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Add more missing `{-# LANGUAGE #-}`s to `genprimopcode` output
[ghc.git] / utils / genprimopcode / Main.hs
1 {-# OPTIONS -cpp #-}
2 ------------------------------------------------------------------
3 -- A primop-table mangling program --
4 ------------------------------------------------------------------
5
6 module Main where
7
8 import Parser
9 import Syntax
10
11 import Data.Char
12 import Data.List
13 import Data.Maybe ( catMaybes )
14 import System.Environment ( getArgs )
15
16 vecOptions :: Entry -> [(String,String,Int)]
17 vecOptions i =
18 concat [vecs | OptionVector vecs <- opts i]
19
20 desugarVectorSpec :: Entry -> [Entry]
21 desugarVectorSpec i@(Section {}) = [i]
22 desugarVectorSpec i = case vecOptions i of
23 [] -> [i]
24 vos -> map genVecEntry vos
25 where
26 genVecEntry :: (String,String,Int) -> Entry
27 genVecEntry (con,repCon,n) =
28 case i of
29 PrimOpSpec {} ->
30 PrimVecOpSpec { cons = "(" ++ concat (intersperse " " [cons i, vecCat, show n, vecWidth]) ++ ")"
31 , name = name'
32 , prefix = pfx
33 , veclen = n
34 , elemrep = con ++ "ElemRep"
35 , ty = desugarTy (ty i)
36 , cat = cat i
37 , desc = desc i
38 , opts = opts i
39 }
40 PrimTypeSpec {} ->
41 PrimVecTypeSpec { ty = desugarTy (ty i)
42 , prefix = pfx
43 , veclen = n
44 , elemrep = con ++ "ElemRep"
45 , desc = desc i
46 , opts = opts i
47 }
48 _ ->
49 error "vector options can only be given for primops and primtypes"
50 where
51 vecCons = con++"X"++show n++"#"
52 vecCat = conCat con
53 vecWidth = conWidth con
54 pfx = lowerHead con++"X"++show n
55 vecTyName = pfx++"PrimTy"
56
57 name' | Just pre <- splitSuffix (name i) "Array#" = pre++vec++"Array#"
58 | Just pre <- splitSuffix (name i) "OffAddr#" = pre++vec++"OffAddr#"
59 | Just pre <- splitSuffix (name i) "ArrayAs#" = pre++con++"ArrayAs"++vec++"#"
60 | Just pre <- splitSuffix (name i) "OffAddrAs#" = pre++con++"OffAddrAs"++vec++"#"
61 | otherwise = init (name i)++vec ++"#"
62 where
63 vec = con++"X"++show n
64
65 splitSuffix :: Eq a => [a] -> [a] -> Maybe [a]
66 splitSuffix s suf
67 | drop len s == suf = Just (take len s)
68 | otherwise = Nothing
69 where
70 len = length s - length suf
71
72 lowerHead s = toLower (head s) : tail s
73
74 desugarTy :: Ty -> Ty
75 desugarTy (TyF s d) = TyF (desugarTy s) (desugarTy d)
76 desugarTy (TyC s d) = TyC (desugarTy s) (desugarTy d)
77 desugarTy (TyApp SCALAR []) = TyApp (TyCon repCon) []
78 desugarTy (TyApp VECTOR []) = TyApp (VecTyCon vecCons vecTyName) []
79 desugarTy (TyApp VECTUPLE []) = TyUTup (replicate n (TyApp (TyCon repCon) []))
80 desugarTy (TyApp tycon ts) = TyApp tycon (map desugarTy ts)
81 desugarTy t@(TyVar {}) = t
82 desugarTy (TyUTup ts) = TyUTup (map desugarTy ts)
83
84 conCat :: String -> String
85 conCat "Int8" = "IntVec"
86 conCat "Int16" = "IntVec"
87 conCat "Int32" = "IntVec"
88 conCat "Int64" = "IntVec"
89 conCat "Word8" = "WordVec"
90 conCat "Word16" = "WordVec"
91 conCat "Word32" = "WordVec"
92 conCat "Word64" = "WordVec"
93 conCat "Float" = "FloatVec"
94 conCat "Double" = "FloatVec"
95 conCat con = error $ "conCat: unknown type constructor " ++ con ++ "\n"
96
97 conWidth :: String -> String
98 conWidth "Int8" = "W8"
99 conWidth "Int16" = "W16"
100 conWidth "Int32" = "W32"
101 conWidth "Int64" = "W64"
102 conWidth "Word8" = "W8"
103 conWidth "Word16" = "W16"
104 conWidth "Word32" = "W32"
105 conWidth "Word64" = "W64"
106 conWidth "Float" = "W32"
107 conWidth "Double" = "W64"
108 conWidth con = error $ "conWidth: unknown type constructor " ++ con ++ "\n"
109
110 main :: IO ()
111 main = getArgs >>= \args ->
112 if length args /= 1 || head args `notElem` known_args
113 then error ("usage: genprimopcode command < primops.txt > ...\n"
114 ++ " where command is one of\n"
115 ++ unlines (map (" "++) known_args)
116 )
117 else
118 do s <- getContents
119 case parse s of
120 Left err -> error ("parse error at " ++ (show err))
121 Right p_o_specs@(Info _ entries)
122 -> seq (sanityTop p_o_specs) (
123 case head args of
124
125 "--data-decl"
126 -> putStr (gen_data_decl p_o_specs)
127
128 "--has-side-effects"
129 -> putStr (gen_switch_from_attribs
130 "has_side_effects"
131 "primOpHasSideEffects" p_o_specs)
132
133 "--out-of-line"
134 -> putStr (gen_switch_from_attribs
135 "out_of_line"
136 "primOpOutOfLine" p_o_specs)
137
138 "--commutable"
