSm $ AST.GenerateSm label genScheme [] app_concsms]
-{-
+
genFoldl :: BuiltinBuilder
-genFoldl = genVarArgs genFoldl'
-genFoldl' resVal f [folded_f, startVal, inVec] = do
- signatures <- getA vsSignatures
- let entity = Maybe.fromMaybe
- (error $ "Using function '" ++ (varToString folded_f) ++ "' without signature? This should not happen!")
- (Map.lookup folded_f signatures)
- let (vec, _) = splitAppTy (Var.varType inVec)
- let vecty = Type.mkAppTy vec (Var.varType startVal)
- vecType <- vhdl_ty vecty
+genFoldl = genFold True
+
+genFoldr :: BuiltinBuilder
+genFoldr = genFold False
+
+genFold :: Bool -> BuiltinBuilder
+genFold left = genVarArgs (genFold' left)
+genFold' :: Bool -> (Either CoreSyn.CoreBndr AST.VHDLName) -> CoreSyn.CoreBndr -> [Var.Var] -> VHDLSession [AST.ConcSm]
+-- Special case for an empty input vector, just assign start to res
+genFold' left (Left res) _ [_, start, vec] | len == 0 = return [mkUncondAssign (Left res) (varToVHDLExpr start)]
+ where len = (tfvec_len . Var.varType) vec
+genFold' left (Left res) f [folded_f, start, vec] = do
+ -- evec is (TFVec n), so it still needs an element type
+ let (nvec, _) = splitAppTy (Var.varType vec)
+ -- Put the type of the start value in nvec, this will be the type of our
+ -- temporary vector
+ let tmp_ty = Type.mkAppTy nvec (Var.varType start)
+ tmp_vhdl_ty <- vhdl_ty tmp_ty
-- Setup the generate scheme
- let len = (tfvec_len . Var.varType) inVec
- let genlabel = mkVHDLExtId ("foldlVector" ++ (varToString inVec))
- let blockLabel = mkVHDLExtId ("foldlVector" ++ (varToString startVal))
- let range = AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len-1))
- let genScheme = AST.ForGn (AST.unsafeVHDLBasicId "n") range
+ let gen_label = mkVHDLExtId ("foldlVector" ++ (varToString vec))
+ let block_label = mkVHDLExtId ("foldlVector" ++ (varToString start))
+ let gen_range = if left then AST.ToRange (AST.PrimLit "0") len_min_expr
+ else AST.DownRange len_min_expr (AST.PrimLit "0")
+ let gen_scheme = AST.ForGn n_id gen_range
-- Make the intermediate vector
- let tmpVec = AST.BDISD $ AST.SigDec (mkVHDLExtId "tmp") vecType Nothing
- -- Get the entity name and port names
- let entity_id = ent_id entity
- let argports = map (Monad.liftM fst) (ent_args entity)
- let resport = (Monad.liftM fst) (ent_res entity)
- -- Return the generate functions
- let genSm = AST.GenerateSm genlabel genScheme []
- [ AST.CSGSm (genFirstCell (entity_id, argports, resport)
- [startVal, inVec, resVal])
- , AST.CSGSm (genOtherCell (entity_id, argports, resport)
- [startVal, inVec, resVal])
- , AST.CSGSm (genLastCell (entity_id, argports, resport)
- [startVal, inVec, resVal])
- ]
- return $ [AST.CSBSm $ AST.BlockSm blockLabel [] (AST.PMapAspect []) [tmpVec] [AST.CSGSm genSm]]
+ let tmp_dec = AST.BDISD $ AST.SigDec tmp_id tmp_vhdl_ty Nothing
+ -- Create the generate statement
+ cells <- sequence [genFirstCell, genOtherCell]
+ let gen_sm = AST.GenerateSm gen_label gen_scheme [] (map AST.CSGSm cells)
+ -- Assign tmp[len-1] or tmp[0] to res
+ let out_assign = mkUncondAssign (Left res) $ vhdlNameToVHDLExpr (if left then
+ (mkIndexedName tmp_name (AST.PrimLit $ show (len-1))) else
+ (mkIndexedName tmp_name (AST.PrimLit "0")))
+ let block = AST.BlockSm block_label [] (AST.PMapAspect []) [tmp_dec] [AST.CSGSm gen_sm, out_assign]
+ return [AST.CSBSm block]
where
- genFirstCell (entity_id, argports, resport) [startVal, inVec, resVal] = cellGn
- where
- cellLabel = mkVHDLExtId "firstcell"
- cellGenScheme = AST.IfGn ((AST.PrimName $ AST.NSimple nPar) AST.:=: (AST.PrimLit "0"))
- tmpId = mkVHDLExtId "tmp"
- nPar = AST.unsafeVHDLBasicId "n"
- -- Assign the ports
- inport1 = mkAssocElem (argports!!0) (varToString startVal)
- inport2 = mkAssocElemIndexed (argports!!1) (varToVHDLId inVec) nPar
- outport = mkAssocElemIndexed resport tmpId nPar
- portassigns = Maybe.catMaybes [inport1,inport2,outport]
- -- Generate the portmap
- mapLabel = "cell" ++ (AST.fromVHDLId entity_id)
- compins = mkComponentInst mapLabel entity_id portassigns
- -- Return the generate functions
- cellGn = AST.GenerateSm cellLabel cellGenScheme [] [compins]
- genOtherCell (entity_id, argports, resport) [startVal, inVec, resVal] = cellGn
