+ -- 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 FastString -- always an Addr#
+ (Maybe Int) -- the size (in bytes) of the arguments
+ -- the label expects. Only applicable with
+ -- 'stdcall' labels.
+ -- Just x => "@<x>" will be appended to label
+ -- name when emitting asm.
+\end{code}
+
+Binary instance
+
+\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)