139 -> putStr (gen_switch_from_attribs
140 "commutable"
141 "commutableOp" p_o_specs)
142
143 "--code-size"
144 -> putStr (gen_switch_from_attribs
145 "code_size"
146 "primOpCodeSize" p_o_specs)
147
148 "--can-fail"
149 -> putStr (gen_switch_from_attribs
150 "can_fail"
151 "primOpCanFail" p_o_specs)
152
153 "--strictness"
154 -> putStr (gen_switch_from_attribs
155 "strictness"
156 "primOpStrictness" p_o_specs)
157
158 "--fixity"
159 -> putStr (gen_switch_from_attribs
160 "fixity"
161 "primOpFixity" p_o_specs)
162
163 "--primop-primop-info"
164 -> putStr (gen_primop_info p_o_specs)
165
166 "--primop-tag"
167 -> putStr (gen_primop_tag p_o_specs)
168
169 "--primop-list"
170 -> putStr (gen_primop_list p_o_specs)
171
172 "--primop-vector-uniques"
173 -> putStr (gen_primop_vector_uniques p_o_specs)
174
175 "--primop-vector-tys"
176 -> putStr (gen_primop_vector_tys p_o_specs)
177
178 "--primop-vector-tys-exports"
179 -> putStr (gen_primop_vector_tys_exports p_o_specs)
180
181 "--primop-vector-tycons"
182 -> putStr (gen_primop_vector_tycons p_o_specs)
183
184 "--make-haskell-wrappers"
185 -> putStr (gen_wrappers p_o_specs)
186
187 "--make-haskell-source"
188 -> putStr (gen_hs_source p_o_specs)
189
190 "--make-ext-core-source"
191 -> putStr (gen_ext_core_source entries)
192
193 "--make-latex-doc"
194 -> putStr (gen_latex_doc p_o_specs)
195
196 _ -> error "Should not happen, known_args out of sync?"
197 )
198
199 known_args :: [String]
200 known_args
201 = [ "--data-decl",
202 "--has-side-effects",
203 "--out-of-line",
204 "--commutable",
205 "--code-size",
206 "--can-fail",
207 "--strictness",
208 "--fixity",
209 "--primop-primop-info",
210 "--primop-tag",
211 "--primop-list",
212 "--primop-vector-uniques",
213 "--primop-vector-tys",
214 "--primop-vector-tys-exports",
215 "--primop-vector-tycons",
216 "--make-haskell-wrappers",
217 "--make-haskell-source",
218 "--make-ext-core-source",
219 "--make-latex-doc"
220 ]
221
222 ------------------------------------------------------------------
223 -- Code generators -----------------------------------------------
224 ------------------------------------------------------------------
225
226 gen_hs_source :: Info -> String
227 gen_hs_source (Info defaults entries) =
228 "{-\n"
229 ++ "This is a generated file (generated by genprimopcode).\n"
230 ++ "It is not code to actually be used. Its only purpose is to be\n"
231 ++ "consumed by haddock.\n"
232 ++ "-}\n"
233 ++ "\n"
234 ++ "-----------------------------------------------------------------------------\n"
235 ++ "-- |\n"
236 ++ "-- Module : GHC.Prim\n"
237 ++ "-- \n"
238 ++ "-- Maintainer : ghc-devs@haskell.org\n"
239 ++ "-- Stability : internal\n"
240 ++ "-- Portability : non-portable (GHC extensions)\n"
241 ++ "--\n"
242 ++ "-- GHC\'s primitive types and operations.\n"
243 ++ "-- Use GHC.Exts from the base package instead of importing this\n"
244 ++ "-- module directly.\n"
245 ++ "--\n"
246 ++ "-----------------------------------------------------------------------------\n"
247 ++ "{-# LANGUAGE MagicHash, MultiParamTypeClasses, NoImplicitPrelude, UnboxedTuples #-}\n"
248 ++ "module GHC.Prim (\n"
249 ++ unlines (map (("\t" ++) . hdr) entries')
250 ++ ") where\n"
251 ++ "\n"
252 ++ "{-\n"
253 ++ unlines (map opt defaults)
254 ++ "-}\n"
255 ++ unlines (concatMap ent entries') ++ "\n\n\n"
256 where entries' = concatMap desugarVectorSpec entries
257
258 opt (OptionFalse n) = n ++ " = False"
259 opt (OptionTrue n) = n ++ " = True"
260 opt (OptionString n v) = n ++ " = { " ++ v ++ "}"
261 opt (OptionInteger n v) = n ++ " = " ++ show v
262 opt (OptionVector _) = ""
263 opt (OptionFixity mf) = "fixity" ++ " = " ++ show mf
264
265 hdr s@(Section {}) = sec s
266 hdr (PrimOpSpec { name = n }) = wrapOp n ++ ","
267 hdr (PrimVecOpSpec { name = n }) = wrapOp n ++ ","
268 hdr (PseudoOpSpec { name = n }) = wrapOp n ++ ","
269 hdr (PrimTypeSpec { ty = TyApp (TyCon n) _ }) = wrapTy n ++ ","
270 hdr (PrimTypeSpec {}) = error $ "Illegal type spec"
271 hdr (PrimClassSpec { cls = TyApp (TyCon n) _ }) = wrapTy n ++ ","
272 hdr (PrimClassSpec {}) = error "Illegal class spec"
273 hdr (PrimVecTypeSpec { ty = TyApp (VecTyCon n _) _ }) = wrapTy n ++ ","
274 hdr (PrimVecTypeSpec {}) = error $ "Illegal type spec"
275
276 ent (Section {}) = []
277 ent o@(PrimOpSpec {}) = spec o
278 ent o@(PrimVecOpSpec {}) = spec o
279 ent o@(PrimTypeSpec {}) = spec o
