mirrored from https://gitlab.haskell.org/ghc/ghc.git
/
StgCmmPrim.hs
2132 lines (1819 loc) · 93.2 KB
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StgCmmPrim.hs
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{-# LANGUAGE CPP #-}
----------------------------------------------------------------------------
--
-- Stg to C--: primitive operations
--
-- (c) The University of Glasgow 2004-2006
--
-----------------------------------------------------------------------------
module StgCmmPrim (
cgOpApp,
cgPrimOp, -- internal(ish), used by cgCase to get code for a
-- comparison without also turning it into a Bool.
shouldInlinePrimOp
) where
#include "HsVersions.h"
import StgCmmLayout
import StgCmmForeign
import StgCmmEnv
import StgCmmMonad
import StgCmmUtils
import StgCmmTicky
import StgCmmHeap
import StgCmmProf ( costCentreFrom, curCCS )
import DynFlags
import Platform
import BasicTypes
import MkGraph
import StgSyn
import Cmm
import CmmInfo
import Type ( Type, tyConAppTyCon )
import TyCon
import CLabel
import CmmUtils
import PrimOp
import SMRep
import FastString
import Outputable
import Util
#if __GLASGOW_HASKELL__ >= 709
import Prelude hiding ((<*>))
#endif
import Data.Bits ((.&.), bit)
import Control.Monad (liftM, when)
------------------------------------------------------------------------
-- Primitive operations and foreign calls
------------------------------------------------------------------------
{- Note [Foreign call results]
~~~~~~~~~~~~~~~~~~~~~~~~~~~
A foreign call always returns an unboxed tuple of results, one
of which is the state token. This seems to happen even for pure
calls.
Even if we returned a single result for pure calls, it'd still be
right to wrap it in a singleton unboxed tuple, because the result
might be a Haskell closure pointer, we don't want to evaluate it. -}
----------------------------------
cgOpApp :: StgOp -- The op
-> [StgArg] -- Arguments
-> Type -- Result type (always an unboxed tuple)
-> FCode ReturnKind
-- Foreign calls
cgOpApp (StgFCallOp fcall _) stg_args res_ty
= cgForeignCall fcall stg_args res_ty
-- Note [Foreign call results]
-- tagToEnum# is special: we need to pull the constructor
-- out of the table, and perform an appropriate return.
cgOpApp (StgPrimOp TagToEnumOp) [arg] res_ty
= ASSERT(isEnumerationTyCon tycon)
do { dflags <- getDynFlags
; args' <- getNonVoidArgAmodes [arg]
; let amode = case args' of [amode] -> amode
_ -> panic "TagToEnumOp had void arg"
; emitReturn [tagToClosure dflags tycon amode] }
where
-- If you're reading this code in the attempt to figure
-- out why the compiler panic'ed here, it is probably because
-- you used tagToEnum# in a non-monomorphic setting, e.g.,
-- intToTg :: Enum a => Int -> a ; intToTg (I# x#) = tagToEnum# x#
-- That won't work.
tycon = tyConAppTyCon res_ty
cgOpApp (StgPrimOp primop) args res_ty = do
dflags <- getDynFlags
cmm_args <- getNonVoidArgAmodes args
case shouldInlinePrimOp dflags primop cmm_args of
Nothing -> do -- out-of-line
let fun = CmmLit (CmmLabel (mkRtsPrimOpLabel primop))
emitCall (NativeNodeCall, NativeReturn) fun cmm_args
Just f -- inline
| ReturnsPrim VoidRep <- result_info
-> do f []
emitReturn []
| ReturnsPrim rep <- result_info
-> do dflags <- getDynFlags
res <- newTemp (primRepCmmType dflags rep)
f [res]
emitReturn [CmmReg (CmmLocal res)]
| ReturnsAlg tycon <- result_info, isUnboxedTupleTyCon tycon
-> do (regs, _hints) <- newUnboxedTupleRegs res_ty
f regs
emitReturn (map (CmmReg . CmmLocal) regs)
| otherwise -> panic "cgPrimop"
where
result_info = getPrimOpResultInfo primop
cgOpApp (StgPrimCallOp primcall) args _res_ty
= do { cmm_args <- getNonVoidArgAmodes args
; let fun = CmmLit (CmmLabel (mkPrimCallLabel primcall))
; emitCall (NativeNodeCall, NativeReturn) fun cmm_args }
-- | Interpret the argument as an unsigned value, assuming the value
-- is given in two-complement form in the given width.
--
-- Example: @asUnsigned W64 (-1)@ is 18446744073709551615.
--
-- This function is used to work around the fact that many array
-- primops take Int# arguments, but we interpret them as unsigned
-- quantities in the code gen. This means that we have to be careful
-- every time we work on e.g. a CmmInt literal that corresponds to the
-- array size, as it might contain a negative Integer value if the
-- user passed a value larger than 2^(wORD_SIZE_IN_BITS-1) as the Int#
-- literal.
asUnsigned :: Width -> Integer -> Integer
asUnsigned w n = n .&. (bit (widthInBits w) - 1)
-- TODO: Several primop implementations (e.g. 'doNewByteArrayOp') use
-- ByteOff (or some other fixed width signed type) to represent
-- array sizes or indices. This means that these will overflow for
-- large enough sizes.
-- | Decide whether an out-of-line primop should be replaced by an
-- inline implementation. This might happen e.g. if there's enough
-- static information, such as statically know arguments, to emit a
-- more efficient implementation inline.
