, hashLiteral
, inIntRange, inWordRange, tARGET_MAX_INT, inCharRange
+ , isZeroLit,
, word2IntLit, int2WordLit
, narrow8IntLit, narrow16IntLit, narrow32IntLit
import Outputable
import FastTypes
+import FastString
+import Binary
import Util ( thenCmp )
import Ratio ( numerator )
import FastString ( uniqueOfFS, lengthFS )
-import Int ( Int8, Int16, Int32 )
-import Word ( Word8, Word16, Word32 )
+import DATA_INT ( Int8, Int16, Int32 )
+import DATA_WORD ( Word8, Word16, Word32 )
import Char ( ord, chr )
\end{code}
= ------------------
-- 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"
-- "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}
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
litIsDupable other = True
litSize :: Literal -> Int
- -- used by CoreUnfold.sizeExpr
-litSize (MachStr str) = lengthFS str `div` 4
+-- Used by CoreUnfold.sizeExpr
+litSize (MachStr str) = 1 + (lengthFS str `div` 4)
+ -- Every literal has size at least 1, otherwise
+ -- f "x"
+ -- might be too small
litSize _other = 1
\end{code}
= 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)]
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)
-- The 1+ is to avoid zero, which is a Bad Number
-- since we use * to combine hash values
-hashFS :: FAST_STRING -> Int
+hashFS :: FastString -> Int
hashFS s = iBox (uniqueOfFS s)
\end{code}
projects / ghc-hetmet.git / blobdiff