280 ent o@(PrimClassSpec {}) = spec o
281 ent o@(PrimVecTypeSpec {}) = spec o
282 ent o@(PseudoOpSpec {}) = spec o
283
284 sec s = "\n-- * " ++ escape (title s) ++ "\n"
285 ++ (unlines $ map ("-- " ++ ) $ lines $ unlatex $ escape $ "|" ++ desc s) ++ "\n"
286
287 spec o = comm : decls
288 where decls = case o of
289 PrimOpSpec { name = n, ty = t, opts = options } ->
290 [ pprFixity fixity n | OptionFixity (Just fixity) <- options ]
291 ++
292 [ wrapOp n ++ " :: " ++ pprTy t,
293 wrapOp n ++ " = let x = x in x" ]
294 PrimVecOpSpec { name = n, ty = t, opts = options } ->
295 [ pprFixity fixity n | OptionFixity (Just fixity) <- options ]
296 ++
297 [ wrapOp n ++ " :: " ++ pprTy t,
298 wrapOp n ++ " = let x = x in x" ]
299 PseudoOpSpec { name = n, ty = t } ->
300 [ wrapOp n ++ " :: " ++ pprTy t,
301 wrapOp n ++ " = let x = x in x" ]
302 PrimTypeSpec { ty = t } ->
303 [ "data " ++ pprTy t ]
304 PrimClassSpec { cls = t } ->
305 [ "class " ++ pprTy t ]
306 PrimVecTypeSpec { ty = t } ->
307 [ "data " ++ pprTy t ]
308 Section { } -> []
309
310 comm = case (desc o) of
311 [] -> ""
312 d -> "\n" ++ (unlines $ map ("-- " ++ ) $ lines $ unlatex $ escape $ "|" ++ d)
313
314 wrapOp nm | isAlpha (head nm) = nm
315 | otherwise = "(" ++ nm ++ ")"
316 wrapTy nm | isAlpha (head nm) = nm
317 | otherwise = "(" ++ nm ++ ")"
318 unlatex s = case s of
319 '\\':'t':'e':'x':'t':'t':'t':'{':cs -> markup "@" "@" cs
320 '{':'\\':'t':'t':cs -> markup "@" "@" cs
321 '{':'\\':'i':'t':cs -> markup "/" "/" cs
322 c : cs -> c : unlatex cs
323 [] -> []
324 markup s t xs = s ++ mk (dropWhile isSpace xs)
325 where mk "" = t
326 mk ('\n':cs) = ' ' : mk cs
327 mk ('}':cs) = t ++ unlatex cs
328 mk (c:cs) = c : mk cs
329 escape = concatMap (\c -> if c `elem` special then '\\':c:[] else c:[])
330 where special = "/'`\"@<"
331
332 pprFixity (Fixity i d) n = pprFixityDir d ++ " " ++ show i ++ " " ++ n
333
334 pprTy :: Ty -> String
335 pprTy = pty
336 where
337 pty (TyF t1 t2) = pbty t1 ++ " -> " ++ pty t2
338 pty (TyC t1 t2) = pbty t1 ++ " => " ++ pty t2
339 pty t = pbty t
340 pbty (TyApp tc ts) = show tc ++ concat (map (' ' :) (map paty ts))
341 pbty (TyUTup ts) = "(# "
342 ++ concat (intersperse "," (map pty ts))
343 ++ " #)"
344 pbty t = paty t
345
346 paty (TyVar tv) = tv
347 paty t = "(" ++ pty t ++ ")"
348 --
349 -- Generates the type environment that the stand-alone External Core tools use.
350 gen_ext_core_source :: [Entry] -> String
351 gen_ext_core_source entries =
352 "-----------------------------------------------------------------------\n"
353 ++ "-- This module is automatically generated by the GHC utility\n"
354 ++ "-- \"genprimopcode\". Do not edit!\n"
355 ++ "-----------------------------------------------------------------------\n"
356 ++ "module Language.Core.PrimEnv(primTcs, primVals, intLitTypes, ratLitTypes,"
357 ++ "\n charLitTypes, stringLitTypes) where\nimport Language.Core.Core"
358 ++ "\nimport Language.Core.Encoding\n\n"
359 ++ "primTcs :: [(Tcon, Kind)]\n"
360 ++ "primTcs = [\n"
361 ++ printList tcEnt entries
362 ++ " ]\n"
363 ++ "primVals :: [(Var, Ty)]\n"
364 ++ "primVals = [\n"
365 ++ printList valEnt entries
366 ++ "]\n"
367 ++ "intLitTypes :: [Ty]\n"
368 ++ "intLitTypes = [\n"
369 ++ printList tyEnt (intLitTys entries)
370 ++ "]\n"
371 ++ "ratLitTypes :: [Ty]\n"
372 ++ "ratLitTypes = [\n"
373 ++ printList tyEnt (ratLitTys entries)
374 ++ "]\n"
375 ++ "charLitTypes :: [Ty]\n"
376 ++ "charLitTypes = [\n"
377 ++ printList tyEnt (charLitTys entries)
378 ++ "]\n"
379 ++ "stringLitTypes :: [Ty]\n"
380 ++ "stringLitTypes = [\n"
381 ++ printList tyEnt (stringLitTys entries)
382 ++ "]\n\n"
383
384 where printList f = concat . intersperse ",\n" . filter (not . null) . map f
385 tcEnt (PrimTypeSpec {ty=t}) =
386 case t of
387 TyApp tc args -> parens (show tc) (tcKind tc args)
388 _ -> error ("tcEnt: type in PrimTypeSpec is not a type"
389 ++ " constructor: " ++ show t)
390 tcEnt _ = ""
391 -- hack alert!
392 -- The primops.txt.pp format doesn't have enough information in it to
393 -- print out some of the information that ext-core needs (like kinds,
394 -- and later on in this code, module names) so we special-case. An
395 -- alternative would be to refer to things indirectly and hard-wire
396 -- certain things (e.g., the kind of the Any constructor, here) into
397 -- ext-core's Prims module again.
