4 import qualified Control.Monad as Monad
5 import qualified Data.Map as Map
7 import qualified Data.Either as Either
12 import qualified ForSyDe.Backend.VHDL.AST as AST
18 import qualified IdInfo
27 -----------------------------------------------------------------------------
28 -- Functions to generate VHDL for builtin functions
29 -----------------------------------------------------------------------------
31 -- | A function to wrap a builder-like function that expects its arguments to
34 (dst -> func -> [AST.Expr] -> res)
35 -> (dst -> func -> [Either CoreSyn.CoreExpr AST.Expr] -> res)
36 genExprArgs wrap dst func args = wrap dst func args'
37 where args' = map (either (varToVHDLExpr.exprToVar) id) args
39 -- | A function to wrap a builder-like function that expects its arguments to
42 (dst -> func -> [Var.Var] -> res)
43 -> (dst -> func -> [Either CoreSyn.CoreExpr AST.Expr] -> res)
44 genVarArgs wrap dst func args = wrap dst func args'
46 args' = map exprToVar exprargs
47 -- Check (rather crudely) that all arguments are CoreExprs
48 (exprargs, []) = Either.partitionEithers args
50 -- | A function to wrap a builder-like function that produces an expression
51 -- and expects it to be assigned to the destination.
53 ((Either CoreSyn.CoreBndr AST.VHDLName) -> func -> [arg] -> VHDLSession AST.Expr)
54 -> ((Either CoreSyn.CoreBndr AST.VHDLName) -> func -> [arg] -> VHDLSession [AST.ConcSm])
55 genExprRes wrap dst func args = do
56 expr <- wrap dst func args
57 return $ [mkUncondAssign dst expr]
59 -- | Generate a binary operator application. The first argument should be a
60 -- constructor from the AST.Expr type, e.g. AST.And.
61 genOperator2 :: (AST.Expr -> AST.Expr -> AST.Expr) -> BuiltinBuilder
62 genOperator2 op = genExprArgs $ genExprRes (genOperator2' op)
63 genOperator2' :: (AST.Expr -> AST.Expr -> AST.Expr) -> dst -> CoreSyn.CoreBndr -> [AST.Expr] -> VHDLSession AST.Expr
64 genOperator2' op _ f [arg1, arg2] = return $ op arg1 arg2
66 -- | Generate a unary operator application
67 genOperator1 :: (AST.Expr -> AST.Expr) -> BuiltinBuilder
68 genOperator1 op = genExprArgs $ genExprRes (genOperator1' op)
69 genOperator1' :: (AST.Expr -> AST.Expr) -> dst -> CoreSyn.CoreBndr -> [AST.Expr] -> VHDLSession AST.Expr
70 genOperator1' op _ f [arg] = return $ op arg
72 -- | Generate a function call from the destination binder, function name and a
73 -- list of expressions (its arguments)
74 genFCall :: BuiltinBuilder
75 genFCall = genExprArgs $ genExprRes genFCall'
76 genFCall' :: Either CoreSyn.CoreBndr AST.VHDLName -> CoreSyn.CoreBndr -> [AST.Expr] -> VHDLSession AST.Expr
77 genFCall' (Left res) f args = do
78 let fname = varToString f
79 let el_ty = (tfvec_elem . Var.varType) res
80 id <- vectorFunId el_ty fname
81 return $ AST.PrimFCall $ AST.FCall (AST.NSimple id) $
82 map (\exp -> Nothing AST.:=>: AST.ADExpr exp) args
83 genFCall' (Right name) _ _ = error $ "Cannot generate builtin function call assigned to a VHDLName: " ++ show name
85 -- | Generate a generate statement for the builtin function "map"
86 genMap :: BuiltinBuilder
87 genMap = genVarArgs genMap'
88 genMap' :: (Either CoreSyn.CoreBndr AST.VHDLName) -> CoreSyn.CoreBndr -> [Var.Var] -> VHDLSession [AST.ConcSm]
89 genMap' (Left res) f [mapped_f, arg] =
91 -- Setup the generate scheme
92 len = (tfvec_len . Var.varType) res
93 -- TODO: Use something better than varToString
94 label = mkVHDLExtId ("mapVector" ++ (varToString res))
95 n_id = mkVHDLBasicId "n"
96 n_expr = idToVHDLExpr n_id
97 range = AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len-1))
98 genScheme = AST.ForGn n_id range
