1 -----------------------------------------------------------------------------
3 -- Stg to C--: primitive operations
5 -- (c) The University of Glasgow 2004-2006
7 -----------------------------------------------------------------------------
13 #include "HsVersions.h"
25 import Type ( Type, tyConAppTyCon )
36 ------------------------------------------------------------------------
37 -- Primitive operations and foreign calls
38 ------------------------------------------------------------------------
40 {- Note [Foreign call results]
41 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
42 A foreign call always returns an unboxed tuple of results, one
43 of which is the state token. This seems to happen even for pure
46 Even if we returned a single result for pure calls, it'd still be
47 right to wrap it in a singleton unboxed tuple, because the result
48 might be a Haskell closure pointer, we don't want to evaluate it. -}
50 ----------------------------------
51 cgOpApp :: StgOp -- The op
52 -> [StgArg] -- Arguments
53 -> Type -- Result type (always an unboxed tuple)
57 cgOpApp (StgFCallOp fcall _) stg_args res_ty
58 = do { (res_regs, res_hints) <- newUnboxedTupleRegs res_ty
59 -- Choose result regs r1, r2
60 -- Note [Foreign call results]
61 ; cgForeignCall res_regs res_hints fcall stg_args
62 -- r1, r2 = foo( x, y )
63 ; emitReturn (map (CmmReg . CmmLocal) res_regs) }
66 -- tagToEnum# is special: we need to pull the constructor
67 -- out of the table, and perform an appropriate return.
69 cgOpApp (StgPrimOp TagToEnumOp) [arg] res_ty
70 = ASSERT(isEnumerationTyCon tycon)
71 do { args' <- getNonVoidArgAmodes [arg]
72 ; let amode = case args' of [amode] -> amode
73 _ -> panic "TagToEnumOp had void arg"
74 ; emitReturn [tagToClosure tycon amode] }
76 -- If you're reading this code in the attempt to figure
77 -- out why the compiler panic'ed here, it is probably because
78 -- you used tagToEnum# in a non-monomorphic setting, e.g.,
79 -- intToTg :: Enum a => Int -> a ; intToTg (I# x#) = tagToEnum# x#
81 tycon = tyConAppTyCon res_ty
83 cgOpApp (StgPrimOp primop) args res_ty
84 | primOpOutOfLine primop
85 = do { cmm_args <- getNonVoidArgAmodes args
86 ; let fun = CmmLit (CmmLabel (mkRtsPrimOpLabel primop))
87 ; emitCall (PrimOpCall, PrimOpReturn) fun cmm_args }
89 | ReturnsPrim VoidRep <- result_info
90 = do cgPrimOp [] primop args
93 | ReturnsPrim rep <- result_info
94 = do res <- newTemp (primRepCmmType rep)
95 cgPrimOp [res] primop args
96 emitReturn [CmmReg (CmmLocal res)]
98 | ReturnsAlg tycon <- result_info, isUnboxedTupleTyCon tycon
99 = do (regs, _hints) <- newUnboxedTupleRegs res_ty
100 cgPrimOp regs primop args
101 emitReturn (map (CmmReg . CmmLocal) regs)
103 | ReturnsAlg tycon <- result_info
104 , isEnumerationTyCon tycon
105 -- c.f. cgExpr (...TagToEnumOp...)
106 = do tag_reg <- newTemp bWord
107 cgPrimOp [tag_reg] primop args
108 emitReturn [tagToClosure tycon
109 (CmmReg (CmmLocal tag_reg))]
111 | otherwise = panic "cgPrimop"
113 result_info = getPrimOpResultInfo primop
115 cgOpApp (StgPrimCallOp primcall) args _res_ty
116 = do { cmm_args <- getNonVoidArgAmodes args
117 ; let fun = CmmLit (CmmLabel (mkPrimCallLabel primcall))
118 ; emitCall (PrimOpCall, PrimOpReturn) fun cmm_args }
120 ---------------------------------------------------
121 cgPrimOp :: [LocalReg] -- where to put the results
123 -> [StgArg] -- arguments
126 cgPrimOp results op args
127 = do arg_exprs <- getNonVoidArgAmodes args
128 emitPrimOp results op arg_exprs
131 ------------------------------------------------------------------------
132 -- Emitting code for a primop
133 ------------------------------------------------------------------------
135 emitPrimOp :: [LocalReg] -- where to put the results
137 -> [CmmExpr] -- arguments
140 -- First we handle various awkward cases specially. The remaining
141 -- easy cases are then handled by translateOp, defined below.