398 tcKind (TyCon "Any") _ = "Klifted"
399 tcKind tc [] | last (show tc) == '#' = "Kunlifted"
400 tcKind _ [] | otherwise = "Klifted"
401 -- assumes that all type arguments are lifted (are they?)
402 tcKind tc (_v:as) = "(Karrow Klifted " ++ tcKind tc as
403 ++ ")"
404 valEnt (PseudoOpSpec {name=n, ty=t}) = valEntry n t
405 valEnt (PrimOpSpec {name=n, ty=t}) = valEntry n t
406 valEnt _ = ""
407 valEntry name' ty' = parens name' (mkForallTy (freeTvars ty') (pty ty'))
408 where pty (TyF t1 t2) = mkFunTy (pty t1) (pty t2)
409 pty (TyC t1 t2) = mkFunTy (pty t1) (pty t2)
410 pty (TyApp tc ts) = mkTconApp (mkTcon tc) (map pty ts)
411 pty (TyUTup ts) = mkUtupleTy (map pty ts)
412 pty (TyVar tv) = paren $ "Tvar \"" ++ tv ++ "\""
413
414 mkFunTy s1 s2 = "Tapp " ++ (paren ("Tapp (Tcon tcArrow)"
415 ++ " " ++ paren s1))
416 ++ " " ++ paren s2
417 mkTconApp tc args = foldl tapp tc args
418 mkTcon tc = paren $ "Tcon " ++ paren (qualify True (show tc))
419 mkUtupleTy args = foldl tapp (tcUTuple (length args)) args
420 mkForallTy [] t = t
421 mkForallTy vs t = foldr
422 (\ v s -> "Tforall " ++
423 (paren (quote v ++ ", " ++ vKind v)) ++ " "
424 ++ paren s) t vs
425
426 -- hack alert!
427 vKind "o" = "Kopen"
428 vKind _ = "Klifted"
429
430 freeTvars (TyF t1 t2) = freeTvars t1 `union` freeTvars t2
431 freeTvars (TyC t1 t2) = freeTvars t1 `union` freeTvars t2
432 freeTvars (TyApp _ tys) = freeTvarss tys
433 freeTvars (TyVar v) = [v]
434 freeTvars (TyUTup tys) = freeTvarss tys
435 freeTvarss = nub . concatMap freeTvars
436
437 tapp s nextArg = paren $ "Tapp " ++ s ++ " " ++ paren nextArg
438 tcUTuple n = paren $ "Tcon " ++ paren (qualify False $ "Z"
439 ++ show n ++ "H")
440
441 tyEnt (PrimTypeSpec {ty=(TyApp tc _args)}) = " " ++ paren ("Tcon " ++
442 (paren (qualify True (show tc))))
443 tyEnt _ = ""
444
445 -- more hacks. might be better to do this on the ext-core side,
446 -- as per earlier comment
447 qualify _ tc | tc == "Bool" = "Just boolMname" ++ ", "
448 ++ ze True tc
449 qualify _ tc | tc == "()" = "Just baseMname" ++ ", "
450 ++ ze True tc
451 qualify enc tc = "Just primMname" ++ ", " ++ (ze enc tc)
452 ze enc tc = (if enc then "zEncodeString " else "")
453 ++ "\"" ++ tc ++ "\""
454
455 intLitTys = prefixes ["Int", "Word", "Addr", "Char"]
456 ratLitTys = prefixes ["Float", "Double"]
457 charLitTys = prefixes ["Char"]
458 stringLitTys = prefixes ["Addr"]
459 prefixes ps = filter (\ t ->
460 case t of
461 (PrimTypeSpec {ty=(TyApp tc _args)}) ->
462 any (\ p -> p `isPrefixOf` show tc) ps
463 _ -> False)
464
465 parens n ty' = " (zEncodeString \"" ++ n ++ "\", " ++ ty' ++ ")"
466 paren s = "(" ++ s ++ ")"
467 quote s = "\"" ++ s ++ "\""
468
469 gen_latex_doc :: Info -> String
470 gen_latex_doc (Info defaults entries)
471 = "\\primopdefaults{"
472 ++ mk_options defaults
473 ++ "}\n"
474 ++ (concat (map mk_entry entries))
475 where mk_entry (PrimOpSpec {cons=constr,name=n,ty=t,cat=c,desc=d,opts=o}) =
476 "\\primopdesc{"
477 ++ latex_encode constr ++ "}{"
478 ++ latex_encode n ++ "}{"
479 ++ latex_encode (zencode n) ++ "}{"
480 ++ latex_encode (show c) ++ "}{"
481 ++ latex_encode (mk_source_ty t) ++ "}{"
482 ++ latex_encode (mk_core_ty t) ++ "}{"
483 ++ d ++ "}{"
484 ++ mk_options o
485 ++ "}\n"
486 mk_entry (PrimVecOpSpec {}) =
487 ""
488 mk_entry (Section {title=ti,desc=d}) =
489 "\\primopsection{"
490 ++ latex_encode ti ++ "}{"
491 ++ d ++ "}\n"
492 mk_entry (PrimTypeSpec {ty=t,desc=d,opts=o}) =
493 "\\primtypespec{"
494 ++ latex_encode (mk_source_ty t) ++ "}{"
495 ++ latex_encode (mk_core_ty t) ++ "}{"
496 ++ d ++ "}{"
497 ++ mk_options o
498 ++ "}\n"
499 mk_entry (PrimClassSpec {cls=t,desc=d,opts=o}) =
500 "\\primclassspec{"
501 ++ latex_encode (mk_source_ty t) ++ "}{"