100 -- Create the content of the generate statement: Applying the mapped_f to
101 -- each of the elements in arg, storing to each element in res
102 resname = mkIndexedName (varToVHDLName res) n_expr
103 argexpr = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName arg) n_expr
105 app_concsms <- genApplication (Right resname) mapped_f [Right argexpr]
106 -- Return the generate statement
107 return [AST.CSGSm $ AST.GenerateSm label genScheme [] app_concsms]
109 genMap' (Right name) _ _ = error $ "Cannot generate map function call assigned to a VHDLName: " ++ show name
111 genZipWith :: BuiltinBuilder
112 genZipWith = genVarArgs genZipWith'
113 genZipWith' :: (Either CoreSyn.CoreBndr AST.VHDLName) -> CoreSyn.CoreBndr -> [Var.Var] -> VHDLSession [AST.ConcSm]
114 genZipWith' (Left res) f args@[zipped_f, arg1, arg2] =
116 -- Setup the generate scheme
117 len = (tfvec_len . Var.varType) res
118 -- TODO: Use something better than varToString
119 label = mkVHDLExtId ("zipWithVector" ++ (varToString res))
120 n_id = mkVHDLBasicId "n"
121 n_expr = idToVHDLExpr n_id
122 range = AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len-1))
123 genScheme = AST.ForGn n_id range
125 -- Create the content of the generate statement: Applying the zipped_f to
126 -- each of the elements in arg1 and arg2, storing to each element in res
127 resname = mkIndexedName (varToVHDLName res) n_expr
128 argexpr1 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName arg1) n_expr
129 argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName arg2) n_expr
131 app_concsms <- genApplication (Right resname) zipped_f [Right argexpr1, Right argexpr2]
132 -- Return the generate functions
133 return [AST.CSGSm $ AST.GenerateSm label genScheme [] app_concsms]
135 genFoldl :: BuiltinBuilder
136 genFoldl = genFold True
138 genFoldr :: BuiltinBuilder
139 genFoldr = genFold False
141 genFold :: Bool -> BuiltinBuilder
142 genFold left = genVarArgs (genFold' left)
143 genFold' :: Bool -> (Either CoreSyn.CoreBndr AST.VHDLName) -> CoreSyn.CoreBndr -> [Var.Var] -> VHDLSession [AST.ConcSm]
144 -- Special case for an empty input vector, just assign start to res
145 genFold' left (Left res) _ [_, start, vec] | len == 0 = return [mkUncondAssign (Left res) (varToVHDLExpr start)]
146 where len = (tfvec_len . Var.varType) vec
147 genFold' left (Left res) f [folded_f, start, vec] = do
148 -- evec is (TFVec n), so it still needs an element type
149 let (nvec, _) = splitAppTy (Var.varType vec)
150 -- Put the type of the start value in nvec, this will be the type of our
152 let tmp_ty = Type.mkAppTy nvec (Var.varType start)
153 tmp_vhdl_ty <- vhdl_ty tmp_ty
154 -- Setup the generate scheme
155 let gen_label = mkVHDLExtId ("foldlVector" ++ (varToString vec))
156 let block_label = mkVHDLExtId ("foldlVector" ++ (varToString start))
157 let gen_range = if left then AST.ToRange (AST.PrimLit "0") len_min_expr
158 else AST.DownRange len_min_expr (AST.PrimLit "0")
159 let gen_scheme = AST.ForGn n_id gen_range
160 -- Make the intermediate vector
161 let tmp_dec = AST.BDISD $ AST.SigDec tmp_id tmp_vhdl_ty Nothing
162 -- Create the generate statement
163 cells <- sequence [genFirstCell, genOtherCell]
164 let gen_sm = AST.GenerateSm gen_label gen_scheme [] (map AST.CSGSm cells)
165 -- Assign tmp[len-1] or tmp[0] to res
166 let out_assign = mkUncondAssign (Left res) $ vhdlNameToVHDLExpr (if left then
167 (mkIndexedName tmp_name (AST.PrimLit $ show (len-1))) else
168 (mkIndexedName tmp_name (AST.PrimLit "0")))
169 let block = AST.BlockSm block_label [] (AST.PMapAspect []) [tmp_dec] [AST.CSGSm gen_sm, out_assign]