143 emitPrimOp [res_r,res_c] IntAddCOp [aa,bb]
145 With some bit-twiddling, we can define int{Add,Sub}Czh portably in
146 C, and without needing any comparisons. This may not be the
147 fastest way to do it - if you have better code, please send it! --SDM
149 Return : r = a + b, c = 0 if no overflow, 1 on overflow.
151 We currently don't make use of the r value if c is != 0 (i.e.
152 overflow), we just convert to big integers and try again. This
153 could be improved by making r and c the correct values for
154 plugging into a new J#.
156 { r = ((I_)(a)) + ((I_)(b)); \
157 c = ((StgWord)(~(((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \
158 >> (BITS_IN (I_) - 1); \
160 Wading through the mass of bracketry, it seems to reduce to:
161 c = ( (~(a^b)) & (a^r) ) >>unsigned (BITS_IN(I_)-1)
164 = emit $ catAGraphs [
165 mkAssign (CmmLocal res_r) (CmmMachOp mo_wordAdd [aa,bb]),
166 mkAssign (CmmLocal res_c) $
167 CmmMachOp mo_wordUShr [
168 CmmMachOp mo_wordAnd [
169 CmmMachOp mo_wordNot [CmmMachOp mo_wordXor [aa,bb]],
170 CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)]
172 CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1))
177 emitPrimOp [res_r,res_c] IntSubCOp [aa,bb]
179 #define subIntCzh(r,c,a,b) \
180 { r = ((I_)(a)) - ((I_)(b)); \
181 c = ((StgWord)((((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \
182 >> (BITS_IN (I_) - 1); \
185 c = ((a^b) & (a^r)) >>unsigned (BITS_IN(I_)-1)
187 = emit $ catAGraphs [
188 mkAssign (CmmLocal res_r) (CmmMachOp mo_wordSub [aa,bb]),
189 mkAssign (CmmLocal res_c) $
190 CmmMachOp mo_wordUShr [
191 CmmMachOp mo_wordAnd [
192 CmmMachOp mo_wordXor [aa,bb],
193 CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)]
195 CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1))
200 emitPrimOp [res] ParOp [arg]
202 -- for now, just implement this in a C function
203 -- later, we might want to inline it.
206 (CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "newSpark"))))
207 [(CmmReg (CmmGlobal BaseReg), AddrHint), (arg,AddrHint)]
209 emitPrimOp [res] ReadMutVarOp [mutv]
210 = emit (mkAssign (CmmLocal res) (cmmLoadIndexW mutv fixedHdrSize gcWord))
212 emitPrimOp [] WriteMutVarOp [mutv,var]
214 emit (mkStore (cmmOffsetW mutv fixedHdrSize) var)
217 (CmmLit (CmmLabel mkDirty_MUT_VAR_Label))
218 [(CmmReg (CmmGlobal BaseReg), AddrHint), (mutv,AddrHint)]
220 -- #define sizzeofByteArrayzh(r,a) \
221 -- r = ((StgArrWords *)(a))->bytes
222 emitPrimOp [res] SizeofByteArrayOp [arg]
224 mkAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord)
226 -- #define sizzeofMutableByteArrayzh(r,a) \
227 -- r = ((StgArrWords *)(a))->bytes
228 emitPrimOp [res] SizeofMutableByteArrayOp [arg]
229 = emitPrimOp [res] SizeofByteArrayOp [arg]
232 -- #define touchzh(o) /* nothing */
233 emitPrimOp res@[] TouchOp args@[_arg]
234 = do emitPrimCall res MO_Touch args
236 -- #define byteArrayContentszh(r,a) r = BYTE_ARR_CTS(a)
237 emitPrimOp [res] ByteArrayContents_Char [arg]
238 = emit (mkAssign (CmmLocal res) (cmmOffsetB arg arrWordsHdrSize))
240 -- #define stableNameToIntzh(r,s) (r = ((StgStableName *)s)->sn)
241 emitPrimOp [res] StableNameToIntOp [arg]
242 = emit (mkAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord))
244 -- #define eqStableNamezh(r,sn1,sn2) \
245 -- (r = (((StgStableName *)sn1)->sn == ((StgStableName *)sn2)->sn))
246 emitPrimOp [res] EqStableNameOp [arg1,arg2]
247 = emit (mkAssign (CmmLocal res) (CmmMachOp mo_wordEq [
248 cmmLoadIndexW arg1 fixedHdrSize bWord,
249 cmmLoadIndexW arg2 fixedHdrSize bWord
253 emitPrimOp [res] ReallyUnsafePtrEqualityOp [arg1,arg2]
254 = emit (mkAssign (CmmLocal res) (CmmMachOp mo_wordEq [arg1,arg2]))
256 -- #define addrToHValuezh(r,a) r=(P_)a
257 emitPrimOp [res] AddrToHValueOp [arg]
258 = emit (mkAssign (CmmLocal res) arg)
260 -- #define dataToTagzh(r,a) r=(GET_TAG(((StgClosure *)a)->header.info))
261 -- Note: argument may be tagged!
