1 -----------------------------------------------------------------------------
3 -- Stg to C--: primitive operations
5 -- (c) The University of Glasgow 2004-2006
7 -----------------------------------------------------------------------------
13 #include "HsVersions.h"
24 import Type ( Type, tyConAppTyCon )
35 ------------------------------------------------------------------------
36 -- Primitive operations and foreign calls
37 ------------------------------------------------------------------------
39 {- Note [Foreign call results]
40 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
41 A foreign call always returns an unboxed tuple of results, one
42 of which is the state token. This seems to happen even for pure
45 Even if we returned a single result for pure calls, it'd still be
46 right to wrap it in a singleton unboxed tuple, because the result
47 might be a Haskell closure pointer, we don't want to evaluate it. -}
49 ----------------------------------
50 cgOpApp :: StgOp -- The op
51 -> [StgArg] -- Arguments
52 -> Type -- Result type (always an unboxed tuple)
56 cgOpApp (StgFCallOp fcall _) stg_args res_ty
57 = do { (res_regs, res_hints) <- newUnboxedTupleRegs res_ty
58 -- Choose result regs r1, r2
59 -- Note [Foreign call results]
60 ; cgForeignCall res_regs res_hints fcall stg_args
61 -- r1, r2 = foo( x, y )
62 ; emitReturn (map (CmmReg . CmmLocal) res_regs) }
65 -- tagToEnum# is special: we need to pull the constructor
66 -- out of the table, and perform an appropriate return.
68 cgOpApp (StgPrimOp TagToEnumOp) [arg] res_ty
69 = ASSERT(isEnumerationTyCon tycon)
70 do { args' <- getNonVoidArgAmodes [arg]
71 ; let amode = case args' of [amode] -> amode
72 _ -> panic "TagToEnumOp had void arg"
73 ; emitReturn [tagToClosure tycon amode] }
75 -- If you're reading this code in the attempt to figure
76 -- out why the compiler panic'ed here, it is probably because
77 -- you used tagToEnum# in a non-monomorphic setting, e.g.,
78 -- intToTg :: Enum a => Int -> a ; intToTg (I# x#) = tagToEnum# x#
80 tycon = tyConAppTyCon res_ty
82 cgOpApp (StgPrimOp primop) args res_ty
83 | primOpOutOfLine primop
84 = do { cmm_args <- getNonVoidArgAmodes args
85 ; let fun = CmmLit (CmmLabel (mkRtsPrimOpLabel primop))
86 ; emitCall (PrimOpCall, PrimOpReturn) fun cmm_args }
88 | ReturnsPrim VoidRep <- result_info
89 = do cgPrimOp [] primop args
92 | ReturnsPrim rep <- result_info
93 = do res <- newTemp (primRepCmmType rep)
94 cgPrimOp [res] primop args
95 emitReturn [CmmReg (CmmLocal res)]
97 | ReturnsAlg tycon <- result_info, isUnboxedTupleTyCon tycon
98 = do (regs, _hints) <- newUnboxedTupleRegs res_ty
99 cgPrimOp regs primop args
100 emitReturn (map (CmmReg . CmmLocal) regs)
102 | ReturnsAlg tycon <- result_info
103 , isEnumerationTyCon tycon
104 -- c.f. cgExpr (...TagToEnumOp...)
105 = do tag_reg <- newTemp bWord
106 cgPrimOp [tag_reg] primop args
107 emitReturn [tagToClosure tycon
108 (CmmReg (CmmLocal tag_reg))]
110 | otherwise = panic "cgPrimop"
112 result_info = getPrimOpResultInfo primop
114 cgOpApp (StgPrimCallOp primcall) args _res_ty
115 = do { cmm_args <- getNonVoidArgAmodes args
116 ; let fun = CmmLit (CmmLabel (mkPrimCallLabel primcall))
117 ; emitCall (PrimOpCall, PrimOpReturn) fun cmm_args }
119 ---------------------------------------------------
120 cgPrimOp :: [LocalReg] -- where to put the results
122 -> [StgArg] -- arguments
125 cgPrimOp results op args
126 = do arg_exprs <- getNonVoidArgAmodes args
127 emitPrimOp results op arg_exprs
130 ------------------------------------------------------------------------
131 -- Emitting code for a primop
132 ------------------------------------------------------------------------
134 emitPrimOp :: [LocalReg] -- where to put the results
136 -> [CmmExpr] -- arguments
139 -- First we handle various awkward cases specially. The remaining
140 -- easy cases are then handled by translateOp, defined below.