170 return [AST.CSBSm block]
173 len = (tfvec_len . Var.varType) vec
174 -- An id for the counter
175 n_id = mkVHDLBasicId "n"
176 n_cur = idToVHDLExpr n_id
177 -- An expression for previous n
178 n_prev = if left then (n_cur AST.:-: (AST.PrimLit "1"))
179 else (n_cur AST.:+: (AST.PrimLit "1"))
180 -- An expression for len-1
181 len_min_expr = (AST.PrimLit $ show (len-1))
182 -- An id for the tmp result vector
183 tmp_id = mkVHDLBasicId "tmp"
184 tmp_name = AST.NSimple tmp_id
185 -- Generate parts of the fold
186 genFirstCell, genOtherCell :: VHDLSession AST.GenerateSm
188 let cond_label = mkVHDLExtId "firstcell"
189 -- if n == 0 or n == len-1
190 let cond_scheme = AST.IfGn $ n_cur AST.:=: (if left then (AST.PrimLit "0")
191 else (AST.PrimLit $ show (len-1)))
192 -- Output to tmp[current n]
193 let resname = mkIndexedName tmp_name n_cur
195 let argexpr1 = varToVHDLExpr start
196 -- Input from vec[current n]
197 let argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName vec) n_cur
198 app_concsms <- genApplication (Right resname) folded_f ( if left then
199 [Right argexpr1, Right argexpr2]
201 [Right argexpr2, Right argexpr1]
203 -- Return the conditional generate part
204 return $ AST.GenerateSm cond_label cond_scheme [] app_concsms
207 let cond_label = mkVHDLExtId "othercell"
208 -- if n > 0 or n < len-1
209 let cond_scheme = AST.IfGn $ n_cur AST.:/=: (if left then (AST.PrimLit "0")
210 else (AST.PrimLit $ show (len-1)))
211 -- Output to tmp[current n]
212 let resname = mkIndexedName tmp_name n_cur
213 -- Input from tmp[previous n]
214 let argexpr1 = vhdlNameToVHDLExpr $ mkIndexedName tmp_name n_prev
215 -- Input from vec[current n]
216 let argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName vec) n_cur
217 app_concsms <- genApplication (Right resname) folded_f ( if left then
218 [Right argexpr1, Right argexpr2]
220 [Right argexpr2, Right argexpr1]
222 -- Return the conditional generate part
223 return $ AST.GenerateSm cond_label cond_scheme [] app_concsms
225 -- | Generate a generate statement for the builtin function "zip"
226 genZip :: BuiltinBuilder
227 genZip = genVarArgs genZip'
228 genZip' :: (Either CoreSyn.CoreBndr AST.VHDLName) -> CoreSyn.CoreBndr -> [Var.Var] -> VHDLSession [AST.ConcSm]
229 genZip' (Left res) f args@[arg1, arg2] =
231 -- Setup the generate scheme
232 len = (tfvec_len . Var.varType) res
233 -- TODO: Use something better than varToString
234 label = mkVHDLExtId ("zipVector" ++ (varToString res))
235 n_id = mkVHDLBasicId "n"
236 n_expr = idToVHDLExpr n_id
237 range = AST.ToRange (AST.PrimLit "0") (AST.PrimLit $ show (len-1))
238 genScheme = AST.ForGn n_id range
239 resname' = mkIndexedName (varToVHDLName res) n_expr
240 argexpr1 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName arg1) n_expr
241 argexpr2 = vhdlNameToVHDLExpr $ mkIndexedName (varToVHDLName arg2) n_expr
243 labels <- getFieldLabels (tfvec_elem (Var.varType res))
244 let resnameA = mkSelectedName resname' (labels!!0)
245 let resnameB = mkSelectedName resname' (labels!!1)
246 let resA_assign = mkUncondAssign (Right resnameA) argexpr1
247 let resB_assign = mkUncondAssign (Right resnameB) argexpr2
248 -- Return the generate functions
249 return [AST.CSGSm $ AST.GenerateSm label genScheme [] [resA_assign,resB_assign]]
251 -----------------------------------------------------------------------------
252 -- Function to generate VHDL for applications
253 -----------------------------------------------------------------------------
255 (Either CoreSyn.CoreBndr AST.VHDLName) -- ^ Where to store the result?