262 emitPrimOp [res] DataToTagOp [arg]
263 = emit (mkAssign (CmmLocal res) (getConstrTag (cmmUntag arg)))
265 {- Freezing arrays-of-ptrs requires changing an info table, for the
266 benefit of the generational collector. It needs to scavenge mutable
267 objects, even if they are in old space. When they become immutable,
268 they can be removed from this scavenge list. -}
270 -- #define unsafeFreezzeArrayzh(r,a)
272 -- SET_INFO((StgClosure *)a,&stg_MUT_ARR_PTRS_FROZEN0_info);
275 emitPrimOp [res] UnsafeFreezeArrayOp [arg]
277 [ setInfo arg (CmmLit (CmmLabel mkMAP_FROZEN_infoLabel)),
278 mkAssign (CmmLocal res) arg ]
280 -- #define unsafeFreezzeByteArrayzh(r,a) r=(a)
281 emitPrimOp [res] UnsafeFreezeByteArrayOp [arg]
282 = emit (mkAssign (CmmLocal res) arg)
284 -- Reading/writing pointer arrays
286 emitPrimOp [r] ReadArrayOp [obj,ix] = doReadPtrArrayOp r obj ix
287 emitPrimOp [r] IndexArrayOp [obj,ix] = doReadPtrArrayOp r obj ix
288 emitPrimOp [] WriteArrayOp [obj,ix,v] = doWritePtrArrayOp obj ix v
290 emitPrimOp [res] SizeofArrayOp [arg]
291 = emit $ mkAssign (CmmLocal res) (cmmLoadIndexW arg (fixedHdrSize + oFFSET_StgMutArrPtrs_ptrs) bWord)
292 emitPrimOp [res] SizeofMutableArrayOp [arg]
293 = emitPrimOp [res] SizeofArrayOp [arg]
297 emitPrimOp res IndexOffAddrOp_Char args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
298 emitPrimOp res IndexOffAddrOp_WideChar args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
299 emitPrimOp res IndexOffAddrOp_Int args = doIndexOffAddrOp Nothing bWord res args
300 emitPrimOp res IndexOffAddrOp_Word args = doIndexOffAddrOp Nothing bWord res args
301 emitPrimOp res IndexOffAddrOp_Addr args = doIndexOffAddrOp Nothing bWord res args
302 emitPrimOp res IndexOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
303 emitPrimOp res IndexOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
304 emitPrimOp res IndexOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing bWord res args
305 emitPrimOp res IndexOffAddrOp_Int8 args = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args
306 emitPrimOp res IndexOffAddrOp_Int16 args = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args
307 emitPrimOp res IndexOffAddrOp_Int32 args = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args
308 emitPrimOp res IndexOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
309 emitPrimOp res IndexOffAddrOp_Word8 args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
310 emitPrimOp res IndexOffAddrOp_Word16 args = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args
311 emitPrimOp res IndexOffAddrOp_Word32 args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
312 emitPrimOp res IndexOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
314 -- ReadXXXoffAddr, which are identical, for our purposes, to IndexXXXoffAddr.