142 emitPrimOp [res_r,res_c] IntAddCOp [aa,bb]
144 With some bit-twiddling, we can define int{Add,Sub}Czh portably in
145 C, and without needing any comparisons. This may not be the
146 fastest way to do it - if you have better code, please send it! --SDM
148 Return : r = a + b, c = 0 if no overflow, 1 on overflow.
150 We currently don't make use of the r value if c is != 0 (i.e.
151 overflow), we just convert to big integers and try again. This
152 could be improved by making r and c the correct values for
153 plugging into a new J#.
155 { r = ((I_)(a)) + ((I_)(b)); \
156 c = ((StgWord)(~(((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \
157 >> (BITS_IN (I_) - 1); \
159 Wading through the mass of bracketry, it seems to reduce to:
160 c = ( (~(a^b)) & (a^r) ) >>unsigned (BITS_IN(I_)-1)
163 = emit $ catAGraphs [
164 mkAssign (CmmLocal res_r) (CmmMachOp mo_wordAdd [aa,bb]),
165 mkAssign (CmmLocal res_c) $
166 CmmMachOp mo_wordUShr [
167 CmmMachOp mo_wordAnd [
168 CmmMachOp mo_wordNot [CmmMachOp mo_wordXor [aa,bb]],
169 CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)]
171 CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1))
176 emitPrimOp [res_r,res_c] IntSubCOp [aa,bb]
178 #define subIntCzh(r,c,a,b) \
179 { r = ((I_)(a)) - ((I_)(b)); \
180 c = ((StgWord)((((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \
181 >> (BITS_IN (I_) - 1); \
184 c = ((a^b) & (a^r)) >>unsigned (BITS_IN(I_)-1)
186 = emit $ catAGraphs [
187 mkAssign (CmmLocal res_r) (CmmMachOp mo_wordSub [aa,bb]),
188 mkAssign (CmmLocal res_c) $
189 CmmMachOp mo_wordUShr [
190 CmmMachOp mo_wordAnd [
191 CmmMachOp mo_wordXor [aa,bb],
192 CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)]
194 CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1))
199 emitPrimOp [res] ParOp [arg]
201 -- for now, just implement this in a C function
202 -- later, we might want to inline it.
205 (CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "newSpark"))))
206 [(CmmReg (CmmGlobal BaseReg), AddrHint), (arg,AddrHint)]
208 emitPrimOp [res] ReadMutVarOp [mutv]
209 = emit (mkAssign (CmmLocal res) (cmmLoadIndexW mutv fixedHdrSize gcWord))
211 emitPrimOp [] WriteMutVarOp [mutv,var]
213 emit (mkStore (cmmOffsetW mutv fixedHdrSize) var)
216 (CmmLit (CmmLabel mkDirty_MUT_VAR_Label))
217 [(CmmReg (CmmGlobal BaseReg), AddrHint), (mutv,AddrHint)]
219 -- #define sizzeofByteArrayzh(r,a) \
220 -- r = ((StgArrWords *)(a))->bytes
221 emitPrimOp [res] SizeofByteArrayOp [arg]
223 mkAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord)
225 -- #define sizzeofMutableByteArrayzh(r,a) \
226 -- r = ((StgArrWords *)(a))->bytes
227 emitPrimOp [res] SizeofMutableByteArrayOp [arg]
228 = emitPrimOp [res] SizeofByteArrayOp [arg]
231 -- #define touchzh(o) /* nothing */
232 emitPrimOp res@[] TouchOp args@[_arg]
233 = do emitPrimCall res MO_Touch args
235 -- #define byteArrayContentszh(r,a) r = BYTE_ARR_CTS(a)
236 emitPrimOp [res] ByteArrayContents_Char [arg]
237 = emit (mkAssign (CmmLocal res) (cmmOffsetB arg arrWordsHdrSize))
239 -- #define stableNameToIntzh(r,s) (r = ((StgStableName *)s)->sn)
240 emitPrimOp [res] StableNameToIntOp [arg]
241 = emit (mkAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord))
243 -- #define eqStableNamezh(r,sn1,sn2) \
244 -- (r = (((StgStableName *)sn1)->sn == ((StgStableName *)sn2)->sn))
245 emitPrimOp [res] EqStableNameOp [arg1,arg2]
246 = emit (mkAssign (CmmLocal res) (CmmMachOp mo_wordEq [
247 cmmLoadIndexW arg1 fixedHdrSize bWord,
248 cmmLoadIndexW arg2 fixedHdrSize bWord
252 emitPrimOp [res] ReallyUnsafePtrEqualityOp [arg1,arg2]
253 = emit (mkAssign (CmmLocal res) (CmmMachOp mo_wordEq [arg1,arg2]))
255 -- #define addrToHValuezh(r,a) r=(P_)a
256 emitPrimOp [res] AddrToHValueOp [arg]
257 = emit (mkAssign (CmmLocal res) arg)
259 -- #define dataToTagzh(r,a) r=(GET_TAG(((StgClosure *)a)->header.info))
260 -- Note: argument may be tagged!
