X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FbasicTypes%2FLiteral.lhs;h=e83ea9db74e006ea9b6e9305f8678d7c648074e9;hb=9d7da331989abcd1844e9d03b8d1e4163796fa85;hp=3d53165f2d5b9d1ba9bda74b20e16587cfc23066;hpb=fe69f3c1d6062b90635963aa414c33951bf18427;p=ghc-hetmet.git diff --git a/ghc/compiler/basicTypes/Literal.lhs b/ghc/compiler/basicTypes/Literal.lhs index 3d53165..e83ea9d 100644 --- a/ghc/compiler/basicTypes/Literal.lhs +++ b/ghc/compiler/basicTypes/Literal.lhs @@ -7,16 +7,21 @@ module Literal ( Literal(..) -- Exported to ParseIface , mkMachInt, mkMachWord - , mkMachInt64, mkMachWord64 - , isLitLitLit, maybeLitLit, litIsDupable, - , literalType, literalPrimRep + , mkMachInt64, mkMachWord64, mkStringLit + , litSize + , litIsDupable, litIsTrivial + , literalType , hashLiteral - , inIntRange, inWordRange, tARGET_MAX_INT + , inIntRange, inWordRange, tARGET_MAX_INT, inCharRange + , isZeroLit - , word2IntLit, int2WordLit, char2IntLit, int2CharLit + , word2IntLit, int2WordLit + , narrow8IntLit, narrow16IntLit, narrow32IntLit + , narrow8WordLit, narrow16WordLit, narrow32WordLit + , char2IntLit, int2CharLit , float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit - , addr2IntLit, int2AddrLit, float2DoubleLit, double2FloatLit + , nullAddrLit, float2DoubleLit, double2FloatLit ) where #include "HsVersions.h" @@ -24,16 +29,16 @@ module Literal import TysPrim ( charPrimTy, addrPrimTy, floatPrimTy, doublePrimTy, intPrimTy, wordPrimTy, int64PrimTy, word64PrimTy ) -import PrimRep ( PrimRep(..) ) -import Type ( Type, typePrimRep ) -import PprType ( pprParendType ) -import CStrings ( charToC, charToEasyHaskell, pprFSInCStyle ) - +import Type ( Type ) import Outputable -import Util ( thenCmp ) - -import Ratio ( numerator, denominator ) -import FastString ( uniqueOfFS ) +import FastTypes +import FastString +import Binary + +import Ratio ( numerator ) +import FastString ( uniqueOfFS, lengthFS ) +import DATA_INT ( Int8, Int16, Int32 ) +import DATA_WORD ( Word8, Word16, Word32 ) import Char ( ord, chr ) \end{code} @@ -60,6 +65,9 @@ tARGET_MIN_INT = -2147483648 tARGET_MAX_INT = 2147483647 #endif tARGET_MAX_WORD = (tARGET_MAX_INT * 2) + 1 + +tARGET_MAX_CHAR :: Int +tARGET_MAX_CHAR = 0x10ffff \end{code} @@ -85,28 +93,83 @@ function applications, etc., etc., has not yet been done. data Literal = ------------------ -- First the primitive guys - MachChar Char - | MachStr FAST_STRING + MachChar Char -- Char# At least 31 bits + + | MachStr FastString -- A string-literal: stored and emitted + -- UTF-8 encoded, we'll arrange to decode it + -- at runtime. Also emitted with a '\0' + -- terminator. - | MachAddr Integer -- Whatever this machine thinks is a "pointer" + | MachNullAddr -- the NULL pointer, the only pointer value + -- that can be represented as a Literal. - | MachInt Integer -- Int# At least 32 bits + | MachInt Integer -- Int# At least WORD_SIZE_IN_BITS bits | MachInt64 Integer -- Int64# At least 64 bits - | MachWord Integer -- Word# At least 32 bits + | MachWord Integer -- Word# At least WORD_SIZE_IN_BITS bits | MachWord64 Integer -- Word64# At least 64 bits | MachFloat Rational | MachDouble Rational + -- MachLabel is used (only) for the literal derived from a + -- "foreign label" declaration. -- string argument is the name of a