316 emitPrimOp res ReadOffAddrOp_Char args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
317 emitPrimOp res ReadOffAddrOp_WideChar args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
318 emitPrimOp res ReadOffAddrOp_Int args = doIndexOffAddrOp Nothing bWord res args
319 emitPrimOp res ReadOffAddrOp_Word args = doIndexOffAddrOp Nothing bWord res args
320 emitPrimOp res ReadOffAddrOp_Addr args = doIndexOffAddrOp Nothing bWord res args
321 emitPrimOp res ReadOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
322 emitPrimOp res ReadOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
323 emitPrimOp res ReadOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing bWord res args
324 emitPrimOp res ReadOffAddrOp_Int8 args = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args
325 emitPrimOp res ReadOffAddrOp_Int16 args = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args
326 emitPrimOp res ReadOffAddrOp_Int32 args = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args
327 emitPrimOp res ReadOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
328 emitPrimOp res ReadOffAddrOp_Word8 args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
329 emitPrimOp res ReadOffAddrOp_Word16 args = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args
330 emitPrimOp res ReadOffAddrOp_Word32 args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
331 emitPrimOp res ReadOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
335 emitPrimOp res IndexByteArrayOp_Char args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
336 emitPrimOp res IndexByteArrayOp_WideChar args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
337 emitPrimOp res IndexByteArrayOp_Int args = doIndexByteArrayOp Nothing bWord res args
338 emitPrimOp res IndexByteArrayOp_Word args = doIndexByteArrayOp Nothing bWord res args
339 emitPrimOp res IndexByteArrayOp_Addr args = doIndexByteArrayOp Nothing bWord res args
340 emitPrimOp res IndexByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
341 emitPrimOp res IndexByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
342 emitPrimOp res IndexByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing bWord res args
343 emitPrimOp res IndexByteArrayOp_Int8 args = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args
344 emitPrimOp res IndexByteArrayOp_Int16 args = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args
345 emitPrimOp res IndexByteArrayOp_Int32 args = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args
346 emitPrimOp res IndexByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
347 emitPrimOp res IndexByteArrayOp_Word8 args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
348 emitPrimOp res IndexByteArrayOp_Word16 args = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args
349 emitPrimOp res IndexByteArrayOp_Word32 args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
350 emitPrimOp res IndexByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
352 -- ReadXXXArray, identical to IndexXXXArray.
354 emitPrimOp res ReadByteArrayOp_Char args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
355 emitPrimOp res ReadByteArrayOp_WideChar args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
356 emitPrimOp res ReadByteArrayOp_Int args = doIndexByteArrayOp Nothing bWord res args
357 emitPrimOp res ReadByteArrayOp_Word args = doIndexByteArrayOp Nothing bWord res args
358 emitPrimOp res ReadByteArrayOp_Addr args = doIndexByteArrayOp Nothing bWord res args
359 emitPrimOp res ReadByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