--
-- Returns 'Nothing' if this primop should use its out-of-line
-- implementation (defined elsewhere) and 'Just' together with a code
-- generating function that takes the output regs as arguments
-- otherwise.
shouldInlinePrimOp :: DynFlags
-> PrimOp -- ^ The primop
-> [CmmExpr] -- ^ The primop arguments
-> Maybe ([LocalReg] -> FCode ())
shouldInlinePrimOp dflags NewByteArrayOp_Char [(CmmLit (CmmInt n w))]
| asUnsigned w n <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> doNewByteArrayOp res (fromInteger n)
shouldInlinePrimOp dflags NewArrayOp [(CmmLit (CmmInt n w)), init]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] ->
doNewArrayOp res (arrPtrsRep dflags (fromInteger n)) mkMAP_DIRTY_infoLabel
[ (mkIntExpr dflags (fromInteger n),
fixedHdrSize dflags + oFFSET_StgMutArrPtrs_ptrs dflags)
, (mkIntExpr dflags (nonHdrSizeW (arrPtrsRep dflags (fromInteger n))),
fixedHdrSize dflags + oFFSET_StgMutArrPtrs_size dflags)
]
(fromInteger n) init
shouldInlinePrimOp _ CopyArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopyArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopyMutableArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopyMutableArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopyArrayArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopyArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopyMutableArrayArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopyMutableArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp dflags CloneArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneArray mkMAP_FROZEN_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags CloneMutableArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneArray mkMAP_DIRTY_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags FreezeArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneArray mkMAP_FROZEN_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags ThawArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneArray mkMAP_DIRTY_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags NewSmallArrayOp [(CmmLit (CmmInt n w)), init]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] ->
doNewArrayOp res (smallArrPtrsRep (fromInteger n)) mkSMAP_DIRTY_infoLabel
[ (mkIntExpr dflags (fromInteger n),
fixedHdrSize dflags + oFFSET_StgSmallMutArrPtrs_ptrs dflags)
]
(fromInteger n) init
shouldInlinePrimOp _ CopySmallArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopySmallArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp _ CopySmallMutableArrayOp
[src, src_off, dst, dst_off, (CmmLit (CmmInt n _))] =
Just $ \ [] -> doCopySmallMutableArrayOp src src_off dst dst_off (fromInteger n)
shouldInlinePrimOp dflags CloneSmallArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneSmallArray mkSMAP_FROZEN_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags CloneSmallMutableArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneSmallArray mkSMAP_DIRTY_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags FreezeSmallArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneSmallArray mkSMAP_FROZEN_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags ThawSmallArrayOp [src, src_off, (CmmLit (CmmInt n w))]
| wordsToBytes dflags (asUnsigned w n) <= fromIntegral (maxInlineAllocSize dflags) =
Just $ \ [res] -> emitCloneSmallArray mkSMAP_DIRTY_infoLabel res src src_off (fromInteger n)
shouldInlinePrimOp dflags primop args
| primOpOutOfLine primop = Nothing
| otherwise = Just $ \ regs -> emitPrimOp dflags regs primop args
-- TODO: Several primops, such as 'copyArray#', only have an inline
-- implementation (below) but could possibly have both an inline
-- implementation and an out-of-line implementation, just like
-- 'newArray#'. This would lower the amount of code generated,
-- hopefully without a performance impact (needs to be measured).
---------------------------------------------------
cgPrimOp :: [LocalReg] -- where to put the results
-> PrimOp -- the op
-> [StgArg] -- arguments
-> FCode ()
cgPrimOp results op args
= do dflags <- getDynFlags
arg_exprs <- getNonVoidArgAmodes args
emitPrimOp dflags results op arg_exprs
------------------------------------------------------------------------
-- Emitting code for a primop
------------------------------------------------------------------------
emitPrimOp :: DynFlags
-> [LocalReg] -- where to put the results
-> PrimOp -- the op
-> [CmmExpr] -- arguments
-> FCode ()
-- First we handle various awkward cases specially. The remaining
-- easy cases are then handled by translateOp, defined below.
emitPrimOp _ [res] ParOp [arg]
=
-- for now, just implement this in a C function
-- later, we might want to inline it.
emitCCall
[(res,NoHint)]
(CmmLit (CmmLabel (mkForeignLabel (fsLit "newSpark") Nothing ForeignLabelInExternalPackage IsFunction)))
[(CmmReg (CmmGlobal BaseReg), AddrHint), (arg,AddrHint)]
emitPrimOp dflags [res] SparkOp [arg]
= do
-- returns the value of arg in res. We're going to therefore
-- refer to arg twice (once to pass to newSpark(), and once to
-- assign to res), so put it in a temporary.