502 ++ latex_encode (mk_core_ty t) ++ "}{"
503 ++ d ++ "}{"
504 ++ mk_options o
505 ++ "}\n"
506 mk_entry (PrimVecTypeSpec {}) =
507 ""
508 mk_entry (PseudoOpSpec {name=n,ty=t,desc=d,opts=o}) =
509 "\\pseudoopspec{"
510 ++ latex_encode (zencode n) ++ "}{"
511 ++ latex_encode (mk_source_ty t) ++ "}{"
512 ++ latex_encode (mk_core_ty t) ++ "}{"
513 ++ d ++ "}{"
514 ++ mk_options o
515 ++ "}\n"
516 mk_source_ty typ = pty typ
517 where pty (TyF t1 t2) = pbty t1 ++ " -> " ++ pty t2
518 pty (TyC t1 t2) = pbty t1 ++ " => " ++ pty t2
519 pty t = pbty t
520 pbty (TyApp tc ts) = show tc ++ (concat (map (' ':) (map paty ts)))
521 pbty (TyUTup ts) = "(# " ++ (concat (intersperse "," (map pty ts))) ++ " #)"
522 pbty t = paty t
523 paty (TyVar tv) = tv
524 paty t = "(" ++ pty t ++ ")"
525
526 mk_core_ty typ = foralls ++ (pty typ)
527 where pty (TyF t1 t2) = pbty t1 ++ " -> " ++ pty t2
528 pty (TyC t1 t2) = pbty t1 ++ " => " ++ pty t2
529 pty t = pbty t
530 pbty (TyApp tc ts) = (zencode (show tc)) ++ (concat (map (' ':) (map paty ts)))
531 pbty (TyUTup ts) = (zencode (utuplenm (length ts))) ++ (concat ((map (' ':) (map paty ts))))
532 pbty t = paty t
533 paty (TyVar tv) = zencode tv
534 paty (TyApp tc []) = zencode (show tc)
535 paty t = "(" ++ pty t ++ ")"
536 utuplenm 1 = "(# #)"
537 utuplenm n = "(#" ++ (replicate (n-1) ',') ++ "#)"
538 foralls = if tvars == [] then "" else "%forall " ++ (tbinds tvars)
539 tvars = tvars_of typ
540 tbinds [] = ". "
541 tbinds ("o":tbs) = "(o::?) " ++ (tbinds tbs)
542 tbinds (tv:tbs) = tv ++ " " ++ (tbinds tbs)
543 tvars_of (TyF t1 t2) = tvars_of t1 `union` tvars_of t2
544 tvars_of (TyC t1 t2) = tvars_of t1 `union` tvars_of t2
545 tvars_of (TyApp _ ts) = foldl union [] (map tvars_of ts)
546 tvars_of (TyUTup ts) = foldr union [] (map tvars_of ts)
547 tvars_of (TyVar tv) = [tv]
548
549 mk_options o =
550 "\\primoptions{"
551 ++ mk_has_side_effects o ++ "}{"
552 ++ mk_out_of_line o ++ "}{"
553 ++ mk_commutable o ++ "}{"
554 ++ mk_needs_wrapper o ++ "}{"
555 ++ mk_can_fail o ++ "}{"
556 ++ mk_fixity o ++ "}{"
557 ++ latex_encode (mk_strictness o) ++ "}{"
558 ++ "}"
559
560 mk_has_side_effects o = mk_bool_opt o "has_side_effects" "Has side effects." "Has no side effects."
561 mk_out_of_line o = mk_bool_opt o "out_of_line" "Implemented out of line." "Implemented in line."
562 mk_commutable o = mk_bool_opt o "commutable" "Commutable." "Not commutable."
563 mk_needs_wrapper o = mk_bool_opt o "needs_wrapper" "Needs wrapper." "Needs no wrapper."
564 mk_can_fail o = mk_bool_opt o "can_fail" "Can fail." "Cannot fail."
565
566 mk_bool_opt o opt_name if_true if_false =
567 case lookup_attrib opt_name o of
568 Just (OptionTrue _) -> if_true
569 Just (OptionFalse _) -> if_false
570 Just (OptionString _ _) -> error "String value for boolean option"
571 Just (OptionInteger _ _) -> error "Integer value for boolean option"
572 Just (OptionFixity _) -> error "Fixity value for boolean option"
573 Just (OptionVector _) -> error "vector template for boolean option"
574 Nothing -> ""
575
576 mk_strictness o =
577 case lookup_attrib "strictness" o of
578 Just (OptionString _ s) -> s -- for now
579 Just _ -> error "Wrong value for strictness"
580 Nothing -> ""
581
582 mk_fixity o = case lookup_attrib "fixity" o of
583 Just (OptionFixity (Just (Fixity i d)))
584 -> pprFixityDir d ++ " " ++ show i
585 _ -> ""
586
587 zencode xs =
588 case maybe_tuple xs of
589 Just n -> n -- Tuples go to Z2T etc
590 Nothing -> concat (map encode_ch xs)
591 where
592 maybe_tuple "(# #)" = Just("Z1H")
593 maybe_tuple ('(' : '#' : cs) = case count_commas (0::Int) cs of
594 (n, '#' : ')' : _) -> Just ('Z' : shows (n+1) "H")
595 _ -> Nothing
596 maybe_tuple "()" = Just("Z0T")