360 emitPrimOp res ReadByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
361 emitPrimOp res ReadByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing bWord res args
362 emitPrimOp res ReadByteArrayOp_Int8 args = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args
363 emitPrimOp res ReadByteArrayOp_Int16 args = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args
364 emitPrimOp res ReadByteArrayOp_Int32 args = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args
365 emitPrimOp res ReadByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
366 emitPrimOp res ReadByteArrayOp_Word8 args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
367 emitPrimOp res ReadByteArrayOp_Word16 args = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args
368 emitPrimOp res ReadByteArrayOp_Word32 args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
369 emitPrimOp res ReadByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
373 emitPrimOp res WriteOffAddrOp_Char args = doWriteOffAddrOp (Just mo_WordTo8) res args
374 emitPrimOp res WriteOffAddrOp_WideChar args = doWriteOffAddrOp (Just mo_WordTo32) res args
375 emitPrimOp res WriteOffAddrOp_Int args = doWriteOffAddrOp Nothing res args
376 emitPrimOp res WriteOffAddrOp_Word args = doWriteOffAddrOp Nothing res args
377 emitPrimOp res WriteOffAddrOp_Addr args = doWriteOffAddrOp Nothing res args
378 emitPrimOp res WriteOffAddrOp_Float args = doWriteOffAddrOp Nothing res args
379 emitPrimOp res WriteOffAddrOp_Double args = doWriteOffAddrOp Nothing res args
380 emitPrimOp res WriteOffAddrOp_StablePtr args = doWriteOffAddrOp Nothing res args
381 emitPrimOp res WriteOffAddrOp_Int8 args = doWriteOffAddrOp (Just mo_WordTo8) res args
382 emitPrimOp res WriteOffAddrOp_Int16 args = doWriteOffAddrOp (Just mo_WordTo16) res args
383 emitPrimOp res WriteOffAddrOp_Int32 args = doWriteOffAddrOp (Just mo_WordTo32) res args
384 emitPrimOp res WriteOffAddrOp_Int64 args = doWriteOffAddrOp Nothing res args
385 emitPrimOp res WriteOffAddrOp_Word8 args = doWriteOffAddrOp (Just mo_WordTo8) res args
386 emitPrimOp res WriteOffAddrOp_Word16 args = doWriteOffAddrOp (Just mo_WordTo16) res args
387 emitPrimOp res WriteOffAddrOp_Word32 args = doWriteOffAddrOp (Just mo_WordTo32) res args
388 emitPrimOp res WriteOffAddrOp_Word64 args = doWriteOffAddrOp Nothing res args
392 emitPrimOp res WriteByteArrayOp_Char args = doWriteByteArrayOp (Just mo_WordTo8) res args
393 emitPrimOp res WriteByteArrayOp_WideChar args = doWriteByteArrayOp (Just mo_WordTo32) res args
394 emitPrimOp res WriteByteArrayOp_Int args = doWriteByteArrayOp Nothing res args
395 emitPrimOp res WriteByteArrayOp_Word args = doWriteByteArrayOp Nothing res args
396 emitPrimOp res WriteByteArrayOp_Addr args = doWriteByteArrayOp Nothing res args
397 emitPrimOp res WriteByteArrayOp_Float args = doWriteByteArrayOp Nothing res args
398 emitPrimOp res WriteByteArrayOp_Double args = doWriteByteArrayOp Nothing res args
399 emitPrimOp res WriteByteArrayOp_StablePtr args = doWriteByteArrayOp Nothing res args
400 emitPrimOp res WriteByteArrayOp_Int8 args = doWriteByteArrayOp (Just mo_WordTo8) res args
401 emitPrimOp res WriteByteArrayOp_Int16 args = doWriteByteArrayOp (Just mo_WordTo16) res args
402 emitPrimOp res WriteByteArrayOp_Int32 args = doWriteByteArrayOp (Just mo_WordTo32) res args
403 emitPrimOp res WriteByteArrayOp_Int64 args = doWriteByteArrayOp Nothing res args
404 emitPrimOp res WriteByteArrayOp_Word8 args = doWriteByteArrayOp (Just mo_WordTo8) res args
