----------------------------------------------------------------------------- -- -- Code generation for PrimOps. -- -- (c) The University of Glasgow 2004-2006 -- ----------------------------------------------------------------------------- module CgPrimOp ( cgPrimOp ) where import BasicTypes import ForeignCall import ClosureInfo import StgSyn import CgForeignCall import CgBindery import CgMonad import CgHeapery import CgInfoTbls import CgTicky import CgProf import CgUtils import OldCmm import CLabel import OldCmmUtils import PrimOp import SMRep import Module import Constants import Outputable import FastString -- --------------------------------------------------------------------------- -- Code generation for PrimOps cgPrimOp :: CmmFormals -- where to put the results -> PrimOp -- the op -> [StgArg] -- arguments -> StgLiveVars -- live vars, in case we need to save them -> Code cgPrimOp results op args live = do arg_exprs <- getArgAmodes args let non_void_args = [ e | (r,e) <- arg_exprs, nonVoidArg r ] emitPrimOp results op non_void_args live emitPrimOp :: CmmFormals -- where to put the results -> PrimOp -- the op -> [CmmExpr] -- arguments -> StgLiveVars -- live vars, in case we need to save them -> Code -- First we handle various awkward cases specially. The remaining -- easy cases are then handled by translateOp, defined below. emitPrimOp [res_r,res_c] IntAddCOp [aa,bb] _ {- With some bit-twiddling, we can define int{Add,Sub}Czh portably in C, and without needing any comparisons. This may not be the fastest way to do it - if you have better code, please send it! --SDM Return : r = a + b, c = 0 if no overflow, 1 on overflow. We currently don't make use of the r value if c is != 0 (i.e. overflow), we just convert to big integers and try again. This could be improved by making r and c the correct values for plugging into a new J#. { r = ((I_)(a)) + ((I_)(b)); \ c = ((StgWord)(~(((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \ >> (BITS_IN (I_) - 1); \ } Wading through the mass of bracketry, it seems to reduce to: c = ( (~(a^b)) & (a^r) ) >>unsigned (BITS_IN(I_)-1) -} = stmtsC [ CmmAssign (CmmLocal res_r) (CmmMachOp mo_wordAdd [aa,bb]), CmmAssign (CmmLocal res_c) $ CmmMachOp mo_wordUShr [ CmmMachOp mo_wordAnd [ CmmMachOp mo_wordNot [CmmMachOp mo_wordXor [aa,bb]], CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)] ], CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1)) ] ] emitPrimOp [res_r,res_c] IntSubCOp [aa,bb] _ {- Similarly: #define subIntCzh(r,c,a,b) \ { r = ((I_)(a)) - ((I_)(b)); \ c = ((StgWord)((((I_)(a))^((I_)(b))) & (((I_)(a))^r))) \ >> (BITS_IN (I_) - 1); \ } c = ((a^b) & (a^r)) >>unsigned (BITS_IN(I_)-1) -} = stmtsC [ CmmAssign (CmmLocal res_r) (CmmMachOp mo_wordSub [aa,bb]), CmmAssign (CmmLocal res_c) $ CmmMachOp mo_wordUShr [ CmmMachOp mo_wordAnd [ CmmMachOp mo_wordXor [aa,bb], CmmMachOp mo_wordXor [aa, CmmReg (CmmLocal res_r)] ], CmmLit (mkIntCLit (wORD_SIZE_IN_BITS - 1)) ] ] emitPrimOp [res] ParOp [arg] live = do -- for now, just implement this in a C function -- later, we might want to inline it. vols <- getVolatileRegs live emitForeignCall' PlayRisky [CmmHinted res NoHint] (CmmCallee newspark CCallConv) [ (CmmHinted (CmmReg (CmmGlobal BaseReg)) AddrHint) , (CmmHinted arg AddrHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn where newspark = CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "newSpark"))) emitPrimOp [res] ReadMutVarOp [mutv] _ = stmtC (CmmAssign (CmmLocal res) (cmmLoadIndexW mutv fixedHdrSize gcWord)) emitPrimOp [] WriteMutVarOp [mutv,var] live = do stmtC (CmmStore (cmmOffsetW mutv fixedHdrSize) var) vols <- getVolatileRegs live emitForeignCall' PlayRisky [{-no results-}] (CmmCallee (CmmLit (CmmLabel mkDirty_MUT_VAR_Label)) CCallConv) [ (CmmHinted (CmmReg (CmmGlobal BaseReg)) AddrHint) , (CmmHinted mutv AddrHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn -- #define sizzeofByteArrayzh(r,a) \ -- r = ((StgArrWords *)(a))->bytes emitPrimOp [res] SizeofByteArrayOp [arg] _ = stmtC $ CmmAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord) -- #define