256 -> CoreSyn.CoreBndr -- ^ The function to apply
257 -> [Either CoreSyn.CoreExpr AST.Expr] -- ^ The arguments to apply
258 -> VHDLSession [AST.ConcSm] -- ^ The resulting concurrent statements
259 genApplication dst f args =
260 case Var.globalIdVarDetails f of
261 IdInfo.DataConWorkId dc -> case dst of
262 -- It's a datacon. Create a record from its arguments.
264 -- We have the bndr, so we can get at the type
265 labels <- getFieldLabels (Var.varType bndr)
266 return $ zipWith mkassign labels $ map (either exprToVHDLExpr id) args
268 mkassign :: AST.VHDLId -> AST.Expr -> AST.ConcSm
270 let sel_name = mkSelectedName ((either varToVHDLName id) dst) label in
271 mkUncondAssign (Right sel_name) arg
272 Right _ -> error $ "Generate.genApplication Can't generate dataconstructor application without an original binder"
273 IdInfo.VanillaGlobal -> do
274 -- It's a global value imported from elsewhere. These can be builtin
275 -- functions. Look up the function name in the name table and execute
276 -- the associated builder if there is any and the argument count matches
277 -- (this should always be the case if it typechecks, but just to be
279 case (Map.lookup (varToString f) globalNameTable) of
280 Just (arg_count, builder) ->
281 if length args == arg_count then
284 error $ "Generate.genApplication Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ show args
285 Nothing -> error $ "Using function from another module that is not a known builtin: " ++ pprString f
286 IdInfo.NotGlobalId -> do
287 signatures <- getA vsSignatures
288 -- This is a local id, so it should be a function whose definition we
289 -- have and which can be turned into a component instantiation.
291 signature = Maybe.fromMaybe
292 (error $ "Using function '" ++ (varToString f) ++ "' without signature? This should not happen!")
293 (Map.lookup f signatures)
294 entity_id = ent_id signature
295 -- TODO: Using show here isn't really pretty, but we'll need some
296 -- unique-ish value...
297 label = "comp_ins_" ++ (either show prettyShow) dst
298 portmaps = mkAssocElems (map (either exprToVHDLExpr id) args) ((either varToVHDLName id) dst) signature
300 return [mkComponentInst label entity_id portmaps]
301 details -> error $ "Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
303 -----------------------------------------------------------------------------
304 -- Functions to generate functions dealing with vectors.
305 -----------------------------------------------------------------------------
307 -- Returns the VHDLId of the vector function with the given name for the given
308 -- element type. Generates -- this function if needed.
309 vectorFunId :: Type.Type -> String -> VHDLSession AST.VHDLId
310 vectorFunId el_ty fname = do
311 elemTM <- vhdl_ty el_ty
312 -- TODO: This should not be duplicated from mk_vector_ty. Probably but it in
313 -- the VHDLState or something.