405 emitPrimOp res WriteByteArrayOp_Word16 args = doWriteByteArrayOp (Just mo_WordTo16) res args
406 emitPrimOp res WriteByteArrayOp_Word32 args = doWriteByteArrayOp (Just mo_WordTo32) res args
407 emitPrimOp res WriteByteArrayOp_Word64 args = doWriteByteArrayOp Nothing res args
410 -- The rest just translate straightforwardly
411 emitPrimOp [res] op [arg]
413 = emit (mkAssign (CmmLocal res) arg)
415 | Just (mop,rep) <- narrowOp op
416 = emit (mkAssign (CmmLocal res) $
417 CmmMachOp (mop rep wordWidth) [CmmMachOp (mop wordWidth rep) [arg]])
419 emitPrimOp r@[res] op args
420 | Just prim <- callishOp op
421 = do emitPrimCall r prim args
423 | Just mop <- translateOp op
424 = let stmt = mkAssign (CmmLocal res) (CmmMachOp mop args) in
428 = pprPanic "emitPrimOp: can't translate PrimOp" (ppr op)
431 -- These PrimOps are NOPs in Cmm
433 nopOp :: PrimOp -> Bool
434 nopOp Int2WordOp = True
435 nopOp Word2IntOp = True
436 nopOp Int2AddrOp = True
437 nopOp Addr2IntOp = True
438 nopOp ChrOp = True -- Int# and Char# are rep'd the same
442 -- These PrimOps turn into double casts
444 narrowOp :: PrimOp -> Maybe (Width -> Width -> MachOp, Width)
445 narrowOp Narrow8IntOp = Just (MO_SS_Conv, W8)
446 narrowOp Narrow16IntOp = Just (MO_SS_Conv, W16)
447 narrowOp Narrow32IntOp = Just (MO_SS_Conv, W32)
448 narrowOp Narrow8WordOp = Just (MO_UU_Conv, W8)
449 narrowOp Narrow16WordOp = Just (MO_UU_Conv, W16)
450 narrowOp Narrow32WordOp = Just (MO_UU_Conv, W32)
453 -- Native word signless ops
455 translateOp :: PrimOp -> Maybe MachOp
456 translateOp IntAddOp = Just mo_wordAdd
457 translateOp IntSubOp = Just mo_wordSub
458 translateOp WordAddOp = Just mo_wordAdd
459 translateOp WordSubOp = Just mo_wordSub
460 translateOp AddrAddOp = Just mo_wordAdd
461 translateOp AddrSubOp = Just mo_wordSub
463 translateOp IntEqOp = Just mo_wordEq
464 translateOp IntNeOp = Just mo_wordNe
465 translateOp WordEqOp = Just mo_wordEq
466 translateOp WordNeOp = Just mo_wordNe
467 translateOp AddrEqOp = Just mo_wordEq
468 translateOp AddrNeOp = Just mo_wordNe
470 translateOp AndOp = Just mo_wordAnd
471 translateOp OrOp = Just mo_wordOr
472 translateOp XorOp = Just mo_wordXor
473 translateOp NotOp = Just mo_wordNot
474 translateOp SllOp = Just mo_wordShl
475 translateOp SrlOp = Just mo_wordUShr
477 translateOp AddrRemOp = Just mo_wordURem
479 -- Native word signed ops
481 translateOp IntMulOp = Just mo_wordMul
482 translateOp IntMulMayOfloOp = Just (MO_S_MulMayOflo wordWidth)
483 translateOp IntQuotOp = Just mo_wordSQuot
484 translateOp IntRemOp = Just mo_wordSRem
485 translateOp IntNegOp = Just mo_wordSNeg
488 translateOp IntGeOp = Just mo_wordSGe
489 translateOp IntLeOp = Just mo_wordSLe
490 translateOp IntGtOp = Just mo_wordSGt
491 translateOp IntLtOp = Just mo_wordSLt
493 translateOp ISllOp = Just mo_wordShl
494 translateOp ISraOp = Just mo_wordSShr
495 translateOp ISrlOp = Just mo_wordUShr
497 -- Native word unsigned ops
499 translateOp WordGeOp = Just mo_wordUGe
500 translateOp WordLeOp = Just mo_wordULe
501 translateOp WordGtOp = Just mo_wordUGt
502 translateOp WordLtOp = Just mo_wordULt
504 translateOp WordMulOp = Just mo_wordMul
505 translateOp WordQuotOp = Just mo_wordUQuot
506 translateOp WordRemOp = Just mo_wordURem
508 translateOp AddrGeOp = Just mo_wordUGe
509 translateOp AddrLeOp = Just mo_wordULe
510 translateOp AddrGtOp = Just mo_wordUGt
511 translateOp AddrLtOp = Just mo_wordULt
515 translateOp CharEqOp = Just (MO_Eq wordWidth)
516 translateOp CharNeOp = Just (MO_Ne wordWidth)