tmp <- assignTemp arg
tmp2 <- newTemp (bWord dflags)
emitCCall
[(tmp2,NoHint)]
(CmmLit (CmmLabel (mkForeignLabel (fsLit "newSpark") Nothing ForeignLabelInExternalPackage IsFunction)))
[(CmmReg (CmmGlobal BaseReg), AddrHint), ((CmmReg (CmmLocal tmp)), AddrHint)]
emitAssign (CmmLocal res) (CmmReg (CmmLocal tmp))
emitPrimOp dflags [res] GetCCSOfOp [arg]
= emitAssign (CmmLocal res) val
where
val
| gopt Opt_SccProfilingOn dflags = costCentreFrom dflags (cmmUntag dflags arg)
| otherwise = CmmLit (zeroCLit dflags)
emitPrimOp _ [res] GetCurrentCCSOp [_dummy_arg]
= emitAssign (CmmLocal res) curCCS
emitPrimOp dflags [res] ReadMutVarOp [mutv]
= emitAssign (CmmLocal res) (cmmLoadIndexW dflags mutv (fixedHdrSizeW dflags) (gcWord dflags))
emitPrimOp dflags [] WriteMutVarOp [mutv,var]
= do emitStore (cmmOffsetW dflags mutv (fixedHdrSizeW dflags)) var
emitCCall
[{-no results-}]
(CmmLit (CmmLabel mkDirty_MUT_VAR_Label))
[(CmmReg (CmmGlobal BaseReg), AddrHint), (mutv,AddrHint)]
-- #define sizzeofByteArrayzh(r,a) \
-- r = ((StgArrWords *)(a))->bytes
emitPrimOp dflags [res] SizeofByteArrayOp [arg]
= emit $ mkAssign (CmmLocal res) (cmmLoadIndexW dflags arg (fixedHdrSizeW dflags) (bWord dflags))
-- #define sizzeofMutableByteArrayzh(r,a) \
-- r = ((StgArrWords *)(a))->bytes
emitPrimOp dflags [res] SizeofMutableByteArrayOp [arg]
= emitPrimOp dflags [res] SizeofByteArrayOp [arg]
-- #define touchzh(o) /* nothing */
emitPrimOp _ res@[] TouchOp args@[_arg]
= do emitPrimCall res MO_Touch args
-- #define byteArrayContentszh(r,a) r = BYTE_ARR_CTS(a)
emitPrimOp dflags [res] ByteArrayContents_Char [arg]
= emitAssign (CmmLocal res) (cmmOffsetB dflags arg (arrWordsHdrSize dflags))
-- #define stableNameToIntzh(r,s) (r = ((StgStableName *)s)->sn)
emitPrimOp dflags [res] StableNameToIntOp [arg]
= emitAssign (CmmLocal res) (cmmLoadIndexW dflags arg (fixedHdrSizeW dflags) (bWord dflags))
-- #define eqStableNamezh(r,sn1,sn2) \
-- (r = (((StgStableName *)sn1)->sn == ((StgStableName *)sn2)->sn))
emitPrimOp dflags [res] EqStableNameOp [arg1,arg2]
= emitAssign (CmmLocal res) (CmmMachOp (mo_wordEq dflags) [
cmmLoadIndexW dflags arg1 (fixedHdrSizeW dflags) (bWord dflags),
cmmLoadIndexW dflags arg2 (fixedHdrSizeW dflags) (bWord dflags)
])
emitPrimOp dflags [res] ReallyUnsafePtrEqualityOp [arg1,arg2]
= emitAssign (CmmLocal res) (CmmMachOp (mo_wordEq dflags) [arg1,arg2])
-- #define addrToHValuezh(r,a) r=(P_)a
emitPrimOp _ [res] AddrToAnyOp [arg]
= emitAssign (CmmLocal res) arg
-- #define dataToTagzh(r,a) r=(GET_TAG(((StgClosure *)a)->header.info))
-- Note: argument may be tagged!
emitPrimOp dflags [res] DataToTagOp [arg]
= emitAssign (CmmLocal res) (getConstrTag dflags (cmmUntag dflags 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]
= emit $ catAGraphs
[ setInfo arg (CmmLit (CmmLabel mkMAP_FROZEN0_infoLabel)),
mkAssign (CmmLocal res) arg ]
emitPrimOp _ [res] UnsafeFreezeArrayArrayOp [arg]
= emit $ catAGraphs
[ setInfo arg (CmmLit (CmmLabel mkMAP_FROZEN0_infoLabel)),
mkAssign (CmmLocal res) arg ]
emitPrimOp _ [res] UnsafeFreezeSmallArrayOp [arg]
= emit $ catAGraphs
[ setInfo arg (CmmLit (CmmLabel mkSMAP_FROZEN0_infoLabel)),
mkAssign (CmmLocal res) arg ]
-- #define unsafeFreezzeByteArrayzh(r,a) r=(a)
emitPrimOp _ [res] UnsafeFreezeByteArrayOp [arg]
= emitAssign (CmmLocal res) arg
-- Reading/writing pointer arrays
emitPrimOp _ [res] ReadArrayOp [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] IndexArrayOp [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [] WriteArrayOp [obj,ix,v] = doWritePtrArrayOp obj ix v
emitPrimOp _ [res] IndexArrayArrayOp_ByteArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] IndexArrayArrayOp_ArrayArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] ReadArrayArrayOp_ByteArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] ReadArrayArrayOp_MutableByteArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] ReadArrayArrayOp_ArrayArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [res] ReadArrayArrayOp_MutableArrayArray [obj,ix] = doReadPtrArrayOp res obj ix
emitPrimOp _ [] WriteArrayArrayOp_ByteArray [obj,ix,v] = doWritePtrArrayOp obj ix v
emitPrimOp _ [] WriteArrayArrayOp_MutableByteArray [obj,ix,v] = doWritePtrArrayOp obj ix v
emitPrimOp _ [] WriteArrayArrayOp_ArrayArray [obj,ix,v] = doWritePtrArrayOp obj ix v
emitPrimOp _ [] WriteArrayArrayOp_MutableArrayArray [obj,ix,v] = doWritePtrArrayOp obj ix v
emitPrimOp _ [res] ReadSmallArrayOp [obj,ix] = doReadSmallPtrArrayOp res obj ix
emitPrimOp _ [res] IndexSmallArrayOp [obj,ix] = doReadSmallPtrArrayOp res obj ix
emitPrimOp _ [] WriteSmallArrayOp [obj,ix,v] = doWriteSmallPtrArrayOp obj ix v
-- Getting the size of pointer arrays
emitPrimOp dflags [res] SizeofArrayOp [arg]
= emit $ mkAssign (CmmLocal res) (cmmLoadIndexW dflags arg (fixedHdrSizeW dflags + oFFSET_StgMutArrPtrs_ptrs dflags) (bWord dflags))
emitPrimOp dflags [res] SizeofMutableArrayOp [arg]
= emitPrimOp dflags [res] SizeofArrayOp [arg]
emitPrimOp dflags [res] SizeofArrayArrayOp [arg]
= emitPrimOp dflags [res] SizeofArrayOp [arg]