314 let vectorTM = mkVHDLExtId $ "vector_" ++ (AST.fromVHDLId elemTM)
315 typefuns <- getA vsTypeFuns
316 case Map.lookup (OrdType el_ty, fname) typefuns of
317 -- Function already generated, just return it
318 Just (id, _) -> return id
319 -- Function not generated yet, generate it
321 let functions = genUnconsVectorFuns elemTM vectorTM
322 case lookup fname functions of
324 modA vsTypeFuns $ Map.insert (OrdType el_ty, fname) (function_id, body)
326 Nothing -> error $ "I don't know how to generate vector function " ++ fname
328 function_id = mkVHDLExtId fname
330 genUnconsVectorFuns :: AST.TypeMark -- ^ type of the vector elements
331 -> AST.TypeMark -- ^ type of the vector
332 -> [(String, AST.SubProgBody)]
333 genUnconsVectorFuns elemTM vectorTM =
334 [ (exId, AST.SubProgBody exSpec [] [exExpr])
335 , (replaceId, AST.SubProgBody replaceSpec [AST.SPVD replaceVar] [replaceExpr,replaceRet])
336 , (headId, AST.SubProgBody headSpec [] [headExpr])
337 , (lastId, AST.SubProgBody lastSpec [] [lastExpr])
338 , (initId, AST.SubProgBody initSpec [AST.SPVD initVar] [initExpr, initRet])
339 , (tailId, AST.SubProgBody tailSpec [AST.SPVD tailVar] [tailExpr, tailRet])
340 , (takeId, AST.SubProgBody takeSpec [AST.SPVD takeVar] [takeExpr, takeRet])
341 , (dropId, AST.SubProgBody dropSpec [AST.SPVD dropVar] [dropExpr, dropRet])
342 , (plusgtId, AST.SubProgBody plusgtSpec [AST.SPVD plusgtVar] [plusgtExpr, plusgtRet])
343 , (emptyId, AST.SubProgBody emptySpec [AST.SPCD emptyVar] [emptyExpr])
344 , (singletonId, AST.SubProgBody singletonSpec [AST.SPVD singletonVar] [singletonRet])
345 , (copyId, AST.SubProgBody copySpec [AST.SPVD copyVar] [copyExpr])
346 , (selId, AST.SubProgBody selSpec [AST.SPVD selVar] [selFor, selRet])
347 , (ltplusId, AST.SubProgBody ltplusSpec [AST.SPVD ltplusVar] [ltplusExpr, ltplusRet] )
348 , (plusplusId, AST.SubProgBody plusplusSpec [AST.SPVD plusplusVar] [plusplusExpr, plusplusRet])
351 ixPar = AST.unsafeVHDLBasicId "ix"
352 vecPar = AST.unsafeVHDLBasicId "vec"
353 vec1Par = AST.unsafeVHDLBasicId "vec1"
354 vec2Par = AST.unsafeVHDLBasicId "vec2"
355 nPar = AST.unsafeVHDLBasicId "n"
356 iId = AST.unsafeVHDLBasicId "i"
358 aPar = AST.unsafeVHDLBasicId "a"
359 fPar = AST.unsafeVHDLBasicId "f"
360 sPar = AST.unsafeVHDLBasicId "s"
361 resId = AST.unsafeVHDLBasicId "res"
362 exSpec = AST.Function (mkVHDLExtId exId) [AST.IfaceVarDec vecPar vectorTM,
363 AST.IfaceVarDec ixPar naturalTM] elemTM
364 exExpr = AST.ReturnSm (Just $ AST.PrimName $ AST.NIndexed
365 (AST.IndexedName (AST.NSimple vecPar) [AST.PrimName $
367 replaceSpec = AST.Function (mkVHDLExtId replaceId) [ AST.IfaceVarDec vecPar vectorTM
368 , AST.IfaceVarDec iPar naturalTM
369 , AST.IfaceVarDec aPar elemTM
371 -- variable res : fsvec_x (0 to vec'length-1);
374 (AST.SubtypeIn vectorTM
375 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
376 [AST.ToRange (AST.PrimLit "0")
377 (AST.PrimName (AST.NAttribute $
378 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing) AST.:-:
379 (AST.PrimLit "1")) ]))
381 -- res AST.:= vec(0 to i-1) & a & vec(i+1 to length'vec-1)
