X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FbasicTypes%2FLiteral.lhs;h=1b794a6faae24129889d0ac01ac36e9988ea2ce2;hb=6226441f08e278ec52d5e054768d9bb557ea7de7;hp=d2f65094f92aa5969d6e7c3b278f92f2a3a27954;hpb=4b17269854ccf10df8b3ca1711410a5ca439ea8a;p=ghc-hetmet.git diff --git a/ghc/compiler/basicTypes/Literal.lhs b/ghc/compiler/basicTypes/Literal.lhs index d2f6509..1b794a6 100644 --- a/ghc/compiler/basicTypes/Literal.lhs +++ b/ghc/compiler/basicTypes/Literal.lhs @@ -8,15 +8,19 @@ module Literal ( Literal(..) -- Exported to ParseIface , mkMachInt, mkMachWord , mkMachInt64, mkMachWord64 - , isLitLitLit, maybeLitLit, litIsDupable, + , isLitLitLit, maybeLitLit, litSize, litIsDupable, , literalType, literalPrimRep , 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" @@ -25,15 +29,21 @@ import TysPrim ( charPrimTy, addrPrimTy, floatPrimTy, doublePrimTy, intPrimTy, wordPrimTy, int64PrimTy, word64PrimTy ) import PrimRep ( PrimRep(..) ) -import Type ( Type, typePrimRep ) +import TcType ( Type, tcCmpType ) +import Type ( typePrimRep ) import PprType ( pprParendType ) import CStrings ( pprFSInCStyle ) import Outputable +import FastTypes +import FastString +import Binary import Util ( thenCmp ) -import Ratio ( numerator, denominator ) -import FastString ( uniqueOfFS ) +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 +70,9 @@ 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} @@ -86,27 +99,83 @@ data Literal = ------------------ -- First the primitive guys MachChar Int -- Char# At least 31 bits - | MachStr FAST_STRING + | MachStr FastString | MachAddr Integer -- Whatever this machine thinks is a "pointer" - | 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# -- 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 + | MachLitLit FastString Type -- Type might be Addr# or Int# etc +\end{code} + +Binary instance: must do this manually, because we don't want the type +arg of MachLitLit involved. + +\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 (MachAddr ac) = do putByte bh 2; put_ bh ac + 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) = do putByte bh 9; put_ bh aj + put_ bh (MachLitLit ak _) = do putByte bh 10; put_ bh ak + 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 + ac <- get bh + return (MachAddr ac) + 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 + return (MachLabel aj) + 10 -> do + ak <- get bh + return (MachLitLit ak (error "MachLitLit: no type")) \end{code} \begin{code} @@ -134,22 +203,44 @@ 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 inIntRange, inWordRange :: Integer -> Bool inIntRange x = x >= tARGET_MIN_INT && x <= tARGET_MAX_INT inWordRange x = x >= 0 && x <= tARGET_MAX_WORD + +inCharRange :: Int -> Bool +inCharRange c = c >= 0 && c <= 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 (w - tARGET_MAX_WORD - 1) @@ -159,20 +250,27 @@ 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 c) int2CharLit (MachInt i) = MachChar (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 = MachAddr 0 \end{code} Predicates @@ -189,6 +287,11 @@ litIsDupable :: Literal -> Bool -- False principally of strings litIsDupable (MachStr _) = False litIsDupable other = True + +litSize :: Literal -> Int + -- used by CoreUnfold.sizeExpr +litSize (MachStr str) = lengthFS str `div` 4 +litSize _other = 1 \end{code} Types @@ -238,21 +341,21 @@ 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 +cmpLit (MachLitLit a b) (MachLitLit c d) = (a `compare` c) `thenCmp` (b `tcCmpType` d) +cmpLit lit1 lit2 | litTag lit1 <# 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) +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) \end{code} Printing @@ -265,7 +368,6 @@ 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_)"), text (show ch)] @@ -290,23 +392,28 @@ pprLit lit MachWord64 w | code_style -> pprHexVal w | otherwise -> ptext SLIT("__word64") <+> integer w - MachFloat f | code_style -> ptext SLIT("(StgFloat)") <> rational f + MachFloat f | code_style -> ptext SLIT("(StgFloat)") <> code_rational f | otherwise -> ptext SLIT("__float") <+> rational f - MachDouble d | iface_style && d < 0 -> parens (rational d) - | otherwise -> rational d + MachDouble d | code_style -> code_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 ')' + MachLabel l | code_style -> ptext SLIT("(&") <> ftext l <> char ')' | otherwise -> ptext SLIT("__label") <+> pprHsString l - MachLitLit s ty | code_style -> ptext s + MachLitLit s ty | code_style -> ftext s | otherwise -> parens (hsep [ptext SLIT("__litlit"), pprHsString s, pprParendType ty]) +-- negative floating literals in code style need parentheses to avoid +-- interacting with surrounding syntax. +code_rational d | d < 0 = parens (rational d) + | otherwise = rational d + pprIntVal :: Integer -> SDoc -- Print negative integers with parens to be sure it's unambiguous pprIntVal i | i < 0 = parens (integer i) @@ -357,6 +464,6 @@ 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}