261 emitPrimOp [res] DataToTagOp [arg]
262 = emit (mkAssign (CmmLocal res) (getConstrTag (cmmUntag arg)))
264 {- Freezing arrays-of-ptrs requires changing an info table, for the
265 benefit of the generational collector. It needs to scavenge mutable
266 objects, even if they are in old space. When they become immutable,
267 they can be removed from this scavenge list. -}
269 -- #define unsafeFreezzeArrayzh(r,a)
271 -- SET_INFO((StgClosure *)a,&stg_MUT_ARR_PTRS_FROZEN0_info);
274 emitPrimOp [res] UnsafeFreezeArrayOp [arg]
276 [ setInfo arg (CmmLit (CmmLabel mkMAP_FROZEN_infoLabel)),
277 mkAssign (CmmLocal res) arg ]
279 -- #define unsafeFreezzeByteArrayzh(r,a) r=(a)
280 emitPrimOp [res] UnsafeFreezeByteArrayOp [arg]
281 = emit (mkAssign (CmmLocal res) arg)
283 -- Reading/writing pointer arrays
285 emitPrimOp [r] ReadArrayOp [obj,ix] = doReadPtrArrayOp r obj ix
286 emitPrimOp [r] IndexArrayOp [obj,ix] = doReadPtrArrayOp r obj ix
287 emitPrimOp [] WriteArrayOp [obj,ix,v] = doWritePtrArrayOp obj ix v
291 emitPrimOp res IndexOffAddrOp_Char args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
292 emitPrimOp res IndexOffAddrOp_WideChar args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
293 emitPrimOp res IndexOffAddrOp_Int args = doIndexOffAddrOp Nothing bWord res args
294 emitPrimOp res IndexOffAddrOp_Word args = doIndexOffAddrOp Nothing bWord res args
295 emitPrimOp res IndexOffAddrOp_Addr args = doIndexOffAddrOp Nothing bWord res args
296 emitPrimOp res IndexOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
297 emitPrimOp res IndexOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
298 emitPrimOp res IndexOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing bWord res args
299 emitPrimOp res IndexOffAddrOp_Int8 args = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args
300 emitPrimOp res IndexOffAddrOp_Int16 args = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args
301 emitPrimOp res IndexOffAddrOp_Int32 args = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args
302 emitPrimOp res IndexOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
303 emitPrimOp res IndexOffAddrOp_Word8 args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
304 emitPrimOp res IndexOffAddrOp_Word16 args = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args
305 emitPrimOp res IndexOffAddrOp_Word32 args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
306 emitPrimOp res IndexOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
308 -- ReadXXXoffAddr, which are identical, for our purposes, to IndexXXXoffAddr.