sizzeofMutableByteArrayzh(r,a) \ -- r = ((StgArrWords *)(a))->bytes emitPrimOp [res] SizeofMutableByteArrayOp [arg] live = emitPrimOp [res] SizeofByteArrayOp [arg] live -- #define touchzh(o) /* nothing */ emitPrimOp [] TouchOp [_] _ = nopC -- #define byteArrayContentszh(r,a) r = BYTE_ARR_CTS(a) emitPrimOp [res] ByteArrayContents_Char [arg] _ = stmtC (CmmAssign (CmmLocal res) (cmmOffsetB arg arrWordsHdrSize)) -- #define stableNameToIntzh(r,s) (r = ((StgStableName *)s)->sn) emitPrimOp [res] StableNameToIntOp [arg] _ = stmtC (CmmAssign (CmmLocal res) (cmmLoadIndexW arg fixedHdrSize bWord)) -- #define eqStableNamezh(r,sn1,sn2) \ -- (r = (((StgStableName *)sn1)->sn == ((StgStableName *)sn2)->sn)) emitPrimOp [res] EqStableNameOp [arg1,arg2] _ = stmtC (CmmAssign (CmmLocal res) (CmmMachOp mo_wordEq [ cmmLoadIndexW arg1 fixedHdrSize bWord, cmmLoadIndexW arg2 fixedHdrSize bWord ])) emitPrimOp [res] ReallyUnsafePtrEqualityOp [arg1,arg2] _ = stmtC (CmmAssign (CmmLocal res) (CmmMachOp mo_wordEq [arg1,arg2])) -- #define addrToHValuezh(r,a) r=(P_)a emitPrimOp [res] AddrToHValueOp [arg] _ = stmtC (CmmAssign (CmmLocal res) arg) -- #define dataToTagzh(r,a) r=(GET_TAG(((StgClosure *)a)->header.info)) -- Note: argument may be tagged! emitPrimOp [res] DataToTagOp [arg] _ = stmtC (CmmAssign (CmmLocal res) (getConstrTag (cmmUntag arg))) {- Freezing arrays-of-ptrs requires changing an info table, for the benefit of the generational collector. It needs to scavenge mutable objects, even if they are in old space. When they become immutable, they can be removed from this scavenge list. -} -- #define unsafeFreezzeArrayzh(r,a) -- { -- SET_INFO((StgClosure *)a,&stg_MUT_ARR_PTRS_FROZEN0_info); -- r = a; -- } emitPrimOp [res] UnsafeFreezeArrayOp [arg] _ = stmtsC [ setInfo arg (CmmLit (CmmLabel mkMAP_FROZEN_infoLabel)), CmmAssign (CmmLocal res) arg ] -- #define unsafeFreezzeByteArrayzh(r,a) r=(a) emitPrimOp [res] UnsafeFreezeByteArrayOp [arg] _ = stmtC (CmmAssign (CmmLocal res) arg) emitPrimOp [] CopyArrayOp [src,src_off,dst,dst_off,n] live = doCopyArrayOp src src_off dst dst_off n live emitPrimOp [] CopyMutableArrayOp [src,src_off,dst,dst_off,n] live = doCopyMutableArrayOp src src_off dst dst_off n live emitPrimOp [res] CloneArrayOp [src,src_off,n] live = emitCloneArray mkMAP_FROZEN_infoLabel res src src_off n live emitPrimOp [res] CloneMutableArrayOp [src,src_off,n] live = emitCloneArray mkMAP_DIRTY_infoLabel res src src_off n live emitPrimOp [res] FreezeArrayOp [src,src_off,n] live = emitCloneArray mkMAP_FROZEN_infoLabel res src src_off n live emitPrimOp [res] ThawArrayOp [src,src_off,n] live = emitCloneArray mkMAP_DIRTY_infoLabel res src src_off n live -- Reading/writing pointer arrays emitPrimOp [r] ReadArrayOp [obj,ix] _ = doReadPtrArrayOp r obj ix emitPrimOp [r] IndexArrayOp [obj,ix] _ = doReadPtrArrayOp r obj ix emitPrimOp [] WriteArrayOp [obj,ix,v] _ = doWritePtrArrayOp obj ix v emitPrimOp [res] SizeofArrayOp [arg] _ = stmtC $ CmmAssign (CmmLocal res) (cmmLoadIndexW arg (fixedHdrSize + oFFSET_StgMutArrPtrs_ptrs) bWord) emitPrimOp [res] SizeofMutableArrayOp [arg] live = emitPrimOp [res] SizeofArrayOp [arg] live -- IndexXXXoffAddr emitPrimOp res IndexOffAddrOp_Char args _ = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args emitPrimOp res IndexOffAddrOp_WideChar args _ = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args emitPrimOp res IndexOffAddrOp_Int args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res IndexOffAddrOp_Word args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res IndexOffAddrOp_Addr args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res IndexOffAddrOp_Float args _ = doIndexOffAddrOp Nothing f32 res args emitPrimOp res IndexOffAddrOp_Double args _ = doIndexOffAddrOp Nothing f64 res args emitPrimOp res IndexOffAddrOp_StablePtr args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res IndexOffAddrOp_Int8 args _ = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args emitPrimOp res IndexOffAddrOp_Int16 args _ = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args emitPrimOp