597 maybe_tuple ('(' : cs) = case count_commas (0::Int) cs of
598 (n, ')' : _) -> Just ('Z' : shows (n+1) "T")
599 _ -> Nothing
600 maybe_tuple _ = Nothing
601
602 count_commas :: Int -> String -> (Int, String)
603 count_commas n (',' : cs) = count_commas (n+1) cs
604 count_commas n cs = (n,cs)
605
606 unencodedChar :: Char -> Bool -- True for chars that don't need encoding
607 unencodedChar 'Z' = False
608 unencodedChar 'z' = False
609 unencodedChar c = isAlphaNum c
610
611 encode_ch :: Char -> String
612 encode_ch c | unencodedChar c = [c] -- Common case first
613
614 -- Constructors
615 encode_ch '(' = "ZL" -- Needed for things like (,), and (->)
616 encode_ch ')' = "ZR" -- For symmetry with (
617 encode_ch '[' = "ZM"
618 encode_ch ']' = "ZN"
619 encode_ch ':' = "ZC"
620 encode_ch 'Z' = "ZZ"
621
622 -- Variables
623 encode_ch 'z' = "zz"
624 encode_ch '&' = "za"
625 encode_ch '|' = "zb"
626 encode_ch '^' = "zc"
627 encode_ch '$' = "zd"
628 encode_ch '=' = "ze"
629 encode_ch '>' = "zg"
630 encode_ch '#' = "zh"
631 encode_ch '.' = "zi"
632 encode_ch '<' = "zl"
633 encode_ch '-' = "zm"
634 encode_ch '!' = "zn"
635 encode_ch '+' = "zp"
636 encode_ch '\'' = "zq"
637 encode_ch '\\' = "zr"
638 encode_ch '/' = "zs"
639 encode_ch '*' = "zt"
640 encode_ch '_' = "zu"
641 encode_ch '%' = "zv"
642 encode_ch c = 'z' : shows (ord c) "U"
643
644 latex_encode [] = []
645 latex_encode (c:cs) | c `elem` "#$%&_^{}" = "\\" ++ c:(latex_encode cs)
646 latex_encode ('~':cs) = "\\verb!~!" ++ (latex_encode cs)
647 latex_encode ('\\':cs) = "$\\backslash$" ++ (latex_encode cs)
648 latex_encode (c:cs) = c:(latex_encode cs)
649
650 gen_wrappers :: Info -> String
651 gen_wrappers (Info _ entries)
652 = "{-# LANGUAGE MagicHash, NoImplicitPrelude, UnboxedTuples #-}\n"
653 -- Dependencies on Prelude must be explicit in libraries/base, but we
654 -- don't need the Prelude here so we add NoImplicitPrelude.
655 ++ "module GHC.PrimopWrappers where\n"
656 ++ "import qualified GHC.Prim\n"
657 ++ "import GHC.Tuple ()\n"
658 ++ "import GHC.Prim (" ++ types ++ ")\n"
659 ++ unlines (concatMap f specs)
660 where
661 specs = filter (not.dodgy) $
662 filter (not.is_llvm_only) $
663 filter is_primop entries
664 tycons = foldr union [] $ map (tyconsIn . ty) specs
665 tycons' = filter (`notElem` [TyCon "()", TyCon "Bool"]) tycons
666 types = concat $ intersperse ", " $ map show tycons'
667 f spec = let args = map (\n -> "a" ++ show n) [1 .. arity (ty spec)]
668 src_name = wrap (name spec)
669 lhs = src_name ++ " " ++ unwords args
670 rhs = "(GHC.Prim." ++ name spec ++ ") " ++ unwords args
671 in ["{-# NOINLINE " ++ src_name ++ " #-}",
672 src_name ++ " :: " ++ pprTy (ty spec),
673 lhs ++ " = " ++ rhs]
674 wrap nm | isLower (head nm) = nm
675 | otherwise = "(" ++ nm ++ ")"
676
677 dodgy spec
678 = name spec `elem`
679 [-- C code generator can't handle these
680 "seq#",
681 "tagToEnum#",
682 -- not interested in parallel support
683 "par#", "parGlobal#", "parLocal#", "parAt#",
684 "parAtAbs#", "parAtRel#", "parAtForNow#"
685 ]
686
687 is_llvm_only :: Entry -> Bool
688 is_llvm_only entry =
689 case lookup_attrib "llvm_only" (opts entry) of
690 Just (OptionTrue _) -> True
691 _ -> False
692
693 gen_primop_list :: Info -> String
694 gen_primop_list (Info _ entries)
695 = unlines (
696 [ " [" ++ cons first ]
697 ++
698 map (\p -> " , " ++ cons p) rest
699 ++
700 [ " ]" ]
701 ) where (first:rest) = concatMap desugarVectorSpec (filter is_primop entries)
702
703 mIN_VECTOR_UNIQUE :: Int
704 mIN_VECTOR_UNIQUE = 300
705
706 gen_primop_vector_uniques :: Info -> String
707 gen_primop_vector_uniques (Info _ entries)
708 = unlines $
709 concatMap mkVecUnique (specs `zip` [mIN_VECTOR_UNIQUE..])