382 replaceExpr = AST.NSimple resId AST.:=
383 (vecSlice (AST.PrimLit "0") (AST.PrimName (AST.NSimple iPar) AST.:-: AST.PrimLit "1") AST.:&:
384 AST.PrimName (AST.NSimple aPar) AST.:&:
385 vecSlice (AST.PrimName (AST.NSimple iPar) AST.:+: AST.PrimLit "1")
386 ((AST.PrimName (AST.NAttribute $
387 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing))
388 AST.:-: AST.PrimLit "1"))
389 replaceRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
390 vecSlice init last = AST.PrimName (AST.NSlice
393 (AST.ToRange init last)))
394 headSpec = AST.Function (mkVHDLExtId headId) [AST.IfaceVarDec vecPar vectorTM] elemTM
396 headExpr = AST.ReturnSm (Just $ (AST.PrimName $ AST.NIndexed (AST.IndexedName
397 (AST.NSimple vecPar) [AST.PrimLit "0"])))
398 lastSpec = AST.Function (mkVHDLExtId lastId) [AST.IfaceVarDec vecPar vectorTM] elemTM
399 -- return vec(vec'length-1);
400 lastExpr = AST.ReturnSm (Just $ (AST.PrimName $ AST.NIndexed (AST.IndexedName
402 [AST.PrimName (AST.NAttribute $
403 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing)
404 AST.:-: AST.PrimLit "1"])))
405 initSpec = AST.Function (mkVHDLExtId initId) [AST.IfaceVarDec vecPar vectorTM] vectorTM
406 -- variable res : fsvec_x (0 to vec'length-2);
409 (AST.SubtypeIn vectorTM
410 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
411 [AST.ToRange (AST.PrimLit "0")
412 (AST.PrimName (AST.NAttribute $
413 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing) AST.:-:
414 (AST.PrimLit "2")) ]))
416 -- resAST.:= vec(0 to vec'length-2)
417 initExpr = AST.NSimple resId AST.:= (vecSlice
419 (AST.PrimName (AST.NAttribute $
420 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing)
421 AST.:-: AST.PrimLit "2"))
422 initRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
423 tailSpec = AST.Function (mkVHDLExtId tailId) [AST.IfaceVarDec vecPar vectorTM] vectorTM
424 -- variable res : fsvec_x (0 to vec'length-2);
427 (AST.SubtypeIn vectorTM
428 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
429 [AST.ToRange (AST.PrimLit "0")
430 (AST.PrimName (AST.NAttribute $
431 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing) AST.:-:
432 (AST.PrimLit "2")) ]))
434 -- res AST.:= vec(1 to vec'length-1)
435 tailExpr = AST.NSimple resId AST.:= (vecSlice
437 (AST.PrimName (AST.NAttribute $
438 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing)
439 AST.:-: AST.PrimLit "1"))
440 tailRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
441 takeSpec = AST.Function (mkVHDLExtId takeId) [AST.IfaceVarDec nPar naturalTM,
442 AST.IfaceVarDec vecPar vectorTM ] vectorTM
443 -- variable res : fsvec_x (0 to n-1);
446 (AST.SubtypeIn vectorTM
447 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
448 [AST.ToRange (AST.PrimLit "0")
449 ((AST.PrimName (AST.NSimple nPar)) AST.:-:
450 (AST.PrimLit "1")) ]))
452 -- res AST.:= vec(0 to n-1)
453 takeExpr = AST.NSimple resId AST.:=
454 (vecSlice (AST.PrimLit "1")
455 (AST.PrimName (AST.NSimple $ nPar) AST.:-: AST.PrimLit "1"))
456 takeRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