symbol. This literal -- refers to the *address* of the label. - | MachLabel FAST_STRING -- always an Addr# + | MachLabel FastString -- always an Addr# + (Maybe Int) -- the size (in bytes) of the arguments + -- the label expects. Only applicable with + -- 'stdcall' labels. + -- Just x => "@" will be appended to label + -- name when emitting asm. +\end{code} + +Binary instance - -- lit-lits only work for via-C compilation, hence they - -- are deprecated. The string is emitted verbatim into - -- the C file, and can therefore be any C expression, - -- macro call, #defined constant etc. - | MachLitLit FAST_STRING Type -- Type might be Addr# or Int# etc +\begin{code} +instance Binary Literal where + put_ bh (MachChar aa) = do putByte bh 0; put_ bh aa + put_ bh (MachStr ab) = do putByte bh 1; put_ bh ab + put_ bh (MachNullAddr) = do putByte bh 2 + put_ bh (MachInt ad) = do putByte bh 3; put_ bh ad + put_ bh (MachInt64 ae) = do putByte bh 4; put_ bh ae + put_ bh (MachWord af) = do putByte bh 5; put_ bh af + put_ bh (MachWord64 ag) = do putByte bh 6; put_ bh ag + put_ bh (MachFloat ah) = do putByte bh 7; put_ bh ah + put_ bh (MachDouble ai) = do putByte bh 8; put_ bh ai + put_ bh (MachLabel aj mb) = do putByte bh 9; put_ bh aj ; put_ bh mb + get bh = do + h <- getByte bh + case h of + 0 -> do + aa <- get bh + return (MachChar aa) + 1 -> do + ab <- get bh + return (MachStr ab) + 2 -> do + return (MachNullAddr) + 3 -> do + ad <- get bh + return (MachInt ad) + 4 -> do + ae <- get bh + return (MachInt64 ae) + 5 -> do + af <- get bh + return (MachWord af) + 6 -> do + ag <- get bh + return (MachWord64 ag) + 7 -> do + ah <- get bh + return (MachFloat ah) + 8 -> do + ai <- get bh + return (MachDouble ai) + 9 -> do + aj <- get bh + mb <- get bh + return (MachLabel aj mb) \end{code} \begin{code} @@ -134,94 +197,121 @@ instance Ord Literal where \begin{code} mkMachInt, mkMachWord, mkMachInt64, mkMachWord64 :: Integer -> Literal -mkMachInt x = ASSERT2( inIntRange x, integer x ) MachInt x -mkMachWord x = ASSERT2( inWordRange x, integer x ) MachWord x -mkMachInt64 x = MachInt64 x -- Assertions? -mkMachWord64 x = MachWord64 x -- Ditto? +mkMachInt x = -- ASSERT2( inIntRange x, integer x ) + -- Not true: you can write out of range Int# literals + -- For example, one can write (intToWord# 0xffff0000) to + -- get a particular Word bit-pattern, and there's no other + -- convenient way to write such literals, which is why we allow it. + MachInt x +mkMachWord x = -- ASSERT2( inWordRange x, integer x ) + MachWord x +mkMachInt64 x = MachInt64 x +mkMachWord64 x = MachWord64 x + +mkStringLit :: String -> Literal +mkStringLit s = MachStr (mkFastString s) -- stored UTF-8 encoded inIntRange, inWordRange :: Integer -> Bool inIntRange x = x >= tARGET_MIN_INT && x <= tARGET_MAX_INT inWordRange x = x >= 0 && x <= tARGET_MAX_WORD + +inCharRange :: Char -> Bool +inCharRange c = c >= '\0' && c <= chr tARGET_MAX_CHAR + +isZeroLit :: Literal -> Bool +isZeroLit (MachInt 0) = True +isZeroLit (MachInt64 0) = True +isZeroLit (MachWord 0) = True +isZeroLit (MachWord64 0) = True +isZeroLit (MachFloat 0) = True +isZeroLit (MachDouble 0) = True +isZeroLit other = False \end{code} Coercions ~~~~~~~~~ \begin{code} -word2IntLit, int2WordLit, char2IntLit, int2CharLit, - float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit, - addr2IntLit, int2AddrLit, float2DoubleLit, double2FloatLit :: Literal -> Literal +word2IntLit, int2WordLit, + narrow8IntLit, narrow16IntLit, narrow32IntLit, + narrow8WordLit, narrow16WordLit, narrow32WordLit, + char2IntLit, int2CharLit, + float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit, + float2DoubleLit, double2FloatLit + :: Literal -> Literal word2IntLit (MachWord w) - | w > tARGET_MAX_INT = MachInt ((-1) + tARGET_MAX_WORD - w) + | w > tARGET_MAX_INT = MachInt (w - tARGET_MAX_WORD - 1) | otherwise = MachInt w int2WordLit (MachInt i) | i < 0 = MachWord (1 + tARGET_MAX_WORD + i) -- (-1) ---> tARGET_MAX_WORD | otherwise = MachWord i +narrow8IntLit (MachInt i) = MachInt (toInteger (fromInteger i :: Int8)) +narrow16IntLit (MachInt i) = MachInt (toInteger (fromInteger i :: Int16)) +narrow32IntLit (MachInt i) = MachInt (toInteger (fromInteger i :: Int32)) +narrow8WordLit (MachWord w) = MachWord (toInteger (fromInteger w :: Word8)) +narrow16WordLit (MachWord w) = MachWord (toInteger (fromInteger w :: Word16)) +narrow32WordLit (MachWord w) = MachWord (toInteger (fromInteger w :: Word32)) + char2IntLit (MachChar c) = MachInt (toInteger (ord c)) int2CharLit (MachInt i) = MachChar (chr (fromInteger i)) float2IntLit (MachFloat f) = MachInt (truncate f) int2FloatLit (MachInt i) = MachFloat (fromInteger i) -double2IntLit (MachFloat f) = MachInt (truncate f) +double2IntLit (MachDouble f) = MachInt (truncate f) int2DoubleLit (MachInt i) = MachDouble (fromInteger i) -addr2IntLit (MachAddr a) = MachInt a -int2AddrLit (MachInt i) = MachAddr i - float2DoubleLit (MachFloat f) = MachDouble f double2FloatLit (MachDouble d) = MachFloat d + +nullAddrLit :: Literal +nullAddrLit = MachNullAddr \end{code} Predicates ~~~~~~~~~~ \begin{code} -isLitLitLit (MachLitLit _ _) = True -isLitLitLit _ = False - -maybeLitLit (MachLitLit s t) = Just (s,t) -maybeLitLit _ = Nothing +litIsTrivial :: Literal -> Bool +-- True if there is absolutely no penalty to duplicating the literal +-- c.f. CoreUtils.exprIsTrivial +-- False principally of strings +litIsTrivial (MachStr _) = False +litIsTrivial other = True litIsDupable :: Literal -> Bool - -- True if code space does not go bad if we duplicate this literal - -- False principally of strings +-- True if code space does not go bad if we duplicate this literal +-- c.f. CoreUtils.exprIsDupable +-- Currently we treat it just like litIsTrivial litIsDupable (MachStr _) = False litIsDupable other = True + +litSize :: Literal -> Int +-- Used by CoreUnfold.sizeExpr +litSize (MachStr str) = 1 + ((lengthFS str + 3) `div` 4) + -- Every literal has size at least 1, otherwise + -- f "x" + -- might be too small + -- [Sept03: make literal strings a bit bigger to avoid fruitless + -- duplication of little strings] +litSize _other = 1 \end{code} Types ~~~~~ \begin{code} literalType :: Literal -> Type -literalType (MachChar _) = charPrimTy -literalType (MachStr _) = addrPrimTy -literalType (MachAddr _) = addrPrimTy -literalType (MachInt _) = intPrimTy -literalType (MachWord _) = wordPrimTy -literalType (MachInt64 _) = int64PrimTy -literalType (MachWord64 _) = word64PrimTy -literalType (MachFloat _) = floatPrimTy -literalType (MachDouble _) = doublePrimTy -literalType (MachLabel _) = addrPrimTy -literalType (MachLitLit _ ty) = ty -\end{code} - -\begin{code} -literalPrimRep :: Literal -> PrimRep - -literalPrimRep (MachChar _) = CharRep -literalPrimRep (MachStr _) = AddrRep -- specifically: "char *" -literalPrimRep (MachAddr _) = AddrRep -literalPrimRep (MachInt _) = IntRep -literalPrimRep (MachWord _) = WordRep -literalPrimRep (MachInt64 _) = Int64Rep -literalPrimRep (MachWord64 _) = Word64Rep -literalPrimRep (MachFloat _) = FloatRep -literalPrimRep (MachDouble _) = DoubleRep -literalPrimRep (MachLabel _) = AddrRep -literalPrimRep (MachLitLit _ ty) = typePrimRep ty +literalType MachNullAddr = addrPrimTy +literalType (MachChar _) = charPrimTy +literalType (MachStr _) = addrPrimTy +literalType (MachInt _) = intPrimTy +literalType (MachWord _) = wordPrimTy +literalType (MachInt64 _) = int64PrimTy +literalType (MachWord64 _) = word64PrimTy +literalType (MachFloat _) = floatPrimTy +literalType (MachDouble _) = doublePrimTy +literalType (MachLabel _ _) = addrPrimTy \end{code} @@ -230,99 +320,53 @@ literalPrimRep (MachLitLit _ ty) = typePrimRep ty \begin{code} cmpLit (MachChar a) (MachChar b) = a `compare` b cmpLit (MachStr a) (MachStr b) = a `compare` b -cmpLit (MachAddr a) (MachAddr b) = a `compare` b +cmpLit (MachNullAddr) (MachNullAddr) = EQ cmpLit (MachInt a) (MachInt b) = a `compare` b cmpLit (MachWord a) (MachWord b) = a `compare` b cmpLit (MachInt64 a) (MachInt64 b) = a `compare` b cmpLit (MachWord64 a) (MachWord64 b) = a `compare` b cmpLit (MachFloat a) (MachFloat b) = a `compare` b cmpLit (MachDouble a) (MachDouble b) = a `compare` b -cmpLit (MachLabel a) (MachLabel b) = a `compare` b -cmpLit (MachLitLit a b) (MachLitLit c d) = (a `compare` c) `thenCmp` (b `compare` d) -cmpLit lit1 lit2 | litTag lit1 _LT_ litTag lit2 = LT - | otherwise = GT - -litTag (MachChar _) = ILIT(1) -litTag (MachStr _) = ILIT(2) -litTag (MachAddr _) = ILIT(3) -litTag (MachInt _) = ILIT(4) -litTag (MachWord _) = ILIT(5) -litTag (MachInt64 _) = ILIT(6) -litTag (MachWord64 _) = ILIT(7) -litTag (MachFloat _) = ILIT(8) -litTag (MachDouble _) = ILIT(9) -litTag (MachLabel _) = ILIT(10) -litTag (MachLitLit _ _) = ILIT(11) +cmpLit (MachLabel a _) (MachLabel b _) = a `compare` b +cmpLit lit1 lit2 | litTag lit1 <# litTag lit2 = LT + | otherwise = GT + +litTag (MachChar _) = _ILIT(1) +litTag (MachStr _) = _ILIT(2) +litTag (MachNullAddr) = _ILIT(3) +litTag (MachInt _) = _ILIT(4) +litTag (MachWord _) = _ILIT(5) +litTag (MachInt64 _) = _ILIT(6) +litTag (MachWord64 _) = _ILIT(7) +litTag (MachFloat _) = _ILIT(8) +litTag (MachDouble _) = _ILIT(9) +litTag (MachLabel _ _) = _ILIT(10) \end{code} Printing ~~~~~~~~ * MachX (i.e. unboxed) things are printed unadornded (e.g. 3, 'a', "foo") - exceptions: MachFloat and MachAddr get an initial keyword prefix + exceptions: MachFloat gets an initial keyword prefix. \begin{code} -pprLit lit - = getPprStyle $ \ sty -> - let - code_style = codeStyle sty - iface_style = ifaceStyle sty - in - case lit of - MachChar ch | code_style -> hcat [ptext SLIT("(C_)"), char '\'', - text (charToC ch), char '\''] - | iface_style -> char '\'' <> text (charToEasyHaskell ch) <> char '\'' - | otherwise -> text ['\'', ch, '\''] - - MachStr s | code_style -> pprFSInCStyle s - | otherwise -> pprFSAsString