310 emitPrimOp res ReadOffAddrOp_Char args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
311 emitPrimOp res ReadOffAddrOp_WideChar args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
312 emitPrimOp res ReadOffAddrOp_Int args = doIndexOffAddrOp Nothing bWord res args
313 emitPrimOp res ReadOffAddrOp_Word args = doIndexOffAddrOp Nothing bWord res args
314 emitPrimOp res ReadOffAddrOp_Addr args = doIndexOffAddrOp Nothing bWord res args
315 emitPrimOp res ReadOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
316 emitPrimOp res ReadOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
317 emitPrimOp res ReadOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing bWord res args
318 emitPrimOp res ReadOffAddrOp_Int8 args = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args
319 emitPrimOp res ReadOffAddrOp_Int16 args = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args
320 emitPrimOp res ReadOffAddrOp_Int32 args = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args
321 emitPrimOp res ReadOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
322 emitPrimOp res ReadOffAddrOp_Word8 args = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args
323 emitPrimOp res ReadOffAddrOp_Word16 args = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args
324 emitPrimOp res ReadOffAddrOp_Word32 args = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args
325 emitPrimOp res ReadOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
329 emitPrimOp res IndexByteArrayOp_Char args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
330 emitPrimOp res IndexByteArrayOp_WideChar args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
331 emitPrimOp res IndexByteArrayOp_Int args = doIndexByteArrayOp Nothing bWord res args
332 emitPrimOp res IndexByteArrayOp_Word args = doIndexByteArrayOp Nothing bWord res args
333 emitPrimOp res IndexByteArrayOp_Addr args = doIndexByteArrayOp Nothing bWord res args
334 emitPrimOp res IndexByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
335 emitPrimOp res IndexByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
336 emitPrimOp res IndexByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing bWord res args
337 emitPrimOp res IndexByteArrayOp_Int8 args = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args
338 emitPrimOp res IndexByteArrayOp_Int16 args = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args
339 emitPrimOp res IndexByteArrayOp_Int32 args = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args
340 emitPrimOp res IndexByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
341 emitPrimOp res IndexByteArrayOp_Word8 args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
342 emitPrimOp res IndexByteArrayOp_Word16 args = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args
343 emitPrimOp res IndexByteArrayOp_Word32 args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
344 emitPrimOp res IndexByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
346 -- ReadXXXArray, identical to IndexXXXArray.
348 emitPrimOp res ReadByteArrayOp_Char args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
349 emitPrimOp res ReadByteArrayOp_WideChar args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
350 emitPrimOp res ReadByteArrayOp_Int args = doIndexByteArrayOp Nothing bWord res args
351 emitPrimOp res ReadByteArrayOp_Word args = doIndexByteArrayOp Nothing bWord res args
352 emitPrimOp res ReadByteArrayOp_Addr args = doIndexByteArrayOp Nothing bWord res args
353 emitPrimOp res ReadByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
354 emitPrimOp res ReadByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
355 emitPrimOp res ReadByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing bWord res args
356 emitPrimOp res ReadByteArrayOp_Int8 args = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args
357 emitPrimOp res ReadByteArrayOp_Int16 args = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args
358 emitPrimOp res ReadByteArrayOp_Int32 args = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args