emitPrimOp dflags [res] SizeofMutableArrayArrayOp [arg]
= emitPrimOp dflags [res] SizeofArrayOp [arg]
emitPrimOp dflags [res] SizeofSmallArrayOp [arg] =
emit $ mkAssign (CmmLocal res)
(cmmLoadIndexW dflags arg
(fixedHdrSizeW dflags + oFFSET_StgSmallMutArrPtrs_ptrs dflags) (bWord dflags))
emitPrimOp dflags [res] SizeofSmallMutableArrayOp [arg] =
emitPrimOp dflags [res] SizeofSmallArrayOp [arg]
-- IndexXXXoffAddr
emitPrimOp dflags res IndexOffAddrOp_Char args = doIndexOffAddrOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexOffAddrOp_WideChar args = doIndexOffAddrOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp dflags res IndexOffAddrOp_Int args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexOffAddrOp_Word args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexOffAddrOp_Addr args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp _ res IndexOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
emitPrimOp _ res IndexOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
emitPrimOp dflags res IndexOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexOffAddrOp_Int8 args = doIndexOffAddrOp (Just (mo_s_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexOffAddrOp_Int16 args = doIndexOffAddrOp (Just (mo_s_16ToWord dflags)) b16 res args
emitPrimOp dflags res IndexOffAddrOp_Int32 args = doIndexOffAddrOp (Just (mo_s_32ToWord dflags)) b32 res args
emitPrimOp _ res IndexOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
emitPrimOp dflags res IndexOffAddrOp_Word8 args = doIndexOffAddrOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexOffAddrOp_Word16 args = doIndexOffAddrOp (Just (mo_u_16ToWord dflags)) b16 res args
emitPrimOp dflags res IndexOffAddrOp_Word32 args = doIndexOffAddrOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp _ res IndexOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
-- ReadXXXoffAddr, which are identical, for our purposes, to IndexXXXoffAddr.
emitPrimOp dflags res ReadOffAddrOp_Char args = doIndexOffAddrOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadOffAddrOp_WideChar args = doIndexOffAddrOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp dflags res ReadOffAddrOp_Int args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadOffAddrOp_Word args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadOffAddrOp_Addr args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp _ res ReadOffAddrOp_Float args = doIndexOffAddrOp Nothing f32 res args
emitPrimOp _ res ReadOffAddrOp_Double args = doIndexOffAddrOp Nothing f64 res args
emitPrimOp dflags res ReadOffAddrOp_StablePtr args = doIndexOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadOffAddrOp_Int8 args = doIndexOffAddrOp (Just (mo_s_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadOffAddrOp_Int16 args = doIndexOffAddrOp (Just (mo_s_16ToWord dflags)) b16 res args
emitPrimOp dflags res ReadOffAddrOp_Int32 args = doIndexOffAddrOp (Just (mo_s_32ToWord dflags)) b32 res args
emitPrimOp _ res ReadOffAddrOp_Int64 args = doIndexOffAddrOp Nothing b64 res args
emitPrimOp dflags res ReadOffAddrOp_Word8 args = doIndexOffAddrOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadOffAddrOp_Word16 args = doIndexOffAddrOp (Just (mo_u_16ToWord dflags)) b16 res args
emitPrimOp dflags res ReadOffAddrOp_Word32 args = doIndexOffAddrOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp _ res ReadOffAddrOp_Word64 args = doIndexOffAddrOp Nothing b64 res args
-- IndexXXXArray
emitPrimOp dflags res IndexByteArrayOp_Char args = doIndexByteArrayOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexByteArrayOp_WideChar args = doIndexByteArrayOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp dflags res IndexByteArrayOp_Int args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexByteArrayOp_Word args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexByteArrayOp_Addr args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp _ res IndexByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
emitPrimOp _ res IndexByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
emitPrimOp dflags res IndexByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res IndexByteArrayOp_Int8 args = doIndexByteArrayOp (Just (mo_s_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexByteArrayOp_Int16 args = doIndexByteArrayOp (Just (mo_s_16ToWord dflags)) b16 res args
emitPrimOp dflags res IndexByteArrayOp_Int32 args = doIndexByteArrayOp (Just (mo_s_32ToWord dflags)) b32 res args
emitPrimOp _ res IndexByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
emitPrimOp dflags res IndexByteArrayOp_Word8 args = doIndexByteArrayOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res IndexByteArrayOp_Word16 args = doIndexByteArrayOp (Just (mo_u_16ToWord dflags)) b16 res args
emitPrimOp dflags res IndexByteArrayOp_Word32 args = doIndexByteArrayOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp _ res IndexByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
-- ReadXXXArray, identical to IndexXXXArray.