457 dropSpec = AST.Function (mkVHDLExtId dropId) [AST.IfaceVarDec nPar naturalTM,
458 AST.IfaceVarDec vecPar vectorTM ] vectorTM
459 -- variable res : fsvec_x (0 to vec'length-n-1);
462 (AST.SubtypeIn vectorTM
463 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
464 [AST.ToRange (AST.PrimLit "0")
465 (AST.PrimName (AST.NAttribute $
466 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing) AST.:-:
467 (AST.PrimName $ AST.NSimple nPar)AST.:-: (AST.PrimLit "1")) ]))
469 -- res AST.:= vec(n to vec'length-1)
470 dropExpr = AST.NSimple resId AST.:= (vecSlice
471 (AST.PrimName $ AST.NSimple nPar)
472 (AST.PrimName (AST.NAttribute $
473 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing)
474 AST.:-: AST.PrimLit "1"))
475 dropRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
476 plusgtSpec = AST.Function (mkVHDLExtId plusgtId) [AST.IfaceVarDec aPar elemTM,
477 AST.IfaceVarDec vecPar vectorTM] vectorTM
478 -- variable res : fsvec_x (0 to vec'length);
481 (AST.SubtypeIn vectorTM
482 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
483 [AST.ToRange (AST.PrimLit "0")
484 (AST.PrimName (AST.NAttribute $
485 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing))]))
487 plusgtExpr = AST.NSimple resId AST.:=
488 ((AST.PrimName $ AST.NSimple aPar) AST.:&:
489 (AST.PrimName $ AST.NSimple vecPar))
490 plusgtRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
491 emptySpec = AST.Function (mkVHDLExtId emptyId) [] vectorTM
494 (AST.SubtypeIn vectorTM Nothing)
495 (Just $ AST.PrimLit "\"\"")
496 emptyExpr = AST.ReturnSm (Just $ AST.PrimName (AST.NSimple resId))
497 singletonSpec = AST.Function (mkVHDLExtId singletonId) [AST.IfaceVarDec aPar elemTM ]
499 -- variable res : fsvec_x (0 to 0) := (others => a);
502 (AST.SubtypeIn vectorTM
503 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
504 [AST.ToRange (AST.PrimLit "0") (AST.PrimLit "0")]))
505 (Just $ AST.Aggregate [AST.ElemAssoc (Just AST.Others)
506 (AST.PrimName $ AST.NSimple aPar)])
507 singletonRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
508 copySpec = AST.Function (mkVHDLExtId copyId) [AST.IfaceVarDec nPar naturalTM,
509 AST.IfaceVarDec aPar elemTM ] vectorTM
510 -- variable res : fsvec_x (0 to n-1) := (others => a);
513 (AST.SubtypeIn vectorTM
514 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
515 [AST.ToRange (AST.PrimLit "0")
516 ((AST.PrimName (AST.NSimple nPar)) AST.:-:
517 (AST.PrimLit "1")) ]))
518 (Just $ AST.Aggregate [AST.ElemAssoc (Just AST.Others)
519 (AST.PrimName $ AST.NSimple aPar)])
521 copyExpr = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
522 selSpec = AST.Function (mkVHDLExtId selId) [AST.IfaceVarDec fPar naturalTM,
523 AST.IfaceVarDec sPar naturalTM,
524 AST.IfaceVarDec nPar naturalTM,
525 AST.IfaceVarDec vecPar vectorTM ] vectorTM
526 -- variable res : fsvec_x (0 to n-1);
529 (AST.SubtypeIn vectorTM
530 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
531 [AST.ToRange (AST.PrimLit "0")
532 ((AST.PrimName (AST.NSimple nPar)) AST.:-:
533 (AST.PrimLit "1")) ])
536 -- for i res'range loop
537 -- res(i) := vec(f+i*s);