359 emitPrimOp res ReadByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
360 emitPrimOp res ReadByteArrayOp_Word8 args = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args
361 emitPrimOp res ReadByteArrayOp_Word16 args = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args
362 emitPrimOp res ReadByteArrayOp_Word32 args = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args
363 emitPrimOp res ReadByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
367 emitPrimOp res WriteOffAddrOp_Char args = doWriteOffAddrOp (Just mo_WordTo8) res args
368 emitPrimOp res WriteOffAddrOp_WideChar args = doWriteOffAddrOp (Just mo_WordTo32) res args
369 emitPrimOp res WriteOffAddrOp_Int args = doWriteOffAddrOp Nothing res args
370 emitPrimOp res WriteOffAddrOp_Word args = doWriteOffAddrOp Nothing res args
371 emitPrimOp res WriteOffAddrOp_Addr args = doWriteOffAddrOp Nothing res args
372 emitPrimOp res WriteOffAddrOp_Float args = doWriteOffAddrOp Nothing res args
373 emitPrimOp res WriteOffAddrOp_Double args = doWriteOffAddrOp Nothing res args
374 emitPrimOp res WriteOffAddrOp_StablePtr args = doWriteOffAddrOp Nothing res args
375 emitPrimOp res WriteOffAddrOp_Int8 args = doWriteOffAddrOp (Just mo_WordTo8) res args
376 emitPrimOp res WriteOffAddrOp_Int16 args = doWriteOffAddrOp (Just mo_WordTo16) res args
377 emitPrimOp res WriteOffAddrOp_Int32 args = doWriteOffAddrOp (Just mo_WordTo32) res args
378 emitPrimOp res WriteOffAddrOp_Int64 args = doWriteOffAddrOp Nothing res args
379 emitPrimOp res WriteOffAddrOp_Word8 args = doWriteOffAddrOp (Just mo_WordTo8) res args
380 emitPrimOp res WriteOffAddrOp_Word16 args = doWriteOffAddrOp (Just mo_WordTo16) res args
381 emitPrimOp res WriteOffAddrOp_Word32 args = doWriteOffAddrOp (Just mo_WordTo32) res args
382 emitPrimOp res WriteOffAddrOp_Word64 args = doWriteOffAddrOp Nothing res args
386 emitPrimOp res WriteByteArrayOp_Char args = doWriteByteArrayOp (Just mo_WordTo8) res args
387 emitPrimOp res WriteByteArrayOp_WideChar args = doWriteByteArrayOp (Just mo_WordTo32) res args
388 emitPrimOp res WriteByteArrayOp_Int args = doWriteByteArrayOp Nothing res args
389 emitPrimOp res WriteByteArrayOp_Word args = doWriteByteArrayOp Nothing res args
390 emitPrimOp res WriteByteArrayOp_Addr args = doWriteByteArrayOp Nothing res args
391 emitPrimOp res WriteByteArrayOp_Float args = doWriteByteArrayOp Nothing res args
392 emitPrimOp res WriteByteArrayOp_Double args = doWriteByteArrayOp Nothing res args
393 emitPrimOp res WriteByteArrayOp_StablePtr args = doWriteByteArrayOp Nothing res args
394 emitPrimOp res WriteByteArrayOp_Int8 args = doWriteByteArrayOp (Just mo_WordTo8) res args
395 emitPrimOp res WriteByteArrayOp_Int16 args = doWriteByteArrayOp (Just mo_WordTo16) res args
396 emitPrimOp res WriteByteArrayOp_Int32 args = doWriteByteArrayOp (Just mo_WordTo32) res args
397 emitPrimOp res WriteByteArrayOp_Int64 args = doWriteByteArrayOp Nothing res args
398 emitPrimOp res WriteByteArrayOp_Word8 args = doWriteByteArrayOp (Just mo_WordTo8) res args
399 emitPrimOp res WriteByteArrayOp_Word16 args = doWriteByteArrayOp (Just mo_WordTo16) res args
400 emitPrimOp res WriteByteArrayOp_Word32 args = doWriteByteArrayOp (Just mo_WordTo32) res args
401 emitPrimOp res WriteByteArrayOp_Word64 args = doWriteByteArrayOp Nothing res args
404 -- The rest just translate straightforwardly
405 emitPrimOp [res] op [arg]
407 = emit (mkAssign (CmmLocal res) arg)
409 | Just (mop,rep) <- narrowOp op
410 = emit (mkAssign (CmmLocal res) $
411 CmmMachOp (mop rep wordWidth) [CmmMachOp (mop wordWidth rep) [arg]])
413 emitPrimOp r@[res] op args
414 | Just prim <- callishOp op
415 = do emitPrimCall r prim args
417 | Just mop <- translateOp op
418 = let stmt = mkAssign (CmmLocal res) (CmmMachOp mop args) in
422 = pprPanic "emitPrimOp: can't translate PrimOp" (ppr op)
425 -- These PrimOps are NOPs in Cmm
427 nopOp :: PrimOp -> Bool
428 nopOp Int2WordOp = True
429 nopOp Word2IntOp = True
430 nopOp Int2AddrOp = True
431 nopOp Addr2IntOp = True
432 nopOp ChrOp = True -- Int# and Char# are rep'd the same
436 -- These PrimOps turn into double casts