517 translateOp CharGeOp = Just (MO_U_Ge wordWidth)
518 translateOp CharLeOp = Just (MO_U_Le wordWidth)
519 translateOp CharGtOp = Just (MO_U_Gt wordWidth)
520 translateOp CharLtOp = Just (MO_U_Lt wordWidth)
524 translateOp DoubleEqOp = Just (MO_F_Eq W64)
525 translateOp DoubleNeOp = Just (MO_F_Ne W64)
526 translateOp DoubleGeOp = Just (MO_F_Ge W64)
527 translateOp DoubleLeOp = Just (MO_F_Le W64)
528 translateOp DoubleGtOp = Just (MO_F_Gt W64)
529 translateOp DoubleLtOp = Just (MO_F_Lt W64)
531 translateOp DoubleAddOp = Just (MO_F_Add W64)
532 translateOp DoubleSubOp = Just (MO_F_Sub W64)
533 translateOp DoubleMulOp = Just (MO_F_Mul W64)
534 translateOp DoubleDivOp = Just (MO_F_Quot W64)
535 translateOp DoubleNegOp = Just (MO_F_Neg W64)
539 translateOp FloatEqOp = Just (MO_F_Eq W32)
540 translateOp FloatNeOp = Just (MO_F_Ne W32)
541 translateOp FloatGeOp = Just (MO_F_Ge W32)
542 translateOp FloatLeOp = Just (MO_F_Le W32)
543 translateOp FloatGtOp = Just (MO_F_Gt W32)
544 translateOp FloatLtOp = Just (MO_F_Lt W32)
546 translateOp FloatAddOp = Just (MO_F_Add W32)
547 translateOp FloatSubOp = Just (MO_F_Sub W32)
548 translateOp FloatMulOp = Just (MO_F_Mul W32)
549 translateOp FloatDivOp = Just (MO_F_Quot W32)
550 translateOp FloatNegOp = Just (MO_F_Neg W32)
554 translateOp Int2DoubleOp = Just (MO_SF_Conv wordWidth W64)
555 translateOp Double2IntOp = Just (MO_FS_Conv W64 wordWidth)
557 translateOp Int2FloatOp = Just (MO_SF_Conv wordWidth W32)
558 translateOp Float2IntOp = Just (MO_FS_Conv W32 wordWidth)
560 translateOp Float2DoubleOp = Just (MO_FF_Conv W32 W64)
561 translateOp Double2FloatOp = Just (MO_FF_Conv W64 W32)
563 -- Word comparisons masquerading as more exotic things.
565 translateOp SameMutVarOp = Just mo_wordEq
566 translateOp SameMVarOp = Just mo_wordEq
567 translateOp SameMutableArrayOp = Just mo_wordEq
568 translateOp SameMutableByteArrayOp = Just mo_wordEq
569 translateOp SameTVarOp = Just mo_wordEq
570 translateOp EqStablePtrOp = Just mo_wordEq
572 translateOp _ = Nothing
574 -- These primops are implemented by CallishMachOps, because they sometimes
575 -- turn into foreign calls depending on the backend.
577 callishOp :: PrimOp -> Maybe CallishMachOp
578 callishOp DoublePowerOp = Just MO_F64_Pwr
579 callishOp DoubleSinOp = Just MO_F64_Sin
580 callishOp DoubleCosOp = Just MO_F64_Cos
581 callishOp DoubleTanOp = Just MO_F64_Tan
582 callishOp DoubleSinhOp = Just MO_F64_Sinh
583 callishOp DoubleCoshOp = Just MO_F64_Cosh
584 callishOp DoubleTanhOp = Just MO_F64_Tanh
585 callishOp DoubleAsinOp = Just MO_F64_Asin
586 callishOp DoubleAcosOp = Just MO_F64_Acos
587 callishOp DoubleAtanOp = Just MO_F64_Atan
588 callishOp DoubleLogOp = Just MO_F64_Log
589 callishOp DoubleExpOp = Just MO_F64_Exp
590 callishOp DoubleSqrtOp = Just MO_F64_Sqrt
592 callishOp FloatPowerOp = Just MO_F32_Pwr
593 callishOp FloatSinOp = Just MO_F32_Sin
594 callishOp FloatCosOp = Just MO_F32_Cos
595 callishOp FloatTanOp = Just MO_F32_Tan
596 callishOp FloatSinhOp = Just MO_F32_Sinh
597 callishOp FloatCoshOp = Just MO_F32_Cosh
598 callishOp FloatTanhOp = Just MO_F32_Tanh
599 callishOp FloatAsinOp = Just MO_F32_Asin
600 callishOp FloatAcosOp = Just MO_F32_Acos
601 callishOp FloatAtanOp = Just MO_F32_Atan
602 callishOp FloatLogOp = Just MO_F32_Log
603 callishOp FloatExpOp = Just MO_F32_Exp
604 callishOp FloatSqrtOp = Just MO_F32_Sqrt
606 callishOp _ = Nothing
608 ------------------------------------------------------------------------------
609 -- Helpers for translating various minor variants of array indexing.
