[project @ 2003-04-24 12:25:26 by malcolm]

[ghc-base.git] / NHC / SizedTypes.hs.cpp

diff --git a/NHC/SizedTypes.hs.cpp b/NHC/SizedTypes.hs.cpp
new file mode 100644 (file)
index 0000000..50c3686
--- /dev/null
+++ b/NHC/SizedTypes.hs.cpp
@@ -0,0 +1,48 @@
+module NHC.SizedTypes
+  -- This module just adds instances of Bits for Int/Word[8,16,32,64]
+  ( Int8,  Int16,  Int32,  Int64
+  , Word8, Word16, Word32, Word64
+  ) where
+
+{- Note explicit braces and semicolons here - layout is corrupted by cpp. -}
+
+{import NHC.FFI                (Int8,Int16,Int32,Int64,Word8,Word16,Word32,Word64)
+;import Data.Bits
+
+#define SIZED_TYPE(T,BS,S)     \
+; FOREIGNS(T)                  \
+; INSTANCE_BITS(T,BS,S)
+
+
+#define FOREIGNS(T)    \
+; foreign import ccall nhc_prim##T##And         :: T -> T   -> T       \
+; foreign import ccall nhc_prim##T##Or          :: T -> T   -> T       \
+; foreign import ccall nhc_prim##T##Xor         :: T -> T   -> T       \
+; foreign import ccall nhc_prim##T##Lsh         :: T -> Int -> T       \
+; foreign import ccall nhc_prim##T##Rsh         :: T -> Int -> T       \
+; foreign import ccall nhc_prim##T##Compl       :: T        -> T
+
+
+#define INSTANCE_BITS(T,BS,S)          \
+; instance Bits T where                        \
+    { (.&.)      = nhc_prim##T##And    \
+    ; (.|.)      = nhc_prim##T##Or     \
+    ; xor        = nhc_prim##T##Xor    \
+    ; complement = nhc_prim##T##Compl  \
+    ; shiftL     = nhc_prim##T##Lsh    \
+    ; shiftR     = nhc_prim##T##Rsh    \
+    ; bitSize  _ = BS                  \
+    ; isSigned _ = S                   \
+    }
+
+SIZED_TYPE(Int8,8,True)
+SIZED_TYPE(Int16,16,True)
+SIZED_TYPE(Int32,32,True)
+SIZED_TYPE(Int64,64,True)
+
+SIZED_TYPE(Word8,8,False)
+SIZED_TYPE(Word16,16,False)
+SIZED_TYPE(Word32,32,False)
+SIZED_TYPE(Word64,64,False)
+
+}