438 narrowOp :: PrimOp -> Maybe (Width -> Width -> MachOp, Width)
439 narrowOp Narrow8IntOp = Just (MO_SS_Conv, W8)
440 narrowOp Narrow16IntOp = Just (MO_SS_Conv, W16)
441 narrowOp Narrow32IntOp = Just (MO_SS_Conv, W32)
442 narrowOp Narrow8WordOp = Just (MO_UU_Conv, W8)
443 narrowOp Narrow16WordOp = Just (MO_UU_Conv, W16)
444 narrowOp Narrow32WordOp = Just (MO_UU_Conv, W32)
447 -- Native word signless ops
449 translateOp :: PrimOp -> Maybe MachOp
450 translateOp IntAddOp = Just mo_wordAdd
451 translateOp IntSubOp = Just mo_wordSub
452 translateOp WordAddOp = Just mo_wordAdd
453 translateOp WordSubOp = Just mo_wordSub
454 translateOp AddrAddOp = Just mo_wordAdd
455 translateOp AddrSubOp = Just mo_wordSub
457 translateOp IntEqOp = Just mo_wordEq
458 translateOp IntNeOp = Just mo_wordNe
459 translateOp WordEqOp = Just mo_wordEq
460 translateOp WordNeOp = Just mo_wordNe
461 translateOp AddrEqOp = Just mo_wordEq
462 translateOp AddrNeOp = Just mo_wordNe
464 translateOp AndOp = Just mo_wordAnd
465 translateOp OrOp = Just mo_wordOr
466 translateOp XorOp = Just mo_wordXor
467 translateOp NotOp = Just mo_wordNot
468 translateOp SllOp = Just mo_wordShl
469 translateOp SrlOp = Just mo_wordUShr
471 translateOp AddrRemOp = Just mo_wordURem
473 -- Native word signed ops
475 translateOp IntMulOp = Just mo_wordMul
476 translateOp IntMulMayOfloOp = Just (MO_S_MulMayOflo wordWidth)
477 translateOp IntQuotOp = Just mo_wordSQuot
478 translateOp IntRemOp = Just mo_wordSRem
479 translateOp IntNegOp = Just mo_wordSNeg
482 translateOp IntGeOp = Just mo_wordSGe
483 translateOp IntLeOp = Just mo_wordSLe
484 translateOp IntGtOp = Just mo_wordSGt
485 translateOp IntLtOp = Just mo_wordSLt
487 translateOp ISllOp = Just mo_wordShl
488 translateOp ISraOp = Just mo_wordSShr
489 translateOp ISrlOp = Just mo_wordUShr
491 -- Native word unsigned ops
493 translateOp WordGeOp = Just mo_wordUGe
494 translateOp WordLeOp = Just mo_wordULe
495 translateOp WordGtOp = Just mo_wordUGt
496 translateOp WordLtOp = Just mo_wordULt
498 translateOp WordMulOp = Just mo_wordMul
499 translateOp WordQuotOp = Just mo_wordUQuot
500 translateOp WordRemOp = Just mo_wordURem
502 translateOp AddrGeOp = Just mo_wordUGe
503 translateOp AddrLeOp = Just mo_wordULe
504 translateOp AddrGtOp = Just mo_wordUGt
505 translateOp AddrLtOp = Just mo_wordULt
509 translateOp CharEqOp = Just (MO_Eq wordWidth)
510 translateOp CharNeOp = Just (MO_Ne wordWidth)
511 translateOp CharGeOp = Just (MO_U_Ge wordWidth)
512 translateOp CharLeOp = Just (MO_U_Le wordWidth)
513 translateOp CharGtOp = Just (MO_U_Gt wordWidth)
514 translateOp CharLtOp = Just (MO_U_Lt wordWidth)
518 translateOp DoubleEqOp = Just (MO_F_Eq W64)
519 translateOp DoubleNeOp = Just (MO_F_Ne W64)
520 translateOp DoubleGeOp = Just (MO_F_Ge W64)
521 translateOp DoubleLeOp = Just (MO_F_Le W64)
522 translateOp DoubleGtOp = Just (MO_F_Gt W64)
523 translateOp DoubleLtOp = Just (MO_F_Lt W64)
525 translateOp DoubleAddOp = Just (MO_F_Add W64)
526 translateOp DoubleSubOp = Just (MO_F_Sub W64)
527 translateOp DoubleMulOp = Just (MO_F_Mul W64)
528 translateOp DoubleDivOp = Just (MO_F_Quot W64)
529 translateOp DoubleNegOp = Just (MO_F_Neg W64)
533 translateOp FloatEqOp = Just (MO_F_Eq W32)
534 translateOp FloatNeOp = Just (MO_F_Ne W32)
535 translateOp FloatGeOp = Just (MO_F_Ge W32)
536 translateOp FloatLeOp = Just (MO_F_Le W32)
537 translateOp FloatGtOp = Just (MO_F_Gt W32)
538 translateOp FloatLtOp = Just (MO_F_Lt W32)
540 translateOp FloatAddOp = Just (MO_F_Add W32)
541 translateOp FloatSubOp = Just (MO_F_Sub W32)
542 translateOp FloatMulOp = Just (MO_F_Mul W32)
543 translateOp FloatDivOp = Just (MO_F_Quot W32)
544 translateOp FloatNegOp = Just (MO_F_Neg W32)
548 translateOp Int2DoubleOp = Just (MO_SF_Conv wordWidth W64)
549 translateOp Double2IntOp = Just (MO_FS_Conv W64 wordWidth)
551 translateOp Int2FloatOp = Just (MO_SF_Conv wordWidth W32)
552 translateOp Float2IntOp = Just (MO_FS_Conv W32 wordWidth)
554 translateOp Float2DoubleOp = Just (MO_FF_Conv W32 W64)
555 translateOp Double2FloatOp = Just (MO_FF_Conv W64 W32)
557 -- Word comparisons masquerading as more exotic things.