539 selFor = AST.ForSM iId (AST.AttribRange $ AST.AttribName (AST.NSimple resId) rangeId Nothing) [selAssign]
540 -- res(i) := vec(f+i*s);
541 selAssign = let origExp = AST.PrimName (AST.NSimple fPar) AST.:+:
542 (AST.PrimName (AST.NSimple iId) AST.:*:
543 AST.PrimName (AST.NSimple sPar)) in
544 AST.NIndexed (AST.IndexedName (AST.NSimple resId) [AST.PrimName (AST.NSimple iId)]) AST.:=
545 (AST.PrimName $ AST.NIndexed (AST.IndexedName (AST.NSimple vecPar) [origExp]))
547 selRet = AST.ReturnSm (Just $ AST.PrimName (AST.NSimple resId))
548 ltplusSpec = AST.Function (mkVHDLExtId ltplusId) [AST.IfaceVarDec vecPar vectorTM,
549 AST.IfaceVarDec aPar elemTM] vectorTM
550 -- variable res : fsvec_x (0 to vec'length);
553 (AST.SubtypeIn vectorTM
554 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
555 [AST.ToRange (AST.PrimLit "0")
556 (AST.PrimName (AST.NAttribute $
557 AST.AttribName (AST.NSimple vecPar) (mkVHDLBasicId lengthId) Nothing))]))
559 ltplusExpr = AST.NSimple resId AST.:=
560 ((AST.PrimName $ AST.NSimple vecPar) AST.:&:
561 (AST.PrimName $ AST.NSimple aPar))
562 ltplusRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
563 plusplusSpec = AST.Function (mkVHDLExtId plusplusId) [AST.IfaceVarDec vec1Par vectorTM,
564 AST.IfaceVarDec vec2Par vectorTM]
566 -- variable res : fsvec_x (0 to vec1'length + vec2'length -1);
569 (AST.SubtypeIn vectorTM
570 (Just $ AST.ConstraintIndex $ AST.IndexConstraint
571 [AST.ToRange (AST.PrimLit "0")
572 (AST.PrimName (AST.NAttribute $
573 AST.AttribName (AST.NSimple vec1Par) (mkVHDLBasicId lengthId) Nothing) AST.:+:
574 AST.PrimName (AST.NAttribute $
575 AST.AttribName (AST.NSimple vec2Par) (mkVHDLBasicId lengthId) Nothing) AST.:-:
578 plusplusExpr = AST.NSimple resId AST.:=
579 ((AST.PrimName $ AST.NSimple vec1Par) AST.:&:
580 (AST.PrimName $ AST.NSimple vec2Par))
581 plusplusRet = AST.ReturnSm (Just $ AST.PrimName $ AST.NSimple resId)
583 -----------------------------------------------------------------------------
584 -- A table of builtin functions
585 -----------------------------------------------------------------------------
587 -- | The builtin functions we support. Maps a name to an argument count and a
589 globalNameTable :: NameTable
590 globalNameTable = Map.fromList
591 [ (exId , (2, genFCall ) )
592 , (replaceId , (3, genFCall ) )
593 , (headId , (1, genFCall ) )
594 , (lastId , (1, genFCall ) )
595 , (tailId , (1, genFCall ) )
596 , (initId , (1, genFCall ) )
597 , (takeId , (2, genFCall ) )
598 , (dropId , (2, genFCall ) )
599 , (selId , (4, genFCall ) )
600 , (plusgtId , (2, genFCall ) )
601 , (ltplusId , (2, genFCall ) )
602 , (plusplusId , (2, genFCall ) )
603 , (mapId , (2, genMap ) )
604 , (zipWithId , (3, genZipWith ) )
605 , (foldlId , (3, genFoldl ) )
606 , (foldrId , (3, genFoldr ) )
607 , (zipId , (2, genZip ) )
608 , (emptyId , (0, genFCall ) )
609 , (singletonId , (1, genFCall ) )
610 , (copyId , (2, genFCall ) )
611 , (hwxorId , (2, genOperator2 AST.Xor ) )
612 , (hwandId , (2, genOperator2 AST.And ) )
613 , (hworId , (2, genOperator2 AST.Or ) )
614 , (hwnotId , (1, genOperator1 AST.Not ) )