res IndexOffAddrOp_Int32 args _ = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args emitPrimOp res IndexOffAddrOp_Int64 args _ = doIndexOffAddrOp Nothing b64 res args emitPrimOp res IndexOffAddrOp_Word8 args _ = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args emitPrimOp res IndexOffAddrOp_Word16 args _ = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args emitPrimOp res IndexOffAddrOp_Word32 args _ = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args emitPrimOp res IndexOffAddrOp_Word64 args _ = doIndexOffAddrOp Nothing b64 res args -- ReadXXXoffAddr, which are identical, for our purposes, to IndexXXXoffAddr. emitPrimOp res ReadOffAddrOp_Char args _ = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args emitPrimOp res ReadOffAddrOp_WideChar args _ = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args emitPrimOp res ReadOffAddrOp_Int args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res ReadOffAddrOp_Word args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res ReadOffAddrOp_Addr args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res ReadOffAddrOp_Float args _ = doIndexOffAddrOp Nothing f32 res args emitPrimOp res ReadOffAddrOp_Double args _ = doIndexOffAddrOp Nothing f64 res args emitPrimOp res ReadOffAddrOp_StablePtr args _ = doIndexOffAddrOp Nothing bWord res args emitPrimOp res ReadOffAddrOp_Int8 args _ = doIndexOffAddrOp (Just mo_s_8ToWord) b8 res args emitPrimOp res ReadOffAddrOp_Int16 args _ = doIndexOffAddrOp (Just mo_s_16ToWord) b16 res args emitPrimOp res ReadOffAddrOp_Int32 args _ = doIndexOffAddrOp (Just mo_s_32ToWord) b32 res args emitPrimOp res ReadOffAddrOp_Int64 args _ = doIndexOffAddrOp Nothing b64 res args emitPrimOp res ReadOffAddrOp_Word8 args _ = doIndexOffAddrOp (Just mo_u_8ToWord) b8 res args emitPrimOp res ReadOffAddrOp_Word16 args _ = doIndexOffAddrOp (Just mo_u_16ToWord) b16 res args emitPrimOp res ReadOffAddrOp_Word32 args _ = doIndexOffAddrOp (Just mo_u_32ToWord) b32 res args emitPrimOp res ReadOffAddrOp_Word64 args _ = doIndexOffAddrOp Nothing b64 res args -- IndexXXXArray emitPrimOp res IndexByteArrayOp_Char args _ = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args emitPrimOp res IndexByteArrayOp_WideChar args _ = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args emitPrimOp res IndexByteArrayOp_Int args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res IndexByteArrayOp_Word args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res IndexByteArrayOp_Addr args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res IndexByteArrayOp_Float args _ = doIndexByteArrayOp Nothing f32 res args emitPrimOp res IndexByteArrayOp_Double args _ = doIndexByteArrayOp Nothing f64 res args emitPrimOp res IndexByteArrayOp_StablePtr args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res IndexByteArrayOp_Int8 args _ = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args emitPrimOp res IndexByteArrayOp_Int16 args _ = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args emitPrimOp res IndexByteArrayOp_Int32 args _ = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args emitPrimOp res IndexByteArrayOp_Int64 args _ = doIndexByteArrayOp Nothing b64 res args emitPrimOp res IndexByteArrayOp_Word8 args _ = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args emitPrimOp res IndexByteArrayOp_Word16 args _ = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args emitPrimOp res IndexByteArrayOp_Word32 args _ = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args emitPrimOp res IndexByteArrayOp_Word64 args _ = doIndexByteArrayOp Nothing b64 res args -- ReadXXXArray, identical to IndexXXXArray. emitPrimOp res ReadByteArrayOp_Char args _ = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args emitPrimOp res ReadByteArrayOp_WideChar args _ = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args emitPrimOp res ReadByteArrayOp_Int args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res ReadByteArrayOp_Word args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res ReadByteArrayOp_Addr