559 translateOp SameMutVarOp = Just mo_wordEq
560 translateOp SameMVarOp = Just mo_wordEq
561 translateOp SameMutableArrayOp = Just mo_wordEq
562 translateOp SameMutableByteArrayOp = Just mo_wordEq
563 translateOp SameTVarOp = Just mo_wordEq
564 translateOp EqStablePtrOp = Just mo_wordEq
566 translateOp _ = Nothing
568 -- These primops are implemented by CallishMachOps, because they sometimes
569 -- turn into foreign calls depending on the backend.
571 callishOp :: PrimOp -> Maybe CallishMachOp
572 callishOp DoublePowerOp = Just MO_F64_Pwr
573 callishOp DoubleSinOp = Just MO_F64_Sin
574 callishOp DoubleCosOp = Just MO_F64_Cos
575 callishOp DoubleTanOp = Just MO_F64_Tan
576 callishOp DoubleSinhOp = Just MO_F64_Sinh
577 callishOp DoubleCoshOp = Just MO_F64_Cosh
578 callishOp DoubleTanhOp = Just MO_F64_Tanh
579 callishOp DoubleAsinOp = Just MO_F64_Asin
580 callishOp DoubleAcosOp = Just MO_F64_Acos
581 callishOp DoubleAtanOp = Just MO_F64_Atan
582 callishOp DoubleLogOp = Just MO_F64_Log
583 callishOp DoubleExpOp = Just MO_F64_Exp
584 callishOp DoubleSqrtOp = Just MO_F64_Sqrt
586 callishOp FloatPowerOp = Just MO_F32_Pwr
587 callishOp FloatSinOp = Just MO_F32_Sin
588 callishOp FloatCosOp = Just MO_F32_Cos
589 callishOp FloatTanOp = Just MO_F32_Tan
590 callishOp FloatSinhOp = Just MO_F32_Sinh
591 callishOp FloatCoshOp = Just MO_F32_Cosh
592 callishOp FloatTanhOp = Just MO_F32_Tanh
593 callishOp FloatAsinOp = Just MO_F32_Asin
594 callishOp FloatAcosOp = Just MO_F32_Acos
595 callishOp FloatAtanOp = Just MO_F32_Atan
596 callishOp FloatLogOp = Just MO_F32_Log
597 callishOp FloatExpOp = Just MO_F32_Exp
598 callishOp FloatSqrtOp = Just MO_F32_Sqrt
600 callishOp _ = Nothing
602 ------------------------------------------------------------------------------
603 -- Helpers for translating various minor variants of array indexing.