emitPrimOp dflags res ReadByteArrayOp_Char args = doIndexByteArrayOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadByteArrayOp_WideChar args = doIndexByteArrayOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp dflags res ReadByteArrayOp_Int args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadByteArrayOp_Word args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadByteArrayOp_Addr args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp _ res ReadByteArrayOp_Float args = doIndexByteArrayOp Nothing f32 res args
emitPrimOp _ res ReadByteArrayOp_Double args = doIndexByteArrayOp Nothing f64 res args
emitPrimOp dflags res ReadByteArrayOp_StablePtr args = doIndexByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res ReadByteArrayOp_Int8 args = doIndexByteArrayOp (Just (mo_s_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadByteArrayOp_Int16 args = doIndexByteArrayOp (Just (mo_s_16ToWord dflags)) b16 res args
emitPrimOp dflags res ReadByteArrayOp_Int32 args = doIndexByteArrayOp (Just (mo_s_32ToWord dflags)) b32 res args
emitPrimOp _ res ReadByteArrayOp_Int64 args = doIndexByteArrayOp Nothing b64 res args
emitPrimOp dflags res ReadByteArrayOp_Word8 args = doIndexByteArrayOp (Just (mo_u_8ToWord dflags)) b8 res args
emitPrimOp dflags res ReadByteArrayOp_Word16 args = doIndexByteArrayOp (Just (mo_u_16ToWord dflags)) b16 res args
emitPrimOp dflags res ReadByteArrayOp_Word32 args = doIndexByteArrayOp (Just (mo_u_32ToWord dflags)) b32 res args
emitPrimOp _ res ReadByteArrayOp_Word64 args = doIndexByteArrayOp Nothing b64 res args
-- WriteXXXoffAddr
emitPrimOp dflags res WriteOffAddrOp_Char args = doWriteOffAddrOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteOffAddrOp_WideChar args = doWriteOffAddrOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp dflags res WriteOffAddrOp_Int args = doWriteOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteOffAddrOp_Word args = doWriteOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteOffAddrOp_Addr args = doWriteOffAddrOp Nothing (bWord dflags) res args
emitPrimOp _ res WriteOffAddrOp_Float args = doWriteOffAddrOp Nothing f32 res args
emitPrimOp _ res WriteOffAddrOp_Double args = doWriteOffAddrOp Nothing f64 res args
emitPrimOp dflags res WriteOffAddrOp_StablePtr args = doWriteOffAddrOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteOffAddrOp_Int8 args = doWriteOffAddrOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteOffAddrOp_Int16 args = doWriteOffAddrOp (Just (mo_WordTo16 dflags)) b16 res args
emitPrimOp dflags res WriteOffAddrOp_Int32 args = doWriteOffAddrOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp _ res WriteOffAddrOp_Int64 args = doWriteOffAddrOp Nothing b64 res args
emitPrimOp dflags res WriteOffAddrOp_Word8 args = doWriteOffAddrOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteOffAddrOp_Word16 args = doWriteOffAddrOp (Just (mo_WordTo16 dflags)) b16 res args
emitPrimOp dflags res WriteOffAddrOp_Word32 args = doWriteOffAddrOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp _ res WriteOffAddrOp_Word64 args = doWriteOffAddrOp Nothing b64 res args
-- WriteXXXArray
emitPrimOp dflags res WriteByteArrayOp_Char args = doWriteByteArrayOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteByteArrayOp_WideChar args = doWriteByteArrayOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp dflags res WriteByteArrayOp_Int args = doWriteByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteByteArrayOp_Word args = doWriteByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteByteArrayOp_Addr args = doWriteByteArrayOp Nothing (bWord dflags) res args
emitPrimOp _ res WriteByteArrayOp_Float args = doWriteByteArrayOp Nothing f32 res args
emitPrimOp _ res WriteByteArrayOp_Double args = doWriteByteArrayOp Nothing f64 res args
emitPrimOp dflags res WriteByteArrayOp_StablePtr args = doWriteByteArrayOp Nothing (bWord dflags) res args
emitPrimOp dflags res WriteByteArrayOp_Int8 args = doWriteByteArrayOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteByteArrayOp_Int16 args = doWriteByteArrayOp (Just (mo_WordTo16 dflags)) b16 res args
emitPrimOp dflags res WriteByteArrayOp_Int32 args = doWriteByteArrayOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp _ res WriteByteArrayOp_Int64 args = doWriteByteArrayOp Nothing b64 res args
emitPrimOp dflags res WriteByteArrayOp_Word8 args = doWriteByteArrayOp (Just (mo_WordTo8 dflags)) b8 res args
emitPrimOp dflags res WriteByteArrayOp_Word16 args = doWriteByteArrayOp (Just (mo_WordTo16 dflags)) b16 res args
emitPrimOp dflags res WriteByteArrayOp_Word32 args = doWriteByteArrayOp (Just (mo_WordTo32 dflags)) b32 res args
emitPrimOp _ res WriteByteArrayOp_Word64 args = doWriteByteArrayOp Nothing b64 res args
-- Copying and setting byte arrays
emitPrimOp _ [] CopyByteArrayOp [src,src_off,dst,dst_off,n] =