args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res ReadByteArrayOp_Float args _ = doIndexByteArrayOp Nothing f32 res args emitPrimOp res ReadByteArrayOp_Double args _ = doIndexByteArrayOp Nothing f64 res args emitPrimOp res ReadByteArrayOp_StablePtr args _ = doIndexByteArrayOp Nothing bWord res args emitPrimOp res ReadByteArrayOp_Int8 args _ = doIndexByteArrayOp (Just mo_s_8ToWord) b8 res args emitPrimOp res ReadByteArrayOp_Int16 args _ = doIndexByteArrayOp (Just mo_s_16ToWord) b16 res args emitPrimOp res ReadByteArrayOp_Int32 args _ = doIndexByteArrayOp (Just mo_s_32ToWord) b32 res args emitPrimOp res ReadByteArrayOp_Int64 args _ = doIndexByteArrayOp Nothing b64 res args emitPrimOp res ReadByteArrayOp_Word8 args _ = doIndexByteArrayOp (Just mo_u_8ToWord) b8 res args emitPrimOp res ReadByteArrayOp_Word16 args _ = doIndexByteArrayOp (Just mo_u_16ToWord) b16 res args emitPrimOp res ReadByteArrayOp_Word32 args _ = doIndexByteArrayOp (Just mo_u_32ToWord) b32 res args emitPrimOp res ReadByteArrayOp_Word64 args _ = doIndexByteArrayOp Nothing b64 res args -- WriteXXXoffAddr emitPrimOp res WriteOffAddrOp_Char args _ = doWriteOffAddrOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteOffAddrOp_WideChar args _ = doWriteOffAddrOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteOffAddrOp_Int args _ = doWriteOffAddrOp Nothing bWord res args emitPrimOp res WriteOffAddrOp_Word args _ = doWriteOffAddrOp Nothing bWord res args emitPrimOp res WriteOffAddrOp_Addr args _ = doWriteOffAddrOp Nothing bWord res args emitPrimOp res WriteOffAddrOp_Float args _ = doWriteOffAddrOp Nothing f32 res args emitPrimOp res WriteOffAddrOp_Double args _ = doWriteOffAddrOp Nothing f64 res args emitPrimOp res WriteOffAddrOp_StablePtr args _ = doWriteOffAddrOp Nothing bWord res args emitPrimOp res WriteOffAddrOp_Int8 args _ = doWriteOffAddrOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteOffAddrOp_Int16 args _ = doWriteOffAddrOp (Just mo_WordTo16) b16 res args emitPrimOp res WriteOffAddrOp_Int32 args _ = doWriteOffAddrOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteOffAddrOp_Int64 args _ = doWriteOffAddrOp Nothing b64 res args emitPrimOp res WriteOffAddrOp_Word8 args _ = doWriteOffAddrOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteOffAddrOp_Word16 args _ = doWriteOffAddrOp (Just mo_WordTo16) b16 res args emitPrimOp res WriteOffAddrOp_Word32 args _ = doWriteOffAddrOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteOffAddrOp_Word64 args _ = doWriteOffAddrOp Nothing b64 res args -- WriteXXXArray emitPrimOp res WriteByteArrayOp_Char args _ = doWriteByteArrayOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteByteArrayOp_WideChar args _ = doWriteByteArrayOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteByteArrayOp_Int args _ = doWriteByteArrayOp Nothing bWord res args emitPrimOp res WriteByteArrayOp_Word args _ = doWriteByteArrayOp Nothing bWord res args emitPrimOp res WriteByteArrayOp_Addr args _ = doWriteByteArrayOp Nothing bWord res args emitPrimOp res WriteByteArrayOp_Float args _ = doWriteByteArrayOp Nothing f32 res args emitPrimOp res WriteByteArrayOp_Double args _ = doWriteByteArrayOp Nothing f64 res args emitPrimOp res WriteByteArrayOp_StablePtr args _ = doWriteByteArrayOp Nothing bWord res args emitPrimOp res WriteByteArrayOp_Int8 args _ = doWriteByteArrayOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteByteArrayOp_Int16 args _ = doWriteByteArrayOp (Just mo_WordTo16) b16 res args emitPrimOp res WriteByteArrayOp_Int32 args _ = doWriteByteArrayOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteByteArrayOp_Int64 args _ = doWriteByteArrayOp Nothing b64 res args emitPrimOp res WriteByteArrayOp_Word8 args _ = doWriteByteArrayOp (Just mo_WordTo8) b8 res args emitPrimOp res WriteByteArrayOp_Word16 args _ = doWriteByteArrayOp (Just mo_WordTo16) b16 res args emitPrimOp res WriteByteArrayOp_Word32 args _ = doWriteByteArrayOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteByteArrayOp_Word64 args _ = doWriteByteArrayOp Nothing b64 res args -- The rest just translate straightforwardly emitPrimOp [res] op [arg] _ | nopOp op = stmtC (CmmAssign (CmmLocal res) arg) | Just (mop,rep) <- narrowOp op = stmtC (CmmAssign (CmmLocal res) $ CmmMachOp (mop rep wordWidth) [CmmMachOp (mop wordWidth rep) [arg]]) emitPrimOp [res] op args live | Just prim <- callishOp op = do vols <- getVolatileRegs live emitForeignCall' PlayRisky [CmmHinted res NoHint] (CmmPrim prim) [CmmHinted a NoHint | a<-args] -- ToDo: hints? (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn | Just mop <- translateOp op = let stmt = CmmAssign (CmmLocal res) (CmmMachOp mop args) in stmtC stmt emitPrimOp _ op _ _ = pprPanic "emitPrimOp: can't translate PrimOp" (ppr op) -- These PrimOps are NOPs in Cmm nopOp :: PrimOp -> Bool nopOp Int2WordOp = True nopOp Word2IntOp = True nopOp Int2AddrOp = True nopOp Addr2IntOp = True nopOp ChrOp = True -- Int# and Char# are rep'd the same nopOp OrdOp = True nopOp _ = False -- These PrimOps turn into double casts narrowOp :: PrimOp -> Maybe (Width -> Width -> MachOp, Width) narrowOp Narrow8IntOp = Just (MO_SS_Conv, W8) narrowOp Narrow16IntOp = Just (MO_SS_Conv, W16) narrowOp Narrow32IntOp = Just (MO_SS_Conv, W32) narrowOp Narrow8WordOp = Just (MO_UU_Conv, W8) narrowOp Narrow16WordOp = Just (MO_UU_Conv, W16) narrowOp Narrow32WordOp = Just (MO_UU_Conv, W32) narrowOp _ = Nothing -- Native word signless ops translateOp :: PrimOp -> Maybe MachOp translateOp IntAddOp = Just mo_wordAdd translateOp IntSubOp = Just mo_wordSub translateOp WordAddOp = Just mo_wordAdd translateOp WordSubOp = Just mo_wordSub translateOp AddrAddOp = Just mo_wordAdd translateOp AddrSubOp = Just mo_wordSub translateOp IntEqOp = Just mo_wordEq translateOp IntNeOp = Just mo_wordNe translateOp WordEqOp = Just mo_wordEq translateOp WordNeOp = Just mo_wordNe translateOp AddrEqOp = Just mo_wordEq translateOp AddrNeOp = Just mo_wordNe translateOp AndOp = Just mo_wordAnd translateOp OrOp = Just mo_wordOr translateOp XorOp = Just mo_wordXor translateOp NotOp = Just mo_wordNot translateOp SllOp = Just mo_wordShl translateOp SrlOp = Just mo_wordUShr translateOp AddrRemOp = Just mo_wordURem -- Native word signed ops translateOp IntMulOp = Just mo_wordMul translateOp IntMulMayOfloOp = Just (MO_S_MulMayOflo wordWidth) translateOp IntQuotOp = Just mo_wordSQuot translateOp IntRemOp = Just mo_wordSRem translateOp IntNegOp = Just mo_wordSNeg translateOp IntGeOp = Just mo_wordSGe translateOp IntLeOp = Just mo_wordSLe translateOp IntGtOp = Just mo_wordSGt translateOp IntLtOp = Just mo_wordSLt translateOp ISllOp = Just mo_wordShl translateOp ISraOp = Just mo_wordSShr translateOp ISrlOp = Just mo_wordUShr -- Native word unsigned ops translateOp WordGeOp = Just mo_wordUGe translateOp WordLeOp = Just mo_wordULe translateOp WordGtOp = Just mo_wordUGt translateOp WordLtOp = Just mo_wordULt translateOp WordMulOp = Just mo_wordMul translateOp WordQuotOp = Just mo_wordUQuot translateOp WordRemOp = Just mo_wordURem translateOp AddrGeOp = Just mo_wordUGe translateOp AddrLeOp = Just mo_wordULe translateOp AddrGtOp = Just mo_wordUGt translateOp AddrLtOp = Just mo_wordULt -- Char# ops translateOp CharEqOp = Just (MO_Eq wordWidth) translateOp CharNeOp = Just (MO_Ne wordWidth) translateOp CharGeOp = Just (MO_U_Ge wordWidth) translateOp CharLeOp = Just (MO_U_Le wordWidth) translateOp CharGtOp = Just (MO_U_Gt wordWidth) translateOp CharLtOp = Just (MO_U_Lt wordWidth) -- Double ops translateOp DoubleEqOp = Just (MO_F_Eq W64) translateOp DoubleNeOp = Just (MO_F_Ne W64) translateOp DoubleGeOp = Just (MO_F_Ge W64) translateOp DoubleLeOp = Just (MO_F_Le W64) translateOp DoubleGtOp = Just (MO_F_Gt W64) translateOp DoubleLtOp = Just (MO_F_Lt W64) translateOp DoubleAddOp = Just (MO_F_Add W64) translateOp DoubleSubOp = Just (MO_F_Sub W64) translateOp DoubleMulOp = Just (MO_F_Mul W64) translateOp DoubleDivOp = Just (MO_F_Quot W64) translateOp DoubleNegOp = Just (MO_F_Neg W64) -- Float ops translateOp FloatEqOp = Just (MO_F_Eq W32) translateOp FloatNeOp = Just (MO_F_Ne W32) translateOp FloatGeOp = Just (MO_F_Ge W32) translateOp FloatLeOp = Just (MO_F_Le W32) translateOp FloatGtOp = Just (MO_F_Gt W32) translateOp FloatLtOp = Just (MO_F_Lt W32) translateOp FloatAddOp = Just (MO_F_Add W32) translateOp FloatSubOp = Just (MO_F_Sub W32) translateOp FloatMulOp = Just (MO_F_Mul W32) translateOp FloatDivOp = Just (MO_F_Quot W32) translateOp FloatNegOp = Just (MO_F_Neg W32) -- Conversions translateOp Int2DoubleOp = Just (MO_SF_Conv wordWidth W64) translateOp Double2IntOp = Just (MO_FS_Conv W64 wordWidth) translateOp Int2FloatOp = Just (MO_SF_Conv wordWidth W32) translateOp Float2IntOp = Just (MO_FS_Conv W32 wordWidth) translateOp Float2DoubleOp = Just (MO_FF_Conv W32 W64) translateOp Double2FloatOp = Just (MO_FF_Conv W64 W32) -- Word comparisons masquerading as more exotic things. translateOp SameMutVarOp = Just mo_wordEq translateOp SameMVarOp = Just mo_wordEq translateOp SameMutableArrayOp = Just mo_wordEq translateOp SameMutableByteArrayOp = Just mo_wordEq translateOp SameTVarOp = Just mo_wordEq translateOp EqStablePtrOp = Just mo_wordEq translateOp _ = Nothing -- These primops are implemented by CallishMachOps, because they sometimes -- turn into foreign calls depending on the backend. callishOp :: PrimOp -> Maybe CallishMachOp callishOp DoublePowerOp = Just MO_F64_Pwr callishOp DoubleSinOp = Just MO_F64_Sin callishOp DoubleCosOp = Just MO_F64_Cos callishOp DoubleTanOp = Just MO_F64_Tan callishOp DoubleSinhOp = Just MO_F64_Sinh callishOp DoubleCoshOp = Just MO_F64_Cosh callishOp DoubleTanhOp = Just MO_F64_Tanh callishOp DoubleAsinOp = Just MO_F64_Asin callishOp DoubleAcosOp = Just MO_F64_Acos callishOp DoubleAtanOp = Just MO_F64_Atan callishOp DoubleLogOp = Just MO_F64_Log callishOp DoubleExpOp = Just MO_F64_Exp callishOp DoubleSqrtOp = Just MO_F64_Sqrt callishOp FloatPowerOp = Just MO_F32_Pwr callishOp FloatSinOp = Just MO_F32_Sin callishOp FloatCosOp = Just MO_F32_Cos callishOp FloatTanOp = Just MO_F32_Tan callishOp FloatSinhOp = Just MO_F32_Sinh callishOp FloatCoshOp = Just MO_F32_Cosh callishOp FloatTanhOp = Just MO_F32_Tanh callishOp FloatAsinOp = Just MO_F32_Asin callishOp FloatAcosOp = Just MO_F32_Acos callishOp FloatAtanOp = Just MO_F32_Atan callishOp FloatLogOp = Just MO_F32_Log callishOp FloatExpOp = Just MO_F32_Exp callishOp FloatSqrtOp = Just MO_F32_Sqrt callishOp _ = Nothing ------------------------------------------------------------------------------ -- Helpers for translating various minor variants of array indexing. -- Bytearrays outside the heap; hence non-pointers doIndexOffAddrOp, doIndexByteArrayOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> Code doIndexOffAddrOp maybe_post_read_cast rep [res] [addr,idx] = mkBasicIndexedRead 0 maybe_post_read_cast rep res addr idx doIndexOffAddrOp _ _ _ _ = panic "CgPrimOp: doIndexOffAddrOp" doIndexByteArrayOp maybe_post_read_cast rep [res] [addr,idx] = mkBasicIndexedRead arrWordsHdrSize maybe_post_read_cast rep res addr idx doIndexByteArrayOp _ _ _ _ = panic "CgPrimOp: doIndexByteArrayOp" doReadPtrArrayOp :: LocalReg -> CmmExpr -> CmmExpr -> Code doReadPtrArrayOp res addr idx = mkBasicIndexedRead arrPtrsHdrSize Nothing gcWord res addr idx doWriteOffAddrOp, doWriteByteArrayOp :: Maybe MachOp -> CmmType -> [LocalReg] -> [CmmExpr] -> Code doWriteOffAddrOp maybe_pre_write_cast rep [] [addr,idx,val] = mkBasicIndexedWrite 0 maybe_pre_write_cast rep addr idx val doWriteOffAddrOp _ _ _ _ = panic "CgPrimOp: doWriteOffAddrOp" doWriteByteArrayOp maybe_pre_write_cast rep [] [addr,idx,val] = mkBasicIndexedWrite arrWordsHdrSize maybe_pre_write_cast rep addr idx val doWriteByteArrayOp _ _ _ _ = panic "CgPrimOp: doWriteByteArrayOp" doWritePtrArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> Code doWritePtrArrayOp addr idx val = do mkBasicIndexedWrite arrPtrsHdrSize Nothing bWord addr idx val stmtC (setInfo addr (CmmLit (CmmLabel mkMAP_DIRTY_infoLabel))) -- the write barrier. We must write a byte into the mark table: -- bits8[a + header_size + StgMutArrPtrs_size(a) + x >> N] stmtC $ CmmStore ( cmmOffsetExpr (cmmOffsetExprW (cmmOffsetB addr arrPtrsHdrSize) (loadArrPtrsSize addr)) (CmmMachOp mo_wordUShr [idx, CmmLit (mkIntCLit