( 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
- , word2IntLit, int2WordLit, char2IntLit, int2CharLit
+ , word2IntLit, int2WordLit
+ , intToInt8Lit, intToInt16Lit, intToInt32Lit
+ , wordToWord8Lit, wordToWord16Lit, wordToWord32Lit
+ , char2IntLit, int2CharLit
, float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit
, addr2IntLit, int2AddrLit, float2DoubleLit, double2FloatLit
) where
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 Util ( thenCmp )
import Ratio ( numerator )
-import FastString ( uniqueOfFS )
+import FastString ( uniqueOfFS, lengthFS )
+import Int ( Int8, Int16, Int32 )
+import Word ( Word8, Word16, Word32 )
import Char ( ord, chr )
\end{code}
tARGET_MAX_INT = 2147483647
#endif
tARGET_MAX_WORD = (tARGET_MAX_INT * 2) + 1
+
+tARGET_MAX_CHAR :: Int
+tARGET_MAX_CHAR = 0x10ffff
\end{code}
| 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#
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
\end{code}
Coercions
~~~~~~~~~
\begin{code}
-word2IntLit, int2WordLit, char2IntLit, int2CharLit,
- float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit,
- addr2IntLit, int2AddrLit, float2DoubleLit, double2FloatLit :: Literal -> Literal
+word2IntLit, int2WordLit,
+ intToInt8Lit, intToInt16Lit, intToInt32Lit,
+ wordToWord8Lit, wordToWord16Lit, wordToWord32Lit,
+ char2IntLit, int2CharLit,
+ float2IntLit, int2FloatLit, double2IntLit, int2DoubleLit,
+ addr2IntLit, int2AddrLit, float2DoubleLit, double2FloatLit
+ :: Literal -> Literal
word2IntLit (MachWord w)
| w > tARGET_MAX_INT = MachInt (w - tARGET_MAX_WORD - 1)
| i < 0 = MachWord (1 + tARGET_MAX_WORD + i) -- (-1) ---> tARGET_MAX_WORD
| otherwise = MachWord i
+intToInt8Lit (MachInt i) = MachInt (toInteger (fromInteger i :: Int8))
+intToInt16Lit (MachInt i) = MachInt (toInteger (fromInteger i :: Int16))
+intToInt32Lit (MachInt i) = MachInt (toInteger (fromInteger i :: Int32))
+wordToWord8Lit (MachWord w) = MachWord (toInteger (fromInteger w :: Word8))
+wordToWord16Lit (MachWord w) = MachWord (toInteger (fromInteger w :: Word16))
+wordToWord32Lit (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
-- 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
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 (MachLitLit a b) (MachLitLit c d) = (a `compare` c) `thenCmp` (b `tcCmpType` d)
cmpLit lit1 lit2 | litTag lit1 <# litTag lit2 = LT
| otherwise = GT