doCopyByteArrayOp src src_off dst dst_off n
emitPrimOp _ [] CopyMutableByteArrayOp [src,src_off,dst,dst_off,n] =
doCopyMutableByteArrayOp src src_off dst dst_off n
emitPrimOp _ [] CopyByteArrayToAddrOp [src,src_off,dst,n] =
doCopyByteArrayToAddrOp src src_off dst n
emitPrimOp _ [] CopyMutableByteArrayToAddrOp [src,src_off,dst,n] =
doCopyMutableByteArrayToAddrOp src src_off dst n
emitPrimOp _ [] CopyAddrToByteArrayOp [src,dst,dst_off,n] =
doCopyAddrToByteArrayOp src dst dst_off n
emitPrimOp _ [] SetByteArrayOp [ba,off,len,c] =
doSetByteArrayOp ba off len c
emitPrimOp _ [res] BSwap16Op [w] = emitBSwapCall res w W16
emitPrimOp _ [res] BSwap32Op [w] = emitBSwapCall res w W32
emitPrimOp _ [res] BSwap64Op [w] = emitBSwapCall res w W64
emitPrimOp dflags [res] BSwapOp [w] = emitBSwapCall res w (wordWidth dflags)
-- Population count
emitPrimOp _ [res] PopCnt8Op [w] = emitPopCntCall res w W8
emitPrimOp _ [res] PopCnt16Op [w] = emitPopCntCall res w W16
emitPrimOp _ [res] PopCnt32Op [w] = emitPopCntCall res w W32
emitPrimOp _ [res] PopCnt64Op [w] = emitPopCntCall res w W64
emitPrimOp dflags [res] PopCntOp [w] = emitPopCntCall res w (wordWidth dflags)
-- count leading zeros
emitPrimOp _ [res] Clz8Op [w] = emitClzCall res w W8
emitPrimOp _ [res] Clz16Op [w] = emitClzCall res w W16
emitPrimOp _ [res] Clz32Op [w] = emitClzCall res w W32
emitPrimOp _ [res] Clz64Op [w] = emitClzCall res w W64
emitPrimOp dflags [res] ClzOp [w] = emitClzCall res w (wordWidth dflags)
-- count trailing zeros
emitPrimOp _ [res] Ctz8Op [w] = emitCtzCall res w W8
emitPrimOp _ [res] Ctz16Op [w] = emitCtzCall res w W16
emitPrimOp _ [res] Ctz32Op [w] = emitCtzCall res w W32
emitPrimOp _ [res] Ctz64Op [w] = emitCtzCall res w W64
emitPrimOp dflags [res] CtzOp [w] = emitCtzCall res w (wordWidth dflags)
-- Unsigned int to floating point conversions
emitPrimOp _ [res] Word2FloatOp [w] = emitPrimCall [res]
(MO_UF_Conv W32) [w]
emitPrimOp _ [res] Word2DoubleOp [w] = emitPrimCall [res]
(MO_UF_Conv W64) [w]
-- SIMD primops
emitPrimOp dflags [res] (VecBroadcastOp vcat n w) [e] = do
checkVecCompatibility dflags vcat n w
doVecPackOp (vecElemInjectCast dflags vcat w) ty zeros (replicate n e) res
where
zeros :: CmmExpr
zeros = CmmLit $ CmmVec (replicate n zero)
zero :: CmmLit
zero = case vcat of
IntVec -> CmmInt 0 w
WordVec -> CmmInt 0 w
FloatVec -> CmmFloat 0 w
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags [res] (VecPackOp vcat n w) es = do
checkVecCompatibility dflags vcat n w
when (length es /= n) $
panic "emitPrimOp: VecPackOp has wrong number of arguments"
doVecPackOp (vecElemInjectCast dflags vcat w) ty zeros es res
where
zeros :: CmmExpr
zeros = CmmLit $ CmmVec (replicate n zero)
zero :: CmmLit
zero = case vcat of
IntVec -> CmmInt 0 w
WordVec -> CmmInt 0 w
FloatVec -> CmmFloat 0 w
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecUnpackOp vcat n w) [arg] = do
checkVecCompatibility dflags vcat n w
when (length res /= n) $
panic "emitPrimOp: VecUnpackOp has wrong number of results"
doVecUnpackOp (vecElemProjectCast dflags vcat w) ty arg res
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags [res] (VecInsertOp vcat n w) [v,e,i] = do
checkVecCompatibility dflags vcat n w
doVecInsertOp (vecElemInjectCast dflags vcat w) ty v e i res
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecIndexByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexByteArrayOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecReadByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexByteArrayOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecWriteByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doWriteByteArrayOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecIndexOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexOffAddrOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecReadOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexOffAddrOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecWriteOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doWriteOffAddrOp Nothing ty res args
where
ty :: CmmType
ty = vecVmmType vcat n w
emitPrimOp dflags res (VecIndexScalarByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexByteArrayOpAs Nothing vecty ty res args
where
vecty :: CmmType
vecty = vecVmmType vcat n w
ty :: CmmType
ty = vecCmmCat vcat w
emitPrimOp dflags res (VecReadScalarByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexByteArrayOpAs Nothing vecty ty res args
where
vecty :: CmmType
vecty = vecVmmType vcat n w
ty :: CmmType
ty = vecCmmCat vcat w
emitPrimOp dflags res (VecWriteScalarByteArrayOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doWriteByteArrayOp Nothing ty res args
where
ty :: CmmType
ty = vecCmmCat vcat w
emitPrimOp dflags res (VecIndexScalarOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexOffAddrOpAs Nothing vecty ty res args