611 doIndexOffAddrOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> FCode ()
612 doIndexOffAddrOp maybe_post_read_cast rep [res] [addr,idx]
613 = mkBasicIndexedRead 0 maybe_post_read_cast rep res addr idx
614 doIndexOffAddrOp _ _ _ _
615 = panic "CgPrimOp: doIndexOffAddrOp"
617 doIndexByteArrayOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> FCode ()
618 doIndexByteArrayOp maybe_post_read_cast rep [res] [addr,idx]
619 = mkBasicIndexedRead arrWordsHdrSize maybe_post_read_cast rep res addr idx
620 doIndexByteArrayOp _ _ _ _
621 = panic "CgPrimOp: doIndexByteArrayOp"
623 doReadPtrArrayOp :: LocalReg -> CmmExpr -> CmmExpr -> FCode ()
624 doReadPtrArrayOp res addr idx
625 = mkBasicIndexedRead arrPtrsHdrSize Nothing gcWord res addr idx
628 doWriteOffAddrOp :: Maybe MachOp -> [LocalReg] -> [CmmExpr] -> FCode ()
629 doWriteOffAddrOp maybe_pre_write_cast [] [addr,idx,val]
630 = mkBasicIndexedWrite 0 maybe_pre_write_cast addr idx val
631 doWriteOffAddrOp _ _ _
632 = panic "CgPrimOp: doWriteOffAddrOp"
634 doWriteByteArrayOp :: Maybe MachOp -> [LocalReg] -> [CmmExpr] -> FCode ()
635 doWriteByteArrayOp maybe_pre_write_cast [] [addr,idx,val]
636 = mkBasicIndexedWrite arrWordsHdrSize maybe_pre_write_cast addr idx val
637 doWriteByteArrayOp _ _ _
638 = panic "CgPrimOp: doWriteByteArrayOp"
640 doWritePtrArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> FCode ()
641 doWritePtrArrayOp addr idx val
642 = do mkBasicIndexedWrite arrPtrsHdrSize Nothing addr idx val
643 emit (setInfo addr (CmmLit (CmmLabel mkMAP_DIRTY_infoLabel)))
644 -- the write barrier. We must write a byte into the mark table:
645 -- bits8[a + header_size + StgMutArrPtrs_size(a) + x >> N]
648 (cmmOffsetExprW (cmmOffsetB addr arrPtrsHdrSize)
649 (loadArrPtrsSize addr))
650 (CmmMachOp mo_wordUShr [idx,
651 CmmLit (mkIntCLit mUT_ARR_PTRS_CARD_BITS)])
652 ) (CmmLit (CmmInt 1 W8))
654 loadArrPtrsSize :: CmmExpr -> CmmExpr
655 loadArrPtrsSize addr = CmmLoad (cmmOffsetB addr off) bWord
656 where off = fixedHdrSize*wORD_SIZE + oFFSET_StgMutArrPtrs_ptrs
658 mkBasicIndexedRead :: ByteOff -> Maybe MachOp -> CmmType
659 -> LocalReg -> CmmExpr -> CmmExpr -> FCode ()
660 mkBasicIndexedRead off Nothing read_rep res base idx
661 = emit (mkAssign (CmmLocal res) (cmmLoadIndexOffExpr off read_rep base idx))
662 mkBasicIndexedRead off (Just cast) read_rep res base idx
663 = emit (mkAssign (CmmLocal res) (CmmMachOp cast [
664 cmmLoadIndexOffExpr off read_rep base idx]))
666 mkBasicIndexedWrite :: ByteOff -> Maybe MachOp
667 -> CmmExpr -> CmmExpr -> CmmExpr -> FCode ()
668 mkBasicIndexedWrite off Nothing base idx val
669 = emit (mkStore (cmmIndexOffExpr off (typeWidth (cmmExprType val)) base idx) val)
670 mkBasicIndexedWrite off (Just cast) base idx val
671 = mkBasicIndexedWrite off Nothing base idx (CmmMachOp cast [val])
673 -- ----------------------------------------------------------------------------
676 cmmIndexOffExpr :: ByteOff -> Width -> CmmExpr -> CmmExpr -> CmmExpr
677 cmmIndexOffExpr off width base idx
678 = cmmIndexExpr width (cmmOffsetB base off) idx
680 cmmLoadIndexOffExpr :: ByteOff -> CmmType -> CmmExpr -> CmmExpr -> CmmExpr
681 cmmLoadIndexOffExpr off ty base idx
682 = CmmLoad (cmmIndexOffExpr off (typeWidth ty) base idx) ty
684 setInfo :: CmmExpr -> CmmExpr -> CmmAGraph
685 setInfo closure_ptr info_ptr = mkStore closure_ptr info_ptr