710 where
711 specs = concatMap desugarVectorSpec (filter is_vector (filter is_primtype entries))
712
713 mkVecUnique :: (Entry, Int) -> [String]
714 mkVecUnique (i, unique) =
715 [ key_id ++ " :: Unique"
716 , key_id ++ " = mkPreludeTyConUnique " ++ show unique
717 ]
718 where
719 key_id = prefix i ++ "PrimTyConKey"
720
721 gen_primop_vector_tys :: Info -> String
722 gen_primop_vector_tys (Info _ entries)
723 = unlines $
724 concatMap mkVecTypes specs
725 where
726 specs = concatMap desugarVectorSpec (filter is_vector (filter is_primtype entries))
727
728 mkVecTypes :: Entry -> [String]
729 mkVecTypes i =
730 [ name_id ++ " :: Name"
731 , name_id ++ " = mkPrimTc (fsLit \"" ++ pprTy (ty i) ++ "\") " ++ key_id ++ " " ++ tycon_id
732 , ty_id ++ " :: Type"
733 , ty_id ++ " = mkTyConTy " ++ tycon_id
734 , tycon_id ++ " :: TyCon"
735 , tycon_id ++ " = pcPrimTyCon0 " ++ name_id ++
736 " (VecRep " ++ show (veclen i) ++ " " ++ elemrep i ++ ")"
737 ]
738 where
739 key_id = prefix i ++ "PrimTyConKey"
740 name_id = prefix i ++ "PrimTyConName"
741 ty_id = prefix i ++ "PrimTy"
742 tycon_id = prefix i ++ "PrimTyCon"
743
744 gen_primop_vector_tys_exports :: Info -> String
745 gen_primop_vector_tys_exports (Info _ entries)
746 = unlines $
747 map mkVecTypes specs
748 where
749 specs = concatMap desugarVectorSpec (filter is_vector (filter is_primtype entries))
750
751 mkVecTypes :: Entry -> String
752 mkVecTypes i =
753 "\t" ++ ty_id ++ ", " ++ tycon_id ++ ","
754 where
755 ty_id = prefix i ++ "PrimTy"
756 tycon_id = prefix i ++ "PrimTyCon"
757
758 gen_primop_vector_tycons :: Info -> String
759 gen_primop_vector_tycons (Info _ entries)
760 = unlines $
761 map mkVecTypes specs
762 where
763 specs = concatMap desugarVectorSpec (filter is_vector (filter is_primtype entries))
764
765 mkVecTypes :: Entry -> String
766 mkVecTypes i =
767 " , " ++ tycon_id
768 where
769 tycon_id = prefix i ++ "PrimTyCon"
770
771 gen_primop_tag :: Info -> String
772 gen_primop_tag (Info _ entries)
773 = unlines (max_def_type : max_def :
774 tagOf_type : zipWith f primop_entries [1 :: Int ..])
775 where
776 primop_entries = concatMap desugarVectorSpec $ filter is_primop entries
777 tagOf_type = "tagOf_PrimOp :: PrimOp -> FastInt"
778 f i n = "tagOf_PrimOp " ++ cons i ++ " = _ILIT(" ++ show n ++ ")"
779 max_def_type = "maxPrimOpTag :: Int"
780 max_def = "maxPrimOpTag = " ++ show (length primop_entries)
781
782 gen_data_decl :: Info -> String
783 gen_data_decl (Info _ entries) =
784 "data PrimOp\n = " ++ head conss ++ "\n"
785 ++ unlines (map (" | "++) (tail conss))
786 where
787 conss = map genCons (filter is_primop entries)
788
789 genCons :: Entry -> String
790 genCons entry =
791 case vecOptions entry of
792 [] -> cons entry
793 _ -> cons entry ++ " PrimOpVecCat Length Width"
794
795 gen_switch_from_attribs :: String -> String -> Info -> String
796 gen_switch_from_attribs attrib_name fn_name (Info defaults entries)
797 = let defv = lookup_attrib attrib_name defaults
798 alternatives = catMaybes (map mkAlt (filter is_primop entries))
799
800 getAltRhs (OptionFalse _) = "False"
801 getAltRhs (OptionTrue _) = "True"
802 getAltRhs (OptionInteger _ i) = show i
803 getAltRhs (OptionString _ s) = s
804 getAltRhs (OptionVector _) = "True"
805 getAltRhs (OptionFixity mf) = show mf
806
807 mkAlt po
808 = case lookup_attrib attrib_name (opts po) of
809 Nothing -> Nothing
810 Just xx -> case vecOptions po of
811 [] -> Just (fn_name ++ " " ++ cons po ++ " = " ++ getAltRhs xx)
812 _ -> Just (fn_name ++ " (" ++ cons po ++ " _ _ _) = " ++ getAltRhs xx)
813
814 in
815 case defv of
816 Nothing -> error ("gen_switch_from: " ++ attrib_name)
817 Just xx
818 -> unlines alternatives
819 ++ fn_name ++ " _ = " ++ getAltRhs xx ++ "\n"
820
821 ------------------------------------------------------------------
822 -- Create PrimOpInfo text from PrimOpSpecs -----------------------
823 ------------------------------------------------------------------
824
825 gen_primop_info :: Info -> String
826 gen_primop_info (Info _ entries)
827 = unlines (map mkPOItext (concatMap desugarVectorSpec (filter is_primop entries)))
828
829 mkPOItext :: Entry -> String
830 mkPOItext i = mkPOI_LHS_text i ++ mkPOI_RHS_text i
831
832 mkPOI_LHS_text :: Entry -> String
833 mkPOI_LHS_text i
834 = "primOpInfo " ++ cons i ++ " = "
835
836 mkPOI_RHS_text :: Entry -> String
837 mkPOI_RHS_text i
838 = case cat i of
839 Compare
840 -> case ty i of
841 TyF t1 (TyF _ _)
842 -> "mkCompare " ++ sl_name i ++ ppType t1
843 _ -> error "Type error in comparison op"
844 Monadic
845 -> case ty i of