605 doIndexOffAddrOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> FCode ()
606 doIndexOffAddrOp maybe_post_read_cast rep [res] [addr,idx]
607 = mkBasicIndexedRead 0 maybe_post_read_cast rep res addr idx
608 doIndexOffAddrOp _ _ _ _
609 = panic "CgPrimOp: doIndexOffAddrOp"
611 doIndexByteArrayOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> FCode ()
612 doIndexByteArrayOp maybe_post_read_cast rep [res] [addr,idx]
613 = mkBasicIndexedRead arrWordsHdrSize maybe_post_read_cast rep res addr idx
614 doIndexByteArrayOp _ _ _ _
615 = panic "CgPrimOp: doIndexByteArrayOp"
617 doReadPtrArrayOp :: LocalReg -> CmmExpr -> CmmExpr -> FCode ()
618 doReadPtrArrayOp res addr idx
619 = mkBasicIndexedRead arrPtrsHdrSize Nothing gcWord res addr idx
622 doWriteOffAddrOp :: Maybe MachOp -> [LocalReg] -> [CmmExpr] -> FCode ()
623 doWriteOffAddrOp maybe_pre_write_cast [] [addr,idx,val]
624 = mkBasicIndexedWrite 0 maybe_pre_write_cast addr idx val
625 doWriteOffAddrOp _ _ _
626 = panic "CgPrimOp: doWriteOffAddrOp"
628 doWriteByteArrayOp :: Maybe MachOp -> [LocalReg] -> [CmmExpr] -> FCode ()
629 doWriteByteArrayOp maybe_pre_write_cast [] [addr,idx,val]
630 = mkBasicIndexedWrite arrWordsHdrSize maybe_pre_write_cast addr idx val
631 doWriteByteArrayOp _ _ _
632 = panic "CgPrimOp: doWriteByteArrayOp"
634 doWritePtrArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> FCode ()
635 doWritePtrArrayOp addr idx val
636 = do mkBasicIndexedWrite arrPtrsHdrSize Nothing addr idx val
637 emit (setInfo addr (CmmLit (CmmLabel mkMAP_DIRTY_infoLabel)))
638 -- the write barrier. We must write a byte into the mark table:
639 -- bits8[a + header_size + StgMutArrPtrs_size(a) + x >> N]
642 (cmmOffsetExprW (cmmOffsetB addr arrPtrsHdrSize)
643 (loadArrPtrsSize addr))
644 (CmmMachOp mo_wordUShr [idx,
645 CmmLit (mkIntCLit mUT_ARR_PTRS_CARD_BITS)])
646 ) (CmmLit (CmmInt 1 W8))
648 loadArrPtrsSize :: CmmExpr -> CmmExpr
649 loadArrPtrsSize addr = CmmLoad (cmmOffsetB addr off) bWord
650 where off = fixedHdrSize*wORD_SIZE + oFFSET_StgMutArrPtrs_ptrs
652 mkBasicIndexedRead :: ByteOff -> Maybe MachOp -> CmmType
653 -> LocalReg -> CmmExpr -> CmmExpr -> FCode ()
654 mkBasicIndexedRead off Nothing read_rep res base idx
655 = emit (mkAssign (CmmLocal res) (cmmLoadIndexOffExpr off read_rep base idx))
656 mkBasicIndexedRead off (Just cast) read_rep res base idx
657 = emit (mkAssign (CmmLocal res) (CmmMachOp cast [
658 cmmLoadIndexOffExpr off read_rep base idx]))
660 mkBasicIndexedWrite :: ByteOff -> Maybe MachOp
661 -> CmmExpr -> CmmExpr -> CmmExpr -> FCode ()
662 mkBasicIndexedWrite off Nothing base idx val
663 = emit (mkStore (cmmIndexOffExpr off (typeWidth (cmmExprType val)) base idx) val)
664 mkBasicIndexedWrite off (Just cast) base idx val
665 = mkBasicIndexedWrite off Nothing base idx (CmmMachOp cast [val])
667 -- ----------------------------------------------------------------------------
670 cmmIndexOffExpr :: ByteOff -> Width -> CmmExpr -> CmmExpr -> CmmExpr
671 cmmIndexOffExpr off width base idx
672 = cmmIndexExpr width (cmmOffsetB base off) idx
674 cmmLoadIndexOffExpr :: ByteOff -> CmmType -> CmmExpr -> CmmExpr -> CmmExpr
675 cmmLoadIndexOffExpr off ty base idx
676 = CmmLoad (cmmIndexOffExpr off (typeWidth ty) base idx) ty
678 setInfo :: CmmExpr -> CmmExpr -> CmmAGraph
679 setInfo closure_ptr info_ptr = mkStore closure_ptr info_ptr