where
vecty :: CmmType
vecty = vecVmmType vcat n w
ty :: CmmType
ty = vecCmmCat vcat w
emitPrimOp dflags res (VecReadScalarOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doIndexOffAddrOpAs Nothing vecty ty res args
where
vecty :: CmmType
vecty = vecVmmType vcat n w
ty :: CmmType
ty = vecCmmCat vcat w
emitPrimOp dflags res (VecWriteScalarOffAddrOp vcat n w) args = do
checkVecCompatibility dflags vcat n w
doWriteOffAddrOp Nothing ty res args
where
ty :: CmmType
ty = vecCmmCat vcat w
-- Prefetch
emitPrimOp _ res PrefetchByteArrayOp3 args = doPrefetchByteArrayOp 3 res args
emitPrimOp _ res PrefetchMutableByteArrayOp3 args = doPrefetchByteArrayOp 3 res args
emitPrimOp _ res PrefetchAddrOp3 args = doPrefetchAddrOp 3 res args
emitPrimOp _ res PrefetchByteArrayOp2 args = doPrefetchByteArrayOp 2 res args
emitPrimOp _ res PrefetchMutableByteArrayOp2 args = doPrefetchByteArrayOp 2 res args
emitPrimOp _ res PrefetchAddrOp2 args = doPrefetchAddrOp 2 res args
emitPrimOp _ res PrefetchByteArrayOp1 args = doPrefetchByteArrayOp 1 res args
emitPrimOp _ res PrefetchMutableByteArrayOp1 args = doPrefetchByteArrayOp 1 res args
emitPrimOp _ res PrefetchAddrOp1 args = doPrefetchAddrOp 1 res args
emitPrimOp _ res PrefetchByteArrayOp0 args = doPrefetchByteArrayOp 0 res args
emitPrimOp _ res PrefetchMutableByteArrayOp0 args = doPrefetchByteArrayOp 0 res args
emitPrimOp _ res PrefetchAddrOp0 args = doPrefetchAddrOp 0 res args
-- Atomic read-modify-write
emitPrimOp dflags [res] FetchAddByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_Add mba ix (bWord dflags) n
emitPrimOp dflags [res] FetchSubByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_Sub mba ix (bWord dflags) n
emitPrimOp dflags [res] FetchAndByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_And mba ix (bWord dflags) n
emitPrimOp dflags [res] FetchNandByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_Nand mba ix (bWord dflags) n
emitPrimOp dflags [res] FetchOrByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_Or mba ix (bWord dflags) n
emitPrimOp dflags [res] FetchXorByteArrayOp_Int [mba, ix, n] =
doAtomicRMW res AMO_Xor mba ix (bWord dflags) n
emitPrimOp dflags [res] AtomicReadByteArrayOp_Int [mba, ix] =
doAtomicReadByteArray res mba ix (bWord dflags)
emitPrimOp dflags [] AtomicWriteByteArrayOp_Int [mba, ix, val] =
doAtomicWriteByteArray mba ix (bWord dflags) val
emitPrimOp dflags [res] CasByteArrayOp_Int [mba, ix, old, new] =
doCasByteArray res mba ix (bWord dflags) old new
-- The rest just translate straightforwardly
emitPrimOp dflags [res] op [arg]
| nopOp op
= emitAssign (CmmLocal res) arg
| Just (mop,rep) <- narrowOp op
= emitAssign (CmmLocal res) $
CmmMachOp (mop rep (wordWidth dflags)) [CmmMachOp (mop (wordWidth dflags) rep) [arg]]
emitPrimOp dflags r@[res] op args
| Just prim <- callishOp op
= do emitPrimCall r prim args
| Just mop <- translateOp dflags op
= let stmt = mkAssign (CmmLocal res) (CmmMachOp mop args) in
emit stmt
emitPrimOp dflags results op args
= case callishPrimOpSupported dflags op of
Left op -> emit $ mkUnsafeCall (PrimTarget op) results args
Right gen -> gen results args
type GenericOp = [CmmFormal] -> [CmmActual] -> FCode ()
callishPrimOpSupported :: DynFlags -> PrimOp -> Either CallishMachOp GenericOp
callishPrimOpSupported dflags op
= case op of
IntQuotRemOp | ncg && x86ish -> Left (MO_S_QuotRem (wordWidth dflags))
| otherwise -> Right (genericIntQuotRemOp dflags)
WordQuotRemOp | ncg && x86ish -> Left (MO_U_QuotRem (wordWidth dflags))
| otherwise -> Right (genericWordQuotRemOp dflags)
WordQuotRem2Op | ncg && x86ish -> Left (MO_U_QuotRem2 (wordWidth dflags))
| otherwise -> Right (genericWordQuotRem2Op dflags)
WordAdd2Op | ncg && x86ish -> Left (MO_Add2 (wordWidth dflags))
| otherwise -> Right genericWordAdd2Op
IntAddCOp | ncg && x86ish -> Left (MO_AddIntC (wordWidth dflags))
| otherwise -> Right genericIntAddCOp
IntSubCOp | ncg && x86ish -> Left (MO_SubIntC (wordWidth dflags))
| otherwise -> Right genericIntSubCOp
WordMul2Op | ncg && x86ish -> Left (MO_U_Mul2 (wordWidth dflags))
| otherwise -> Right genericWordMul2Op
_ -> pprPanic "emitPrimOp: can't translate PrimOp " (ppr op)
where
ncg = case hscTarget dflags of
HscAsm -> True
_ -> False
x86ish = case platformArch (targetPlatform dflags) of
ArchX86 -> True
ArchX86_64 -> True
_ -> False
genericIntQuotRemOp :: DynFlags -> GenericOp
genericIntQuotRemOp dflags [res_q, res_r] [arg_x, arg_y]
= emit $ mkAssign (CmmLocal res_q)
(CmmMachOp (MO_S_Quot (wordWidth dflags)) [arg_x, arg_y]) <*>
mkAssign (CmmLocal res_r)
(CmmMachOp (MO_S_Rem (wordWidth dflags)) [arg_x, arg_y])
genericIntQuotRemOp _ _ _ = panic "genericIntQuotRemOp"
genericWordQuotRemOp :: DynFlags -> GenericOp
genericWordQuotRemOp dflags [res_q, res_r] [arg_x, arg_y]