mUT_ARR_PTRS_CARD_BITS)]) ) (CmmLit (CmmInt 1 W8)) loadArrPtrsSize :: CmmExpr -> CmmExpr loadArrPtrsSize addr = CmmLoad (cmmOffsetB addr off) bWord where off = fixedHdrSize*wORD_SIZE + oFFSET_StgMutArrPtrs_ptrs mkBasicIndexedRead :: ByteOff -> Maybe MachOp -> CmmType -> LocalReg -> CmmExpr -> CmmExpr -> Code mkBasicIndexedRead off Nothing read_rep res base idx = stmtC (CmmAssign (CmmLocal res) (cmmLoadIndexOffExpr off read_rep base idx)) mkBasicIndexedRead off (Just cast) read_rep res base idx = stmtC (CmmAssign (CmmLocal res) (CmmMachOp cast [ cmmLoadIndexOffExpr off read_rep base idx])) mkBasicIndexedWrite :: ByteOff -> Maybe MachOp -> CmmType -> CmmExpr -> CmmExpr -> CmmExpr -> Code mkBasicIndexedWrite off Nothing write_rep base idx val = stmtC (CmmStore (cmmIndexOffExpr off write_rep base idx) val) mkBasicIndexedWrite off (Just cast) write_rep base idx val = stmtC (CmmStore (cmmIndexOffExpr off write_rep base idx) (CmmMachOp cast [val])) -- ---------------------------------------------------------------------------- -- Misc utils cmmIndexOffExpr :: ByteOff -> CmmType -> CmmExpr -> CmmExpr -> CmmExpr cmmIndexOffExpr off rep base idx = cmmIndexExpr (typeWidth rep) (cmmOffsetB base off) idx cmmLoadIndexOffExpr :: ByteOff -> CmmType -> CmmExpr -> CmmExpr -> CmmExpr cmmLoadIndexOffExpr off rep base idx = CmmLoad (cmmIndexOffExpr off rep base idx) rep setInfo :: CmmExpr -> CmmExpr -> CmmStmt setInfo closure_ptr info_ptr = CmmStore closure_ptr info_ptr -- ---------------------------------------------------------------------------- -- Copying pointer arrays -- | Takes a source 'Array#', an offset in the source array, a -- destination 'MutableArray#', an offset into the destination array, -- and the number of elements to copy. Copies the given number of -- elements from the source array to the destination array. doCopyArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code doCopyArrayOp = emitCopyArray copy where -- Copy data (we assume the arrays aren't overlapping since -- they're of different types) copy _src _dst = emitMemcpyCall -- | Takes a source 'MutableArray#', an offset in the source array, a -- destination 'MutableArray#', an offset into the destination array, -- and the number of elements to copy. Copies the given number of -- elements from the source array to the destination array. doCopyMutableArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code doCopyMutableArrayOp = emitCopyArray copy where -- The only time the memory might overlap is when the two arrays -- we were provided are the same array! -- TODO: Optimize branch for common case of no aliasing. copy src dst dst_p src_p bytes live = emitIfThenElse (cmmEqWord src dst) (emitMemmoveCall dst_p src_p bytes live) (emitMemcpyCall dst_p src_p bytes live) emitCopyArray :: (CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code) -> CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitCopyArray copy src0 src_off0 dst0 dst_off0 n0 live = do -- Assign the arguments to temporaries so the code generator can -- calculate liveness for us. src <- assignTemp_ src0 src_off <- assignTemp_ src_off0 dst <- assignTemp_ dst0 dst_off <- assignTemp_ dst_off0 n <- assignTemp_ n0 -- Set the dirty bit in the header. stmtC (setInfo dst (CmmLit (CmmLabel mkMAP_DIRTY_infoLabel))) dst_elems_p <- assignTemp $ cmmOffsetB dst arrPtrsHdrSize dst_p <- assignTemp $ cmmOffsetExprW dst_elems_p dst_off src_p <- assignTemp $ cmmOffsetExprW (cmmOffsetB src arrPtrsHdrSize) src_off bytes <- assignTemp $ cmmMulWord n (CmmLit (mkIntCLit wORD_SIZE)) copy src dst dst_p src_p bytes live -- The base address of the destination card table dst_cards_p <- assignTemp $ cmmOffsetExprW dst_elems_p (loadArrPtrsSize dst) emitSetCards dst_off dst_cards_p n live -- | Takes an info table label, a register to return the newly -- allocated array in, a source array, an offset in the source array, -- and the number of elements to copy. Allocates a new array and -- initializes it form the source array. emitCloneArray :: CLabel -> CmmFormal -> CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitCloneArray info_p res_r src0 src_off0 n0 live = do -- Assign the arguments to temporaries so the code generator can -- calculate liveness for us. src <- assignTemp_ src0 src_off <- assignTemp_ src_off0 n <- assignTemp_ n0 card_words <- assignTemp $ (n `cmmUShrWord` (CmmLit (mkIntCLit mUT_ARR_PTRS_CARD_BITS))) `cmmAddWord` CmmLit (mkIntCLit 1) size <- assignTemp $ n `cmmAddWord` card_words words <- assignTemp $ arrPtrsHdrSizeW `cmmAddWord` size arr_r <- newTemp bWord emitAllocateCall arr_r myCapability words live tickyAllocPrim (CmmLit (mkIntCLit arrPtrsHdrSize)) (n `cmmMulWord` wordSize) (CmmLit $ mkIntCLit 0) let arr = CmmReg (CmmLocal arr_r) emitSetDynHdr arr (CmmLit (CmmLabel info_p)) curCCSAddr stmtC $ CmmStore (cmmOffsetB arr (fixedHdrSize * wORD_SIZE + oFFSET_StgMutArrPtrs_ptrs)) n stmtC $ CmmStore (cmmOffsetB arr (fixedHdrSize * wORD_SIZE + oFFSET_StgMutArrPtrs_size)) size dst_p <- assignTemp $ cmmOffsetB arr arrPtrsHdrSize src_p <- assignTemp $ cmmOffsetExprW (cmmOffsetB src arrPtrsHdrSize) src_off emitMemcpyCall dst_p src_p (n `cmmMulWord` wordSize) live emitMemsetCall (cmmOffsetExprW dst_p n) (CmmLit (mkIntCLit 1)) (card_words `cmmMulWord` wordSize) live stmtC $ CmmAssign (CmmLocal res_r) arr where arrPtrsHdrSizeW = CmmLit $ mkIntCLit $ fixedHdrSize + (sIZEOF_StgMutArrPtrs_NoHdr `div` wORD_SIZE) wordSize = CmmLit (mkIntCLit wORD_SIZE) myCapability = CmmReg baseReg `cmmSubWord` CmmLit (mkIntCLit oFFSET_Capability_r) -- | Takes and offset in the destination array, the base address of -- the card table, and the number of elements affected (*not* the -- number of cards). Marks the relevant cards as dirty. emitSetCards :: CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitSetCards dst_start dst_cards_start n live = do start_card <- assignTemp $ card dst_start emitMemsetCall (dst_cards_start `cmmAddWord` start_card) (CmmLit (mkIntCLit 1)) ((card (dst_start `cmmAddWord` n) `cmmSubWord` start_card) `cmmAddWord` CmmLit (mkIntCLit 1)) live where -- Convert an element index to a card index card i = i `cmmUShrWord` (CmmLit (mkIntCLit mUT_ARR_PTRS_CARD_BITS)) -- | Emit a call to @memcpy@. emitMemcpyCall :: CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitMemcpyCall dst src n live = do vols <- getVolatileRegs live emitForeignCall' PlayRisky [{-no results-}] (CmmCallee memcpy CCallConv) [ (CmmHinted dst AddrHint) , (CmmHinted src AddrHint) , (CmmHinted n NoHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn where memcpy = CmmLit (CmmLabel (mkForeignLabel (fsLit "memcpy") Nothing ForeignLabelInExternalPackage IsFunction)) -- | Emit a call to @memmove@. emitMemmoveCall :: CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitMemmoveCall dst src n live = do vols <- getVolatileRegs live emitForeignCall' PlayRisky [{-no results-}] (CmmCallee memmove CCallConv) [ (CmmHinted dst AddrHint) , (CmmHinted src AddrHint) , (CmmHinted n NoHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn where memmove = CmmLit (CmmLabel (mkForeignLabel (fsLit "memmove") Nothing ForeignLabelInExternalPackage IsFunction)) -- | Emit a call to @memset@. The second argument must fit inside an -- unsigned char. emitMemsetCall :: CmmExpr -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitMemsetCall dst c n live = do vols <- getVolatileRegs live emitForeignCall' PlayRisky [{-no results-}] (CmmCallee memset CCallConv) [ (CmmHinted dst AddrHint) , (CmmHinted c NoHint) , (CmmHinted n NoHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn where memset = CmmLit (CmmLabel (mkForeignLabel (fsLit "memset") Nothing ForeignLabelInExternalPackage IsFunction)) -- | Emit a call to @allocate@. emitAllocateCall :: LocalReg -> CmmExpr -> CmmExpr -> StgLiveVars -> Code emitAllocateCall res cap n live = do vols <- getVolatileRegs live emitForeignCall' PlayRisky [CmmHinted res AddrHint] (CmmCallee allocate CCallConv) [ (CmmHinted cap AddrHint) , (CmmHinted n NoHint) ] (Just vols) NoC_SRT -- No SRT b/c we do PlayRisky CmmMayReturn where allocate = CmmLit (CmmLabel (mkForeignLabel (fsLit "allocate") Nothing ForeignLabelInExternalPackage IsFunction))