- where
- len = (tfvec_len . Var.varType) inVec
- cellLabel = mkVHDLExtId "othercell"
- cellGenScheme = AST.IfGn $ AST.And ((AST.PrimName $ AST.NSimple nPar) AST.:>: (AST.PrimLit "0"))
- ((AST.PrimName $ AST.NSimple nPar) AST.:<: (AST.PrimLit $ show (len-1)))
- tmpId = mkVHDLExtId "tmp"
- nPar = AST.unsafeVHDLBasicId "n"
- -- Assign the ports
- inport1 = mkAssocElemIndexed (argports!!0) tmpId (AST.unsafeVHDLBasicId "n-1")
- inport2 = mkAssocElemIndexed (argports!!1) (varToVHDLId inVec) nPar
- outport = mkAssocElemIndexed resport tmpId nPar
- portassigns = Maybe.catMaybes [inport1,inport2,outport]
- -- Generate the portmap
- mapLabel = "cell" ++ (AST.fromVHDLId entity_id)
- compins = mkComponentInst mapLabel entity_id portassigns
- -- Return the generate functions
- cellGn = AST.GenerateSm cellLabel cellGenScheme [] [compins]
- genLastCell (entity_id, argports, resport) [startVal, inVec, resVal] = cellGn
- where
- len = (tfvec_len . Var.varType) inVec
- cellLabel = mkVHDLExtId "lastCell"
- cellGenScheme = AST.IfGn ((AST.PrimName $ AST.NSimple nPar) AST.:=: (AST.PrimLit $ show (len-1)))
- tmpId = mkVHDLExtId "tmp"
- nPar = AST.unsafeVHDLBasicId "n"
- -- Assign the ports
- inport1 = mkAssocElemIndexed (argports!!0) tmpId (AST.unsafeVHDLBasicId "n-1")
- inport2 = mkAssocElemIndexed (argports!!1) (varToVHDLId inVec) nPar
- outport = mkAssocElemIndexed resport tmpId nPar
- portassigns = Maybe.catMaybes [inport1,inport2,outport]
- -- Generate the portmap
- mapLabel = "cell" ++ (AST.fromVHDLId entity_id)
- compins = mkComponentInst mapLabel entity_id portassigns
- -- Generate the output assignment
- assign = mkUncondAssign (Left resVal) (AST.PrimName (AST.NIndexed (AST.IndexedName
- (AST.NSimple tmpId) [AST.PrimLit $ show (len-1)])))
- -- Return the generate functions
- cellGn = AST.GenerateSm cellLabel cellGenScheme [] [compins,assign]
--}
+ -- The vector length
+ len = (tfvec_len . Var.varType) vec
+ -- An id for the counter
+ n_id = mkVHDLBasicId "n"
+ n_cur = idToVHDLExpr n_id
+ -- An expression for previous n
+ n_prev = if left then (n_cur AST.:-: (AST.PrimLit "1"))
+ else (n_cur AST.:+: (AST.PrimLit "1"))
+ -- An expression for len-1
+ len_min_expr = (AST.PrimLit $ show (len-1))
+ -- An id for the tmp result vector
+ tmp_id = mkVHDLBasicId "tmp"
+ tmp_name = AST.NSimple tmp_id
+ -- Generate parts of the fold
+ genFirstCell, genOtherCell :: VHDLSession AST.GenerateSm
+ genFirstCell = do
+ let cond_label = mkVHDLExtId "firstcell"
+ -- if n == 0 or n == len-1
+ let cond_scheme = AST.IfGn $ n_cur AST.:=: (if left then (AST.PrimLit "0")
+ else (AST.PrimLit $ show (len-1)))
+ -- Output to tmp[current n]
+ let resname = mkIndexedName tmp_name n_cur
+ -- Input from start
+ let argexpr1 = varToVHDLExpr start
+ -- Input from vec[current n]
+ let argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName vec) n_cur
+ app_concsms <- genApplication (Right resname) folded_f ( if left then
+ [Right argexpr1, Right argexpr2]
+ else
+ [Right argexpr2, Right argexpr1]
+ )
+ -- Return the conditional generate part
+ return $ AST.GenerateSm cond_label cond_scheme [] app_concsms
+
+ genOtherCell = do
+ let cond_label = mkVHDLExtId "othercell"
+ -- if n > 0 or n < len-1
+ let cond_scheme = AST.IfGn $ n_cur AST.:/=: (if left then (AST.PrimLit "0")
+ else (AST.PrimLit $ show (len-1)))
+ -- Output to tmp[current n]
+ let resname = mkIndexedName tmp_name n_cur
+ -- Input from tmp[previous n]
+ let argexpr1 = vhdlNameToVHDLExpr $ mkIndexedName tmp_name n_prev
+ -- Input from vec[current n]
+ let argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName vec) n_cur
+ app_concsms <- genApplication (Right resname) folded_f ( if left then
+ [Right argexpr1, Right argexpr2]
+ else
+ [Right argexpr2, Right argexpr1]
+ )
+ -- Return the conditional generate part
+ return $ AST.GenerateSm cond_label cond_scheme [] app_concsms
+
-----------------------------------------------------------------------------
-- Function to generate VHDL for applications
-----------------------------------------------------------------------------
entity_id = ent_id signature
-- TODO: Using show here isn't really pretty, but we'll need some
-- unique-ish value...