= emit $ mkAssign (CmmLocal res_q)
(CmmMachOp (MO_U_Quot (wordWidth dflags)) [arg_x, arg_y]) <*>
mkAssign (CmmLocal res_r)
(CmmMachOp (MO_U_Rem (wordWidth dflags)) [arg_x, arg_y])
genericWordQuotRemOp _ _ _ = panic "genericWordQuotRemOp"
genericWordQuotRem2Op :: DynFlags -> GenericOp
genericWordQuotRem2Op dflags [res_q, res_r] [arg_x_high, arg_x_low, arg_y]
= emit =<< f (widthInBits (wordWidth dflags)) zero arg_x_high arg_x_low
where ty = cmmExprType dflags arg_x_high
shl x i = CmmMachOp (MO_Shl (wordWidth dflags)) [x, i]
shr x i = CmmMachOp (MO_U_Shr (wordWidth dflags)) [x, i]
or x y = CmmMachOp (MO_Or (wordWidth dflags)) [x, y]
ge x y = CmmMachOp (MO_U_Ge (wordWidth dflags)) [x, y]
ne x y = CmmMachOp (MO_Ne (wordWidth dflags)) [x, y]
minus x y = CmmMachOp (MO_Sub (wordWidth dflags)) [x, y]
times x y = CmmMachOp (MO_Mul (wordWidth dflags)) [x, y]
zero = lit 0
one = lit 1
negone = lit (fromIntegral (widthInBits (wordWidth dflags)) - 1)
lit i = CmmLit (CmmInt i (wordWidth dflags))
f :: Int -> CmmExpr -> CmmExpr -> CmmExpr -> FCode CmmAGraph
f 0 acc high _ = return (mkAssign (CmmLocal res_q) acc <*>
mkAssign (CmmLocal res_r) high)
f i acc high low =
do roverflowedBit <- newTemp ty
rhigh' <- newTemp ty
rhigh'' <- newTemp ty
rlow' <- newTemp ty
risge <- newTemp ty
racc' <- newTemp ty
let high' = CmmReg (CmmLocal rhigh')
isge = CmmReg (CmmLocal risge)
overflowedBit = CmmReg (CmmLocal roverflowedBit)
let this = catAGraphs
[mkAssign (CmmLocal roverflowedBit)
(shr high negone),
mkAssign (CmmLocal rhigh')
(or (shl high one) (shr low negone)),
mkAssign (CmmLocal rlow')
(shl low one),
mkAssign (CmmLocal risge)
(or (overflowedBit `ne` zero)
(high' `ge` arg_y)),
mkAssign (CmmLocal rhigh'')
(high' `minus` (arg_y `times` isge)),
mkAssign (CmmLocal racc')
(or (shl acc one) isge)]
rest <- f (i - 1) (CmmReg (CmmLocal racc'))
(CmmReg (CmmLocal rhigh''))
(CmmReg (CmmLocal rlow'))
return (this <*> rest)
genericWordQuotRem2Op _ _ _ = panic "genericWordQuotRem2Op"
genericWordAdd2Op :: GenericOp
genericWordAdd2Op [res_h, res_l] [arg_x, arg_y]
= do dflags <- getDynFlags
r1 <- newTemp (cmmExprType dflags arg_x)
r2 <- newTemp (cmmExprType dflags arg_x)
let topHalf x = CmmMachOp (MO_U_Shr (wordWidth dflags)) [x, hww]
toTopHalf x = CmmMachOp (MO_Shl (wordWidth dflags)) [x, hww]
bottomHalf x = CmmMachOp (MO_And (wordWidth dflags)) [x, hwm]
add x y = CmmMachOp (MO_Add (wordWidth dflags)) [x, y]
or x y = CmmMachOp (MO_Or (wordWidth dflags)) [x, y]
hww = CmmLit (CmmInt (fromIntegral (widthInBits (halfWordWidth dflags)))
(wordWidth dflags))
hwm = CmmLit (CmmInt (halfWordMask dflags) (wordWidth dflags))
emit $ catAGraphs
[mkAssign (CmmLocal r1)
(add (bottomHalf arg_x) (bottomHalf arg_y)),
mkAssign (CmmLocal r2)
(add (topHalf (CmmReg (CmmLocal r1)))
(add (topHalf arg_x) (topHalf arg_y))),
mkAssign (CmmLocal res_h)
(topHalf (CmmReg (CmmLocal r2))),
mkAssign (CmmLocal res_l)
(or (toTopHalf (CmmReg (CmmLocal r2)))
(bottomHalf (CmmReg (CmmLocal r1))))]
genericWordAdd2Op _ _ = panic "genericWordAdd2Op"
genericIntAddCOp :: GenericOp
genericIntAddCOp [res_r, res_c] [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)
-}
= do dflags <- getDynFlags
emit $ catAGraphs [
mkAssign (CmmLocal res_r) (CmmMachOp (mo_wordAdd dflags) [aa,bb]),
mkAssign (CmmLocal res_c) $
CmmMachOp (mo_wordUShr dflags) [
CmmMachOp (mo_wordAnd dflags) [
CmmMachOp (mo_wordNot dflags) [CmmMachOp (mo_wordXor dflags) [aa,bb]],
CmmMachOp (mo_wordXor dflags) [aa, CmmReg (CmmLocal res_r)]
],
mkIntExpr dflags (wORD_SIZE_IN_BITS dflags - 1)
]
]
genericIntAddCOp _ _ = panic "genericIntAddCOp"
genericIntSubCOp :: GenericOp
genericIntSubCOp [res_r, res_c] [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)
-}
= do dflags <- getDynFlags
emit $ catAGraphs [
mkAssign (CmmLocal res_r) (CmmMachOp (mo_wordSub dflags) [aa,bb]),
mkAssign (CmmLocal res_c) $
CmmMachOp (mo_wordUShr dflags) [
CmmMachOp (mo_wordAnd dflags) [
CmmMachOp (mo_wordXor dflags) [aa,bb],
CmmMachOp (mo_wordXor dflags) [aa, CmmReg (CmmLocal res_r)]
],
mkIntExpr dflags (wORD_SIZE_IN_BITS dflags - 1)
]
]
genericIntSubCOp _ _ = panic "genericIntSubCOp"
genericWordMul2Op :: GenericOp
genericWordMul2Op [res_h, res_l] [arg_x, arg_y]
= do dflags <- getDynFlags
let t = cmmExprType dflags arg_x
xlyl <- liftM CmmLocal $ newTemp t
xlyh <- liftM CmmLocal $ newTemp t
xhyl <- liftM CmmLocal $ newTemp t
r <- liftM CmmLocal $ newTemp t
-- This generic implementation is very simple and slow. We might
-- well be able to do better, but for now this at least works.
let topHalf x = CmmMachOp (MO_U_Shr (wordWidth dflags)) [x, hww]
toTopHalf x = CmmMachOp (MO_Shl (wordWidth dflags)) [x, hww]
bottomHalf x = CmmMachOp (MO_And (wordWidth dflags)) [x, hwm]
add x y = CmmMachOp (MO_Add (wordWidth dflags)) [x, y]
sum = foldl1 add
mul x y = CmmMachOp (MO_Mul (wordWidth dflags)) [x, y]