846 TyF t1 _
847 -> "mkMonadic " ++ sl_name i ++ ppType t1
848 _ -> error "Type error in monadic op"
849 Dyadic
850 -> case ty i of
851 TyF t1 (TyF _ _)
852 -> "mkDyadic " ++ sl_name i ++ ppType t1
853 _ -> error "Type error in dyadic op"
854 GenPrimOp
855 -> let (argTys, resTy) = flatTys (ty i)
856 tvs = nub (tvsIn (ty i))
857 in
858 "mkGenPrimOp " ++ sl_name i ++ " "
859 ++ listify (map ppTyVar tvs) ++ " "
860 ++ listify (map ppType argTys) ++ " "
861 ++ "(" ++ ppType resTy ++ ")"
862
863 sl_name :: Entry -> String
864 sl_name i = "(fsLit \"" ++ name i ++ "\") "
865
866 ppTyVar :: String -> String
867 ppTyVar "a" = "alphaTyVar"
868 ppTyVar "b" = "betaTyVar"
869 ppTyVar "c" = "gammaTyVar"
870 ppTyVar "s" = "deltaTyVar"
871 ppTyVar "o" = "openAlphaTyVar"
872 ppTyVar _ = error "Unknown type var"
873
874 ppType :: Ty -> String
875 ppType (TyApp (TyCon "Any") []) = "anyTy"
876 ppType (TyApp (TyCon "Bool") []) = "boolTy"
877
878 ppType (TyApp (TyCon "Int#") []) = "intPrimTy"
879 ppType (TyApp (TyCon "Int32#") []) = "int32PrimTy"
880 ppType (TyApp (TyCon "Int64#") []) = "int64PrimTy"
881 ppType (TyApp (TyCon "Char#") []) = "charPrimTy"
882 ppType (TyApp (TyCon "Word#") []) = "wordPrimTy"
883 ppType (TyApp (TyCon "Word32#") []) = "word32PrimTy"
884 ppType (TyApp (TyCon "Word64#") []) = "word64PrimTy"
885 ppType (TyApp (TyCon "Addr#") []) = "addrPrimTy"
886 ppType (TyApp (TyCon "Float#") []) = "floatPrimTy"
887 ppType (TyApp (TyCon "Double#") []) = "doublePrimTy"
888 ppType (TyApp (TyCon "ByteArray#") []) = "byteArrayPrimTy"
889 ppType (TyApp (TyCon "RealWorld") []) = "realWorldTy"
890 ppType (TyApp (TyCon "ThreadId#") []) = "threadIdPrimTy"
891 ppType (TyApp (TyCon "ForeignObj#") []) = "foreignObjPrimTy"
892 ppType (TyApp (TyCon "BCO#") []) = "bcoPrimTy"
893 ppType (TyApp (TyCon "()") []) = "unitTy" -- unitTy is TysWiredIn's name for ()
894
895 ppType (TyVar "a") = "alphaTy"
896 ppType (TyVar "b") = "betaTy"
897 ppType (TyVar "c") = "gammaTy"
898 ppType (TyVar "s") = "deltaTy"
899 ppType (TyVar "o") = "openAlphaTy"
900
901 ppType (TyApp (TyCon "State#") [x]) = "mkStatePrimTy " ++ ppType x
902 ppType (TyApp (TyCon "MutVar#") [x,y]) = "mkMutVarPrimTy " ++ ppType x
903 ++ " " ++ ppType y
904 ppType (TyApp (TyCon "MutableArray#") [x,y]) = "mkMutableArrayPrimTy " ++ ppType x
905 ++ " " ++ ppType y
906 ppType (TyApp (TyCon "MutableArrayArray#") [x]) = "mkMutableArrayArrayPrimTy " ++ ppType x
907 ppType (TyApp (TyCon "MutableByteArray#") [x]) = "mkMutableByteArrayPrimTy "
908 ++ ppType x
909 ppType (TyApp (TyCon "Array#") [x]) = "mkArrayPrimTy " ++ ppType x
910 ppType (TyApp (TyCon "ArrayArray#") []) = "mkArrayArrayPrimTy"
911
912
913 ppType (TyApp (TyCon "Weak#") [x]) = "mkWeakPrimTy " ++ ppType x
914 ppType (TyApp (TyCon "StablePtr#") [x]) = "mkStablePtrPrimTy " ++ ppType x
915 ppType (TyApp (TyCon "StableName#") [x]) = "mkStableNamePrimTy " ++ ppType x
916
917 ppType (TyApp (TyCon "MVar#") [x,y]) = "mkMVarPrimTy " ++ ppType x
918 ++ " " ++ ppType y
919 ppType (TyApp (TyCon "TVar#") [x,y]) = "mkTVarPrimTy " ++ ppType x
920 ++ " " ++ ppType y
921
922 ppType (TyApp (VecTyCon _ pptc) []) = pptc
923
924 ppType (TyUTup ts) = "(mkTupleTy UnboxedTuple "
925 ++ listify (map ppType ts) ++ ")"
926
927 ppType (TyF s d) = "(mkFunTy (" ++ ppType s ++ ") (" ++ ppType d ++ "))"
928 ppType (TyC s d) = "(mkFunTy (" ++ ppType s ++ ") (" ++ ppType d ++ "))"
929
930 ppType other
931 = error ("ppType: can't handle: " ++ show other ++ "\n")
932
933 pprFixityDir :: FixityDirection -> String
934 pprFixityDir InfixN = "infix"
935 pprFixityDir InfixL = "infixl"
936 pprFixityDir InfixR = "infixr"
937
938 listify :: [String] -> String
939 listify ss = "[" ++ concat (intersperse ", " ss) ++ "]"
940
941 flatTys :: Ty -> ([Ty],Ty)
942 flatTys (TyF t1 t2) = case flatTys t2 of (ts,t) -> (t1:ts,t)
943 flatTys (TyC t1 t2) = case flatTys t2 of (ts,t) -> (t1:ts,t)
944 flatTys other = ([],other)
945
946 tvsIn :: Ty -> [TyVar]
947 tvsIn (TyF t1 t2) = tvsIn t1 ++ tvsIn t2
948 tvsIn (TyC t1 t2) = tvsIn t1 ++ tvsIn t2
949 tvsIn (TyApp _ tys) = concatMap tvsIn tys
950 tvsIn (TyVar tv) = [tv]
951 tvsIn (TyUTup tys) = concatMap tvsIn tys
952
953 tyconsIn :: Ty -> [TyCon]
954 tyconsIn (TyF t1 t2) = tyconsIn t1 `union` tyconsIn t2
955 tyconsIn (TyC t1 t2) = tyconsIn t1 `union` tyconsIn t2
956 tyconsIn (TyApp tc tys) = foldr union [tc] $ map tyconsIn tys
957 tyconsIn (TyVar _) = []
958 tyconsIn (TyUTup tys) = foldr union [] $ map tyconsIn tys
959
960 arity :: Ty -> Int
961 arity = length . fst . flatTys
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