- label = "comp_ins_" ++ (either show show) dst
+ label = "comp_ins_" ++ (either show prettyShow) dst
portmaps = mkAssocElems (map (either exprToVHDLExpr id) args) ((either varToVHDLName id) dst) signature
in
return [mkComponentInst label entity_id portmaps]
, (emptyId, AST.SubProgBody emptySpec [AST.SPCD emptyVar] [emptyExpr])
, (singletonId, AST.SubProgBody singletonSpec [AST.SPVD singletonVar] [singletonRet])
, (copyId, AST.SubProgBody copySpec [AST.SPVD copyVar] [copyExpr])
+ , (selId, AST.SubProgBody selSpec [AST.SPVD selVar] [selFor, selRet])
]
where
ixPar = AST.unsafeVHDLBasicId "ix"
iId = AST.unsafeVHDLBasicId "i"
iPar = iId
aPar = AST.unsafeVHDLBasicId "a"
+ fPar = AST.unsafeVHDLBasicId "f"
+ sPar = AST.unsafeVHDLBasicId "s"
resId = AST.unsafeVHDLBasicId "res"
exSpec = AST.Function (mkVHDLExtId exId) [AST.IfaceVarDec vecPar vectorTM,
AST.IfaceVarDec ixPar naturalTM] elemTM
(AST.PrimName $ AST.NSimple aPar)])
-- return res
copyExpr = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
+ selSpec = AST.Function (mkVHDLExtId selId) [AST.IfaceVarDec fPar naturalTM,
+ AST.IfaceVarDec sPar naturalTM,
+ AST.IfaceVarDec nPar naturalTM,
+ AST.IfaceVarDec vecPar vectorTM ] vectorTM
+ -- variable res : fsvec_x (0 to n-1);
+ selVar =
+ AST.VarDec resId
+ (AST.SubtypeIn vectorTM
+ (Just $ AST.ConstraintIndex $ AST.IndexConstraint
+ [AST.ToRange (AST.PrimLit "0")
+ ((AST.PrimName (AST.NSimple nPar)) AST.:-:
+ (AST.PrimLit "1")) ])
+ )
+ Nothing
+ -- for i res'range loop
+ -- res(i) := vec(f+i*s);
+ -- end loop;
+ selFor = AST.ForSM iId (AST.AttribRange $ AST.AttribName (AST.NSimple resId) rangeId Nothing) [selAssign]
+ -- res(i) := vec(f+i*s);
+ selAssign = let origExp = AST.PrimName (AST.NSimple fPar) AST.:+:
+ (AST.PrimName (AST.NSimple iId) AST.:*:
+ AST.PrimName (AST.NSimple sPar)) in
+ AST.NIndexed (AST.IndexedName (AST.NSimple resId) [AST.PrimName (AST.NSimple iId)]) AST.:=
+ (AST.PrimName $ AST.NIndexed (AST.IndexedName (AST.NSimple vecPar) [origExp]))
+ -- return res;
+ selRet = AST.ReturnSm (Just $ AST.PrimName (AST.NSimple resId))
-----------------------------------------------------------------------------
-- A table of builtin functions
, (initId , (1, genFCall ) )
, (takeId , (2, genFCall ) )
, (dropId , (2, genFCall ) )
+ , (selId , (4, genFCall ) )
, (plusgtId , (2, genFCall ) )
, (mapId , (2, genMap ) )
, (zipWithId , (3, genZipWith ) )
- --, (foldlId , (3, genFoldl ) )
+ , (foldlId , (3, genFoldl ) )
+ , (foldrId , (3, genFoldr ) )
, (emptyId , (0, genFCall ) )
, (singletonId , (1, genFCall ) )
, (copyId , (2, genFCall ) )
projects / matthijs / master-project / cλash.git / blobdiff