s - - MachInt i | code_style && i == tARGET_MIN_INT -> parens (integer (i+1) <> text "-1") - -- Avoid a problem whereby gcc interprets - -- the constant minInt as unsigned. - | otherwise -> pprIntVal i - - MachInt64 i | code_style -> pprIntVal i -- Same problem with gcc??? - | otherwise -> ptext SLIT("__int64") <+> integer i - - MachWord w | code_style -> pprHexVal w - | otherwise -> ptext SLIT("__word") <+> integer w - - MachWord64 w | code_style -> pprHexVal w - | otherwise -> ptext SLIT("__word64") <+> integer w - - MachFloat f | code_style -> ptext SLIT("(StgFloat)") <> rational f - | otherwise -> ptext SLIT("__float") <+> rational f - - MachDouble d | iface_style && d < 0 -> parens (rational d) - | otherwise -> rational d - - MachAddr p | code_style -> ptext SLIT("(void*)") <> integer p - | otherwise -> ptext SLIT("__addr") <+> integer p - - MachLabel l | code_style -> ptext SLIT("(&") <> ptext l <> char ')' - | otherwise -> ptext SLIT("__label") <+> pprFSAsString l - - MachLitLit s ty | code_style -> ptext s - | otherwise -> parens (hsep [ptext SLIT("__litlit"), - pprFSAsString s, - pprParendType ty]) +pprLit (MachChar ch) = pprHsChar ch +pprLit (MachStr s) = pprHsString s +pprLit (MachInt i) = pprIntVal i +pprLit (MachInt64 i) = ptext SLIT("__int64") <+> integer i +pprLit (MachWord w) = ptext SLIT("__word") <+> integer w +pprLit (MachWord64 w) = ptext SLIT("__word64") <+> integer w +pprLit (MachFloat f) = ptext SLIT("__float") <+> rational f +pprLit (MachDouble d) = rational d +pprLit (MachNullAddr) = ptext SLIT("__NULL") +pprLit (MachLabel l mb) = ptext SLIT("__label") <+> + case mb of + Nothing -> pprHsString l + Just x -> doubleQuotes (text (unpackFS l ++ '@':show x)) pprIntVal :: Integer -> SDoc -- Print negative integers with parens to be sure it's unambiguous pprIntVal i | i < 0 = parens (integer i) | otherwise = integer i - -pprHexVal :: Integer -> SDoc --- Print in C hex format: 0x13fa -pprHexVal 0 = ptext SLIT("0x0") -pprHexVal w = ptext SLIT("0x") <> go w - where - go 0 = empty - go w = go quot <> dig - where - (quot,rem) = w `quotRem` 16 - dig | rem < 10 = char (chr (fromInteger rem + ord '0')) - | otherwise = char (chr (fromInteger rem - 10 + ord 'a')) \end{code} @@ -339,15 +383,14 @@ Hash values should be zero or a positive integer. No negatives please. hashLiteral :: Literal -> Int hashLiteral (MachChar c) = ord c + 1000 -- Keep it out of range of common ints hashLiteral (MachStr s) = hashFS s -hashLiteral (MachAddr i) = hashInteger i +hashLiteral (MachNullAddr) = 0 hashLiteral (MachInt i) = hashInteger i hashLiteral (MachInt64 i) = hashInteger i hashLiteral (MachWord i) = hashInteger i hashLiteral (MachWord64 i) = hashInteger i hashLiteral (MachFloat r) = hashRational r hashLiteral (MachDouble r) = hashRational r -hashLiteral (MachLabel s) = hashFS s -hashLiteral (MachLitLit s _) = hashFS s +hashLiteral (MachLabel s _) = hashFS s hashRational :: Rational -> Int hashRational r = hashInteger (numerator r) @@ -357,6 +400,6 @@ hashInteger i = 1 + abs (fromInteger (i `rem` 10000)) -- The 1+ is to avoid zero, which is a Bad Number -- since we use * to combine hash values -hashFS :: FAST_STRING -> Int -hashFS s = IBOX( uniqueOfFS s ) +hashFS :: FastString -> Int +hashFS s = iBox (uniqueOfFS s) \end{code}